Abstract:
According to an embodiment of the invention, an electric machine is provided. The machine includes a support structure, a stator secured to the support structure, and a rotor rotatably secured to the support structure. The machine also includes a circuit board positioned at least partially within the support structure. The circuit board is adapted for controlling an electromagnetic field produced by the stator. The machine also includes a potting material in contact with a first surface of the circuit board and a barrier for at least partially containing the potting material.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    The embodiments described herein relate generally to fluid moving devices, and more specifically, to a blower for moving air. 
         [0002]    Blowers consist of a moving element(s), for example a fan blade(s) that moves within a confined space, for example a furnace or within an air duct. The size, attitude and shape of the blade(s), as well as, the size and shape of the confined space effects the volume of air that a blower provides. The size, attitude and shape of the blade(s), as well as, the size and shape of the confined space also effects the efficiency of the blower. 
         [0003]    For a single speed blower motor the efficiency of the blower may be optimized by providing an optimized fixed position of the blades on the fan and an optimized fixed size and shape of the confined space. For multiple speed motors, for example for modern electronically commutated motors (ECM), a single configuration of fan blades or of the confined shape will not be optimum of all of the available speeds and air flows that the blower with the multiple speed motor may provide. 
         [0004]    Other fluid moving devices move a liquid, for example water. Such liquid moving devices include pool and spa pumps that include rotating members in the form of impellers that moves within a confined space, for example within the housing of the pump. The size, attitude and shape of the impeller(s), as well as, the size and shape of the confined space of the pump housing effects the volume of water that a pump provides. The size, attitude and shape of the impeller(s), as well as, the size and shape of the confined space also effects the efficiency of the pump. 
         [0005]    Fluid moving devices, including for example air moving devices, such as blowers, and liquid moving devices, such as pumps, typically provide fluid flow. Fluid flow is volumetric and includes fluctuations due to density, velocity and pressure. 
         [0006]    For a single speed pump motor the efficiency of the pump may be optimized by providing an optimized fixed position of the impellers on the pump and an optimized fixed size and shape of the pump housing. For multiple speed motors, for example for modem electronically commutated motors (ECM), a single configuration of pump impellers or of the pump housing will not be optimum of all of the available speeds and fluid flows that the pump with the multiple speed motor may provide. 
         [0007]    The present invention is directed to alleviate at least some of these problems with the prior art. 
       BRIEF DESCRIPTION OF THE INVENTION 
       [0008]    According to an embodiment of the invention, an assembly having a moveable surface adapted to advance the flow of fluid in a fluid flow device is provided. The assembly includes a body and a member moveably secured to the body. The assembly also includes a motion device secured to the body and adapted to move the member relative to the body. 
         [0009]    According to an aspect of the invention, the body includes a blower housing and the member includes a wall of the blower housing. 
         [0010]    According to another aspect of the invention, the assembly also includes a controller for controlling the motion device. 
         [0011]    According to yet another aspect of the invention, the assembly is configured such that the controller is adapted to move the member relative to the body in response to changing operating conditions including at least one of air flow, temperature, pressure and turbulence. 
         [0012]    According to another aspect of the invention, the assembly is configured such that the body includes a blower wheel and such that the member includes a blade. 
         [0013]    According to another aspect of the invention, the assembly is configured such that the body includes a fan body and such that the member includes a blade. 
         [0014]    According to another aspect of the invention, the assembly is configured such that the motion device includes a servo motor. 
         [0015]    According to another aspect of the invention, the assembly is configured such that the motion device includes a shape memory alloy wire. 
         [0016]    According to another aspect of the invention, the assembly also includes a second member moveably secured to the body and spaced from the first member. The first member and the second member are connected to an intermediate member. 
         [0017]    According to another aspect of the invention, the assembly is configured such that the body includes a housing and such that the member includes a dampener vane. 
         [0018]    According to another embodiment of the invention, a blower having a moveable member adapted to influence the flow of air through the blower is provided. The blower includes a body and a member moveably secured to the body. The blower also includes a motion device secured to the body and adapted to move the member relative to the body 
         [0019]    According to an aspect of the invention, the blower is configured such that the body includes a blower housing and such that the member includes a wall of the blower housing. 
         [0020]    According to another aspect of the invention, the blower is configured such that the wall is made of a flexible material. 
         [0021]    According to yet another aspect of the invention, the blower is configured such that the body includes a blower wheel and such that the member includes a vane. 
         [0022]    According to another aspect of the invention, the blower is configured such that the motion device includes a servo motor. 
         [0023]    According to another aspect of the invention, the blower is configured such that the motion device includes a shape memory alloy wire. 
         [0024]    According to another aspect of the invention, the blower further includes a controller for controlling the motion device. 
         [0025]    According to another aspect of the invention, the blower is configured such that the controller is adapted to move the member relative to the body in response to changing operating conditions including at least one of air flow, temperature, pressure and turbulence. 
         [0026]    According to another aspect of the invention, the blower is configured such that the body includes a blower wheel and such that the member includes a blade. The blower further includes a second vane moveably secured to the blower wheel and spaced from the first vane. The first vane and the second vane are connected to an intermediate member. The intermediate member is connected to the motion device. 
         [0027]    According to yet another embodiment of the invention, a method for altering the flow of air in a blower is provided. The method includes the steps of providing a body, providing a member, moveably securing the member to the body, providing a motion device and moving the member relative to the body with the motion device. 
         [0028]    According to another aspect of the invention, the method further includes the steps of providing a controller for controlling the motion device, measuring at least one of temperature, air flow, turbulence and pressure, and moving the member relative to the body with the motion device in response to changes in at least one of temperature, air flow, turbulence and pressure. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0029]      FIG. 1  is a plan view, partially in cross section, of an embodiment of the present invention in the form of a configurable blower having a blower housing with a moveable wall; 
           [0030]      FIG. 2  is a perspective view of the blower of  FIG. 1 ; 
           [0031]      FIG. 3  is a plan view, partially in cross section, of an embodiment of the present invention in the form of a configurable blower with a servo and associated linkage; 
           [0032]      FIG. 4  is a plan view of a servo for use in the blower of  FIG. 3 ; 
           [0033]      FIG. 5  is a plan view, partially in cross section, of an embodiment of the present invention in the form of a configurable blower with a generator for generating energy to control the moveable components of the configurable blower; 
           [0034]      FIG. 6  is a plan view, partially in cross section, of an embodiment of the present invention in the form of a flow chamber having a moveable wall in a first position, moveable by a shape memory alloy wire; 
           [0035]      FIG. 7  is a plan view, partially in cross section, of an embodiment of the present invention in the form of a squirrel cage fan with a moveable blade; 
           [0036]      FIG. 8  is a perspective view of an embodiment of the present invention in the form of a squirrel cage fan with a moveable vanes in the outlet duct; 
           [0037]      FIG. 8A  is an partial enlarged view of the fan of  FIG. 8  showing the moveable blade in greater detail; 
           [0038]      FIG. 8B  is an partial enlarged view of the fan of  FIG. 8  showing the first vane being pivoted by an actuator wire; 
           [0039]      FIG. 9  is a plan view of an embodiment of the present invention in the form of a fan having a moveable blade; 
           [0040]      FIG. 9A  is an partial enlarged view of the fan of  FIG. 9  showing the moveable blade in greater detail; 
           [0041]      FIG. 10  is a perspective view of the fan of  FIG. 9 ; 
           [0042]      FIG. 11  is a plan view of a blade of the fan of  FIG. 9 ; 
           [0043]      FIG. 12  is another plan view of a blade of the fan of  FIG. 9 ; 
           [0044]      FIG. 13  is a graph of attack angle of a blade versus lift; 
           [0045]      FIG. 14  is a perspective view of the fan of  FIG. 9  mounted in an outdoor HVAC unit; 
           [0046]      FIG. 15  is a plan view, partially in cross section, of an embodiment of the present invention in the form of a moveable fan blade and a moveable damper vane positioned in the outdoor HVAC unit of  FIG. 14 ; 
           [0047]      FIG. 15A  is a partial enlarged view of a fan blade of the outdoor HVAC unit of  FIGS. 14-15  utilizing an actuation wire; 
           [0048]      FIG. 15B  is a partial enlarged view of a moveable damper vane of the outdoor HVAC unit of  FIGS. 14-15  utilizing an actuation wire; and 
           [0049]      FIG. 16  is a flow chart of another embodiment of the present invention in the form of a method for providing an electric machine. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0050]    Fluid moving devices typically include moving, typically rotating, members or elements moved by a power source, typically an electric motor. The fluid may be a liquid, for example water, or a gas, for example air. 
         [0051]    Liquid moving devices include pool and spa pumps that include rotating elements in the form of impellers that moves within a confined space, for example within the housing of the pump. The size, attitude and shape of the impeller(s), as well as the size and shape of the confined space of the pump housing, effects the volume of water that a pump provides. The size, attitude and shape of the impeller(s), as well as, the size and shape of the confined space also effect the efficiency of the pump. 
         [0052]    For a single speed pump motor the efficiency of the pump may be optimized by providing an optimized fixed position of the impellers on the pump and an optimized fixed size and shape of the pump housing. For multiple speed motors, for example for modem electronically commutated motors (ECM), a single configuration of pump impellers or of the pump housing will not be optimum of all of the available speeds and fluid flows that the pump with the multiple speed motor may provide. 
         [0053]    Gas moving devices are in many forms and are used to move a variety of gases. One such gas is air and the air is typically moved by elements or members that are located in blowers or fans. 
         [0054]    Blowers and fans consist of a moving element(s), for example a blower wheel element(s) or a fan blade(s), respectively, that moves within a confined space, for example a furnace or within an air duct. The size, attitude and shape of the element(s) or blade(s), as well as, the size and shape of the confined space effect the volume of air that a blower provides. The size, attitude and shape of the element(s) or blade(s), as well as, the size and shape of the confined space also effect the efficiency of the blower. 
         [0055]    For a single speed blower motor the efficiency of the blower may be optimized by providing an optimized fixed position of the elements or blades on the Wheel or fan and an optimized fixed size and shape of the confined space. For multiple speed motors, for example for modern electronically commutated motors (ECM), a single configuration of elements or blades or of the confined shape will not be optimum of all of the available speeds and air flows that the fan or blower with the multiple speed motor may provide. 
         [0056]    According to an embodiment of the present invention and referring to  FIGS. 1 and 2 , an assembly  10  having a moveable surface  12  adapted to advance the flow of fluid  14  in a fluid flow device  16  is provided. The assembly  10  includes a body  18  and a member  20  moveably secured to the body  18 . The assembly  10  also includes a motion device  22  secured to the body  18  and adapted to move the member  20  relative to the body  18 . 
         [0057]    The fluid flow device  16  may he any device that provides for the flow of a fluid. For example the fluid flow device  16  may be a liquid pump or, as shown in the embodiment of  FIGS. 1 and 2 , an air flow device. As an air flow device, the device  16  may be in the form of a fan or, as shown, as blower  16 . The blower  16  includes the assembly  10 . 
         [0058]    The body  18  may have any suitable size and shape and may be designed to accommodate the blower  16 . For a cylindrical squirrel cage or generally cylindrically shaped blower  16 , the body  18  typically is generally cylindrical and defines an inlet  24  positional centrally along rotational axis  26  of the blower  16 . The body  18  typically further defines an outlet  28  extending outwardly from periphery  30  of the body, typically in a spirally extending fashion. The blower  16  serves to advance air flow  32  in the direction of arrows  34  from inlet  24  to outlet  28 . The body  18  may be made of any suitable materials and may, for example, be made of a polymer, a metal or a composite. The body  18  may be cast, molded fabricated or welded, or a combination thereof. 
         [0059]    The member  20  may be any member capable of modifying the air flow  32 . The member  20  may have any suitable size and shape. The member  20  may be made of any suitable materials and may, for example, be made of a polymer, a metal or a composite. The member  20  may be cast, molded fabricated or welded, or a combination thereof. 
         [0060]    The motion device  22  may be any device capable of moving the member  20 . The motion device  20  may have any suitable size and shape. The motion device  20  may be made of any suitable materials and may, for example, be made of a polymer, a metal or a composite. The motion device  20  may be cast, molded fabricated or welded, or a combination thereof. 
         [0061]    As shown in the embodiment of  FIGS. 1 and 2 , the body  18  includes a blower housing  36  and the member  20  includes a wall  38  of the blower housing  24 . The wall  38  may be integral with the housing  36  or may be a separate component. The wall  38  may be connected to the housing  36  by, for example, a hinge  40  which may be a living hinge. 
         [0062]    Similar to the body  18 , the blower housing  36  may be made of any suitable materials and may, for example, be made of a polymer, a metal or a composite. The blower housing  36  may be cast, molded fabricated or welded, or a combination thereof, The blower housing  36  may be secured to assembly  10  at, for example, assembly frame  42 . 
         [0063]    The blower  16  may include generally cylindrical body or blower frame  44  to which one or more blades or fins  46  are secured, typically equally spaced about periphery  48  of the frame  44 . 
         [0064]    As shown in  FIG. 1 , the member  20 , that may for example include or be in the form of wall  38  that extends from hinge  40  and may be a separate component or integral with housing  36 . The wall  38  may be made from any suitable, durable material, For example the wall  38  may be made from a polymer, a composite or a metal. The wall  38  may have any suitable shape and may as shown be generally rectangular and generally sheet-like and arcuate. 
         [0065]    The wall  38 , as shown in  FIG. 2 , may be moveable from a first or open position  50  shown as a phantom line to a second or closed position  52  shown in solid. As shown in  FIG. 2 , the wall  38 , when in closed position  52 , is closely conforming to blades  46  of the squirrel cage fan  16 . As shown in  FIG. 1 , the wall  38 , when in open position  50 , is spaced from blades  46  of the squirrel cage fan  16 . Air flow  32  from the fan  16  adjacent the outlet  28  may be varied by moving the wall from the open position  50  to the closed position  52  and back. 
         [0066]    While, as shown, a pivoting, hinged arrangement for moveably positioned the wall  38  onto the housing  36  may be used, it should be appreciated that other arrangements may be used to provide a moveable wall. For example, the wall may extend outwardly as a drawer face along drawer guide rails, not shown, or the wall may be flexible and/or expandable and be moved outwardly by, for example, air pressure. 
         [0067]    The wall  38  is moved by motion device  22 . The motion device may be any device capable of moving the wall. The motion device  22  may manually move the wall or do so under power and/or remotely. It should be appreciated that the motion device may be merely capable of positioning the wall  38  in either the open position  50  or the closed position  52 . Such a motion device may be in the form of a solenoid. Preferably the motion device  22  may be used to selectively position the wall  38  in any desired position from the open position  50  to the closed position  52 . The motion device may, as shown, be an electric motor or a servo  22  which may be configured to so selectively position the wall  38 . 
         [0068]    To selectively position the wall and according to another aspect of the invention, the assembly  10  may further include a controller  54  for controlling the motion device  22 , The controller may be any device capable of sending signals, either by hard wiring or wirelessly to the motion device  22 . The controller  54  may receive signals, either by hard wiring or wirelessly, from a signaling device  56  in the form of, for example, a master controller, a input/output device or a smart device, for example an, I-Phone, an android phone, a laptop or a notebook. 
         [0069]    According to yet another aspect of the invention, the assembly  10  may be configured such that the controller  54  is adapted to move the member  20  or wall  38  relative to the body or housing  40  in response to inputs  58  including, for example changing operating conditions  58 . Such changing operating conditions may include at least one of air flow, temperature, pressure and turbulence. 
         [0070]    As shown in  FIG. 1 , the squirrel cage fan or blower  16  may be rotated by, for example an electric motor  60 . The electric motor  60  may be any motor capable of rotating the blower  16  and may for example be a constant speed motor or a variable speed motor. The motor  60  may, for example, be an induction motor, a permanent magnet motor, a switched reluctance motor or an Electrioncally Commutated motor (ECM). 
         [0071]    According to another embodiment of the present invention and referring to  FIG. 3  and  FIG. 4 , assembly  110  is shown. The assembly  110  is similar to assembly  10  of  FIG. 1  and  FIG. 2  and includes a squirrel cage blower  116  similar to blower  16  of the assembly  10 . The blower  116  is driven by motor  160  similar to motor  60  of  FIG. 1 . The blower  116  includes a moveable wall  138  similar to wall  36  of  FIG. 1  and is moved by motion device  122 . 
         [0072]    The motion device  122  includes a servo motor  123 . The servo motor  123  include an arm  125  which is connected to a linkage  127 . The linkage  127  is connected to the wall  138  to move the wall  138 . As shown the motion device  122  is connected to a battery  129  that serves to power the motion device  122 . 
         [0073]    Referring now to  FIG. 4 , the servo motor  223  is shown in greater detail. The servo motor  223  may be a radio controlled hobby type servo motor. 
         [0074]    According to another embodiment of the present invention and referring now to  FIG. 5 , assembly  210  is shown. The assembly  210  is similar to assembly  10  of  FIG. 1  and includes a squirrel cage blower  216  similar to blower  16  of the assembly  10 . The blower  216  is driven by motor  260  similar to motor  60  of  FIG. 1 . The blower  216  includes a moveable wall  238  similar to wall  38  of  FIG. 1  and is moved by motion device  222 . 
         [0075]    The motion device  222  includes a servo motor  223 . The servo motor  223  includes an arm  225  which is connected to a linkage  227 . The linkage  227  is connected to the wall  238  to move the wall  238 . As shown the motion device  222  is connected to a battery  229  that serves to power the motion device  222 . As shown the blower is connected to a generator  231  that provides electricity to controller  254 , similar to controller  54  of  FIG. 1 . Electricity from the controller  254  is sent to the battery  229  to keep it fully charged. 
         [0076]    According to another embodiment of the present invention and referring now to  FIG. 6 , assembly  310  is shown. The assembly  310  is similar to assembly  10  of  FIG. 1  and may include a squirrel cage blower  316  similar to blower  16  of the assembly  10 . The blower  316  is driven by motor  360  similar to motor  60  of  FIG. 1 . The blower  316  includes a moveable wall  338  similar to wall  38  of  FIG. 1  and is moved by motion device  322 . 
         [0077]    The motion device  322  is different than the motion device  122  of assembly  110 . The motion device  322  includes a shaped memory alloy actuator wire  313 . The wire  313 , when exposed to an electrical current, contracts. This contraction is in the order of magnitude of 3 to 4 percent of its length and thus provides for a stroke or movement of the wire of around 3 to 4 percent of the wire&#39;s length. The wire thus typically may need a device attached to the wire  313  to multiply the stroke it can provide so that it may effectively move the wall  338  sufficiently. For example and as shown the motion device  322  may further include a multiplier  315 . 
         [0078]    The multiplier  315  may be any mechanical device capable of multiplying the movement provided by the wire  313 . For example the multiplier may be a normal bias spring, a dead weight bias, a leaf spring bias, a right angle pull, a simple lever, an adjusting curvature, and a clam shell. The multiplier  315  may be attached to the wire to increase the motion provided by the wire  313 . 
         [0079]    The wire  313  may be electrically connected to power source  317  either directly through a switch  319  or, as shown, through controller  354 , similar to controller  54  of apparatus  10  as shown in  FIG. 1 . 
         [0080]    The wire  313  is a shaped memory alloy actuator wire. The shaped memory alloy actuator wire may be available as a Flexinol® actuator wire. Such Flexinol® actuator wires are available from Dynalloy, Inc, 1562 Reynolds Avenue, Irvine, Calif. 92614. 
         [0081]    The multiplier  315  may be any mechanical device and such devices are described in greater detail in a publication titled “Technical Characteristics of Flexinol® Actuator Wires”, F1140 Rev 1.2, available from Dynalloy, Inc. 1562 Reynolds Avenue, Irvine, Calif. 92614 and available online at http://www.dynalloy.com hereby incorporated in its entirety by reference. 
         [0082]    According to another embodiment of the invention and referring now to  FIG. 7 , assembly  410  is shown. The assembly  410  includes a body  418  in the form of a squirrel cage fan  416 . A moveable member  416  in the form of a first fin or blade  446  is moveably positionable on periphery  448  of the body  418 . 
         [0083]    The fin or blade  446  may be moveable from a first or tangential position  450  (shown as a dashed line) aligned with periphery  448  of the body  418  to a second or radial position  452  (shown as a phantom line) extending radially outward from axis  426  of fan  416 . Air flow  432  from the fan  416  may be varied by pivoting the blade  446  from the open position  450  to the closed position  452  and back. 
         [0084]    The blade  446  may be pivoted in any suitable manner. For example and as shown in  FIG. 7 , a pivoting device  422  in the form of a motor or, as shown, a servo is mounted to the periphery  448  of the fan  416 . The blade  446  is mounted to the servo  422  which rotates the blade  446 . A battery  429  may be used to provide power to the servo  422 . 
         [0085]    While a single, pivoting blade arrangement for moveably positioning a single blade may be used, it should be appreciated and, as shown, other arrangements including multiple, pivoting, spaced apart, blades may be used. For example, additional pivoting blades  446 , (shown as dashed lines) may each be positioned on periphery  448  of the body  418 . 
         [0086]    The additional pivoting blades  446  may be pivoted in an suitable manner. For example and as shown adjacent blades  446  are connected at their periphery by links  445 . When the servo  422  which rotates the blade  446  is energized, the adjacent blades  446  are pivoted by the links connected to the blade rotated by the servo  422 . 
         [0087]    Alternately, each blade  446  may have its own servo  422  as shown in phantom. 
         [0088]    Alternately, the first blade  446  may be pivoted by the use of an actuator wire  413 , similar to wire  313  of the assembly  310  of  FIG. 6 . The stroke of the wire  413  may be multiplied by multiplier  415 , similar to multiplier  315  of the assembly  310  of  FIG. 6 . The additional blades  446  may either be connected by links  445  or each blade may be connected to a wire  413  and a multiplier  415 . 
         [0089]    To selectively position the blades  446  and according to another aspect of the invention, the assembly  410  may further include a controller  454  for controlling the blades  446 . The controller  454  may be any device capable of sending signals, either by hard wiring or wirelessly to the servo  422  or to the wire  413 . The controller  454  may receive signals, either by hard wiring or wirelessly, from a signaling device  456  in the form of, for example, a master controller, a input/output device or a smart device, for example an, I-Phone, an android phone, a laptop or a notebook. 
         [0090]    According to yet another aspect of the invention, the assembly  410  may be configured such that the controller  454  is adapted to move the blades  446  in response to changing inputs  458 , for example to operating conditions. Such changing operating conditions may include at least one of air flow, temperature, pressure and turbulence. 
         [0091]    According to another embodiment of the invention and referring now to  FIG. 8 , assembly  510  is shown. The assembly  510  includes a housing  518 . The assembly also includes a squirrel cage fan  516  rotatable positioned in the housing  518 . The fan  516  is rotated by motor  560  secured to housing  518 . The housing  518  forms an inlet  524  and an outlet  528  such that airflow  532  advances through the assembly  510  in the direction of arrows  534 . As shown in  FIG. 8 , member  520  in the form of a dampener vane is positioned in outlet  526  and is used to vary the airflow  532  through the assembly  510 . 
         [0092]    The dampener vane  520  may be positioned anywhere and in any orientation within the outlet  528  of the assembly  510 . For convenience for example the vanes may be oriented horizontally and/or vertically. As shown in  FIG. 8 , a first dampener vane  519  is positioned horizontally in the outlet  528 , 
         [0093]    According to another aspect of the invention, the assembly is configured such that the first dampener vane  519  may he pivoted such that its affect on airflow  532  may be easily adjusted. As shown in  FIG. 8 , the vane  519  may be moveable from a first open or horizontal position  550  (shown as a solid line) aligned with arrow  534  showing the air flow  532  of the assembly  510  to a second closed or vertical position  452  (shown as a dashed line) extending normal to arrow  534 . Back pressure and thus air flow  532  from the fan  516  may be varied by pivoting the vane  519  from the open position  550  to the closed position  552  and back. 
         [0094]    The vane  519  may be pivoted in any suitable manner. For example and as shown in  FIG. 8A , a pivoting device  522  in the form of a motor or as shown a servo is mounted to the housing  518  of the assembly  510 . The vane  519  is mounted to the servo  522  which rotates the vane  519 . 
         [0095]    While a single, pivoting vane arrangement for moveably positioning a single vane may be used, it should be appreciated and, as shown, other arrangements including multiple, pivoting, spaced apart, vanes may be used. For example, additional pivoting vanes  520 , (shown as solid lines) may each be secured to housing  518  of the assembly  510  and may be oriented, for example, horizontally or vertically. 
         [0096]    The additional pivoting vanes  520  may be pivoted in any suitable manner. For example and as shown adjacent vanes  520  are connected at their periphery by links  545 . When the servo  522  which rotates the first vane  519  is energized, the adjacent vanes  520  are pivoted by the links  545  connected to the vanes  520  rotated by the servo  522 . 
         [0097]    Alternately, each vane  520  may have its own servo  522  as shown in phantom. 
         [0098]    Alternately and as shown in  FIG. 8B , the first vane  519  may be pivoted by the use of an actuator wire  513 , similar to wire  313  of the assembly  310  of  FIG. 6 . The stroke of the wire  513  may be multiplied by multiplier  515 , similar to multiplier  315  of the assembly  310  of  FIG. 6 . The additional vanes  520  may either be connected by links  545  or each blade may be connected to a wire  513  and a multiplier  515 . 
         [0099]    To selectively position the vanes  520  and according to another aspect of the invention, the assembly  510  may further include a controller  554  for controlling the vanes  520 . The controller may be any device capable of sending signals, either by hard wiring or wirelessly to the servo  522  or to the wire  513 . The controller  554  may receive signals, either by hard wiring or wirelessly, from a signaling device  556  in the form of, for example, a master controller, a input/output device or a smart device, for example an, I-Phone, an android phone, a laptop or a notebook. 
         [0100]    According to yet another aspect of the invention, the assembly  510  may be configured such that the controller  554  is adapted to move the vanes  520  in response to inputs  558 , for example to changing operating conditions. Such changing operating conditions may include at least one of air flow, temperature, pressure and turbulence. 
         [0101]    According to another embodiment of the invention and referring now to  FIGS. 9 and 10 , assembly  610  is shown. The assembly  610  includes a motor  660  to which a blade  616  is rotatably secured. The blade  616  is rotated by motor  660 . 
         [0102]    The blade  616  may be positioned anywhere and in any orientation with respect to the motor  660 . For example the blade  616  extends radially from the motor  660  and is position at an angle relative to axis of rotation  626  of the motor  660 . 
         [0103]    According to another aspect of the invention, the assembly is configured such that the blade  616  may be pivoted such that its affect on airflow  632  may be easily adjusted. As shown in  FIG. 9 , the blade  616  may be moveable from a first position  650  (shown as a solid lines) generally normal to rotational axis  626  of motor  660  to a second position  652  (shown as a phantom lines) extending generally parallel to rotational axis  626  of motor  660 . Air flow  632  from blade  616  may be varied by pivoting the blade  616  from the first position  650  to the second position  652  and back. 
         [0104]    The blade  616 , for example first blade  620 , may be pivoted in any suitable manner. For example and as shown in  FIG. 9 , a pivoting device  622  in the form of a motor or, as shown, a servo is mounted to the motor  660 . The blade  616  is mounted to the servo  622  which rotates the first blade  620 . 
         [0105]    While a single, pivoting blade arrangement for moveably positioning first blade  620  may be used, it should be appreciated and, as shown, other arrangements including multiple, pivoting, spaced apart, blades  616  may be used. For example, additional pivoting blades  616 , (shown as solid lines) may each be secured to motor  660  and may be oriented, for example, extending from motor  660 . 
         [0106]    The additional pivoting blades  616  may be pivoted in any suitable manner. For example and as shown adjacent blades  616  are connected at their periphery by links  645  that may, for example, have a ring shape. When the servo  522 , which rotates the first blade  620 , is energized, the adjacent blades  616  are pivoted by the links  645  connected to the first blade  620  rotated by the servo  622 . 
         [0107]    Alternately, each blade  620  may have its own servo  622 . 
         [0108]    Alternately and as shown in  FIG. 9A , the first blade  620  may be pivoted by the use of an actuator wire  613 , similar to wire  313  of the assembly  310  of  FIG. 6 . The stroke of the wire  613  may be multiplied by multiplier  615 , similar to multiplier  315  of the assembly  310  of  FIG. 6 . The additional blades  616  may either be connected by links  645  or each blade may be connected to its own wire  613  and its own multiplier  615 . 
         [0109]    To selectively position the blades  620  and according to another aspect of the invention, the assembly  610  may further include a controller  654  for controlling the blades  620 . The controller may be any device capable of sending signals, either by hard wiring or wirelessly to the servo  622  or to the wire  613 . The controller  654  may receive signals, either by hard wiring or wirelessly, from a signaling device  656  in the form of, for example, a master controller, a input/output device or a smart device, for example an, I-Phone, an android phone, a laptop or a notebook. 
         [0110]    According to yet another aspect of the invention, the assembly  610  may be configured such that the controller  654  is adapted to move the blades  620  in response to inputs  658 , for example to changing operating conditions. Such changing operating conditions may include at least one of air flow, temperature, pressure and turbulence. 
         [0111]    It should be appreciated that the motor  660  and the blades  616  may be positioned or mounted to any surface. For example the motor and blades may be mounted to a ceiling to provide air flow below. Alternatively and as shown in  FIGS. 9-10  the motor and blades may be mounted in ducting  680  to provide an assembly  610  including an inlet  624  and an outlet  628 . 
         [0112]    Referring now to  FIGS. 11-13 , the blades  616  may have any suitable shape and may, as shown be shaped to provide desirable aerodynamic characteristics. For example and as shown in  FIG. 11 , the blade  616  may have an upper surface  682  spaced a first direction from longitudinal centerline  678  of the blade  616  and a lower surface  684  spaced a second opposed direction from longitudinal centerline  678  of the blade  616 . The upper surface  682  may have a convex shape to provide lift to the blade  616 . The longitudinal centerline  678  of the blade  616  forms an angle of attack a, when the blade  616  is advanced in the direction of arrow  634 . The lift of the blade  616  results in an effective angle of attack α rel . 
         [0113]    Referring now to  FIG. 12 , the blade is exposed to two external forces when advanced in the direction of arrow  634 . The first force is the drag force D in a direction generally opposed to the direction of arrow  634 . The second force is the lift force L in a direction generally upward and normal to the direction of arrow  634 . 
         [0114]    Referring now to  FIGS. 10-13  and more particularly to  FIG. 13 , drag is plotted on the abscissa and lift is plotted on the ordinate as the angle of attack α rel  is increased, The angle α rel  varies with the speed of the motor  660 . Two different curves are shown, one for each of two separate motor speeds. It should be appreciated that a certain angle of attack α rel  and at a certain speed, lift is maximized. That angle of attack is the α optimum , it is at that α optimum , that the blade  620  should be positioned. Thus, to optimize lift, the angle of attack may be varied as speed is varied by using the servo  622  or wire  613  to position the blade for optimum operation. 
         [0115]    According to another embodiment of the invention and referring now to  FIGS. 14 and 15 , assembly  710  is shown. The assembly  710  includes a motor  760  to which a blade  716  is rotatably secured. The blade  716  is rotated by motor  760 . 
         [0116]    The blade  716  may be positioned anywhere and in any orientation with respect to the motor  760 . For example the blade  716  extends radially from the motor  760  and is position at an angle relative to axis of rotation  726  of the motor  760 . 
         [0117]    According to another aspect of the invention, the assembly is configured such that a first blade  720  of the blades  716  may be pivoted such that its affect on airflow  732  may be easily adjusted. As shown in  FIG. 15 , the blade  716  may be moveable from a first position  750  (shown as a solid line) skewed to the rotational axis  726  of motor  760  to a second position  752  (shown as a dashed line) extending normal with rotational axis  726  of motor  760  and generally perpendicular to rotational axis  726 . Air flow  732  from blade  716  may be varied by pivoting the blade  716  from the first position  750  to the second position  752  and back. 
         [0118]    The blade  716  may be pivoted in any suitable manner. For example and as shown in  FIG. 9 , a pivoting device  722  in the form of a motor or as shown a servo is mounted to the motor  760 . The blade  716  is mounted to the servo  722  which rotates the blade  716 . 
         [0119]    While a single, pivoting blade arrangement for moveably positioning a single blade may be used, it should be appreciated and, as shown, other arrangements including multiple, pivoting, spaced apart, blades may be used. For example, additional pivoting blades  716 , (shown as solid lines) may each be secured to motor  760  and may be oriented, for example, extending from motor  760 . 
         [0120]    The additional pivoting blades  716  may be pivoted in any suitable manner. For example and as shown adjacent blades  716  are connected at their periphery by links  745  that my, for example, have a ring shape. When the servo  722  which rotates first blade  720  is energized, the adjacent blades  716  are pivoted by the links  745  connected to the blade rotated by the servo  722 . 
         [0121]    Alternately, each blade  716  may have its own servo  722 . 
         [0122]    Alternately and referring to  FIG. 15A , the first blade  720  may be pivoted by the use of an actuator wire  713 , similar to wire  313  of the assembly  310  of  FIG. 6 . The stroke of the wire  713  may be multiplied by multiplier  715 , similar to multiplier  315  of the assembly  310  of  FIG. 6 . The additional blades  716  may either be connected by links  745  or each blade may be connected to a wire  713  and a multiplier  715 . 
         [0123]    To further control air flow  732  from the assembly  710  and according to another aspect of the invention and referring again to  FIG. 15 , a member  773  in the form of a dampener vane is positioned in outlet  728  and is used to vary the airflow  732  through the assembly  710 . 
         [0124]    The dampener vane  773  may be positioned anywhere and in any orientation within the outlet  728  of the assembly  710 . For convenience for example, the vanes may be oriented horizontally and/or vertically. As shown in phantom in  FIG. 8 , a first dampener vane  719  is positioned horizontally in the outlet  728 . 
         [0125]    According to another aspect of the invention, the assembly is configured such that the first dampener vane  719  may be pivoted such that its affect on airflow  732  may be easily adjusted. As shown in  FIGS. 14-15 , the first vane  719  may be moveable from a first open or vertical position  762  (shown as a solid line) aligned with arrow  734  showing the air flow  732  of the assembly  710  to a second closed or horizontal position  764  (shown as phantom lines) extending normal to arrow  734 . Back pressure and thus air flow  732  from the fan  716  may be varied by pivoting the first vane  719  from the open position  762  to the closed position  764  and back. 
         [0126]    The vane  719  may be pivoted in any suitable manner. For example and as shown in  FIG. 15 , a pivoting device  766  in the form of a motor or as shown a servo is mounted to the housing  718  of the assembly  710 . The first vane  719  is mounted to the servo  766  which rotates the vane  719 . 
         [0127]    While a single, pivoting vane arrangement for moveably positioning a single vane may be used, it should be appreciated and, as shown, other arrangements including multiple, pivoting, spaced apart, vanes may be used. For example, additional pivoting vanes  773 , (shown as solid lines) may each be secured to housing  718  of the assembly  710  and may be oriented, for example, horizontally or vertically. 
         [0128]    The additional pivoting vanes  773  may be pivoted in any suitable manner. For example and as shown adjacent vanes  773  are connected at their periphery by links  768 . When the servo  766  which rotates the first vane  719  is energized, the adjacent vanes  773  are pivoted by the links  768  connected to the blade rotated by the servo  766 . Alternately, each vane  773  may have its own servo  766 . 
         [0129]    Alternately and referring to  FIG. 15B , the first vane  719  may be pivoted by the use of an actuator wire  770 , similar to wire  313  of the assembly  310  of  FIG. 6 . The stroke of the wire  770  may be multiplied by multiplier  772 , similar to multiplier  315  of the assembly  310  of  FIG. 6 . The additional vanes  773  may either be connected by links  745  or each blade may be connected to a wire  770  and a multiplier  772 . 
         [0130]    Referring again to  FIG. 15 , to selectively position the blades  716  and to selectively position the vanes  773  and according to another aspect of the invention, the assembly  710  may further include a controller  754  for controlling the blades  716  and the vanes  773 . The controller  754  may be any device capable of sending signals, either by hard wiring or wirelessly, to the servo  722  or to the wire  713  to control the blades  716  and of sending signals, either by hard wiring or wirelessly, to the servo  766  or to the wire  770  to control the vanes  773 . The controller  754  may receive signals, either by hard wiring or wirelessly, from a signaling device  756  in the form of for example, a master controller, a input/output device or a smart device, for example an, I-Phone, an android phone, a laptop or a notebook. 
         [0131]    According to yet another embodiment of the invention and referring to  FIG. 16 , a method  800  for altering the flow of air in a blower is provided. The method includes the step  812  of providing a body, the step  814  of providing a member, the step  816  of moveably securing the member to the body, the step  818  of providing a motion device and the step  820  of moving the member relative to the body with the motion device is provided. 
         [0132]    According to another aspect of the invention, the method further includes the steps of providing a controller for controlling the motion device, measuring at least one of temperature, air flow, turbulence and pressure, and moving the member relative to the body with the motion device in response to changes in at least one of temperature, air flow, turbulence and pressure. 
         [0133]    The methods, systems, and apparatus described herein facilitate efficient and economical assembly of an electric machine. Exemplary embodiments of methods, systems, and apparatus are described and/or illustrated herein in detail. The methods, systems, and apparatus are not limited to the specific embodiments described herein, but rather, components of each apparatus and system, as well as steps of each method, may be utilized independently and separately from other components and steps described herein. Each component, and each method step, can also be used in combination with other components and/or method steps. 
         [0134]    When introducing elements/components/etc. of the methods and apparatus described and/or illustrated herein, the articles “a”, “an”, “the”, and “the” are intended to mean that there are one or more of the element(s)/component(s)/etc. The terms “comprising”, “including”, and “having” are intended to be inclusive and mean that there may be additional element(s)/component(s)/etc. other than the listed element(s)/component(s)/etc. 
         [0135]    This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims. 
         [0136]    Described herein are exemplary methods, systems and apparatus utilizing lower cost materials in a permanent magnet machine that reduces or eliminates the efficiency loss caused by the lower cost material. Furthermore, the exemplary methods system and apparatus achieve increased efficiency while reducing or eliminating an increase of the length of the machine. The methods, system and apparatus described herein may be used in any suitable application. However, they are particularly suited for HVAC and pump applications. 
         [0137]    Exemplary embodiments of the fluid flow device and system are described above in detail. The electric machine and its components are not limited to the specific embodiments described herein, but rather, components of the systems may be utilized independently and separately from other components described herein. For example, the components may also be used in combination with other machine systems, methods, and apparatuses, and are not limited to practice with only the systems and apparatus as described herein. Rather, the exemplary embodiments can be implemented and utilized in connection with many other applications. 
         [0138]    Although specific features of various embodiments of the disclosure may be shown in some drawings and not in others, this is for convenience only. In accordance with the principles of the disclosure, any feature of a drawing may be referenced and/or claimed in combination with any feature of any other drawing. 
         [0139]    This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.