CN211982182U - LED driving power supply circuit suitable for alternating current synchronous signal control - Google Patents
LED driving power supply circuit suitable for alternating current synchronous signal control Download PDFInfo
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- CN211982182U CN211982182U CN202020472033.7U CN202020472033U CN211982182U CN 211982182 U CN211982182 U CN 211982182U CN 202020472033 U CN202020472033 U CN 202020472033U CN 211982182 U CN211982182 U CN 211982182U
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- 238000005070 sampling Methods 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 19
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- 238000005859 coupling reaction Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 8
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Abstract
The utility model discloses a LED driving power circuit suitable for AC synchronous signal control, which comprises a rectifier, a resistor R1, a coupling device, a digital single chip microcomputer and an LED; the input end of the rectifier is connected with an alternating current power grid, the output end of the rectifier is connected with the primary side of the coupling device through a resistor R1, and the primary side of the coupling device is connected with a secondary ground wire on one side; the secondary side of the coupling device is connected with the input end of the digital single chip microcomputer through a sampling circuit, and the output end of the digital single chip microcomputer is connected with the LED; the secondary side of the coupling device is connected with an output voltage anode V +; the sampling circuit, the digital single chip microcomputer and the positive and negative electrodes V-of the output voltage are all grounded. The utility model discloses can realize that remote animation effect is synchronous, power integrated control module, power can be installed nearby, saves the cost, and wiring simple to operate is nimble, does not need solitary signal line, and the wiring is simple.
Description
Technical Field
The utility model relates to a LED drive power supply technical field specifically is a LED drive power supply circuit suitable for control of alternating current synchronous signal.
Background
When the LED driving power supply is used outdoors, animation control programs need to be provided for the LED lamps, and the distance between LED light sources used outdoors is often long, such as between street lamp poles and between buildings; at this time, if animation synchronization between the lamps is required to be controlled, a synchronous signal is required for control; in the traditional method, the LED light sources are connected and communicated by using a single controller, and the method has the defects of long control signal wires, difficult layout, complex installation and difficult maintenance. Therefore, the LED driving power circuit suitable for controlling the alternating current synchronous signal is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a LED drive power supply circuit suitable for exchange synchronizing signal control to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: an LED driving power supply circuit suitable for alternating current synchronous signal control comprises a rectifier, a resistor R1, a coupling device, a digital single chip microcomputer and an LED; the input end of the rectifier is connected with an alternating current power grid, the output end of the rectifier is connected with the primary side of the coupling device through a resistor R1, and the primary side of the coupling device is connected with a secondary ground wire on one side; the secondary side of the coupling device is connected with the input end of the digital single chip microcomputer through a sampling circuit, and the output end of the digital single chip microcomputer is connected with the LED; the secondary side of the coupling device is connected with an output voltage anode V +; the sampling circuit, the digital single chip microcomputer and the positive and negative electrodes V-of the output voltage are all grounded.
Preferably, the sampling circuit comprises a diode ZD1, 3 resistors and 2 capacitors, the cathode of the diode ZD1 is connected with the resistor R2, the anode of the diode ZD1 is connected with the resistor R3, and the resistor R2 and the resistor R3 are grounded; the capacitor C1 is connected with the resistor R2 in parallel, the capacitor C2 is connected with the resistor R3 in parallel, the cathode of the diode ZD1 is used as the input end of the sampling circuit and is connected with the secondary side of the coupling device, the anode of the diode ZD1 is connected with one end of the resistor R4, and the other end of the resistor R4 is used as the output end of the sampling circuit and is connected with the digital single chip microcomputer and used for outputting pulse square waves to the digital single chip microcomputer.
Preferably, the sampling circuit employs a comparator.
The input of an alternating current power grid is converted into pulsating direct current with 2 times of alternating current frequency through a rectifier, and the pulsating direct current is converted into pulsating low-voltage direct current through the current limitation of a resistor R1 and the pulsating direct current is coupled to the secondary side through a transformer or an optical coupler; then the pulsating low-voltage direct current passes through a sampling circuit, and the sampling voltage stabilization is changed into square waves with the alternating current frequency being 2 times.
The digital single chip microcomputer samples the square wave, the frequency of the square wave tracks the frequency of the power grid, and the frequency of the alternating current power grid can be used as a reference time of a digital single chip microcomputer program; the power supplies of each group are connected to the same alternating current power grid, so that the reference time of the power supplies of each group can be ensured to be the same, even if different phases of three-phase power are connected, the time difference is within 20ms, the animation effect is not influenced at all, and the time synchronization among the power supplies of each group can be realized through the reference time.
The digital single chip microcomputer is provided with an 8KB memory and can write animation programs needed by users, animation control signals are directly output to the LEDs without being controlled by an additional controller, and the LED control power supply which integrates a power supply and the controller and can realize animation synchronization is realized.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses can realize that remote animation effect is synchronous, power integrated control module, power can be installed nearby, saves the cost, and wiring simple to operate is nimble, does not need solitary signal line, and the wiring is simple.
Drawings
FIG. 1 is a schematic diagram of the overall circuit structure of the present invention;
fig. 2 is a schematic diagram of a sampling circuit structure in the present invention;
fig. 3 is the schematic diagram of the comparator structure adopted by the middle sampling circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: the LED driving power circuit suitable for controlling the alternating current synchronous signal comprises a rectifier, wherein the rectifier is connected with a resistor R1, the resistor R1 is connected with a primary side of a transformer or an optical coupler, a secondary side of the transformer or the optical coupler is connected with a sampling line, and the sampling line is connected with a digital single chip microcomputer.
The input of the alternating current power grid is changed into pulsating direct current with 2 times of alternating current frequency through a rectifier, and the pulsating direct current is converted into pulsating low-voltage direct current through a transformer or an optical coupler after being limited by a resistor R1 and then coupled to the secondary side.
The pulsating low-voltage direct current passes through a sampling circuit, and sampling and voltage stabilization are changed into square waves with the alternating current frequency being 2 times.
The digital single chip microcomputer samples the square wave, and the frequency of the square wave tracks the frequency of the power grid, so that the frequency of the alternating current power grid can be used as a reference time of a program of the digital single chip microcomputer; the power supplies of each group are connected to the same alternating current power grid, so that the reference time of the power supplies of each group can be ensured to be the same, even if different phases of three-phase power are connected, the time difference is within 20ms, the animation effect is not influenced at all, and the time synchronization among the power supplies of each group can be realized through the reference time.
The digital single chip microcomputer is provided with an 8KB memory and can write animation programs needed by users, animation control signals are directly output to the LEDs without being controlled by an additional controller, and the LED control power supply which integrates a power supply and the controller and can realize animation synchronization is realized.
The voltage of an alternating current power grid is rectified by a rectifier and coupled to a secondary side by a coupling device; the voltage of the power grid is 220Vac/50Hz domestically, and the voltage can fluctuate at different time but is basically between 180Vac and 264 Vac; the frequency is between 47Hz and 53 Hz; grid voltage is 220 × sin (2 × pi × f1 × t), f1 is grid frequency, and t is phase time.
The rectified voltage becomes |. 220 behavior √ 2 behavior √ sin (2 behavior |. pi behavior × f1 behavior) |; a current limiting resistor and an optical coupler, wherein the current is |. 220 |. V2 | _ sin (2 |. pi |. f1 |) t/R1, the amplification factor of the optical coupler is set as beta, and the secondary side current of the optical coupler is |. 220 |. V2 |. sin (2 |. pi |. f1 |) beta/R1;
the current is sampled by a sampling circuit, the sampling circuit mainly has the function of converting the current into a pulsating square wave which can be identified by a single chip microcomputer, wherein the method comprises a, a simple method is shown in figure 2, voltage is obtained through a resistor R2, filtering is carried out through a capacitor C1, voltage allowed by the digital single chip microcomputer is obtained at a resistor R3 after the voltage is stabilized through a voltage stabilizing tube ZD1, filtering is carried out through the capacitor C2, and the resistor R4 is a current limiting resistor at the input end of the digital single chip microcomputer; the resulting pulsating square wave had an amplitude of 220 × v 2 × R2/R1-Vzd1 and a frequency of 2f 1.
As shown in fig. 3, the circuit can obtain a more accurate square wave through the comparator, the digital single chip adopts a square wave signal, the frequency of the square wave signal, namely 2 times of the power grid frequency, is used as a time reference, and the 8KB memory can operate.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the term "includes
"comprises," "comprising," or any other variation thereof, is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An LED driving power supply circuit suitable for alternating current synchronous signal control is characterized by comprising a rectifier, a resistor R1, a coupling device, a digital single chip microcomputer and an LED; the input end of the rectifier is connected with an alternating current power grid, the output end of the rectifier is connected with the primary side of the coupling device through a resistor R1, and the primary side of the coupling device is connected with a secondary ground wire on one side; the secondary side of the coupling device is connected with the input end of the digital single chip microcomputer through a sampling circuit, and the output end of the digital single chip microcomputer is connected with the LED; the secondary side of the coupling device is connected with an output voltage anode V +; the sampling circuit, the digital single chip microcomputer and the positive and negative electrodes V-of the output voltage are all grounded.
2. The LED driving power supply circuit suitable for the control of the alternating current synchronous signal as claimed in claim 1, wherein the sampling circuit comprises a diode ZD1, 3 resistors and 2 capacitors, the cathode of the diode ZD1 is connected with a resistor R2, the anode of the diode ZD1 is connected with a resistor R3, and the resistor R2 and the resistor R3 are grounded; the capacitor C1 is connected with the resistor R2 in parallel, the capacitor C2 is connected with the resistor R3 in parallel, the cathode of the diode ZD1 is used as the input end of the sampling circuit and is connected with the secondary side of the coupling device, the anode of the diode ZD1 is connected with one end of the resistor R4, and the other end of the resistor R4 is used as the output end of the sampling circuit and is connected with the digital single chip microcomputer and used for outputting pulse square waves to the digital single chip microcomputer.
3. The LED driving power circuit suitable for AC synchronous signal control as recited in claim 1, wherein said sampling circuit employs a comparator.
4. An LED driving power supply circuit adapted for ac synchronous signal control as recited in claim 1, wherein said coupling device is a transformer or an optocoupler.
5. The LED driving power circuit suitable for AC synchronous signal control as claimed in claim 2, wherein said diode ZD1 is a voltage regulator tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020472033.7U CN211982182U (en) | 2020-04-03 | 2020-04-03 | LED driving power supply circuit suitable for alternating current synchronous signal control |
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| CN202020472033.7U CN211982182U (en) | 2020-04-03 | 2020-04-03 | LED driving power supply circuit suitable for alternating current synchronous signal control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114501726A (en) * | 2021-12-31 | 2022-05-13 | 上海矽力杰微电子技术有限公司 | Multi-channel LED system, driving circuit and driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114501726A (en) * | 2021-12-31 | 2022-05-13 | 上海矽力杰微电子技术有限公司 | Multi-channel LED system, driving circuit and driving method |
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Address after: 311199, 7th Floor, Building 1, No. 587 Kangxin Road, Linping Street, Linping District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Zhongxinli Intelligent Equipment Co.,Ltd. Address before: 5 / F, building 2, 650 WangMei Road, Linping street, Yuhang District, Hangzhou City, Zhejiang Province 311100 Patentee before: HANGZHOU ZHONGXINLI TECHNOLOGY CO.,LTD. |