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:
Jan. 01, 2013
Filed:
Dec. 25, 2007
Xiaohua Tang, Guangdong, CN;
Ming Yu, Shanghai, CN;
Xuguang Zhou, Guangdong, CN;
Jian Gong, Shanghai, CN;
Nan Liu, Guangdong, CN;
Guangming Yang, Guangdong, CN;
Xiaohua Tang, Guangdong, CN;
Ming Yu, Shanghai, CN;
Xuguang Zhou, Guangdong, CN;
Jian Gong, Shanghai, CN;
Nan Liu, Guangdong, CN;
Guangming Yang, Guangdong, CN;
Byd Co. Ltd., , CN;
Abstract
The present invention discloses a method and apparatus for controlling a motor for an electric vehicle. The method and apparatus calculates the current acceleration α of the motor according to the detected rotor position values in real-time, and if the current acceleration α is greater than a predetermined forward acceleration α0, the output torque of the motor is decreased. If the acceleration α is less than a predetermined backward acceleration α1, then the output torque of the motor is decreased. Thus, when the vehicle travels from a normal road surface to a smooth road surface, the decrease or increase output torque may suppress the abrupt speed variations.