SU661452A1 - Toroidal core magnetic characteristic measuring device - Google Patents

Description

one

The invention relates to the field of magnetic measurements and can be used in the technological verification of the parameters of magnetic ring cores.

Devices are known for testing the magnetic characteristics of toroidal cores, comprising a base, a contact needle, a needle holder, a contact bath located under the base and a current source with a measuring device 1.

In this device, the core is installed under the needle, and the conductive material in the Liquid state is used as the return contact.

However, in the known devices, as a result of wetting of its influence of a liquid conductive material, the instability of the transient contact increases, which is sharply manifested when microcurrents pass through it.

It should be borne in mind that microcores are used to make storage matrices with two or three coordinate buses. Consequently, for a higher quality tech. Soska testing individual cores, they must also be shielded with two or three wires.

However, contact needles that penetrate the core window and are located in close proximity to each other have a small diameter and their contact area is available for connection to the test apparatus is small, and the pressure exerted on them by the movable contact elements is limited. All this also leads to an increase in the instability of the transient contact, which is aggravated by the fact that the measuring currents can be up to 0.3 A.

In addition, due to the close proximity of each other to the contact elements, their closure probability increases.

5 to each other through conductive dust, which is formed during the switching process.

Of the known devices, the device closest to the invention is a device for testing the magnetic characteristics of toroidal cores, which contains a base, with a pin connector fastened on it, the fixed part of which is made in the form of a rod for mounting the test core and fixed to the base; inside the rod are placed conductors connected with the contacts located on the surface of the rod, the second ends of which are led out for connection to the measuring panel 2.

After the core is installed on the base in such a way that the rod is located in its inner hole, the movable part of the connector is put on the rod, the internal contacts of which in contact with the contacts of the rod provide the ability to be connected to test equipment. However, the known device also does not allow measurements to be performed with sufficient accuracy .

The purpose of the present invention is to improve the measurement accuracy.

This goal is achieved by the fact that in a device for measuring the magnetic characteristics of toroidal cores containing a measuring unit, a base placed on the board, a connector, the fixed part of which is made in the form of a rod fixed on the base, with the conductors insulated from each other located inside the rod the ends connected to the contacts, and the lower ends to the base plate, the movable part of the contact connector is made in the form of a cone base placed in the cylinder guides, In the side surface of which there are metalized and insulated lodgings, which are connected to the base plate through the measuring unit, and the contacts of the rod are made of spring material and are located on the upper end of the rod.

The design of the proposed device shown in the drawing. The device contains a base 1, a rod 2 inside which conductors 3 are located, and spring-loaded contacts 4 are mounted on the front part, a base plate 5 on which conductors 3 are led, a cone 6 with lodgments 7, which are connected to the dress contacts through measuring unit 8 the base, the inspected core 9, the guide cylinder 10, the bracket 11, the connecting conductors 12, the handle 13.

The device works as follows.

The core 9 mounted on the core 2 is mounted on the base plate 5 of the base 1. C

Using the handle 13, the base of the cone 6 is inserted into the locking side grooves (not shown) of the guide cylinder 10 mounted on the brace 11, and then lowered. The contacts 4 are thus divorced 120 ° relative to each other. As the cone is lowered, the area of contact between the spring contacts 4 and the area of the cradle 7 increases, and as the spring contacts bend, their pressure on the cradle increases. All this leads to increased reliability of contact.

The lower parts of the rods and cradle 7 (to B-B) are covered with insulating coating.

Measurements are made by passing the current through the circuit conductors 3, led out to the base plate 5 - connecting conductors 12 - measuring unit 8 - cradle 7.

Since in the measurement mode the conductive parts of the contacts are separated from each other, the reliability of the device will increase.

Claims (2)

1. USSR Author's Certificate No. 306499, cl. G 01 R 33/12, 1972. 2. USSR author's certificate number 165503, cl. G 01 R 33/12, 1964.