| 摘要 |
PROBLEM TO BE SOLVED: To increase the maximum number of revolutions by efficiently executing magnetic flux-weakening control of a motor. SOLUTION: A stator of a motor has a structure in which first turns 2141 for each coil 214 are formed around three adjacent teeth 2111, second turns 2142 are formed around three teeth 2111 adjacent centered at one positioned on an end of the three teeth 2111, and thus, a plurality of coils 214 is formed so as to be distributed on four adjacent teeth 2111 of a stator core. With this configuration, the degree of decrease in total magnetic flux by the magnetic flux-weakening control is equalized irrespective of the angle position of the rotor core, and the magnetic flux-weakening control can be efficiently executed. As the result, the maximum number of rotations of the motor can be increased. COPYRIGHT: (C)2008,JPO&INPIT
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