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PWM
Controller
Heavy-Duty
DC Motor Controller
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Made Specifically for the Hydrogen
Injection Community
When we purchased our 3rd, 4th and
5th PWM Controller from a popular auction site - and they all blew smoke,
we knew we had to build a Heavy-Duty PWM Controller meant for
continuous use to control on-board hydrogen generators. It
took us much longer than we anticipated to design it, but we have
finally perfected and released our 12v 0-50a model.
Get Yours Today $99.95 + $14.95 S&H
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12v 0-50a PWM Controller
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In order to simplify the
design and thereby the costs associated with building a pulse
width modulated pwm controller, we chose a controller chip
that was designed specifically for that purpose. Some of
the advantages are: a built in five volt regulated power
supply to allow accurate current and temperature
measurements; several built in comparator inputs for
pulse width control; dedicated shut down input for safety
switch monitoring; and a built in oscillator. Since all
of this is on one integrated circuit (ic), the circuit board
doesn’t need to contain a lot of parts which are all potential
failure points. We also use a dedicated high
amperage mosfet driver ic. We have successfully tested
it on our controllers controlling from four 62 amp mosfets to
fifteen 62 amp mosfets which is over 900 peak
amps! Also we only use components that are rated
to at least 105c or 200f even though our circuit board
should never come close to those temperatures. |
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PWM Controller Heatsink with
Mosfets
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Another way we have tried to
simplify our controllers as well as assuring a cool running circuit
board is by not only isolating the main heat generating
devices ie the mosfets and freewheel diodes, but also
the circuits that carry the power to and from those devices.
If you look at how most pwm controllers are
built, you will see that the power to and from the mosfets and
diodes is carried on the foil traces located on the circuit
board. Not only does that require huge copper
traces and in some cases a great deal of solder being added
to handle the current, but the circuit board is being used
as a heat sink. In addition to heating up the
components on their circuit board, often times the traces
still aren’t heavy enough to carry the current that the
mosfets demand so they just plain melt. As you can see, there
is more to adding additional power in those designs than
installing larger amperage mosfets since the circuit board is
the weak link. |
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PWM
Controller Running
(2) 2LPM
HHO Generators
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Another advantage our controllers have is the ease of
upgrading for more power even though you shouldn’t need to
since our smallest controller for HHO generator use contains
(four) sixty-two amp mosfets for a peak of 360 amps or 60 amps
continuous. Another side benefit from this design
is that if something catastrophic happened and burned up the
mosfets, no damage is done to the circuit board. Imagine
that. Something electronic that is made to be repaired
instead of thrown away. |
| Get Yours Today $99.95 + $14.95 S&H
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