SU1327330A1 - Start-stop apparatus - Google Patents

Abstract

The invention relates to the field of lighting engineering, in particular, to starting-control devices for gas discharge lamps. The purpose of the invention is to increase the reliability of the apparatus by protecting its windings from unacceptable overheating. The magnetic circuit of the control gear consists of two parts. The working winding 1 is located on one part. The other part is made of a magnetically soft material and bears the start winding 2. The control unit consists of two voltage relays. A high ohm coil 3 of one relay with closing contact 4 is connected to the working winding 1. A high ohm coil 5 of another relay with opening contact 6 is connected to the start winding 2. The actuator is designed as a relay. Coil 7 relay has a breaker 8 and. Closing 9 contacts. Starter 10 is connected in series with winding 2, capacitor 14 and lamp 13. 1 3.p. f-ly, 1 silt, i (L S

Description

The invention relates to lighting technology, in particular to gas control devices for gas discharge; lamps

The purpose of the invention is to increase the reliability of the apparatus by protecting its windings from unacceptable heating.

The drawing shows one of the variants of the control gear and its inclusion in the lamp power supply circuit.

The control gear contains a magnetic system with a working winding 1 and a starting winding 2 located in different parts of the common magnetic circuit. A high impedance coil 3 of the voltage relay with closing contacts 4 is connected to the working winding 1. The high impedance switch 5 of the voltage relay with opening contacts 6 is connected to the start winding 2. These two relays form a control unit made in the form of a relay, the coil 7 of which is powered from the network with opening contacts:} 8 and contacting with safety contacts 9, Starter 10 is connected in series with the starting winding 2 of the control gear and the electrodes 11 and 12 of the lamp 13. Consistently with the lamp, the capacitor 14 is turned on, Let the device A, the control unit B control mech, be dashed Lowland and actuator B.

The device works as follows.

In the starting mode, the current flows sequentially through the working winding 1, capacitor 14, electrode 11 of the lamp 13, starting winding 2 of the control gear, starter IC, electrode 12 of the lamp 13 and contact 8. At the same time, the voltage on the winding 1 feeds the high-resistance coil 3 relays with closing contacts 4, and the voltage on the winding 2 - high-resistance coil 5 with opening contacts 6. Thus, contacts 4 are closed, and contacts 6 are open, coil 7 of the actuator relay that controls contacts 8j is disconnected and the power winding circuit to 1 and 2 remains closed. The starting mode is completed by opening the starter 10 of the winding circuit 2, accompanied by the ignition of the lamp 13.

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In the normal lamp burning mode, the coil 3, in the same way as the starting mode, is energized by the winding 1, and the coil 5 is powered by the emf induced in the winding 2. As a result, the circuit supplying the coil 7 remains open with contacts 4 and 9, and the lamp 13 is not turned off by contacts 8 .

If, as a result of the closure of the contacts of the starter 10 or for any other reasons, the control gear heated up to an unacceptable value, the core of the thermomagnetic-math material on which the starting winding 2 is located loses its ferromagnetic properties, the EMF in the winding drops to a value insufficient for the relay core to keep the coil field 5. As a result, the contacts 6 are closed, while the contacts 4 remain closed (the voltage on the winding 1 remains sufficient to supply the coil). The condition determining the on state of the relay energized by voltage X on the working winding 1, and the disconnected state of the relay energized by voltage Y on the starting winding 2 depends on the ratio of turns of these windings, their active resistances and the installation of each relay determining total coefficient k. Thus, the power supply circuit of the coil 7 of the actuating relay turns out to be closed and the contacts 8 turn off the power supply to the lamp 13. The contact 9 of the relay acting as an actuator keeps the coil 7 in the on state. To prevent false tripping of the lamp, the relay should also have a slightly longer response time than relays powered from windings 1 and 2.

Claims (1)

1. A control gear for a gas discharge lamp containing a magnetic system with a working and start windings and a capacitor, which is designed so as to increase the reliability of the apparatus by protecting its windings from unacceptable heat, the magnetic circuit consists of two parts, on one of which the working winding is located, and the other part bears the starting winding and is made of a soft magnetic 3 1327330 material, and the terminals of the windings are connected in series with the closing contact with the control unit of the executive relay, the coil of which is connected to the working winding by an attached mechanism, and is opened 2. The apparatus according to claim 1, with a relay contact, the coil of which Sch and with the fact that the control unit is connected to the starting winding, consists of two voltage relays, the contact contact of the actuator of one of which is connected to the mechanism is connected in series to the working winding, the coil of the second - with a lamp, and the closing contact of this to the starting winding, and the executive Q relay is connected to the power supply circuit; its mechanism is in the form of a relay, for example, a trunk parallel to the closing contact fed from the mains, the coil is a relay, the coil of which is connected to the operating winding of the actuator.