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Zhang X.-L.,Xuzhou Institute of Technology | Zhang X.-L.,Jiangsu Engineering Research Center for Electrical Drive and Control | Cao Y.-J.,Xuzhou Institute of Technology | Shao X.-G.,Xuzhou Institute of Technology
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2015

For the purpose of resolving modeling difficulties of switched reluctance motor (SRM), brought by nonlinear characteristics, flux linkage characteristics on-line modeling of high power SRM was studied. On the basis of analyzing boundary constraints RBF neural network topology structure and learning algorithm, flux linkage characteristics on-line modeling method based on DSP was proposed. On-line modeling experiment platform of SRM was set up. Experiment results of 18.5 kW and 132 kW SRM show that the method can realize flux linkage characteristics on-line modeling under different power rating, the modeling error is less than 0.01Wb. The proposed method obtained original data by speed open-loop constant current on-line detection method, does not need additional hardware testing equipment and is feasible and portable for SRM modeling which provides an easy way to implement it. ©, 2015, Editorial Department of Electric Machines and Control. All right reserved. Source


Cao H.,China University of Mining and Technology | Cao H.,Jiangsu Engineering Research Center for Electrical Drive and Control | Jiang Z.,China University of Mining and Technology | Shen J.,China University of Mining and Technology | Li B.,China University of Mining and Technology
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2016

The high-frequency model of the various parts and the specific common mode conducted interference transmission path of the high power three-level dual frequency control system are studied. First the high-frequency models of common mode interference sources, DC busbars, cables, and induction motor are established respectively and the common mode conducted interference transmission path is analyzed in detail. Then Matlab is used to simulate the high-frequency model of the frequency control system, and the experimental platform within the engineering center is used to complete the relevant test. The correctness of the theoretical analysis and the models is verified by the results of the simulation and experiment. Finally a filter is designed to significantly suppress the interference. © 2016, The editorial office of Transaction of China Electrotechnical Society. All right reserved. Source


Wu X.-Q.,China University of Mining and Technology | Wu X.-Q.,Jiangsu Engineering Research Center for Electrical Drive and Control | Tan G.-J.,China University of Mining and Technology | Tan G.-J.,Jiangsu Engineering Research Center for Electrical Drive and Control | And 2 more authors.
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2011

The accurate observer and effective control of the stator flux has significant sense to the performance improvement of DC-excited synchronous motor direct torque control system. For pure integrator voltage model exist deviation of observed flux, a stator flux observer based on the sum of flux amplitude squares correction method is proposed. Appling the simplified three-level space vector pulse width modulation (SVPWM) algorithm to direct torque control (DTC) system, it achieved the accurate compensation for the torque and flux linkage error. Furthermore, a method of voltage estimate at the three-level power inverter was advanced based on the simplified SVPWM strategy. Experiment results demonstrate that the DC-excited synchronous motor direct torque controlled-space vector modulation (DTC-SVM) control system based on the proposed improved stator flux observer has excellent control property. Source


Jing W.,China University of Mining and Technology | Jing W.,Jiangsu Engineering Research Center for Electrical Drive and Control | Tan G.-J.,China University of Mining and Technology | Tan G.-J.,Jiangsu Engineering Research Center for Electrical Drive and Control | And 2 more authors.
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2010

Traditional linear magnetic circuit model of salient-pole synchronous motor(SM) can hardly depict the motor's static and dynamic characteristics accurately, and magnetic saturation affects the performance of SM control system severely. This paper presented a nonlinear model which took saturation effect into consideration. Cross saturation phenomenon was firstly demonstrated and then three different inductances, i.e. static saturation inductance, dynamic saturation inductance and cross saturation inductance were used to characterize nonlinear magnetic phenomenon. Based on these processes the nonlinear saturation model of silent pole SM was established as well as its state-space equations. Vector control strategy was utilized to analyze the saturated model. Simulation results indicate that the excitation current responses well to the saturation degree to establish the flux in the motor, the d/q axis currents and load angle act in accordance with motor operating principles under saturated magnetic situation; thus the validity of the model is verified. Source


Jing W.,China University of Mining and Technology | Jing W.,Jiangsu Engineering Research Center for Electrical Drive and Control | Tan G.,China University of Mining and Technology | Tan G.,Jiangsu Engineering Research Center for Electrical Drive and Control | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2011

Paralleled two-level converters are widely used in low-voltage permanent magnet direct-drive wind power generation systems, while three-level converters are more suitable in medium-voltage systems. The output performances and power losses are compared between two-level and three-level converters in permanent magnet direct-drive wind power generation systems. Loss models of power device and filtering inductance are established for evaluating the power losses of the converters. Based on the operating principle of two-level and three-level converters, a practical loss calculation method is derived. Simulation and experiment results show that, comparing with two-level converter, the three-level one features lower grid-side current harmonic components and less power losses. © 2011 State Grid Electric Power Research Institute Press. Source

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