T
Tim Williams
- Jan 1, 1970
- 0
I recall someone asked to see video of a polyester capacitor in the throes
of death. Well here you go (plus some narration).
http://webpages.charter.net/dawill/BurningCapacitor.wmv
Somewhere around 50kHz. The (smaller) capacitors in question are
Cornell-Dubilier DME's, 0.1uF 400VDC. As you can see, they are insufficient
for induction heating service. ;-)
The load is a single 1/2 x 1" strip of titanium, you can see it glowing up
to about orange heat (1600°F or so).
Oh, and this is also proof of concept for the new induction heater circuit-
I'm using the regulated power supply, oscillator, high and low side drivers
and a UC3842 flyback converter for the high-side supply (which is regulated
by an opto, not very long term stable since it depends on CTR, I should fix
that some day).
Speaking of which:
http://webpages.charter.net/dawill/Images/Induction713.jpg
Rise and fall times are on the order of 0.5us, with the sextet of
STW11NB80's. Gate waveforms are +10V ON, -5V OFF.
Tim
of death. Well here you go (plus some narration).
http://webpages.charter.net/dawill/BurningCapacitor.wmv
Somewhere around 50kHz. The (smaller) capacitors in question are
Cornell-Dubilier DME's, 0.1uF 400VDC. As you can see, they are insufficient
for induction heating service. ;-)
The load is a single 1/2 x 1" strip of titanium, you can see it glowing up
to about orange heat (1600°F or so).
Oh, and this is also proof of concept for the new induction heater circuit-
I'm using the regulated power supply, oscillator, high and low side drivers
and a UC3842 flyback converter for the high-side supply (which is regulated
by an opto, not very long term stable since it depends on CTR, I should fix
that some day).
Speaking of which:
http://webpages.charter.net/dawill/Images/Induction713.jpg
Rise and fall times are on the order of 0.5us, with the sextet of
STW11NB80's. Gate waveforms are +10V ON, -5V OFF.
Tim
