# Homework Help: Graphing Induction motor characteristics

1. Apr 22, 2012

### coltfourfive

1. The problem statement, all variables and given/known data

5HP, 60 hz, 440Vac, 3 phase induction motor.

Graph:
3 Phase Torque vs RPM
Current vs RPM
Mechanical Power (HP) vs RPM
Efficiency vs RPM
Power Factor vs RPM

2. Relevant equations

I'm having trouble finding equations online relating relating these values. Can anyone give me a pointer in the right direction as to what equations I need to start with?

3. The attempt at a solution

The first part of the problem asked me to create an excel spreadsheet calculating R1 X R2 Xm and Rm for the equivalent circuit for slip values between 0 and 1, given No Load and Locked Rotor Test results for and induction motor and I have that working well, just where to begin with the graphs is confusing me.

Thanks

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