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Gao J.,Hebei University of Technology | Sun H.-X.,Hebei University of Technology | Mi Y.-Q.,Tianjin Qingyuan Electrical Vehicle Co. | Dong Y.,Hebei University of Technology | He L.,Tianjin University of Technology and Education
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2012

For switched reluctance(SR) motor doubly salient structure and the inherent torque ripple caused by switching power supply, in the run-time it is expected to keep the phase inductance curves overlap, the mutual inductance coupling and saturation effects caused by flux interaction was studied. From the perspective of motor design, a detailed analysis of the static performance of the SR motor in single and double phase excitation was carried out: self and mutual inductance curves of the long, short magnetic circuit mode, the flux linkage of adjacent phase, and the mutual inductance effect on the output torque were analyzed. The self and mutual inductance curve were measured by experiment. The theoretical analysis, finite element method and experiments indicate the adjacent two-phase excitation mode of short magnetic circuit obtain higher average torque.

Chunming Z.,China Automotive Technology and Research Center | Qing L.,Tianjin Qingyuan Electrical Vehicle Co.
World Electric Vehicle Journal | Year: 2011

Safety control and protection strategy of high-voltage system of electric vehicles include analysis of circuit condition before connection to high voltage terminal, transient current prevention for capacitive load, real-time monitoring and analysis of high-voltage system during operation, disconnecting strategy of high voltage terminals, vehicle dynamic safety and cooperative management of electrical systems, etc. Monitoring and analysis of some critical parameters of high voltage system such as insulation, electrical harness and connector condition are the basis and difficulties in high-voltage safety and protection. This paper presents several mathematical models of monitoring critical parameters, and experiments were also done to evaluate the model. Disadvantages of the commonly used calculation method are discussed. Single point insulation defect model is introduced and diagnosis method of multiple points defect is also discussed. To satisfy high voltage safety management system based on micro-controller, online diagnosis method of related parameters is studied. Hardware-in-loop (HIL) and complete vehicle experiment were conducted to prove the validity, response and reliability of the proposed method. © 2010 WEVA.

Song J.,Beijing Jiaotong University | Song J.,Tianjin University of Technology and Education | Zhang X.,Beijing Jiaotong University | Tian Y.,Beijing Jiaotong University | Zhou N.,Tianjin Qingyuan Electrical Vehicle Co.
Qiche Gongcheng/Automotive Engineering | Year: 2011

A control strategy based on working mode division is proposed for the multi-energy powertrain assembly of a mild parallel hybrid electric vehicle. A study is conducted on energy optimized distribution algorithm with fuel economy and emission performance as control objectives. A model for the controller of powertrain assembly is built with Matlab/Simulink, and combined with Cruise software, a joint simulation is performed. The results show that the control strategy proposed can improve fuel economy and reduce emission with the original power performance maintained.

Zhang J.,Tianjin University | Yue F.,Tianjin University | Yue F.,Tianjin Qingyuan Electrical Vehicle Co. | Zhou N.,Tianjin Qingyuan Electrical Vehicle Co. | Zhao C.,Tianjin Qingyuan Electrical Vehicle Co.
Applied Mechanics and Materials | Year: 2013

This article mainly introduces parameter design principle of pure electric vehicle power train. The model of a pure electric vehicle is established in CRUISE. Given motor system and battery system, vehicle performance on various transmission ratio was analyzed and the optimal ratio of transmission was determined. Dynamic performances and driving range of the vehicle was tested, which indicate that the error is smaller than 5% between calculated results and test datum. The rationality of established model is verified. The vehicle driving system meet the research targets, which has good dynamic performance and driving range. © (2013) Trans Tech Publications, Switzerland.

Yue F.,Tianjin University | Yue F.,Tianjin Qingyuan Electrical Vehicle Co. | Zhang J.,Tianjin University | Zhou N.,Tianjin Qingyuan Electrical Vehicle Co. | Zheng G.,Tianjin Qingyuan Electrical Vehicle Co.
Qiche Gongcheng/Automotive Engineering | Year: 2014

A model for the powertrain of a pure electric car is established with CRUISE software, and a simulation on its power performance is conducted, providing references for the selection of powertrain. Taking the 2nd gear of transmission as fixed ratio drive, the driving range of electric car is calculated with corresponding test performed. The simulation results are very close to test data, verifying the rationality of the model built.

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