Abstract:
An electric power generator device includes a dynamic force source device for generating a dynamic force, a generator further comprising a rotor with an axle for generating electric power with a low rotor speed. and a moment transmission mechanism at least having a first rotating component and a second rotating component; wherein the first rotating component links the second rotating component, is driven by the dynamic force source, and has a contact with the second rotating component being applied by the dynamic force; the second rotating component has a radius being longest in all the rotating components and a center joining the axle; the radius measured from the contact to the center is defined as a moment arm; the moment arm allows the second rotating component to impose a moment on the rotor with the axle so as to perform rotary motion of the rotor and electric power generation of the generator.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation-in-part of application Ser. No. 13/433,808 filed on Mar. 29, 2012, the disclosure of which is incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to generator devices, and more particularly, to an electric power generator device for enabling a generator to generate electric power efficiently with a low rotational speed. 
       BACKGROUND OF THE INVENTION 
       [0003]    US20110006533A1 (corresponding to U.S. Pat. No. 8,678,744 B2), entitled “Hydro Torque Electric Generator”, discloses a hydro torque electric generator for producing electricity from flowing water. The devise has a drive shaft with paddles protruding from the drive shaft into the water current flow causing the shaft to rotate. This rotating motion of the shaft is then transferred to a flywheel shaft such that a large heavy flywheel at the inner end of the flywheel shaft can be turned. The flywheel then turns a power take off shaft connected to an electric generator producing electricity. This unique system uses three parallel shafts with connecting interlocking gears and disconnecting points on each shaft consisting of clutches and a transmission. To stored torque generated from the drive shaft a large heavy flywheel is used, which amplifies the rotational velocity. Once placed in flowing water, the devise generates electricity with a unique motion transfer system converting the linear motion of the flowing water to rotational motion. 
         [0004]    U.S. Pat. No. 7,750,522B2, entitled “SLOW-SPEED DIRECT-DRIVE GENERATOR” , and U.S. Pat. No. 6,664,692B1, entitled “ELECTRICAL MACHINE”, disclose efficient power generation with a low rotational speed specifically. 
       SUMMARY OF THE INVENTION 
       [0005]    It is a primary objective of the present invention to provide an electric power generator device for enabling a generator to generate electric power efficiently. 
         [0006]    In order to achieve the above and other objectives, the present invention provides an electric power generator device, comprising: a dynamic force source device for generating a dynamic force; a generator further comprising a rotor with an axle for generating electric power with a low rotational speed; a moment transmission mechanism at least having a first rotating component and a second rotating component; wherein the first rotating component links the second rotating component, is driven by the dynamic force source, and has a contact with the second rotating component being applied by the dynamic force; the second rotating component has a radius being longest in all the rotating components and a center joining the axle; the radius measured from the contact to the center is defined as a moment arm; the moment arm allows the second rotating component to impose a moment on the rotor with the axle so as to perform rotary motion of the rotor and electric power generation of the generator. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    The structure, features, and advantages of the present invention will be described hereunder with preferred embodiments and illustrated with accompanying drawings, in which: 
           [0008]      FIG. 1  is a structural block diagram of an electric power generator device of the present invention; 
           [0009]      FIG. 2  is a schematic view of the illustration of the working principle of an amplifier for a force, using an example of implementation of a hydraulic system according to the present invention; 
           [0010]      FIG. 3  is a structural schematic view of a moment transmission mechanism of the electric power generator device according to an embodiment of the present invention: 
           [0011]      FIG. 4  is a structural schematic view of the moment transmission mechanism of the electric power generator device according to another embodiment of the present invention; 
           [0012]      FIG. 5  is a schematic view of the electric power generator device according to a variant embodiment of the present invention: and 
           [0013]      FIG. 6  is a schematic view of an example of application of the electric power generator device of the present invention to a vehicle. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0014]    Referring to  FIG. 1 , an electric power generator device  10  of the present invention comprises a dynamic force source device  101 , a generator  103 , and a moment transmission mechanism  105  as described underneath. 
         [0015]    An important feature of the electric power generator device  10  of the present invention lies in making good use of moment-related physical principles to allow the dynamic force source device  101  to drive the rotation of a rotor  103   a  of the generator  103  effectively such that the generator  103  can generate electric power under the condition of low rotor speed. 
         [0016]    The electric power generator device  10  of the present invention can generate electric power efficiently, because the moment transmission mechanism  105  of the present invention functions as an amplifier for a force. An explanation of this phenomenon starts herein with Pascal&#39;s principle. Under Pascal&#39;s principle, a change in the pressure of a specific portion of a stationary fluid in a hermetically sealed container is transferred to the container wall that holds every portion of the fluid. Referring to  FIG. 2  which depicts a hydraulic system, the exertion of a pressure F upon a piston  21  is accompanied by the generation of another pressure exerted upon another piston  23 , wherein, for example, the cross-sectional area of the piston  23  is four times that of the piston  21 , and thus the piston  23  is subjected to an amplified pressure  4 F which is four times that of the pressure F exerted upon a piston  21 . Hence, the hydraulic system of  FIG. 2  functions as an amplifier for a force. Although the present invention differs from the hydraulic system of  FIG. 2  in terms of physical principles, they have a purpose in common, that is, implementation of an amplifier for a force. 
         [0017]    Referring to  FIG. 1  again, the purpose of the dynamic force source device  101  is to generate a dynamic force, and the dynamic force thus generated is transmitted by the moment transmission mechanism  105  to drive the rotary motion of the rotor  103   a  of the generator  103  (see  FIGS. 3 and 4 ). For example, in a specific embodiment, the dynamic force source device  101  is a conventional internal combustion engine, a conventional motor, or a conventional turbine. The conventional internal combustion engine (such as a vehicular engine) undergoes vaporization, ignition, and explosion of gasoline and thus translates a reciprocating motion (or switch-back) motion of a piston into a rotary motion of a crankshaft, such that the rotary motion brings about the dynamic force of the present invention. A conventional motor is supplied with electric power from utility power or a storage battery so as to drive a rotary motion of a rotor of the conventional generator, such that the rotary motion brings about the dynamic force of the present invention. An axle of the conventional turbine is rotated by a passing fluid, and the rotating axle drives the rotor of the conventional generator to undergo a rotary motion, such that the rotary motion of the axle brings about the dynamic force of the present invention. 
         [0018]    The purpose of the generator  103  is to generate electric power under a condition of low rotational speed. In a specific embodiment of the present invention, the generator  103  is a conventional generator for use with a wind power generating windmill. In this regard, the conventional generator can be a multipolar synchronous generator disclosed in related prior art and designed to allow power generation to take place at a low rotational speed. In such a situation, a custom-made conventional generator with 50 to 100 poles or even more than 100 poles is required. 
         [0019]    The moment transmission mechanism  105  is disposed between the dynamic force source device  101  and the rotor  103   a  of the generator  103 . The moment transmission mechanism  105  produces a large moment to the rotor  103   a  because of the dynamic force of the dynamic force source device  101 . In other words, the dynamic force source device  101  impose a moment effect on the rotor  103   a,  allowing the moment transmission mechanism  105  to function as an amplifier for a force and thereby driving the rotor  103   a  effectively to perform the rotary motion. 
         [0020]    A specific embodiment of the present invention is put forth below in conjunction with  FIGS. 3 and 4  to describe how the moment transmission mechanism  105  imposes a moment on the rotor  103   a  of the generator  103 . 
         [0021]    Referring to  FIG. 3 , there is shown a structural schematic view of the moment transmission mechanism  105  according to an embodiment of the present invention. The moment transmission mechanism  105  comprises at least two gears  105   a,    105   b.  The gears  105   a,    105   b  are meshed together. One of the gears  105   a,    105   b,  for example, the gear  105   b,  is fixed to the rotor  103   a  via an axle  1031  of the rotor  103   a.    
         [0022]    The gear  105   a  performs a rotary motion under a dynamic force T generated by the dynamic force source device  101 . The dynamic force source device  101  shown in  FIG. 3  has a shaft to join the gear  105   a  to impose the dynamic force T on the gear  105   a.  It is noted that the dynamic force source is conventional such as an internal combustion engine, a motor, or a turbine and no details will be described further. The gear  105   b  is turned to drive the axle  1031  to rotate due to the rotary motion of the gear  105   a.  As a result, the rotor  103   a  rotates with the axle  1031  synchronously to cause the generator  103  to generate electric power. It can be seen in  FIG. 3  that a contact  105   c,  which is a place the gear  105   a  contacts the gear  105   b  and impose the dynamic force T to the gear  105   h.  The contact  105   c  and the center of the axle  1031  are separated by a distance A which is defined as a moment arm A; the moment arm A is greater than a distance between the contact  105   c  and the center of the gear  105   a.  Under the circumferences, the moment transmission mechanism  105  is capable of imposing a moment effect on the rotor  103   a  by means of the moment arm A. 
         [0023]    Referring to  FIG. 4 , there is shown a structural schematic view of the moment transmission mechanism  105  according to another embodiment of the present invention. The moment transmission mechanism  105  comprises at least two frictional wheels  105   ′a,    105   ′b.  The frictional wheels  105   ′a,    105   ′b  are linked together. One of the frictional wheels  105   ′a,    105   ′b,  for example, the frictional wheel  105   a,  is fixed to the rotor  103   a  via a shaft, and the frictional wheel  105   ′b  is fixed to the axle  1031  of the rotor  103   a.    
         [0024]    The frictional wheel  105   ′a  performs a rotary motion under the dynamic force T generated by the dynamic force source device  101 . The dynamic force source device  101  shown in  FIG. 4  has a shaft to join the gear  105   a  to impose the dynamic force T on the gear  105   a.  It is noted that the dynamic force source  101  can be such as an internal combustion engine, a motor, or a turbine, and it is conventional such that no details will be described further. The frictional wheel  105   ′a  contacts the frictional wheel  1051 ), and turns the frictional wheel  105   ′b  to drive the axle  1031  to rotate synchronously by means of the rotary motion thereof. As a result, the rotor  103   a  rotates and causes the generator  103  to generate electric power. It can be seen in  FIG. 4  that a contact  105   c,  which is a place the gear  105   a  contacts the gear  105   b  and impose the dynamic force T to the gear  105   b.  The contact  105   c  and the center of the axle  1031  are separated by a distance A which is defined as a moment arm A; the moment arm A is greater than a distance between the line of application  105   c  and the center of the gear  105   ′a.  Under the circumferences, the moment transmission mechanism  105  is capable of imposing a moment effect on the rotor  103   a  by means of the moment arm A. 
         [0025]    In practice, both the gear  105   b  of  FIG. 3  and the frictional wheel  105   ′b  of  FIG. 4  have a diameter of 1˜30 m (meters) approximately. The resultant moment effect increases with the diameter of the gear  105   b  or the frictional wheel  105   ′b  proportionally. Under the circumferences, the rotational speed of the rotor  103   a  decreases with increase of the diameter of the gear  105   b  or the frictional wheel  105   ′b  in inverse proportion. Hence, the generator  103  is selected or fabricated for power generation at a low rotational speed. 
         [0026]    The aforesaid two specific embodiments are not restrictive of the moment transmission mechanism  105  of the present invention. Any equivalent variant embodiment devised by persons skilled in the art without departing from the spirit embodied in the moment transmission mechanism  105  of the electric power generator device  10  of the present invention, for example, “a variant embodiment in which the moment transmission mechanism  105  comprises a chain, a deflecting bar, or a link for transmitting a dynamic force under which the rotor  103   a  rotates,” should fall within the scope of the disclosure contained in the present invention. 
         [0027]    Referring to  FIG. 5 , there is shown a schematic view of the electric power generator device according to a variant embodiment of the present invention. Additional technical features recited in this variant embodiment include: the dynamic force source device  101  is an electric motor  101 ′; a portion of electric power generated by the generator  103  is supplied to the electric motor  101 ′; a power dividing device  40 , such as a distributor, provides a distribution electric power P; the portion of the distribution electric power P is returned and supplied to the electric motor  101 ′; and a switching switch  30  switches between electric power of utility power and electric power of a storage battery or returns the portion of electric power, wherein the purpose of the switching switch  30  is to select electric power to be supplied to the electric motor  101 ′. 
         [0028]    Referring to  FIG. 6 , there is shown a schematic view of an example of application of the electric power generator device of the present invention to a vehicle. Conventional electric vehicles (such as electric cars or electric buses) or hybrid electric vehicles use rechargeable batteries (such as lithium rechargeable batteries) or fuel cells as their electric power sources and thus arc more environmentally friendly than petroleum-dependent vehicles. The electric power generator device  10  of the present invention is mounted on an electric vehicle  50 , such as an electric car. an electric bus, an electric ship, or an electric rail car, to substitute for the aforesaid rechargeable batteries or fuel cells. The electric power generator device  10  mounted on the electric vehicle  50  supplies electric power to a vehicle driving motor and a dynamic force control unit. Furthermore, the electric power generator device  10  supplies a charging current to the storage battery. Also, the storage battery supplies electric power to the vehicle driving motor and the dynamic force control unit while the electric power generator device  10  is idle. 
         [0029]    The electric power generator device of the present invention is not only equipped with a moment transmission mechanism that functions as an amplifier for a force but also characterized by integration of a dynamic force and a moment to thereby make good use of a dynamic force generated from a dynamic force source device and enable a generator to generate electric power efficiently-inventive steps disclosed by the present invention. 
         [0030]    Hence, the present invention has novelty, non-obviousness, and industrial applicability and thereby meets the requirements of patentability for certain. 
         [0031]    The present invention is disclosed above by preferred embodiments. However, persons skilled in the art should understand that the preferred embodiments are illustrative of the present invention only, but should not be interpreted as restrictive of the scope of the present invention. Hence, all equivalent variations and modifications made to the aforesaid embodiments in accordance with the disclosure contained in the claims and specification of the present invention should fall within the scope of the present invention.