Abstract
A multiphase matrix converter (MC) is a direct AC/AC converter with n-phase input and m-phase output that is required to supply multiphase systems. To synthesize the controllable sinusoidal output voltage and input current with controllable displacement angle, the pulse width modulation (PWM) is implemented. On account of the PWM usage, there is common mode voltage (CMV), which is detrimental and causes lots of failures. This paper investigates the CMV elimination in the three-to-nine-phase MC. The carrier-based space vector modulation (SVM) with Venturini modulation functions is used. The elimination of the CMV is realized by applying rotating voltage space vectors only. The simulation results presented in this study show that the CMV is entirely eliminated and prove the usefulness of the proposed modulation method.
Highlights
Matrix converters (MCs) have appeared as promising AC/AC converters using direct conversion.The topology is based on semiconductor switches with minimal requirements for passive components.In a matrix of bidirectional switches, any input phase can be connected to any output phase
The output voltage of the three-to-nine-phase MC can be represented by usage of space vectors
For confirmation of theoretical and analytical investigations, the simulations of analyzed converter were performed using the three-to-nine-phase MC model prepared in ATP software
Summary
Matrix converters (MCs) have appeared as promising AC/AC converters using direct conversion. The method of eliminating CMV in the MC by using rotating voltage space vectors has been investigated and presented for the first time by authors of [22,23,24,25]. In turn in paper [30], the authors propose to use three rotating voltage space vectors without complicated trigonometric operation, which simplifies the modulation method providing elimination of the CMV as in the previous method. Application of the three rotating voltage space vectors causes that in the presented method, the input displacement angle cannot be controlled Both modulation methods described in [29,30] are applied to the three-to-three-phase MC. Energies 2019, 12, x FOR PEER REVIEW simulation results and output voltage space vectors selected to eliminate the CMV, are presented in the paper
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