SU675633A1 - Illumination device - Google Patents

Description

(54) LIGHTING DEVICE

I

The invention relates to devices for powering gas-discharge light sources and can be used in the industry producing and operating lighting fixtures, as well as for general and local lighting of industrial, public and domestic objects where minimal pulsation of the light flux is required.

Lighting devices are known in which two series-connected gas discharge lamps or one gas discharge lamp having two consecutive discharge gaps are powered from a three-wire three-phase network through three differently sized inductive ballast elements I.

These devices are unsuitable for powering the lamps from two phases and the ground wire of a three-phase network.

It is also known a lighting device with gas-discharge lamps, in which two lamps are powered from two phases and a neutral wire of a four-wire three-phase network through two inductive ballast elements, in series with each of which one of the lamps is connected between one of the different phases of the network and the neutral wire. .

However, this device does not allow to obtain a sufficiently low level of pulsation of the luminous flux of the lamps.

The purpose of the invention is to reduce the pu-light of the luminous flux of the lamps.

Claims (4)

This is achieved by the fact that in a device containing two gas discharge lamps connected in series or one gas discharge lamp with two successively arranged discharge gaps and two inductive ballast elements, each of which is connected between one of the different phases of a three-phase network and a zero drive in series with one of two or one of the two discharge gaps of one lamp, said inductive ballast elements are magnetically connected and connected according to, with the ballast element connected to the opera ayuschey F, ze network has bolschoy inductive reactance, while coefficient communication between ni.mi lies in the range from 0.2 to 0.35. Inductive ballast elements have a common magnetic drive. To create an additional magnetic connection, the connection windings are included; In addition, the inductive ballast elements have two separate magnetodrives, and l.1 of the creation of a magnetic coupling, the coupling windings are included. In the pos; 1 case, each or one inductive ball element may contain a main winding and a communication winding connected in series. A variant is possible in which the communication windings can supplement (increase or decrease) the magnetic coupling carried out by the magnetic circuit. The magnetic coupling can be performed or supplemented by one or two coupling windings. Adding a magnetic connection to the winding, the connection is accomplished by placing the latter on the same core of magnetic circuit, on which is placed the winding of an inductive ballast element, the magnetic connection with which you want to increase. FIG. I, 2, and 3 are examples of electrical circuit diagrams of an illumination device, in which two inductive ballast elements connected in series with two gas discharge lamps or one gas discharge lamp that have two successive discharge gaps, have a common magnetic core; in fig. Figure 4 shows an example of a circuit diagram of a lighting device, in which two inductive ballast elements have two separate magnetic cores, and the winding of each ballast element consists of the main winding and the communication winding. The device contains two gas discharge lamps I and 2 or one gas discharge lamp 3 containing electrodes 4 and 5. In the device with two lamps, the electrodes 4 are electrically interconnected; in the device with one lamp, electrode 4 is in both cases connected directly to the neutral wire. The electrodes 5 are each connected to one of the different phases of the three-phase network through inductive ballast elements 6 and 7, magnetically interconnected and included in agreement, with the coupling coefficient between them (depending on COOTHOUJC and between the working voltage at the discharge gap and network voltage) has a value of from 0.2 to 0.35, while the intrinsic inductive resistance of the ballast element connected to the advanced phase of the network is greater than the intrinsic inductive resistance of the second ballast element. In any MaiHUThon CLIPPING VOLTAGE THROUGH the communication windings 8, it is essential that each communication winding must be turned on "according to the main winding 9 of the inductive ballast element, on the magnetic core of which it is located and that between two inductive ballast elements is provided magnetic connection with the previously specified value of the coefficient of communication. The device provides a phase shift between the lamp currents (or two discharge intervals of one lamp) at an optimal angle of approximately 90 °, which ensures minimum pulsations of the total luminous flux of the lamps are approximately half that of the two luminaries switched on in a known manner between two phases and zero wire of a three-phase network. This phase shift between the lamp currents is ensured by the fact that the presence of magnetically coupled inductive ballast elements in the device is equivalent to introducing a reactance with a negative value into the neutral wire. An experimental test of the proposed lighting device was carried out in our organization and fully confirmed its high efficiency. Claims. A lighting device containing two gas discharge lamps connected in series or one gas discharge lamp — with two successively arranged discharge gaps and two inductive ballast elements, each of which is connected between one of the different phases of a three-phase network and a neutral wire in series with one of two lamps or One of two discharge gaps of one lamp, characterized in that, in order to reduce the pulsation of the luminous flux of the lamps, said inductive ballast elements are magnetically connected and included according to, the iric ballast element connected to the advanced phase of the network has a greater inductive resistance, and the coupling coefficient between them lies in the range from 0.2 to 0.35. 2. A lighting device according to claim I, characterized in that the inductive ballast elements have a common magnetic core. 3. A lighting device according to claim 2, characterized in that the connection windings are included to create an additional magnetic coupling. 4. Lighting device according to claim 1, characterized in that inductive ballast