Adding a ripple to a DC voltage

Uh-huh, you don't need a reason to be classified as worthless.

This coming from washed up geriatric low-level maintenance idiot from Texas...

This coming from a loser whose only remaining aim in life is to post crap. And, you're right - I don't need high-level maintenance like you.

That suggestion is antique, simplistic and almost demented.

No one really cares what you consider to be "crap"- you're a pathetic little nothing narcissist who thinks the whole world is accountable to him- well wake up- you just don't matter.

For a one-off? Why?

Cheers

Phil Hobbs

Granted. What does make you worthless?

have to draw it. this?

DC+ --+------>|----+-- | | `-->|--uuuu--' ====== mmmmmm --' | AC ---------'

The old MOT with the secondary removed and replaced with three turns is one way to do this.

Another way would be to put an emitter follower with a good heatsink in series with the DC supply,

Another way is to charge using an alternator with one diode missing and put a low resistor in series with the battery.

-- umop apisdn

build a test bench). The current is about 30A. I was wondering if a transfo rmer in serie with the battery could do the job.

He can adapt a high effciency switching converter to PWM a much lower rippl e frequency voltage on the battery without significantly affecting the seri es impedance or wasting lots of power. And there's no problem finding high frequency transformers that take the 30A DC.

Any similarity at all to your practices, "liestyle" and beliefs...

But it's a one-off, Fred. Engineering time matters.

With a transformer, the OP will be on the air in minutes. The series impedance isn't going to be a big factor, I shouldn't think, not with a

Cheers

Phil Hobbs

I can help with that. I've got exactly that alternator sitting right here. I think it has about 2 vpp of ripple, but I don't recall exactly. I did drag the scope out to the truck to see for sure and yup, it was there. Once I got it apart I could see the burnt remains of one diode. No way to replace just one that I could see and the bridge costs over $40. A used alternator was no more than that *with* the shipping. Got a spare one of those with a bent pulley too.

No one really cares about your opinion of others. If I don't matter, why reply to me? Can't help yourself, right? Narcissist? That's you, for sure. It's a shame you are still robbing better people of air.

For two people who say they care so little about each other you can't seem to stay apart. If this were a TV show you'd end up in bed together... or had already been there...

As they say in Texas:

A man has to believe in something. I believe I'll have another beer.

with s***ty filtering and just add it to the battery voltage. If they want ripple, which is obviously to be able to tell if a device is vulnerable to ripple, they are not worried about an extra volt. So three volts AC, minus two junction drops per the bridge rectifier will give you about a volt lef tover.

Get a 300VA toroidal tranny and wind your own secondary on it - use damn t hink wire or wind turns in parallel to get about 2.5 volts rms ( probably a round 25 turns) and connect them to a 40 amp bridge mounted on a heatsink.

Battery plus to bridge minus and then bridge plus to the load.

The bridge eliminates any DC component in the tranny and gives a ripple fre quency twice that of the AC supply - which IS what you need.

.... Phil

You're a dull little parrot, never had an original thought in your life...take your adolescent mentality and go away, useless.

te:

o build a test bench). The current is about 30A. I was wondering if a trans former in serie with the battery could do the job.

worthless at electronics and always have been.

incompetence on the design of a the high voltage indicator.

ten level here.

are powered by PV as their only energy source that do just fine and withst and all kinds of abuse in handling and operating environment, so you're dea d in the water on that criticism. Gawd only knows how your demented mind in terprets "dead in the water."

PV was and remains out of any considerations on the projet ; remember that it is working in a VERY harsh environnement (not even on electrical aspects but on mechanical accelerations)

This project was delivered in november (Huyndai Rotem) and has passed all I EC 61000-XX tests ; 50 prototypes are in service at this very moment. The s imple architecture is built on 7 MOSFET's I generators in series (based on ideas from Larkin and others may be JT i did not remember) but you ! you ar e are always on sterile and poor criticisms ! you blog bloogy.

Habib.

PS : Why not ignoring my posts when you have obviously no valuable ideas on electronics ?

Don't pay any mind to Blogs, he most likely moved back into his parents basement years ago, if he ever left.

He gets a little upset with those that can actually do something, instead he blows off steams and turns into his usual data collector, copy and paste approach, much like Slowman does. No one is correct in any assertion made except them.

In the profession, we call them SE's, " Shoulder Educated "

Jamie