DAB based Three Phase Boost Inverter for Higher Power Applications

Abstract

This thesis describes of DAB-based boost inverter. Induction heating, defence equipment, electric motor speed control, grid-connected and standalone inverters, uninterruptible power supplies, and dual active bridge (DAB) converter-based three-phase boost inverters are all included in the scope of this study. Switching losses in high-frequency converters are considerable when the switching frequency is increased. The novel design and management of DAB-based boost inverter with modified switching techniques are presented in this thesis. This design utilises the latter to accomplish isolation without the need for rectification on the secondary side of the high frequency transformer (HFT). As a result of the elimination of switching losses, the input balancing capacitors of the diode clamped multilevel inverter are reduced, resulting in an overall improvement in performance and efficiency. The primary component of the proposed topology is an H-bridge inverter, while the secondary side of the HFT is a modified topology. The output voltage can be attained by utilising the gate pulse that sine pulse width modulation (SPWM) generates. The secondary side bridge receives power from the primary side bridge through HFT. Using power from a photovoltaic (PV) system, a direct-current (DC) boost converter (DAB) converts low-voltage (LV) power into high-voltage (HV) power in accordance with the HFT's turns ratio. The inverter subsequently receives HVAC power, which, after passing through an LC filter, generates 200V at 400 Hz. A three-phase voltage-fed inverter has been designed and implemented using a Sic MOSFET module. The validation of a novel three-phase inverter architecture was achieved by simulating its main circuit operation and the control mechanism of the power supply unit, and subsequently implementing the analysis using a prototype.