The ANALYSIS OF PERFORMANCE ON LEG INVERTER FED BLDCM DRIVE

Abstract

In small scale and large scale applications like automobile industries, domestic appliances such as
Refrigerators, washing machine and air conditioning units which use conventional motor technology.
These conventional motors have a characteristics of Low torque, high maintenance and low efficiency.
The usage of BLDCM enhances various performance factors ranging from higher efficiency, higher
torque, high power density, low maintenance and less noise than conventional motors. The main
drawback is high cost. In this paper a two leg inverter fed BLDCM drive is proposed which uses only
four switches and two current sensors compared with six switches, three current sensors in case of three
leg inverter fed BLDCM drive. Less number of switches and current sensors means less switching loss
and low cost. In this paper a two leg inverter fed BLDCM drive with two input DC source is proposed.
The proposed PMBLDCM drive is modeled and its performance is simulated in MATLAB / SIMULINK
. This proposed method is a simple, low cost and enhanced performance of dive is obtained i.e., reduced
torque ripple, less voltage stress, Low current THD and fast dynamic performance of PMBLDCM drive.