SU1548822A1 - Low-inductance capacitor bank with damage protection - Google Patents

Abstract

The invention relates to high-power, low-inductance capacitor batteries and can be used in experimental physical installations to produce a high-current gas discharge, in particular for magnetic plasma compression and a number of other studies where strong magnetic fields are required. The purpose of the invention is to increase the efficiency of protection of a capacitor battery in the event of breakdown or an accidental short circuit in one of the modules. To do this, in a low-inductance capacitor bank containing N parallel-connected modules 1, each of which includes a storage capacitor 2 and a switch 3, as well as a switch control unit 8, a power supply unit 6 and a load 4, series-connected inductance protective coils 5 are inserted between the previous ones and subsequent modules. Additional inductance coils 7 are introduced according to the number of protective coils so that they form transformers with the latter and are connected to a switch control unit. During the breakdown of one of the capacitors 2 or k.s. in one of the modules 1, in the process of charging, all other capacitors 2 will begin to discharge to the emergency module 1, thereby exciting the emf in the inductor 7. The EMF is detected by the switch control unit 8. From it, a trigger pulse is applied to the switches 3 at the moment when the current passing through the emergency module has not yet reached the critical one. 1 il.

Description

I I I

W J J

I

D

The invention relates to high-power, low-inductance capacitor batteries and can be used in experimental physical installations to produce a high-current gas discharge, in particular for magnetic plasma compression and a number of other studies where strong magnetic fields are required.

The purpose of the invention is to increase the efficiency of protection of a capacitor battery in case of a capacitor breakdown or a random short circuit. in one of the modules.

The drawing shows a low-inductive capacitor battery.

The battery contains n modules 1 connected in parallel, each of which consists of a capacitor 2 and a switch 3 and is connected to the load 4. The protective inductance coils 5 are connected between the modules 1, forming a series circuit connected to the power supply 6. Additional coils 7 are inductively connected to protective coils 5 and are also included in a series circuit, which forms transformers with protective coils 5 and is connected to control switch unit 8 of switches 3.

Battery works as follows

In the normal operation of the battery, the switches 3 are open and the capacitors 2 are charged through the inductance coils 5 to the nominal voltage. When an ignition pulse is applied to the switches 3, all capacitors 2 are discharged to the load 4.

During the breakdown of one of the capacitors or short circuit. in one of the modules 1, during the charging process, all other capacitors 2 begin to discharge to the emergency module 1, thereby exciting the emf in the coils / inductance, which is detected by the control unit 8 of the switches 3.

A trigger pulse is applied to the switches 3 at the moment when the current passing through the emergency module has not yet reached the critical one.

0

0

,

0

five

0

five

Thus, the introduction of protective inductors and the way they are turned on makes it possible to increase the current rise time at the emergency module, which allows switching the battery to the load until the current of the emergency module reaches a critical value.

The introduction of additional coils and their connection to the protective coils and the control unit allows the battery to be connected to the load. This increases the protection efficiency of a capacitor battery in case of a capacitor breakdown or a random short-circuit. in one of the modules.

Claims (1)

Invention Formula A low-inductance capacitor bank with damage protection, containing n parallel-connected modules, each of which consists of capacitors and switches connected in series, the first terminals of the modules are connected to the first output of the power supply unit and have a terminal for connecting the grounding, the second terminals of the modules have a common terminal for connecting the load, the control electrode of each switch is connected to the corresponding output of the control unit, in order to improve the protection of the battery in case of a capacitor breakdown or short circuit in one of the modules, n series-connected protective inductors are inserted into it, connected between the common points of connection of the capacitor and the switch of the previous and subsequent modules and connected to the second output of the power supply unit, additional series-connected inductors by the number of protective coils, forming the transformer connection with the latter, a chain of additional coils connected to the corresponding inputs of the control unit.