CN101925216B

CN101925216B - LED street lamp

Info

Publication number: CN101925216B
Application number: CN 201010235148
Authority: CN
Inventors: 李耀泉; 黄渊
Original assignee: ZHONGSHAN CITY BAOYING ELECTRIC APPLIANCES CO Ltd; ZHONGSHAN WEIHE ELECTRICAL APPLIANCES CO Ltd
Current assignee: ZHONGSHAN CITY BAOYING ELECTRIC APPLIANCES CO Ltd; ZHONGSHAN WEIHE ELECTRICAL APPLIANCES CO Ltd
Priority date: 2010-07-23
Filing date: 2010-07-23
Publication date: 2013-02-13
Anticipated expiration: 2030-07-23
Also published as: CN101925216A

Abstract

The invention discloses an LED street lamp which comprises an LED lamp source and a power source, wherein the power source comprises an input filtering circuit, a rectifying circuit, a high-frequency control circuit, an output rectifying filtering circuit and a detection control circuit; a constant current control circuit is connected between the output end of the output rectifying filtering circuit and the detection control circuit; and a power factor adjusting circuit is connected between the output end of the rectifying circuit and the high-frequency control circuit. The product adopts a high-frequency switch constant current power source; the power factor of the power source is higher than 0.96; the power utilization rate is high; protections against lightning strike, overcurrent, overvoltage and temperature rise are provided; the lamp source is a 60W LED lamp which has low power consumption and a service life of 10 years or more; the light source does not need to be replaced over the lifetime (the traditional street lamp is replaced once) and the maintenance cost is saved.

Description

A kind of LED street lamp

Technical field

The present invention relates to a kind of street lamp, especially relate to a kind of LED street lamp that adopts HF switch constant current waterproof power supply.

Background technology

Be installed at present highway, municipal highway master/subsidiary road, school, hospital, the street lamp of the roads such as house residential quarter mostly is high-pressure sodium lamp.The high-pressure sodium lamp light source of now market circulation can reach 15000-20000 hour in the lower life-span of operational environment of normal voltage, can be owing to operating voltage exists very large fluctuation to make the actual life of light source less than 6000 hours (approximately 1.5 years) with respect to normal voltage, the average life of ballast is 2.5-3 approximately, useful life is relatively short, and installation and maintenance cost, the operation power consumption cost of changing the elements such as sodium vapor lamp light source, ballast are all relatively high, energy-conservation not.

Summary of the invention

For the problems referred to above, the invention provides a kind of life-span length, installation and maintenance cost, operation power consumption cost is low, and adopt the LED street lamp of HF switch constant-current supply.

The present invention is that the technical scheme that its technical problem of solution adopts is:

A kind of LED street lamp, comprise LED lamp source and power supply, power supply comprises input filter circuit, rectification circuit, high frequency control circuit, output rectifier and filter and detects control circuit, is connected with constant-current control circuit between described output rectifier and filter output and the detection control circuit; Be connected with the power factor regulation circuit between described rectification circuit output end and the high frequency control circuit.

The invention has the beneficial effects as follows: the present invention adopts the HF switch constant-current supply, and this electrical source power factor is up to more than 0.96, and utilization rate of electrical is high, also is provided with thunderbolt, overcurrent, overvoltage, temperature rise protection; The lamp source is the LED lamp of 60W, and the LED lamp is the harmful element such as mercurous sodium not, can be to environment, and color rendering is better than traditional sodium vapor lamp, can create more comfortable visual environment, promotes fail safe, in addition, LED is low in energy consumption, and continual and steady the powering for the LED lamp of HF switch constant current waterproof power supply energy, and the LED lamp can be used 50000 hours continuously, reach useful life more than 10 years, need not change light source all the life, conventional road lamp is changed once, maintenance cost saving.

Description of drawings

The invention will be further described below in conjunction with the drawings and specific embodiments:

Fig. 1 is the functional-block diagram of embodiment of the invention power supply;

Fig. 2 is the circuit theory diagrams of embodiment of the invention power supply

Fig. 3 is the annexation figure of the embodiment of the invention.

Embodiment

With reference to Fig. 1, a kind of LED street lamp, comprise LED lamp source 2 and power supply 1, this power supply is that the HF switch constant-current supply comprises input filter circuit 11, rectification circuit 12, high frequency control circuit 13, output rectifier and filter 14 and detects control circuit 15, it is characterized in that: be connected with constant-current control circuit 16 between the output of described output rectifier and filter 14 and the detection control circuit 15; Be connected with and power factor regulation circuit 17 between the output of described rectification circuit 12 and the high frequency control circuit 13.

With further reference to Fig. 2, the power circuit of this invention street lamp directly accesses input filter circuit 11 with the civil power of 220V through fuse F1, this circuit is comprised of capacitor C Y1, CY2 and reactance L1, the end of capacitor C Y1 links to each other with 1 pin of reactance L1, ground connection after the other end links to each other with the end of capacitor C Y2, the other end of capacitor C Y2 links to each other with 4 pin of reactance L1, this circuit filters the clutter that exists in the electrical network, the clutter that hinders simultaneously the machine generation feeds back to public electric wire net, again the power supply after filtering is input to rectification circuit 12; In addition, be connected with resistance R 1, the R2 of lightning protection and overvoltage protection at 1,3 pin of reactance L1, resistance R 1, R2 are in parallel.

Power supply is input to the rectification circuit 12 that is comprised of 4 diode D1 bridge heaps through filtering, this circuit is more level and smooth direct current with the AC rectification in the electrical network directly; In addition, at rectification circuit 12 rear connection power factor regulation circuit 17, power factor regulation circuit 17 is comprised of diode D2, D3, D4 and capacitor C 2, C3; Diode D2 and the output that is connected to rectification circuit 12 after capacitor C 3 is connected, diode D4 be attempted by diode D2 and capacitor C 3 two ends after capacitor C 2 is connected, diode D3 bridge joint is between capacitor C 2 and diode D2; Electric current is by diode D2 in the circuit, D3, forward and reverse conducting principle of D4 reaches capacitor C 2, the C3 discharge principle, input current is modulated, to capacitor C 2, the charging of C3 was finished through charging repeatedly within per cycle of rectification, reduced the concentration of energy of once charging and causing, make the input current peak reduction, Harmonics of Input is improved, widened the angle of flow, and then raising power factor, improved traditional rectification circuit 2 because the existence of energy storage smoothing capacity makes input current produce spike, the angle of flow of electric current is very little, cause power factor low, the deficiency of humorous wave height.

Power supply is input to the high frequency control circuit 13 that is comprised of power supply adaptor J1, switching tube Q1 and the elements such as transformer HB1, HB2 through power factor regulation circuit 17, this circuit is alternating current with the dc inverter of input, again by output rectifier and filter 14 outputs.

Between high frequency control circuit 3 and output rectifier and filter 14, be connected with and detect control circuit 15, this circuit is comprised of elements such as photoelectrical coupler U1, thyristor U2, detecting control circuit 15 takes a sample from output, through comparing with set point, and then control inverter in the high frequency control circuit 13, change its frequency or pulsewidth, reach stable output.

Between output rectifier and filter 4 and detection control circuit 15, be connected with constant-current control circuit 16, this circuit is comprised of triode Q2, capacitor C 12 and resistance R 11, R12, the collector electrode of triode Q2 is connected to and detects control circuit 15, emitter is connected to the output of circuit by resistance R 11, base stage then is connected to the output of circuit by capacitor C 12 and resistance R 12, and capacitor C 12 is in parallel with resistance R 12; The electric current of this circuit supply load LED is consistent, export the constant function of current, the control mode that adopts is resistance R 11 that resistance is little of series connection in the negative pole of rectification output, make resistance R 11 two ends produce a pressure drop, base stage control triode Q2 through resistance R 12 to triode Q2 makes the control end of photoelectrical coupler U1 keep a stable magnitude of voltage and the effect of the control output current that plays.

Its power factor of HF switch constant-current supply power supply of making by such scheme is greater than 0.95, efficient is up to 92%, input current waveform harmonic distortion is less than 5%, and therefore electric current, the voltage of output are all very stable, apply on the LED street lamp and can play good effect.

More than be that better enforcement of the present invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of spirit of the present invention, the distortion that these are equal to or replacement all are included in the application's claim limited range.

Claims

1. LED street lamp, comprise LED lamp source (2) and power supply (1), power supply (1) comprises input filter circuit (11), rectification circuit (12), high frequency control circuit (13), output rectifier and filter (14) and detects control circuit (15), it is characterized in that: be connected with constant-current control circuit (16) between described output rectifier and filter (14) output and the detection control circuit (15); Be connected with power factor regulation circuit (17) between described rectification circuit (12) output and the high frequency control circuit (13); Wherein, described power factor regulation circuit (17) is comprised of diode D2, D3, D4 and capacitor C 2, C3; Diode D2 and the output that is connected to rectification circuit (12) after capacitor C 3 is connected, diode D4 be attempted by diode D2 and capacitor C 3 two ends after capacitor C 2 is connected, diode D3 bridge joint is between capacitor C 2 and diode D2; Described constant-current control circuit (16) is comprised of triode Q2, capacitor C 12 and resistance R 11, resistance R 12; The collector electrode of triode Q2 is connected to and detects control circuit (15), and emitter is connected to resistance R 12 by resistance R 11, and base stage then is connected to the output of output rectifier and filter (14) by resistance R 12, and capacitor C 12 is connected in parallel on resistance R 12 two ends.

2. a kind of LED street lamp according to claim 1, it is characterized in that: described input filter circuit (11) is comprised of capacitor C Y1, CY2 and reactance L1, the end of capacitor C Y1 links to each other with the output plus terminal of reactance L1, ground connection after the other end links to each other with the end of capacitor C Y2, the other end of capacitor C Y2 links to each other with the output negative terminal of reactance L1; Lightning protection and overvoltage protection resistance R 1, R2 are connected in parallel on the input of reactance L1.