Newer designed inverters
Anyone who has spent some time on eBay has seen the incredibly low priced Chinese inverters. Some of the spec are out right lies (5000W output using a 12V battery ? Right. Sure.) But there is a sp...
Forum Discussion
MEXICOWANDERER wrote:
The measure of a good inverter is accurate trouble-free operation for many years. And I gotta de gnus for you...designs that utilize good old fashioned heavy weight copper-wound transformers are light-years more reliable over the long run.
I agree with the first half of your statement adding "at a reasonable cost", but I disagree with the second half.
MEXICOWANDERER wrote:
Truly sturdy solid state synchronous inverters are nightmarish expensive.
In a former life I was a EE. Recent improvements (> 2 years) in power MOSFET transistors, mean less losses to heat. The big win are dedicated integrated circuits that handle the "bulk" of the conversion ( 1) stepping up to high voltage, 2) making a true sine wave)
MEXICOWANDERER wrote:
One does not build reliable solid state electronics with borderline voltage and capacity rated components. I elected to go with 350 volt 680 ohm Panasonic capacitors instead of 200 volt originals, Bi-Polar transistors rated 33 amps at double the voltage, and 80 amp 150 volt Schottky rectifiers rather than the original 20 amp 100 volt TO247 devices. Wanna shock? Price the difference. Wanna bigger shock? Have a Megawatt go bad 2,500 miles from the US border.
So you DO know a thing or two about what is going on inside !
What is wrong with Power MOSFETs over bi-polar ? Sized properly (or I should say "over sized" properly) there is no reason why they should not last as long a a bipolar transistor.
MEXICOWANDERER wrote:
But alas for techo-addicts it has a heavy-assed copper transformer.
I'll buy stock in copper mines.
