Yeongsu Bak, Eunsil Lee, and Kyo-Beum Lee, "An Indirect Matrix Converter for Dual Output AC Drive System With Reduced Number of Power Transistors," in Proc. CENCON Conf., Oct. 2014, pp. 360–364. > Paper

This paper proposes a three-phase input indirect matrix converter topology for a dual ac-drive system with modified switch control

schemes, along with addition of a leg. This topology is developed based on a very sparse matrix converter with addition of a leg in

the inverter stage, which can reduce the amount of power transistors compared to the conventional dual matrix converter system

and; therefore, can achieve the realization of highly compact ac drives. A control strategy for the system, which combines vector

control technology for loads and the space vector pulse width modulation (SVPWM) algorithm for a matrix converter with a four-leg

inverter, is proposed. The proposed control and modulation schemes guarantee sinusoidal input/output waveforms and bidirectional

power flow. Finally, the proposed system and independent control algorithm are verified by simulation using the very sparse matrix ​

converter, which is implemented with 14 IGBT switches and 32 diodes connected to a three-phase and single-phase loads.