Patent ID: 11933849
Assignee: DELTA ELECTRONICS, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An inductance detection method of a reluctance motor, comprising:
injecting DC current signals with different signal levels in a d-axis direction, injecting a zero current in a q-axis direction, and acquiring a stator resistance of the reluctance motor accordingly;
injecting a high-frequency sinusoidal signal in the d-axis direction or the q-axis direction;
injecting an align signal command in the q-axis direction or the d-axis direction;
receiving a dq-axes signal generated through injecting the high-frequency sinusoidal signal and the align signal command;
sampling a motor feedback signal generated through receiving the dq-axes signal;
in the direction of injecting the high-frequency sinusoidal signal, calculating an amplitude difference between the high-frequency sinusoidal signal and the motor feedback signal, and adjusting an amplitude of the high-frequency sinusoidal signal according to the amplitude difference for regulating a feedback amplitude of the motor feedback signal; and
wherein when the feedback amplitude reaches an expected amplitude, an apparent inductance of the reluctance motor is calculated based on the dq-axes signal, the motor feedback signal and the stator resistance.