SU1721652A1 - Device for control of electric mechanism - Google Patents

Abstract

The invention relates to electrical engineering and can be used in devices containing permanent magnets. The aim of the invention is to increase the reliability of the device. The device contains a permanent magnet with L-shaped pole tips interconnected by non-magnetic plates with ears, mounted on a holder. A permanent magnet is mounted in a longitudinal slot formed by ferromagnetic plates, and pole pieces are located on ferromagnetic plates. A permanent magnet with pole pieces is mounted for movement relative to ferromagnetic plates. 2 hp f-ly, 1 ill.

Description

WITH

with

The invention relates to electrical engineering, in particular, to devices for actuating the contacts of a Gersikon using a permanent magnet.

A switching device containing a permanent magnet drive element is known.

A device for fastening a permanent magnet is known with the help of a pole piece (shoe) made of magnetically soft steel and attached to a moving mechanism by means of non-magnetic bolts.

A disadvantage of the known device is the use of a mechanical connection in a magnetic system, which reduces reliability.

The purpose of the invention is to increase the reliability of the control mechanism of the electrical mechanism, which makes it possible to improve the performance properties.

The electric mechanism control device, made in the form of a permanent magnet with a pole tip located on the holder, is provided with a second pole tip, two non-magnetic plates, each specified non-magnetic plate is made with two ears, the ferromagnetic plates are rectangular in shape and mounted on a moving mechanism so that that a longitudinal groove is formed between them, the said permanent magnet is mounted in the longitudinal groove so. that its axis of magnetization is perpendicular to the longitudinal groove, both pole tips are L-shaped and mounted on ferromagnetic plates, the upper end of the permanent magnet has two bevels, non-magnetic plates with ears are installed in the upper ends of the pole tips so that they are located on the bevels of the permanent of this

Vi n

 SL Yu

magnet, with the permanent magnet with pole pieces mounted with the possibility of movement relative to the ferromagnetic plates. The length of each ferromagnetic plate is greater than the width of the corresponding pole tip. Ferromagnetic plates and pole pieces are made with the same thickness.

The drawing shows the device, axonometric.

The control device of the electric mechanism is used in the switching device as a drive element with a permanent magnet and contains a holder 1 with a permanent magnet 2 fixed to it with two pole pieces 3 and two ferromagnetic plates 4, as well as two non-magnetic plates 5 with ears;

The length of the ferromagnetic plates 4 is determined from the condition

 + 2A

where L is the length of the ferromagnetic plate, mm;

I is the pole width of the magnet, mm;

A - the error of the slide in the device, mm.

The ferromagnetic plates 4 and the pole pieces 3 have a thickness determined by using 2 magnetically hard ferrites as the magnet from the ratio

one

but

2Vg

d

where a is the thickness of the ferromagnetic plate and tip, mm;

d is the size of the magnet in the direction of magnetization, mm

gr Vst / Vgmagn where Vst - induction in steel, T;

Vgnachn - residual induction of the magnet, T.

The control unit of the electrical mechanism, namely the switching device, operates as follows. When the holder 1 with the magnet 2 is in the lower position (as shown in the drawing), the Gersikon is closed / When the magnet 2 is moved upwards, the Gersikon is opened. In the lower position of the holder 1 magnetic

system 2,3 and 5 may abut the hersicon and due to the error of the stroke of the drive device (pneumatic cylinder) in the switching device the movement of the holder 1

may continue further down by the amount of travel error. In this case, with an emphasis of the magnetic system 2,3 and 5 in the Gersikon and with continued movement of the holder down, the magnetic system 2,3 and 5 remains

in place, and the holder 1, together with the plates 4, is displaced downward under it, remaining connected by magnetic attraction forces, by means of the plates 4 with pole pieces 3,

Claims (3)

1. An electrical mechanism control device, made in the form of a permanent magnet with a pole piece located on a holder, which is designed so as to increase reliability, it is equipped with a second pole piece, two ferromagnetic plates and two non-magnetic plates, each specified non-magnetic the plate is made with two ears, the ferromagnetic plates are made rectangular in shape and are mounted on a movable mechanism so that a longitudinal groove is formed between them, said permanent magnet is mounted in a longitudinal groove. that its axis of magnetization is perpendicular to the longitudinal groove, both pole tips are L-shaped and mounted on ferromagnetic plates, the upper end of the permanent magnet has two bevels, non-magnetic plates with ears are installed in the upper ends of the pole tips so that they are located on bevels permanently magnet, with the permanent magnet with pole pieces mounted for movement relative to the ferromagnetic plates. 2. The device according to claim 1, characterized by the fact that the length of each ferromagnetic plates greater than the width of the corresponding pole tip. 3. The device according to paragraphs. 1 and 2, about tl and h a yu b it by the fact that ferromagnetic plates and pole pieces are made with the same thickness.