New steps towards a low-cost power electronic building block for matrix converters

This paper analyzes some aspects of integrating the matrix converter bi-directional switches into a power module. The analysis produces two optimal topologies for a power module: one for low-power and another for high-power matrix converters. The configuration of a power electronic building block for matrix converters is proposed. This includes the commutation control logic and the overcurrent protection, provides safe-operation and eliminates the problem of operating with bi-directional switches. A new power module topology for a low power three-phase to three-phase matrix converter is proposed. By using the bootstrap circuits to feed the gate-drivers, the proposed configuration requires only three insulated power supplies. A new input filter topology is proposed, using only two choke cores and providing the size reduction. The experimental results validate the solution by comparing the input current waveforms with the standard configuration. The two proposals constitute a solution recommended in the low power range, where low-cost and low-volume are the main objectives