SU1352602A2 - Converter starting device - Google Patents

Abstract

The invention relates to the field of electrical engineering and can be used as a starting block for power sources in automation systems and converter equipment. The goal is to increase CRC and reliability by limiting the heat generation in the start-up node. The device contains a voltage supply unit, which includes power 4 and control 5 transistors, which are included through the closing contacts 23 of the remote switch I1 in the power supply circuit of the converter 3. The introduction of the opening contacts 21, the relay 18 and the closing contacts 22 The relay 14 allows a smooth supply of the supply voltage to the converter 3 to be organized with the subsequent guaranteed disconnection of the start-up node during the steady-state operation of the device, as a result of which the losses in the start-up node are sharply reduced. 1 il. W (L / 7d JS 15 20, -i / 419, 1 N

Description

The device relates to electrical engineering and can be used as a starting block of power sources for automation systems and converter equipment.

The aim of the invention is to increase the headspace and to increase the arbor by limiting the generation of heat in the start-up unit.

The drawing shows a diagram of the device start-up Converter.

The device contains input 1 and output 2 terminals for connecting a power source and a converter 3 of a voltage supply node that includes: a power transistor 4, a control transistor 5 connected by a composite transistor, a capacitor 6, which is part of circuit, the resistor 7, which is connected to the base of the control transistor 5, the collector of which is through the current-limiting resistor 8,

is. Then the contact 23 of the remote switch 11 closes. After the contact 22 g closes, the voltage at the base of transistor 5 gradually increases due to the action of the integrating chain 6.7. Due to this, the transistor 4 smoothly opens, and a current begins to flow in the collector. After charging the capacitors of the converter 3, a alternating voltage appears on the output winding of the transformer, which is rectified by rectifier 10 and filtered by filter 9.

In steady state mode, the contact 21 of the relay 18 is in the closed state of the Contact 13 of the relay 14 and the contact time of the 22 of the relay 18 is in the open state.

After a shutdown command has been received, the contact 23 of the remote switch 11 is set to

the filter 9 and the rectifier 10 are connected to the 25 closed state and the device for starting the converter transformer winding returns to the rotator 3. Remote switch 11, the winding 12 of which is connected via the closing contact 13 of the relay 14 to the first input terminal, 30 a the switching off winding 15 is shunted by a diode 16, T1 connected; to disconnect terminal 17; The windings of relays 14 and 18 are bounded by a diode 19 and connected to the on terminal 20; 35 The opening contact 21 of relay 18 is connected in parallel to the power transistor 45 and the closing pin 22 relay 14 is wired between resistor 7

40

and a second input terminal, while the closing contact 23 of the switch 11 is included in the power supply circuit of the voltage supply node "

The device operates as follows: 45

In the initial state, transducer 3 is de-energized, since the contact .23 of the remote switch

11 is open, 1-1 is opening the contact 21 of the relay 18 bypasses the transistor 4o. The circuit 50 of the base of the transistor 5 is disconnected by closing the contact 22 of the relay 14. Winding

12 turning on the remote switch 11 is disconnected through the closing contact 13 of the relay 14.55

When a switch-on command is received, relays 14 and 18 are triggered, while contact 21 is opened, and contact 22 of relay 18 and contact 13 of relay 14 close the initial position.

Claims (1)

Claim The device for starting the converter according to ant, ev, no. 681520 is different from the fact that, in order to increase efficiency and reliability by limiting the heat generation in the starting node, I A remote switch is inserted, the turn-on winding of which through the first closing contacts of the inserted first relay is attached to the leads for connecting the power source, and the shut-down winding is connected between the entered shut-off lead and one of the leads to connect the power source that through the connected parallel windings of the first and second the relay is connected to the input terminal, the power transistor is bridged by opening the 1st contacts of the second relay, the second make contacts are first th relay included in the compounds of the resistor circuit RC- circuit with a second terminal for connecting a power source and a series connection of composite transistor to a first terminal for Con. The power supply is connected through the make contacts of the remote switch. is. Then the contact 23 of the remote switch 11 closes. After the contact 22 closes, the voltage at the base of the transistor 5 gradually increases due to the action of the integrating chain 6.7. Due to this, the transistor 4 smoothly opens, and a current begins to flow in the collector. After charging the capacitors of the converter 3, a variable voltage appears on the output winding of the transformer, which is rectified by the rectifier 10 and filtered by the filter 9. the closed state and device starting the converter returns to initial position. Claim The device for starting the converter according to ant, ev, no. 681520 is different from the fact that, in order to increase efficiency and reliability by limiting the heat generation in the starting node, I A remote switch is introduced, the turn-on winding of which through the first closing contacts of the entered first relay is attached to the leads for connecting the power source, and the shut-down winding is connected between the entered shut-off lead and one of the leads to connect the power source that through the connected parallel windings of the first and second relays connected to the input terminal, the power transistor is bridged by opening 1 contact of the second relay, the second closing contacts of the first th relay included in the compounds of the resistor circuit RC- circuit with a second terminal for connecting a power source and a series connection of composite transistor to a first terminal for power supply Con Cheney accomplished via make contacts remote switch.