MATHEMATICAL SIMULATION OF FREQUENCY CONVERTER WITH SPACE VECTOR PULSE WIDTH MODULATION

The article presents the stages of developing and building a mathematical model for a semi-conductor frequency converter with space vector pulse width modulation, which consists of a power circuit made of power semiconductor elements. The mathematical simulation is performed in the MATLAB/Simulink soft-ware environment. The main principles of the model’s components performance are formulated. Using switching diagrams, calculated data for building a functional management system for the power keys of a frequency con-verter are presented. Based on the simulation results, oscillography records of phase and linear load voltages are obtained. Dependences of output voltage quality on the frequency of pulse width modulation are identified. The main advantages of using space vector pulse width modulation are described in designing sinusoids of output voltage in a frequency converter when working with an active inductive load. The authors draw conclusions on the usage of the vector method for building an output voltage of a frequency converter in the industry.