How to Identify Main and Auxiliary Windings in a Single-Phase Motor

Question

Hello
I have a problem with a single-phase motor, i.e. identifying which windings
is the main one and which is the auxiliary one [the plate is disconnected], which of the windings
has greater resistance
Regards

huk90 · Answer

Here you will learn about the working winding Regards, this is just one version You can always use this

aga-aga3 · Answer

Hello
Someone was really confusing here because the starting winding always has a GREATER resistance and the capacitor is not used to change the direction of rotation, but creates a phase shift between the starting and running windings, and to increase the starting torque and engine efficiency.
Capacitorless motors can also rotate left or right.

warbipower · Answer

Hello
Of course, the working winding has lower resistance. For low-voltage enthusiasts, I recommend http://elektryk.ovh.org/silnik_ Jednofazowy.htm
There is a diagram and it describes how to measure, connect and change the speed in such an engine.
Regards

aga-aga3 · Answer

Hello If 3 cables come out of the engine, it will always rotate in one direction, to change the speed you need to swap the starter terminals - 4 cables must come out

1.b · Answer

Hello! I have a small problem, namely, I have a centrifuge motor, it has four pins, I don`t know how to connect it, it also has a starting coil, I tried it, but after connecting it, the motor hums and does not rotate! please help.

Topolski Mirosław · Answer

Let`s determine that 1 and 2 are the working winding (lower resistance) and 3 and 4 are the auxiliary winding (higher resistance). You supply power to 1 and 2, and connect the auxiliary 3 to 1 and plug in a capacitor between 2 and 4. If the speeds do not suit you, swap terminals 3 and 4. Try to replace the capacitor (when there is a humming noise).

dj_west · Answer

Hello!

And I have the following problem... I got a motor from some Chinese free-standing fan (the rotary type) and there are 4 wires coming out of it. A 1uF/400V capacitor is also visible. I measured and this is what it turned out to be:

BLUE
100 ohms
WHITE
100 ohms
RED
700 Ohms
BLACK

The rest of the transition resistance relationships between the wires are simply the sum of the individual resistances (e.g. blue-black is 100+100+700=900 Ohm).
Anyone willing to help me figure out this engine? :)

Hmm... I`m starting to suspect that BLACK is common and the rest is simply used to adjust the speed.

mateuszkonicz · Answer

As far as I know, my friends, the 1-f motor is made of 2 windings:
working and auxiliary.
The auxiliary winding has a higher resistance and the working winding has a lower resistance,
1-f engines had a so-called centrifugal switch that disconnected the auxiliary winding from the working winding. Currently, a capacitor is used instead of a switch. In case of changing the direction of engine rotation, this can be done when the ends of the working and starting windings are connected.
Your friend is right, these resistances are the fan speeds, the so-called gears, I don`t know how your friend measured the resistances, I mean what colors does this resistance result from?

RobWan · Answer

Not always. If the windings are equal, three wires on the terminal strip are enough. Robert

How to Identify Main and Auxiliary Windings in a Single-Phase Motor

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