A BLDCM Driver Based on High Frequency Link Matrix Converter

High-frequency link technology has the advantages of high power density, high reliability and electrical isolation. With the development of modern power electronic technology, highlighting its potential advantages, the development of new energy electric vehicle technology is also expanding its application field. A kind of brushless DC motor (BLDCM) driver for electric vehicle containing high frequency link, that is, high frequency link matrix converter is studied. Aiming at the character of bidirectional switch in the matrix converter, a new modulation strategy is proposed, namely decoupling modulation approach that based on square wave is suitable for BLDCM a three-phase six-state 120° turn-on mode, and the corresponding waveform logic synthesis is shown. What's more, a thoroughly analysis of the high frequency link converter of BLDCM working modes in the new modulation strategy is given. System simulation and experimental results demonstrate the validity of the novel strategy and the feasibility of high-frequency link matrix converter with a BLDCM.

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