Losses in Induction Motor:
A. Constant losses:
Â· These losses are not dependant on loading condition so the name constant losses further these having two types:
a) Core losses:
Â· We can call this losses as an iron losses and they consist of the stator core and rotor Core losses
Â· These are also consisting of a Eddy current losses and Hysteresis Losses and we neglect or reduce the hysteresis losses by slecting high permeability material for Core used.
Â· And Eddy current losses can be reduced with the help of laminated cores instead of solid ones.
a) Mechanical Losses.
Â· Mechanical losses occur due to winding and the friction in the induction motor
B. Variable Losses:
Â· These type of loss include stator Copper loss and rotor Copper loss
Â· These are in directly proportional to the square of the stator Current and rotor Current
Â· A stator and rotor current dependant on the load so the copper loss varies with change in load and hence we are calling these type of losses as variable losses.