Powerful high voltage generator (Kirlian apparatus), 220/40000 volts. Scheme, description

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Powerful high voltage generator (Kirlian apparatus), 220/40000 volts. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Miscellaneous electrical devices

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The generator generates voltages up to 40000 V and even higher, which can be applied to the electrodes described in previous projects.

It may be necessary to use a thicker glass or plastic plate in the electrode to avoid serious electrical shock. Although the circuit is quite powerful, its output current is low, which reduces the risk of a fatal blow if it comes into contact with any parts of the device.

However, you should be extremely careful when handling it, as the possibility of electric shock is still possible.

Attention! High voltages are dangerous. Be extremely careful when working with this circuit. It is desirable to have experience with such devices.

You can use the generator in experiments with Kirlian photography (electrophotography) and other paranormal experiments, such as those related to plasma or ionization.

The circuit uses conventional components, its output power is about 20 watts.

Below are some specifications of the device:

power supply voltage - 117 V or 220/240 V (AC mains);
output voltage - up to 40 kV (depending on the high-voltage transformer);
output power - from 5 to 25 W (depending on the components used);
number of transistors - 1;
operating frequency - from 2 to 15 kHz.

Principle of operation

The scheme shown in fig. 2.63, consists of a single-transistor generator, the operating frequency of which is determined by the capacitors C3 and C4 and the inductance of the primary winding of the high-voltage transformer.

Powerful high voltage generator (Kirlian apparatus), 220/40000 volts
Rice. 2.63 Kirlian apparatus

The project uses a powerful silicon npn transistor. To remove heat, it should be mounted on a sufficiently large radiator.

Resistors R1 and R2 determine the output power by setting the current of the transistor. Its operating point is set by the resistor R3. Depending on the characteristics of the transistor, it is necessary to experimentally select the value of the resistor R3 (it should be in the range of 270 ... 470 Ohms).

As a high-voltage transformer, which also determines the operating frequency, the horizontal scan output transformer of the TV (linear transformer) with a ferrite core is used. The primary winding consists of 20 ... 40 turns of conventional insulated wire. A very high voltage is generated on the secondary winding, which you will use in experiments.

The power supply is very simple, it is a full-wave rectifier with a step-down transformer. It is recommended to use a transformer with secondary windings providing voltage 20...25 V and currents 3...5 A.

Assembly

The list of elements is given in table. 2.13. Since the assembly requirements are not very strict, in Fig. 2.64 shows the mounting method using a mounting block. It houses small parts, such as resistors and capacitors, interconnected by surface mounting.

Table 2.13. Item List

Large parts, such as a transformer, are screwed directly to the housing.

The case is better to make plastic or wood.

As recommended in other high voltage projects, do not use metal enclosures to avoid short circuits and electrical shock.

Powerful high voltage generator (Kirlian apparatus), 220/40000 volts
Rice. 2.64. Mounting the device

The high voltage transformer can be removed from a black and white or color TV that is not working. If possible, use a TV with a diagonal of 21 inches or more: the larger the kinescope, the more voltage the line transformer of the TV should generate.

Resistors R1 and R2 - wire-wound C1 - any capacitor with a nominal value of 1500 ... 4700 uF.

The primary winding is formed by 35 ... 35 turns of a mounting wire with a conductor diameter of 0,5 ... 0,65 mm, wound on a core, as shown in fig. 2.64. Make sure that the direction of winding before and after retraction is the same. The transistor must be placed on a large heatsink. Keep all wires as short as possible to avoid oscillatory processes due to parasitic capacitances and inductances. Connect the cord from the power source to the AC outlet. Close switch S1 leaving S2 open. The circuit will begin to emit a hissing sound, which indicates the generation of high voltage.

Author: N.S.Braga

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gene
"If possible, use a TV with a diagonal of 21 inches or more" - from it you will extract the TDKS, which at the output can only give a CONSTANT high voltage, which, in fact, is practically guaranteed and will kill the experimenter

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