Independent current control of dual parallel SRM drive using a public current sensor

Chun Gan, Jianhua Wu, Ning Wang, Yihua Hu, Wenping Cao, Shiyou Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Switched reluctance motors (SRMs) have been considered a potential candidate for automotive applications due to its rare-earth-free feature and wide speed range. Conventionally, a current sensor is installed in each phase for the current regulation control, which will considerably add the cost and volume to multimotor drives. This paper proposes an independent current control technique for dual parallel SRM drives using only one current sensor. In order to identify the individual motor currents from the public current, a pulse injection scheme is developed accordingly. Two pulses are individually injected into the lower transistors of the dual converter in the excitation regions and the fixed current sampling points triggered by the injected pulse are presented for motor current identification. The independent current control for the dual SRM can be directly implemented by the public current sensing, although the motor parameters are different. The developed system requires only one current sensor without additional hardware or reduced system performance. The simulation and experimental results on parallel 750 W and 150 W three-phase 12/8 SRM drives are presented to confirm the effectiveness of the proposed method. With this scheme, the dual-motor drive can be more compact and cost effective for traction drive applications.

Original languageEnglish
Pages (from-to)392-401
Number of pages10
JournalIEEE/ASME Transactions on Mechatronics
Volume22
Issue number1
Early online date19 Jul 2016
DOIs
Publication statusPublished - Feb 2017

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Keywords

  • current sampling
  • dual-motor drive
  • independent current control
  • public current sensor
  • pulse injection
  • switched reluctance motors (SRMs)

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