Without a doubt, induction motors are the most used type of motors in the electrical industry. We have already discussed several pieces of information regarding this induction motors in our previous articles. Today we are going to discuss the induction motor equivalent circuit which is one of the important feature to analysis the performance of the motor.
induction motor equivalent circuit diagram
If we consider about solving problems or finding necessary parameters its is very important to analysis this induction motor equivalent circuit.The left-hand side is considered as stator side and right-hand side considers as rotor side of the induction motor.
Per phase equivalent circuit is given for the phase winding. the winding then serves either star connection or delta connection according to the identity the per phase equivalent circuit voltage and current.
r1 – Stator resistance per phase
r2 – Rotor resistance per phase
rc – Core Loss resistance per phase
Xm – Magnetizing reactance per phase
X1 – Stator leakage reactance per phase
X2 – Rotor leakage reactance per phase
Vs – Stator voltage or supply voltage per phase
Is – Stator current or supply current per phase
I0 – No load current per phase
I1 – Torque producing component of stator current per phase
I2 – Rotor current per phase
E1 – Stator internal emf per phase
E2 – Rotor emf at stand still
n1: n2 – The effective turns ratio within the stator and rotor
s – Slip
Simplified Equivalent Circuit Parameters
The mentioned induction motor equivalent circuit can also simplify into several forms. So this can get simplified into with referring rotor side parameters and stator side parameters. The simplified equivalent circuit with referring to stator or rotor side will eliminate one node of the circuit diagram. So its much easier to find out necessary parameters.
How to calculate the induction motor performance
By using the shown equivalent circuit model of induction motor we can determine several important motor parameter such as
- Motor current
- Motor Power
- motor torque
Other Relevant Post of Induction Motor’s
Following are several articles regarding the important information of induction motors.