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Based on Extended Kalman Filter Position Sensorless Control for Permanent Magnet Synchronous Motor

Author: LiXiang
Tutor: ChenYiGuang
School: Tianjin University
Course: Motor and electrical
Keywords: Permanent magnet synchronous motors Position sensor control Extended Kalman filter Space voltage vector pulse width modulation
CLC: TM341
Type: Master's thesis
Year: 2004
Downloads: 560
Quote: 5
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Abstract


Permanent magnet synchronous motor (PMSM) is a superior performance , the motor of a broad field of applications , the traditional theory analysis and design method has been more mature . It further promote the application , largely depends on the control strategy . In practice, using a common variable voltage variable frequency (VVVF) inverter drive the damper winding permanent magnet synchronous motor open loop running , sometimes , the operating frequency of the motor exceeds a certain frequency , the system becomes unstable , and even cause the system to lose step. In this paper, the sensorless permanent magnet synchronous motor speed control . The paper presents an extended Kalman filter (EKF) to apply the principles of permanent magnet synchronous motor position sensor governor system . Made a detailed analysis on the mathematical model of the permanent magnet synchronous motor and the principle of Kalman filter , in the application of the extended Kalman filter algorithm the dq rotor synchronous coordinate system , real - time online estimation corner and speed permanent magnet synchronous motor . The selected filtering algorithm simply measuring current and DC bus voltage of the inverter , the motor does not transform the advantages of high reliability and economical and durable . The current double closed loop speed vector control of permanent magnet synchronous motor speed and current estimated online . It also proposed the initial position of the permanent magnet rotor detection method based on the principle of magnetic saturation . Rotor field oriented way and vector control scheme using space vector pulse width modulation method to control the system , this method can be output to any given position of the voltage vector , without increasing the switching frequency of power tubes and not the premise of increasing system complexity . under , and significantly improve the speed performance of the motor . The System Simulation experiments under in Matlab6.5 environment proposed location estimation algorithm and control method has excellent the corner tracking features and speed control performance , at the same time the system has a strong anti- load disturbance performance and better robustness . . The experimental results show that the proposed method to achieve the desired effect .

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