So I'm upgrading/modding my sim racing wheel out of scavenged parts and this motor I have is not that big but it has 3 wires coming out of a circuit on the back of it's casing with 2 huge resistors on it.(pics nelow). My motor relay has only 4 slots for power to the motor, 2 in and 2 out. Where would the third wire go on my motor relay?
The circuit
You can kinda see the brushes in there
There are no standards for this kind of thing so if you don't have a datasheet it's just trial-and-error.
Maybe the 3rd wire is ground (connected to the motor case) or maybe it's a speed sensor?
If you can run the motor directly from a power supply or battery you should be able to run it through the driver and that should tell you what wires to use.
Okay, that's what I was thinking with the trial-and-error part. I don't think one of them is a case grounding because all 3 are wired into a connector. I guess I should pick up a powersupply when I hit up the electronics store later.
It's likely the "third wire" is a tachometer output (spindle revs).
The PCB is marked 1 2 GND, so I assume 1 = M1, 2 = M2, GND is The common Ground for the capacitors.
I think that might be right. After further inspection I saw that there was an M1 and M2 label on the upper half so I think those are for the windings themselves.
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