A Novel Contra-Rotating Power Split Transmission System for Wind Power Generation and Its Dual MPPT Control Strategy

Xiang Luo, Shuangxia Niu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)


This paper proposes a new brushless contra-rotating power split transmission (CR-PST) system for the direct-drive wind power generation. The core element of this system is a doubly fed dual-rotor flux-modulation permanent magnet machine, which has two contra-rotating rotors connected with two wind blades to absorb the wind energy, and two sets of stator windings to realize torque split between the two shafts. This proposed CR-PST system has compact structure and bidirectional flux-modulation design, as well as increased wind power conversion efficiency. Compared with the conventional wind turbine system, which can only work with single maximum power point tracking (MPPT) control strategy, the proposed CR-PST system can collect increased wind energy with dual MPPT method for the given wind speed. Time-stepping finite-element method is used to analyze the steady and dynamic performance of the proposed system and the control strategy is verified by experiments and simulation results.
Original languageEnglish
Article number7744627
Pages (from-to)6924-6935
Number of pages12
JournalIEEE Transactions on Power Electronics
Issue number9
Publication statusPublished - 1 Sep 2017


  • Contra-rotating
  • dual-rotor machine
  • magnetic flux modulation
  • maximum power point tracking (MPPT) control
  • power split
  • wind power generator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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