Novel PWM Schemes with Multi SVPWM of Sensorless IPMSM Drives for Reducing Current Ripple

Minglei Gu, Satoshi Ogasawara, Masatsugu Takemoto

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


This paper proposes novel pulsewidth modulation (PWM) schemes for multi-space-vector pulsewidth modulation (MSVPWM), which is used in position sensorless control of interior permanent-magnet synchronous motor drives. The estimation of the rotor position is based on magnetic saliency and employs high-frequency components of voltage and current, which are excited by MSVPWM. The difference between the instantaneously applied voltage vector and the reference voltage vector causes current ripple. Since six or four voltage vectors are generated during a PWM period, the sequences of the error voltage vectors lead to different types of current ripples. In this paper, the proposed MSVPWM schemes employ six sequences for zero-/low-speed operation and 24 sequences for high-speed operation to reduce line current ripple. Experimental results confirm that the proposed MSVPWM schemes lead to significant reduction in harmonic current while maintaining high performance of sensorless estimation.

Original languageEnglish
Article number7331661
Pages (from-to)6461-6475
Number of pages15
JournalIEEE Transactions on Power Electronics
Issue number9
Publication statusPublished - Sept 2016
Externally publishedYes


  • Harmonic current
  • interior permanent-magnet synchronous machine (IPMSM)
  • magnetic saliency
  • multi-spacevector pulsewidth modulation (MSVPWM)
  • position estimation
  • sensorless
  • switching sequence

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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