Control of brushless DC motor using DSP Motion control Kit

Abstract

Permanent magnet brushless DC motor (PMBLDC) find wide applications in industries and power system applications due to their high power and ease of control. These motors are generally controlled using a three phase power semiconductor bridge. For starting and providing proper commutation sequence to power devices in the inverter bridge, the detection of rotor position is required. The basic components involved in the BLDC control are BLDC motor, DSP Motion Kit and a PI controller which takes speed as a reference signal. The PI controller controls the modulation index of the inverter which in turn controls the input voltage to the BLDC. In this paper, it is proposed to carry out the mathematical modeling of BLDC, DSP Motion Kit, and the integration model in between Matlab and Hardware Kit. Different waveforms are applied for closed loop operation under both off load and on load conditions. The Simulation Results and Hardware Results are analyzed and compared.