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Need help wiring a breadmaker motor.

I have a reversable motor removed from an Oster breadmaker. I want to use it on a project because the motor runs very quiet. The motor is a

60Hz 120V motor that has three wire. Red, white and blue. The white wire goes to nuetral on the AC outlet. The other two wires goes to a circuit which has two transistors, capacitors and more. When I measure these two wires they show 120V AC (forward spin) and 150V AC (reverse spin.)

This motor is probably a DC motor, I don't know for sure. The circuit board is thrown out and all I have is the motor. How do I power up this motor?

Thanks

Reply to
rspartacus
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At a quess, a capacitor goes in series with one of the remaining wires, so white to neutral, the other two to power, but one of them with the cap in series. I hope you noted the value of the caps on the cicuit board , but depending on the size of the motor, something between 1 and 10 microfarad,200 volts. When you swith the two wires between direct and cap, you should reverse the rotation direction. If you are carefull, the only damage would be some smoke or a blown fuse if this story does not hold. Stand well back when you switch the power on. :)

Reply to
Sjouke Burry

If there are no brushes it is an AC motor. May be PSC.

Reply to
Homer J Simpson

And note that the capacitor has be rated for AC, not a common eletrolytic. This is a typical motor run cap.

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Reply to
Sam Goldwasser

This sounds like a PSC motor, the direction of rotation will depend on which of the two leads the cap is in series with. Can't you trace the existing circuit?

Reply to
James Sweet

Doing your initial testing with the thing in series with a lightbulb should prevent the magic smoke getting out, the light repels any emergent smoke back inside. Try some different cap values to maximise its speed. Once done, let it see real mains, and repeat the cap maximisation exercise but only using values close to the best one you selected with the lamp.

NT

Reply to
meow2222

It worked. The circuit board was thrown out so I couldn't trace the circuit. The only hint is that the motor says "2.5 uF" but I could only find a 12.5 uF, 200V capacitor. I let it run for an hour and it ran cool. Hooking them up in series with a light bulb, until it began to run slowly, helped a lot. And Sjouke Burry's guess was correct. Thanks to all.

Here's a working ascii circuit, in case I forget.

Forward: 12.5uF || o------||----------o Blue - to motor | || | AC in--o------------------o Red - to motor

AC in--o------------------o White - to motor

Reverse:

12.5uF || o------||----------o Red - to motor | || | AC in--o------------------o Blue - to motor AC in--o------------------o White - to motor
Reply to
rspartacus

...

That's a PSC motor.

Reply to
Homer J Simpson

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