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Registered Member #4762
Joined: Sun May 06 2012, 05:59PM
Location: Russia
Posts: 93
Just wanted to share some nice shots of a QCW DRSSTC test rig we've been updating today. Originally it had a buck with IRGP50B60PD1, and a bridge with same IGBTs, now updated to a double bridge, and a boost converter before the buck (again on 50B60), which rises the voltage to ~410VDC and charges the 2x12000uf CDE electrolytics.
125x250 mm secondary with a ~420 kHz freq gives nice 2+ meter swordlike sparks, maximum recorded shot is ~220 cm.
The current limiter is set to 300A, which gives us ~60 kW of peak power through buck. It's amazing how much these small transistors can withstand However, in the end it banged with several kJ from lytics coming into my poor ears.
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
HI Zrg, thanks for the reply..
actually, im current assembling my QCW bus modulator, could you give me some advice with my schematic below? i only have LM311 (voltage comparator) this is the only Voltage comp available here in my country... I used the first one to make the 'hysterizer' and the other for the detector/convert to logic 1 & 0, since the output of the first LM311 is not 1 & 0 but a signal in a form of a ramp,, i would like to know if this IC(LM311) / overall circuit can work? thanks a lot.. :)
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Junky QCW
However, in the end it banged with several kJ from lytics coming into my poor ears.
