SU873449A1 - Switching device - Google Patents

Description

(54) SWITCH

one

The invention is intended for use in the electrical industry in automatic parameter control systems.

A switch is known, consisting of cells, each of which contains a transistor, the emitter of which is directly connected, and the base through the first resistor is connected to the first power supply bus, in the collector circuit of the transistor. The relay and diode, the base of the transistor is connected via the closing contact of the relay and the second resistor to the second power bus, and through the capacitor and the third resistor the base of the transistor is connected to the first power bus, the forward and reverse switches and the reset switch 1.

However, the well-known switch has complex switching.

The purpose of the invention is to reduce the switching time.

The goal is achieved by the fact that a switch consisting of pins, each of which contains a transistor, the emitter of which is directly, and the base through the first resistor is connected to the first power bus,

the collector circuit of the transistor is connected in parallel with the relay and the diode, the base of the transistor is connected via the closing contact of the relay and the second resistor to the second power bus, and through the capacitor and the third resistor the base of the transistor is connected to the first power bus, the forward and reverse switches and the first and second additional diodes are inserted into each of the cells; the relay winding of each of the cells is inserted through the first additional diode and successively connected keys of the forward stroke and reverse and the key The initial position is connected to the second power bus, and the anode of the second, additional diode is connected via a capacitor to the base of the transistor, while the anode of the second additional diode of the first cell is connected via a disconnecting relay contact to the forward switch, the anode of the second additional diode of each of the subsequent cells through the opening contact is connected to the second power bus, the cathodes of the first additional diodes are connected to the closing contacts of the relay of each cell and through the entered lock reset key under connected to the self-locking bus, the reset key and the second power bus; the cathodes of the second additional diodes of the first and last cells are connected to the first terminals of the inserted fourth and fifth resistors, respectively; the second terminals of the fourth and fifth resistors are connected to the corresponding direct keys move and reverse.

The drawing shows an electrical schematic diagram of the proposed switch.

The switchboard contains the pics of the 1 | - In, each of which contains a transistor 2, a resistor 3, a capacitor 4, a resistor 5 and 6, a relay 7 with closing contacts 8 and 9 and disconnecting contacts 10, Ig-11pi 12 diodes 13 and 14, additional diodes 15, installation key 16 to the initial position, the key 17 of the forward stroke, the key 18, of the reverse, each of which contains the opening contact 19 and the closing contact 20, the key 21 for blocking the lock.

The device works as follows.

The switch is reset to the initial state by opening the key 16, in this case all the relays of the 7 cells In-B are de-energized and all the capacitors 4 of the same cells are charged, except for the capacitor 4 of the cells B. When closing the key 16, the capacitor 4 cells 1; starts to charge along the circuit “- power supply, switch 16, resistor 6, closed contact 10 of cell 1, closed contact Ib of relay 7 of cell g, capacitor 4 and resistor 3 of cell 1 | and “+ nutrition. The charge pulse opens the transistor 2 cells b, while the relay 7 of the same cell is triggered. His concacts 10 and 12 open, and 9 and 8 close and relay 7 becomes self-locking. When contact 10 is opened, relay 7 cells 1 | the charge circuit of capacitor 4 of cell U is opened and it is discharged along the circuit of resistors 3 and 5 of the same cell.

Switches in the forward direction are controlled by the keys 17 and 21, and the key 21 is triggered with some delay in time relative to the key 17, as well as to the key 18 of the reverse. When key 17 is triggered, its contact 19 opens and breaks the power supply circuit of the relay of 7 cells L - In.

When the key 21 is activated, the blocking circuit of the relay 7 cells 1 / -In is broken, the relay 7 cells 1 | de-energizes and returns to the initial state, its contact 10 is closed and the charging circuit of the capacitor 4 of the cell Iz is restored. The charge pulse opens the transistor 2 cells U, the relay 7 of the same cell is triggered. Its contacts 10 and IG open and break the chains of the charge of capacitors 4 of the previous b and subsequent b cells. Capacitors 4 cells b and 3 are discharged and prepare cells

1 | AND L K forward or reverse the switch. At the same time, contact 12 of relay 7 of cell b is opened. Forward operation is carried out by briefly activating the keys 17 and 21. When the key 17 is activated, its contact 19 opens and breaks the power supply circuit of the relay 7 cells 1 - In and its contact 20, capacitor 4 cells 1; starts charging across the circuit “- power supply, key 16, contact 20 key 17, diode 14, capacitor 4, resistor 3 cells ,,“ power ”, relay 7 cells I; does not work, because its power circuit is open - contact 19 of key 17 is open, capacitor 4 cells b is not charged, because contact 12 of relay 7 cells b is open.

When the switch 21 of the relay 7 of the cell Iz is de-energized and returns to the initial state, the charging circuits of the capacitor 4 of the cells Ij and li are restored. Keys 17 and 21 are reset. Since the capacitor 4 cells 1i is already charged, and the capacitor 4 cells 1z is discharged, the transistor 2 cells U is opened and the relay 7 of this cell is triggered, i.e. the switch makes the forward circuit, similarly to that described, prepares the previous U and the next B cells switch.

The switch reversal is performed by briefly triggering keys 18 and 21. When key 18 is activated, its contact 19 opens and breaks the power supply circuit of the relay 7 cells 1 | -1 and its contact 20 closes, capacitor 4 cells 1 is charged along the circuit 16, the closed contact 20 of the key 18, the diode 14, the capacitor, 4 and the resistor 3 cells 1z, "+ power. Condenser 4 cells 1 | does not charge because the contact 12 of the Ij cell is open.

When the key 21 of the relay 7 of the cell 2 is triggered, it is de-energized and returns to the initial state, the charging circuits of the capacitor 4 of the cells b and 1h are restored. Keys 18 and 21 are reset. Since the capacitor 4 cells 1z is already charged, and the capacitor 4 cells Ii is discharged, only the transistor 2 cells b is opened and the relay 7 of the same cell is triggered, i.e. the switch will turn the scag back.

Thus, each switch switching is carried out by briefly triggering a pair of keys for forward travel and a lock or reset key and a lock reset key and precharge the capacity of the previous or next cell depending on the direction of the switch stroke.

Claims (1)

Invention Formula 55 A switch consisting of cells, each of which contains a transistor, the emitter of which is directly, and the base through the first resistor is connected to the first length