SU1325600A1 - Induction relay - Google Patents

Abstract

The invention relates to electrical engineering and can be used to protect induction motors and 5-. M control them. The aim of the invention is to expand the field of use. gaping by eliminating the dependence of work on the spatial position and ambient temperature. In the stator I there is a groove 2,) which, with the cover 3, forms a closed shell. Contacts 7, 8, and 9 are located inside the shell. Contact 7 is hollow and repeats the shape of the shell. Pins 8 and 9 are separated from each other by an insulating ne {) town. Under the action of a rotating magnetic field, the conductor 6 in the form of a powder condenses, changing the active resistance between the contacts 7, 8 and 9.2 sludge. S (L ig.1

Description

11325600

FIELD: electrical. technician, namely, the induction mode and what it is

to protect and control asynchronous motors.

The purpose of the invention is to expand the field of use by eliminating the dependence of work on the spatial position and ambient temperature.

Figure 1 shows an induction relay with an electrical circuit for applying an induction motor as protection against a wrong 10.

imodenstvir. magnetic fields of the stump and indus; ukted, it creates mechanical forces that compact the conductor between contacts 7 and 9j, which in turn leads to a decrease in several times the active resistance of the conductor 6 in this circuit.

The current through the coil pe 5 on the chain: conductor 10 - contact 7 - conductor 6 between pins 7 and 9 - conductor 12 is sufficient to hold the relay coil in the on position. With incorrect phase sequence in a three-phase network

phase rotation; 2 is a sectional view of a rotating magnetic board.

A-A in FIG.

The induction relay contains a ferrite stator 1, in which the magpol is changed to the opposite granular carbon, moving clockwise through the action of a magnetic field. As a result

The nitric field of which the shell-20 is placed is compacted between the contacts 7 ka, consisting of an annular groove 2,

8 and the uncoupling between contacts 7 and 9. The electrical resistance of granulated coal 6 in the area between contacts 7 and 9 rises sharply and the current through the coil of relay 1 5 decreases and is not sufficient to hold the relay in the on position.

the cover 3 of an insulating non-magnetic material made in the stator. In the ferrite CTaiTope 1 there are holes 4 in which winding 5 is placed. The shell consisting of an annular groove 2 and cover 3 is completely filled with a powdered conductor, for example granulated carbon 6, and has common contact 7, as well as contacts 8 I-9, to which the conductors 10–12, respectively, are sealed. The contacts 8 and 9 are made in the form of plates and the contact 7 has a rectangular section and repeats the shape of the shell 2. The winding 5 is connected to a three-phase network, an asynchronous motor 13 is connected in series with it. Through the button 14 and the contacts 8 and 9 are connected relay coil 15, which has contacts 16 to turn on ac of the synchronous motor 13.

The relay works as follows. When a voltage is applied to the three-phase network and the button 14 is turned on, the relay 15 is activated and closes the contacts 16, and a current flowing to the electric motor flows through the winding 5. This current creates a rotating magnetic field whose direction depends on the alternation of phases in a three-phase network. If it is correct, then after

. 1 button release 4 electric motor

.1 3 is turned on and continues to work, since under the action of a rotating magnetic field in a conductor, granulated angle 6, currents are induced, and

imodenstvir. The magnetic fields of the gasket and the industified one create mechanical forces that compact the conductor between contacts 7 and 9j, which in turn reduces the active resistance of conductor 6 in this circuit several times.

The current through the coil of the relay 5 along the chain: conductor 10 - contact 7 - conductor 6 between contacts 7 and 9 - conductor 12 is sufficient to hold the relay coil in the on position. With incorrect phase rotation in a three-phase network on

the field is reversed and the granular carbon is moved counter-clockwise by the magnetic field. As a result

it seals between pins 7

8 and uncoupling between pins 7 and 9. The electrical resistance of granular coal 6 in the area between pins 7 and 9 increases dramatically and the current through the coil of relay 1 5 decreases and is not enough to hold the relay in the on position.

The proposed device has a simple design. Granular carbon steadily changes its transient resistance over a very wide range of temperatures. Relay also

It works steadily when the direction of gravity and vibrations is changed.

Claims (1)

Invention Formula An induction relay containing a stator with windings creating a rotating magnetic field, a closed shell of an annular form made of a non-magnetic dielectric material, inside which there are fixed contacts and a conductive substance, characterized in that in order to expand the field of use by eliminating the dependence work from a spatial position and temperature environment, two stationary contacts are located adjacent and separated from each other by an insulating partition, the third stationary contact is hollow and is located in the shell of the two stationary contacts diametrically mentioned, with current-conducting material, completely filled yuschrsh shell. A-A 6 2V . FIG. 2