motor
I salvaged from an old microwave, the motor that spins the food tray. I'm trying to figure out how much voltage I need to apply to it in order to get it to spin, but I cant make any sense out of the numbers on it. It's a Synchronous Motor.
This is what's on it:
100/120v~ 50/60Hz 4W
4/4.8r/min CW/CCW
I can guess that it rotates from 4 to 4.8 rotations per minute? but other than that, I'm clueless. What do these other things mean? Thanks so much!
Yes, the first number is the number of stator poles and the second number is the number of rotor poles.
The Johnson HC683LP-022 is a 12 V (max), ~20000 RPM, 338 W motor with diameter 35.8 mm, intended for electric drills.
Johnson appear to make a very large variety of similar looking motors. Your best bet may be to search their site for the model that best matches the specification used in the advert of the ones you purchased and hope for the best.
Since the eBay listing has no information, you could measure and weigh them (without cog) when you receive them and compare with Johnson specs for various motors (they are sorted by casing diameter).
I'd then try them with lower voltages and monitor temperature.
There are disadvantages to buying from cheap eBay vendors.
Best Answer
Taking a few guesses here, but:
100-120V~: operating voltage, "~" (tilde) indicates AC voltage
50-60Hz: operating AC frequency
4W: power consumption (maximum stall perhaps?)
CW/CCW: works in both ways (clockwise and counterclockwise.) This usually means it is a synchronous motor, and its direction depends on either the sign of the incoming AC waveform, or whichever direction has the least torque - in other words, it's more or less random.