A Unified PWM Strategy to Reduce Minimum Switching Number for Matrix Converters

From several PWM methods with minimum switching numbers, this paper proposes a unified PWM strategy to reduce the minimum switching number for matrix converters. In this paper, the carrier-based dipolar modulation and general solution of modulation matrix are used to generate the PWM signals which encompass all well-known PWM with 6 BSOs. The research results reveal that a unified PWM strategy can be done. The space-vector modulation, which is a complex and intensive calculation can be realized easily using the proposed PWM method.