Re: relay coil inductance

[amdx]

John

John,
I think you found his sensitive spot.
Mike

 

[Joerg]

A resistor reduces the L/R time constant in both directions. You of
course have to run the coil at rated current, which means you have to
increase the power supply voltage to make up for the steady-state loss
in the resistor.

Best is usually to switch this so the coil sees the highest possible
voltage across it (current is curbed before it exceeds the danger level)
and then, to shut it off, let it ramp up to a high but clamped voltage.

 

[Joerg]

Yep, As I previously posted...

http://www.analog-innovations.com/SED/NMOS_RelayDriver.pdf

You can accurately set a maximum flyback voltage.

What's the 150ohms doing there? Shoulda PWM'ed it.

R1 wastes energy, causes global warming ... )

 

[ehsjr]

A resistor reduces the L/R time constant in both directions. You of
course have to run the coil at rated current, which means you have to
increase the power supply voltage to make up for the steady-state loss
in the resistor.

John

Ahh! Thanks, that makes sense.

Ed

 

[Joerg]

[...]

What's the 150ohms doing there? Shoulda PWM'ed it.

That's the natural coil resistance of the RELAY. This isn't an SMPS.

Ah, ok. I typically PWM mine. But not with those boring commercial
solenoid driver chips <yawn>.

[...]

 

[life imitates life]

Algae. Small plants powered by sunlight.

John

No, dumbass. Algae is algae. Pond scum is fish feces. It is at the
bottom of the pond. The algae is up at the surface depths.

ALL plants are powered by sunlight. D'oh!

 

[life imitates life]

http://www.microscopy-uk.org.uk/index.html?http://www.microscopy-uk.org.uk/pond/index.html

That is what LIVES in the pond. The "pond scum" is the refuse and
corpses of what lives/lived in the pond.

 

[life imitates life]

John,
I think you found his sensitive spot.
Mike

I think that you are both MADE OF SHIT. You are both too goddamned
stupid to merely be full of shit.

Goddamned immature dumbfucks. No, there wont be a movie about you.

 

[life imitates life]

Dimbulb's family tree.

I came from the stars.

You came from Beelzebub.

 

[Herbert John \Jackie\ Gleason]

I'm amazed!

No, you're a trolling, dual core dipshit on Linux that thinks you are
"something else".

Clue for ya... You ain't all that, you sumbitch.

 

[Rich Grise]

Your fascination with poop - now fish poop - is really weird. Poop is
mentioned, often featured, in almost every thing you post.

That's really sick.

And he (or she) doesn't even know what s/he's talking about. First,
"algae" is plural, i.e., algae ARE algae.

And apparently he/she is unaware of the simple fact that "scum" is
what floats to the top, much like the political system. >:->

Cheers!
Rich

 

[Rich the Newsgroup Wacko]

http://www.wvu.edu/~agexten/aquaculture/pondscum.htm

Your talent for being AlwaysWrong is holding up nicely. As is your
affection for the by-products of life.

Cheers!
Rich

 

[Jamie]

And he (or she) doesn't even know what s/he's talking about. First,
"algae" is plural, i.e., algae ARE algae.

And apparently he/she is unaware of the simple fact that "scum" is
what floats to the top, much like the political system. >:->

Cheers!
Rich

yeah, what you said!

 

[Jamie]

Cheers!
Rich

I guess that puts it into prospective.

 

[life imitates life]

Your talent for being AlwaysWrong is holding up nicely. As is your
affection for the by-products of life.

John

Maybe that is why I tolerate total retards that do not even know how to
properly operate a vapor phase parts washer.

 

[life imitates life]

And it's sick that your keep feeding this troll.

I have to puzzle over troll feeders and why they waste everyone's
time replying to such obnoxious jerks. Are you lacking a person
with which to pleasantly correspond? Or are you just feeding your
own ego ?

...Jim Thompson

As if a fucktard like you has any clue as to what "pleasant
correspondence" is.

Back in your face, fuckhead.

 

[life imitates life]

"algae" is plural, i.e., algae ARE algae.

Since we do not normally gaze under a scope at a mere single specimen,
in any normal context, they will always get a plural reference, and
properly so. However, since we always know that we are referring to the
mass itself, the remark algae is algae would not be completely incorrect
as it generally refers to a cluster as a whole as opposed to the
technicality that it is several individual specimens.

I'll bet you think that "a bud" is only one flower as well, when in
fact, "a bud" is many many actual individual flowers. No need to
confirm... you know I just busted you. "A bud is a bud."?? No, but you
never said "a bud are a bud" either, didja? A bud is a cluster of
flowers. So, "a bud is a bud" is not completely incorrect. One is not
saying "those flowers are flowers". Essentially, what one is saying is
"That cluster is a cluster."

So that algae over there is algae. Works, as would the term "are" as
well.

So, it is YOU that doesn't know what you are talking about.

 

[life imitates life]

Cheers!
Rich

Lick my salty chocolate balls.

 

[life imitates life]

Note that you contradicted yourself.

You're an idiot.

Note also that you are an ignorant berk.

You're a retarded idiot.

Note also that you have no clue as to how inductive circuits behave.

I was playing with using old car generators to power my go-carts and
playing with automotive coils and rebuilding lawn mower engines before
you were even born.

I know what a flux field collapse spike is. Your father must have
zapped you upside da haed a few times. You act like you have had to much
electro-shock therapy in your life.

 

[life imitates life]

The relay will drop out only when the coil current falls below the
hold-in current. Any suppression method allows the coil current to
gradually decay to zero and must lengthen the drop-out time.

Wrong. You're an idiot. A diode does NOTHING to reduce current via some
gradual decay, you dumbfuck.

It is a surge device, It eats the entire current, at its maximum rate.

That is not decay, you stupid ****.

The relay coil would drop out immediately by your retarded definition
because the current is removed instantly in most wave forms from the
drivers. The diode clamps the collapsing field's spike. That spike has
no energy to provide the coil with anything that keeps the latch plate on
it.

So you not only know nothing about the "inductive circuit", you also
know nothing about the mechanical operation of the relay assembly either.