Performance Improvement of BLDC Motor with Hysteresis Current Controller Topology

Abstract: In the recent past, variable speed driving systems have use in various small scale and large scale applications like automobile industries, domestic appliances etc. This lead to the development in Brushless DC motor (BLDCM). The usage of BLDCM enhances various performance factors ranging from higher efficiency, higher torque in low- speed range, high power density ,low maintenance and less noise than other motors. In this paper hysteresis current controller is implemented with speed feedback loop and it is observe that torque ripples are minimized. Simulation is carried out using MATLAB / SIMULINK. The results show that the performance of BLDCM is quite satisfactory for various loading conditions.

Keywords: Speed controller, feedback loop, Brushless dc (BLDC) motor drive.