HSC Together > Year12 > Back EMF in DC Motors

Physics

Back EMF in DC Motors

This section is part of the HSC Physic syllabus Module 6: Electromagnetism under Applications of the Motor Effect.

Motors are the core of how so many mechanical systems work in today’s world. So let’s learn a little more about how a DC motor works. We’re going to cover the following information about a DC motor:

  • Back EMF in a DC motor

 

Back EMF in a DC motor

Back EMF comes from the conservation of energy. BackEMF is a force created to oppose a change in flux. This usually happens when a motor starts up.