Loss analysis and design method for high efficiency matrix converter

This paper discusses loss analysis formulas to achieve high efficiency and high power density for matrix converter. In this paper, the conduction loss and the switching loss of the matrix converter are derived theoretically based on virtual AC-DC-AC control method. Then, the validity of the equations is confirmed in simulation and experiment. From the experimental results, the maximum efficiency is 97.9% with 2-phase modulation at rated power (Devices: MOSFET R6046FNZ). In addition, it is confirmed that the total loss error between the calculation and experimental result is 8.65%. Finally, the relationship between the efficiency and power density is discussed by a pareto front curve. The power density is calculated from the volume of the switching device, heat-sink, input inductor and filter capacitor. As the result, the efficiency and maximum power density in the matrix converter are 97.0% and 9.7 kW/dm³ when the switching frequency is set to 85 kHz.