Pole number switching type rotary electric machine and driving method of pole switching type rotary electric machine

摘要

Switching type rotary electric machine having excellent torque-to-current characteristics even at high poles without using a winding switching mechanism, and a method of driving a pole switching electric rotating machine. A stator having stator slots arranged equidistantly in the mechanical angular direction and a rotor rotating with magnetomotive force generated by a current flowing through a stator coil stored in the stator slot , An n-group inverter that supplies an m-phase current to the stator coil, and a control unit that controls the n-group inverter, and is provided with a pole-switching type that switches the number of poles at the time of high-pole driving and low pole driving The control unit is configured to control the current phase degree of freedom, which is the number of current phases per one pole pair that can be controlled by the n-group inverter, in the high-pole drive mode by the number of groups n the number of phases m / 2, the low pole At the time of driving, the current phase of the current flowing through the stator coil so that the number of groups n the number of phases m, provided that the group number n is a multiple of 4, the phase number m is a natural number of 3 or more, which is relatively prime to the group number n Control.