CN110572900A - novel LED dimming drive circuit - Google Patents
novel LED dimming drive circuit Download PDFInfo
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- CN110572900A CN110572900A CN201910783943.9A CN201910783943A CN110572900A CN 110572900 A CN110572900 A CN 110572900A CN 201910783943 A CN201910783943 A CN 201910783943A CN 110572900 A CN110572900 A CN 110572900A
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Abstract
The invention discloses a novel LED dimming driving circuit which comprises an AC power supply, a silicon controlled dimmer, a rectifying circuit element, a filter circuit unit, a dimming control and driving module and a load element. The dimming control and driving module includes: the device comprises a signal detection module, a signal conversion module, a PWM dimming control module, a dimming compatibility module and a driving module. The AC power supply is connected with the silicon controlled rectifier dimmer and the rectifying circuit element, the filter circuit unit, the dimming control and driving module and the load element in sequence, in the dimming control and driving module: and the signal detection module is connected with the signal conversion module. The invention solves the problems of compatibility and flicker when the LED dimming power supply is connected with a front switch and a rear switch and the dimmers of the same type, and solves the problem that the light change in the dimming process is not smooth enough. The invention realizes the LED silicon controlled rectifier dimming driving solution which can be compatible with the full voltage of 90V-265V input.
Description
Technical Field
The invention relates to the technical field of LED dimming driving, in particular to a novel LED dimming driving circuit.
background
The silicon controlled dimmer is a physical dimmer, starting from an alternating current phase 0, chopping input voltage, and inputting voltage until the silicon controlled is conducted, and has the principle that the conduction angle of each half-wave of alternating current is adjusted to change a sine waveform, so that the effective value of alternating current is changed, and the aim of dimming is fulfilled; the existing LED lamp cannot be used in a full-voltage (90-265V) environment during dimming; flickering when the power grid is unstable; poor compatibility when using front cut and back cut various dimmers, flickering, and smooth change of light during dimming.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a novel LED dimming driving circuit.
in order to achieve the purpose, the invention adopts the following technical scheme: a novel LED dimming drive circuit comprises an AC power supply, a silicon controlled rectifier dimmer, a rectifying circuit element, a filter circuit unit, a dimming control and drive module and a load element. The dimming control and driving module includes: the device comprises a signal detection module, a signal conversion module, a PWM dimming control module, a dimming compatibility module and a driving module. The AC power supply is connected with the silicon controlled rectifier dimmer and the rectifying circuit element, the filter circuit unit, the dimming control and driving module and the load element in sequence, in the dimming control and driving module: the signal detection module is connected with the signal conversion module, and the PWM dimming control module and the dimming compatibility module are connected with the driving module.
As a further description of the above technical solution:
The signal detection module includes: phase angle detection, duty cycle detection and area detection, the drive module includes: the constant voltage and constant current control driving module, the constant voltage control driving module and the constant current control driving module, and the signal conversion module is used for analyzing and processing signals and converting received signals into PWM signals.
As a further description of the above technical solution:
The input voltage of the AC power supply is 120V, 230V and the full voltage normally works, and when the input voltage of the AC power supply is changed without being connected with a silicon controlled rectifier dimmer, the change of the output current is less than 3%.
As a further description of the above technical solution:
The AC power supply alternating current power supply passes through a special sine wave signal which is generated by the silicon controlled rectifier dimmer and has a conduction angle controlled by the silicon controlled rectifier, and the dimming control and driving module comprises: the signal detection module detects a phase angle signal or a duty ratio signal or an area signal and transmits the phase angle signal or the duty ratio signal or the area signal to the signal conversion module, the signal conversion module analyzes and processes the signal and converts the signal into a PWM signal and transmits the PWM signal to the PWM dimming control module and the dimming compatibility module, the PWM dimming control module and the dimming compatibility module control the driving module to adjust output current, the driving module feeds information back to the PWM dimming control module and the dimming compatibility module, the PWM dimming control module and the dimming compatibility module analyze and feed back information to adjust and control the driving module, and the dimming control and driving module drives the load element to realize dimming.
As a further description of the above technical solution:
When the waveforms of the upper half shaft and the lower half shaft of the silicon controlled dimmer are different, the signal conversion module analyzes and processes the received signals and converts the signals into PWM signals to be transmitted to the PWM dimming control module and the dimming compatibility module to optimize the dimming effect, and the problem of flicker when the upper half shaft and the lower half shaft are inconsistent is solved.
As a further description of the above technical solution:
When the front-cut and rear-cut multi-type silicon controlled light modulator is used, various signals are greatly different, the signal conversion module analyzes and processes the received signals and converts the signals into PWM signals to be transmitted to the PWM light modulation control module and the light modulation compatibility module, the light modulation effect is optimized, and the flicker problem is avoided.
As a further description of the above technical solution:
When the silicon controlled rectifier dimmer adjusts the small angle, the signal conversion module analyzes and processes the received signal and converts the signal into a PWM signal to be transmitted to the PWM dimming control module and the dimming compatibility module, the PWM dimming control module and the dimming compatibility module control the driving module, the driving module feeds back real-time information to the PWM dimming control module and the dimming compatibility module, and the PWM dimming control module and the dimming compatibility module analyze and process feedback signal optimization effect real-time control to the driving module, optimize the dimming effect and avoid the small-angle flicker problem.
the invention has the following beneficial effects: in the invention, the AC power supply generates a special sine wave signal with a conduction angle controlled by the controlled silicon through the controlled silicon dimmer, and the dimming control and driving module comprises: the signal detection module detects a phase angle signal or a duty ratio signal or an area signal and transmits the phase angle signal or the duty ratio signal or the area signal to the signal conversion module, the signal conversion module analyzes, processes and converts the signal into a PWM signal and transmits the PWM signal to the PWM dimming control module and the dimming compatibility module, the PWM dimming control module and the dimming compatibility module control the driving module to adjust output current, the driving module feeds information back to the PWM dimming control module and the dimming compatibility module, the PWM dimming control module and the dimming compatibility module analyze, feed back the information, adjust and control the driving module, and the dimming control and driving module drives a load element to achieve dimming. The invention solves the problems of compatibility and flicker when the LED dimming power supply is connected with a front switch and a rear switch and the dimmers of the same type, and solves the problem that the light change in the dimming process is not smooth enough. The invention realizes the LED silicon controlled rectifier dimming driving solution which can be compatible with the full voltage of 90V-265V input.
Drawings
fig. 1 is a schematic overall circuit diagram of a novel LED dimming driving circuit according to the present invention.
Illustration of the drawings:
1. An AC power source; 2. a silicon controlled dimmer; 3. a rectifier circuit element; 4. a filter circuit unit; 5. a signal detection module; 6. a drive module; 7. a load element; 8. a signal conversion module; 9. the device comprises a PWM dimming control module and a dimming compatibility module; 10. dimming control and drive module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present invention provides an embodiment: a novel LED dimming drive circuit comprises an AC power supply 1, a silicon controlled dimmer 2, a rectifying circuit element 3, a filter circuit unit 4, a dimming control and drive module 10 and a load element 7. The dimming control and driving module 10 includes: the device comprises a signal detection module 5, a signal conversion module 8, a PWM dimming control module, a dimming compatibility module 9 and a driving module 6. AC power 1 is connected with silicon controlled rectifier dimmer 2 and rectifier circuit component 3, filter circuit unit 4, dimming control and drive module 10 and load element 7 in proper order, in dimming control and the drive module 10: the signal detection module 5 is connected with the signal conversion module 8, and the PWM dimming control module and the dimming compatibility module 9 are connected with the driving module 6.
the signal detection module 5 includes: phase angle detection, duty cycle detection and area detection, drive module 6 includes: the constant voltage and constant current control driving module, the constant voltage control driving module and the constant current control driving module, and the signal conversion module 8 has the functions of signal analysis and processing and converting received signals into PWM signals; the input voltage of the AC power supply 1 is 120V90-140V 60HZ, 230V180-277V 50HZ and full voltage 90-277V, the normal work is realized, and when the input voltage of the AC power supply 1 is changed without connecting the silicon controlled dimmer 2, the change of the output current is less than 3%; the AC power supply 1 is a special sine wave signal with a conduction angle controlled by a silicon controlled rectifier, which is generated by an AC power supply through a silicon controlled rectifier dimmer 2, and in a dimming control and driving module 10: the signal detection module 5 detects a phase angle signal or a duty ratio signal or an area signal and transmits the phase angle signal or the duty ratio signal or the area signal to the signal conversion module 8, the signal conversion module 8 analyzes and processes the signal and converts the signal into a PWM signal and transmits the PWM signal to the PWM dimming control module and the dimming compatibility module 9, the PWM dimming control module and the dimming compatibility module 9 control the driving module 6 to adjust output current, the driving module 6 feeds information back to the PWM dimming control module and the dimming compatibility module 9, the PWM dimming control module and the dimming compatibility module 9 analyze and feed back the information to adjust the driving module 6, and the dimming control and driving module 10 drives the load element 7 to realize dimming; when the waveforms of the upper half shaft and the lower half shaft of the silicon controlled dimmer 2 are different, the signal conversion module 8 analyzes and processes the received signals and converts the signals into PWM signals and transmits the PWM signals to the PWM dimming control module and the dimming compatibility module 9 to optimize the dimming effect, so that the problem of flicker when the upper half shaft and the lower half shaft are inconsistent is avoided; when the front-cut and rear-cut multi-type silicon controlled light modulator 2 is used, various signals are greatly different, the signal conversion module 8 analyzes and processes the received signals and converts the signals into PWM signals and transmits the PWM signals to the PWM light modulation control module and the light modulation compatibility module 9 to optimize the light modulation effect, and the problem of flicker is avoided; when the silicon controlled dimmer 2 is adjusted to a small angle, the signal conversion module 8 analyzes and processes the received signal and converts the signal into a PWM signal to be transmitted to the PWM dimming control module and the dimming compatibility module 9, the PWM dimming control module and the dimming compatibility module 9 control the driving module 6, the driving module 6 feeds real-time information back to the PWM dimming control module and the dimming compatibility module 9, the PWM dimming control module and the dimming compatibility module 9 analyze and process the feedback signal to optimize the effect of the driving module 6, the dimming effect is optimized, and the problem of small-angle flicker is solved.
The working principle is as follows: the AC power supply 1 generates a special sine wave signal with a conduction angle controlled by a silicon controlled rectifier through a silicon controlled rectifier dimmer 2, and in a dimming control and driving module 10: the signal detection module 5 detects a phase angle signal or a duty ratio signal or an area signal and transmits the phase angle signal or the duty ratio signal or the area signal to the signal conversion module 8, the signal conversion module 8 analyzes and processes the signal and converts the signal into a PWM signal and transmits the PWM signal to the PWM dimming control module and the dimming compatibility module 9, the PWM dimming control module and the dimming compatibility module 9 control the driving module 6 to adjust output current, the driving module 6 feeds information back to the PWM dimming control module and the dimming compatibility module 9, the PWM dimming control module and the dimming compatibility module 9 analyze and feed back the information to adjust the driving module 6, and the dimming control and driving module 10 drives the load element 7, so that the output voltage and the output current are in a constant voltage and constant current state or a constant current state when the silicon controlled dimmer 2.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A novel LED dimming drive circuit comprises an AC power supply (1), a silicon controlled dimmer (2), a rectifying circuit element (3), a filter circuit unit (4), a dimming control and drive module (10) and a load element (7). The dimming control and driving module (10) comprises: the device comprises a signal detection module (5), a signal conversion module (8), a PWM dimming control module, a dimming compatibility module (9) and a driving module (6). The method is characterized in that: AC power supply (1) is connected with silicon controlled rectifier dimmer (2) and rectifier circuit component (3), filter circuit unit (4), dimming control and drive module (10) and load component (7) in proper order, in dimming control and the drive module (10): the signal detection module (5) is connected with the signal conversion module (8), and the PWM dimming control module and the dimming compatibility module (9) are connected with the driving module (6).
2. The novel LED dimming driving circuit according to claim 1, wherein: the signal detection module (5) comprises: phase angle detection, duty cycle detection and area detection, the drive module (6) includes: the constant voltage and constant current control driving module, the constant voltage control driving module and the constant current control driving module, and the signal conversion module (8) is used for analyzing and processing signals and converting received signals into PWM signals.
3. the novel LED dimming driving circuit according to claim 2, wherein: the input voltage of the AC power supply (1) is 120V (90-140V 60HZ), 230V (180-277V 50HZ) and the full voltage (90-277V) normally works, and when the input voltage of the AC power supply (1) is changed without the connection of the silicon controlled dimmer (2), the change of the output current is less than 3%.
4. The novel LED dimming driving circuit according to claim 3, wherein: the AC power supply (1) is a special sine wave signal which is generated by the AC power supply (1) through the silicon controlled rectifier dimmer (2) and has a conduction angle controlled by the silicon controlled rectifier, and in the dimming control and drive module (10): the signal detection module (5) detects phase angle signals or duty ratio signals or area signals and transmits to the signal conversion module (8), the signal conversion module (8) analyzes, processes and converts signals into PWM signals and transmits to the PWM dimming control module and the dimming compatibility module (9), the PWM dimming control module and the dimming compatibility module (9) control the driving module (6) to adjust output current, the driving module (6) feeds information back to the PWM dimming control module and the dimming compatibility module (9), the PWM dimming control module and the dimming compatibility module (9) analyze and feed back information adjustment control the driving module (6), and the dimming control and driving module (10) drives the load element (7) to realize dimming.
5. The novel LED dimming driving circuit according to claim 4, wherein: when the waveforms of the upper half shaft and the lower half shaft of the silicon controlled dimmer (2) are different, the signal conversion module (8) analyzes and processes the received signals and converts the signals into PWM signals to be transmitted to the PWM dimming control module and the dimming compatibility module (9) to optimize the dimming effect, and the problem of flicker when the upper half shaft and the lower half shaft are inconsistent is solved.
6. The novel LED dimming driving circuit according to claim 5, wherein: when the front-cut and rear-cut multi-type silicon controlled light modulator (2) is used, various signals are greatly different, the signal conversion module (8) analyzes and processes the received signals and converts the signals into PWM signals to be transmitted to the PWM dimming control module and the dimming compatibility module (9), so that the dimming effect is optimized, and the flicker problem is avoided.
7. The novel LED dimming driving circuit according to claim 6, wherein: when silicon controlled rectifier dimmer (2) adjusted the low-angle, signal conversion module (8) analysis and processing received signal and convert the signal to PWM signal transmission extremely PWM dimming control module and compatible module (9) of adjusting luminance, PWM dimming control module and compatible module (9) control of adjusting luminance drive module (6), drive module (6) feed back real-time information PWM dimming control module and compatible module (9) of adjusting luminance, PWM dimming control module and compatible module (9) analysis processing feedback signal optimization effect real-time control of adjusting luminance drive module (6), optimize the effect of adjusting luminance, the scintillation problem of the small angle of avoiding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910783943.9A CN110572900A (en) | 2019-08-23 | 2019-08-23 | novel LED dimming drive circuit |
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| CN201910783943.9A CN110572900A (en) | 2019-08-23 | 2019-08-23 | novel LED dimming drive circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083747A (en) * | 2020-06-30 | 2020-12-15 | 海益（厦门）建材工业有限公司 | Heating control method and device for inhibiting flicker interference |
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