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Differential Evolution Approach for Performance Enhancement of Field-Oriented PMSMs

  • Yun, Hong Min ;
  • Kim, Yong ;
  • Choi, Han Ho
  • Received : 2018.03.26
  • Accepted : 2018.06.23
  • Published : 2018.11.01

Abstract

In a field-oriented vector-controlled permanent magnet synchronous motor (PMSM) control system, the d-axis current control loop can offer a free degree of freedom which can be used to improve control performances. However, in the industry the desired d-axis current command is usually set as zero without using the free degree of freedom. This paper proposes a method to use the degree of freedom for control performance improvement. It is assumed that both the inner loop proportional-integral (PI) current controller and the q-axis outer loop PI speed controller are tuned by the well-known tuning rules. This paper gives an optimal d-axis reference current command generator such that some useful performance indexes are minimized and/or a tradeoff between conflicting performance criteria is made. This paper uses a differential evolution algorithm to autotune the parameter values of the optimal d-axis reference current command generator. This paper implements the proposed control system in real time on a Texas Instruments TMS320F28335 floating-point DSP. This paper also gives experimental results showing the practicality and feasibility of the proposed control system, along with simulation results.

Keywords

Permanent magnet synchronous motor (PMSM);Field-oriented control;Speed control;Proportional-integral (PI) control;Differential evolution (DE)

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Acknowledgement

Supported by : National Research Foundation of Korea (NRF), Korea Institute of Energy Technology Evaluation and Planning(KETEP)