CN105744681A

CN105744681A - Method and connection line driver for saving electric energy of light emitting diode (LED) streetlamp by 50% again

Info

Publication number: CN105744681A
Application number: CN201610158115.2A
Authority: CN
Inventors: 黄焕珠
Original assignee: Shangsi County Dongdong Electronic Science & Technology Co Ltd
Current assignee: Shangsi County Dongdong Electronic Science & Technology Co Ltd
Priority date: 2016-03-18
Filing date: 2016-03-18
Publication date: 2016-07-06

Abstract

The invention relates to a method and connection line driver for saving electric energy of a light emitting diode (LED) streetlamp by 50% again. The technology is characterized in that a new driver circuit of the streetlamp is designed, and the change of the driving of a light emitting board circuit is supported. According to the method, the circuit of the streetlamp comprises a main circuit and a control circuit, wherein the main circuit is a functional circuit for the LED streetlamp to work and comprises a composite filter circuit and an LED circuit, the composite filter circuit comprises a resistance-capacitance buck circuit, a bridge rectification circuit, an L1, a C3 and a C5, the LED circuit comprises a D1, a D2 to a D84, the control circuit is a monitoring circuit used for the LED streetlamp to orderly work and comprises a clamping or voltage stabilization circuit and a timer circuit, the clamping or voltage stabilization circuit comprises the resistance-capacitance buck circuit, a half-wave rectification circuit, an L2, a C6 composite filter circuit and a voltage stabilization tube d3, and the timer circuit is used for controlling dimming work.

Description

A kind of method that LED street lamp is economized again 50% electric energy and wiring driver

Technical field

The present invention relates to a kind of method that LED street lamp is economized again 50% electric energy and wiring driver.

Background technology

LED street lamp popular in the market, its drive circuit is all with pulsewidth modulation or resistance-capacitance depressurization mode, the circuit of street lamp connects to be connect and has the connected mode that two kinds of circuit in parallel combine, the wiring of series connection is 14 strings etc.: circuitry number in parallel is by the power decision of lamp, increase along with the power of street lamp, circuitry number in parallel also increases, the work total current making street lamp increases, the operating temperature of lamp and then raises, part electric energy is made to wear away with the form of heat energy, reduce the power conversion efficiency of street lamp, severely impact the raising of the fractional energy savings of LED street lamp.As long as being again that street lamp lamp one is devoted oneself to work, just vehement bright working from the beginning to the end always, until lamp is turned off the light, so, in the second half of the night, pedestrian and vehicle on road are all rare, and street lamp still vehement bright work, it is clear that it is the waste on an electric energy.

Summary of the invention

A kind of method that LED street lamp is economized again 50% electric energy of the present invention and wiring driver, the LED street lamp selecting 84W power is example explanation, the LED street lamp of 84W popular on market, its wiring be 14 strings 6 also, when it is with rated current 350mA supply often string LED operation, the forward voltage drop of every LED is 3.2V, and when driving with the Switching Power Supply of pulsewidth modulation or resistance-capacitance depressurization, the power of street lamp consume is 84W.If the wiring keeping 14 strings is motionless, the mode that 14 concatenate line being changed, the wiring going here and there LED 14 is attached by wiring end to end, end to end, and 84 LED strip only draw a end of a thread and a line tail；The driver of street lamp is changed by the Switching Power Supply such as pulsewidth modulation or resistance-capacitance depressurization, changes the constant current Linear Driving constituted with three terminal regulator into, during wiring, the positive pole of the DC source of linear convergent rate is connect the end of a thread of 84 LED strip, be intended to claim the positive pole of LED；And the line tail that 84 LED strip are drawn is received the 1st foot (connecing the 3rd foot in this way during LM317) of three terminal regulator, the 3rd foot of three terminal regulator connects two resistance, a link, and another controls to carry out wiring by the normally opened contact of relay.

A kind of method that LED street lamp is economized 50% electric energy again and wiring driver, its circuit forms the timer circuit of the constant current, light adjusting circuit and the control light modulation work that are made up of single phase bridge type rectifier circu, LC compound filter circuit, audion and forms.

Accompanying drawing explanation

Accompanying drawing is the circuit theory diagrams of a kind of method that LED street lamp is economized 50% electric energy again and wiring driver.

Detailed description of the invention

As shown in drawings, B1 is single-phase bridge rectifier circuit, and its function is that the unidirectional current that alternating current 220V becomes pulsation exports to filter circuit；L, C2 are compound filter circuit, and its input is the unidirectional current of pulsation, and output is the smoother unidirectional current of about 300V.The operating current of LED street lamp is limited to about 350mA.

As shown in drawings, IC1, IC2 are three terminal regulators, IC1 selects LM7812 model, IC2 selects 7824 models, two integrated chips and peripheral circuit composition three-terminal voltage-stabilizing series connection blood pressure lowering (+35V-+12V Power convert) circuit, by the method for two pieces of three-terminal voltage-stabilizing series connection, solve the three monostable briquettings of end three terminal regulator consume electric energy when voltage is too high big, it is easy to the problems such as the poor reliability of heating and circuit.After such three ends are connected in series process, if input voltage is 35V then two pieces of IC_1-3Pressure drop between foot becomes 11 respectively, 12V, and namely pressure drop and heating are shared by two pieces of IC, drastically increase the reliability of circuit.The input of IC1 is IC2 and exports (24V) 24V after 7812, exports+12V galvanic current source.3 foot two parallel resistances of concatenation of IC1, a resistance R1 is fixedly attached to the negative pole of power supply；Another resistance R2 is controlled its work by the normally opened electric shock J of relay.Three-terminal voltage-stabilizing pipe IC1 and peripheral circuit are connected into linear constant current circuit, and its cut-off current is determined by the resistance of resistance R1, R2, when the total resistance value of R1, R2 is selected, are namely supplied the operating current of LED with the electric current of constant about 350mA by three terminal regulator.When normally opened contact J closes, R1, R2 that 2 feet of IC1 are connected are connected into parallel circuit, the all-in resistance of its circuit reduces, circuit works with the rated current constant current 350mA of LED: when normally opened contact J disconnects, and the R2 that 2 feet of IC1 are connected disconnects, only remaining R1 work, circuit hinders electric current flowing with the resistance of big twice, the operating current of LED street lamp reduces automatically, and the power reducing street lamp realizes with an automatic light meter, thus improving the energy-saving efficiency of LED street lamp.

As shown in drawings, IC4 and peripheral circuit form timing control circuit, and executor is controlled by the normally opened contact J of relay J.Resistance R4, electric capacity C7 that 12 feet of IC4 are external form electrifying self-resetting circuit, the moment of power supply is obtained at IC4, R4, C7 circuit is to 12 foot one positive pulse of input of IC3, the internal circuit making IC4 automatically resets, timer counter starts, the low level signal of the 3 foot output lockings of IC4, drive the audion T conducting of positive-negative-positive, relay J adhesive, its normally opened contact J closes, and connects R2 loop, makes R1, R2 be connected into parallel circuit, the all-in resistance of circuit is little value, and circuit provides operating current with specified 350mA to street lamp；When one timing set of street lamp work count down to, 3 ends of IC4 are become the high level voltage signal of output locking from low level, the audion T making positive-negative-positive is become cut-off from conducting, audion T cut-off causes relay J decompression tripping, its normally opened contact follows tripping, cutting off R2 loop, street lamp is with secretly bright operating mode work.

As shown in drawings, V is varistor, plays transient overvoltage protective effect in circuit；R3, C3 form capacitance-resistance voltage reduction circuit, give rectification circuit and carry out rectification after alternating current 220V voltage is reduced some volts；B2 is single phase bridge type rectifier circu, alternating current is become the unidirectional current of pulsation: IC3 and peripheral circuit composition three-terminal voltage-stabilizing circuit, selecting 7812 here is model, and the unidirectional current of pulsation is become the working power of the stable unidirectional current supply control circuit of comparison by it.

Claims

1. the method that LED street lamp is economized again 50% electric energy and wiring driver, it is characterised in that: circuit is made up of rectification circuit, filter circuit, luminous plaque circuit, three-terminal voltage-stabilizing circuit and timer circuit；Described rectification circuit adopts single-phase bridge rectifier, and 220V alternating current, after over commutation, filtering, exports the working power of the unidirectional current supply street lamp of about 300V；Described luminous plaque circuit, its LED chip has 84, and monolithic power is 1W, and wiring is a road series connection；Described three-terminal voltage-stabilizing pipe circuit, is connected into linear constant current working method to provide the operating current of constant LED street lamp by three-terminal voltage-stabilizing pipe；Described timer circuit, is used for setting timing, and within the time period set, street lamp is with vehement bright operating mode work；After the time counting set arrives, street lamp reduces about certain power automatically, with secretly bright operating mode work, it is achieved automatic dimming function；A kind of method that LED street lamp is economized 50% electric energy again and wiring, before change circuit, total consuming electric power of street lamp is 84W, and after change circuit, the consume electric energy of street lamp is 48W, decreases 36W, and illumination is equally constant；After timing automatic light modulation, street lamp subtracts the power of about 18W again；By the change of circuit and with an automatic light meter after, altogether save more than 50% electric energy, i.e. a kind of method that LED street lamp is economized again 50% electric energy and wiring, common LED street lamp can be made to economize the electric energy of more than 50% again.