Q1:(adsbygoogle = window.adsbygoogle || []).push({});

So I'm trying to extract the electrical properties of a single phase induction motor. First off, how am I supposed to measure the phase difference between the start and run windings? I have L and R of start and run windings too!

Q2:

I have a torque vs slip curve up until 130% of rated load. Using this I was told I'm supposed to curve fit this data to the equation Torque*c1 = c2*s/(1+(j*w*t)) to get the time constant t of the rotor (or L/R of the rotor). I'm not sure how I'm supposed to do this. I also have this L/R value using the electrical model that I found with locked rotor measurements.

Q3:

If this system was to be switched with a capacitor to get 90 degrees phase shift, how do I calculate the capacitor value? I know I'm supposed to draw a phasor diagram and find the value of C so that it forms the required phase shift but I need more explication on that.

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# Single Phase Induction motor winding phase difference

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