The development of variable speed AC induction motor drive systems for electric vehicles has been carried out at the University of Canterbury for more than 20 years. A three-phase three-level IGBT inverter has been developed for the University of Canterbury electric vehicle propulsion system. This paper deals with the three-phase three-level inverter switching device selection and inverter construction details. Experimental testing has been undertaken to examine the operating characteristics of the completed three-phase three-level inverter driving one of the electric vehicle motors.
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