Yongji Xinshisu Electrical Equipment Co.

Kouqian, China

Yongji Xinshisu Electrical Equipment Co.

Kouqian, China
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Liu L.,Xi'an Jiaotong University | Ding W.,Xi'an Jiaotong University | Liu C.,Xi'an Jiaotong University | Ji H.,Yongji Xinshisu Electrical Equipment Co. | Cao C.,National University of Singapore
Nonlinear Dynamics | Year: 2014

This paper considers the design of adaptive sliding mode control approach for synchronization of a class of fractional-order arbitrary dimensional hyperchaotic systems with unknown bounded disturbances. This approach is based on the principle of sliding mode control and adaptive compensation term for solving the problem of synchronization of the unknown parameters in fractional-order nonlinear systems. In particular, a novel fractional-order five dimensional hyperchaotic system has been introduced as a representative example. Furthermore, global stability and asymptotic synchronization between the outputs of master and slave systems can be achieved based on the modified Lyapunov functional and fractional stability condition. Simulation results are provided in detail to illustrate the performance of the proposed approach. © 2014 Springer Science+Business Media Dordrecht.

Li L.,Tianjin Polytechnic University | Yanmin L.,Yongji Xinshisu Electrical Equipment Co.
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011 | Year: 2011

With the development of the logistics, it's necessary to require us to reform the logistics system from an environmental point of view, thus forming an symbiotic type of logistics management system and transforming the one-way relationship between economic development and logistics and between consumption cycle and logistics. In order to prevent logistics from causing damage to the environment, it's absolutely essential to form a modern logistics system that can enhance the healthy development of economy and consumption cycle, namely transformation into green logistics. © 2011 IEEE.

Wu Y.,Huaqiao University | Shang R.,Huaqiao University | Guo X.,Huaqiao University | Li Y.,Yong Ji Xinshisu Electrical Equipment Co. | Yu H.,Yong Ji Xinshisu Electrical Equipment Co.
IEEE Transportation Electrification Conference and Expo, ITEC Asia-Pacific 2014 - Conference Proceedings | Year: 2014

The traction motor works as a inverter in regenerating mode, which achieves energy feedback with unity power factor. Though a proportional-integral(PI) controller is often used in traditional rectifier, bad tracking performance of sinusoidal input current is inevitable. A proportional-resonant(PR) controller resonates at Fundamental frequency of input current to obtain a high gain, which can improve the tracking performance in rectifier. Based on analyzing the single-phase four-quadrant rectifier's principle, the mathematical model of ideal switch is established. A comparison is made between PI controller and PR controller for their effects to the rectifier. The results of this comparison show that the PI controller and the PR controller both can achieve good control effects. But the PR control structure is simpler and it can also improve the control accuracy. Besides, the PR controller is better than the PI controller at both sinusoidal reference tracking and anti-interference. The control theories above are successfully applied in control system of a single-phase four-quadrant rectifier. The simulation results prove the validity of the proposed PR control scheme. © 2014 IEEE.

Chen Z.,Xi'an University of Technology | Zhong Y.,Xi'an University of Technology | Li J.,Xi'an University of Technology | Sun J.,Yongji Xinshisu Electrical Equipment Co. | And 2 more authors.
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2011

The train moves in very wide area and the circumstance is very different. The train must be started in the most difficult circumstance. The electric traction system must provide the enough starting torque for the train. But the torque of the induction motor is influenced by the rotor resistance variation and the rotor resistance variation is influenced by the temperature rise. This paper analyzes the traction characteristics of induction motor from slip frequency and flux orientation. It is proved that slip frequency and flux orientation are essentially uniform. This paper also analyzes the influences that the rotor resistances variation brings to the slip frequency, flux orientation and the starting torque. The microcomputer system (TMS320F2182) to realize entire digital control is designed. The vector control is adopted and the experiment is done. The experimental results show that starting torque is greatly influenced by the rotor resistance and the temperature rise is the key which affects the rotor resistance.

Zhu Q.,Xi'an University of Technology | Yin Z.,Xi'an University of Technology | Zhang Y.,Xi'an University of Technology | Niu J.,Yongji Xinshisu Electrical Equipment Co. | And 2 more authors.
IEEE Transactions on Industrial Electronics | Year: 2016

The internal model control (IMC) has been widely attended for its simple structure and easy realization. Its control performance has a relationship with the filter time constant directly, so that its application of high performance is influenced in the application of motor drive system. A novel method of two-degree-of-freedom (2DOF) IMC strategy of induction motors (IMs) using the immune algorithm (IA) is proposed in this paper. The IA is studied on the basis of the immune response system and the algorithm realization is analyzed. The IA is introduced into the 2DOF IMC, and the filter time constant adjustment online is realized by taking full advantage of the adaptivity of the IA. The simulation and experimental results verify the effectiveness of 2DOF IMC strategy of the IM using the IA. © 1982-2012 IEEE.

Chen Z.,Xi'an University of Technology | Zhong Y.,Xi'an University of Technology | Li J.,Xi'an University of Technology | Liang P.,Yongji Xinshisu Electrical Equipment Co. | Zeng L.,Yongji Xinshisu Electrical Equipment Co.
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2012

The voltage model of rotor flux observer is applied, because it is simple. But the model is extremely sensitive to measurement errors at low speed because the voltage drop of stator resistance and the pure integrator of the voltage model has some disadvantages like DC offset and initial value problems. In this paper, an improved rotor flux observer is presented. The stator electromotive force is compensated by introducing the errors between the current model and the voltage model of the stator flux. The ideal integrator is replaced by the new modified low-pass filter. The voltage model of rotor flux is deduced from the voltage model of stator flux. The speed is identified based on the improved rotor flux observer. Simulation and experimental results verify that this strategy improves the dynamic and static performance of the speed identification, especially at low speed.

Mu D.-S.,Tongji University | Liu G.,Tongji University | Song D.-C.,Tongji University | Zhao C.-X.,Yongji Xinshisu Electrical Equipment CO.
Applied Mechanics and Materials | Year: 2012

A new 3D crankshaft model and a re-manufacturing one were built respectively together with piston, link and etc., According to the static structural module and the fatigue module embedded in ANSYS workbench, their stress distribution charts and fatigue life charts were obtained. By comparison, it can prove that fatigue life of the re-manufacturing crankshaft is very close to new one. © (2012) Trans Tech Publications, Switzerland.

Chen Z.-J.,Yongji Xinshisu Electrical Equipment Co. | Miao G.-M.,Yongji Xinshisu Electrical Equipment Co. | Sun M.-X.,Yongji Xinshisu Electrical Equipment Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2010

The traction motor shaft of 35CrMo steel was fractured during locomotive running. Failure analysis was carried out by means of chemical composition,mechanical properties,microhardness,non-metallic inclusion,metallography observation and analysis. The results show that the main reason of the shaft failure is very poor roughness on non-hardening surface of the section transition round corner.

Sun G.-Q.,China Jiliang University | Niu Z.-J.,Yongji Xinshisu Electrical Equipment Co Ltd | Cai H.,China Jiliang University | Wang B.-R.,China Jiliang University
Jiliang Xuebao/Acta Metrologica Sinica | Year: 2015

A method based on multi-objective evolutionary algorithms (MOEAs) for real-time and in-situ efficiency determination of induction motor is introduced. The multi-objective algorithm is optimized, and it introduces a low-intrusive level method based on non-dominated sorting genetic algorithm-II (NSGA-II) and strengths Pareto evolutionary algorithm 2 (SPEA2) for efficiency estimation of the induction motor. Therefore, the equivalent circuit method, and the segregated losses method combine with MOEAs. Through the practice of a 5.5 kW motor, it shows that, the method on the estimation of induction motor efficiency is effective, and in the normal range of the load, the estimating value and the actual value of test error is less than 3%. And compared to each other, it is found that NSGA-II results are slightly superior to that of the SPEA2. ©, 2015, Chinese Society for Measurement. All right reserved.

Sun G.-Q.,China Jiliang University | Cai H.,China Jiliang University | Niu Z.-J.,Yongji Xinshisu Electrical Equipment CO. | Wang B.-R.,China Jiliang University
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2014

Based on the typical pulse width modulation (PWM) modulation of brushless DC motor (BLDCM), a new PWM switch mode was presented, and to confirm that it can eliminate diode freewheeling of non commutation zone and non conduction phase winding, thereby greatly reducing non commutation torque pulsation. In the commutation torque ripple suppression of BLDCM system, through current analysis of rising and falling of opening phase and closing phase in commutation zone, a ZETA converter in main circuit of inverter was put forward. The ZETA converter eliminates commutation torque ripple based on fixed relationship between DC power supply voltage and the motor back electromotive force (EMF). When BLDCM enter the commutation zone, the ZETA converter supply power to the inverter and power supply voltage to maintain four times in the back EMF. The experimental confirmed that non commutation zone and the commutation torque ripple of BLDCM drive system have been improved. ©, 2014, Editorial Department of Electric Machines and Control. All right reserved.

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