SU1492395A1 - Pulsed multipositional switch - Google Patents

Abstract

The invention relates to automation and switching technology and can be used in automatic control systems, control, measurement and communication as a multi-channel switch, a pulse sequential switch, a stepper switch sequential action, a step switch. The aim of the invention is to improve the reliability of the device. To prepare the device for operation, it is necessary to apply a current pulse from the source of the setting pulse to the connection point 8 of the control windings 2 and 3 of the first discharge. The windings 2 and 3, by their joint action, develop a magnetic flux, under the action of which the core 1 is magnetized to saturation. At the end of the impulse action, the reed switches of the first discharge under the influence of the residual magnetic flux of the core 1 work. The reed switch 5 switches the load, and the reed switch 4 prepares the reed switch on circuit of the second discharge. When the first control pulse arrives at pin 7, the second-order reed switches operate and release the first-time reed switches. Upon receipt of the following pulses, the device operates in the same way. 1 hp ff, 1 ill.

Description

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The invention relates to actuation and switching technology and can be used in automatic control, monitoring, measurement and communication systems as a multi-channel switch, a pulse switch of a sequential action of a step switch.

The purpose of the invention is to increase the reliability of operation.

Fig. 1 shows a schematic diagram of a pulsed multi-position switch; in fig. 2 - the cyclogram of its functioning in time.

A pulsed multi-position switch consists of single-type cells - bits. Each bit represents a core 1 made of ferromagnetic material of average magnetic rigidity, playing the role of a magnetic memory element, on which two control windings 2 and 3 are installed symmetrically about its transverse axis of symmetry and are connected in series with the same name to a common point (FIG. , 1 - ends) At the core 1, the reed switches 4 and 5 are also installed, one of which is switching 4 and provides switching of its own switch circuits, and the other of closures 5 provides switching of external load are narrow, If necessary, there may be several such reed switches, including switching ones. The opening contact of the switching reed switch 4 of all bits is connected to the common negative bus of the source of control pulses. The switching contact of the switching reed switch 4 of all bits is connected to the beginning of one of the control windings 3 of its own discharge, and, besides the switching contact of the reed switch 4 of the last discharge, via diode 6 to the common connection point of the control windings of the next discharge. The closing contact of the switching reed switch 4 of all bits is connected to the positive bus 7 of the source of control pulses, to the negative bus of which the beginning of the second control winding 2 of all bits is connected, To the common connection point of the control windings 2 and 3 of the first bit, terminal 8 is connected connection to the source of the installation pulse, 11d1 is free of charge (during the cyclic mode of operation, the switching contact of the switching reed switch 4 is the last bit through the switch. 9 and the semiconductor diode 6 can be connected to common point of control is the first discharge windings.

The switch is controlled by short current pulses with a duration less than or equal to the reed off time.

The device works as follows.

Suppose that in the initial state of the hearts of the NICs of all bits are demagnetized, the windings are de-energized, and the state of contacts of the reed switches of all bits corresponds to FIG. 1.

To prepare the device for operation, it is necessary to supply a pulse of current i ista D from a source of the adjusting pulse to a common connection point 8 - control windings of the first discharge (Fig. 1). In this case, the current iUCT

5 / spreads in two parallel

0

five

0

five

0

five

chains: the first chain from the end of the winding 3 to its beginning and then through the disconnecting contacts of the reed switch 4 to the negative bus, the second chain from the end of the winding 2 to its beginning and further to the negative bus. Diode 6 prevents the shading of the note-3 through the switch 9 (in case it is closed) and the reed switch 4 of the last discharge. The indicated direction of the currents in the windings leads to the fact that the windings, by their joint action, develop a magnetic flux, under the action of which the core 1 is magnetized to saturation. Upon termination of the impulse, the reed switches of the first discharge under the action of the residual magnetic flux of the core 1 work: the reed switch 4 connects the beginning of the winding 3 of the first discharge and the common point of the control windings of the second discharge through diode 6 to the bus 7 of the source of control pulses, and the shorting The reed switch 5 switches the load 1c, (fig, 1, fig, 2).

The first control pulse iunp from the source of control pulses spreads along two parallel chains through the closed switching and closing contacts of the reed switch 4 of the first bit: the first circuit goes from the beginning to the end of the winding 3 and then goes from the end to the beginning of the winding 2 of the first bit to a negative one tire. Wherein

51

The diode 6 prevents the winding 2 from shunting through the switch 9 (if it is closed) and removing the contacts of the switching reed switch 4 of the last bit. The second circuit is through a second discharge diode 6 to a common point of the control windings of the second discharge, from which the current spreads from the end to the beginning of the winding 2 of the second discharge and to the negative bus, and from the end to the beginning of the winding 3 of the second discharge through break contacts reed switch 4 second bit to negative tire. Due to the indicated current direction, the control windings of the first discharge develop magnetic fluxes directed opposite to each other. Each of these flows is closed at the corresponding contact of the reed switches and returns from the zone of overlapping of the contacts of the reed switches to the corresponding part of the core 1. At that, due to the fact that the flows in the contacts of the reed switch have an opposite direction, in the contact overlap zone they are mutually calculated, as a result of which the total flow in this zone is zero, the electromagnetic attractive force disappears and after the termination of the control pulse the reed switches they are released: the reed switch 5 breaks the load (Fig. 2), and the reed switch 4 blocks the flow of control signals along the described circuits. At the same time, due to the indicated direction of the currents in the control windings of the second discharge, the core of this discharge Yes, it is magnetized to fill in one direction, and at the end of the control impulse together with releasing the first-time reed switches, the second-level reed switches work: the reed switch 5 turns on the load, and the reed switch 4, similarly to the first discharge reed switch and the third tripping circuit.

The second control pulse through the short-circuiting switching and closing contacts of the reed switch 4 of the second bit enters the control windings of the second and third bits. A second discharge diode 6 prevents the winding 2 of this discharge from shunting through the reed contacts 4 of the first discharge. In this case, the symmetric parts of the second-stage core are magnetized opposite, and the core

2 3 fJ) 6

Trot'e about r chrnl.ch Iamat Pichiv.t tg n one way up to Nazio. leads to ottguskan g (pkokon second discharge and triggered i-epKoiuiR third discharge, the load i tsg. is switched on, and i, is included. On the same way, when receiving the next control pulses release the reed switches of the previous discharge and reed switches work the next (n-2) th pulse leads to the release of the penultimate reed switch and to the triggering of the last reed switch.

15 bit When switch 9 is turned on (p-1) -th pulse, it only leads to the release of the last discharge reed switches, and the switch operation cycle ends there. To ensure

At the next cycle of operation, it is necessary to apply a pulse from the source of the setting pulses, after which the operation of the device will repeat in the order described (Fig. 2).

5 In order to ensure continuous cyclic operation, it is necessary to close switch 9. In this case, the (n-1) th pulse from the source of control pulses will release the last bit of reed switches and trigger the first bit of reed switches, after which the device is ready for the next control pulses, and the algorithm of its functioning is repeated.

Thus, in the proposed device, the magnetic flux passing through the contact overlap zone of open reed switches, not participating

0 in the commutation of the load and its own circuits, regardless of the amplitude of the control pulses, is always zero. This observance of the device increases the reliability of the device and removes the requirements for precise calibration of the amplitude of control pulses.

Claims (2)

Invention Formula 01 A pulse multi-position switch is a multi-bit shift register, each bit of which is implanted in the form of a ferrite containing an element 5 magnetic memory, two control windings, connected to R common point with their similar terminals and located symmetrically on the magnetic memory element five five the transverse axis of symmetry, the closing and switching reed switches, the middle of the intercontact gaps of which coincide with the transverse axis of symmetry of the magnetic memory element, characterized in that, in order to increase the reliability of operation, diodes are inserted into each bit, the second one of the controls The coils are connected to the common negative terminal of the source of control pulses, and the second terminal of the second winding is connected to the switching contact of the switching reed switch of its discharge, switching th reed contact switching all bits except posledkatod which is connected to the common point of the windings actuating next discharge, the break contact of the switching reed designed to be connected to a common negative 5 0 bus, and the closing contact is connected to the positive bus of the source of control pulses, and the common point of the control windings of the first discharge is connected to the output intended to be connected to the source of the setting pulse. 2. A switch according to claim 1, characterized in that, in order to extend the functionality by providing a cyclic mode of operation, an additional diode and a switch are connected in series between the switching contact of the last-bit switching reed switch and the common point of the control windings of the first bit, moreover, the additional diode is turned on so that its direct conductivity corresponds to the direction of the current from the switching contact of the switching reed switch to the common point of the control windings. 1