US 11,705,840 B2
Commutation error compensation method and apparatus for electric motor, and storage medium
Lu Wang, Foshan (CN); Ziqiang Zhu, Foshan (CN); and Hong Bin, Foshan (CN)
Assigned to GUANGDONG MIDEA WHITE HOME APPLIANCE TECHNOLOGY INNOVATION CENTER CO., LTD., Foshan (CN); and MIDEA GROUP CO., LTD., Foshan (CN)
Filed by Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd., Foshan (CN); and Midea Group Co., Ltd., Foshan (CN)
Filed on Apr. 11, 2022, as Appl. No. 17/718,171.
Application 17/718,171 is a continuation of application No. PCT/CN2019/118185, filed on Nov. 13, 2019.
Prior Publication US 2022/0239243 A1, Jul. 28, 2022
Int. Cl. H02P 21/09 (2016.01); H02P 21/18 (2016.01); H02P 21/13 (2006.01)
CPC H02P 21/09 (2016.02) [H02P 21/13 (2013.01); H02P 21/18 (2016.02); H02P 2207/05 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for compensating a commutation error of an electric motor, comprising:
collecting a position signal and a three-phase current signal of a rotor that has not been corrected in an electric motor, when the rotor rotates in a set direction; wherein the position signal of the rotor represents a rotation angle of the rotor;
filtering processing the three-phase current signal to obtain a fundamental component of the three-phase current signal, and determining, based on the fundamental component of the three-phase current signal, a position error compensation signal of the electric motor;
determining, according to the position error compensation signal and the position signal of the rotor, an ideal phase interval of the rotor; and
determining, according to the ideal phase interval of the rotor, an adjustment scheme for the rotor of the electric motor, and commutating, according to the adjustment scheme, the rotor of the electric motor.