Current Transients -- Choke?

I am modulating power to a pump (power on and off) and when I am doing
this I am seeing dips in the input voltage to my power regulators
(Vin) on other parts of my board.

What is the best approach to guarantee that my Vin won't dip during
these current transients caused by my pump? I added some larger input
and output capacitors that helped a little but didn't fix the
problem. Should I be adding an inductor/choke to help with this? How
should I be calculating what type of inductor to use?

Thanks in advance for any info!

 

Yes, an inductor can help. But not really if the on/off cycles are
longer than a few hundred msec. And be careful since inductors generate
nasty spikes upon a load dump.

You can use this tool to see the effect of various sizes of inductors:
http://schmidt-walter.eit.h-da.de/smps_e/hgw_smps_e.html

Just pretend the transformer isn't there. Or throw your circuit onto
LTSpice. Another trick is to tap the heavy motor current off before the
regulators to the other parts of the board.

 

There you guys in Europe have it easier. Schmidt-Walter's site favors
Siemens cores, or now Epcos. Not that popular out here in the Wild West.

 

"blanko"

** Huh ?? So what ?

What do you think voltage regulators are for ??

** Just ignore them.



...... Phil

 

"defaulty brain **** "

** So it is not the case -

you

ASININE ASD FUCKED FUCKWIT !!




...... Phil

 

The old radios actually had a polarity switch. Most of Europe's cars
were negative ground but some French models were not.

 

He doesn't say if the regulators are dropping out with the dips. A
low forward drop diode and large cap on the critical supply can serve
to decouple the PS dips. I'm running some servo motors from the same
unregulated supply as my op amps and used that technique with good
results.

 

defaulty brain dead **** "


** So it is not the case -

you ASININE, ASD FUCKED FUCKWIT !!



...... Phil

 

Set your PC's clock correctly, you idiot.

 

or he just doesn't say

you pusillanimous bag of feces

 

"default" <>



** Is this psychotic dude a kiddie fucker or what ??

 

**** you, you retard.

Set your goddamned wristwatch 5 minutes fast, not your PC, you stupid
dumbfucktard.

 

You have a nice day too. Any relation to Phil?

 

5 minutes fast is close enough

 

Sorry Phil, I left out "sack of odiferous canine feces."

Have you thought about seeing a shrink about your personality issues?

I tend to think that empathy, compassion and understanding are
survival traits - humans developed them as an extension of cooperation
for survival of the group. If you are without those qualities, it
makes you underdeveloped or perhaps a mutation.

Do you go through life hating everyone around you? Seems like you
must.

If you weren't a bully and coward would you be a serial killer?

If you are a mutation, you might save evolution the trouble . . .