Discrete logic current controlled brushless DC motor drive

Abstract

Multiple function discrete logic gates were used to implement the control electronics for a one kilowatt current regulated BLDC motor controller. The design was carried out in modules so as to be simple, robust and efficient. A two quadrant motor controller was successfully built and tested on an electric bicycle, and a four quadrant controller was simulated. Overcurrents during the commutation process were avoided using the proposed topology. The recovery of braking energy revealed the need for a better energy storage system.