The Tesla HV Supply THV40K12:
The aim with this supply is to abide to the Tesla discovery: A High Rate Of Change.
The supply utilizes modern
HexFet and other fast components.
These components are capable
of high speed, high voltage switching. By combining high
voltage and high frequency,
the highest possible Rate Of Change is achieved.
The THV40K12 supply consists of 2 parts:
1: Base supply TBU12V25KHz
2: HV coil
The Base Supply:
A 12 volt DC is chopped
and elevated to 400 volt at 25KHz square wave.
Max power output is 25 watts.
Weight is 350 grams (0.35
kg).
Size is 125 * 88 * 70 mm.
TBU12V25KHZ AC output
curve.
Rise time < 1µsec. |
The HV coil:
A Tesla style HV coil elevates
400v to 40KV
The coil delivers only minute
currents. The output is therefore of a 'static' type
although it oscillates at
25KHz square wave.
As the voltage rises from
0 to 40 KV in 1µSec, voltage rate of change is 40 billion volts per
second.
A maximum rate of change
of current of 10A/µSec combined with 40KV gives a power rate of change
of 4KW/µSec which is 4 billion Watts per second.
Additional circuits:
The Base Supply alone may
be combined with the CDI circuit and an ignition
coil to obtain a
powerful CDI ignition equipment.
The sparks from such a CDI
ignition system may be used to supply vehicle ignition or other
purposes where a controlled
spark frequency is needed.
With a standard 12V ignition
coil, high energy voltages of 20KV may be generated.
Gunnar Jespersen, Electronics
Design Engineer.
Email: gunnar at carl-fh.com