SU1428613A1 - Arrangement for lighting vehicle interior - Google Patents

Abstract

The invention relates to electric transport and can advantageously be used for luminescent illumination of trams and trolleybuses. The purpose of the invention is to increase reliability. The vehicle interior lighting device comprises a thyristor transducer, tO, manual 2, and automatic 3 reversing switches, block 1 of fluorescent lamps. The control input of the thyristor switch is connected to the output of the logical element 11, connected by one of the inputs directly, and the other through the block contacts 8.9 to the output of the voltage supply sensor 12 of the contact network to which the inverted input of the trigger 13 is connected, whose information input connected to the output of the trigger 14, connected by the input to the output of the key element 15, mechanically connected with the button for opening the doors of the vehicle interior. Moreover, the output of the trigger 13 is connected to the input of the control element 16 by an automatic reversing switch 2 3. 1 pc. (L

Description

four;;

1C

00 O5

SLE

-

The invention relates to electric transport and is primarily intended for use in power supply schemes for fluorescent lighting lamps in trams and trolley buses.

The purpose of the invention is to increase reliability.

The drawing shows a functional diagram of a device for interior lighting of a vehicle.

The device contains a block 1 of fluorescent lamps connected to the output of a manual reversing switch 2, the input of which is connected to the output of an automatic reversing switch 3, made on power contact elements 4-7, having an auxiliary contact 8 and 9 and connected with an input to a contact network through a thyristor interrupter 10, to the controlling input of which the output of the logic element I 11 is connected, connected by one of the inputs directly, and the other through the block contacts 8 and 9 to the output of the voltage sensor 12 The inverse clock input of the D-flip-flop 13 is connected to it, the information input of which is connected to the output of the counting flip-flop 14 connected by the output to the key element 15 mechanically connected with a button (not shown) to turn off the doors of the vehicle, and the output D - the trigger is connected to the input of the control element 16 by an automatic reversing switch 3.

The device for interior lighting of the vehicle operates as follows.

To turn on the interior light, the manual reversing switch 2 is set to any position that differs from the neutral one, ensuring that the current flows through it to the block 1 of fluorescent lamps. When a voltage is applied from the sensor 12, the voltage goes through

the logic element 11 on the control, the input of the thyristor interrupter 10, the block contacts 8 and 9 prevent the input of the control input of the thyristor interrupter 10 in the transient operation modes of the automatic reversing switch. If the auxiliary contacts are in steady state.

five

0 0 5

0

H

0

,

automatic reversing switch is triggered. If the block contacts 8 and 9 are in a steady state, the thyristor breaker 10 is activated, and the voltage of the contact network is supplied through the thyristor breaker 10, the contact elements 4-7 and the manual reversing switch 2 to the block 1 of fluorescent lamps.

At each stop of the vehicle, the driver presses the button for opening the cabin doors, while the key element 15, mechanically connected with the specified button, triggers the counting trigger 14. During the movement of the electric vehicle, short-term interruptions in the contact network occur. At such times, the transport interrupter 10 closes as the output signal of sensor 12 abruptly drops to zero and causes the control signal to be removed from the control input of the thyristor interrupter 10, as well as the D-flip-flop 13 and the automatic reversing switch 3 is switched to another state only during the specified random low pauses. The automatic reversal of the current direction with the help of contacts 4-7 occurs not during each dead time on the vehicle route, but only during the first current-free pause after pressing the button for opening the doors of the vehicle interior at a stop. Thus, the counting trigger 14 prepares the D-trigger 13 to change the state of the automatic reversing switch 3, and the reversal occurs later when a current-free pause appears. A total shutdown of the illumination is done by setting the manual reversing switch 2 to the neutron. ral position. Practically, tests on urban tram routes show that automatic reversing occurs at least once every 3–10 min.

Claims (1)

Claims of Invention A vehicle interior lighting device comprising a device connected to a Contact network via Manual reversing switch, fluorescent lamps, characterized in that, in order to increase reliability, it is equipped with an automatic reversing switch, contact voltage sensor, triggers, logic element AND, and a key element mechanically connected to the vehicle interior door opening button connected to the power supply circuit of a fluorescent lamp unit, and a thyristor breaker, the control input of which is connected to the output of the logic element I, connected by one of the inputs and another via the contacts of the automatic reversing switch to the output of the voltage sensor of the catenary network, to which the inverse input of one of the triggers is connected, connected by an information input to the output of another trigger connected to the input of the key element, and the output of one of the triggers connected to the control input of an automatic reversing switch, the power input of which is connected to the contact network, and the output to the input of a manual reversing switch.