Patent ID: 11863107
Assignee: DELTA ELECTRONICS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A control method for a rotary electric machine, the control method comprising steps of:
providing a d-axis current command and a q-axis current command;
converting a rotary electric machine current passing through the rotary electric machine into a synchronous reference coordinate current;
computing a high-frequency current variation of the synchronous reference coordinate current;
according to the d-axis current command and the q-axis current command, outputting a first correction value corresponds to the d-axis current command and the q-axis current command;
adding the high-frequency current variation of the synchronous reference coordinate current and the first correction value to generate a second correction value to estimate a rotor position of the rotary electric machine;
outputting a phase estimation value based on the second correction value to perform a coordinate transformation calculation;
measuring the rotor position of the rotary electric machine to output a phase measurement value:
subtracting the phase estimation value from the phase measurement value to generate a phase error; and
continuously generating a revised value based on the phase error, and then adding the phase error and the high-frequency current variation of the synchronous reference coordinate current to generate the second correction value when the rotary electric machine operates in a test mode,
wherein when the phase error falls within a target range, the revised value is assigned as the first correction value, and the revised value, the d-axis current command and the q-axis current command correspond to the revised value are stored.