Laboratory Implementation Of A Small Scale Can Based Pm Bldc Motor Control For Automotive Accessory Electrification

This paper presents laboratory development of a real-time controller for small Permanent Magnetic Brushless Direct Current (PM BLDC) motor using a Controller Area Network (CAN) communication scheme. The CAN communication bus transmits and receives information between modules to control the speed, acceleration/deceleration, and rotating direction of the motor. The laboratory consists of five major hardwares: single chip microcontroller, three module boards, PM BLDC motor, logic-input quad driver, and a power logic level gate driver. Microcontroller software is developed for eight major functions: controller initialization, service interrupt, switch, display, power converter, CAN communication, pulse width modulation control, and actual motor speed measurement. The motivation of this work is to enhance the students’ learning of the PM BLDC motor control and CAN system in a laboratory setting. This work is important because electric drivetrain, accessory electrification, and the CAN communication system are widely employed in the electric and hybrid electric vehicles.