your blocking diode and why you need it on DCPM Motor
Note this does not apply to a TLG-500 and is only needed
for DC motors.
Blocking diodes work just like a
water check valve works in a water line except it controls the
direction of flow of electricity.
If you do not have a blocking
diode in the DC Generator circuit your generator will run like an
electric motor thus eating up as much if not more than what you
generate when the wind dies down.
All diodes have a marking on them
that shows the direction of current flow.
That mark looks similar to this. >|- .
In this illustration of the diode the current runs through it from
left to right, out the pointed tip through the vertical line
and out the little wire.
On some diodes there is just a band or ring around one end. On
those diodes the ring or band side is the side that goes to your
Thus you would install it like
can be installed inside at the batteries.
From the generator you would hook
to the positive output wire to the >
side marking on the diode.
The other side that has the little line -
going out goes to your
MAKE SURE you are hooked to the
positive output wire.
From the Generator you have two wires.
One is the positive output wire.
This positive output wire commonly ends up being the negative
(black or brown) wire from the generator.
This happens because the DC motors we use for generator when
hooked up red or white to positive and black or brown to the
negative they turn CCW (counter clockwise) most blade systems
rotates the motor in a CW (clockwise) direction therefore what was
the negative wire is now your positive wire as a generator.
A volt ohmmeter will help you decide for sure which wire is actually putting out the positive current.
Do NOT try to use several small little 1 Amp diodes to try to
make a bigger diode. It does not work that way and here is
The most important reason to not do it is this; if you put together
10 diodes in parallel you would have a functioning diode for a
while... But not for very long.
It is almost impossible to get diodes that match perfectly. So
when you put 10 together in a ball this is what happens.
The diode that fires soonest at one amp of current will begin a thermal
process, and as it warms up it will come closer to a short hogging
even more of the load by itself. Although the diode may be
acting rough and tough it is still only a one amp diode and very
soon will get tired carrying all the load by itself and will open up
or pop if you will, then you will only have 9 left. Then it
will be on to the next diode and so on and so forth until all you
have left is 10 burnt out diodes and a free wheeling generator that
is not putting anything in your battery. This process of one
at a time burnout can be pretty fast if you have a good windy
You need to buy ONE single diode and make sure it a high enough
amperage diode to handle the job otherwise it will just burn up.
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