power inverters

hi junior, thanks for your reply. huh, cool! first time i've heard of these redilines. neat! hey, if you don't mind me asking, two more questions, "true sine wave" means that you can run computers (etc.) on 'em, right? and, what's a "psd"? (looked on wikipedia and it said "abbreviation for "personal storage device", which would be a computer, no?)

thanks.

bill wixon

"Junior" snipped-for-privacy@home.com wrote

Oh some guys gotta pick at everything! lol...

Some folks use E to indicate a voltage source and V to represent the voltage across a load of some sort of load. To me, it has no practical value to call (V)oltage "E" when I use V for some many other places, such as 24VDC. Why would I bother referring to a potential as E = 24VDC?

Can't remember for sure but I thought that "I" referred to the (I)ntensity of the current. Is it that simple? Is anything ever that simple?

I don't feel like I have enough brain cells left to waste on things that have no practical value in my work. This did entertain me over my lunch though!

Stephen N.

On Thu, 06 Apr 2006 19:25:15 +0000, Stephen N. rearranged some electrons to form:

Physics, my ass. The first thing you learn in electronics is ohm's law. P=IE

Yes, you can run computers on it. Generally a modified sine wave will not run a refrigerator or air conditioner. These little units are great. We ran one for years in a cement laden atmosphere. When we bought it, I also purchased a set of brushes, as I knew they would not last very long with all of that abrasive dust. Twelve years later, the new brushes were still sitting in the supply room. If you decide to buy one, try to find one with the GFI outlet, as a conversion will run you another $50.00.

PSD = PowerStroke Diesel. I guess you forgot that you were in a Ford group.

On Fri, 07 Apr 2006 00:06:22 -0400, Junior rearranged some electrons to form:

I guess you need to take that class again... Ohm's law is V = IR

You two are fighting over semantics.

Yes it should be E, not V, but every other site switches. NASA uses V. All of my grandfather's (who was a master electrician for the Newton Falls Paper Mill for over 35 years) books, some copyrighted in 1935, that I have use E, as did he when he taught me. And if you really dig you canl find some sites and books that use U.

You got a mix up here. Ohms Law is E=IR for voltage I=E/R for current R=E/I for resistance V sometimes used instead of E, for that mater so is U used in some books

Now then P is used in a whole different formula that is related to Ohms Law for power P=E*E/R Power = 24 watts = 12*12 volts / 6 ohms or P=I*I*R Power= 24 watts = 2*2 amperes*6 ohms or P=E*I Power=24 watts = 12 volts * 2 amperes

this is a good basic page

Whitelightning.

"E" is the correct term to use not "V". E= I over R, not V = I over R. E kinda stands for "electromotive force" which is aso known as "voltage " or "potenail".

----------------- The SnoMan

On Sat, 08 Apr 2006 20:35:19 +0000, SnoMan rearranged some electrons to form:

No one in the practical engineering real world uses "E" to represent voltage.

On Sat, 08 Apr 2006 20:35:19 +0000, SnoMan rearranged some electrons to form:

PS: If you're going to pontificate, at least get it right:

V(E) = I times R (Ohm's law)

E= I over R (Snoman's folly)

I guess you & Junior better go get your money back from that Radio Shack class you took.

The term to use is what those of us who use it in the real world call it, not what someone wrote in a text book a century or two ago. It is nothing but tradition that compels some people to continue to use terms that have long ago lost their practical meaning.

You call it what you like and those of use who engineer electrical/electronic systems will continue to use V, as usual.

Stephen N.

maybe its because the person who discovered it, proved it and published it called it that?

I love arguments like that. I hear them a lot in Florida, only the words they use are "We don't care how you did it up North" And then we who they are directed at look at bridges that don't line up at the end in the middle, with main support piers cracked so bad you could stick your hand fisted half way up your forearm in, or on another engineering project, the elevated road way that collapsed before the first car went over it(guess its really lucky it happened before and not on "opening" day).

Whitelightning

Oh my god, you really think it matters! Okie dokie, you're right, thanks for correcting me.

Stephen N.

Naw, they just keep changing the conventions to confuse everybody. Heck, when I was in school, current still flowed from negative to positive. Not anymore.

RCE

It all depends upon how you want to look at it. Negative to positive is called "Electron Flow" and positve to negative is called "Hole Flow". The net effect is exactly the same regardless of how you do it.

What a child! Keep it up is it makes you feel good andf gives you a cheap thrill, like you have never had a typo. It was supposed to read I= E over R. The only folly here is you looking for cheap thrills by trying to be little others. I have little doubt I was using these formulas plus a LOT of other ones before you even knew what they were. I was building HF radio equipment in the 60's how about you?

----------------- The SnoMan

True. But my electronics courses consisted of vacuum tube theory. Hole Flow didn't come along until transistors and PNP and NPN junctions. The scientists had to come up with another theory because electron flow being neg to pos didn't work out when dealing with solid state devices. Cracks me up.

RCE