Good points about the capacitive fed battery
charger/rejuvenator circuit.
Rather than the Full Wave version with its
increased safety liabilities, the Half Wave
version is somewhat less hazardous and
equally effective.
Naturally, it would be best to use an
isolation transformer. For use with
12 Volt batteries a 12 Volt transformer
is quite effective. Since the circuit is
effectively a peak voltage doubler,
(the half wave circuit) it will deliver
pulses of about 30 Volts to a badly
sulfated battery which is usually enough
to get the rejuvenation process underway.
Just assure that the capacitance is sufficiently
large to provide the desired pulse current
for charging/desulfating a fairly healthy battery.
For desulfation only, a smaller capacitor is quite
effective. A switch could be used to allow both
modes of operation when desired.
To sharpen the pulses an SCR may be used instead
of a Diode to apply the pulses to the battery. A
potentiometer can be used to adjust the Gate
Potential of the SCR to enable firing at or near
the voltage peaks.
A diagram would be very helpful to show how the
circuit would be configured. I'll work on a diagram
but it may take a day or two since my scanner is
not immediately available. Perhaps someone here
will beat me to it...
TinK,
The link to
The Power Supply page is a great reference.
The info there on the R-78XX-0.5 switching replacements
for the 78XX Analog Regulators is especially interesting.
Data on those and their other switching products
are included in the attached App_Notes pdf.
It's a good resource and tutorial.
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Topic: Another look... (Read 17218 times)
