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 PWM Controller Heatsink with
Mosfets
Heat-generating mosfets
are imedded into the heat-sink which is seperate from the
electronic board. Our controller is designed to run on a
constant basis - perfect for use with hydrogen
generators. |
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. |