|Apr22-12, 03:39 PM||#1|
RPM vs Torque, I, Mech HP, Eff, and Fp of an Induction Motor
I need to create graphs of:
3 Phase Torque vs RPM
Current vs RPM
Mechanical Power (HP) vs RPM
Efficiency vs RPM
Power Factor vs RPM
for Slip between nearly 0 and 1 for a 5HP, 60 hz, 440Vac, 4 pole, 3 phase induction motor.
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?
|Apr23-12, 12:46 PM||#2|
Try to google for the equvivalent circuit for induction motor. There you will have all the equations you need, presuming you have the values for the motor impedances.
|Apr23-12, 01:13 PM||#3|
see if this link is any help
there's no one minute answer. The size and shape of the rotor bars is designed to give the desired speed-torque curve. There are four basic curve shapes A through D depending on the nature of the load to be driven. Starting torque and pull out torque are main points of interest.
Try google 'motor curve images ' and a quadratic curve fit to one that looks appealing.
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