SU1561125A1 - Method of controlling sealed contact reed relay - Google Patents

Abstract

The invention relates to electrical engineering and can be used to create phase-sensitive reed relays. The purpose of the invention is to provide phase selectivity of the reed switch. For this, two magnetic fluxes directed oppositely are used. The direction of each flow through the moving contact of the reed switch is perpendicular to the direction of its possible movement outside the working gap of the reed switch. When the phases of the flows coincide, due to their opposite direction, they deviate to the zone of the working gap of the reed switch, causing it to trigger. With a phase shift of 180 °, they do not pass through the working gap, the reed switch does not work. 4 il.

Description

The invention relates to electrical engineering, in particular to electrical equipment engineering, and can be used in various branches of the national economy to create reed alternating current relays with phase selectivity, for example, in the field of railway automation.

The purpose of the invention is to expand the scope.

FIG. 1 schematically shows a device for carrying out the method, front view; in fig. 2 - the same, top view; Fig 3 - the same, left view; Fig 4 is a graph of phase-sensitive characteristics.

Each relay contains a reed switch 1, a drive winding 2, a control winding 3, as well as a magnetic circuit consisting of a core 4 and a pole 5 of a winding winding, a core 6 and a control winding pole 7, a frame 8. Winding 2 and 3 arranged in such a way that the magnetic fluxes they create are directed oppositely. The movable contact part 9 of the reed switch 1 can be made, for example, in the form of a ball floating in mercury for a plunger reed switch (Fig. 1) or in the form of a cantilever plate for a tongue reed switch (Fig. 3).

In the absence of, for example, a control signal, the magnetic flux of the magnetizing winding 2 is closed through core 4, pole 5, the moving contact part 9 of the reed switch 1 and core 6 and pole 7 of the control winding 3. The reed switch does not work. Due to the presence of a magnetic circuit consisting of elements 4-8, an air gap between the rotor 8 and the output of the fixed contact part 10 and the location of the reed switch so that the movable contact part 9 enters the space between poles 5 and 7 and moves out of it during its movement , and the working gap of the reed switch was outside this space (Fig. 1 and 3), the proposed method of controlling the reed switch is realized, i.e. each flow (control winding 3 or biasing winding 2) is directed through its movable contact piece 9 perpendicular to it moving th and does not pass

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WITH

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to

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Through the working gap of the reed switch. With this Flow Direction, the state of the relay depends on the f) T phase shift of the currents of the control and Humagnetizing windings.

If, when the control winding is turned on, the 3 phases of the control currents and the biasing windings coincide, then the magnetic resistance for the flow of the magnetizing winding 2 through the core 6 and the control winds 7 increases sharply due to their opposite connection. The magnetic flux of the magnetizing winding 2 deviates from its original path and closes through the core 4, pole 5, the moving contact piece 9, the working gap of the reed switch between the moving contact piece 9 and the closing terminal of the fixed contact piece 10, and PMO 8, and the magnetic flux of the control winding 3 is shielded through its core 6, pole 7, the sub-contact piece 9, the working gap of the eagle, ROM 8, which causes the displacement of the sliding contact piece 9 and the closure of the Ecker 1 .

If at switching on of control gate 3, the phase shift between the currents of the control– winding and biasing windings is ≤180 °, then the magnetic fluxes created by them are directed according to and are closed through elements 4, 5, 9 7, b and 8, no passage through the working gap. Reed switch does not work.

With a phase shift of currents other than 0 °, for example 15 °, most of the period when the instantaneous directions of the windings 2 and

0

3 opposing, the total flow passes through the working gap of the reed switch, causing it to trigger. When the phases of currents shift, for example, at 160 °, large parts of the period of flow direction agree, therefore the reed switch does not work.

When, for example, the magnetizing winding 2 is disconnected, the magnetic flux of the control winding 3 is closed through its core 6, pole 7, moving contact piece 9, pole 5, core 4, and 4, because the magnetic resistance of this circuit is much less than the circuit, through the core 6, pole 7, the movable 5 contact piece 9, the fixed contact piece 10, the air gap between the output of the contact piece 10 and the yoke 8. The reed switch does not work or turns off if it was turned on.

Using the proposed control method of the reed switch allows for the phase selectivity of the reed switch.

Claims (1)

Invention Formula 5 A reed switch control method consisting in creating two magnetic fluxes directed towards each other, characterized in that, in order to expand the field of application, each of said magnetic fluxes are directed outside the working gap of the reed switch through the moving contact piece perpendicular to its direction possible movement. ten one about- / FIG. one / Gh, WO -135 -90 -45 0 45 30 135 180 FIG. four  3 Icpafy a p