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Problem with inverter
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7
comments (7 topical, editorial)
Re: Problem with inverter
(
3.00 / 0
) (
#7
)
by Opera House on Tue Aug 19th, 2008 at 02:41:11 AM MST
(
User Info
)
I buy defective inverters and repair them. Usually when the output shorts, they go into a safe shutdown. Here is an easy way to check the FETs. Use a digital ohm meter and measure resistance between the two outside legs of the FET. Under a couple ohms is a defective FET. These generally have about a 100 ohm resistor isolating the gates of parallel FETs. The gate almost always shorts in a failure. In the H bridge output, the defective FET can be just wiggled till the leads break. Generally two fail at a time. You can now use this no solder repair at half the rated power. Failure on the multiple boost inverters can be trickier. A short on these FETs can often take out the gate driver transistors.
Problem with inverter
|
7
comments (7 topical, 0 editorial)
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