The nice thing is those motors tend to be very cheap and easy to find AC asynchronous type motorsWith some of the gears off, make sure that the motor still runs (be careful not to shock yourself). And/or, do a continuity check with an ohmmeter to see if the coil has gone open. Unfortunately, If the coil is open, the motor is toast.
Talk to Tim the Toolman ohhh ohhh ohhhWhat can a guy to to make these things really spin? Like chucking the drippings all over type of speed? lol
Not happening with this type of motor. These motors are typically used for cooling fans and low power applications. The only reason they can spin the weight that they are rated for is because of the torque multiplication that comes from the gear ratio. In general, AC motor speeds are frequency related and again, in general, 1800 or 3600 RPM are common speeds found with a 60Hz AC input. So if the motor spins at 1800 RPM and it is geared down to a 3 RPM output, that is a 60:1 gear ratio, or torque multiplication of 60x, assuming 100% efficiency.What can a guy to to make these things really spin? Like chucking the drippings all over type of speed? lol
Agreed. The real advantage of shaded pole motors is that they are pretty inexpensive to manufacture. They aren't particularly efficient, and usually run rather warm. I have run across a few that had open coils, which is why I suggested that the motor's operation be confirmed before going much further. Now that it is known that the motor works, cleaning and lubricating the gear train is the next move. Also agree that these motors are fixed speed induction motors, running a multiple of the line frequency (in this case, 60Hz). So speeding up a motor of this type for this application would likely prove cost prohibitive.Not happening with this type of motor. These motors are typically used for cooling fans and low power applications. The only reason they can spin the weight that they are rated for is because of the torque multiplication that comes from the gear ratio. In general, AC motor speeds are frequency related and again, in general, 1800 or 3600 RPM are common speeds found with a 60Hz AC input. So if the motor spins at 1800 RPM and it is geared down to a 3 RPM output, that is a 60:1 gear ratio, or torque multiplication of 60x, assuming 100% efficiency.
I suppose, if a guy was hell-bent on doing this, a VFD (variable frequency drive) could possibly be used to multiply the frequency to maybe 180Hz, but the motor wouldn't last very long. It would be easier to buy a DC roti motor and drive it at a higher voltage than it is rated for. I've done this with my pizza oven, to spin the stone faster (turned out to be a bad idea: the stone moves too fast to pick up the heat from the burner and actually runs cooler than it did at a slower speed).
I think it should work just fine, fire it up and let's see.I just bought this unopened NOS rotisserie recently.
I don’t really want to open it and find out myself, so what are the odds this doesn’t spin if I were to fire it up at this point?
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