CN101965078B - Light emitting diode drive circuit, light emitting diode luminaire and light emitting diode lighting system - Google Patents

Light emitting diode drive circuit, light emitting diode luminaire and light emitting diode lighting system Download PDF

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Publication number
CN101965078B
CN101965078B CN2009101090269A CN200910109026A CN101965078B CN 101965078 B CN101965078 B CN 101965078B CN 2009101090269 A CN2009101090269 A CN 2009101090269A CN 200910109026 A CN200910109026 A CN 200910109026A CN 101965078 B CN101965078 B CN 101965078B
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Prior art keywords
bridge rectifier
output
inductance
switching tube
ballast
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Expired - Fee Related
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CN2009101090269A
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Chinese (zh)
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CN101965078A (en
Inventor
毛秋翔
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Sangda Industry Co., Ltd., Shenzhen
Shenzhen SED International Power Technology Co., Ltd.
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SHENZHEN SED BAILI ELECTRONICS CO Ltd
SANGDA INDUSTRY Co Ltd SHENZHEN
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Abstract

The invention is suitable for the lighting technical field and provides a light emitting diode (LED) drive circuit, an LED luminaire and an LED lighting system. The lighting system comprises a ballast and the LED luminaire connected with the ballast, wherein the LED luminaire contains a plurality of LED lamps; and the LED luminaire also contains the LED drive circuit which are separately connected with the ballast and the LED lamps. In the LED lighting system of the invention, the power storage element of the LED drive circuit and the inductor of the ballast form a loop to generate the exciting current and ensure that the normal operation of the oscillating circuit of the ballast can be maintained. Therefore, when the ballast is used to drive LED lamps with low power, the ballast can not be in an intermittent state or a complete stop state so that the operation state of the LED lighting system is very stable.

Description

A kind of led drive circuit, LED light fixture and LED illuminator
Technical field
The invention belongs to the technical field of illumination, relate in particular to a kind of led drive circuit, LED light fixture and LED illuminator.
Background technology
Traditional illuminator generally includes ballast and by the light fixture of ballast driven, ballast converts civil power 220V alternating current to low-voltage AC, is used for lighting light fixture then.
Appearance along with the LED light fixture, the LED light fixture possesses the high advantage of luminous efficiency, so the LED light fixture replaced traditional light fixture gradually, and Fig. 1 shows the structure of existing LED illuminator, it comprises ballast 10 and LED light fixture 20, and LED light fixture 20 comprises led drive circuit 21 and LED lamp 22 again.
But, LED light fixture 20 is compared with traditional light fixture, power is less, and ballast 10 is to work according to the vibration of the oscillating circuit of its inside, and the frequency of oscillation of oscillating circuit is relevant with load, if load is little, the exciting current of the oscillating circuit of ballast 10 inside can be very little, and ballast 10 will be in intermittently or the state that quits work fully, therefore adopts traditional ballast 10 to remove driving LED light fixture 20, the operating state of LED illuminator is very unstable, can't keep operate as normal.
Summary of the invention
The object of the present invention is to provide a kind of led drive circuit, be intended to solve the problem that there is unstable working condition in existing LED illuminator.
The present invention is achieved in that a kind of led drive circuit, and described led drive circuit comprises:
With the energy storage device that the output of ballast is connected, the inductance of described energy storage device and described ballast constitutes the loop, produces exciting current, makes the oscillating circuit of described ballast keep operate as normal, the output low-voltage AC; And
The driver module that is connected with the LED lamp with described energy storage device respectively, described driver module is converted to direct current with the low-voltage AC of described ballast output, drives the work of described LED lamp;
Described energy storage device is second inductance, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second inductance connect the output of described ballast respectively, the two ends of described second inductance also connect the input of described bridge rectifier respectively, first output of described bridge rectifier is by first inductance and the drain electrode that connects electronic switching tube of LED lamp of serial connection, the source electrode of described electronic switching tube connects second output of bridge rectifier, described first electric capacity is in parallel with described LED lamp, the anode of described diode connects the drain electrode of described electronic switching tube, and the negative electrode of described diode connects first output of described bridge rectifier;
Perhaps, described energy storage device is second electric capacity, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second electric capacity connect the output of described ballast respectively, the two ends of described second electric capacity also connect the input of described bridge rectifier respectively, first output of described bridge rectifier is by first inductance and the drain electrode that connects electronic switching tube of LED lamp of serial connection, the source electrode of described electronic switching tube connects second output of bridge rectifier, described first electric capacity is in parallel with described LED lamp, the anode of described diode connects the drain electrode of described electronic switching tube, and the negative electrode of described diode connects first output of described bridge rectifier;
Perhaps, described energy storage device is second inductance, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second inductance connect the output of described ballast respectively, the two ends of described second inductance also connect the input of described bridge rectifier respectively, the first output first via of described bridge rectifier connects the drain electrode of electronic switching tube by first inductance, the source electrode of described electronic switching tube connects second output of bridge rectifier, first output the second tunnel of described bridge rectifier connects the negative electrode of diode by first electric capacity, the first output Third Road of described bridge rectifier connects the negative electrode of diode by the LED lamp, and the anode of described diode connects the drain electrode of described electronic switching tube;
Perhaps, described energy storage device is second electric capacity, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second electric capacity connect the output of described ballast respectively, the two ends of described second electric capacity also connect the input of described bridge rectifier respectively, the first output first via of described bridge rectifier connects the drain electrode of electronic switching tube by first inductance, the source electrode of described electronic switching tube connects second output of bridge rectifier, first output the second tunnel of described bridge rectifier connects the negative electrode of diode by first electric capacity, the first output Third Road of described bridge rectifier connects the negative electrode of diode by the LED lamp, and the anode of described diode connects the drain electrode of described electronic switching tube.
Another object of the present invention is to provide a kind of LED light fixture, described LED light fixture comprises a plurality of LED lamps, and described LED light fixture also comprises above-mentioned led drive circuit.
Another object of the present invention is to provide a kind of LED illuminator, described LED illuminator comprises ballast, and described LED illuminator also comprises and being connected with described ballast, above-mentioned LED light fixture.
In the present invention, the energy storage device of led drive circuit and the inductance of ballast constitute the loop, produce exciting current, make the oscillating circuit of ballast keep operate as normal, therefore ballast is when driving low power LED light fixture, can not be in intermittence or the state that quits work fully, make that the operating state of LED illuminator is highly stable.
Description of drawings
Fig. 1 is the structure chart of existing LED illuminator;
Fig. 2 is the structure chart of the LED illuminator that provides of the embodiment of the invention;
Fig. 3 is the exemplary circuit figure of the led drive circuit that provides of first embodiment of the invention;
Fig. 4 is the exemplary circuit figure of the led drive circuit that provides of second embodiment of the invention;
Fig. 5 is the exemplary circuit figure of the led drive circuit that provides of third embodiment of the invention;
Fig. 6 is the exemplary circuit figure of the led drive circuit that provides of fourth embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
Fig. 2 shows the structure of the LED illuminator that the embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention.
The LED illuminator comprises ballast 100 and the LED light fixture 200 that is connected with ballast 100, LED light fixture 200 comprises a plurality of LED lamps 202, LED light fixture 200 also comprises respectively the led drive circuit 201 that is connected with LED lamp 202 with ballast 100, led drive circuit 201 comprises the energy storage device 2011 that is connected with the output of ballast 100, and the driver module 2012 that is connected with LED lamp 202 with energy storage device 2011 respectively.
Energy storage device 2011 constitutes the loop with the inductance of ballast 100, produces exciting current, makes the oscillating circuit of ballast 100 keep operate as normal, the output low-voltage AC; Driver module 2012 is converted to direct current with the low-voltage AC of ballast 100 outputs, 202 work of driving LED lamp.
Fig. 3 shows the exemplary circuit structure of the led drive circuit that first embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention.
Energy storage device 2011 is second inductance L 2, driver module 2012 comprises first inductance L 1, first capacitor C 1, diode D1, bridge rectifier U1 and electronic switching tube Q1, the two ends of second inductance L 2 connect the output of ballast 100 respectively, the two ends of second inductance L 2 also connect the input of bridge rectifier U1 respectively, first output of bridge rectifier U1 is by first inductance L 1 and LED lamp 202 drain electrode that meets electronic switching tube Q1 of serial connection, the source electrode of electronic switching tube Q1 connects second output of bridge rectifier U1, first capacitor C 1 is in parallel with LED lamp 202, the anode of diode D1 connects the drain electrode of electronic switching tube Q1, and the negative electrode of diode D1 connects first output of bridge rectifier U1.
The operation principle of this led drive circuit is:
Second inductance L 2 constitutes the loop with the inductance of ballast 100, produce exciting current, make the oscillating circuit of ballast 100 keep operate as normal, make that ballast 100 output voltages are normal, and second inductance L 2 can consumed power, so can play the effect of dummy load.
Bridge rectifier U1 is converted to direct voltage with the alternating voltage of ballast 100 outputs, during electronic switching tube Q1 conducting, the direct voltage of bridge rectifier U1 output provides energy for first inductance L 1, first inductance L, 1 storage power, when electronic switching tube Q1 ends, energy on first inductance L 1 releases energy to LED lamp 202 by diode D1, thereby lights LED lamp 202.
Fig. 4 shows the exemplary circuit structure of the led drive circuit that second embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention.
Energy storage device 2011 is second capacitor C 2, driver module 2012 comprises first inductance L 1, first capacitor C 1, diode D1, bridge rectifier U1 and electronic switching tube Q1, the two ends of second capacitor C 2 connect the output of ballast 100 respectively, the two ends of second capacitor C 2 also connect the input of bridge rectifier U1 respectively, first output of bridge rectifier U1 is by first inductance L 1 and LED lamp 202 drain electrode that meets electronic switching tube Q1 of serial connection, the source electrode of electronic switching tube Q1 connects second output of bridge rectifier U1, first capacitor C 1 is in parallel with LED lamp 202, the anode of diode D1 connects the drain electrode of electronic switching tube Q1, and the negative electrode of diode D1 connects first output of bridge rectifier U1.
The operation principle of this led drive circuit is:
Second capacitor C 2 constitutes the loop with the inductance of ballast 100, produce exciting current, make the oscillating circuit of ballast 100 keep operate as normal, make that ballast 100 output voltages are normal, and second capacitor C 2 can consumed power, so can play the effect of dummy load.
Bridge rectifier U1 is converted to direct voltage with the alternating voltage of ballast 100 outputs, during electronic switching tube Q1 conducting, the direct voltage of bridge rectifier U1 output provides energy for first inductance L 1, first inductance L, 1 storage power, when electronic switching tube Q1 ends, energy on first inductance L 1 releases energy to LED lamp 202 by diode D1, thereby lights LED lamp 202.
Fig. 5 shows the exemplary circuit structure of the led drive circuit that third embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention.
Energy storage device 2011 is second inductance L 2, driver module 2012 comprises first inductance L 1, first capacitor C 1, diode D1, bridge rectifier U1 and electronic switching tube Q1, the two ends of second inductance L 2 connect the output of ballast 100 respectively, the two ends of second inductance L 2 also connect the input of bridge rectifier U1 respectively, the first output first via of bridge rectifier U1 connects the drain electrode of electronic switching tube Q1 by first inductance L 1, the source electrode of electronic switching tube Q1 connects second output of bridge rectifier U1, first output the second tunnel of bridge rectifier U1 connects the negative electrode of diode D1 by first capacitor C 1, the first output Third Road of bridge rectifier U1 connects the negative electrode of diode D1 by LED lamp 202, and the anode of diode D1 connects the drain electrode of electronic switching tube Q1.
The operation principle of this led drive circuit is:
Second inductance L 2 constitutes the loop with the inductance of ballast 100, produce exciting current, make the oscillating circuit of ballast 100 keep operate as normal, make that ballast 100 output voltages are normal, and second inductance L 2 can consumed power, so can play the effect of dummy load.
Bridge rectifier U1 is converted to direct voltage with the alternating voltage of ballast 100 outputs, during electronic switching tube Q1 conducting, the direct voltage of bridge rectifier U1 output provides energy for first inductance L 1, first inductance L, 1 storage power, when electronic switching tube Q1 ended, the energy on first inductance L 1 released energy to LED lamp 202 by diode D1, thereby lights LED lamp 202, by the ON time of control electronic switching tube Q1, can control the energy storage size of first inductance L 1.
Fig. 6 shows the exemplary circuit structure of the led drive circuit that fourth embodiment of the invention provides, and for convenience of explanation, only shows part related to the present invention.
Energy storage device 2011 is second capacitor C 2, driver module 2012 comprises first inductance L 1, first capacitor C 1, diode D1, bridge rectifier U1 and electronic switching tube Q1, the two ends of second capacitor C 2 connect the output of ballast 100 respectively, the two ends of second capacitor C 2 also connect the input of bridge rectifier U1 respectively, the first output first via of bridge rectifier U1 connects the drain electrode of electronic switching tube Q1 by first inductance L 1, the source electrode of electronic switching tube Q1 connects second output of bridge rectifier U1, first output the second tunnel of bridge rectifier U1 connects the negative electrode of diode D1 by first capacitor C 1, the first output Third Road of bridge rectifier U1 connects the negative electrode of diode D1 by LED lamp 202, and the anode of diode D1 connects the drain electrode of electronic switching tube Q1.
The operation principle of this led drive circuit is:
Second capacitor C 2 constitutes the loop with the inductance of ballast 100, produce exciting current, make the oscillating circuit of ballast 100 keep operate as normal, make that ballast 100 output voltages are normal, and second capacitor C 2 can consumed power, so can play the effect of dummy load.
Bridge rectifier U1 is converted to direct voltage with the alternating voltage of ballast 100 outputs, during electronic switching tube Q1 conducting, the direct voltage of bridge rectifier U1 output provides energy for first inductance L 1, first inductance L, 1 storage power, when electronic switching tube Q1 ended, the energy on first inductance L 1 released energy to LED lamp 202 by diode D1, thereby lights LED lamp 202, by the ON time of control electronic switching tube Q1, can control the energy storage size of first inductance L 1.
In embodiments of the present invention, the energy storage device of led drive circuit and the inductance of ballast constitute the loop, produce exciting current, make the oscillating circuit of ballast keep operate as normal, therefore ballast is when driving low power LED light fixture, can not be in intermittence or the state that quits work fully, make that the operating state of LED illuminator is highly stable.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (3)

1. a led drive circuit is characterized in that, described led drive circuit comprises:
With the energy storage device that the output of ballast is connected, the inductance of described energy storage device and described ballast constitutes the loop, produces exciting current, makes the oscillating circuit of described ballast keep operate as normal, the output low-voltage AC; And
The driver module that is connected with the LED lamp with described energy storage device respectively, described driver module is converted to direct current with the low-voltage AC of described ballast output, drives the work of described LED lamp;
Described energy storage device is second inductance, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second inductance connect the output of described ballast respectively, the two ends of described second inductance also connect the input of described bridge rectifier respectively, first output of described bridge rectifier is by first inductance and the drain electrode that connects electronic switching tube of LED lamp of serial connection, the source electrode of described electronic switching tube connects second output of bridge rectifier, described first electric capacity is in parallel with described LED lamp, the anode of described diode connects the drain electrode of described electronic switching tube, and the negative electrode of described diode connects first output of described bridge rectifier;
Perhaps, described energy storage device is second electric capacity, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second electric capacity connect the output of described ballast respectively, the two ends of described second electric capacity also connect the input of described bridge rectifier respectively, first output of described bridge rectifier is by first inductance and the drain electrode that connects electronic switching tube of LED lamp of serial connection, the source electrode of described electronic switching tube connects second output of bridge rectifier, described first electric capacity is in parallel with described LED lamp, the anode of described diode connects the drain electrode of described electronic switching tube, and the negative electrode of described diode connects first output of described bridge rectifier;
Perhaps, described energy storage device is second inductance, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second inductance connect the output of described ballast respectively, the two ends of described second inductance also connect the input of described bridge rectifier respectively, the first output first via of described bridge rectifier connects the drain electrode of electronic switching tube by first inductance, the source electrode of described electronic switching tube connects second output of bridge rectifier, first output the second tunnel of described bridge rectifier connects the negative electrode of diode by first electric capacity, the first output Third Road of described bridge rectifier connects the negative electrode of diode by the LED lamp, and the anode of described diode connects the drain electrode of described electronic switching tube;
Perhaps, described energy storage device is second electric capacity, described driver module comprises first inductance, first electric capacity, diode, bridge rectifier and electronic switching tube, the two ends of described second electric capacity connect the output of described ballast respectively, the two ends of described second electric capacity also connect the input of described bridge rectifier respectively, the first output first via of described bridge rectifier connects the drain electrode of electronic switching tube by first inductance, the source electrode of described electronic switching tube connects second output of bridge rectifier, first output the second tunnel of described bridge rectifier connects the negative electrode of diode by first electric capacity, the first output Third Road of described bridge rectifier connects the negative electrode of diode by the LED lamp, and the anode of described diode connects the drain electrode of described electronic switching tube.
2. LED light fixture, described LED light fixture comprises a plurality of LED lamps, it is characterized in that, described LED light fixture also comprises as each described led drive circuit of claim 1.
3. LED illuminator, described LED illuminator comprises ballast, it is characterized in that, described LED illuminator also comprises and being connected with described ballast, LED light fixture as claimed in claim 2.
CN2009101090269A 2009-07-22 2009-07-22 Light emitting diode drive circuit, light emitting diode luminaire and light emitting diode lighting system Expired - Fee Related CN101965078B (en)

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CN2009101090269A CN101965078B (en) 2009-07-22 2009-07-22 Light emitting diode drive circuit, light emitting diode luminaire and light emitting diode lighting system

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US11876346B2 (en) 2019-06-26 2024-01-16 Analog Devices, Inc. Continuous wave laser driver with energy recycling

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CN103250467B (en) * 2011-12-02 2015-02-18 叶军 Led drive circuit and led drive chip
CN103874275A (en) * 2012-12-11 2014-06-18 李顺华 Driving power supply device for ballast LED (light emitting diode) lamp
CN103260311A (en) * 2013-05-21 2013-08-21 国家电网公司 Intelligent energy-saving power supply circuit for street lamp
CN103442474B (en) * 2013-09-13 2015-03-25 肖志龙 Energy-saving circuit without commercial power consumption
WO2016154845A1 (en) * 2015-03-30 2016-10-06 常州明石晶电科技有限公司 Led lamp tube and constant-current drive apparatus thereof
CN106163029A (en) * 2015-03-30 2016-11-23 常州明石晶电科技有限公司 A kind of LED lamp tube and constant current driving device thereof
CN105898958B (en) * 2015-08-05 2019-04-12 肖志军 The constant current driving method and circuit of LED light tunable optical
CN116398843B (en) * 2023-03-03 2024-01-23 上海东风照明器材有限公司 LED lighting system for centerline lamp of taxiway

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