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

Claim 7:
8. A motor detection device, configured to detect an apparent inductance of a reluctance motor, and comprising:
a signal control circuit, configured to output a dq-axes signal;
a motor driving circuit, receiving the dq-axes signal to generate a driving signal; and
a feedback control circuit, comprising a stator resistance of the reluctance motor, wherein the feedback control circuit samples the driving signal to generate a motor feedback signal,
wherein the signal control circuit receives a high-frequency sinusoidal signal injected in a d-axis direction or a q-axis direction and an align signal command injected in the q-axis direction or the d-axis direction to generate the dq-axes signal;
wherein in the direction of injecting the high-frequency sinusoidal signal, the signal control circuit calculates an amplitude difference between the high-frequency sinusoidal signal and the motor feedback signal, and the signal control circuit modifies an amplitude of the high-frequency sinusoidal signal according to the amplitude difference for regulating a feedback amplitude of the motor feedback signal;
wherein when the feedback control circuit detects that the feedback amplitude reaches an expected amplitude, the feedback control circuit calculates the apparent inductance based on the dq-axes signal, the motor feedback signal and the stator resistance.