Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Position Sensorless Control of PMSM Drive for Electro-Hydraulic Brake Systems

  • Yoo, Seungjin (Korea Institute of Machinery and Materials) ;
  • Son, Yeongrack (Department of Electrical & Computer Engineering, Seoul National University) ;
  • Ha, Jung-Ik (Department of Electrical & Computer Engineering, Seoul National University) ;
  • Park, Cheol-Gyu (Korea Institute of Industrial Technology) ;
  • You, Seung-Han (School of Mechanical Engineering, Korea University of Technology and Education)
  • Received : 2019.05.07
  • Accepted : 2019.08.11
  • Published : 2019.09.01
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Abstract

This study proposed a fault tolerant control algorithm for electro-hydraulic brake systems where permanent magnet synchronous motor (PMSM) drive is adopted to boost the braking pressure. To cope with motor position sensor faults in the PMSM drive, a braking pressure controller based on an open-loop speed control method for the PMSM was proposed. The magnitude of the current vector was determined from the target braking pressure, and motor rotational speed was derived from the pressure control error to build up the braking pressure. The position offset of the pump piston resulting from a leak in the hydraulic system is also compensated for using the open-loop speed control by moving the piston backward until it is blocked at the end of stroke position. The performance and stability of the proposed controller were experimentally verified. According to the results, the control algorithm can be utilized as an effective means of degraded control for electro-hydraulic brake systems in the case that a motor position sensor fault occurs.

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References

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