Brain, The popcorn poppers often use a secondary heating coil as a dropping resistor to drop the incoming AC line voltage down to the voltage needed by the motor. The four diodes around the motor power terminals make a full wave bridge rectifier to convert the now lower voltage AC to DC to drive the motor. There is no filter capacitor after the full-wave bridge so the motor is getting pulsed DC, but the motor doesn't care. The inductance of the motor and the rotating mass do serve to smooth the current a little.
Shane On Mon, Oct 29, 2018 at 10:38 AM Brian via TriEmbed <[email protected]> wrote: > > I measured around 16 volts DC going into the motor. It was increasing > slowly as the motor warmed up. Started around 15.9 Volts. Does that help? > > Sounds like you're in good shape to run it off a DC power supply like in > the article. If the popper's own DC power supply is isolated, you could > just use it. Note that there's a high chance it isn't isolated. > > > It looks like there are two diodes in series attached to each motor > terminal. > > So.. diode-diode-motor-diode-diode? Hm. What's between that and the > AC power input? It's not critical, but now you've got me curious... > > > Do I need to disassemble it more to learn something else? > > Probably not, but now *I* want to disassemble it more! ha > > <snip> > > _______________________________________________ > Triangle, NC Embedded Computing mailing list > > To post message: [email protected] > List info: http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > TriEmbed web site: http://TriEmbed.org > To unsubscribe, click link and send a blank message: mailto: > [email protected]?subject=unsubscribe > >
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