The exact equivalent circuit model of an Induction motor is
where
R1 is the stator resistance per phase
X1 is the stator reactance per phase
R2' is the equivalent rotor resistance referred to stator per phase
X2' is the equivalent rotor reactance referred to stator per phase
Rc is the resistance representing core losses
Xm is the magnetizing reactance per phase
V1 is the per phasesupply voltage to the stator
s is the slip of the motor
Power flow in an Induction motor
From the circuit, we see that the total power input to the rotor Pg is
The power flow diagram is-
The power flow diagram is-
Source
http://powerlearn.ece.vt.edu/modules/PE2/index.html
How the efficiency of induction motor is measured?
Abstract
The efficiency is of paramount importance nowadays due
to increasing electrical energy demand, increasing awareness of
environmental problems as greenhouse effects and increasing
fossil fuel prices.
http://powerlearn.ece.vt.edu/modules/PE2/index.html
How the efficiency of induction motor is measured?
Abstract
The efficiency is of paramount importance nowadays due
to increasing electrical energy demand, increasing awareness of
environmental problems as greenhouse effects and increasing
fossil fuel prices.
This paper tries to show the different results between the
standards for efficiency evaluation and the necessity of
harmonization worldwide. Then, it is going to be explained the
different standards for measurement of efficiency, and the main
differences between the standards (IEEE 112, IEC 60034-2 and
JEC-37).
To complete this study, it is going to be described the steps
in order to estimate efficiency on the jobsite and expressed the
different efficiency labels motors.
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