Steve , I actually thought about this and wondered if it could work. It is a Boyce G board I want to use. This board is able to reach a wide range of freq. and duty cycles. The IRP540Z fets switch fast and sharp. It is already optoisolated. Its only downfall is a duty cycle over 35 - 40 % on time will heat up the fets and burn them up. No schematics are available for the G board, but a detail view of the board itself, top and bottom can be viewed at the Hydrogen Garage site. You might swap out the fets and isolate the input from the rest of the board but that might be beyond what I know how to do.
Hi Nickranger,
I had a look for you on the Boyce schematics.
Please read what the current wire description is:
TB2 has 3 connections as follows;
Output 1 is connected to the cold side of primary 1.
Output 2 is connected to the cold side of primary 2.
Output 3 is connected to the cold side of primary 3.
The hot sides of primaries 1, 2, and 3 are brought together, and connected to
the 13.8 VDC power supply positive connection via heavy guage wire, through a 20 Amp fuse or DC circuit breaker, the contacts of a heavy duty (20 Amp or more rated) power switching relay, and a heavy duty choke.
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My comments:
If you use the IRF540Z mosfets, then you can go up to max 100V.
A 1000V with same specs for amps like the irf540, is difficult. Options are possible within the IRF range mosfets, like the IRF840 (500V by 8 amps)
or the FQA8N100C which does 1000V by 8 amps.
All can be put into your BB board.
Now, in stead of connecting the hot sides of primaries 1,2,3 to the 13,8v powersupply, you hook them up to the 1000V powersupply. Just make sure that the negative of that 1000V powersupply is also connected to J3 pin 1.
Thats all.
Steve
http://hydrogengarage.com/pwm3g/pwm3g.htm