Hunan CSR Times Electrical Vehicle Company

Zhuzhou, China

Hunan CSR Times Electrical Vehicle Company

Zhuzhou, China
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Lu H.,Tsinghua University | Cheng X.,Eaton Corporation | Qu W.,Tsinghua University | Sheng S.,Tsinghua University | And 2 more authors.
IEEE Transactions on Power Electronics | Year: 2014

Three-phase current reconstruction technique using dc current information in conventional two-level inverters can be used for the purpose of cost reduction and sensor fault tolerance. A novel phase current reconstruction scheme, with reduced immeasurable area and common mode voltage, is proposed in this paper. A tristate pulse-width modulation technique has been employed, in which three adjacent switching states are used to construct the reference voltage. The active switching states are arranged at the edge and the center of a PWM cycle. Fixed sampling and simultaneous three-phase currents can be easily achieved with very little hardware and software requirements. A detailed analysis of the effects of nonidealities leads to regional modifications of the switching sequence resulting in almost the whole hexagon as the feasible area. The usefulness of the proposed reconstruction algorithm has been verified by experimental results obtained from a 4-kW induction motor drive system. Smooth transitions between the redundant and fault-tolerant modes were observed. © 1986-2012 IEEE.


Li Y.,Tsinghua University | Lu H.,Tsinghua University | Qu W.,Tsinghua University | Sheng S.,Tsinghua University | Wang Z.,Hunan CSR Times Electrical Vehicle Co.
2013 IEEE ECCE Asia Downunder - 5th IEEE Annual International Energy Conversion Congress and Exhibition, IEEE ECCE Asia 2013 | Year: 2013

Most sensorless control methods have problems when they are used in surface-mounted permanent magnet synchronous motor (PMSM) that has little salient effect. To solve this problem, a novel low frequency voltage injection method is developed in this paper. Low frequency rotating voltage vectors are imposed on the stator, and the current responses are analyzed to get the rotor position information. Different from high frequency voltage injection, electric torque produced by low frequency voltage would has enough time to move the rotor a little but not big enough to rotate the rotor. The electric torque, friction torque and the cogging torque together will make the rotor oscillate around an equilibrium point. The back electromotive force produced by the rotor movement would have effect in the current response, which is finally used in the rotor position estimation. A rotor position estimation structure based on phase lock loop (PLL) is designed to continuously estimate the rotor position at low speeds and some offline experiments and compensation are added to get more accuracy estimation results. Experiments have been finished on a 1.25 kW PMSM at low speeds and standstill, the correctness of the proposed method has been demonstrated. © 2013 IEEE.


Zhang C.,Hunan University of Technology | Huang Y.,Hunan University of Technology | Huang Y.,Hunan CSR Times Electrical Vehicle Co. | Shao R.,Hunan University of Technology
Journal of Control Theory and Applications | Year: 2012

Current sensor is one of the key elements in the control system of induction motor. Whether the accurate measurement of variables reflecting motor operation status can be made will directly affect the control effect on motor system and therefore the timely, accurate detection of sensor fault is necessary. This paper brings forward an observerbased method of residual generation and fault detection on the basis of the mathematical model of the induction motor. As whether or not the nonlinear part satisfies the Lipschitz conditions does not limit the observer design, the application of such an observer is expanded. Meanwhile, the contradiction between robust error and fault sensitivity is also settled. The correctness and effectiveness of such method are verified by experimental testing on the simulated fault which also casts light on engineering practice. © 2012 South China University of Technology, Academy of Mathematics and Systems Science, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg.


PubMed | Central South University, Hunan University of Technology and Hunan CSR Times Electrical Vehicle Co.
Type: Journal Article | Journal: Sensors (Basel, Switzerland) | Year: 2016

This paper deals with a current sensor fault reconstruction algorithm for the torque closed-loop drive system of an interior PMSM. First, sensor faults are equated to actuator ones by a new introduced state variable. Then, in coordinates, based on the motor model with active flux linkage, a current observer is constructed with a specific sliding mode equivalent control methodology to eliminate the effects of unknown disturbances, and the phase current sensor faults are reconstructed by means of an adaptive method. Finally, an axis current fault processing module is designed based on the reconstructed value. The feasibility and effectiveness of the proposed method are verified by simulation and experimental tests on the RT-LAB platform.


Chen Y.,Tongji University | Li X.F.,Hunan CSR Times Electrical Vehicle Company Ltd | Qu T.,Tongji University
Applied Mechanics and Materials | Year: 2013

The research came up with a road adhesion coefficient estimation method for electric vehicle under tire cornering condition, compared with the previous researches that mainly focused on tire longitudinal behaviors. The designed identification method first distinguishes the states of small longitudinal slip and large longitudinal slip in the condition of tire cornering. Then estimation algorithms for the two conditions above operate respectively. By designing the simulation and selecting typical road conditions, the applicability and validity of the algorithm have been verified. The estimation method can be used to serve the electric vehicle's dynamics stability control system. © (2013) Trans Tech Publications, Switzerland.


Guo S.,CSR Zhuzhou Institute Co. | Xi L.,Hunan CSR Times Electrical Vehicle Co. | Liu L.,Hunan CSR Times Electrical Vehicle Co.
EVS 2010 - Sustainable Mobility Revolution: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition | Year: 2010

The paper sets forth the main technical route of hybrid system for Chinese current urban bus use. Combining with the experience for demonstration operation in some cities of China, it briefly explains the actual operation features and key performance for all kinds of technical routes. Meanwhile, it also analyzes and predicts the usage prospect of hybrid system for Chinese urban bus use.


Shi W.,Hunan CSR Times Electrical Vehicle Co. | Tang G.,Hunan CSR Times Electrical Vehicle Co. | Lei D.,Hunan CSR Times Electrical Vehicle Co.
EVS 2010 - Sustainable Mobility Revolution: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition | Year: 2010

By analyzing the series hybrid energy storage system, this paper carry out comparative analysis ofvarious energy storage elements and select upper capacitor as the series hybrid energy storage element. Top-Down design method is adopted to complete the structural design for the energy storage system, at the same time Ansys-CFX software is adopted to perform analysis for air duct of the energy storage system. A set of series hybrid energy storage system based on supper capacitor is designed and the feasibility of this method is preliminarily validated through vehicle test.


Wang Z.,Hunan CSR Times Electrical Vehicle Co. | Chen J.,Hunan CSR Times Electrical Vehicle Co.
EVS 2010 - Sustainable Mobility Revolution: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition | Year: 2010

this paper describes software and hardware design of electric bus motor control system. Besides, the motor control method for electric bus with AMT is studied. According to the fast adjustment response of the speed loop in the motor controller, the gear-shifting process is adjusted by the motor speed and the shifting time of joggled gears is shortened. The collaborative control is realized between the motor and AMT with the aid of CAN bus technology. The experimental results arising from the road test by the Ministry of Communications show that the motor control system developed is reliable and practicable.


Liao X.,Hunan CSR Times Electrical Vehicle Co. | Deng J.,Hunan CSR Times Electrical Vehicle Co.
EVS 2010 - Sustainable Mobility Revolution: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition | Year: 2010

SHEV bus structure status is quite different from the conventional bus's, for the generator, motor, super-capacitor and the motor controller are added to the bus. To check the structure strength and stiffness, A FEM model for the body and the frame structures of a SHEV bus is established. The body structure is established by beam elements and the frame structure is established by shell elements. The load and the boundary conditions are also added to the FEM model. The strength, stiffness and modal are analyzed under various working conditions. The results show that there are some problems on the structure strength, while the stiffness and the mode characteristic are good enough. Based on the analysis results, the structure's modification and optimization is done and then examined by CAE.


Zhao L.,Hunan CSR Times Electrical Vehicle Co. | Shi W.,Hunan CSR Times Electrical Vehicle Co. | Kun J.W.,Hunan CSR Times Electrical Vehicle Co.
IEEE Transportation Electrification Conference and Expo, ITEC Asia-Pacific 2014 - Conference Proceedings | Year: 2014

With the bus dynamic requirement and the motor output characteristic feature, the peak parameters of motor was attained. The commonly used range of the motor is decided by the actual data which is collected from the running bus in different city. This paper propose that the peak parameters of the motor can be met by the overload capacity in order to reduce the price, weight and dimension. © 2014 IEEE.

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