Guru
Joined: 13/10/2014
Location: AustraliaPosts: 1845
| Posted: 01:19am 28 May 2023 |
Found something stuck to my head 20 minutes ago.
The only spanner in the works, I could not really disconnect the House loads, but they were only around 400 watts when I did the 10 minute test, so, almost all of the load was resistive.
Inverter running at just under 7kW for 10 minutes.
Peak DC input current swing 263A.
AC current 30A
AC voltage 227.7vac.... It is exactly the same voltage at idle.
BELOW:
Everything looks good to me: Toriod obviously silent.
Blue: AC ... Yellow DC input current.
The heatsink on the back of the cabinet:
It's the same temperature as the FET heat transfer mounting blocks, so I'm 100% happy with the method I used to couple the FETS, temperature went from 28 to 31 deg after 10 minutes at 7kW. There is ZERO fan cooling.
Toriod went from 31 to 35 deg after 8 minutes at 7kW, stayed there as the fans came on and off for a just a few seconds at a time, turned on 3 times.
I must change the Fuse block at the input to the inverter - dam thing gets hot - as in burn your fingers, will try a DC/AC breaker the others are using.
I need to redo one connection to a chokes and one on the input, they get quite warm, the rest are fine.
The Contactor on the inverter: The terminals are the same temperature as the coil and housing, a result of a small holding current in the coil, warm to touch is all.
All DC and Toriod connections on wiseguys power board are only slightly warm to touch, I've been checking them under every heavy load, they appear to be a real quality high current screw connectors, board warm slightly after 10 minutes.
The rest of the external Battery supply chain, interconnects, fuses and breakers are at room temp.
I think that's a good effort for its first run at a high constant power level, even if it was only for 10 minutes - small steps!
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Edited 2023-05-28 15:18 by KeepIS