吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (3): 711-718.doi: 10.13229/j.cnki.jdxbgxb201503005

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Robust prediction current control of permanent magnet synchronous motor for EPS based disturbance observer

ZHANG Hu, ZHANG Jian-wei, GUO Kong-hui, LI Yang   

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022,China
  • Received:2014-03-13 Online:2015-05-01 Published:2015-05-01

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Abstract: The deadbeat control scheme is adopted to improve the current tracking performance of permanent magnet synchronous motor of electric power steering system. However, the stability and accuracy of traditional deadbeat control suffer from time delay, motor parameter perturbation and other disturbances. To overcome this problem, a prediction current control algorithm based on disturbance observer is proposed. The algorithm combines deadbeat control with a current observer and disturbance observer. The current observer estimates the future value of motor current and compensates the time delay; and the disturbance observer estimates the system disturbance to improve the current observation and control precision. Simulation and experiment results demonstrate that the proposed algorithm significantly improves the steady and dynamic performance of current tracking of the electric power steering system.

Key words: vehicle engineering, predict current control, disturbance observer, permanent magnet synchronous motor, electric power steering

CLC Number: 

  • U463.4
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