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

Claim 4:
5. The inductance detection method according to claim 1, wherein when the high-frequency sinusoidal signal is injected in the q-axis direction, the inductance detection method further comprising:
sampling a q-axis current component of the motor feedback signal;
calculating a second amplitude difference between the high-frequency sinusoidal signal and the q-axis current component;
adjusting 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
wherein when the amplitude of the q-axis current component reaches the expected amplitude, a q-axis inductance of the apparent inductance is calculated based on the dq-axes signal, the motor feedback signal and the stator resistance.