SU894838A1 - High-voltage pulse generator - Google Patents

Description

(54) HIGH VOLTAGE PULSE GENERATOR

I

The invention relates to electrical engineering and can be used in high-voltage devices of various naziacheni, in particular, installations of electron-ion technology, electrophysical equipment.

A high voltage pulse generator is known, which contains a voltage source, a cascade generator, made according to the Arkad'ev – Marx scheme, containing storage capacitors, charging resistors and uncontrolled -. switchable elements connecting the opposite sides of the capacitors of adjacent cascades l}.

Also known is a high voltage pulse generator containing a voltage source, a cascade generator, made according to the Arkadyev-Marx scheme, containing storage capacitors, charged resistors and controlled switching elements connecting the opposite sides of capacitors of adjacent cascade 2.

The closest technical solution to the present invention is a high-voltage pulse generator containing a voltage source and a cascade generator, made according to the Arkadyev-Marx scheme, and consisting of storage capacitors, switching elements connecting the opposite plates of capacitors of adjacent cascades, two groups of thrusters, connecting, respectively, the positive and negative plates of the storage capacitors 3,

A common disadvantage of the known devices is the low reliability of their work when using devices with limited overload capacity for voltage as switching elements, for example, semiconductor controlled gates,

30 due to the uneven distribution of the voltage on them in the process of forming the high voltage pulse, which is always due to

the spread of their dynamic parameters: in addition, during the switching interval of the switching elements (transition time from closed to open), the instantaneous value of the voltage on the element (without taking into account the relatively small value of the throttle current in this interval) is determined as follows

and. R,

I

  H

Where the instantaneous value of the resistance of the k-ro switching element (during the switching interval, Yats varies from с to о);

i is the instantaneous value of the current flowing through the load. In general, due to the inevitable spread of the dynamic properties of the switching elements

, "RK ..." R,

Rh ro

one

H m commuting elements

where is the tone. Due to

of this

and ... and „,

and u u2. f

those. In the known device, in the switching process, a non-uniform distribution of voltage across the switching elements is observed, which leads to neperpy3Kie on the voltage of those elements that have relatively large values (elements with worse dynamic properties).

The purpose of the invention is to increase the reliability of the high-voltage pulse generator.

The goal is achieved by the fact that in a high-voltage pulse generator, which contains a voltage source and a cascade generator, v, is made according to the Arkadyev-Marx scheme, and consists of storage capacitors, switching elements connecting the opposite plates of capacitors of adjacent cascades, two groups of chokes, connecting capacitor capacitor plates of the same name as well as capacitor plates of the first stage of the generator and voltage source of the same name, chokes of one of the cascade generator groups formed on a common magnetic circuit and included under.

The drawing shows a circuit diagram of the device.

The device contains a source of voltage 1, to the output of which a cascade generator is connected, consisting of a series of storage capacitors 2, the generator also contains two groups of chokes 3 connecting the same plates of capacitors 2 and the same plates of the capacitor of the first stage of the generator and the source of voltage I . The throttles of the group connecting the positive covers of the storage capacitors are wired on a common magnetic core 4 and are connected according to, the opposite plates of the capacitors are connected by switching elements 5 controlled by a control device (not shown), to the output of which the load 6 is connected. The device works as follows.

The storage capacitors 2 are charged from the source I through the chokes 3. When the voltage on the capacitors reaches the required value, the control device generates triggering pulses simultaneously applied to all the switching elements 5, which, when opened, connect the opposite plates of the capacitors 2. A total of 6 is applied to the load 6 voltage cascades. The voltage on each of the switching elements consists of the voltage on capacitor 2 and choke 3. Since the chokes of the group connecting the positive plates are made on a common magnetic core 4 are turned on according to, and the voltage of the storage capacitors during switching In the process of their switching, the magnitude of the voltages on the elements 5 will be equal regardless of the spread of their dynamic parameters, as well as the parameters of the control pulses. Due to the fact that all the chokes 3, which have the same number of turns, are filled on the common magnetic core and permeated by the same magnetic flux, the voltage at their terminals during the switching interval will be equal, i.e.

.- ... Ui ... U (,

At the same time, the voltage values of storage capacitors 2 over a relatively short time interval

Claims (1)

Claim The generator of high-voltage pulses, comprising a voltage source and cascade generator configured ^g scheme Arkadieva-Marx and consisting of the storage capacitor, the switching elements connecting dissimilar electrode capacitors adjacent stages, the two groups of restrictors connecting the same name plates of storage capacitors, and the same name plate of the first capacitor cascade of the generator and the voltage source, characterized in that, in order to increase the reliability of operation, inductors of one of the above groups of the cascade generator are made on a common magnetic circuit and are included according to.