Improved Switching Performance in T Type Inverters for High Voltage Induction Motor Application

Recent years, Inverters have played a vital role in industrial drive control applications such as electrical DC-AC energy conversion, motor speed control etc. An increase in switching frequency of the inverter increases the quality of power. However, the increase in switching frequency beyond 3000 V results in high heat loss across semiconductor switches of the inverter. Several researchers have developed various inverter topologies for high voltage and switching frequency applications. In this work, a three level T-Type inverter fed induction motor is designed and developed with improved switching for high voltage applications. Further, the hardware prototype of a three level T-Type inverter is tested for induction motor application to find the performance of the proposed design. The proposed three-level T-Type bridge is simulated, and the experimental and simulation results are compared. Results demonstrate that the proposed three level T-Type inverter for high voltage application has better efficiency than conventional converters.