Space vector pulse width modulation technique for five-to-three phase direct matrix-converter: Integration of multi-phase generation into existing three-phase grid system

Multiphase generators, generators with several phases higher than three, represents a convenient solution for high power application with compact size limitations. For the same size, the multiphase machine can provide more power density than the three-phase machine. Such a feature puts a multiphase machine as a competitive solution in renewable energy generation, such as wind generation system. This paper suggests using a five-phase generation system without affecting the infrastructure of the three-phase utility grid or existing three-phase loads by using a five-to-three direct matrix converter (DMC). DMC can convert ac voltage into another ac voltage with different magnitude, frequency and a different number of phases. To drive the switches of the DMC a modified Space Vector Pulse Width Modulation (SVPWM) is developed to regulate the frequency and amplitude of output-voltage, besides regulating the input-current to have zero displacement factor with the input voltage. The suggested SVPWM is designed to reduce the number of commutation to reduce the switching losses of the system. The proposed system is simulated with MATLAB/Simulink environment and a hardware prototype is implemented in the laboratory. Results obtained from simulation and experimental prototype demonstrate the proper operation of the whole system.