Dual motor power system and control method for pure electric vehicle

US10144309B2 · kind B2 · utility

Assignee

• SAIC MOTOR CORPORATION LIMITED · CN

Inventors

• Hongxiang Leng · Shanghai, CN
• Wen-Hua Li · Shanghai, CN
• Jun Sun · Shanghai, CN
• Xinhua Jiang · Fujian, CN
• Feifei Zhang · Beijing, CN
• Sidong Luo · Shanghai, CN
• Hailong Ge · Shanghai, CN

Key dates

• Filing date: Nov 20, 2015
• Grant date: Dec 4, 2018
• Expiry date: Jan 8, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/72
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A dual motor power system for a pure electric vehicle and a control method thereof are disclosed, wherein within a range defined between upper and lower torque thresholds for the operations of one of the two motors under current vehicle speed, the torque of this motor is changed stepwise with a certain torque step; the required torque of the other motor is determined based on the torque distribution relation of the first and second motors; and the synchronized efficiency of the power system is determined based on the torques of the first and second motors so that the optimal synchronized efficiency of the power system is ergodically searched out, and the optimal working points of the two motors and the corresponding gear of the second motor are determined then.