Development of Matrix Converter for Two-phase Induction Motor Drives

Abstract

This project presents the implementation and testing of a single phase ac-ac matrix converter using 4-units of bidirectional IGBT-power diodes as main power switching devices. The converter can directly convert the utility 1-phase sinusoidal supply voltage into a variable voltage of variable PWM pattern by adjusting the switching frequency of the control signal and modulation index of the PWM control signal. The modulation indexes are 0.2, 0.4, 0.6, 0.8, and 1.0. The output voltages are 12.5 Hz, 25 Hz, 50 Hz, and 100 Hz. The number of pulses are 3 and 5 per half cycle. The resistor load is 500 W. The resistor series with inductor load are 100 W and 1.0021 Henry. Waveforms of input and output voltage and current of the matrix converter for a given test load are observed. Moreover, the input and output power are measured. The maximum efficiency is 96%.