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LED (Light Emitting Diode) street lamp drive power source capable of two stages of automatic dimming

A technology of LED street lamps and automatic dimming, which is applied in the direction of light source, electric light source, electric lamp circuit arrangement, etc., and can solve the problems of high voltage, energy waste, and increased damage rate of street lamps, etc.

Inactive Publication Date: 2014-02-26
SHANGSI COUNTY DONGDONG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general cities and towns, there are few vehicles and pedestrians on the road from midnight at night. From midnight to 6 o'clock in the morning, the street lights are always on, which is obviously a waste of energy, and the line voltage in the second half of the night Very high, most street lamps work under the condition of exceeding the rated voltage, which increases the damage rate of street lamps

Method used

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  • LED (Light Emitting Diode) street lamp drive power source capable of two stages of automatic dimming

Examples

Experimental program
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Embodiment Construction

[0006] As shown in the attached figure, after the 220V AC is rectified by a single-phase bridge rectifier, the output 100Hz pulsating DC is sent to the thyristor control circuit. The thyristor circuit is composed of a one-way thyristor SCR, and the operation of the one-way thyristor SCR is controlled by the trigger pulse output by the relaxation oscillation circuit, and the length of time the trigger pulse is sent changes the conduction time of the thyristor SCR in each cycle. To achieve the purpose of dimming.

[0007] As shown in the attached figure, LC1 forms a compound filter circuit, which converts the pulsating direct current into a relatively smooth direct current to supply the working power of the LED light-emitting board.

[0008] As shown in the figure, T1, R2, R3, R4, R5, C2 and normally open contact IC2 form a relaxation oscillation circuit, and T1 is a unijunction transistor. The working process of the relaxation oscillation circuit: when the value of C2 is const...

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Abstract

The invention discloses an LED (Light Emitting Diode) street lamp drive power source capable of two stages of automatic dimming. The LED street lamp drive power source is serially connected behind an LED drive power source, dimming control is carried out by using a timer and a pulse-width modulation manner, thus the LED street lamp drive power source is applicable to various kinds of LED lamps. The LED street lamp drive power source which is general in automatic dimming is simple in circuit structure, perfect in functions, and stable in performance, and is capable of ensuring that electric energy being above 40 percent is saved on the basis of energy saving of an LED lamp after dimming.

Description

technical field [0001] The invention relates to a two-stage automatic dimming LED street lamp driving power supply. technical background [0002] LED street lamps have been widely used on traffic roads in cities and towns, but the driving power supply of the currently used LED street lamps does not have an automatic dimming function, causing the LED street lamps to work blazingly from lighting to turning off the lights. In general cities and towns, there are few vehicles and pedestrians on the road from midnight at night. During the period from midnight to 6 o'clock in the morning, it is obviously a waste of energy to keep the street lights on. Very high, most street lamps work under the state of exceeding the rated voltage, which increases the damage rate of street lamps. Contents of the invention [0003] The invention provides a two-stage automatic dimming LED street lamp drive power supply, which provides a two-stage automatic dimming function. The first level is tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/72
Inventor 黄焕珠
Owner SHANGSI COUNTY DONGDONG ELECTRONICS TECH