Research on Direct Coordinate Vector Modulation Strategy for Matrix-Converter-Based Transforms

To address the issues of high computational complexity and harmonic content associated with Indirect Space Vector Modulation (ISVM) strategy in matrix-converter-based transforms, this paper proposes a Direct Coordinate Vector Modulation (DCVM) strategy based on geometric area calculation. The proposed strategy represents the system input and output voltages in the form of vector coordinates, and converts duty-cycle calculations into triangle area ratio calculations. Unlike traditional modulation strategies, this strategy does not require the introduction of angles and trigonometric functions in duty-cycle calculations, reducing computational complexity. Moreover, the proposed strategy only requires six commutations per modulation cycle, effectively reducing switching losses and improving waveform quality. A simulation model based on Matlab/Simulink is used to compare the proposed strategy with ISVM strategy, verifying that the proposed strategy has the characteristics of fast response and high waveform quality. Finally, experimental results further confirm the feasibility of the DCVM strategy.