NON INVERTER Small Engine Volt Reg Schematic
After pricing a Chinese voltage voltage regulator at $217.00 + tax for a 6,500 watt Sears and Bankrupt generator I find myself using a heat gun to strip the potting and ...
Forum Discussion
- I have forgotten too much of my electronics. What is the purpose of the exciter and bridge. Just to kick start the field at start up ?
- Yes it starts the magnet in the field.
- An ultra high quality soft iron rotor tends to hold residual magnetism. But even then, generator techs always carried a 6 volt lantern battery. Remember them? They had two coil spring terminals on top and they were connected a a pair of wires to flash the field.
I am hoping (praying) these regulators have one or both full wave bridge rectifiers failed and not the power or driver transistor. We shall see. MEXICOWANDERER wrote:
An ultra high quality soft iron rotor tends to hold residual magnetism. But even then, generator techs always carried a 6 volt lantern battery. Remember them? They had two coil spring terminals on top and they were connected a a pair of wires to flash the field.
I am hoping (praying) these regulators have one or both full wave bridge rectifiers failed and not the power or driver transistor. We shall see.
EGADS I am getting old. Q2 - Q3 is a Darlington?MEXICOWANDERER wrote:
MEXICOWANDERER wrote:
An ultra high quality soft iron rotor tends to hold residual magnetism. But even then, generator techs always carried a 6 volt lantern battery. Remember them? They had two coil spring terminals on top and they were connected a a pair of wires to flash the field.
I am hoping (praying) these regulators have one or both full wave bridge rectifiers failed and not the power or driver transistor. We shall see.
EGADS I am getting old. Q2 - Q3 is a Darlington?
yes, those are connected as a Darlington pair..
I'm old too... hav'nt messed with that stuff for over 30 years.
I'll wager fifty pesos that the culprit is D1 !- Wish me good luck with the zener. Sucker buried in potting and bet there's no readable markings on it. I need to get my hands on that rotor and get a definitive resistance through the bobbin. Then start working backwards. Power Q driver Q, voltage divider and pot. God ain't this fuuuun....?
OldSmokey wrote:
yes, those are connected as a Darlington pair..
I'm old too... hav'nt messed with that stuff for over 30 years.
It could be 2 transistors, but "back in my day", they would be made up as one and called a Darlington.
Now a days, that would be a MOSFET and D2 would be the body diode.
