The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Position Control Scheme of Rail Traction System Based on the BLAC Motor With Disturbance Observer

외란 관측기 기반의 BLAC 전동기로 구동하는 레일 트랙션 시스템의 위치 제어

  • Cho, Kiwan (Dept. of Mechatronics Engineering, Kyungsung University) ;
  • Lee, Dong-Hee (Dept. of Mechatronics Engineering, Kyungsung University)
  • Received : 2020.11.21
  • Accepted : 2021.01.17
  • Published : 2021.04.20
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Abstract

This study presents an overhang-type rail traction system using dual brushless AC (BLAC) motors with hall sensors. For an accurate position and moving length control of the designed rail traction system, instantaneous position controller using speed reference model and modified disturbance observer for BLAC motor with hall sensor are proposed. The presented speed reference model is designed to satisfy the required performance of 200 mm/s with proper acceleration and deceleration slopes to reduce mechanical vibration. Through the instantaneous speed reference model, instantaneous position and speed errors can be compensated together. Furthermore, the modified disturbance observer for BLAC motors with low-resolution hall sensors can improve the torque and speed control performance. The proposed disturbance observer is based on an actual motor speed. However, the feedback speed information of the hall sensor is not enough for use in the low-speed region. The practical adopted disturbance observer uses an activation speed band to the actual torque controller of the designed rail traction system. The proposed position control scheme is verified by the MATLAB-Simulink model and a practical manufactured traction system. In the computer simulation and experiments, the proposed position control scheme shows advanced control performance.

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References

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