A Single Carrier-Based Pulsewidth Modulation Technique for Three-to-Three Phase Indirect Matrix Converter

In this article, a new carrier-based pulsewidth modulation (CBPWM) technique is presented for three-to-three phase indirect matrix converter (IMC). The main feature of this technique is the use of single triangular carrier to obtain the switching signals for both converter stages of the IMC. Simplified modulation equations calculated independently from the sector judgements and space vector pulsewidth modulation (SVPWM) technique are proposed for the bidirectional rectifier and inverter stages of the IMC. As a result, the presented CBPWM technique is implemented easily with the reduced complexity as compared to the conventional single carrier-based CBPWM techniques developed based on the SVPWM technique. This new technique features all the benefits associated with the conventional CBPWM techniques of the IMC, i.e., sinusoidal input/output waveforms, voltage transfer ratio of 0.866 and generation of the switching signals independent of the lookup tables. The simulation model of the IMC is developed in the PSIM environment to verify the performance of the proposed CBPWM technique. The laboratory prototype for the IMC is developed based on the proposed scheme using the DSP and FPGA devices. The experimental results are included to support the simulation results.