Reduced Power Components based Hybrid Multi-Level with Optimization Strategy to Prevent Drive Motor Heating by Elimination of Lower Order Harmonic

Conventional drive converters have the drawbacks of a huge number of power component counts, high circuit complexity, high switching losses and so on. Motivated by these issues, a reduced power components-based asymmetric hybrid inverter is presented for medium voltage drive applications. Here, an eleven steps inverter is configured with 10-power switch and 3- DC source. Due to the utilization of selective harmonic elimination, most power switches are turned on and off at a low and fundamental frequency, which will significantly reduce losses and enhance the converter efficiency. Apart from this, the 54-pulse is designed to maintain DC-link voltage and feed input power to the presented eleven-level inverter. Apart from this, the presented drive end eleven level DC-AC and grid side fifty-four pulse AC-DC converters are used to mitigate lower order harmonic at the motor terminal currents/voltages and grid currents, respectively. The drive circuit design details, operational modes and fundamental switching scheme are described in detail. The simulation results are demonstrated to validate the effectiveness and feasibility of this presented drive system.