CN205546040U

CN205546040U - Automatic pressure regulating LED control circuit

Info

Publication number: CN205546040U
Application number: CN201620062082.7U
Authority: CN
Inventors: 刘文波
Original assignee: Dongguan Fozhao Linton Energy Conservation Technology Co Ltd
Current assignee: Dongguan Fozhao Linton Energy Conservation Technology Co Ltd
Priority date: 2016-01-22
Filing date: 2016-01-22
Publication date: 2016-08-31
Anticipated expiration: 2026-01-22

Abstract

The utility model discloses an automatic pressure regulating LED control circuit, including transformer W, rectifier bridge T, relay J, triode V2 summation potential ware RP1, the both ends of 220V alternating current are connected respectively at transformer W's winding N1's both ends, and rectifier bridge T's port 3 is connected to transformer W's winding N2's one end, and relay J's contact J -1's motionless end 2 and transformer W's winding N3 are connected to transformer W's winding N2's the other end, and relay J's contact J -1's motionless end 1 is connected to transformer W's winding N3's the other end. The utility model discloses automatic pressure regulating LED control circuit simple structure, components and parts are few, have set up voltage stabilizing circuit, constant current circuit and overvoltage crowbar simultaneously, effectively ensure the stability and the life of LED lamp, have consequently that the function is various, convenient to use and a strong advantage of practicality.

Description

A kind of automatic Regulation LED Control circuit

Technical field

This utility model relates to a kind of lighting circuit, specifically a kind of automatic Regulation LED control circuit.

Background technology

LED is acknowledged as the forth generation light source of green, is a kind of solid cold light source, has the plurality of advantages such as efficient, life-span length, safety and environmental protection, volume little, high reliability, fast response time.Reach same illuminating effect at present; the power consumption of LED is about the 1/10 of electric filament lamp; the 1/2 of fluorescent lamp; LED power circuit is most important for LED; major part LED lamp still uses common power supply to power at present, and its stability is poor, is easily caused overvoltage, crosses problems such as flowing, under-voltage; thus burn LED lamp, minority has the LED power of defencive function and there is also function singleness, protected effect shortcoming poor, baroque.

Summary of the invention

The purpose of this utility model is to provide the automatic Regulation LED control circuit of a kind of simple in construction, stable performance, with the problem solving to propose in above-mentioned background technology.

For achieving the above object, the following technical scheme of this utility model offer:

nullA kind of automatic Regulation LED control circuit，Including transformator W、Rectifier bridge T、Relay J、Audion V2 and potentiometer RP1，The two ends of the winding N1 of described transformator W connect the two ends of 220V alternating current respectively，One end of the winding N2 of transformator W connects the port 3 of rectifier bridge T，The other end of the winding N2 of transformator W connects not moved end 2 and the winding N3 of transformator W of the contact J-1 of relay J，The other end of the winding N3 of transformator W connects not moved end 1 of the contact J-1 of relay J，The moved end 3 of the contact J-1 of relay J connects the port 1 of rectifier bridge T，The port 2 of rectifier bridge T connects resistance R1、Resistance R2、The colelctor electrode of audion V2、The colelctor electrode of audion V4 and the negative electrode of diode D2，The anode of diode D2 connects electric capacity C1 and relay J，The other end of electric capacity C1 connects electric capacity C2、The anode of diode D1、The fixing end of of potentiometer RP2、The emitter stage of audion V1、The other end of relay J and LED H，The other end of resistance R1 connects the negative electrode of diode D1，The base stage of the other end connecting triode V2 of resistance R2 and the colelctor electrode of audion V1，The emitter stage of the emitter stage connecting triode V3 of audion V2、The base stage of audion V4 and one of potentiometer RP1 fixing end，The base stage of audion V3 connects the sliding end of potentiometer RP1，The colelctor electrode of audion V3 connects resistance R3 and the base stage of audion V1，The other end of resistance R3 connects the sliding end of potentiometer RP3，Another fixing end of potentiometer RP1 connects resistance R4、Another fixing end of potentiometer RP2、The other end of electric capacity C2 and the other end of LED H，The emitter stage of audion V4 connects the other end of resistance R4.

As preferred version of the present utility model: the full bridge rectifier that described rectifier bridge T is made up of four diodes.

Compared with prior art; the beneficial effects of the utility model are: this utility model automatic Regulation LED control circuit simple in construction, components and parts are few; it is provided with mu balanced circuit, constant-current circuit and overvoltage crowbar simultaneously; effectively guarantee the stable of LED and service life, therefore there is diverse in function, easy to use and practical advantage.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of automatic Regulation LED control circuit.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that 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 automatic Regulation LED control circuit，Including transformator W、Rectifier bridge T、Relay J、Audion V2 and potentiometer RP1，The two ends of the winding N1 of described transformator W connect the two ends of 220V alternating current respectively，One end of the winding N2 of transformator W connects the port 3 of rectifier bridge T，The other end of the winding N2 of transformator W connects not moved end 2 and the winding N3 of transformator W of the contact J-1 of relay J，The other end of the winding N3 of transformator W connects not moved end 1 of the contact J-1 of relay J，The moved end 3 of the contact J-1 of relay J connects the port 1 of rectifier bridge T，The port 2 of rectifier bridge T connects resistance R1、Resistance R2、The colelctor electrode of audion V2、The colelctor electrode of audion V4 and the negative electrode of diode D2，The anode of diode D2 connects electric capacity C1 and relay J，The other end of electric capacity C1 connects electric capacity C2、The anode of diode D1、The fixing end of of potentiometer RP2、The emitter stage of audion V1、The other end of relay J and LED H，The other end of resistance R1 connects the negative electrode of diode D1，The base stage of the other end connecting triode V2 of resistance R2 and the colelctor electrode of audion V1，The emitter stage of the emitter stage connecting triode V3 of audion V2、The base stage of audion V4 and one of potentiometer RP1 fixing end，The base stage of audion V3 connects the sliding end of potentiometer RP1，The colelctor electrode of audion V3 connects resistance R3 and the base stage of audion V1，The other end of resistance R3 connects the sliding end of potentiometer RP3，Another fixing end of potentiometer RP1 connects resistance R4、Another fixing end of potentiometer RP2、The other end of electric capacity C2 and the other end of LED H，The emitter stage of audion V4 connects the other end of resistance R4.

The full bridge rectifier that rectifier bridge T is made up of four diodes.

nullOperation principle of the present utility model is: during use，Switch on power，When voltage is normal，Relay J does not works，Its contacting 1、3，The 220V line voltage winding N1 by transformator W、N2、N3 blood pressure lowering、Power to circuit after rectifier bridge T rectification，Under normal circumstances，Diode D2 is the most breakdown，Relay J is not turned on，Its contact J-1 is failure to actuate，Power supply passes through audion V4 simultaneously、Resistance R4 powers to LED H，The input current of LED H is essentially from the emitter stage of V4，So，When input current increases，In circuit, the voltage between the b-e of audion V4 also and then increases，At this moment，The voltage of the e pole of audion V3 and the b interpolar of V3 also increases，And the e of V3、B voltage across poles can not be more than 0.7V，E as V3、When b voltage across poles increases，The e pole of V3 can shunt away the electric current of the b pole flowing to V4，So，Limit the increase of voltage between the b-e of audion V4，Thus realize the purpose that maximum input current limits.

Potentiometer RP2 is used as regulated output voltage, i.e. the brightness regulation of LED lamp H.When output voltage increases, and e, b voltage across poles of V1 also increases, and this causes V1 to shunt the electric current of the b pole walking to flow to V2, after V2 electric conduction flows down fall, is not difficult to find out that the conducting electric current of V4 also declines, so that output voltage declines.When output voltage reduces, return mutually with above-mentioned steps, thus reach the purpose of burning voltage, increase the stability of LED.When in use electric voltage over press occurring, diode D2 is breakdown, relay J turns on, the J-1 action of its contact, connects 2,3 contacts, line voltage is only by winding N1 and N2 blood pressure lowering, thus reduce output voltage, prevent overvoltage from burning circuit, after overpressure situation disappears, circuit turns again to original state, and electric capacity C1 is for preventing the relay J frequent shake near under-voltage marginal value.

Claims

null1. an automatic Regulation LED control circuit，Including transformator W、Rectifier bridge T、Relay J、Audion V2 and potentiometer RP1，It is characterized in that，The two ends of the winding N1 of described transformator W connect the two ends of 220V alternating current respectively，One end of the winding N2 of transformator W connects the port 3 of rectifier bridge T，The other end of the winding N2 of transformator W connects not moved end 2 and the winding N3 of transformator W of the contact J-1 of relay J，The other end of the winding N3 of transformator W connects not moved end 1 of the contact J-1 of relay J，The moved end 3 of the contact J-1 of relay J connects the port 1 of rectifier bridge T，The port 2 of rectifier bridge T connects resistance R1、Resistance R2、The colelctor electrode of audion V2、The colelctor electrode of audion V4 and the negative electrode of diode D2，The anode of diode D2 connects electric capacity C1 and relay J，The other end of electric capacity C1 connects electric capacity C2、The anode of diode D1、The fixing end of of potentiometer RP2、The emitter stage of audion V1、The other end of relay J and LED H，The other end of resistance R1 connects the negative electrode of diode D1，The base stage of the other end connecting triode V2 of resistance R2 and the colelctor electrode of audion V1，The emitter stage of the emitter stage connecting triode V3 of audion V2、The base stage of audion V4 and one of potentiometer RP1 fixing end，The base stage of audion V3 connects the sliding end of potentiometer RP1，The colelctor electrode of audion V3 connects resistance R3 and the base stage of audion V1，The other end of resistance R3 connects the sliding end of potentiometer RP3，Another fixing end of potentiometer RP1 connects resistance R4、Another fixing end of potentiometer RP2、The other end of electric capacity C2 and the other end of LED H，The emitter stage of audion V4 connects the other end of resistance R4.
Automatic Regulation LED control circuit the most according to claim 1, it is characterised in that the full bridge rectifier that described rectifier bridge T is made up of four diodes.