RU160641U1 - POLARIZED ELECTROMAGNET - Google Patents

Abstract

A polarized electromagnet containing a magnetic circuit made of two parallel cores with coils, an armature mechanically connected to a return spring, at least one permanent magnet located between the cores of the magnetic circuit and having a magnetization axis direction from one core to another, characterized in that its magnetic system is additionally equipped with a ferromagnetic shunt with the ability to move it manually relative to the permanent magnet.

Description

The utility model relates to electrical engineering, in particular to electrical devices, and can be used in the design of polarized relays, contactors, remote switches and other automation devices.

Polarized electromagnets are known in which, in the absence of current in the winding, the force exerted by the flux of a permanent magnet acts on the armature. When current flows in the winding, a working stream arises in the magnetic system, passing sequentially through the working gaps. With the corresponding polarity of the control signal supplied to the winding, the working magnetic flux in the gaps can be added to the polarizing flux or subtracted. At a certain value of the current in the winding, the total magnetic flux provides a force sufficient to attract the armature to the fixed part of the magnetic circuit. Changing the direction of the current leads to the return of the armature to its original position [1]. The main disadvantage of the known polarized electromagnets when used as a drive in sticking contactors is the lack of a manual reset function when the control signal is lost.

Closest to the claimed technical solution is a polarized electromagnet containing a magnetic circuit made of two parallel cores with coils located on the cores, an armature mechanically connected to the return spring, in addition, the electromagnet contains a permanent magnet located between the cores of the magnetic circuit and having an axis direction magnetization from one core to another [2]. The design of this electromagnet is shown in FIG. one.

The disadvantage of this technical solution is the impossibility of manually returning the armature to its original position when the control signal is lost.

The technical result of the utility model is the ability to manually return the armature to its initial position when the control signal is lost.

The technical result is achieved by the fact that in a magnetic system of a polarized electromagnet containing a magnetic circuit made of two parallel cores with coils, an armature mechanically connected with a return spring, at least one permanent magnet located between the cores of the magnetic circuit and having a direction of the magnetization axis from one core to another, a ferromagnetic shunt is installed with the possibility of manual movement relative to a permanent magnet, which can be performed, for example, in the form of a plate or bracket.

A distinctive feature of this technical solution is that in the magnetic system of the device an additional ferromagnetic shunt is installed with the possibility of its manual movement relative to the permanent magnet.

The essence of the utility model is illustrated by drawings.

In FIG. 2, FIG. 3, FIG. 4 presents the claimed polarized electromagnet:

- in FIG. 2 - an electromagnet assembly with an anchor in the initial position, cores, a permanent magnet, control windings and a ferromagnetic shunt located in a position in which its shunting action is excluded;

- in FIG. 3 - an electromagnet assembly with an anchor in the final position, cores, a permanent magnet, control windings and a ferromagnetic shunt located in a position in which its shunting action is excluded;

- in FIG. 4 - an electromagnet assembly with an anchor in an initial position, cores, a permanent magnet, control windings and a ferromagnetic shunt located in a position in which its shunting action takes place;

The polarized electromagnet (Fig. 2, 3, 4) contains a magnetic circuit made of two cores 1 and 2, between which at least one permanent magnet 4 is installed, including 7 and disconnecting 6 windings located on the cores 1, 2, the armature 3, located opposite the poles of the cores, the bearing housing 8, the return spring 9 and the ferromagnetic shunt 5 with the possibility of its movement relative to the permanent magnet 4. The ferromagnetic shunt 5 can be made in the form of a plate or staples made of soft magnetic material.

The inventive polarized electromagnet operates as follows.

In the initial position (Fig. 2), the armature 3 is open. The magnetic flux F _pm permanent magnet 4 is insufficient to create an electromagnetic force to attract the armature 3. When connecting the switching windings 7 for a short time to the control source, a working flux F _p consistent with the flux F _pm and the armature 3 is attracted to the poles of the cores 1, 2, t .e. goes to the final position (Fig. 3).

When de-energizing the windings 7, the armature 3 remains in the final position due to the force provided by the magnetic flux f _pm .

When applying a control signal to the turn-off windings 6, the working stream Ф _{p is} directed counter to the magnetic flux Ф _pm , and the armature 3 returns to its initial position due to the return spring 9.

If the armature 3 was in the final position, but the control signal disappeared unauthorized, then it can be returned to its original position by moving the ferromagnetic shunt 5 to the leftmost position, as shown in FIG. 4. In this case, the magnetic flux F _{pm of the} permanent magnet 4 is almost completely closed through the magnetic shunt 5, bypassing the working gaps (Fig. 4).

The utility model provides the ability to manually return the anchor to its initial position when the control signal is lost.

Information sources:

1. Gordon A.V., Slivinskaya A.G. Polarized Electromagnets. - M.: Energy, 1964.

2. Slivinskaya A.G. Electromagnets and permanent magnets. - M: Energy, 1972.

Claims (1)

A polarized electromagnet containing a magnetic circuit made of two cores with coils arranged in parallel, an armature mechanically connected to the return spring, at least one permanent magnet located between the magnetic cores and having a direction of the magnetization axis from one core to another, characterized in that its magnetic system is additionally equipped with a ferromagnetic shunt with the ability to move it manually relative to the permanent magnet.

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