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Pseudo-Random-Frequency Signal Injection for Acoustic Reduction

  • Gaolin Wang
  • Guoqiang Zhang
  • Dianguo Xu
Chapter

Abstract

HF signal injection method can obtain the rotor position accurately by tracking the rotor saliency at low and zero speed. However, this method arouses the high-frequency component in the induced current, causing audible noise and electromagnetic interference (EMI) problems. The audible noise generated by injected HF signals is uncomfortable to hear, which inevitably restricts the implementation of this kind of sensorless control scheme in industrial and household applications. Adopting the idea of noise reduction in power converters, random HF signal injection method is a good way for noise suppression.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Gaolin Wang
    • 1
  • Guoqiang Zhang
    • 1
  • Dianguo Xu
    • 1
  1. 1.Harbin Institute of TechnologyHarbinChina

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