Exploring the Inductive Resistor Heater

[poynt99]

It appears Lane is simply here to troll again. I've had similar dealings with him in the past.

He's clearly demonstrated here that he has no intention of having a reasonable discussion.

[TinselKoala]

That's clear enough. But what do you expect from that crowd of mutual apologetics?

Remember this blast from the past?
http://www.youtube.com/watch?v=P8AIRkWF55k
What is the correct circuit diagram? Where is the Black lead from the function generator located? Why was one battery removed in the second half, leaving only 48 volts, when the claim is made that the circuit AS SHOWN can withstand 72 volts input?

[picowatt]

Sorry, I posted in the wrong thread...

[SeaMonkey]

Desulphators supposedly produce finer grained sulphate crystals effectively increasing plate area.  As well, pulse and reverse pulse plating similarly are known to produce finer grained structures.  Visualize large clumps of sulphate crystals forming at the plates as opposed to a much smoother, finer grained structure.  As well as an increase in surface area, less resistive losses occur over the finer grains.  This is, supposedly, how a desulphator functions, and the waveforms used to desulphate have much in common with the waveforms of these OU circuits.

Lead Sulfate is the normal electrochemical
product of battery discharge (lead-acid battery)
as the Sulfuric Acid electrolyte combines with
the active materials of both the positive and
negative plates.  Initially, the lead sulfate crystals
are very tiny and nearly amorphous.

If the partially discharged battery with such lead
sulfate on the plates is re-charged immediately
and fully that lead sulfate will be almost completely
converted (by electrochemical decomposition) back
into active plate materials and regenerated sulfuric
acid.

If, however, the partially discharged battery is left
unattended for some time the lead sulfate crystals
will begin to undergo a phase change to become
larger "hardened" sulfation which will resist conversion
back into active plate materials and regenerated
sulfuric acid by normal charging voltages.

Typically, this hardened sulfation will gradually increase
in volume and mass as the battery ages and will deprive
the plates of active material capacity.  The battery becomes
weak with reduced capacity and will not hold a charge.

The desulfator circuit applies to the battery very sharp
and very short pulses of considerable overvoltage at
a frequency of about 1000 Hz.  The higher than normal
voltage is necessary to rejuvenate the hardened sulfate
crystals by decomposing them back into active plate
material and sulfuric acid; thus restoring the integrity of
the plates to near original condition.  The plate area which
had been lost to the hardened sulfation is recovered and
made available for normal discharge/charge cycles.

It is a slow process which evolves considerable heat and
there are invariably some losses in the plate structure,
especially with automotive batteries which are by design
much less robust than a deep cycle battery.  But if the
battery hasn't sustained significant damage to the plate
structures substantial capacity and usefulness will be restored,

Fortunately, desulfators are easy and inexpensive to make
and they can be very effective.

"Reverse Pulse Plating" is a unique process which is similar
to "burping" a battery during charging in order to reduce
the buildup of dendrites.

Regarding the matter of inductive discharge, it was long
ago discovered that a free-wheeling diode across a DC
Motor which is pulse driven both reduces the possibility
of transient generation and significantly increases the
efficiency of the motor.

It stands to reason that a free-wheeling diode placed
across an inductive resistor would produce the same
result when pulse driven.

[SeaMonkey]

Why are you keep repeating some trivial common sense which you pretend that I don't understand?

They do it because they are unable to resist the
temptation for mischief.  They quite literally are
unable to help themselves.  The adrenaline rush.

Boys will be boys!

Will Rosie ever come back to put them in their
place?