Featured Tesla coils

Micro DRSSTC coils

Mads Barnkob – Kaizer DRSSTC II

Links Construction, demonstration
Power supply 210 VAC through variac
DC bus capacitance 2x 410 uF / 210 VDC electrolytic capacitors in series
IGBTs Half-bridge of IXGN60N60C2D1
Primary coil Flat primary.
Inner diameter 70 mm, Outer diameter 187,36 mm.
6 turns 1,78 mm copper wire (2,5 mm²)
Turn spacing 8 mm. Tapped at 4.8 turns.
Primary capacitor Cornell Dubilier 942C20P15K-F
2 in series
0.075 uF at 4000 VDC
Secondary coil 50 mm diameter, 200 mm long, 1430 windings
0.127 mm enameled copper wire.
Topload 40 x 215 mm aluminium tape on a Styrofoam toroid.
Coupling  
Resonant frequency 327 kHz
Driver Steve Ward UD1.3b, single side PCB
OCD 280 A limiter
Input power 210 VAC in at 2 A. 420 Watt.
On-time 120uS on-time, 35 primary cycles
BPS 350 Hz
Run mode Interrupted
Spark length Up to 0.37 meter long sparks.

Medium DRSSTC coils

Hydron – DRSSTC 1

Links Construction, demonstration
Power supply 230 VAC with voltage doubler
DC bus capacitance 2x 4700 uF / 450V electrolytic capacitors in series
IGBTs Full-bridge of CM300DY-24H, SKM200GB125D, MBM200A6
Primary coil Flat primary.
Inner diameter ? mm, Outer diameter ? mm.
11 turns 1/4″ copper tubing (6 mm)
Turn spacing ? mm. Tapped at ? turns.
Primary capacitor 2uF 1000V Aerovox snubber capacitors
24 in series, 2 parallel strings
0.166 uF at 24000 VDC
Secondary coil 160 mm diameter, 700 mm long, 1900 windings
0.315 mm enameled copper wire.
Topload 160 x 740 mm aluminium ducting toroid.
Coupling  0.15
Resonant frequency 70 kHz (CM300), 80 kHz (SKM200), 65 kHz (MBM200)
Driver Steve Ward UD2.5, with modifications
OCD 750 A (CM300), 650 A (SKM200), 650 A (MBM200) 
Input power 230 VAC in
On-time  ?
BPS  ?
Run mode Interrupted
Spark length Up to 2.4 meter long sparks.

Large DRSSTC coils

Fabricio Franzoli – DRSSTC 3

Links Construction pictures, demonstration
Power supply 10kVA Solid State Variac 0-620VDC from 220VAC mains.
15kVA 3-phase voltage doubler + automatic pre-charge circuit, 620VDC from 220VAC mains.
DC bus capacitance 4x EPCOS 4700uF / 400V electrolytic capacitors
2 in series, 2 strings for 4700uF / 800V
IGBTs Full-bridge of CM300DY-24NF
Primary coil Flat primary.
Inner diameter ~300mm, Outer diameter ~650mm.
10 turns 3/8″ copper tubing (9.52mm), acrilic cover.
Turn spacing 8mm. Tapped at 6.8 turns.
Primary capacitor 36x KEMET MKP-C4AS .68uF / 2000V film capacitors
6 in series, 6 strings for .68 uF / 12kVDC
120ARMS / EqESR = 5mOhm / @100kHz.
Secondary coil 250mm diameter, 1060mm long, 2400 windings
0.41mm (AWG26) enameled copper wire, epoxy coated.
Topload 270 x 1120mm, ring toroid, 13x rings 1/2″ (12.5mm).
Coupling  0.14
Resonant frequency 36 kHz
Driver DD1b
OCD 1200 A
Input power 12 kW
On-time 114 – 200 us (4 – 7 primary cycles)
BPS  55 – 440 Hz
Run mode Interrupted
Spark length Up to 3.60m long sparks.

Phillip Slawinski/Cameron Prince – DRSSTC 6

Links Construction, pictures, demonstration
Power supply Variac 0-280VAC with voltage doubler
DC bus capacitance 8x REVOX RIFA PEH200OO427AM
2700 uF / 420V electrolytic capacitors
2 in series, 4 strings for 5400 uF / 840V
IGBTs Full-bridge of 4x CM600HA-24H
Primary coil Flat primary.
Inner diameter 350 mm, Outer diameter 734 mm.
8 turns 5/8″ copper tubing (16 mm)
Turn spacing 8 mm. Tapped at 4.8 turns.
Primary capacitor 1.25 uF at 8700VAC / 750ARMS / 60 kg
Secondary coil 300 mm diameter, 1500 mm long, 2100 windings
0.65 mm (AWG22) enameled copper wire.
Topload 300 x 1200 mm foam core with aluminium tape toroid.
Coupling  ?
Resonant frequency 36 kHz
Driver Steve Ward UD2
OCD 2000 – 3000 A
Input power 18 kVA
On-time 300 us
BPS 100 – 400 Hz
Run mode Interrupted
Spark length Up to 5 meter long sparks.

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