Electronic – How to Wire a 120V Dryer Motor for Use in Other Projects

acmotorwiring

I have a Whirlpool Dryer Motor (Model Number S58NXMKE-6674 or Part Number: 3395652) Image Below:
Numbers
This is a type of universal motor that uses an electromagnet instead of a permanent magnet in the stator region. I have a hypothesis that I may be wiring this device improperly. I've also observed a curious thing. When using an Ohmmeter to measure the resistance between the 2 red wires (Which I assume are for the brushes giver their larger diameter) I get an overload condition, indicating non-continuity. I have a picture of what the wiring situation looks like below.
Wiring
Using the multimeter's connectivity mode I've determined that:
The black wire is not connected to anything, and that
the bright green wire on the bottom is the cases's ground connection. This just leaves the two large red wires (Which I believe were directly wired to the 120V (One was wired to the mode selector switch I think), and the two smaller wires (The blue sky one, and the white one) which I believe are the field coils.

What is the proper wiring for this? I've assumed that the two red wires are for the brushes and tried a wiring scheme of (All are series connections): Hot wire -> Red Wire 0, Red Wire 1 -> Field Winding 0, Field Winding 1 -> Neutral. When I flipped the switch, nothing happened and my clamp on multimeter read 0A when clamped just on the hot wire. Granted I was using 120V, but I would have expected around a burst of 12A or so and for the motor to start spinning, this didn't happen.

Is the black wire relevant somehow, or is it just used for a computer to manage speed or RPM or stats or something like that? What is the correct wiring for this type of motor?

Edit 0: Judging from the comments this is almost certainly an induction motor without a capacitor. I'll retry it in with a new setup tomorrow.

Best Answer

The motor circuit is probably something like the following diagram. The start circuit could include a centrifugal switch that opens when the motor reaches full speed. It may or may not include a series capacitor. It could be contained in an electronic control module. If there is a centrifugal switch it may have more than one contact. One contact may enable the heating when the motor reaches full speed. Manufacturers sometimes change configurations without changing the model number of the dryer. A replacement motor for a given dryer may not be the same as the original motor.

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