CN205491299U

CN205491299U - LED street lamp constant voltage power supply circuit

Info

Publication number: CN205491299U
Application number: CN201620048854.1U
Authority: CN
Inventors: 易善波
Original assignee: Shenzhen Liwei Electronic Technology Co Ltd
Current assignee: Shenzhen Liwei Electronic Technology Co Ltd
Priority date: 2016-01-19
Filing date: 2016-01-19
Publication date: 2016-08-17
Anticipated expiration: 2026-01-19

Abstract

The utility model discloses a LED street lamp constant voltage power supply circuit, including polyphase transformer W, rectifier bridge T, triode V1 and resistance R5, transformer W's winding N1 restraines the both ends of connecting the 220V line voltage behind the diode DW through parallelly connected transient voltage, and rectifier bridge T's port 1 and rectifier bridge T's port 3 are connected respectively to transformer W's winding N2's both ends, rectifier bridge T's 2 projecting poles of connecting electric capacity C1, electric capacity C2, resistance R5 and triode V1 of port, triode V1's base connecting resistance R5's the other end. The utility model discloses LED street lamp constant voltage power supply circuit simple structure, components and parts are few, export main power source and auxiliary electrical power source respectively through adopting the polyphase transformer to realize regulated output voltage's purpose, and set up light control module and spike voltage suppression component in the circuit, can increase the life of circuit and practice thrift the electric energy, have consequently that the function is various, convenient to use and a strong advantage of practicality.

Description

A kind of LED Street lamp voltage-stabilized power supply circuit

Technical field

This utility model relates to a kind of street lamp circuit, specifically a kind of LED street lamp voltage-stabilized power supply circuit.

Background technology

Along with the negative effect caused by Global Greenhouse Effect constantly manifests, in the world every country all using energy-saving and emission-reduction as the major issue that be must take in native economic development, the emerging power-saving technology that LED lighting engineering is arisen at the historic moment just under this background, LED illuminating product has had been applied in daily life, along with developing rapidly of LED at present.The conventional light source that now white LED light source is compared has life-span length, solid state lighting is hardly damaged, specular removal, without advantages such as hydrargyrum environmental protection, antidetonations, future will become third generation light source, the revolution again of lighting field will be brought, especially extremely wide in field of street lamp lighting application, generally there is function singleness, volume greatly in current LED streetlamp power source, the defect that cost is high.

Utility model content

The purpose of this utility model is to provide the LED street lamp voltage-stabilized power supply circuit of a kind of simple in construction, stable performance, with the problem solving to propose in above-mentioned background technology.

nullFor achieving the above object，This utility model following technical scheme of offer: a kind of LED street lamp voltage-stabilized power supply circuit，Including polyphase transformer W、Rectifier bridge T、Audion V1 and resistance R5，The two ends of 220V line voltage are connected after the winding N1 of described transformator W transient voltage suppressor diode DW in parallel，The two ends of the winding N2 of transformator W connect the port 1 of rectifier bridge T and the port 3 of rectifier bridge T respectively，The port 2 of rectifier bridge T connects electric capacity C1、Electric capacity C2、Resistance R5 and the emitter stage of audion V1，The base stage of audion V1 connects the other end of resistance R5，The other end of electric capacity C1 connects electric capacity C2、Electric capacity C3、Electric capacity C4、The winding N3 of transformator W、The port 4 of rectifier bridge T、The fixing end of of potentiometer RP1 and LED lamp H，The other end of the winding N3 of transformator W connects the negative electrode of diode D2，The colelctor electrode of audion V1 connects the pin 1 of chip IC 1，The anode of diode D2 connects the other end and the resistance R2 of electric capacity C3，The other end of resistance R2 connects the anode of diode D1 and another fixing end of potentiometer RP1，The pin 2 of chip IC 1 connects the sliding end of potentiometer RP1，The pin 3 of chip IC 1 connects the other end of resistance R1、The other end of electric capacity C4 and the other end of LED lamp H，Described chip IC 1 is LM317 type circuit of three-terminal voltage-stabilizing integrated.

As preferred version of the present utility model: described resistance R5 is photoconductive resistance.

Compared with prior art, the beneficial effects of the utility model are: this utility model LED street lamp voltage-stabilized power supply circuit simple in construction, components and parts are few, by using polyphase transformer to export main power source and accessory power supply respectively, thus realize the purpose of regulated output voltage, and circuit is provided with control module and peak voltage straining element, service life and the saves energy of circuit can be increased, therefore there is diverse in function, easy to use and practical advantage.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of LED street lamp voltage-stabilized power supply circuit.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment; technical scheme in this utility model embodiment is clearly and completely described; obviously; described embodiment is only a part of embodiment of this utility model; rather than whole embodiments; based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.

nullRefer to Fig. 1，In this utility model embodiment，A kind of LED street lamp voltage-stabilized power supply circuit，Including polyphase transformer W、Rectifier bridge T、Audion V1 and resistance R5，The two ends of 220V line voltage are connected after the winding N1 of described transformator W transient voltage suppressor diode DW in parallel，The two ends of the winding N2 of transformator W connect the port 1 of rectifier bridge T and the port 3 of rectifier bridge T respectively，The port 2 of rectifier bridge T connects electric capacity C1、Electric capacity C2、Resistance R5 and the emitter stage of audion V1，The base stage of audion V1 connects the other end of resistance R5，The other end of electric capacity C1 connects electric capacity C2、Electric capacity C3、Electric capacity C4、The winding N3 of transformator W、The port 4 of rectifier bridge T、The fixing end of of potentiometer RP1 and LED lamp H，The other end of the winding N3 of transformator W connects the negative electrode of diode D2，The colelctor electrode of audion V1 connects the pin 1 of chip IC 1，The anode of diode D2 connects the other end and the resistance R2 of electric capacity C3，The other end of resistance R2 connects the anode of diode D1 and another fixing end of potentiometer RP1，The pin 2 of chip IC 1 connects the sliding end of potentiometer RP1，The pin 3 of chip IC 1 connects the other end of resistance R1、The other end of electric capacity C4 and the other end of LED lamp H，Described chip IC 1 is LM317 type circuit of three-terminal voltage-stabilizing integrated.

Resistance R5 is photoconductive resistance.

nullOperation principle of the present utility model is: 220W line voltage is after the winding N1 of transformator W，Secondary side winding N2 and N3 respectively obtain the alternating voltage of 35V and 6V，Secondary side N2 end passes through rectifier bridge T rectification、Capacitor C1、The input of chip IC 1 it is input to after C2 filtering，By by chip IC 1、DC voltage is exported in LED lamp H after resistor R1 and electric capacity C4，The alternating voltage of the 6V of the winding N3 coil output of secondary side is by diode D2、Electric capacity C3、A negative voltage is exported as accessory power supply after resistance R2 and Zener diode D1，By electric capacity C1、The charge-discharge characteristic of C2 realizes the compensation to input voltage，Thus regulated output voltage，Resistance R5 and audion V1 in circuit form control module，During daytime，Photoconductive resistance R5 is the lowest by illumination resistance，Audion V1 base stage obtains electric，Therefore audion V1 cut-off，LED lamp H does not works，When night does not has illumination，The resistance of resistance R5 increases，Audion V1 base stage is low level，Audion V1 turns on，Circuit can bio-occlusion LED lamp H be powered，Transient voltage suppressor diode DW in circuit is for eliminating the peak voltage that city's electro-mechanical wave produces，Prevent circuit from being burnt by peak voltage.

Claims

null1. a LED street lamp voltage-stabilized power supply circuit，Including polyphase transformer W、Rectifier bridge T、Audion V1 and resistance R5，It is characterized in that，The two ends of 220V line voltage are connected after the winding N1 of described transformator W transient voltage suppressor diode DW in parallel，The two ends of the winding N2 of transformator W connect the port 1 of rectifier bridge T and the port 3 of rectifier bridge T respectively，The port 2 of rectifier bridge T connects electric capacity C1、Electric capacity C2、Resistance R5 and the emitter stage of audion V1，The base stage of audion V1 connects the other end of resistance R5，The other end of electric capacity C1 connects electric capacity C2、Electric capacity C3、Electric capacity C4、The winding N3 of transformator W、The port 4 of rectifier bridge T、The fixing end of of potentiometer RP1 and LED lamp H，The other end of the winding N3 of transformator W connects the negative electrode of diode D2，The colelctor electrode of audion V1 connects the pin 1 of chip IC 1，The anode of diode D2 connects the other end and the resistance R2 of electric capacity C3，The other end of resistance R2 connects the anode of diode D1 and another fixing end of potentiometer RP1，The pin 2 of chip IC 1 connects the sliding end of potentiometer RP1，The pin 3 of chip IC 1 connects the other end of resistance R1、The other end of electric capacity C4 and the other end of LED lamp H，Described chip IC 1 is LM317 type circuit of three-terminal voltage-stabilizing integrated.
LED street lamp voltage-stabilized power supply circuit the most according to claim 1, it is characterised in that described resistance R5 is photoconductive resistance.