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

Claim 11:
12. The motor detection device according to claim 8, wherein if the signal control circuit receives the high-frequency sinusoidal signal injected in the q-axis direction,
the signal control circuit samples a q-axis current component of the motor feedback signal through the feedback control circuit;
the signal control circuit calculates a second amplitude difference between the high-frequency sinusoidal signal and the q-axis current component;
the signal control circuit modifies the amplitude of the high-frequency sinusoidal signal according to the second amplitude difference for regulating the feedback amplitude, wherein the feedback amplitude is an amplitude of the q-axis current component; and
when the feedback control circuit detects that the amplitude of the q-axis current component reaches the expected amplitude, the feedback control circuit calculates a q-axis inductance of the apparent inductance based on the dq-axes signal, the motor feedback signal and the stator resistance.