PWM Modulation Strategy of Three-phase AC-AC Power Converters Based on Sparse Indirect Matrix Converter

This paper presents a Sparse Indirect Matrix Converter (SIMC) topology, which can be proposed as an alternative to the direct matrix converter. This double stage converter configuration consists of a combination of two conventional converters through a fictitious intermediate floor without capacitive storage element. The first floor is a controlled rectifier directly connected to a second floor, which consists of a voltage source inverter traditionally used in many different industrial applications. Pulse Width Modulation (PWM) control strategy of matrix converters is aimed to generate the gate signals that guarantee the control of the semi-conductors in good conditions. It provides balanced output voltages with controllable frequency, a maximum value of the ratio and a displacement factor near unity regardless the load.