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Old 08-19-2014, 11:01 AM   #7 (permalink)
Astro
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Quote:
Originally Posted by MPaulHolmes View Post
That's a good question. I don't know if a cap would work. That's my thinking of how the economizer works too. It would be PWM'ing into a capacitor, which might be hard on the transistor, but I'm not sure. Maybe you could add an R and then a C, so it wouldn't be as hard on whatever is switching?
Sorry Paul i described that badly. What i meant was a capacitor on the DC supply to the economizer close to the economizer, not on its PWM output side. So that as the economizer alternated between drawing current and not the capacitor would be supplying current whilst the controller would be supplying a much more constant current to keep the capacitor charged. So the current from the controller would have only a small amount of ripple in it rather than an on off square wave.
That way there wouldn't be a high frequency signal on the long wire from the controller at the front of the vehicle to the contactor at the back of the vehicle.
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