Inverter HIGH voltage shutdown
This is a new one to me. Simple plug-in 400W inverter my wife uses in the car to charge/run her computer. Has worked fine over the last 9 months. But just recently during the cold spell, it complai...
Forum Discussion
DrewE wrote:
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With a bridge rectifier wired up in the usual (obvious) way, with the "DC Output" corners going to the inverter and the "AC Input" side to the power supply, at any given time two of the diodes are forward biased and two are reverse biased.
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8A implies a bit under 15W of power dissipation. A heat sink of some sort would seem to me to be a good idea.
Thanks. I see it now, but it took a while. One of the two diodes in series is on the neg battery side and the other on the positive.
And that link I posted above shows a rather large extruded Al heat sink built into the rectifier.
DrewE wrote:
Parallel connections do not come into play here as they would for resistors; diodes are by design not ohmic. Two forward biased diodes in parallel still have the same 0.7V drop, but each one carries (ideally) half the current. It's the same idea as putting two batteries in parallel; the voltage stays the same.
Thanks again. Didn't realize that.
