RE: Bulk Order 15kW SSTC Boards

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

Original poster: jimmy hynes <chunkyboy86-at-yahoo-dot-com> 

Hi,
The IGBT is only slightly slower though. What about an IGBT like 
HGTG30N60A4D? That one's rise +
fall time is shorter, but has a little more delay. It seems like the 
difference in switching speed
is minimal.


--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > 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?
 >
 >


=====
Jimmy