# Using a single phase induction motor equivalent circuit in LTspice

I was planning to simulate a circuit which will control a single phase induction motor in LTspice where mains is 230VAC 50Hz. In my previous question, I failed to find an example: Modelling a "single-phase permanent split-capacitor motor" in LTspice

I was looking for any single phase induction motor circuit at any torque just for simulation purposes. I could only find the following eq. circuit together with resistances and reactances:

Here is the link for this realistic circuit: http://www.globalspec.com/reference/63637/203279/section-6-single-phase-motors

I adjusted this circuit to use in LTspice simulation. I guess all the reactances (X) in the above circuit are inductive; so to use in LTspice I need inductances.

Therefore since inductive X = 2 * pi* f *L; in my case I took L = X / (2 * 3.14 * 50). I took the slips as 0.005.

Here is after modification for LTspice :

My questions are:

1-) Is my modification reasonable and does it makes sense to use this in LTspice as a motor?

2-) There are two slips, I took both 0.005, for a fan motor is that reasonable in steady state?

note: I think a good motor simulation requires a lot of effort, but my aim is to represent the motor in LTspice in a very simple way.

edit:

• Do you have a link or addition to your question concerning the added image? – Charles Cowie May 15 '16 at 17:00
• yes I just added the link below the image – user16307 May 15 '16 at 21:19