Breakdown of Motor Losses
Breakdown of Motor Losses
(OP)
I'm trying to determine the approximate distribution of losses in a typical three-phase induction motor ( say 100 hp, 1800 rpm, running at rated conditions). The best approximation I have at this point is:
Stator (I2R) 35%
Rotor 20%
Core 20%
Friction & Windage 15%
Stray 10%
Does this look about right?
Thanks,
dpc
Stator (I2R) 35%
Rotor 20%
Core 20%
Friction & Windage 15%
Stray 10%
Does this look about right?
Thanks,
dpc





RE: Breakdown of Motor Losses
Mark Empson
http://www.lmphotonics.com
RE: Breakdown of Motor Losses
RE: Breakdown of Motor Losses
Motor 500hp/1200rpm 1000hp/3600rpm
core 4.4 5
stator 9.8 12.6
rotor 8.1 8.4
stray 3.5 8.2
friction/windage 1.2 6.8
total 27 41
The most evident trend (as expected) - low speed motors have higher fraction of core losses, high speed motors have higher fraction of friction/windage losses.