RU103436U1 - DEVICE FOR IGNITION OF A DISCHARGE LAMP - Google Patents

Abstract

 A device for igniting a gas discharge lamp, supplied directly from the AC mains or through a current limiter, comprising a working capacitor charged via a current-limiting element and connected via a switching element, which is unlocked from the control unit, parallel to the primary winding of a pulse transformer, the secondary winding of which is connected in series with a discharge lamp, characterized in that a magnetic core made of an amorphous metal alloy is installed in a pulse transformer but.

Description

The utility model relates to electrical engineering and can be used to ignite discharge lamps.

It is known that for ignition of gas discharge lamps, pulses with a certain voltage amplitude and duration are necessary. These pulse parameters, among other things, are determined by the characteristics of the pulse transformer, such as the transformation coefficient, the inductance of the primary and secondary windings, and the saturation current.

A device is known for igniting gas discharge lamps fed directly from an AC network or through a current limiter, comprising a working capacitor charged via a current-limiting element and connected via a switching element unlocked from a control unit parallel to the primary winding of a pulse transformer, the secondary winding of which is connected in series with the lamp directly or through current limiter to the network (RU 2254693, IPC Н05В 41/23, publ. 11/18/2002).

A disadvantage of the known device is the lack of a core in the magnetic circuit of a pulse transformer, which leads to the need for winding a large number of turns, and, consequently, to an increase in losses on the winding of a pulse transformer.

The technical effect is to increase the reliability of ignition of a discharge lamp, to ensure energy efficiency of the device by reducing losses on the winding of a pulse transformer.

The technical result is achieved in that the device comprises a working capacitor charged through a current-limiting element, connected via a switching element, which is unlocked from the control unit, parallel to the primary winding of a pulse transformer, through the secondary winding of which a discharge lamp is connected directly to the network or through a current limiter. A magnetic circuit made of an amorphous metal alloy is installed in a pulse transformer.

Figure 1 shows the proposed device for igniting a gas discharge lamp, including a working capacitor 1 connected through a switching element 2 (for example, a transistor), unlocked from the control unit 3, parallel to the primary winding of the pulse transformer 4. A circuit consisting of series-connected secondary windings of a pulse transformer 4 and discharge lamp 5 is connected to the network directly or through a current limiter 6. The shunt capacitor 7 is connected to the network through a current limiter 6. Working condensation Op 1 is connected via a current limiting element 8 parallel to the shunt capacitor 7. L, D, N - contacts, to connect devices (circled in dotted line) to the discharge lamp 5 and the network. In the pulse transformer 4, a magnetic circuit 9 is installed, made of an amorphous metal alloy.

The device operates as follows. A working capacitor 1 is charged through a current-limiting element 8. As soon as the voltage U on the capacitor 1 reaches a certain value (usually within 0.5-1 of the amplitude value of the mains voltage), the control unit 3 generates a pulse that unlocks the switching element 2 (usually for a period of 1- 100 μs). During this time, the working capacitor 1 is discharged through the primary winding of the pulse transformer 4, the secondary winding of which is connected in series with the lamp 5 and the shunt capacitor 7. The emf induced on the secondary winding provides a breakdown of the interelectrode gap of the discharge lamp. After an arc discharge occurs in the lamp, the device turns off.

The proposed device was manufactured, in the pulse transformer of which a magnetic circuit of the KL 21-14-10 brand, made of an amorphous metal alloy, was used, and the electronic circuit matched the characteristics used in the ZRM 1.8 ES / B. With the same characteristics of the high-voltage pulse generated by ZRM 1.8 ES / B and the claimed device, the resistance of the winding in the pulse transformer of the proposed device is 3 times less than in ZRM 1.8 ES / B. In the claimed device, the magnetic circuit of the pulse transformer is made of an amorphous metal alloy based on iron, losses in the winding of the device for igniting gas discharge lamps are reduced by 3 times, the consumption of copper wire is reduced, the overall dimensions of the device are improved, the heating is reduced.

Amorphous metal alloys based on iron and cobalt, iron-nickel alloys can also be used for the magnetic circuit of a pulse transformer.

Claims (1)

A device for igniting a gas discharge lamp, supplied directly from the AC mains or through a current limiter, comprising a working capacitor charged via a current-limiting element and connected via a switching element, which is unlocked from the control unit, parallel to the primary winding of a pulse transformer, the secondary winding of which is connected in series with a discharge lamp, characterized in that a magnetic core made of an amorphous metal alloy is installed in a pulse transformer but.