High Gain Non-Isolated Step-Up Dc-Dc Converter Based CSI Fed BIDC Drive for Air-Vehicle Environment Control System (ECS)

Abstract

In this paper, a high gain non- isolated step up DC -DC converter is proposed for air-vehicle environment control system (ECS)  powered by BLDC motor .Traditional BLDC drives use Voltage Source Inverter (VSI) that utilize hard switching, thereby generating switching losses and entail the use of large heat sinks. VSI needs a huge dc link capacitor that is inherently unreliable and is one of the most expensive components of drive. Hence, a Current Source Inverter (CSI) is used to replace the hard switching by soft switching; thereby eliminating the heat sinks as well as the large dc link capacitor. On the other hand, motors powered by batteries uses conventional boost converter which increases voltage level with certain limitations. Using interleaving technique the current ripple at the input can be reduced and with suitable voltage magnitude compensators (VMC) the voltage gain can be increased at different levels.This paper combines the advantages of  VMC and CSI in a high gain non- isolated dc-dc converter to improve the performance of the overall system at low cost and reduced maintenance. The system is simulated using MATLAB simulink software and the prototype is tested with 300 W , 120 to 240 V BLDC motor.