Electronics > Projects, Designs, and Technical Stuff
Petrol Generator Mod - Inverter AC Output
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WanaGo:
Measured 10 times or so, the highest I saw the meter read was 7.5A on startup.
It however is a UNI-T UT210E, so the update rate is not very fast, and there doesn't appear to be a MAX type feature. So I don't think this is really indicating the true current surge.
james_s:
It takes only a very, very brief excursion outside of the SOA for a mosfet to fail.
WanaGo:
Yeah. So do you think the NTC idea will be OK?

Speaking to the engineer of the company that makes the driver boards for these things, again, he suggested 2x NTC 10D-20 in parallel should do the trick.
10ohm 10A steady, 20mm diameter, in parallel making it 5ohm 20A capable I guess.

Should restrict to about 220V/5R=44A, which the FET's I think can handle, as they are rated to 47A continuous @ 25C.

Thoughts?
WanaGo:
https://www.ametherm.com/inrush-current/inverter-inrush-current-protection
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