Study On Matrix Converter Based On 30° Coordinate Conversion

Along with the increasing demand for in the field of energy sources of modern industry and promote the rapid development of power converter.Compared with the common converter,the matrix converter based on 30°coordinate has the advantages of simple structure,strong controllability,high power factor,no large capacity energy storage capacitor,the low harmonic pollution to the grid.So matrix converter is a very promising power converter.so a large number of scholars pay attention to it.For suppressing high order harmonics of input gird side,a LC filter with damping is set up.If we increase the value of resistance,the input higher harmonic will be reduced greatly.Moreover,according to avoid the phenomenon that the filter will bring about a low power factor of input side,a solution base on feedforward bp neural network to offset the deviation of the power factor angle is proposed in this article.At present,the matrix converter has many modulation algorithms,among them the two SVPWM control algorithm is the best widely used of all the converters.Both two SVPWM control strategy and variable frequency are adopted in this paper.Simulation studies on the MC the filter are carried out,input and output waveform of the matrix based on 30 ° coordinate converter is controlled to be sinusoidal wave with less high order harmonics.The correctness of theoretical analysis is verified by this simulation results.In the end,we use DSP chip,FPGA chip and other electric circuits which had designed in this article to build experiment platform of the matrix based on 30 ° coordinate converter.The result verifies the high efficiency and correctness of the above method.