Development of Microcontroller Based Speed Control Scheme of BLDC Motor Using Proteus VSM Software

 Abstract—This paper presents a simple way of designing a low cost microcontroller based 3-phase trapezoidal backemf permanent magnet BLDC motor drive, its simulation and hardware implementation. This controller is intended to drive a BLDC motor at any desired speed and at any load within its rated value. Pulse width modulation (PWM) technique has been adopted for developing 120-degree sixstep BLDC motor control algorithm. The microcontroller PIC18F4331 is used to utilize its six dedicated PWM channels for energizing the 3-phases of the BLDC motor. This paper also introduces the application of Proteus VSM (Virtual System Modeling) software as a real-time simulation tool to model the performance of BLDC motor drive following hardware implementation. The Proteus VSM simulation environment is preferred since it enables direct implementation of the compiled program file to the microcontroller both for simulation and hardware model, thus reducing hardware development time. Experimental verification has been carried out to validate the simulated circuit. Index Terms—BLDC motor, PWM, PIC18F4331 microcontroller, proteus VSM software