SU1310920A1 - Automatic switch - Google Patents

Abstract

The invention relates to electrical engineering, in particular to automatic switches. The aim of the invention is to reduce the size and reduce the cost of an automatic switch. The switch contains a movable contact (PC) 7, a fixed end of the auger cycle (NC) 8, a control system including a capacitor 1, a coil 5 of an induction dynamic drive, a thyristor 4 connected in series, a measur 6 of an induction dynamic drive connected to a PC 7, the charging unit 2 of the capacitor I, the electronic control circuit 3, the diode 9 and the electromagnet 10. The electromagnet 10 acts on the PC 7, and its winding through a serially connected diode 9 is connected in parallel to the capacitor 1. The polarity of turning on the diode 9 is inverse Thyristor on-line polarity 4. When commanded, the electronic control circuit 3 opens the thyristor 4, through which the capacitor 1 is discharged to the coil 5 of the induction-dynamic drive, causing it to trip, the PC 6 and the NC 8 reboot. the capacitor 1, the current enters through the diode 9 into the winding of the electromagnet 10, the measles of which additionally affects the PC 7, providing the contacts differ by the required distance. 1 il. I (L: about ND

Description

The invention relates to electrical apparatus, in particular to automatic switches.

The purpose of the invention is to reduce size and reduce cost while maintaining high speed.

The drawing shows the circuit breaker circuit.

The circuit breaker contains a capacitor 1, a unit 2 for charging a capacitor 1, an electronic control circuit 3, a thyristor 4, a coil 5 for an induction-dynamic drive, a measur 6 for an induction-dynamic drive, a moving contact 7 and a fixed contact 8, a diode 9 and an electromagnet 10 ,

The movable contact 7 is pressed against the fixed contact by an opposing spring (not shown) “Anchor 6 of the induction-dynamic drive, rigidly connected with the movable contact 7, is pressed against the coil 5 of the induction-dynamic drive. One output of the coil 5 is connected to the cathode of the thyristor 4, and the other to one of the terminals of the winding of the electromagnet 10, one of the terminals of the capacitor 1 is connected to this point, the second output of the capacitor 1 is connected to the anode of the thyristor 4, the cathode 9 is connected to the last, the anode which is connected to the second terminal of the winding of the electromagnet 10, the control transition of the thyristor 4 is connected to the electronic circuit 3 of the control. Capacitor 1 is connected to the output of charge unit 2.

The device works as follows.

In the initial state, the capacitor 1 is charged from the charge unit 2 with the polarity indicated in the drawing. When entering into the electronic circuit 3 control commands to disable it

contact 7. However, the energy of the induction-dynamic drive is not enough to diverge the contacts by the required distance. After crossover, the polarity of the voltage on the capacitor 1 is inverse to that indicated on the drawing. Consequently, a negative voltage is applied to the cathode of diode 9 — it opens and the capacitor 1 is recharged a second time, but already through the winding of the electromagnet 10. The armature of the electromagnet starts moving, acting on the moving contact 7 and providing a contact divergence for the required distance. After the secondary recharge, the voltage on the capacitor 1 has a field p10

55

20

25

thirty

35

40

shown in the drawing, thyristic 4 is closed due to the absence of control pulses — the circuit has returned to the initial one; condition.

Thus, this device uses a repeated discharge of a capacitor that supplies power to the induction-dynamic drive coil on the electromagnet winding, which ensures contact times for a predetermined distance at smaller capacitance values and, therefore, reduces the dimensions and reduce the cost of the device.

Claims (1)

Invention Formula Circuit Breaker Contents a fixed contact, a sliding contact connected to the core of an induction-dynamic drive, the coil of which is connected in series with a capacitor and a thyristor, an electronic control circuit of the thyristor. and a capacitor charge unit, the fact that, with the target, it produces a single short term of 45 size reduction and a pulse that opened the thyristor 4, and the capacitor 1 is recharged through the coil 5 of the induction-dynamic drive. The recharge current, flowed through the coil 5 of the induction-dynamic drive, causes the movement of the core 6 of the induction-dynamic drive connected to the motion controller. Order 1898/50 Circulation 699 Subscription Production Polygraph, production line, Uzhgorod, Design site, four 109202 contact 7. However, the energy of the induction-dynamic drive is not enough to diverge the contacts by the required distance. After crossover, the polarity of the voltage on the capacitor 1 is inverse to that indicated on the drawing. Consequently, a negative voltage is applied to the cathode of diode 9 — it opens and the capacitor 1 is recharged a second time, but already through the winding of the electromagnet 10. The armature of the electromagnet starts moving, acting on the moving contact 7 and providing a contact divergence for the required distance. After the secondary recharge, the voltage on the capacitor 1 has a field p10 55 0 five 0 five 0 the thyristor 4 is closed due to the absence of control pulses — the circuit has returned to the initial one; condition. Thus, this device uses a repeated discharge of a capacitor, which supplies power to the induction-dynamic drive coil, on the electromagnet winding, which ensures the contact time to a predetermined distance at smaller capacitance values of the capacitor, and therefore allows to reduce the size and reduce the cost of the device. Invention Formula Circuit breaker A fixed motion contact, a sliding contact connected to the core of an induction-dynamic drive, the coil of which is connected in series with a capacitor and a thyristor, an electronic control circuit of the thyristor. and a capacitor charge unit, is the fact that, from the cost, it is equipped with a diode and an electromagnet, the coil of the electromagnet and the diode are connected in series and connected to a parapelled capacitor, 50. Moreover, the polarity of turning on the diode is reverse to the polarity of turning on the thyristor, and the electromagnet bore is connected izhnym contact.