Inverter duty VS Normal asynchronous motor
Inverter duty VS Normal asynchronous motor
The basic difference in
inverter duty and normal asyncronous motor is the cooling area and insulation
class.
In inverter duty motors the
cooling area of the core is increased and in addition to that a separately
powered cooling fan is placed instead of ingral cooling fan due to reduce the
high heat generation during low speed.
The winding insulation is
incresed (aprox. 2 times) to atempt the high heat generation of the motor
during low speed operation.
Efficiency of the motor is
higher than the normal induction motor as the cooling effect has been
increased.
We cant use normal induction
motor in the invertar duty as the cooling effect will be lower in low speed
operations and in normal speed harmonics effect to the motor temp. rise may
resulted to failure of the motor.
slightly higher costing effect for the purchase of inverter duty
motors.
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