SU983807A1 - Polarized electromagnetic change-over switch - Google Patents

Description

The invention relates to the TctM elements of electromagnetic relays and can be used in automation systems, telecontrol and telecontrol.

Polarized electromagnetic switches are known with a differential magnetic system containing a permanent magnet, measles, several cores on either side of the axis of rotation of the core, windings Cl3 and 2.

A disadvantage of the known polarized electromagnetic switches (hereinafter referred to as switches) is low sensitivity, due to the fact that in order for the control magnetic flux switch to act the winding of the switch must create a large magnetomotive force sufficient to overcome the large magnetic resistance of the working air gaps between the magnetic core wires and the core. through which the control magnetic flux passes.

In addition, the reliability is low due to the fact that during artificial braking of the core; at the moment of reaching the magnetomotive

the strength of the control winding is sufficient to trigger the switch, and the magnetically moving magnet force of the control winding increases further; the switch measles remains in its initial position.

Known switches are triggered only by the current of one particular polarity, that. limits the scope of their application, since it excludes the possibility of their use in circuits where the operation of the switch is required from any polarity of the control current.

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The aim of the invention is to increase the sensitivity and reliability of operation.

The goal is achieved by the fact that the cores, located on each side from the axis of rotation of the core, are connected by a jumper of magnetic conductive material.

Figure 1 shows a diagram of a magnetic switch system with two

25 cores on each side of the axis of rotation of the core and with two windings; ; FIG. 2 is the same, with four windings.

The switch of FIG. 1 contains 3 permanent magnet 1, measles 2, axis 3

rotation of the core, the housing 4, jumpers 5 and b, the magnetic cores 7-10, windings 11 and 12. The switch in FIG. 2 will additionally hold the windings 13 and 14.

The operation of the switch is as follows.

In the normal position, when there is no current in the windings 11 and 12. One, the magnetic fluxes F1, F2, FZ, F4 flow through the magnetic conductors 7-10, respectively. Magnetic fluxes F1, F2, FZ, F4 flow respectively, while F1 and F2 are much more than FZ and F4 because that the magnetic resistance of the gap between the bark 2 and jumper b is much less than the magnetic resistance between the jumper 5 and the core 2 due to the difference in the magnitude of the air gaps between these jumpers and the core 2, which will cause measles to be pulled to the jumper 6.

When current flows through the winding 11, a magnetomotive force arises, which creates in a closed loop consisting of jumper b, magnetic cores 7, 8 and account: the main body 4 between them, controlling the magnetic flux, which saturates the magnetic cores 7 and 8. The saturation of the magnetic cores 7 and 8 causes an increase in their magnetic resistance, which causes the F7 and F8 fluxes to decrease and the strength of the corr 2 core to the jumper b decreases, and the flux of the FZ and F4 fluxes increase, which increases the attractiveness of the core 2 to the jumper 5, measles 2 reaches the latter and changes its position.

After the current is turned off in the winding 11, the flow Fu disappears and the magnetic cores 7 and 8 exit from the saturation state, however, the corb 2 remains attracted to the jumper 5, since in this position the fluxes of the FZ and F4 are much more than the flows of F1 and F2 due to differences in the air gap between the core 2 and the jumpers 5 and b, the return of the core 2 to the normal position is similar when current is passed through the winding 12,

The increased sensitivity of the proposed switch is due to the fact that there are no air gaps in the flow circuit of the control magnetic flux F-, therefore this circuit has a small magnetic resistance and for saturation -: NIN magnetic cores 7 and 8 (or 9 and 10) winding 11 (or 12). should create a small magnetomotive force, and consequently, expend a small power.

The saturation of the magnetic cores 7 and 8 (or 9 and 10) can be achieved with a polarity of current in winding 11 (or 12), which makes the proposed switch workable for any polarity of control current.

When artificially holding the core 2 at jumper b (or 5) and increasing the current in the winding 11 (or 12) beyond what is necessary to operate in the proposed switch, it is impossible to reach the attraction of the core 2 to jumper b (or 5) due to the fact that 7 and 8 (or 9 and 10) mounted under the action of current in the winding 11 (or 12).

In the described operation of the proposed switch, it is carried out in the case of bot kor 2 on hang up.

The picture shown in FIG. 2, the switch, when the windings 11 and 13 turn on consistently, when the magnetic fluxes generated by these windings in the magnetic cores 7 and 8 are folded, and similar to the inclusion of the windings 12 and 14, works on the rebound of the core similar to that described for FIG.

When the windings 11 and 13 are turned on counter when the magnetic fluxes generated in these 5 windings in the magnetic cores 7 and 8 are in the opposite direction and the windings 12 and 14 turn on similarly, the operation of the proposed switch can take place on both the hang-off and the pull-in core 2 similar to the work of well-known switches.

The operation of the attraction switch is preferred and 5 proceeds as follows.

In the normal position (FIG. 2), in the absence of current in the windings 1114, the operation of the switch proceeds as described for FIG. When 0 passing current through the windings 12 and. 14, under the action of the magnetomotive forces created by these windings, control magnetic fluxes Fy and appear, which are added to the FZ and F4 and subtracted from F1 and F2, which makes measles 2 attracted to the jumper 5 and changes its position. After the current is turned off in the windings 12 and 14, the measles 2 will remain attracted to the strand S as described for FIG.

The return of the core to the normal position occurs analogously .., when current is passed through the windings 11 and 13. When connected to the windings 12

5 and 14, the current of the reverse polarity of the operation of the core 2 will not occur, since the streams will have the opposite direction and will not be summed up, but subtracted with the FL and F4 streams,

n Ie With this switch on, the switch works only from the currents of one specific polarity. When the current changes in the polarity of only one of the windings 12 and 14, it also does not

Claims (2)

5, core 2 will be triggered, since in this case the flows in the magnetic cores 9 and 10 from the windings 12 and 14 will fold and cause the magnetic cores 9 and 10 to saturate as described for fig. 1, When current of any field is passed through only one of the windings 12 or 14 and there is no current in the other of these windings, the core 2 will also occur, since the driving force of any ONE of these windings causes the magnetic cores 9 and 10 to saturate as described for figure 1. Thus, the operation of the core 2 occurs only when there is a current of a certain polarity in both windings 12 and 14, i.e. logical operation is implemented. If, in addition to the two magnetic circuits of the proposed switch connected by a jumper, a third one is installed, the connecting line and not connected by a jumper to other magnetic conductors, the winding on this magnetic conductor allows the logical function OR to operate with other windings of the switch. By installing the required number of magnesium conductors and connecting part of them with jumpers, the given logical AND-OR function can be implemented in the proposed switch. To implement, for example, the logical function XI, X2 X3.X4, 4 magnetic circuits must be installed, two of which are connected by one jumper and the other two by another jumper, and the signals XI, X2 must be fed to one pair of windings with interconnected magnetic circuits, and X. and X4 apply to the other pair of windings with the magnetic circuits connected by a jumper. Implementing a switch based on existing switch designs presents no technical difficulties. At the same time, the increase in sensitivity, reliability / ability to perform it both for operation only from a given polarity of the control signal and for any polarity of this signal, as well as the possibility of reliable implementation of the AND logic function and a given logical FUNCTION, achieved in the proposed switch. AND-OR allows you to satisfy important requirements for switches that cannot be achieved in the known switches. The switch can be widely used in automation, remote control and elekontrol. Claims of the invention A polarized electromagnetic switch with a differential magnetic system containing a permanent magnet, measles and at least two cores with control windings located on them, mounted on either side of the axis of rotation of the core, characterized in that in order to increase sensitivity and reliability his work, cores located on either side of the axis of rotation of the core, (interconnected by a jumper of magnetically light material. Sources of information taken into account when kspertize 1.Royzen VZ Small polarized relay and remote switches. L., Energie 1969. 2. IT wire technology. 1970, issue 4, pp.27-35. b P7