Sjouke Burry wrote:
wrote:
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
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. 
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