Speed Control of BLDC Motor Using PI Controller

Abstract

Permanent Magnet Brushless DC (BLDC) motors have major application in industries like E-mobility (Electrical vehicles, Electric bicycle), Industrial robots, CNC machine tools in the last decade. BLDC motors are at the core of many industrial automation applications, but they face major problems when performing speed control. Because brushless DC motors are compact, they are highly efficient and have high torque-to-power ratios. Brushless DC motors require little maintenance since they run brushless rather than on a rotor. FPGA based speed controllers are used to control speed of BLDC motors in this paper. The Hall Effect sensors are used to commutate the BLDC motor in the presented technique. An algorithm for closed-loop PWM speed control of BLDC motors with FPGA is proposed. A predefined value or user control is used to control the motor speed.