SU977977A2 - Pulse force exciter - Google Patents

Description

(54) PULSED POWER

one

. The invention relates to test equipment, namely to pulsed

energizer

for testing materials and products

on the impact of dynamic loads. five

According to the main author. St. No. 714203 is known for a pulsed powering exciter containing a capacitor, a discharge to a multi-loop discharge circuit, each pair of neighboring conductors of which 10 is separated by a rigid insulating gasket 1,

Making the discharge circuit multi-loop allows increasing the developed force in comparison with the single-loop 5-bit discharge circuit, however, if the conductor is in the form of a wide band (sheet), which is necessary in case of loading the test article distributed over the area of its 20 base load, the possibility of increasing the developed force is not fully utilized. This is due to the fact that during the current flow along the strip (sheet) there are two opposite phenomena: current spreading due to the skin effect and compression of the current-carrying path into a straight thread. As a result of the struggle of these phenomena, some equilibrium Q state is established. Thus, not the full width of the conductor is used for current flow. In addition, the known energizer does not provide the possibility of varying the types of loading of the test object.

The purpose of the invention is to increase the force developed by the power driver and vary the types of loading.

This goal is achieved by the fact that in a pulsed energizer, containing a capacitor, a glitter and a multi-loop discharge circuit, a multi-loop discharge circuit is made of multiple width sections divided by rigid insulating pads and electrically connected in parallel, and each of the sections discharge circuit included a variable resistor.

Claims (1)

The sectioning of the discharge circuit makes it possible to efficiently use the entire width of the conductors of the discharge circuit and thereby increase the developed force. When the sections are connected in parallel and the variable resistors are inserted in their chains, the currents flowing in different sections can be both the same and different, which creates the possibility of varying the types of loading of the test object. FIG. 1 shows a circuit diagram of the proposed energizer; in fig. 2 - discharge circuit, section. The pulsed power driver contains a capacitor 1, an arrester 2 and an amplifier, mounted on the base 3 of a multi-loop discharge circuit, made in width from sections 4-6, separated by rigid insulating strips 7 and 8. Neighboring conductors 9 and 10, 10 and 11, 11 and 12 in each section are separated by rigid insulation pads 13, 14 and 15, respectively. Sections 4.5 and B of the electrical system are connected in parallel and variable resistors 16, 17, and 18 are included in their circuits, respectively. Pulsed Energizer works as follows. When switching on the discharge voltage 2, the condenser 1 begins to discharge through the discharge circuit. Electrodynamic forces pushing them out between conductors 9 and 10, 10 and 11, 11, and 12 arise, which is caused by the counter current flow in each of the pairs of adjacent conductors, and between sections 4-6, attracting electrodynamic forces arise due to the same direction of currents in branches x adjacent layers. As a result, between the base 3 and the test object installed on the discharge circuit, a total force arises, the magnitude of which is proportional to the active length of the conductors of the discharge circuit, the number of pairs of interacting conductors and the number of sections evenly spaced across the width of the test object, and depends on currents, flow contours in each section. If equal currents flow in sections 4-6, and this is possible with equal resistance of the chains of all sections, then the total force is directed vertically upwards. If the values of these resistances vary from section to section, for example, according to the law K & R, (where K, the resistance of the circuit of the nth section; n-number of the section), then the force F developed in each section can be . making it so the force from the section varies linearly. With such a distribution of forces on the test object, an impulse moment about the axis passing through the upper conductor of the first section 4 acts. If the test object is placed between the discharge circuit and the fixed support, it is subjected to uneven compression. By varying the resistance of the circuits of sections 4-6 with variable resistors 16-18, various combinations of loads can be obtained. The invention allows to expand the range of test objects and the functionality of test devices, where the proposed force exciter will be applied. Claims. Pulse Energizer auth.St. No. 714203, characterized in that, in order to increase the developed force and vary the types of loading of the test object, the multi-loop discharge circuit is made of widths made up of several sections separated by rigid insulation pads and electrically connected in parallel A variable resistor is connected to the same circuit. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 714203, cl. G 01 M 7/00, 1977 (prototype).