This paper presents a bi-directional AC-DC matrix converter for the power supply systems of hybrid electric vehicles. Compared to conventional PWM rectifier and associated DC-DC converter, large DC bus capacitor banks are eliminated. The converter converts three-phase AC power into the desired DC output with higher energy density via a single power stage. A closed-loop control strategy based on indirect space vector modulation is proposed and the validity has been verified. The strategy ensures that the output voltage can be regulated tightly against different loads and wide input variation and high-quality input current can be achieved.
- closed-loop control
- indirect space vector modulation
- matrix converter