Equivalent circuit of a ceiling fan.

Equivalent circuit of celling fan.

I am trying to simulate celing fan regulator. For this I need electrical equivalent circuit of fan with values of LR & C. that runs on 230V AC. Can someone please help me ?

Re: Equivalent circuit of celling fan.

I_think said:

I am trying to simulate celing fan regulator. For this I need electrical equivalent circuit of fan with values of LR & C. that runs on 230V AC

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To perform a trustworthy simulation of the motor of an AC fan in a transient analysis, you should have to take into account the load (the effect of drag on the helix blades), and the Lorentz effect on the equivalent electric circuit; that is, unless you want a simpler steady state model at its terminal rotational velocity, you can get this information empirically by measuring the power factor and the current load, which can be represented only by a resistive and a series inductive load.

Re: Equivalent circuit of celling fan.

You need to specify the motor type, shade-pole or permanent split capacitor. Useful model attention to detail depends on the intended control method.

Re: Equivalent circuit of celling fan.

FvM said:

You need to specify the motor type, shade-pole or permanent split capacitor. Useful model attention to detail depends on the intended control method.

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andre_teprom said:

To perform a trustworthy simulation of the motor of an AC fan in a transient analysis, you should have to take into account the load (the effect of drag on the helix blades), and the Lorentz effect on the equivalent electric circuit; that is, unless you want a simpler steady state model at its terminal rotational velocity, you can get this information empirically by measuring the power factor and the current load, which can be represented only by a resistive and a series inductive load.

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Ok, So after thinking a lot on what it should be ,I realized, that would really be overdoing the simulation . My case needs this for getting the values for RC snubber. connected across the fan.

Re: Equivalent circuit of celling fan.

We have now fan motors that are BLDC run from 220VAC via a regulator (they have very good speed control). But most conventional fans are single phase AC induction motor with a capacitor start split winding. The speed regulator is simply a series resistor or sometimes an electronic one. The motor can be modeled as a simple inductor and the load can be modeled as a series resistor. The speed can be considered proportional to the total current but I presume you are interested in the steady state results and not the transient analysis.