PERMANENT MAGNET ROTARY ELECTRIC MOTOR

PROBLEM TO BE SOLVED: To enhance operation efficiency by making the induction voltage constant variable easily and appropriately while controlling complication of the structure of a motor, thereby enlarging the operatable ranges of the number of revolutions and torque, and to enlarge the range operatable with high efficiency. SOLUTION: The permanent magnet rotary electric motor comprises an inner circumferential side rotor 21 and an outer circumferential side rotor 22 having the axes of rotation arranged coaxially, a stator 24 arranged on the outer circumferential side or the inner circumferential side of the inner circumferential side rotor 21 and the outer circumferential side rotor 22, and a relative phase alteration device 25 for altering the relative phase of the inner circumferential side rotor 21 and the outer circumferential side rotor 22. The relative phase alteration device 25 alters the phase difference between the inner circumferential side rotor 21 and the outer circumferential side rotor 22 by constituting a braking device 26 between the inner circumferential side rotor 21 and the housing 51 and controlling the fastening force of the braking device 26. COPYRIGHT: (C)2008,JPO&INPIT