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A Sensorless Rotor Position Detection Method for Permanent Synchronous Motors Based on High-Frequency Square Wave

Anran Song1,2, Zilong Feng2,3, Bo Huang2,3

  • 1School of Mechanical and Electrical Engineering, Suqian University, Suqian 223800, China.

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Summary
This summary is machine-generated.

This study introduces a harmonic voltage compensation strategy using a sixth-order quasi-proportional resonant (QPR) controller to reduce torque ripple and speed fluctuations in interior permanent magnet synchronous motors (IPMSM) sensorless control.

Keywords:
IPMSMharmonic voltage compensationhigh-frequency square-wave injectionmultiple coordinate systemssixth-order quasi-proportional resonant

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Area of Science:

  • Electrical Engineering
  • Control Systems
  • Motor Drives

Background:

  • Sensorless control of interior permanent magnet synchronous motors (IPMSM) faces challenges from low-order stator current harmonics.
  • Torque ripple and speed fluctuations are significant issues in IPMSM control systems.

Purpose of the Study:

  • To propose and validate a harmonic voltage compensation strategy for IPMSM sensorless control.
  • To suppress fifth and seventh stator current harmonics causing performance degradation.

Main Methods:

  • A sixth-order quasi-proportional resonant (QPR) controller is proposed for harmonic voltage compensation.
  • Harmonic current extraction using multiple synchronous reference frame transformations.
  • Targeted compensation voltage generation and parallel connection with PI controllers.

Main Results:

  • Significant suppression of stator current distortion.
  • Effective reduction in torque and speed ripples.
  • Substantial improvement in rotor position estimation accuracy.

Conclusions:

  • The proposed harmonic voltage compensation strategy enhances IPMSM sensorless control performance.
  • The sixth-order QPR controller effectively mitigates harmonic disturbances.
  • The novel strategy offers superior performance compared to conventional methods.