An industrial optimum current control scheme for IM drive fed by Ultra Sparse Z-source Matrix Converter under abnormal input voltage

This paper illustrates an induction motor (IM) fed by an Ultra Sparse Z-source Matrix Converter (USZSMC) under 40% abnormal rate of input voltage, which reduces the THD of the output current by applying the intelligent method in the Particle Swarm Optimization (PSO) PI controller. The practical topology of matrix converter has been improved by using only 9 semiconductor switches and 18 diodes. A Z-source network has been placed at virtual DC-link in order to boost up the voltage transfer ratio with the least number of passive elements. By applying any changes in reference current or frequency, the modulation index can be automatically adjusted and respond to changes without additional optimization or heavy computational requirements in the system. This advantage provides a simple, yet very cost effective and efficient system that can meet the requirements for industry. The concentration of this research is on having a compact, light system with ability to meet the standards for industrial use with no extensive computing time. The promising simulation results have been presented to prove the validity of proposed method.