CN201774701U

CN201774701U - Light-emitting diode (LED) uninterrupted lighting circuit for underground construction site

Info

Publication number: CN201774701U
Application number: CN2010202913825U
Authority: CN
Inventors: 田根茂
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-03
Filing date: 2010-08-03
Publication date: 2011-03-23
Anticipated expiration: 2020-08-03

Abstract

The utility model discloses a light-emitting diode (LED) uninterrupted lighting circuit for an underground construction site. The circuit consists of a switch rectifier, a valve-regulated lead-acid storage battery and an LED lamp with a constant current controller, wherein the switch rectifier comprises an alternating-current distribution module, a high-frequency switch rectifying module, a monitoring and display module and the like; and a constant current driver circuit in the LED lamp is a reduction voltage switching circuit. The LED uninterrupted lighting circuit has the advantages of novel structure, low cost, long service life, good electricity-saving effect, high reliability and the like, and is easy to popularize and use widely.

Description

The LED continuous illumination circuit of going to the building site

Technical field

The utility model relates to the LED continuous illumination circuit of going to the building site a kind ofly.

Background technology

In recent years, the place of going to the building site, ground such as mine, subway so owing to throughout the year in underground operation illuminating lamp is had very high requirement, not only require economize on electricity, high brightness, long-life, must guarantee that also continuation throws light on.Incandescent lamp commonly used at present, high-pressure sodium lamp etc. all are to be powered by AC network.Power outage also unavoidably appears in the AC network of optimal design.In order to ensure underground persistence illumination, all Emergency Lighting Supply must be installed usually, this power supply partly is made up of rectifier, storage battery and inverter etc.During the electrical network normal power supply, alternating current becomes direct current and charges a battery behind rectifier, and when the electrical network interruption of power supply, storage battery becomes alternating current to direct current by inverter, powers to lighting.This lasting illuminator cost is very high, simultaneously, because through repeatedly conversion, power consumption is also bigger.Semi-conductor lighting lamp (LED) by DC power supply is developed rapidly in recent years, this illuminating lamp is than incandescent lamp economize on electricity 90%, higher more than 40% than the luminous intensity of common fluorescent lamp and high-pressure sodium lamp with LED under the constant power, and the life-span of LED lamp can reach 100,000 hours, color rendering index can reach more than 80, is higher than high-pressure sodium lamp far away.Because adopt the power supply of direct current constant current, the LED lamp can not go out stroboscopic, therefore become at present the best green illumination light fixture that generally acknowledge countries in the world.

The utility model content

The purpose of this utility model is at the deficiencies in the prior art part, the LED continuous illumination circuit of going to the building site is provided a kind ofly, and the problem that exists for present underground lighting systems such as mine, subway provides that a kind of novel structure, cost are low, long service life, power savings is good, reliability is high lighting circuit.

The technical solution of the utility model is: the LED continuous illumination circuit of going to the building site comprises a kind ofly:

Switching rectifier is used for the alternating current of electrical network is become direct current;

Storage battery is used for stored electric energy;

Led array comprises at least one LED;

It is characterized in that: described switching rectifier partly is made up of AC distribution module, high frequency switching rectifier module, monitoring and display module etc., multichannel high frequency switching rectifier module and monitoring module are connected in parallel between AC distribution module and the display module, monitoring module also is connected with each road high frequency switching rectifier module respectively, and output is connected to local monitor and long-distance monitorng device; The built-in constant-current drive circuit of LED lamp adopts the buck switching circuit.

The beneficial effects of the utility model are: it can reduce the initial investment of persistence illuminator greatly, because saved the most expensive high power contravariant device of price in the utility model emergency lighting system, system cost approximately reduces by 40%, adopt the LED lamp, can economize on electricity 40%, therefore the capacity of rectifier and storage battery all can reduce by 40%, the cost of system can also reduce by 20% like this, reduced linear transformation simultaneously, system effectiveness and reliability improve greatly, in addition, the LED lamp can save the AC/DC conversion fraction directly by powered by direct current, and the cost of LED lamp control circuit reduces greatly, the reliability effect maximum of while AC/DC transfer pair LED lamp, save this part circuit, the reliability of every LED lamp will improve greatly, and the life-span also will prolong greatly.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is that the utility model is formed structured flowchart.

The composition structured flowchart of Fig. 2 switching rectifier.

Fig. 3 is a LED constant-current drive circuit circuit diagram.

Embodiment

As shown in Figure 1, form structured flowchart, form by the LED lamp of switching rectifier, valve-regulated lead-acid battery, band constant-current controller for the utility model.The main effect of rectifier is that the alternating current with electrical network becomes direct current, so that to charge in batteries with give the power supply of LED lamp.High efficiency switch type rectifier of each place that needs configuration.When storage battery begins to charge, this rectifier output constant current, when battery voltage reaches setting, switching rectifier is exported constant voltage automatically, supply with LED lamp constant voltage on the one hand, supply with storage battery floating charge electric current on the other hand, guarantee in the course of work, storage battery remains the full charge state.

As shown in Figure 2, be the composition structured flowchart of switching rectifier.Switching rectifier partly is made up of AC distribution module, high frequency switching rectifier module, monitoring and display module etc.In order to ensure the switching rectifier reliably working, a plurality of rectification module parallel operations, and adopt the N+1 redundancy electric power supply system.In the course of work, even some modules break down, other modules still can guarantee power supply.Monitoring module can the pilot switch rectifier, the various parameters of batteries and LED.By communication interface, remote monitoring can be implemented to the switching rectifier in each place, storage battery, LED lamp in the buried control center.

The main effect of storage battery is a stored electric energy, mains supply just often, rectifier charges a battery, in case power failure appears in electrical network, storage battery can be given the power supply of LED lamp immediately, the power and the lighting hours that requires after assurance has a power failure of LED are installed in going to the building site in the base area, are selected the capacity of required storage battery.The kind of storage battery is a lot, but the capacity of each required storage battery in place, building site is all bigger, therefore should select the lower valve-regulated lead-acid battery of price.Uninterrupted in order to ensure illumination, batteries is preferably selected two groups for use, the one group of usefulness of deciding, and another group is done standby.

The built-in constant-current drive circuit of LED lamp adopts the buck switching circuit as shown in Figure 3, and this circuit has wide input voltage range, control efficiency advantages of higher.M among the figure ₁Be switch adjustment pipe, D ₁Be fly-wheel diode, L ₁Be afterflow inductance, R _CSBe current sampling resistor.When the electric current that flows through the LED lamp changes, sampling resistor R _CSThe two ends step-down changes, and this voltage is sent into the current feedback pin I of integrated circuit IRS2540 _FB, with the reference voltage of inside relatively after, control signal changes switch adjustment pipe M ₁The output pulse duty factor, and by fly-wheel diode, afterflow inductance L ₁Guarantee the current constant of LED lamp.Bootstrap diode D among the figure _BOOTWith bootstrap capacitor C _BOOTForm high-end boostrap circuit, driving switch adjustment pipe high-frequency work.Diode D _VCC, capacitor C _VCCWith diode D _CLAMPForm power circuit, supply voltage is provided for integrated circuit IRS2540.Diode D _OV, resistance R _OV1, R _OV2Form open loop protection circuit, by diode D _EN1Add pulse signal, can turn-off the LED lamp, also can adjust the brightness of LED lamp.

The LED lamp has constant-current drive circuit, and its effect is that DC input voitage is transformed to the required constant current of LED lamp, guarantees the safe and reliable work of LED lamp.Place, building site area is very big, adopt the low-voltage direct technology of transmission of electricity, to produce certain pressure drop on the power transmission line, therefore being added to every voltage on the LED lamp will have certain fluctuation, especially have no progeny in the mains supply, and the mains ripple of storage battery is bigger, therefore must guarantee that the electric current of all LED lamps all keeps constant by constant-current control circuit, the LED lamp also needs to install the radiator with certain area, could reduce the working temperature of LED lamp, guarantees that the life-span of LED reached more than 50,000 hours.The lampshade that the LED lamp adopts metallic aluminium to make, lampshade also can be realized the heat sinking function of LED lamp like this.

Claims

1. ground LED continuous illumination circuit of going to the building site comprises:

Storage battery is used for stored electric energy;

Led array comprises at least one LED;

It is characterized in that: described switching rectifier partly is made up of AC distribution module, high frequency switching rectifier module, monitoring and display module etc., multichannel high frequency switching rectifier module and monitoring module are connected in parallel between AC distribution module and the display module, monitoring module also is connected with each road high frequency switching rectifier module respectively, and its output is connected to local monitor and long-distance monitorng device; The built-in constant-current drive circuit of LED lamp adopts the buck switching circuit.