SU1483443A1 - Power supply unit of magnetic rarefication pump - Google Patents

Abstract

The invention relates to the field of automatic control and can be used in control systems and power supply of vacuum-physical equipment, in particular for controlling and powering magnetic discharge pumps. The aim of the invention is to increase the speed of the device by introducing an automatic mode of operation. The device has two modes of operation, which are determined by the operation characteristics of the magnetic discharge pump. The striking current of the first relay 2 is set to the minimum load current, and the second relay 4 to the maximum value. In the first mode, a large current flows in the load circuit and when the relay 2, 4 trips, the device is disconnected from the network. In the second mode, the load current decreases, and when its value becomes less than the minimum, the relay 2, 4 is released, and the relay 14 is activated and locked. In case of short-term breakdowns in the load, the device remains in the working state, since the current rises briefly and a delay in the operation of relay 4 is created due to the capacitor 7. 2 Il.

Description

The invention relates to automatic control technology, and can be used in control systems and power supply of vacuum-physical equipment, in particular, magnetic discharge pumps.

The purpose of the invention is to increase the speed of the device by introducing an automatic mode of operation.

FIG. 1 shows the electrical circuit of the device; in fig. 2 - timing diagrams for the operation of the device.

The device contains a high-voltage power supply 1, a first with a break contact 3, a second relay 4 with a break contact 5, a first 6 and a second 7 capacitors, a first 8 and a second 9 resistors, a low-voltage power supply 10, a delay element 11, a third relay 12 with a closing contact 13, the fourth relay 14 with one normally open contact 15 and one normally open contact 16.

The positive output of the high-voltage power supply is connected to a magnetic discharge pump, negative

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the output terminal through the windings of relays 2 and 4, which are amplified by resistors 8 and 9 and capacitors 6 and 7, is connected to the common output. The high-voltage power supply input is connected to the input terminals of the device via parallel-connected disconnecting contacts 5 and 16. The coil of the third relay 12 is connected to the output terminals of the low-voltage power supply tO via a delay element 11. The winding of the fourth relay 14 is connected to the output of the low-voltage power source 10 through the closing contacts 13,15. Parallel to the closing contact 15, the opening contact 3 is switched on.

The device works as follows.

When power is applied. A low-voltage power supply 10 is turned on and a power supply is applied to the input of a high-voltage power supply 1 via disconnecting contacts 5 and t6.

The power supply device for the magnetically discharged pump has two modes of operation.

The first mode of operation of the device is characterized by high current and low voltage at the output of high-voltage power supply 1.

The second mode of operation of the device is characterized by low current and high voltage at the output of high-voltage power source 1. The mode of operation of the device is determined by the characteristic of the pump.

When the device operates in the first mode, a large current flows in the load circuit of the high-voltage power supply 1. The adjusting resistor 9 sets the tripping current of the relay 4 to I ,, and the adjusting resistor 8 sets the tripping current of the relay 2 to 1g, and. At the current, relays 2 and 4 are triggered, the contacts of these relays 3 and 5 open. After switching on the low-voltage power supply 10 with a delay formed by the delay element 11, the relay 12 is activated, its cocking 13 closes, preparing the turn-on circuit of the relay 14. Relay 14 does not work, because the circuit is open by contact 3 of relay 2.

When switching to the second mode of operation, the current drops, the voltage at the output of the high-voltage power source 1 increases. Current, with current from 0

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starts up the relay 4, closes its contact 5.

At a current of 1.1 g () it releases the relay 2, its contact 3 closes in the winding circuit of the relay 14. The relay 14 operates and blocks itself, i.e. its contact 15 closes, at the same time contact 16 of this relay opens.

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In the second mode of operation of the device in the pump may cause breakdowns. In case of short breakdowns, the pump remains in working condition, the current rises briefly and relay 2 is activated, capacitor 6 creates a small delay in switching on relay 2. Condenser 7 delays the response of relay 4 from short breakdowns c.

In an emergency situation, when the load current rises to the value, the relay 4 is activated and the contact 5 of this relay is opened. In this case, the device is disconnected from the network, i.e. protection will automatically work.

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The economic effect of the application

the device is achieved by increasing the reliability of its operation, since the introduction of an automatic mode eliminates operator errors resulting from the maintenance of magnetically charged pumps.

Claims (1)

Invention Formula The power supply device of the magnetic discharge pump, containing the first, second and third relays, the high-voltage power source, the positive output terminal of which is connected to the magnetic discharge pump, the negative output terminal — to one of the winding terminals of the first relay, one of the input terminals — is connected to The first input terminal is directly, and the second input terminal is connected with the second input terminal through the disconnecting contact of the second relay, which is designed to increase the operation speed by introducing automatic oy, an inlay relay, the first and second resistors, the first and second capacitors, the delay node and the low-voltage power supply are inserted, the winding of the second relay is connected between the winding of the first relay and the common terminal, the first resistor and the first capacitor are connected in parallel with the winding of the first relay winding of the second relay - the second resistor and the second capacitor, the winding of the third relay is connected to the output pins of the low-voltage power source through the delay element, and the winding of the fourth relay - The closing contacts of the third and fourth relays, the opening contact of which is connected in parallel with the opening contact of the second relay, the opening contact of the first relay are connected in parallel with the closing contact of the fourth relay. 7F 9 To pump Phys. 1 High voltage I FIG. 2