RE: Bulk Order 15kW SSTC Boards

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

Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com> 


IGBT's are still slow devices.  Also, at 100kHz, you would typically
only run this device at about 5-8A current.
Even so, even though I may build a coil to run at 100kHz (which is a
relatively big coil for a SSTC), others might
want to run at 300kHz etc...

I'm no longer building the 15kW boards due to lack of orders and minimum
quantities etc..., but am about completed
the redesign of the PlasmaSonic II SSTC which is designed for up to
10kW.

Dan



 > Hi Dan,
 >
 > Why are you going to use IXFN44N50 MOSFETs? They cost $17.42
 > each, while a
 > IRG4PF50W IGBT costs
 > $4.43 from the same place. The IGBT is rated for 900 volts
 > instead of 500,
 > 51 amps instead of 44,
 > and also has less gate capacitance.
 >
 > They do take about 100ns (40%)longer to switch, but if you're
 > going to make
 > a big coil the
 > frequency should be down anyway, right?