SU1062044A1 - Arrangement for power supply to fluorescent lamps of passenger carriage - Google Patents

Abstract

DEVICE FOR ELEKTROPIGAYAIYA fluorescent lamp PASSENGER Skog wagons, comprising an autonomous inverter, whose input is connected to a source of DC power, and an output - to the primary windings of the transformer, the secondary obmogka which is associated with the electrodes of fluorescent lamp of Whitlock and chayuschees in that in order to increase efficiency, it is equipped with a rectifier, the input of which is connected to the secondary winding of the transformer, and the output to one of the terminals of the power supply and one of the electrodes of the lamps, while the other electrodes of the lamps are connected the other terminal of the power source.

Description

The invention relates to electrical equipment of vehicles, in particular, to electrical lighting devices for luminescent luminescent lamps, and can be applied mainly to illuminate the premises of passenger cars.

A device for powering fluorescent lamps of electric rolling stock cars containing a direct current source and is known. the ballast resistor through which connects to the source lukskentsentnye lamps l. ,

The disadvantage of this device is that to supply the lamps the source must have a voltage greater than the voltage of the lamp, which is used as a contact network, for example for a tram with a voltage of 550 V, In passenger cars of electric and diesel trains, where There is a 110 V power supply; according to this scheme, only low-output lamps, such as an LB20 type, can be supplied, the number of which must be very large to obtain the required illumination.

A device is known for powering a passenger car's fluorescent lamps / containing an autonomous inverter, the input of which is connected to a DC power source, and the output to the primary winding of a transformer whose secondary winding is connected to electrodes v1 of the incident lamps 2,

A disadvantage of the known device is that the inverter has a low efficiency (0.6-0.8) and a steeply dipping load characteristic, which, when using powerful fluorescent lamps, such as LB-40 for a voltage of 220 V, can count the device elements on significantly greater maximum voltage.

The purpose of the invention is to increase the efficiency of the device.

The delivered target is achieved by the fact that the device for powering the luminescent lamps of a passenger car contains an autonomous inverter, the input of which is connected to a DC power source, and the output to the primary windings of a transformer whose secondary winding is connected to the electrodes of luminescent lamps is supplied with a rectifier the input of which is connected to the secondary winding of the transformer, and the output to one of the terminals of the power supply inductor and one of the electrodes of the lamps, while the other electrodes of the lamps are connected to the other terminal power source.

FIG. Figure 1 shows a circuit diagram of a device by the example of one of its specific embodiments with a bridge rectifier; in fig. 2 the same, on the example of another variant of its specific performance with a two-phase rectifier and with the output of a zero point of a transformer; in fig. 3 is the same for powering several fluorescent lamps.

The device (Fig. 1 and 2) consists

from the autonomous inverter 1, the input of which is connected to the power source 2, and the output to the primary winding of the transformer 3. The secondary winding of the transformer 3 is connected to the input of the rectifier 4, the output of which is connected} to one of the terminals of the power source 2 and one of the electrodes of the fluorescent lamp 5, the other electrode of which is connected

On the other hand, the source of power is 2. Power. Lamp electrodes are shunted by a chain of starter contacts 6 and a ballast resistor 7. To increase lamp ignition reliability

in the secondary circuit of the transformer 3 may be included a small choke 8.

The device (FIG. 3) has an inverter 1 common to all the lamps 5 and a common starting node including chains of resistors 9 and diodes 10 connected through the starting contact 11 to one of the source terminals 2.

Device- (Fig. 1) works as follows.

:. Phi switching on the voltage of 110 V to the electrodes of the lamp-5 is applied the sum of the voltages of the source 2 of the direct current (110 V) and the direct voltage from the inverter 1 on the secondary winding of the transformer. Under the action of this voltage, the starter is triggered, and through its contacts b and the negative electrode of the lamp 5 a current begins to flow, the value of which is limited by the resistor 7..

When it breaks its contact b, the overvoltage generated by the choke 8 lights the lamp. 5 and the starter remains off. Lamp current is

.nnid-m

 ,

where i is the voltage and frequency on

inverter output; Oud - voltage drop

lamp;

and - voltage in the direct-current network (110 V);

B is the inductance of choke. In this scheme, the lamp is powered by a pulsating current of the same direction, but the energy losses in the elements are reduced, since the percentage of

Claims (1)

DEVICE FOR ELECTRIC PUSHING OF LUMINESCENT LAMPS PASSENGER— IS A WAGON SOON, containing an autonomous inverter, the input of which is connected to a DC power source, and the output is to the primary windings of a transformer, the secondary winding of which is connected to the fluorescent lamp electrodes, which is due to the fact that, in order to increase Efficiency, it is equipped with a rectifier, the input of which is connected to the secondary winding of the transformer, and the output is connected to one of the terminals of the power source and one of the electrodes of the lamps, while the other electrodes of the lamps are connected to the other terminal of the power source.