CN105792481A - Constant current controller capable of automatically detecting maximal working current of light source and detection method thereof - Google Patents
Constant current controller capable of automatically detecting maximal working current of light source and detection method thereof Download PDFInfo
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- CN105792481A CN105792481A CN201610243362.2A CN201610243362A CN105792481A CN 105792481 A CN105792481 A CN 105792481A CN 201610243362 A CN201610243362 A CN 201610243362A CN 105792481 A CN105792481 A CN 105792481A
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- current
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
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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
Abstract
The invention belongs to the technical field of electric light sources, and specifically relates to a constant current controller capable of automatically detecting maximal working current of a light source. The constant current controller comprises a master control module, a voltage detection module, a current detection module, a constant current control module and a display module, wherein the master control module is electrically connected with the voltage detection module, the current detection module, the constant current control module and the display module, the voltage detection module and the constant current control module are electrically connected with the light source load to be detected to allow the master control module, the voltage detection module, the constant current control module and the light source load form a loop, and the display module is electrically connected with the master control module to display set voltage. The invention further discloses a detection method for the constant current controller capable of automatically detecting maximal working current of a light source.
Description
Technical field
The invention belongs to electric energy light sources technical field, be specifically related to automatically detect constant-current controller and the detection method thereof of light source maximum operating currenbt.
Background technology
Nowadays, whether general illumination field or signal designation field, the extensive use of electric energy light source.Existing light source can be divided into constant-voltage driving power source and constant-current driving power supply according to its power supply feature, and both power supplys are very general in actual applications.When adopting constant-voltage driving power source, in the work of light source, along with continuing of working time, components and parts heating, resistance become big or diminish, and electric current will change up and down, cause the brightness instability of light source and affect the life-span of light fixture；According to constant-current driving power supply, electric current will not change, thus ensure that the stability of light-source brightness and can improving the service life of light fixture, so that the life-span of whole lamp and stability is better.
But existing light source generally only indicates rated voltage, the power supply of light source is not identified clearly, and quite a few light source is to adopt constant current source to drive at present, if the maximum operating currenbt of light source is unclear, then cannot learn that needing to adopt great driving electric current is light source power supply, if driving electric current too low, then light source can be caused to be difficult to play higher efficiency；If driving electric current too high, then it is the service life that can have a strong impact on light source, causes light source to scrap in advance.
The maximum operating currenbt of light source is light source electric current of normal operation under rated voltage, intensity adjustable light source, and it drives the output electric current of power supply not can exceed that this maximum operating currenbt.Needing to regulate the occasion of light-source brightness, if not knowing the maximum operating currenbt of light source, then can affect the scope that light-source brightness regulates, careless slightly, will also result in electric current too high and damage light source.Therefore, for guaranteeing stability and the service life of light source, it is necessary to be controlled driving electric current.
Summary of the invention
An object of the present invention is in that: for the deficiencies in the prior art, it is provided that the constant-current controller of a kind of automatic detection light source maximum operating currenbt, can automatically detect the maximum operating currenbt of light source load.
To achieve these goals, the present invention adopts the following technical scheme that
Automatically the constant-current controller of light source maximum operating currenbt is detected, including main control module, voltage detection module, current detection module, constant-current control module and display module, described main control module electrically connects with described voltage detection module, current detection module, constant-current control module and display module, described voltage detection module and described constant-current control module can electrically connect with light source load to be measured, so that described main control module, voltage detection module, constant-current control module and light source load form loop.Described display module electrically connects with main control module, the magnitude of voltage that display sets.
Described main control module includes micro-control unit (MCU), the voltage and current of light source load is detected in real time simultaneously.When connecting different light sources, the electric current of described constant-current control module output starts to be gradually increased from 0, and real time operation voltage signal and the real time operation current signal of detection are fed back to described main control module by described voltage detection module and described current detection module；When the real time operation magnitude of voltage that described voltage detection module is fed back is equal with the rated voltage of detected light source load, described main control module sends control signal to described constant-current control module, the electric current that described constant-current control module exports is made to stop increasing, it is to avoid electric current is excessive, damages light source.Meanwhile, this maximum current is set up corresponding mapping relations by described main control module with the rated voltage of light source load in micro-control unit, and by this mapping relations record in a control unit.Hereafter, according to brightness needs, when the magnitude of voltage of this light source load changes, can automatically on above-mentioned maximum current basis by the output electric current of light source load, according to mapping relations, proportional change (as the 1/2 of rated voltage, then electric current is adjusted to the 1/2 of maximum current to the voltage such as set automatically), and exported and keep current current value by constant-current control module described in described master control module controls.
Described voltage detection module also includes the A/D current conversion module and the voltage detection circuit that are sequentially connected in series, and described voltage detection circuit is connected with light source load, the voltage of Real-time Feedback light source load.
Described constant-current control module also includes the D/A current conversion module, current constant control loop and the current regulation loop that are sequentially connected in series, and described current regulation loop is connected with light source load, controls the maximum current of light source load in real time.
Described current detection module also includes the A/D current conversion module, current detection circuit and the current sampling circuit that are sequentially connected in series, and described current sampling circuit is connected with the current regulation loop of described constant-current control module, the electric current of Real-time Feedback light source load.
The two of the purpose of the present invention are in that: also provide for automatically detecting the detection method of the constant-current controller of light source maximum operating currenbt, comprise the following steps:
1) described voltage detection module and described constant-current control module are electrically connected with light source load to be measured, so that described main control module, voltage detection module, constant-current control module and light source load form loop；
2) described main control module sends current controling signal to described constant-current control module, the electric current that described constant-current control module exports is made to start to promote gradually from 0, the detection when running voltage of light source load and operating current are put into effect by described voltage detection module and described current detection module；
3) real time operation voltage signal and the real time operation current signal of detection are fed back to described main control module by described voltage detection module and described current detection module；
4) when the real time operation magnitude of voltage that described voltage detection module is fed back is equal with the rated voltage of tested light source load, described main control module sends current controling signal to described constant-current control module, the electric current that described constant-current control module exports is made to stop increasing, and keep the current value of current output, the operating current that described current detection module detects light source load current feeds back to described main control module, the current value currently exported by described constant-current control module is as the maximum operating currenbt of tested light source load, and this maximum operating currenbt and rated voltage are set up mapping relations；
5) when user adjusts the brightness of light source as required, set different voltage, can be changed automatically according to mapping relations by the output electric current of light source load, exported and keep current current value by constant-current control module described in described master control module controls.
The beneficial effects of the present invention is: the constant-current controller and detection method thereof that automatically detect light source maximum operating currenbt are provided, by being gradually increased the output electric current of described constant-current control module, and coordinate the real-time detection of described voltage detection module and described current detection module, automatically and precisely obtain the maximum operating currenbt of light source load under rated voltage, and while obtaining the maximum operating currenbt of light source load, current output current value is kept by constant-current control module described in described master control module controls, the described permanent output electric current continuation increase controlling module is avoided to affect the service life of light source load, even burn out light source load.
Further, this constant-current controller can according to the needs of brightness adjustment, when the change in voltage set, the output electric current of light source load can be changed according to mapping relations automatically, exported and keep current current value by constant-current control module described in described master control module controls.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the constant-current controller of automatic detection light source maximum operating currenbt of the present invention.
Detailed description of the invention
Below in conjunction with detailed description of the invention and Figure of description, the present invention and beneficial effect thereof are described in further detail, but, the specific embodiment of the present invention is not limited thereto.
As shown in Figure 1, automatically the constant-current controller of light source maximum operating currenbt is detected, including main control module, voltage detection module, current detection module, constant-current control module and display module, described main control module and described voltage detection module, current detection module and constant-current control module electrical connection, described voltage detection module and described constant-current control module can electrically connect with light source load to be measured, so that described main control module, voltage detection module, constant-current control module and light source load form loop, described voltage detection module includes voltage detection circuit, described constant-current control module includes current constant control loop and current regulation loop, described current detection module includes current detection circuit and current sampling circuit, described current regulation loop and the electrical connection of described current sampling circuit.Wherein, described main control module includes micro-control unit (MCU), and described voltage detection module also includes A/D current conversion module, and described current detection module also includes A/D current conversion module, and described constant-current control module also includes D/A current conversion module.Described display module electrically connects with main control module, the magnitude of voltage that display sets.
In actual applications, the detection method of the described constant-current controller automatically detecting light source maximum operating currenbt, comprise the following steps:
1) described voltage detection module and described constant-current control module are electrically connected with light source load to be measured, so that described main control module, voltage detection module, constant-current control module and light source load form loop, wherein said voltage detection module is connected with the positive pole of described light source load, and described constant-current control module is connected with the negative pole of described light source load；
2) described main control module sends current controling signal to described constant-current control module, the D/A current conversion module of described constant-current control module is converted current controling signal to exchange by direct current, and it is sent to described current constant control loop, the electric current that the current regulation loop of described constant-current control module exports to described light source load is made to start to promote gradually from 0, the detection when running voltage of light source load and operating current are put into effect by described voltage detection module and described current detection module；
3) described voltage detection module and described current detection module by A/D current conversion module by the real time operation voltage signal of detection and real time operation current signal by after exchanging and converting direct current to, then feed back to described main control module；
4) when the real time operation magnitude of voltage that described voltage detection module is fed back is equal with the rated voltage of tested light source load, described main control module sends current controling signal to described constant-current control module, the electric current that described constant-current control module exports is made to stop increasing, and keep the current value of current output, the operating current that described current detection module detects light source load current feeds back to described main control module, and the current value currently exported by described constant-current control module is as the maximum operating currenbt of tested light source load, and this maximum current and rated voltage are set up mapping relations；
5) when user sets different voltage, can be changed according to mapping relations automatically by the output electric current of light source load, be exported and keep current current value by constant-current control module described in described master control module controls.
The constant-current controller automatically detecting light source maximum operating currenbt described in the present embodiment, by being gradually increased the output electric current of described constant-current control module, and coordinate the real-time detection of described voltage detection module and described current detection module, automatically and precisely obtain the maximum operating currenbt of light source load under rated voltage, set up the mapping relations of maximum current and rated voltage, and while obtaining the maximum operating currenbt of light source load, current output current value is kept by constant-current control module described in described master control module controls, the exporting the continuing to increase of electric current of described constant-current control module is avoided to affect the service life of light source load, even burn out light source load.
The announcement of book and instruction according to the above description, above-mentioned embodiment can also be modified and revise by those skilled in the art in the invention.Therefore, the invention is not limited in above-mentioned detailed description of the invention, any conspicuously improved, replacement or modification that every those skilled in the art are done on the basis of the present invention belong to protection scope of the present invention.Although additionally, employ some specific terms in this specification, but these terms are intended merely to convenient explanation, and the present invention does not constitute any restriction.
Claims (2)
1. automatically detect the constant-current controller of light source maximum operating currenbt, it is characterised in that:
Including main control module, voltage detection module, current detection module, constant-current control module and display module, described main control module electrically connects with described voltage detection module, current detection module, constant-current control module and display module, described voltage detection module and described constant-current control module can electrically connect with light source load to be measured, so that described main control module, voltage detection module, constant-current control module and light source load form loop, described display module electrically connects with main control module, the magnitude of voltage that display sets；
Described main control module includes micro-control unit, the voltage and current of light source load is detected in real time simultaneously, when connecting different light sources, the electric current of described constant-current control module output starts to be gradually increased from 0, and real time operation voltage signal and the real time operation current signal of detection are fed back to described main control module by described voltage detection module and described current detection module；When the real time operation magnitude of voltage that described voltage detection module is fed back is equal with the rated voltage of detected light source load, described main control module sends control signal to described constant-current control module, the electric current that described constant-current control module exports is made to stop increasing, meanwhile, this maximum current is set up corresponding mapping relations with the rated voltage of light source load by described main control module in micro-control unit, and by this mapping relations record in a control unit, hereafter, according to brightness needs, when the magnitude of voltage of this light source load changes, can automatically on above-mentioned maximum current basis by the output electric current of light source load, according to mapping relations, proportional change, and exported and keep current current value by constant-current control module described in described master control module controls；
Described voltage detection module also includes the A/D current conversion module and the voltage detection circuit that are sequentially connected in series, and described voltage detection circuit is connected with light source load, the voltage of Real-time Feedback light source load；
Described constant-current control module also includes the D/A current conversion module, current constant control loop and the current regulation loop that are sequentially connected in series, and described current regulation loop is connected with light source load, controls the maximum current of light source load in real time；
Described current detection module also includes the A/D current conversion module, current detection circuit and the current sampling circuit that are sequentially connected in series, and described current sampling circuit is connected with the current regulation loop of described constant-current control module, the electric current of Real-time Feedback light source load.
2. the detection method of the constant-current controller automatically detecting light source maximum operating currenbt described in claim 1, it is characterised in that comprise the following steps:
1) described voltage detection module and described constant-current control module are electrically connected with light source load to be measured, so that described main control module, voltage detection module, constant-current control module and light source load form loop；
2) described main control module sends current controling signal to described constant-current control module, the electric current that described constant-current control module exports is made to start to be gradually increased from 0, the detection when running voltage of light source load and operating current are put into effect by described voltage detection module and described current detection module；
3) real time operation voltage signal and the real time operation current signal of detection are fed back to described main control module by described voltage detection module and described current detection module；
4) when the real time operation magnitude of voltage that described voltage detection module is fed back is equal with the rated voltage of tested light source load, described main control module sends current controling signal to described constant-current control module, the electric current that described constant-current control module exports is made to stop increasing, and keep the current value of current output, the operating current that described current detection module detects light source load current feeds back to described main control module, and the current value currently exported by described constant-current control module is as the maximum operating currenbt of tested light source load, and this maximum operating currenbt and rated voltage are set up mapping relations；
5) when user sets different voltage, can be changed automatically according to mapping relations by the output electric current of light source load, be exported and keep current current value by constant-current control module described in described master control module controls.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109068446A (en) * | 2018-08-29 | 2018-12-21 | 广东奥普特科技股份有限公司 | A kind of linear constant current circuit and its control method with high conversion efficiency |
| CN112637991A (en) * | 2019-09-20 | 2021-04-09 | 台达电子工业股份有限公司 | Power supply applied to light emitting diode and operation method thereof |
| CN112930005A (en) * | 2021-02-01 | 2021-06-08 | 苏州华兴源创科技股份有限公司 | Light source driving method and circuit |
| WO2022001206A1 (en) * | 2020-07-03 | 2022-01-06 | 广东奥普特科技股份有限公司 | Control circuit and control method for measuring light source parameters |
| CN114698192A (en) * | 2022-05-07 | 2022-07-01 | 深圳市涌固精密治具有限公司 | Self-adaptive current constant-current source and control method |
| WO2023231109A1 (en) * | 2022-05-31 | 2023-12-07 | 广东奥普特科技股份有限公司 | Quick switching circuit for brightness of light source |
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| CN109068446A (en) * | 2018-08-29 | 2018-12-21 | 广东奥普特科技股份有限公司 | A kind of linear constant current circuit and its control method with high conversion efficiency |
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