Question

Explain different types of losses occurred in DC motors.

Answer 1

Core Losses or Iron Losses in DC Machine or Magnetic Losses. As iron core of the armature is rotating in magnetic field, some lossesoccurs in the core which is called core losses. Normally, machines are operated with constant speed, so these losses are almost constant..

Answer 2

Magnetic losses (aka core losses or iron losses) These losses are associated with magnetic paths of themotor. Magnetic losses include hysteresis losses, caused by the changing polarity of the flux in the core, and eddy currents, which are induced in the steel core by the changes in flux polarity