The study of the operation modes and control strategies of an advanced electromechanical converter for automobiles

Yuan Cheng, Shumei Cui, Liwei Song, C. C. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

66 Citations (Scopus)


To enhance the performance of hybrid electric vehicle and continuously variable transmission, and to achieve more varied operation modes, a novel breed of integrated electromechanical converter is presented, such as electrical variable transmission (EVT) and four-quadrant transducer. Synthesizing two electric machines, they are essentially electromagnetic theory-based converters with the function of speed, torque, and energy regulation. The feature of flexible and variable control makes them very suitable for use in automobiles, especially in hybrid electric vehicles, as a continuously variable transmission and integrated starter and generator. Furthermore, the operation of the internal combustion engine is optimized, and the reduction of fuel consumption and the improvement of vehicle performance are also achieved. Corresponding to different road loads and driver demands, several operating states and control strategies are possible. Based on a simplified structure, the mathematical model of the EVT has been built, and its power flow and control strategies under different operation modes, are also analyzed.

Original languageEnglish
Pages (from-to)430-433
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number1
Publication statusPublished - Jan 2007
Externally publishedYes


  • Continuously variable transmission
  • Control strategy
  • Electric machine
  • Hybrid electric vehicle
  • Starter and generator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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