Sensorless drive device of rotary power machine such as switched reluctance motor and generator, and rotation system equipped with the sensorless drive device and rotary power machine

摘要

PROBLEM TO BE SOLVED: To provide a sensorless drive device of dynamo-electric machine capable of rotating a rotor efficiently, by tuning the excitation timing automatically.;SOLUTION: A sensorless drive device includes a driver 55 for rotating a rotor 10 by feeding a current intermittently to an electromagnet thereby exciting the electromagnet, a current measurement device 50 for measuring the magnitude of a ripple current flowing to the electromagnet, a ripple current storage device 98 for storing the magnitude of the ripple current, and a commutation timing determination part 95 for determining the excitation start timing and the excitation end timing of the electromagnet. When the rotor 10 is in free-run state, the ripple current storage device 98 stores the magnitude of the ripple current for at least one period of the angle of the rotor 10, and the commutation timing determination part 95 determines the excitation start timing and the excitation end timing of the electromagnet on the basis of the stored magnitude of the ripple current.;SELECTED DRAWING: Figure 5;COPYRIGHT: (C)2019,JPO&INPIT