Switching power supplies and overcurrent protection

Depends on your application. If those spikes are "normal" in your scenario and not an indicator of doomsday being around the corner then constant current may be your ticket. I use it a lot, for example in gear that can occasionally arc and where that is considered ok. But there is usually some sensing included that puts a lid on it when the frequency of spikes gets to be too much.

If stuff could be overstressed consider slight foldback.

--
Regards, Joerg

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** The output filter electros in SMPS will always supply fast, over ( rated) current spikes.

IME - only linear PSU have instantaneous acting current limiting.

..... Phil

App is low power DC servo CNC. Unregulated DC supplies are the norm here but nowadays a SPS can be cheaper than the AC transformer al>

Well, fast is a relative term, so let me put it this way....I've found Meanwell shutdown and hiccup SPS types to be unsuitable for my needs.

>

"Phil Allison"

:Well, fast is a relative term,

** Sure is.

You need to learn basic electronics terminology.

: so let me put it this way...

** You need to lean to write clear English.

Shame the pre-requisite for that is clear thinking.

: I've found Meanwell shutdown and hiccup SPS types : to be unsuitable for my needs.

** Simple - don't use them.

You already know what kind of PSU works .

..... Phil

I think it suffices to say that the mean spirited and the wretched from down under are best avoided.

>

Then you need one with clean current limiting or hang a large capacitor onto it. But there is often a maximum allowed capacitance so I'd ask the manufacturer.

--
Regards, Joerg

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Brushes in DC motors might short intermittently, and the ripple current (1) doesn't drive the motor (isn't required), and (2) might overstress a capacitor. A series choke is an easier solution than big capacitor, in this case.

He just needs a choke and load R ..

common problem.

Thanks! I'll get one of the CC limiting types and see how that fares.

>

But make sure to push the choke back in after 1-2 miles :-)

--
Regards, Joerg

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