SU409372A1 - COMMUNICATION DEVICE - Google Patents

Description

The invention relates to the field of automation and telemechanics. Switching devices containing a remote switch, one of the windings of which is connected to the power bus through a key element controlled by a contact, in which a remote switch is switched by impulses formed by chains consisting of successive B1 capacitors and resistors. However, such devices can operate only at a low switching frequency of the control contact, which is associated with a large charge time for the capacitors of the forming / C of the kidneys. The purpose of the increase is to increase the probable switching frequency. To do this, in the proposed device, one of the remote non-switch co-tacts is connected between the cathode of the thyristor, which plays the role of a key element, and the corresponding wider P | H and the e.tege.e depicts a schema of the proposed switching device. It contains a control contact /, a resistor 2, a thyristor 3. Parallel to the winding 4 and 5 of the remote switch 6, capacitors 7 1 8 are connected. The own contacts 9 and 10 of the remote switch 6 are connected between the thyristor cathode 3 and the negative power line of the thyristor 3 and the output of the winding 4 of the remote switch 6. The switching device operates as follows. Regardless of the initial state of the switching device, it odioosically tracks the positions of the control contact. In the initial state, the control contact is open, the contact 10 of the remote switch is closed, and its contact 9 is open. The windings 4 and 5 of the remote switch are de-energized. When closing the control contact (through the winding 4), a current flows, at the same time the capacitor 8 is charged. The remote switch 6 operates, its contact 10 opens and breaks the charge circuit of the capacitor 8, which begins to discharge through the winding 4, ensuring reliable operation of the remote switch 6. Contact 9 of the remote switch for this closes.

When the control contact 1 is closed, the thyristor 3 control electrode passes through the resistor 2 a current from the positive power supply, which switches the thyristor 5 to the conducting state. At the same time, the winding 5 of the remote switch 6 begins to flow in such a way that the capacitor 7 is charged at the same time.

The remote switch 6 is activated, its contact 9 is opened, turning off the thyristor 3 and breaking the charge circuit of the capacitor 7, which begins to discharge through the winding 5, ensuring reliable operation of the remote switch 6. The contact 10 is thus closed.

Thus, the device returns to its original state.

Subject from b ete and and

A switching device containing a remote switch, one of the windings of which is connected; corresponding to the power bus through a key element, made, for example, on a thyristor, the anode of which is connected to the winding terminal of the remote switch, and the control electrode

connected to one of the supply rails via a resistor, and to the other via a control contact, characterized in that, in order to increase the possible switching frequency, one of the own contacts of the remote switch is connected between the thyristor cathode and the corresponding thread thickness Thyristor electrode and other winding of the remote switch.

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