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FPGA Based Digital Controllers for BLDC Motors

Permanent Magnet Brushless DC (PMBLDC) machines have found immerse applications in automobile, automation, consumer electronics, medical and industrial applications due to their high efficiency, long operating life ratio of torque delivered to the size and fast dynamic response. In a brushless motor, the rotor incorporates the magnets, and the stator contains the windings. Commutation is implemented electronically with a drive amplifier that uses semiconductor switches to change current in the windings based on rotor position feedback. Commutation is implemented on FPGA as it provides greater flexibility and higher resources for implementing control algorithms. The paper thereby deals with the development of a virtual BLDC motor controller in FPGA. Various other digital controllers are also discussed. A model of the BLDC motor is simulated, and its controller is implemented on a FPGA system.