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Re: IGBT Recommendations

Original poster: "Andrew Bonnell" <andrewbonnell@xxxxxxxxx>

Forgot to attach my name again...


On 5/17/06, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: "Andrew Bonnell" <<mailto:andrewbonnell@xxxxxxxxx>andrewbonnell@xxxxxxxxx>

Does anybody have any recommendations for an IGBT to use in an ~1800VA DRSSTC?
On a DRSSTC is it better to go with a higher voltage to get lower
losses due to I*I*R?
On Richie Burnett's page, his experiments with a DRSSTC (driven by
MOSFETs) showed that when the bridge is fed with a half wave from a
half wave rectifier, the TC buzzes at 60 Hz and when it is fed full
rectified power, it buzzes at 120 Hz.  If you place an IGBT on the
power rails feeding the bridge, could you make the TC play music by
pulsing power to the bridge through the IGBT to feed the bridge a
wave form of a specific frequency to make the coil "buzz" out the
music so to speak?

           audio signal                    |
                   |                            |
  -________IGBT_____________ |