Voltage transfer ratio improvement of an Indirect Matrix Converter by Single pulse modulation

This paper proposes two over modulation strategies for the Indirect Matrix Converter (IMC). These strategies aim to improve the output-input voltage transfer ratio of the converter and also maintain high efficiency. This paper will discuss the control method of the two modulations and also compare the total losses of the converter. The control method uses a triangular carrier comparison method which is a simple structure based on the concept of a non-linear amplitude control of a voltage source inverter (VSI) output voltage. The validity of the proposed method will be demonstrated with the simulation results and the experimental results. Loss analyses are included in the paper to evaluate the efficiency of the two proposed methods. Furthermore, a 1 kW prototype was tested and efficiency of 93.5% is obtained.