吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (5): 1527-1534.doi: 10.13229/j.cnki.jdxbgxb201505022

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Novel observer design of permanent magnet synchronous motor for electric vehicles

ZHANG Yong-bo1, 2, YI Bo-yu1, KANG Long-yun1   

  1. 1.School of Mechanical and Automobile Engineering, South China University of Technology, Guangzhou 510640, China;
    2.College of Engineering,South China Agriculture University,Guangzhou 510642,China
  • Received:2014-03-04 Online:2015-09-01 Published:2015-09-01

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Abstract: The conventional sensorless algorithm for electric vehicle based on Extended Kalman Filter (EKF) can be influenced by the error of the rotor flux and shows considerable steady-state speed and position deviations. To take rotor flux as a variable in the EKF may increase the order of the operational matrix and the computation load of the real system. To solve this problem and still keep the advantage of the original algorithm, a novel Kalman control strategy using Nonlinear Two-stage EKF (NTSEKF) is proposed. The main idea is to decouple the Kalman filter into two parallel low order filters using coordinate transformation. In theory, the total number of multiplication and addition operations for EKF and NTSEKF is calculated respectively. Simulation and experimental results show that the novel strategy can reduce the number of arithmetic operations compared to EKF meanwhile still keep good identification performance.

Key words: automatic control technology, sensorless control, rotor flux, nonlinear two-stage extended Kalman filter

CLC Number: 

  • TP29
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