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The Research on Digital Control System of Permanent Magnet Synchronization Motor

Author: ZhangTieJun
Tutor: HuangShouDao
School: Hunan University
Course: Motor and electrical
Keywords: PMSM Vector control flux -Weaken control Direct Torque Control Digital Signal Processor
CLC: TM341
Type: Master's thesis
Year: 2006
Downloads: 359
Quote: 2
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Abstract


PMSM has the advantage of smaller volume, higher efficiency and power density over the induction motor. Therefore the research on PMSM has entered a new stage since the 1980’s with the improvement of ratio between the performance and the price of the PM material and the development of the power electronics devices.The paper originates from the PMSM itself, the math model of PMSM was deduced and obtained, and the torque character of PMSM, power character and efficiency were analyzed. Details of the Vector Control(VC) of PMSM is presented in the paper, and the analysis of several circuit control strategies of VC theory applied to the PMSM control, which include the i_d= 0 control, cosφ = 1 control and the max torque/current control. A complete digital PMSM VC system based on DSP is developed with the soft and hard ware design plans given. The paper discusses the theory of weaken flux speed control of PMSM and the reason why the weaken flux speed extending is difficult, and then brings out the stator current optimum control strategy. Direct torque control (DTC) theory is another advanced control theory after VC theory in the speed control field. The application of DTC theory on PMSM is discussed and a new strategy is proposed, which is based on SVPWM, the simulation results show perfect dynamic performance, minor static error and good robustness characteristic.

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Synchronous motor
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