A Three-Phase Transistor Matrix Frequency Converter with an Ultrasparse Topology: Properties and Possible Applications
Maksim KISLYAKOV, K. K. Krutikov, Vyacheslav ROZHKOV, Vladimir FEDOTOV · Elektrichestvo · 2024
This article considers the development of an algorithm for control of a sectionalized matrix frequency converter, which makes it possible to obtain high power performance indicators. The mathematical basis and principles for developing the circuits of three-phase matrix frequency converters featuring better power performance indicators in comparison with the classic topology are presented. An option for implementing a matrix converter in a sectionalized form, which is new for the domestic electrical industry, is proposed. The spatial-vector control method of the converter implemented by means of software makes it possible to increase the converter efficiency to 98% or higher, ensure a sinusoidal waveform of the network source current with a low harmonic distortion factor, and the zero-phase shift of the network current with respect to the corresponding phase voltage. The fundamental approaches to reducing dynamic losses in the matrix converter are outlined. The technology of joint synchronized control of the converter rectifier and inverter sections with switching the rectifier section transistors without losses at zero current is shown. An interactive simulation model of a sectionalized matrix frequency converter based on an ultrasparse topology has been developed. The proposed converter control algorithm has been implemented in the model as an m-file. Converter simulation on a computer has yielded results that confirm high power performance indicators of the sectionalized frequency converter.