Study and Implementation Process Of SOC Based BLDC Motor Controller

DC motors are well-known for their torque-speed characteristics. It is also known that the brushes and commutators used in brush motors pose maintenance problems due to their wear and EMI due to the arcing in the brushes and commutator. BLDC motors address both these problems and while giving the desirable torque-speed characteristics reduces the maintenance problems posed by the brush dc motors and offer methods for EMI reduction. Here a speed control for a BLDC motor has been designed and integrated into a FPGA , as applicable to drive based system. The FPGA as controller gives the desirable features like electronic commutation and generates the PWM gating pulses to the MOSFET 3-ph full bridge inverter for precise speed controller implementation in an easy programmable way. Here a modified approach for PWM generation has been implemented, which achieves accurate speed controller and avoids the triangular carrier comparison. An approach to implement a SoC based BLDC motor controller with interface to a Resolver to Digital converter, a 3-ph power inverter. This approach would help in minimising the circuit count with enhanced reliability in implementing precision speed control.