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Proportional-type robust current controller under variable bandwidth technique for permanent magnet synchronous

Hyoseo Choi1, Jae Kyung Park2, Seok-Kyoon Kim3,4

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|November 23, 2024
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Summary

This study introduces a robust current controller for permanent magnet synchronous motors (PMSMs). It enhances transient performance and eliminates steady-state errors using an online auto-tuner and disturbance observer.

Keywords:
Auto-tunerCurrent controlDisturbance observerParameter uncertaintyPermanent magnet synchronous motors

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Area of Science:

  • Electrical Engineering
  • Control Systems
  • Robotics

Background:

  • Permanent magnet synchronous motors (PMSMs) are crucial in modern electric drives.
  • Accurate current control is essential for PMSM performance.
  • Traditional controllers often struggle with transient response and steady-state errors.

Purpose of the Study:

  • To develop a robust current controller for PMSMs.
  • To improve transient current tracking performance.
  • To ensure steady-state error rejection without integral action.

Main Methods:

  • Implementation of a proportional-type robust current controller.
  • Integration of a variable bandwidth technique via an online auto-tuner.
  • Utilization of a disturbance observer (DOB) as a subsystem.

Main Results:

  • The online auto-tuner successfully implemented variable bandwidth, boosting transient performance.
  • The combination of proportional feedback and DOB eliminated the need for integral action.
  • The proposed controller achieved target current tracking performance without steady-state errors.

Conclusions:

  • The developed controller offers robust and accurate current control for PMSMs.
  • The variable bandwidth technique and DOB effectively address performance limitations.
  • Experimental validation confirms the controller's efficacy on a prototype PMSM.