Three phase AC motor model problem...

[Tobster]

Hello, is there a way to use the 3PH_Motor from the family OUTPUT_DEVICES located in the group Electro_Mechanical but with a modified Spice model that uses only the data printed on the nameplate? I ask this question because I have to simulate power factor correction using a field of 10 motors rated at 110 kW each for my thesis, but I need the R and L of the windings in order to use the default model and I cannot find these values in catalogues.

Thank you in advance and I hope there is a way to solve this problem...

[OStep · Accepted solution]

I am assuming you're looking for an induction motor.

It would be an oversimplification to model an induction motor using a fixed R,L load (In V12 of Multisim, we actually removed the 3PH_Motor and instead added a more realistic dynamic model based on a more realistic parameter set). An induction motor is in many ways like a transformer. Therefore you need the magnetising inductance, rotor and stator leakage inductances, and rotor and stator resistances. You may be able to contact the manufacturer to obtain, but I doubt you can accurately deduce them just from the name plate.

This link goes over a simple steady-state model: http://www.scribd.com/doc/13311930/Induction-Motor-Modeling-steady-State

Thanks,

[Tobster]

Thank you very much! Today one of my teachers showed me the new models implemented in V12. Awesome stuff going on there.  Again thank you, and have a nice day!

[OStep]

Excellent.

It'll be interesting to know how you're using them.  If possible, please share with us any labs and circuits.

Thanks