Power Loss Reduction in PWM Inverters of Induction Motor Drives Based on Soft Switching Technique

Abstract

Performance of the systems equipped with PWM inverters can be improved through increasing frequency of switching. However, frequency improvement made some troubles in the system such as electromagnetic interactions or interferences (EMI) and increased power loss. Generally in the inverters working based on PWM method, the losses of switching are so high, where the load is induction. But, in the presented method, it is possible to minimize the switching losses. In this investigation, by adding Snubber circuit in the driver circuit, switching losses significantly reduced. The results obtained from simulation showed that soft switching inverter is more efficient than hard switching inverter in terms of reduction of switching losses.