DC Motors and Controls

It is in this module that the student learns the principles of DC motors and the systems that are used to control their speed and direction. The main components of a DC motor are explained and the fundamentals of torque, counter emf and speed regulation are introduced. The applications of DC motors in EVs are presented and the most popular DC motors, including BLDCs are described.  An introduction to pulse width modulation (PWM) and regenerative braking is included as well as the principles of four quadrant operation of a motor.

Learning Outcomes:

Upon completion of this module the student will be able to:

  • Name the main components of a DC motor
  • Explain the purpose of commutation
  • Differentiate between a stator and an armature
  • Define torque and counter emf
  • Calculate the torque of a DC motor
  • Explain the operating principle of BLDC motors
  • Name the two commutation methods in BLDCs
  • Determine the % speed regulation of a DC motor
  • Calculate the step angle of a stepper motor
  • List five types of stepper motors
  • Explain how PWM is applied to DC speed control
  • Define the terms dynamic and regenerative braking
  • Describe the four quadrant operation of a DC motor
Display Order