Abstract:
In this paper, a three-phase matrix-based AC to
DC power converter is presented considering all the practical
implementation aspects for battery charging applications. Unlike
some of the matrix-based proposal in the literature, the proposed
converter uses only six gate drivers for converting three-phase
AC to medium-frequency AC, which is then stepped down
and rectified to an appropriate voltage for battery interface.
Managing energy stored in transformer’s leakage inductor is
often a problem while utilizing single driver per matrix switch.
An additional short-circuit leg is proposed to circulate the stored
energy during zero vector periods of the proposed converter,
thereby ensuring continuous path for the leakage energy. The
analysis and design of the proposed converter is validated on a
2 kW experimental prototype and test results are presented for
validation.
