Modulation schemes for five-phase to three-phase AC-AC matrix converters

The AC-AC matrix converters are pulse-width modulated using either a carrier-based or space vector modulation techniques. This paper presents these two approaches as they relate to the non-square 5 × 3 converter design targeted for a five-phase voltage source providing real and active powers for three-phase power systems found in high power applications such as on-board ship power systems. It is desirable to be able to synthesize the three-phase voltages with minimum harmonics and the highest voltage gain possible. Furthermore, the input power factor of the converter is to be variable, even to be unity. These goals are achieved with the determined modulation schemes. Computer simulations are given to validate the analytic modulation methods set forth, to demonstrate the waveform synthesis and the achievement of the unity input power factor.