Replacement Trace SW FET Power Board

[davidbrady]

Hi Ronsine,

Welcome to the forum and thank you for the compliment. The RMS line voltages and frequencies are read from the 32KB EPROM; i.e., the EPROM at the center of the control board. My SW4024 powerboard uses On Semiconductor MOSFETs part number: HUF75345P. May I ask what FETs your inverters are running? 200A continuous with intermittent peaks to 400A is easily achievable with this board in an SW4024 chassis. Your 2612 has a continuous power of 2600VA which gives you a DC amperage of around 200A; my powerboard should be fine in this application. I think the 300A spec is for 11.8V, 85% efficiency, and 125% NEC CB, which is very intermittent if occurring at all. I suspect Trace used the same Powerboard in many applications, with possible minor tweaks to the driver cards. I find one of the beauties of the Trace SW series design to be the abundant thermal headroom; i.e., Trace SWs run cool, as compared to high frequency inverters, which allows the Trace to monitor temperatures closely and apply excess power generously. I think toroids would be a great solution. I haven't yet spent anytime analyzing the magnetics. If you want to pick up on that task that'd be a great help.