Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Model-free PZC filter-based multi-loop speed controller for servo drives

  • Hee‑Sung Lim (Graduate School of Electrical and Computer Engineering, Ajou University) ;
  • Seok‑Kyoon Kim (Department of Creative Convergence Engineering, Hanbat National University) ;
  • Kyo‑Beum Lee (Department of Electrical and Computer Engineering, Ajou University)
  • Received : 2023.12.22
  • Accepted : 2024.05.21
  • Published : 2024.08.20
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Abstract

This paper derives an advanced multi-loop speed feedback system equipped with model-free pole-zero cancellation (PZC) filters for the position and current measurements of servo drives. The proposed feedback system does not necessitate an exact system model, and it renders the transfer function of each loop in a first-order low-pass filter form by involving active damping terms. Furthermore, the PZC filters output the desired speed and current information for each of the loops along the first-order convergent system, independent of the system model. An experimental platform involving a 500 W brushless DC motor, with a digital signal processor as a controller, validates the practical improvement of the proposed feedback system.

Keywords

Acknowledgement

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20225500000110).

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