A Novel Pulse Width Modulation Strategy Based on Circuit-Level Decoupling for Vienna Rectifier

In this paper, a novel pulse width modulation strategy based on circuit level decoupling concept is presented for Vienna rectifier as an alternative of conventional discontinuous modulation methods. Based on the proposed strategy, the Vienna rectifier can be decoupled into two two-level boost converters in every defined operating section, and though the controller design will be simplified. Moreover, compared to conventional continuous PWM methods, the proposed scheme, can also results in reduction of the switching loss by one third at the same switching frequencies. In this paper, the software implementation of the control technique has been carried out on Vienna rectifier under 882w output power and10 KHz switching frequency. The simulation results prove the effectiveness of the proposed method over other continuous and discontinuous modulation schemes, in terms of loss reduction and reduced complexity in control structure.