12-22-2014, 03:27 PM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Quote:
Originally Posted by SydneyChris
thanks Mike,
Are there any compatibility issues with the type of fan motor..?
Chris
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I shouldn't think so. Pulse width speed controllers work by pulsing the DC power on and off at varying duty cycles. Much like the way the injectors work in your EFI system. The longer the injector is on for the more fuel flows.
The longer the pulse of DC power is on for the faster the fan goes. The fan has some inertia so the pulsed DC doesn't make the motor stutter or any thing.
A VSD is used on 3 phase motors and works by changing the frequency of the 3 phase power to change the speed. Pulse width controllers are for DC motors
Cheers
__________________
Mike Murphy
Melbourne Australia
Last edited by Aussie Mike; 12-22-2014 at 03:29 PM..
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