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Airfield lighting with LED

A technology for airport lighting and rectifying current, which is applied in lighting devices, semiconductor lamps, electroluminescent light sources, etc. It can solve the problems of complex and expensive solutions, no load characteristics, unstable loads, etc., and achieve cost-effectiveness. , reduce unstable operation, and the effect of simple solutions

Active Publication Date: 2010-09-22
ADB赛福格有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing solutions for powering airport LED lighting units are often complex and expensive
Another problem is that LEDs don't have the same load characteristics as lamps, creating a more unstable load for airport current steps or constant current regulators

Method used

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  • Airfield lighting with LED
  • Airfield lighting with LED
  • Airfield lighting with LED

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] refer to figure 1 , the airport lighting monitoring system comprises a plurality of power supply loops 2 for LEDs 4, one of which is shown in its entirety in the figure. Each LED 4 is connected to the associated loop 2 of the LEDs via the secondary winding 5 of the isolation transformer 6, the primary winding 8 and via the light monitoring switch (LMS) 10, the primary winding 8 of which is connected in series in the supply loop . Each supply loop 2 is powered by a constant current regulator (CCR) 12 via a communicating series circuit modem (SCM) 14 . Concentrator units (CUs) 16 are serially connected or network communication configured into groups 18 of communication units 14 .

[0030] The above-described CU unit 16 and its associated components together form a sub-unit 20 which can be used, for example, as a specific part of an airport lighting system. The lighting system may comprise as many similar subunits as desired, some of which are shown at 20' and 20".

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PUM

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Abstract

A method of feeding electric power to an LED (4) in an airfield lighting unit (7) is provided. The method comprises the steps of: feeding a constant alternating current (ls) to a rectifier (40), rectifying the alternating current (U) to a rectified current (lr), pulse width modulating the rectified current (lr), charging a capacitor (43) with the pulse width modulated rectified current (lr), and feeding the LED (4) with power from the capacitor (43), wherein the step for pulse width modulating the rectified current (Ir) comprises: determining a duty ratio of the rectified current (Ir) after the pulse width modulation according to a voltage at the two ends of the capacitor.

Description

technical field [0001] The present invention relates to a method, unit and system for powering LED airport lighting. Background technique [0002] At airports, lighting systems are used to guide aircraft during landing and taxiing. These lighting systems have a large number of light sources and it is important that these light sources function correctly, with faulty light sources being replaced quickly, especially during times of low visibility. Otherwise, the consequences of the aircraft failing to find the taxiway or stop signal are disastrous. Since inspection of visible light sources increases the risk of accidents and incurs costs, automatic lamp monitoring systems were developed. [0003] The light sources in these lighting systems are usually connected in a so-called series circuit using isolating transformers for each light source. The light sources are connected in series via a power cable and powered by a constant current power source from a constant current reg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/03H05B33/08H05B44/00
CPCH05B33/0818H05B37/038H05B33/0851H05B37/036H05B45/10H05B47/23H05B47/235H05B45/382
Inventor O·霍坎松J·福森
Owner ADB赛福格有限公司