Model Predictive Control of Direct Matrix Converter with Common Mode Voltage Elimination

Abstract

Common-mode-voltage (CMV) is known for creating electromagnetic interference and bearing currents in industrial drive applications. This problem is exacerbated in mobile applications, due to the use of long cables carrying supply and protective earth conductors. In such applications matrix converters are seen as a potential drive solution. This paper presents a detailed study showing the possibility to completely eliminate CMV in the matrix converter based system, using voltage control based model predictive control (MPC). The paper compares performance of the direct matrix converter (DMC) for different output frequencies, under the imposed condition of zero CMV. The paper also presents a systematical discretization method, which is used to accurately calculate the input filter constants. Based on extensive simulations performed in MATLAB-Simulink environment, the paper demonstrates suitability of DMC based drives for CMV-sensitive applications.