Transient Suppression Diode Link (for techies)

Hi,

My class C disconnects most electrical systems when the ignition is moved to the start position. I think that is the case with most starting systems?

The other dc motors in my unit are the water pump, a commode fan, and a fantastic fan--but their power demands are rather modest.

Mex, Link is to a diode.

A capacitor would not help transients on my house equipment as it's not initially connected to the engine or alternator. After starting and then when the chassis battery voltage stabilizes the isolator is engaged to charge the house battery. For solenoid isolators that immediately engage with ignition on a capacitor might be helpful.

Good point. Mines nice and clean, but hadn't thought about the effect on the older boxes. Are those 1/2wave or just poorly filtered?

Do Not do this, with any converter that has ripple in the output (old magtecs) etc
The filter will have the effect of raising the voltage
Great for battery charging from generator
Bad for any thing voltage sensitive
This is something I know from experience
The 25uf with diode at the heavy current motor a k a starter
It's ok
But stick that big audio hunker on the converter and you will create problems

Might as well strap one at your catastrophic fuse near the batts also. I wonder if it would play any havoc with a PWM solar controller?

I expect the problems start at the end of a reasonably undersized feeder to the coach DC breaker panel..?

Since every is (usually) distributed through the panel, I wonder what hanging one of those 2+ Farad caps that they sell to stiffen the DC feeder to these 2000watt lowrider getto stereo systems would do? It's a spike suppressor in itself.

Can't hurt to put a similar filter across the furnace motor and water pump too. Anything that uses magnetic fields to do work is gonna kick back transients :)

Reverse bias the rectifier, the cap is electrolytic so polarity needs to be observed as well. At the starter motor side of the solenoid, will do fine. Double encapsulate both discrete components in dual wall heat shrink tubing, make a service loop on each side of the encapsulation and you're home free. Remember NEGATIVE transients are involved as well. This kills them dead.

Hi Mex,

Is that done at the motor? At the battery? Parallel or series?

Thanks.