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CoolROD · 08-06-2003, 09:20 PM

Neat find on the Aux. heat unit...The motor will probably be a series-wound "universal" motor or, more likely, an induction motor. Both will respond -to some extent- to clipped waveforms and PWM control. Be advised that there will be little torque at lower RPMs, unlike a DC motor, so the rpms and fan output will drop quickly as you clip the waveform. Watch the temps if you try to run it for extended periods at low RPMs b/c it may not cool itself.

Can you put a DC motor on it?

08-06-2003, 09:20 PM	#10
CoolROD Cooling Savant Join Date: Mar 2003 Location: North Carolina, USA Posts: 225	Neat find on the Aux. heat unit...The motor will probably be a series-wound "universal" motor or, more likely, an induction motor. Both will respond -to some extent- to clipped waveforms and PWM control. Be advised that there will be little torque at lower RPMs, unlike a DC motor, so the rpms and fan output will drop quickly as you clip the waveform. Watch the temps if you try to run it for extended periods at low RPMs b/c it may not cool itself. Can you put a DC motor on it? __________________ Jack of all Trades, Master of None.