Re: MOT Powered SSTC - First Tests Successful!!

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Dan,

At 02:55 PM 3/29/2003 -0500, you wrote:
>.............
>
>My new SSTC works exactly the same way as the typical full-bridge driven
>SSTC except it uses a much simpler, series stacked FET array to switch high
>voltages.  Its an extremely
>simple design as well although the FETs, and some of the high voltage
>resistors are fairly expensive.

Very interesting!!!  Stacking FETs is not easy, but it looks like this 
works very well!



>I performed my first test this morning and the results are spectacular.  My
>switching frequency was about 190kHz, input power at about 2kW but limited
>to only 75% of rated output
>voltage of my 2.4kVAC MOT (microwave oven transformer)  Using the MOT, which
>is half-rectified (no filter capacitors), output was well over 30" !   I
>didn't go to 100% as with only a voltage rating of 4000V across the FETs and
>3600V across my TVRs, 2.4kVAC half-rectified would be pushing it a bit.  I
>may add a fifth FET when I get finalized PCB artwork done for this design
>(right now I'm using prototype brass-board).
>
>Here is my current high voltage switch schematic which is placed between my
>primary coil and ground.
>
>http://www.spacecatlighting-dot-com/datasheets/sstc3_sch02.pdf
>
>I'll be posting my system schematic, oscillator gate driver schematic, and
>pictures soon.

Looking forward to seeing more details of this!!

Cheers,

         Terry



>The Captain