How to find the starting and running winding in a single-phase motor

It would seem that may be easier to look at the label, schema and determine what to do if neither one nor the other is not how to find the starting and running winding? In this article I will tell and show by example how to define destination windings happens if there is no marking at the same determinants.

visual inspection

As an example, I'll look at the engine AEP 16UHL4 220V 180WLeft over from the old Soviet washing machine, gone for scrap.

Performing a visual inspection I found it no tag information other than the name. But dig deeper into the Internet and found a description, I realized that for me the engine to start winding relay start.

Of the engine itself are the four wires, two of them dirty blue, and two red and pink. It is logical to assume that this conclusion starting and running windings.

But here are some start-up, and what to labor, is unclear because there are no tags.

But this is not a problem, now I will tell you how to deal with such a situation windings.

conductor cross-section

The first thing you should pay attention to is the thickness of the wires coming from the motor. Couple all that will be thinner, refer to the starting coil, and one that is thicker to the work.

In my case, the wires have the same cross-section, so to determine "the eye" does not work.

But if in your case specifically shows the difference in thickness is not worth living trust only the diameter, it is imperative to measure the resistance of the windings.

Knowing this fact, we go to the definition of winding resistance

We measure the resistance of the windings

To take this multimeter choose continuity function (either a resistance measurement)

Then take the ends of the device and any two of the output from the engine and measure the

In the case, if the device unit shown, it should take the other end and a repeat measurement.

As we can see in this arrangement the probe impedance is 16.5 ohms, remember (write) the data. Now we catch multimeter probes on the two remaining output and also produce resistance measurement.

We got 34,4Om. It is also recorded and compared with previous measurements.

And as is known working coil always has a lower resistance compared with starter. Knowing this, we can now say for sure that: the first coil (with red and pink wires) work, and the second coil (blue insulation) launcher.

In order not to look in the future where some winding mark them. For these purposes, I usually use a vinyl tube.

According to current state standards output windings are marked as follows:

1. U1 - U2 - operating winding.

2. B1- B2 - start winding.

In this case, the motor output 4 wires, but across engines in which the manufacturer brought only three.

In this embodiment, we proceed as follows:

Resistance measurements are made similar to the method described above. We mark our wires letters A, B, C.

We measure the resistance between the ends of the "A - B", then between the "B - C" and between terminals "A - C"

Now write (remember) Get the value of our

From all the above, it is concluded:

A - B - operating winding

B - C - Start winding

A - C - consecutively connected launcher and working with total resistance of the winding.

conclusion

Thus, you can quickly and easily determine where the start-up, and where the operating winding in exactly your engine which can be absent marking. If the article was useful to you, you will appreciate it Like. Thank you for your attention!