CN205029936U - LED lighting system that can regulate and control - Google Patents
LED lighting system that can regulate and control Download PDFInfo
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- CN205029936U CN205029936U CN201520801945.3U CN201520801945U CN205029936U CN 205029936 U CN205029936 U CN 205029936U CN 201520801945 U CN201520801945 U CN 201520801945U CN 205029936 U CN205029936 U CN 205029936U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a LED lighting system that can regulate and control, including intelligent control module, PIR, illumination detection module, power driving module, LED load, display module and data storage module, power driving module is the digital LED drive power supply of intelligence, comprises main circuit and control circuit, and the main circuit comprises EMI ( electromagnetic interference ) filter circuit, rectification filter circuit, PFC ( power factor correction) circuit, anti - sharp formula power conversion circuit. Control circuit comprises current detection circuit, junction temperature detection circuitry, protection circuit, and control circuit is connected to the intelligent control module, this LED lighting system is that job stabilization, structure are simple reliable relatively, can according to sound automatic open close, the illumination intensity in automated inspection space personnel and detection ring border to can realize digitally controlled to the power, effectively reduce output current's ripple, realize the intelligent control of high -power LED junction temperature.
Description
Technical field
The present invention relates to a kind of illuminator, especially a kind of regulatable LED illumination System.
Background technology
Since the sixties in 20th century, the first in the world semiconductor diode was born, LED illumination, owing to having the characteristic of life-span long, energy-conservation, rich color, safety, environmental protection, is described as the third time revolution that the mankind are thrown light on.Energy-conserving and environment-protective are the maximum features of LED, and LED containing any noxious substance, is not the free of contamination Safety lamps and lanterns of complete environmental protection.Lighting energy saving is by generation two aspect benefit: the discharge of energy savings and minimizing carbon dioxide, this has very important realistic meaning in China.According to measuring and calculating, Chinese electric consumption on lighting accounts for 12% of electricity consumption total amount, if the incandescent lamp used all is replaced with LED, every year can save power 90,000,000,000 kilowatt hour, and be equivalent to the discharge of minimizing 9,000 ten thousand tons of carbon dioxide, energy-saving and emission-reduction have a high potential.The luminous efficiency of current white light LEDs reaches 1201m/W, is 8 times of incandescent lamp, be more than 2 times of fluorescent lamp, and its luminous efficiency also can constantly promote.LED replaces general lighting and not only offers convenience to us, economizes on the use of funds in the long run, protection of the environment, for descendants benefits.
And along with the development of intellectualizing system, LED illumination achieves Based Intelligent Control, for further according to photoenvironment needs, realize self-adjustable LED illumination System, if the patent No. is the problem that 201420814043.9 Chinese patent application being called " a kind of public classroom LED illumination intelligent control systems " mainly solve existing illuminator lighting waste of energy.Belonging to infrared sensor released respectively by main frame with power supply, LED daylight lamp tool, display module, heat, lighting detecting circuit, key-press module be connected, there is automatization level high, the feature of energy savings.These intelligent control systems solve the energy-conservation problem of LED illumination to a certain extent, and the heat radiation of LED illumination System itself, the problem of efficiency, but great power LED in use mainly exists junction temperature problem, when electric current is less than rated current, the luminous flux of LED is directly proportional to electric current; Under being operated in nominal current conditions, luminous flux is maximum, and afterwards along with electric current increases, luminous flux is tending towards saturated.If but LED works under nominal power always, after after a while, LED junction temperature can raise, the particularly great power LED of single more than power 1W, junction temperature rises can clearly.Higher junction temperature can affect the luminous efficiency of LED, photochromic and LED life-span etc.Existing LED drive power extensively adopts the constant current of simulation or the integrated power supply chip of constant voltage, as UC3842, TL494 etc. realize exporting.Analog switched power supply has developed a lot of year, and control technology is comparative maturity.It has a lot of shortcoming, and the element built needed for circuit is many, dispersed large; Circuit is just difficult to amendment once shaping, controls dumb, can not realize complicated control algolithm.
Summary of the invention
The object of the invention is, overcome the deficiency of art methods, there is provided a kind of working stability, structure relatively simple and reliable, can according to the intensity of illumination of the automatic open and close of sound, automatically detection space personnel and testing environment, and Digital Control can be realized to power supply, effectively reduce the ripple of output current, achieve the LED illumination System of the Based Intelligent Control of great power LED junction temperature.
For achieving the above object, following technical scheme is proposed:
A kind of regulatable LED control system, comprises intelligent control module, infrared detection module, illumination detection module, electric power driving module, LED load, display module and data memory module; Described infrared detection module human body infrared-ray statistical space number, and by the space number Signal transmissions that obtains to intelligent control module; The illumination brightness of described illumination detection module to environment detects, and the illumination luminance signal detected is transferred to intelligent control module after A/D conversion; Described intelligent control module processes space number signal, illumination luminance signal, and send a control signal afterwards, described control signal is sent to electric power driving module, regulates LED load electric current.
Described electric power driving module is intelligent digitalized LED drive power, be made up of main circuit and control circuit, main circuit is made up of EMI (electromagnetic interference) filter circuit, current rectifying and wave filtering circuit, PFC (Active PFC) circuit, flyback power translation circuit.Control circuit is made up of current detection circuit, junction temperature testing circuit, protective circuit; Control circuit is connected to intelligent control module, but intelligent control module single-chip microcomputer, computer.Intelligent digitalized LED drive power, achieves Digital Control to power supply, effectively reduces the ripple of output current, achieves the Based Intelligent Control of great power LED junction temperature.
The course of work of flyback power translation circuit is when switching tube conducting, forward voltage is added on the former limit winding of transformer, and secondary side diode is ended because being subject to reverse voltage, and vice-side winding does not have electric current to flow through, energy storage, in static exciter inductance, does not have energy to send load to.When the transistor is turned off, former limit winding produces a reverse potential, and the polarity of voltage on the winding of limit is also reverse, and secondary side diode forward conduction, static exciter inductance releases energy, and filter circuit and load have electric current to flow through.When transistor ends again, filter circuit continues to provide energy to load.
Producing electromagnetic interference during driving power work, in order to prevent electromagnetic interference from injecting electrical network by circuit, polluting electrical network, simultaneously also in order to prevent the electromagnetic interference in electrical network from entering power supply, adopting EMI (electromagnetic interference) filter circuit.
In order to improve the power factor of power supply, reaching the target setting of power, in electric power main circuit, adding power factor correction (PFC) circuit.
Switching tube is when turning off, and the parasitic capacitance of the meeting of transformer primary side leakage inductance and switching tube forms series resonance, and at leakage, two ends, the source generation due to voltage spikes of switching tube, this due to voltage spikes is enough to switching tube to puncture.In order to suppress due to voltage spikes, clamp circuit must be adopted.Adopt RCD clamp circuit in intelligent digitalized LED drive power, structure is simple, cost is low.
The course of work of control circuit is: intelligent control module is according to the output voltage values of Hall current sensor, space number signal and illumination luminance signal, utilize single neuron self-adaptation PID control algorithm, calculate corresponding control signal, the duty ratio of PWM ripple is calculated according to this control signal, and produce the PWM ripple of corresponding duty ratio, PWM ripple controls the break-make of metal-oxide-semiconductor, the square wave that frequency is 50KHz is obtained at transformer secondary, circuit is level and smooth after filtering, obtains constant current at output; Junction temperature testing circuit detects the junction temperature of great power LED, gives intelligent control module by temperature value, when temperature exceedes set point, reduces the output current of circuit.The protective circuits such as overvoltage, overcurrent, overload improve the stability of power supply.
The beneficial effects of the utility model:
LED illumination System of the present utility model simulates the large problem of the output current ripple of constant-current driving power supply for the junction temperature problem of great power LED and existing LED, devise the intelligent digitalized driving power of a kind of LED, make driving power have good controllability and very large extending space, and easily upgrade; This digital driving power supply can reduce the output current ripple coefficient of constant-current source, thus improves the quality of LED drive power, reduces the power consumption of great power LED, promotes the performance of LED light source.
Accompanying drawing explanation
Fig. 1 LED control circuit structured flowchart;
Fig. 2 digital driving power supply architecture figure;
Fig. 3 EMI filter circuit structure chart;
Fig. 4 common mode disturbances equivalent circuit diagram;
Fig. 5 differential mode interference equivalent circuit diagram;
Fig. 6 valley fill type passive PFC circuit topology diagram;
Fig. 7 RCD clamp circuit structure chart;
Fig. 8 RCD clamp circuit fundamental diagram.
Embodiment
Below in conjunction with accompanying drawing, LED illumination System of the present utility model is elaborated further:
As shown in Figure 1, a kind of regulatable LED control system, comprises intelligent control module, infrared detection module, illumination detection module, electric power driving module, LED load, display module and data memory module; Described infrared detection module human body infrared-ray statistical space number, and by the space number Signal transmissions that obtains to intelligent control module; The illumination brightness of described illumination detection module to environment detects, and the illumination luminance signal detected is transferred to intelligent control module after A/D conversion; Described intelligent control module processes space number signal, illumination luminance signal, and send a control signal afterwards, described control signal is sent to electric power driving module, regulates LED load electric current.
Again as shown in Figure 2, electric power driving module is intelligent digitalized LED drive power, be made up of main circuit and control circuit, main circuit is made up of EMI (electromagnetic interference) filter circuit, current rectifying and wave filtering circuit, PFC (Active PFC) circuit, flyback power translation circuit.Control circuit is made up of current detection circuit, junction temperature testing circuit, protective circuit; Control circuit is connected to intelligent control module, but intelligent control module single-chip microcomputer, computer.Intelligent digitalized LED drive power, achieves Digital Control to power supply, effectively reduces the ripple of output current, achieves the Based Intelligent Control of great power LED junction temperature.
As shown in Fig. 3,4 and 5, have employed passive EMI filter circuit in intelligent digitalized LED drive power, comprise common mode disturbances equivalent electric circuit and differential mode interference equivalent electric circuit, wherein electric capacity Cl, C2 suppresses differential mode interference; C3, C4 capacity is equal, and Main Function suppresses common mode disturbances, also plays the effect suppressing differential mode interference; The effect of common mode choke induction Lc suppresses common mode disturbances, and because coiling is asymmetric between two groups of Lc, there is leakage inductance Ls, Ls can suppress differential mode interference.L
dmain suppression differential mode interference, also has inhibitory action to common mode disturbances.The essence of passive EMI filter circuit is low pass filter, utilizes series inductance, shunt capacitance, filter away high frequency noise, and low frequency signal can zero-decremently be passed through, and cost is low, and requisite space is little.
As shown in Figure 6, PFC (Active PFC) circuit is valley fill type passive PFC circuit, its course of work is based on reduction output dc voltage, within each half period, elongated the time of AC-input voltage higher than VD, the angle of flow of rectifier diode just can increase and (is increased to about 120
oleft and right), the Dead Time of supply voltage zero passage then shortens, its current waveform is tending towards continuous, envelope is tending towards sinusoidal wave, such AC input current chases supply voltage transient change track, the power factor (PF) of circuit can be brought up to more than 0.9, power supply total harmonic distortion rate THD is reduced to less than 35%.
As shown in Figure 7,8, flyback power translation circuit comprises transformer, switching tube and clamp circuit, and described clamp circuit is loss-type passive clamp circuit; Clamp circuit is made up of resistance R, electric capacity C, diode D.The operation principle of RCD clamp circuit is: when switching tube S conducting, energy storage is in the inductance of former limit, when switching tube S ends, be stored in energy transferring in magnetizing inductance Lm to secondary inductance, but the energy in leakage inductance Ls cannot be passed to secondary, the effect of RCD clamp circuit is exactly consume these energy.When switching tube S just ends, primary current charges to the parasitic capacitance Cs of S, and secondary side diode D2 is still in cut-off state.When Cs both end voltage rises to Vi, secondary side diode D2 conducting, vice-side winding has electric current to flow through, now original edge voltage V
oRbe the voltage of vice-side winding voltage reflection to former limit, former limit leakage inductance charges to instantaneously parasitic capacitance Cs and clamping capacitance C1, and after the energy in leakage inductance discharges completely, reed position electric capacity C1 charges end.Electric capacity C1 and resistance R forms loop afterwards, and C1 discharges the energy of storage, and now diode D1 and switching tube S is in cut-off state.After switching tube conducting, C1 continues through resistance R and discharges, and diode D1, D2 end.
Flyback power translation circuit is DC chopper circuit, is the direct voltage of another magnitude of voltage by a DC voltage conversion.DC chopper circuit has two kinds of mode of operations: pulse width modulation mode (PWM) and pulse frequency modulated mode (PFM).PWM mode is comparatively general, and PFM pattern easily produces interference.PWM mode is adopted in this intelligent digitalized LED drive power.
Claims (7)
1. a regulatable LED illumination System, comprises intelligent control module, infrared detection module, illumination detection module, electric power driving module, LED load, display module and data memory module; Described infrared detection module human body infrared-ray statistical space number, and by the space number Signal transmissions that obtains to intelligent control module; The illumination brightness of described illumination detection module to environment detects, and the illumination luminance signal detected is transferred to intelligent control module after A/D conversion; Described intelligent control module processes space number signal, illumination luminance signal, and send a control signal afterwards, described control signal is sent to electric power driving module, regulates LED load electric current.
2. regulatable LED illumination System according to claim 1, it is characterized in that, described electric power driving module is intelligent digitalized LED drive power, be made up of main circuit and control circuit, main circuit is made up of EMI filter circuit, current rectifying and wave filtering circuit, pfc circuit, flyback power translation circuit, control circuit is made up of current detection circuit, junction temperature testing circuit, protective circuit, and control circuit is connected to intelligent control module;
In described main circuit, electric current is successively by EMI filter circuit, rectification circuit, pfc circuit, flyback power translation circuit and filter circuit, is transferred to LED load;
In described control circuit, intelligent control module is according to the output voltage values of Hall current sensor, space number signal and illumination luminance signal, utilize single neuron self-adaptation PID control algorithm, calculate corresponding control signal, the duty ratio of PWM ripple is calculated according to this control signal, and producing the PWM ripple of corresponding duty ratio, PWM ripple controls the break-make of metal-oxide-semiconductor, obtains at transformer secondary the square wave that frequency is 50KHz, circuit is level and smooth after filtering, obtains constant current at output; Junction temperature testing circuit detects the junction temperature of great power LED, gives intelligent control module by temperature value, when temperature exceedes set point, reduces the output current of circuit.
3. regulatable LED illumination System according to claim 2, is characterized in that, described EMI filter circuit is the passive EMI filter circuit comprising common mode disturbances equivalent electric circuit and differential mode interference equivalent electric circuit.
4. regulatable LED illumination System according to claim 2, is characterized in that, pfc circuit is valley fill type passive PFC circuit.
5. regulatable LED illumination System according to claim 2, is characterized in that, flyback power translation circuit comprises transformer, switching tube and clamp circuit, and described clamp circuit is loss-type passive clamp circuit.
6. regulatable LED illumination System according to claim 2, is characterized in that, flyback power translation circuit is the DC chopper circuit of the direct voltage of another magnitude of voltage by a DC voltage conversion; Flyback power translation circuit adopts PWM mode.
7. regulatable LED illumination System according to claim 1 and 2, is characterized in that, described intelligent control module is single-chip microcomputer or computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520801945.3U CN205029936U (en) | 2015-10-13 | 2015-10-13 | LED lighting system that can regulate and control |
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| CN201520801945.3U CN205029936U (en) | 2015-10-13 | 2015-10-13 | LED lighting system that can regulate and control |
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| CN205029936U true CN205029936U (en) | 2016-02-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450259A (en) * | 2018-12-18 | 2019-03-08 | 温州大学 | A kind of inverse-excitation type switch power-supply |
| CN111035352A (en) * | 2019-12-30 | 2020-04-21 | 华南理工大学 | High-power brightness-adjustable endoscope cold light source and control system thereof |
| CN111491431A (en) * | 2020-01-17 | 2020-08-04 | 深圳市海洋王照明工程有限公司 | Temperature control type dimming circuit and lamp |
-
2015
- 2015-10-13 CN CN201520801945.3U patent/CN205029936U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450259A (en) * | 2018-12-18 | 2019-03-08 | 温州大学 | A kind of inverse-excitation type switch power-supply |
| CN109450259B (en) * | 2018-12-18 | 2021-02-19 | 温州大学 | Flyback switching power supply |
| CN111035352A (en) * | 2019-12-30 | 2020-04-21 | 华南理工大学 | High-power brightness-adjustable endoscope cold light source and control system thereof |
| CN111491431A (en) * | 2020-01-17 | 2020-08-04 | 深圳市海洋王照明工程有限公司 | Temperature control type dimming circuit and lamp |
| CN111491431B (en) * | 2020-01-17 | 2022-03-11 | 深圳市海洋王照明工程有限公司 | Temperature control type dimming circuit and lamp |
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Granted publication date: 20160210 |