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:
Aug. 06, 2019
Filed:
Sep. 02, 2015
Crrc Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou, Hunan, CN;
Jianghua Feng, Hunan, CN;
Jing Shang, Hunan, CN;
Junfeng Xu, Hunan, CN;
Yuliang Wen, Hunan, CN;
Xiong Liu, Hunan, CN;
Chaoyang Zhang, Hunan, CN;
Lei Xiao, Hunan, CN;
Yaping He, Hunan, CN;
Yonghui Nan, Hunan, CN;
Hanfeng Zheng, Hunan, CN;
Abstract
A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor.