Patent Publication Number: US-2007096585-A1

Title: AC motor stator

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      This invention relates to an AC motor stator, particularly to one provided with a plurality of wire grooves and magnetomotive forces generated by wires of a coil wound around each section between every two neighboring wire grooves of the stator are continuative to one another, so the power of the motor may be upgraded.  
      2. Description of the Prior Art  
      A conventional AC motor stator  30  shown in  FIGS. 1 , 2  and  3  is made of plural thin silicon steel plates  3   1  laminated, and the thin silicon steel plates  31  are respectively provided with a center hole  32  for receiving a rotor  40  therein, and a plurality of wire grooves  33  are axially formed spaced apart equidistantly around the wall defining the center hole  32 , and wires of a coil are wound around each section between two every neighboring wire grooves  33 . having respectively an opening  330  communicating with the center hole  32 . When the coil is electrified, the wires of the coil wound around each section between every two neighboring wire grooves  33  may generate magnetomotive force to force the rotor  40  to rotate. As the wire grooves  33  of the conventional AC motor stator  30  are formed axial, so the magnetomotive force generated by each section between every two neighboring wire grooves  33  is feeble, causing the whole magnetomotive force not distributed evenly and not continuative, so the power of the motor is affected.  
     SUMMARY OF THE INVENTION  
      This invention has been devised to offer an AC motor stator generating the magnetomotive force evenly distributed and each magnetomotive force generated by each section of wires of the coil in each wire groove continues with one another to boost the power of the motor.  
      The feature of the AC motor stator in the invention is wire grooves of the stator are formed to incline for a certain angle to the outer surface of the stator in the same direction, enabling the magnetomotive force generated by the wires of the coil in each section evenly distributed and continue to one another, 
    
    
     BRIEF DESCRIPTION OF DRAWINGS  
      This invention will be better understood by referring to the accompanying drawings, wherein:  
       FIG. 1  is an exploded perspective view of a conventional AC motor stator;  
       FIG. 2  is an upper view of the conventional AC motor stator and the rotor;  
       FIG. 3  is an upper view of the conventional AC motor stator with the rotor fitted in the stator;  
       FIG. 4  is an exploded perspective view of an AC motor stator in the present invention;  
       FIG. 5  is an upper view of the AC motor stator and the rotor in the present invention;  
       FIG. 6  is an upper view of the AC motor stator and the rotor fitted in the stator in the present invention; and,  
       FIG. 7  is a side cross-sectional view of the AC motor stator and the rotor in the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
      A preferred embodiment of an AC motor stator in the present invention, as shown in  FIGS. 4, 5 ,  6  and  7 , includes a plurality of thin silicon steel plates  11  laminated, and the thin silicon steel plates  11  are respectively provided with a center hole  12  for receiving a rotor  20  therein, and a plurality of wire grooves  13  spaced apart equidistantly around the wall defining the center hole  12  for each part of wires of a coil to be received therein. Each wire groove  13  has a narrow opening  130  communicating with the center hole  1 .  
      The wires grooves  13  of the stator  10  are formed inclined in a certain angle to the surface of the stator  10 , and positioned in parallel with one another. So when the coil is electrified, the magnetomotive forces generated by the sections between every each two neighboring wire grooves  13  are continuative with one another to boost the power of the motor. Further, the openings  130  of the wire grooves  13  are also formed to incline as are the wire grooves  13  themselves, and the inclined direction of the wire grooves  13  of the stator is made to be opposite to that of the grooves  21  of a rotor  20 , which are formed also inclined for a certain angle and also parallel to one another, as shown in  FIGS. 4 and 7 .  
      It is quite important that the wire grooves  13  of the stator of an AC motor are formed not straight but inclined for a certain angle to the surface of the stator, so the sections between every two neighboring wire grooves  13  may have the magnetomotive force generated as continuative to each other so as to upgrade the power of the AC motor and permitting the rotor  20  to rotate smoothly.  
      While the preferred embodiment of the inventin has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.