Driving method of pole number switching type induction machine and pole number switching type induction machine

摘要

PROBLEM TO BE SOLVED: To provide a method for driving a pole changing type induction method, and a pole changing type induction machine, that are excellent in high torque generation by achieving such a coil structure that a coil coefficient at a high polarity becomes a maximum of 1.SOLUTION: Provided is a method for driving a pole changing type induction machine that is executed by a general controller in a pole changing type induction machine comprising the general controller for driving and controlling two three-phase inverters, and in which stator coils each wound by distribution for three-phase driving are alternately connected with the two three-phase inverters every other pole pair, and a distribution winding coefficient kat a time when the number of slots for each pole and for each phase at a high polarity is defined as q is represented by k=sin(/6)/(q×sin(/6q)). The method includes a step of performing pole changing so that an inter-group phase difference between the two three-phase inverters becomes low polarity at 0° and becomes high at 180° within a range from 0° to 180°, at the general controller.