The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2017
Filed:
Jul. 01, 2014
Guangdong Meizhi Compressor Co., Ltd., Foshan, CN;
Siqing Liao, Foshan, CN;
Xinjie Ren, Foshan, CN;
Wanjie Song, Foshan, CN;
Weimin Xiang, Foshan, CN;
Jijiang Yu, Foshan, CN;
Cheng Zhang, Foshan, CN;
Hong Guo, Foshan, CN;
Jingtao Yang, Foshan, CN;
Guangdong Meizhi Compressor Co., Ltd., Foshan, CN;
Abstract
A method for suppressing a speed fluctuation of a permanent magnet synchronous motor is provided in the present disclosure, including: obtaining a target speed ω_, a feedback speed, a fluctuation speed Δω, a q-axis inductance Land a permanent magnet flux linkage φof the permanent magnet synchronous motor; performing a PI adjusting on Δω to obtain a q-axis reference current I, and obtaining a q-axis target voltage U*according to I, ω_, Δω and φ; performing a PI control on a q-axis actual voltage according to U*to obtain a q-axis compensation current I; obtaining a d-axis target voltage U*according to I, I, ω_, Δω and L; performing a PI control on a d-axis actual voltage according to U*to obtain a d-axis compensation current I; superposing Iand Ito perform a feedforward compensation on a q-axis current and superposing Iand the d-axis reference current to perform a feedforward compensation on a d-axis current.