Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Pressure Control of SR Driven Hydraulic Oil-Pump Using Data based PID Controller

  • Lee, Dong-Hee (Dept. of Electrical and Mechatronics Eng., Kyungsung University) ;
  • Kim, Tae-Hyoung (Dept. of Electrical and Mechatronics Eng., Kyungsung University) ;
  • Ahn, Jin-Woo (Dept. of Electrical and Mechatronics Eng., Kyungsung University)
  • Published : 2009.09.20
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Abstract

This paper presents a practical method of pressure control for a hydraulic oil-pump system using an SR (Switched Reluctance) drive. For a 6Mpa grade hydraulic oil-pump, a 2.6kW SR drive is developed. In order to get high performance pressure dynamics in actual applications, a data based PID control scheme is proposed. The look-up table from a pre-measured data base produces an approximate current reference based on motor speed and oil-pressure. A PID controller can compensate for the pressure error. With the combination of the two references, the proposed control scheme can achieve fast dynamics and stable operation. Furthermore, a suitable current controller considering the nonlinear characteristics of an SRM (Switched Reluctance Motor) and practical test methods for data measuring are presented. The proposed control scheme is verified by experimental tests.

Keywords

References

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