CN103547032B - A kind of LED lamp based on thyristor constant current - Google Patents
A kind of LED lamp based on thyristor constant current Download PDFInfo
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- CN103547032B CN103547032B CN201310495970.9A CN201310495970A CN103547032B CN 103547032 B CN103547032 B CN 103547032B CN 201310495970 A CN201310495970 A CN 201310495970A CN 103547032 B CN103547032 B CN 103547032B
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- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000036772 blood pressure Effects 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 42
- 229910052710 silicon Inorganic materials 0.000 claims description 42
- 239000010703 silicon Substances 0.000 claims description 42
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 claims description 2
- 230000009125 negative feedback regulation Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract description 3
- 230000005669 field effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention discloses a kind of LED lamp based on thyristor constant current, rectification circuit uses bridge-type half-wave rectifying circuit, LED string carries out blood pressure lowering to the voltage after rectification, current detection circuit detects the electric current of LED string and microcontroller is formed negative feedback, microprocessor controls thyristor operating angle regulates electric current, and then realizes circuit constant current.The circuit of the present invention exempts from electrochemical capacitor, transformator, field effect transistor or transistor driving, and circuit is simple, dependable performance, cost are relatively low, volume is little, heating less, good stability.
Description
Technical field
The present invention relates to a kind of LED lamp, a kind of LED lamp based on thyristor constant current.
Background technology
At present, along with the popularization that is propagated further of energy-conserving and environment-protective theory, LED illumination technology fast development, in order to accelerate the universal of LED fluorescent lamp tube and LED down, commercial market needs the LED lamp that circuit is simple, dependable performance, price are relatively low badly.The power supply of major part LED lamp uses PWM constant current source at present, its circuit is made up of rectifying and wave-filtering, PWM integrated circuit, transformator, power tube driving etc., this structural circuit is complicated, production cost is high, simultaneously because rectified voltage is high, electrolytic capacitor filter and power tube is caused to be easily damaged, poor reliability.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to provide the LED lamp that a kind of circuit is simple, dependable performance, price are relatively low.
The present invention solves its problem and be the technical scheme is that
A kind of LED lamp based on thyristor constant current, including:
Rectification circuit, for carrying out rectification to the alternating current of input；
LED string, described LED series winding connects the outfan of rectification circuit；
Also include:
Controllable silicon current regulating circuit, for regulating loop electric current, after described controllable silicon current regulating circuit is serially connected in LED string；
Current detection circuit, for measure loop size of current, described current detection circuit is serially connected in controllable silicon current regulating circuit rear；
Microcontroller, for being controlled controllable silicon current regulating circuit, the input of described microcontroller connects current detection circuit, and outfan connects controllable silicon current regulating circuit.
As the further improvement of technical solution of the present invention, also include:
Power supply circuits, for powering for microcontroller, described power supply circuits input connects LED string, and outfan connects microcontroller；
Zero cross detection circuit, matches with power supply circuits for providing zero passage detection voltage for microcontroller, makes microcontroller Tong Bu with alternating-current power supply, and described zero cross detection circuit input connects rectification circuit, and outfan connects microcontroller.
Preferably, described rectification circuit is bridge-type half-wave rectifying circuit.
Preferably, described microcontroller is the single-chip microcomputer being built-in with analog-digital conversion function.
Preferably, described controllable silicon current regulating circuit includes that controllable silicon, described controllable silicon are one-way SCR or bidirectional triode thyristor.
Further, also include that additional functional circuits, described additional functional circuits are connected with microcontroller.
The invention has the beneficial effects as follows: a kind of based on thyristor constant current the LED lamp that the present invention uses, rectification circuit uses bridge-type half-wave rectifying circuit, LED string carries out blood pressure lowering to the voltage after rectification, current detection circuit detects the electric current of LED string and microcontroller is formed negative feedback, microprocessor controls thyristor operating angle regulates electric current, and then realizes circuit constant current.The circuit of the present invention exempts from electrochemical capacitor, transformator, field effect transistor or transistor driving, and circuit is simple, dependable performance, cost are relatively low, volume is little, heating less, good stability.
Accompanying drawing explanation
The invention will be further described with example below in conjunction with the accompanying drawings.
Fig. 1 be a kind of LED lamp microcontroller based on thyristor constant current of the present invention independently-powered time circuit module figure；
Fig. 2 is a kind of LED lamp microcontroller based on thyristor constant current of present invention circuit module figure when major loop power taking；
Fig. 3 is the circuit theory diagrams of a kind of LED lamp based on thyristor constant current of the present invention；
Fig. 4 is the circuit module figure of a kind of another embodiment of LED lamp based on thyristor constant current of the present invention.
Detailed description of the invention
With reference to Fig. 1 and Fig. 3, a kind of based on thyristor constant current the LED lamp of the present invention, including major loop and negative feedback loop, include successively along major loop: rectification circuit 1, LED string 2 and controllable silicon current regulating circuit 3；Described rectification circuit 1, preferably by bridge-type halfwave rectifier, including four diodes, the described direct power taking rectification from 220V alternating current of rectification circuit 1, and exports to LED string 2；Described LED string 2 carries out blood pressure lowering to rectified alternating current, and the blood pressure lowering value of LED string 2 determines to allow minimum supply voltage, less than not reaching predetermined power during permissible value；Alternating current exports to controllable silicon current regulating circuit 3 after LED string 2 blood pressure lowering.
Also include along negative feedback loop: current detection circuit 4 and microcontroller 5；Described current detection circuit 4 is for providing the feedback information on main circuit loop for microcontroller 5, and this feedback information is reflected by the voltage on the resistance R4 in current detection circuit 4, and resistance R4 concatenates with controllable silicon current regulating circuit 3；Described microcontroller 5 preferably employs the single-chip microcomputer with analog-digital conversion function, the input of microcontroller 5 receives the voltage feedback information from current detection circuit 4, outfan controls controllable silicon current regulating circuit 3, feedback information is through microcontroller 5 analog digital conversion, and calculate the regulated quantity of controllable silicon electric current in controllable silicon current regulating circuit 3 according to the calculation being previously set, and then control controllable silicon current regulating circuit 3.
Major loop matches with negative feedback loop the electric current constant current made on major loop.Controllable silicon current regulating circuit 3 includes controllable silicon and R5, the preferably unidirectional controllable silicon of controllable silicon or bidirectional triode thyristor；LED string 2 connects controllable silicon A foot, microcontroller 5 output pin connects controllable silicon G foot through resistance R5, when microcontroller 5 exports pulse, controlled silicon conducting, LED string 2 are connected, and controllable silicon K foot is connected with the resistance R4 in current detection circuit 4, reconnect microcontroller 5 analog digital conversion input interface, microcontroller 5 detects resistance R4 both end voltage by analog digital conversion, calculate electric current, and LED string 2 electric current is carried out negative-feedback regu-lation, and then make the current constant of LED string 2.
With reference to Fig. 2 and Fig. 3, microcontroller 5 can be independently-powered, it is also possible to directly power taking from major loop.At microcontroller 5 from major loop in the case of power taking, the circuit of the present invention also includes: power supply circuits 6 and zero cross detection circuit 7.Described power supply circuits 6 input is connected with LED string 2, outfan is connected with microcontroller 5, power supply circuits 6 include resistance R3, diode D2, stabilivolt D3 and electric capacity C1, alternating current after LED string 2 blood pressure lowering through resistance R3 current limliting blood pressure lowering, electric current charges to electric capacity C1 through diode D2, and stabilivolt D3 voltage stabilizing supplies electricity to microcontroller 5；Owing to microcontroller 5 is by LED string 2 load supplying, controllable silicon can not be powered to microcontroller 5 after opening, so needing microcontroller 5 each cycle to retain the charging interval, ensure meet during electric capacity C1 electric discharge the operation electrical energy demands in microcontroller 5 each cycle, the most here zero cross detection circuit 7 has been introduced, described zero cross detection circuit 7 matches with power supply circuits 6, zero passage detection voltage is provided for microcontroller 5, zero cross detection circuit 7 input is connected with rectification circuit 1, outfan is connected with microcontroller 5, described zero cross detection circuit 7 includes resistance R1 and resistance R2, resistance R1 blood pressure lowering provides zero passage detection voltage for microcontroller 53.Microcontroller 5 is Tong Bu with input AC electricity by zero passage detection, calculate the input cycle time of each alternating current, and then control each alternating current input service time in cycle length (i.e. thyristor operating angle), make microcontroller 5 can pass through power supply circuits 6 power taking from major loop, be unlikely to circuit malfunction simultaneously.
With reference to Fig. 4, as an alternative embodiment of the invention, microcontroller 5 is also associated with additional functional circuits 8, and additional functional circuits 8 has acoustic control and postpones inducing function and human body sensing delay function, correspondingly, additional functional circuits 8 includes that acoustic control postpones induction installation and human body sensing time-delay mechanism.The electric current of controllable silicon current regulating circuit 3 can be adjusted by microcontroller 5 according to the regulation signal of induction installation transmission, and then is adjusted the luminosity of LED string 2, it is achieved the effect of light modulation.
The above, simply presently preferred embodiments of the present invention, the invention is not limited in above-mentioned embodiment, as long as it reaches the technique effect of the present invention with identical means, all should belong to protection scope of the present invention.
Claims (5)
1. a LED lamp based on thyristor constant current, including:
Rectification circuit (1), for carrying out rectification to the alternating current of input；
LED string (2), described LED string (2) connects the outfan of rectification circuit (1)；
It is characterized in that, also include:
Controllable silicon current regulating circuit (3), for regulating loop electric current, after described controllable silicon current regulating circuit (3) is serially connected in LED string (2)；
Current detection circuit (4), for measure loop size of current, described current detection circuit (4) is serially connected in controllable silicon current regulating circuit (3) rear；
Microcontroller (5), for being controlled controllable silicon current regulating circuit (3), the input of described microcontroller (5) connects current detection circuit (4), and outfan connects controllable silicon current regulating circuit (3)；
Controllable silicon current regulating circuit (3) includes controllable silicon and resistance R5, LED string (2) connects controllable silicon A foot, microcontroller (5) output pin connects controllable silicon G foot through resistance R5, when microcontroller (5) output pulse, controlled silicon conducting, LED string (2) is connected, controllable silicon K foot is connected with the resistance R4 in current detection circuit (4), reconnect microcontroller (5) analog digital conversion input interface, microcontroller (5) detects resistance R4 both end voltage by analog digital conversion, calculate the regulated quantity of controllable silicon electric current in controllable silicon current regulating circuit (3), and then control controllable silicon current regulating circuit (3), LED string (2) electric current is carried out negative-feedback regu-lation, and then make the current constant of LED string (2)；
Power supply circuits (6), for powering for microcontroller (5), described power supply circuits (6) input connects LED string (2), and outfan connects microcontroller (5)；
Zero cross detection circuit (7), match for providing zero passage detection voltage for microcontroller (5) with power supply circuits (6), make microcontroller (5) Tong Bu with alternating-current power supply, described zero cross detection circuit (7) input connects rectification circuit (1), outfan connects microcontroller (5), described zero cross detection circuit (7) includes resistance R1 and resistance R2, resistance R1 blood pressure lowering is that microcontroller (5) provides zero passage detection voltage, microcontroller (5) is Tong Bu with input AC electricity by zero passage detection, calculate the input cycle time of each alternating current, and then control each alternating current input service time in cycle length, make microcontroller (5) that power supply circuits (6) power taking from major loop can be passed through, it is unlikely to circuit malfunction simultaneously.
A kind of LED lamp based on thyristor constant current the most according to claim 1, it is characterised in that: described rectification circuit (1) is bridge-type half-wave rectifying circuit (1).
A kind of LED lamp based on thyristor constant current the most according to claim 1, it is characterised in that: described microcontroller (5) is the single-chip microcomputer being built-in with analog-digital conversion function.
A kind of LED lamp based on thyristor constant current the most according to claim 1, it is characterised in that: described controllable silicon current regulating circuit (3) includes that controllable silicon, described controllable silicon are one-way SCR or bidirectional triode thyristor.
A kind of LED lamp based on thyristor constant current the most according to claim 1, it is characterised in that: also include that additional functional circuits (8), described additional functional circuits (8) are connected with microcontroller (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310495970.9A CN103547032B (en) | 2013-10-21 | 2013-10-21 | A kind of LED lamp based on thyristor constant current |
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| CN201310495970.9A CN103547032B (en) | 2013-10-21 | 2013-10-21 | A kind of LED lamp based on thyristor constant current |
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| CN103547032A CN103547032A (en) | 2014-01-29 |
| CN103547032B true CN103547032B (en) | 2016-10-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108040403B (en) * | 2017-10-30 | 2019-05-31 | 厦门亚锝电子科技有限公司 | Light modulator |
| CN111405715A (en) * | 2020-04-03 | 2020-07-10 | 宁波科尔维特照明有限公司 | Silicon controlled rectifier dimming system and dimming method thereof |
| CN112911766A (en) * | 2021-01-25 | 2021-06-04 | 璞洛泰珂(上海)智能科技有限公司 | Chopper type constant current light modulator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2922367Y (en) * | 2006-07-07 | 2007-07-11 | 陈汉湘 | Outdoor headlamp intelligent light time controller |
| CN201194438Y (en) * | 2008-04-08 | 2009-02-11 | 深圳和而泰智能控制股份有限公司 | Fixed power limiter and lighting lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101102630B (en) * | 2006-07-07 | 2011-07-27 | 陈汉湘 | Intelligent light time controller and control method for outdoor spotlight |
| CN101257757B (en) * | 2008-04-08 | 2011-01-19 | 深圳和而泰智能控制股份有限公司 | Fixed power limiter and lighting lamp |
| CN101309529B (en) * | 2008-06-27 | 2010-11-17 | 武汉理工大学 | Intelligent control apparatus and method for high-power energy saving electromagnetic stove |
| CN201590942U (en) * | 2009-11-25 | 2010-09-22 | 中国电子科技集团公司第五十二研究所 | Electronic ballast of FM (frequency modulation) light-dimming fluorescent lamp |
| CN202150960U (en) * | 2011-06-09 | 2012-02-22 | 徐州市凯越电子科技有限公司 | Load self-adapting medium-frequency electromagnetic induction heating energy-saving device |
| CN102438365B (en) * | 2011-10-20 | 2014-02-05 | 常州大学 | Program-controlled SCR (silicon controlled rectifier) high-power LED (light-emitting diode) high-efficiency power supply circuit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2922367Y (en) * | 2006-07-07 | 2007-07-11 | 陈汉湘 | Outdoor headlamp intelligent light time controller |
| CN201194438Y (en) * | 2008-04-08 | 2009-02-11 | 深圳和而泰智能控制股份有限公司 | Fixed power limiter and lighting lamp |
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Owner name: HUIGAO (GUANGZHOU) ELECTRONICS CO., LTD. Free format text: FORMER OWNER: JIANGMEN LIANGDA LIGHTING CO., LTD. Effective date: 20141121 |
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Effective date of registration: 20141121 Address after: Whampoa Kaitai Avenue Ruitailu District of Guangzhou City, Guangdong Province, No. 2 510700 Applicant after: High (Guangzhou) Electronics Co., Ltd. Address before: The vast Industrial Park No. 6 529000 Guangdong province Jiangmen Jianghai Keyuan Road 5 Building 2 layer 201 Applicant before: Jiangmen city Liang great Lighting Co., Ltd |
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Effective date of registration: 20170117 Address after: 510635 Guangdong Province, Guangzhou high tech Industrial Development Zone Ruitailu No. 2 No. 102 Patentee after: GUANGZHOU WIN NEWS TECHNOLOGY CO., LTD. Address before: Whampoa Kaitai Avenue Ruitailu District of Guangzhou City, Guangdong Province, No. 2 510700 Patentee before: High (Guangzhou) Electronics Co., Ltd. |
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