CN102404921B - Output current adjustable intelligent constant current power supply device - Google Patents
Output current adjustable intelligent constant current power supply device Download PDFInfo
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- CN102404921B CN102404921B CN201110397478.9A CN201110397478A CN102404921B CN 102404921 B CN102404921 B CN 102404921B CN 201110397478 A CN201110397478 A CN 201110397478A CN 102404921 B CN102404921 B CN 102404921B
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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
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Abstract
The invention discloses an output current adjustable intelligent constant current power supply device which comprises a micro control unit (MCU) (3), a constant voltage module (8), a control module (5) and a signal detection module, wherein the MCU (3) can communicate with an upper computer (1), the constant voltage module (8) is arranged between an output end of mains supply and input ends of light emitting diode (LED) lamps (9); according to the series or parallel characteristics of the LED lamps (9), a constant current voltage is set on the upper computer (1) and is required to be output by the constant voltage module (8); the MCU (3) is used for comparing the constant current value with a feedback current value of the signal detection module and adjusting the duty ratio of a pulse width modulation (PWM) signal; and the control module (5) is used for regulating the output voltage of the constant voltage module (8) according to the received PWM signal so that the required constant output current is finally reached. The output current can be regulated within a wide range and can be flexibly applied to the LED lamps in multiple series or parallel connection modes; moreover, a control circuit of the constant voltage module is simple and practical.
Description
Technical field
But the present invention relates to the electric supply installation that the output current wide region is regulated, be specifically related to the adjustable Intelligent constant flow electric supply installation of output current.
Background technology
Along with going from strength to strength of LED industry, the use of LED has penetrated into the multiple fields such as LCD back lighting, indoor and outdoor lighting, portable lighting, automobile internal-external lighting and indication, the development of LED application has correspondingly driven the development of LED driver, but the output of LED constant-flow driver in the market is generally all more fixing, specific LED light fixture generally all needs to customize specific LED constant-flow driver, even have the part LED driver also half-power to export, but its adjustable range is also very limited.
Summary of the invention
The deficiency existed for prior art, the object of the invention is to provide and a kind ofly realizes that output current can be in relative broad range be regulated arbitrarily, output voltage is according to the self-reacting Intelligent constant flow electric supply installation of the string number of LED lamp, but flexible Application is in the LED of multiple string mode lamp.
To achieve these goals, the present invention realizes by the following technical solutions:
The present invention includes and can and the MCU that communicates of host computer, be arranged on constant voltage module, control module and signal detection module between civil power output and LED lamp input; Set the constant current value that needs the output of constant voltage module on host computer according to the series and parallel feature of LED lamp, MCU compares the feedback current value of constant current value and signal detection module, regulate the duty ratio of pwm signal, control module, according to the output voltage of the pwm signal regulating constant die block received, reaches required constant output current.The output current of apparatus of the present invention can be regulated arbitrarily in relative broad range.
Above-mentioned constant voltage module comprises output feedback control circuit and PWM controller, the output of output feedback control circuit is connected with the PWM controller, the first input end of output feedback control circuit is connected with the output of control module, the second input of output feedback control circuit is connected with the voltage output end of constant voltage module, and the LED lamp is connected with the voltage output end of constant voltage module.
Above-mentioned control module comprises a NPN triode, the first electric capacity, the first diode and the second diode be connected with the MCU output by the first resistance; The collector electrode of the one NPN triode is connected with the common port of the first diode with the first electric capacity by the second resistance; The equal ground connection of anode of one utmost point of the emitter of the one NPN triode, the first electric capacity and the first diode; The negative electrode of the second diode connects the common port of the first electric capacity and the first diode, and the anode of the second diode connects the first input end of output feedback control circuit.Control module circuit of the present invention is simple.
Be provided with rectification filtering module and the PFC correction module be connected with the rectification filtering module output between above-mentioned civil power and constant voltage module.
The input of above-mentioned MCU also is connected with temperature detecting module.
Above-mentioned signal detection module comprises current detection module and voltage detection module, the input of current detection module and voltage detection module is connected with the corresponding interface of constant voltage module, and the output of current detection module and voltage detection module is connected with the corresponding interface of MCU.
Above-mentioned MCU communicates by wireless communication module or infrared communication module and host computer.
Output current of the present invention can be regulated arbitrarily in relative broad range, but flexible Application is in the LED of multiple string mode lamp; Simple and practical to the control circuit of constant voltage module in the present invention.
The accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 is control module circuit diagram of the present invention;
Fig. 3 is the output feedback control circuit figure in constant voltage module of the present invention.
Each label in figure: host computer 1, communication module 2, MCU3, temperature detecting module 4, control module 5, current detection module 6, voltage detection module 7, constant voltage module 8, LED lamp 9, PFC correction module 10, rectification filtering module 11.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
Referring to Fig. 1, the present invention includes and can and the MCU3 that communicates of host computer 1, be arranged on constant voltage module 8 between civil power and LED lamp 9, be connected on rectification filtering module 11 and PFC correction module 10, control module 5, temperature detecting module 4 and the signal detection module between civil power output and constant voltage module 8 inputs successively.Host computer 1 can be set the current value that needs the output of this electric supply installation neatly according to the connection in series-parallel feature of different LED lamp 9.Wherein, host computer 1, MCU3, temperature detecting module 4, LED lamp 9, PFC correction module 10, rectification filtering module 11 are prior art, repeat no more herein.
The input of control module 5 is connected with the output of MCU3, and the output of control module 5 is connected with the input of constant voltage module 8.
The output of temperature detecting module 4 is connected with the input of MCU3.Temperature detecting module 4 can detect the internal temperature of this device at any time, and when temperature being detected when higher, MCU3 can initiatively reduce output current according to temperature, with the bulk temperature of controlling this device the scope that can bear; If, in the situation that initiatively reduce output current, temperature still raises, while reaching certain limiting value, MCU3 controls constant voltage module 8, turn-offs output, enters the idle protection state, to protect this device and LED lamp 9 not damaged.
Signal detection module comprises current detection module 6 and voltage detection module 7, the input of current detection module 6 and voltage detection module 7 is connected with the output of constant voltage module 8, and the output of current detection module 6 and voltage detection module 7 is connected with the input of MCU3.Current detection module 6 and voltage detection module 7 repeat no more for prior art herein.
MCU3 communicates by wireless communication module or infrared communication module and host computer 1.Communication module 2 adopts wireless communication mode, while making this electric supply installation and host computer 1 carry out communication, without physical connection, is convenient to the processing of electric supply installation waterproof measure.The wireless communication mode that communication module 2 adopts realizes by the infrared communication mode, and it is simple that the infrared communication mode has a circuit, the characteristics that cost is low.
Referring to Fig. 2 and Fig. 3, constant voltage module 8 comprises output feedback control circuit and PWM controller, the first input end CTRL_IN of output feedback control circuit is connected with control module 5 outputs, the second input OUT+ of output feedback control circuit is connected with LED lamp 9 inputs (being the voltage output end of constant voltage module 8), and the output FB of output feedback control circuit is connected with the PWM controller.Constant voltage module 8 is the prior art module, repeats no more herein.
Referring to Fig. 2, control module 5 is an integrating circuit, comprises the NPN triode Q6, the first capacitor C 39, the first diode D14 and the second diode D16 that are connected with the MCU3 output; The collector electrode of the one NPN triode Q6 is connected with the common port of the first diode D14 with the first capacitor C 39; The equal ground connection of anode of one utmost point of the emitter of the one NPN triode Q6, the first capacitor C 39 and the first diode D14; The negative electrode of the second diode D16 connects the common port of the first capacitor C 39 and the first diode D14, and the anode of the second diode D16 connects the first input end of output feedback control circuit.Base stage at a NPN triode Q6 is provided with the first resistance R 65, at the collector electrode of a NPN triode Q6 and the common port of the first capacitor C 39 and the first diode D14, is provided with the second resistance R 59.Pwm signal is input to control module 5 from the PWM_IN end.
Referring to Fig. 3, the CTRL_OUT end is connected with the CTRL_IN of output feedback control circuit, and the OUT+ end is connected with the anode of constant voltage module 8 outputs, and the FB end is connected with the feedback end of PWM controller.Wherein: D15 is three end adjustable shunt reference sources, U6 is photoelectrical coupler, by changing the duty ratio of pwm signal, change the CTRL_IN terminal voltage, when the 1 pin voltage of D15 changes, the electric current that the D15 internal regulation flows through 2,3 pin is constant with the reference voltage that maintains 1 pin, and the electric current now flow through between 1,2 pin of U6 also can change, thereby change the voltage of FB pin, and then change the output voltage of constant voltage module 8.
Before using this device, according to the series and parallel feature of load LED lamp 9, at host computer 1, set the constant current value that needs the output of this electric supply installation, through communication module, pass to MCU3 2 times, MCU3 receives and stores the constant current value that host computer passes for 1 time.After system powers on, MCU3 controls constant voltage module 8 and exports with minimum voltage, by detecting its output current (feedback current value), with constant current value, compare, adopt pid algorithm if unequal, duty by regulating pwm signal is the output voltage of regulating constant die block 8 recently, until output current equates with constant current value, the constant current that realizes output with this is controlled.
Above demonstration and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. the adjustable Intelligent constant flow electric supply installation of output current, is characterized in that,
Comprise can and the MCU(3 that communicates of host computer (1)), be arranged on constant voltage module (8), control module (5) and signal detection module between civil power output and LED lamp (9) input;
Need the constant current value of constant voltage module (8) output in the upper setting of host computer (1) according to the series and parallel feature of described LED lamp (9), described MCU(3) the feedback current value of constant current value and signal detection module is compared, regulate the duty ratio of pwm signal, described control module (5), according to the output voltage of the pwm signal regulating constant die block (8) received, finally reaches required constant output current;
Described constant voltage module (8) comprises output feedback control circuit and PWM controller, the output of described output feedback control circuit is connected with the PWM controller, the first input end of described output feedback control circuit is connected with the output of control module (5), the second input of output feedback control circuit is connected with the voltage output end of constant voltage module (8), and described LED lamp (9) is connected with the voltage output end of constant voltage module (8);
Described control module (5) comprises by the first resistance and MCU(3) output the NPN triode, the first electric capacity, the first diode and the second diode that are connected;
The collector electrode of a described NPN triode is connected with the common port of the first diode with the first electric capacity by the second resistance;
The equal ground connection of anode of one utmost point of the emitter of a described NPN triode, the first electric capacity and the first diode;
The negative electrode of described the second diode connects the common port of the first electric capacity and the first diode, and the anode of the second diode connects the first input end of output feedback control circuit;
Be provided with rectification filtering module (11) and the PFC correction module (10) be connected with rectification filtering module (11) output between described civil power and constant voltage module (8);
At described MCU(3) input also be connected with temperature detecting module (4);
Described signal detection module comprises current detection module (6) and voltage detection module (7), the input of described current detection module (6) and voltage detection module (7) is connected with the corresponding interface of constant voltage module (8), the output and MCU(3 of current detection module (6) and voltage detection module (7)) the corresponding interface be connected.
2. the adjustable Intelligent constant flow electric supply installation of output current according to claim 1, is characterized in that,
Described MCU(3) by wireless communication module or infrared communication module and host computer (1), communicate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110397478.9A CN102404921B (en) | 2011-12-03 | 2011-12-03 | Output current adjustable intelligent constant current power supply device |
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| CN201110397478.9A CN102404921B (en) | 2011-12-03 | 2011-12-03 | Output current adjustable intelligent constant current power supply device |
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| CN102404921A CN102404921A (en) | 2012-04-04 |
| CN102404921B true CN102404921B (en) | 2014-01-01 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102695334A (en) * | 2012-05-11 | 2012-09-26 | 华南理工大学 | Intelligent light modulation apparatus for LED concentrated direct current power supply system |
| CN102769981B (en) * | 2012-07-30 | 2014-10-15 | 西北工业大学 | Intelligent constant-current driver realized by embedded chip and control method of intelligent constant-current driver |
| CN105992431A (en) * | 2015-02-05 | 2016-10-05 | 佛山市禾才科技服务有限公司 | Control circuit and control method of controlling illumination of LED lamp |
| CN108525072A (en) * | 2015-06-10 | 2018-09-14 | 安溪县海宏生物科技有限公司 | A kind of transfusion monitoring device |
| CN106102221B (en) * | 2016-06-16 | 2017-10-03 | 厦门印天电子科技有限公司 | A kind of LED light adjusting circuits |
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| CN102131334A (en) * | 2011-04-15 | 2011-07-20 | 苏州市纽克斯照明有限公司 | System and method for controlling lighting current of electronic ballast |
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| US20070247087A1 (en) * | 2006-04-21 | 2007-10-25 | Marketing Displays Inc. | Lamp power supply and protection circuit |
| CN102005918A (en) * | 2010-11-12 | 2011-04-06 | 深圳市京泉华电子有限公司 | Synchronous boost-buck device and synchronous buck-buck method thereof |
| CN101977475A (en) * | 2010-11-17 | 2011-02-16 | 湘潭大学 | LED constant current control device in PWM dimming mode |
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