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:
Jun. 26, 2012
Filed:
Oct. 31, 2006
Xiaohua Tang, Shenzhen, CN;
Xuguang Zhou, Shenzhen, CN;
Hongbin Luo, Shenzhen, CH;
Ming Yu, Shenzhen, CN;
Nan Liu, Shenzhen, CN;
Jian Gong, Shenzhen, CN;
Guangming Yang, Shenzhen, CN;
Xiaohua Tang, Shenzhen, CN;
Xuguang Zhou, Shenzhen, CN;
Hongbin Luo, Shenzhen, CH;
Ming Yu, Shenzhen, CN;
Nan Liu, Shenzhen, CN;
Jian Gong, Shenzhen, CN;
Guangming Yang, Shenzhen, CN;
BYD Company, Ltd., Shenzhen, CN;
Abstract
A control method of the electromotor comprises: setting a target alternating axis current based on the rotor angular velocity of the electromotor and a target direct axis current based on the torque of the motor; simultaneously detecting three-phase currents and current rotor position angle of the electromotor; converting the three-phase currents to an actual alternating axis current and an actual direct axis current by Park and Clark conversions; inputting the difference between the target current and the actual current to a current loop, outputting the required direct axis current and the required alternating axis current; determining the three phase voltages according to the required direct axis current and alternating axis current and the angle of the electromotor rotor position; obtaining PWM control waveform through three-phase voltages, wherein said PWM control waveform is configured to control the conversion from direct current to alternating current and drives the electromotor.