CN117856161A - Leakage protection circuit of LED lamp - Google Patents
Leakage protection circuit of LED lamp Download PDFInfo
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Abstract
The application relates to an LED lamp leakage protection circuit, which relates to the technical field of LED illumination and comprises a relay, wherein the input end of a normally closed contact of the relay is connected with the output end of an LED power supply, and the output end of the normally closed contact is connected with the input end of an LED lamp panel; the electric leakage detection module is connected with the input end of the relay; when the electric leakage detection module is electrified to the relay, the normally-closed contact of the relay is disconnected. The LED lamp has the effects of reducing the leakage risk of the LED lamp and improving the safety of the LED lamp.
Description
Technical Field
The application relates to the technical field of LED illumination, in particular to an LED lamp leakage protection circuit.
Background
The LED illumination is a novel light source which is rapidly developed in recent years, has the good characteristics of energy conservation, environmental protection, long service life, flexible dimming and the like, and enables the application range of the LED illumination to be wider and wider. At present, due to the requirements of light efficiency and cost, non-isolated driving power supplies are used for more and more lamps, and the non-isolated driving power supplies have the advantages of few parts, high reliability, high efficiency and the like.
However, the LED lamp panel of the LED lamp is generally directly installed on the housing of the LED lamp, there is no insulation effect between the LED lamp panel and the housing, all insulation effects are all by the aluminum substrate of the LED lamp panel, when the aluminum substrate of the LED lamp panel breaks down, current may be LED to the housing through the non-isolated power source, and when the housing of the lamp is poorly grounded, the electrified leakage condition of the housing of the lamp will occur, resulting in a certain risk of electric shock for the user in use.
Disclosure of Invention
The purpose of this application is to provide a LED lamps and lanterns electric leakage protection circuit, can reduce the electric leakage risk of LED lamps and lanterns, promotes the security of LED lamps and lanterns.
The application provides a LED lamps and lanterns earth leakage protection circuit adopts following technical scheme:
the LED lamp leakage protection circuit comprises a relay, wherein the input end of a normally closed contact of the relay is connected with the output end of an LED power supply, and the output end of the normally closed contact is connected with the input end of an LED lamp panel;
the electric leakage detection module is connected with the input end of the relay;
when the electric leakage detection module is electrified to the relay, the normally-closed contact of the relay is disconnected.
Through adopting above-mentioned technical scheme, when the use principle of relay reaches the regulation requirement for the change of input, can make the controlled quantity take place predetermined step change in electric output circuit, this application carries out the switch to LED power output through the relay, then switch on the relay when electric leakage detection module detects the electric leakage condition, make the normally closed contact disconnection of the junction of LED power and LED lamp plate, carry out the outage to the junction of LED power and LED lamp plate to realize the leakage protection of LED lamps and lanterns, can effectively reduce the electric leakage risk of LED lamps and lanterns, promote the security of LED lamps and lanterns.
Further, the electric leakage detection module comprises a zero sequence current transformer which is connected between the normally closed contact output end of the relay and the input end of the LED lamp panel;
the zero sequence current transformer is used for detecting whether a difference exists between alternating current LED+ and LED-output by the LED power supply to the LED lamp panel.
By adopting the technical scheme, the zero-sequence current transformer can generate zero-sequence grounding current, and can realize leakage protection of the LED lamp when being matched with the relay. Because the LED power supply outputs alternating current to the LED lamp panel, when the LED lamp panel leaks electricity, the parasitic capacitance corresponding to the LED lamp panel is short-circuited, at the moment, a part of current of the alternating current LED+ flows to the shell of the LED lamp through the LED lamp panel and flows out through the shell, and at the moment, the current of the alternating current LED+ is not equal to the current of the alternating current LED-. The zero sequence current transformer can detect whether an alternating current LED+ and an alternating current LED-have a difference value, if the difference value is the current leakage condition, the reliability of the leakage detection module and the accuracy of leakage detection can be ensured through the zero sequence current transformer.
Furthermore, the leakage detection module further comprises a leakage protection switch chip, and the output end of the zero sequence current transformer is connected with a leakage signal input pin of the leakage protection switch chip;
when the zero sequence current transformer detects that the current LED+ and the LED-which are output to the LED lamp panel by the LED power supply have a difference value, the zero sequence current transformer generates a leakage signal and sends the leakage signal to a leakage signal input pin of the leakage protection switch chip.
Through adopting above-mentioned technical scheme, when zero sequence current transformer detects the electric leakage condition, generate the electric leakage signal and send to electric leakage protection switch chip, electric leakage protection switch chip judges whether need carry out electric leakage protection through receiving the electric leakage signal, has further ensured the reliability of electric leakage detection module.
Further, the leakage protection switch chip further comprises a first high-level output pin, and the first high-level output pin is connected with the input end of the relay;
when the first high level output pin outputs a first high level to the relay, the normally closed contact of the relay is opened.
Through adopting above-mentioned technical scheme, this application earth leakage protection switch chip receives the electric leakage signal and is the current condition of having electric leakage, then exports first high level through first high level output pin, and the relay receives the first high level that earth leakage protection switch chip sent, then normally closed contact disconnection to make LED power and LED lamp plate disconnection, ensure that the LED lamp plate can't produce electric leakage through between input-LED power-LED lamp plate-the LED lamp shell, thereby play effective anticreep effect, ensure the security of LED lamps and lanterns.
Further, a first diode, a first resistor, a triode and a second resistor are sequentially connected between the first high-level output pin and the input end of the relay;
the base of the triode is connected with a first high-level output pin through a first diode and a first resistor, the collector of the triode is connected with a relay through a second resistor, and the emitter of the triode is grounded.
Through adopting above-mentioned technical scheme, after the leakage protection switch chip output first high level, through first diode control first resistance, and then make the triode switch on, make the relay switch on through the triode, further strengthen leakage protection circuit's reliability.
The LED power supply comprises an LED power supply, a dimmer control module and a dimming control module, wherein the dimmer control module is connected with the LED power supply through a power supply, and the dimmer control module is connected with the dimmer control module through a power supply;
the dimming signal conversion module is used for converting the dimming signal input by the dimmer and outputting the dimming signal to the LED power supply.
Through adopting above-mentioned technical scheme, the LED power is except that need provide the power for the LED lamp plate, still need receive the information of adjusting luminance and adjust luminance to the LED lamp plate to ensure user's use experience.
Further, the dimming signal conversion module comprises a dimming signal conversion chip, wherein the dimming signal conversion chip comprises a dimming signal input pin and a second high-level output pin;
the dimming signal input pin is connected with the output end of the dimmer, and the second high-level output pin is connected with the input end of the relay;
when the second high level output pin outputs the second high level to the relay, the normally closed contact of the relay is opened.
Through adopting above-mentioned technical scheme, at present usually use 0-10V light modulator to adjust luminance to the LED, because the LED power is usually non-isolated power, when being applied to the occasion of 0-10V dimming control with non-isolated power, turn off when 0-10V light modulator, because the existence of LED lamp plate parasitic capacitance can lead to the LED lamp plate to produce afterglow to influence user's use experience. Therefore, the dimming signal conversion chip detects the signal transmission condition of the dimmer connected with the dimming signal input pin, when the dimmer is detected to be turned off, the second high level is output to the relay through the second high level output pin, and the normally closed contact is disconnected when the relay receives the high level, so that the LED power supply and the LED lamp panel are disconnected, the LED lamp panel cannot form afterglow through a loop between the input-LED power supply-LED lamp panel-lamp panel parasitic capacitance-LED lamp shell-ground, the afterglow removing effect is achieved, and the use experience of a user is enhanced.
Further, a third resistor, a second diode, a first resistor, a triode and a second resistor are sequentially connected between the second high-level output pin and the input end of the relay;
the base of the triode is connected with a second high-level output pin through a third resistor, a second diode and a first resistor, the collector of the triode is connected with a relay through a second resistor, and the emitter of the triode is grounded.
Through adopting above-mentioned technical scheme, after the second high level of dimming signal conversion chip output, through the first resistance of second diode control, and then make the triode switch on, make the relay circular telegram through the triode, further strengthen the reliability of going the afterglow effect.
Furthermore, the output end of the dimming signal conversion module is connected with the signal input end of the LED power supply through a signal transmission optocoupler.
Through adopting above-mentioned technical scheme, because the signal conversion module output that adjusts luminance is high frequency alternating current, in order to ensure the security of switching on the LED power, this application carries out signal isolation through signal transmission opto-coupler, can keep apart high frequency alternating current to improve the signal transmission efficiency that adjusts luminance, thereby increase the security and the reliability of LED power.
Furthermore, the input end of the dimming signal conversion module is connected with the output end of the dimmer through the lightning protection module and the backflow prevention module in sequence.
Through adopting above-mentioned technical scheme, this application is through lightning protection module to the light modulator lightning protection, prevents through preventing flowing backward the module that the AC from flowing backward, plays the guard action to the light signal conversion chip, has further promoted the security of LED lamps and lanterns.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the LED lamp, the output end of the LED power supply is switched on through the relay, when the leakage detection module detects a leakage condition, the relay is electrified, so that the normally-closed contact at the joint of the LED power supply and the LED lamp panel is disconnected, and the LED power supply and the LED lamp panel are powered off, so that the leakage protection of the LED lamp is realized, the leakage risk of the LED lamp can be effectively reduced, and the safety of the LED lamp is improved;
2. the zero sequence current transformer can detect whether the alternating current LED+ and the alternating current LED-have a difference value, if the difference value is the current leakage condition, the reliability of the leakage detection module and the accuracy of leakage detection can be ensured through the zero sequence current transformer;
3. the leakage protection switch chip outputs a first high level through the first high level output pin when receiving a leakage signal, and the relay receives the first high level sent by the leakage protection switch chip, and then the normally closed contact is disconnected, so that the LED power supply and the LED lamp panel are disconnected, the LED lamp panel cannot generate leakage through the input-LED power supply-LED lamp panel-LED lamp shell, an effective anti-leakage effect is achieved, and the safety of the LED lamp is ensured;
4. according to the dimming signal conversion chip, the dimming signal input pin is detected to be connected to the dimmer signal transmission condition, when the dimming is detected to be turned off, the second high level is output to the relay through the second high level output pin, and the normally closed contact is disconnected when the relay receives the high level, so that the LED power supply and the LED lamp panel are disconnected, the LED lamp panel cannot form afterglow through a loop between the input-LED power supply-LED lamp panel-lamp panel parasitic capacitance-LED lamp shell-ground, the afterglow removing effect is achieved, and the use experience of a user is enhanced.
Drawings
FIG. 1 is a schematic diagram of a modular connection of an embodiment of the present application;
FIG. 2 is an overall circuit schematic of an embodiment of the present application;
FIG. 3 is a schematic circuit diagram of a leakage detection module according to an embodiment of the present application;
fig. 4 is a dimming signal conversion block diagram according to an embodiment of the present application;
FIG. 5 is a schematic circuit diagram of a lightning protection module and a backflow prevention module according to an embodiment of the present application;
in the figure, 1, an LED power supply; 2. an LED lamp panel; 3. an LED lamp housing; 4. parasitic capacitance of the lamp panel; 5. a relay; 6. the electric leakage detection module; 61. a zero sequence current transformer; 7. a dimming signal conversion module; 8. a lightning protection module; 9. and the backflow prevention module.
Detailed Description
The present application is described in further detail below with reference to fig. 1-5.
The LED lamp panel of LED lamp is generally directly installed on the shell of LED lamp, there is not insulating effect between LED lamp panel and the shell, all insulating effects are all by the aluminium base board of LED lamp panel itself, when the aluminium base board of LED lamp panel 2 breaks down, can lead to the electric current to pass to the shell through non-isolated power supply, when the lamp shell is poorly grounded, will appear the electrified electric leakage condition of lamp shell, lead to the user to have certain electric shock risk when using, therefore this application embodiment provides an LED lamp earth leakage protection circuit, refer to fig. 1, including LED power 1, LED lamp panel 2, LED lamp shell 3, there is not insulating effect between LED lamp panel 2 and the LED lamp shell 3, consequently, can exist a plurality of parasitic capacitance. In the embodiment, a relay 5 is arranged between an LED power supply 1 and an LED lamp panel 2, the input end of a normally closed contact of the relay 5 is connected with the output end of the LED power supply 1, and the output end of the normally closed contact is connected with the input end of the LED lamp panel 2. The embodiment further comprises a leakage detection module 6, the output end of the leakage detection module 6 is connected with the input end of the relay 5, the leakage detection module 6 is used for detecting the leakage condition of the LED, and when the leakage detection module 6 is electrified to the relay 5, the normally closed contact of the relay 5 is disconnected.
The implementation principle of the embodiment of the application is as follows: the normally closed contact of the relay 5 can switch the output end of the LED power supply 1, when the electric leakage detection module 6 detects the electric leakage condition, the relay 5 is electrified, so that the normally closed contact of the junction of the LED power supply 1 and the LED lamp panel 2 is disconnected, the junction of the LED power supply 1 and the LED lamp panel 2 is powered off, the electric leakage protection of the LED lamp is realized, the electric leakage risk of the LED lamp can be effectively reduced, and the safety of the LED lamp is improved.
As shown in fig. 1, this embodiment further includes a dimming signal conversion module 7, a lightning protection module 8, and a backflow prevention module 9, where an input end of the dimming signal conversion module 7 is connected to an output end of the dimmer through the lightning protection module 8 and the backflow prevention module 9, and an output end of the dimming signal conversion module 7 is connected to a dimming signal input end of the LED power supply 1. The dimming signal conversion module 7 is used for converting and outputting a dimming signal input by a dimmer to the LED power supply 1, the lightning protection module 8 is used for lightning protection of the dimmer, and the backflow prevention module 9 is used for preventing AC from flowing backwards to the dimming signal conversion module 7.
As shown in fig. 2, the LED power supply 1 has electromagnetic interference filtering and rectifying filtering effects, and performs electromagnetic interference filtering and rectifying filtering on the alternating current input from the N1 port and the L2 port to convert the alternating current into stable current which can be output to the LED lamp panel 2, where the chip U1 is a dimming power switch chip, and a dimming power switch chip with a chip model SY5881Z may be adopted in specific implementation. The chip U2 is a PFC constant voltage control chip, and can adopt the PFC constant voltage control chip with the chip model BP2628 for stabilizing the voltage of the power supply in specific implementation. The LED power supply 1 is connected with the LED lamp panel 2 through the V+1 port and the V-1 port, and outputs a stable power supply with dimming information to the LED lamp panel 2, so that the LED lamp panel 2 can emit light normally and stably.
The dimmer is connected to the leakage protection circuit through the D+1 port and the D-1 port, and transmits the dimming signal to the dimming signal conversion module 7 through the lightning protection module 8 and the backflow prevention module 9. In the specific implementation, the dimmer adopts a 0-10V dimmer, the 0-10V dimmer transmits 0-10V dimming signals to the dimming signal conversion module 7, the dimming signal conversion module 7 converts the 0-10V dimming signals into PWM dimming signals, and the dimming signal conversion module 7 sends the PWM dimming signals to the signal input end of the LED power supply 1, so that 0-10V dimming of the LED lamp can be realized.
The dimming signal conversion module 7 sends a PWM dimming signal to the signal input end of the LED power supply 1 through the signal transmission optocoupler U3, and because the PWM dimming signal is a pulse signal, the pulse signal can be efficiently transmitted through the optocoupler, so that the transmission efficiency of the PWM dimming signal is enhanced, and the optocoupler can play the effect of isolating high-frequency alternating current, so that the safety and reliability of the LED power supply 1 are improved.
As shown in fig. 3, the leakage detection module 6 mainly includes a zero sequence current transformer 61, a leakage protection switch chip U8 and peripheral circuits thereof. The zero sequence current transformer 61 is connected between the normally closed contact output end of the relay 5 and the input end of the LED lamp panel 2 and is used for detecting whether a difference exists between alternating current LED+ and LED-output by the LED power supply 1 to the LED lamp panel 2. When the difference between the alternating current LED+ and the LED-indicates that a part of current flows to the shell of the LED lamp through the LED lamp panel 2 and flows out through the shell, the current leakage condition exists currently. When the zero sequence current transformer 61 detects that the alternating current led+ and LED-have a difference, that is, a current leakage condition exists, a leakage signal is generated and sent to the leakage protection switch chip U8. In specific implementation, the leakage protection switch chip U8 may be a leakage protection switch chip with a model CS54123 CB.
After the leakage protection switch chip U8 receives leakage signals through the leakage signal input pins of the pin 1 and the pin 2, the first high level output pin output of the pin 7 can start the first high level of the relay 5, the first high level passes through the diode D1 to control the resistor RA5, so that the triode QA2 is controlled to be opened, the base electrode of the triode QA2 is connected with the first high level output pin through the diode D1 and the resistor RA5, the collector electrode of the triode QA2 is connected with the output end JK1 port of the leakage detection module 6 through the resistor RA4, and the emitter electrode of the triode QA2 is grounded. The JK1 port is connected with the input end of the relay 5, the triode QA2 is turned on, then the first high level is output to the relay 5, the relay 5 is electrified, and the normally closed contact of the relay 5 is disconnected, so that the connection between the LED power supply 1 and the LED lamp panel 2 is disconnected, the LED lamp panel 2 cannot generate electric leakage through the input-LED power supply 1-the LED lamp panel 2-the LED lamp housing 3, an effective anti-leakage effect is achieved, and the safety of the LED lamp is ensured.
As shown in fig. 4, the dimming signal conversion module 7 includes a dimming signal conversion chip U4 and peripheral circuits thereof, where the dimming signal conversion chip U4 can receive the 0-10V dimming signal sent by the dimmer through the a port and the b port, convert the 0-10V dimming signal into a PWM dimming signal, and output the PWM dimming signal to the c port through the PWM dimming signal output pin of the pin No. 7, and the c port is connected with the signal transmission optocoupler U3, and the PWM dimming signal is transmitted to the LED power supply 1 through the signal transmission optocoupler U3, thereby realizing 0-10V dimming of the LED lamp panel 2. In specific implementation, the dimming signal conversion chip U4 may be a dimming signal conversion chip with a model number SD 7558.
As shown in fig. 3 and fig. 4, when the dimming signal conversion chip U4 detects that the dimmer stops outputting the 0-10V dimming signal, that is, the dimmer is turned OFF, the dimming signal conversion chip U4 outputs a second high level capable of starting the relay 5 through a second high level output pin of pin No. 3, the second high level flows to an OFF port through a diode D13, the OFF port is connected with a resistor RA5, the second high level controls the resistor RA5 through the diode D13, thereby controlling the transistor QA2 to be turned on, a base electrode of the transistor QA2 is connected with the second high level output pin through the diode D13 and the resistor RA5, a collector electrode of the transistor QA2 is connected with an output end JK1 port of the leakage detection module 6 through the resistor RA4, and an emitter electrode of the transistor QA2 is grounded. The JK1 port is connected with the input end of the relay 5, the triode QA2 is switched on, and then the second high level is output to the relay 5, so that the relay 5 is electrified, and the normally closed contact of the relay 5 is disconnected, so that the connection between the LED power supply 1 and the LED lamp panel 2 is disconnected, the LED lamp panel 2 cannot form afterglow through a loop between the input-LED power supply 1-LED lamp panel 2-lamp panel parasitic capacitance 4-LED lamp housing 3 and the ground, the afterglow removing effect is achieved, and the use experience of a user is enhanced.
As shown in fig. 5, the lightning protection module 8 mainly has a structure of a common-mode inductor LF3 and a varistor MOV4, and the dimmer is connected to the circuit from the d+1 port and the D-1 port through the common-mode inductor LF3, and the common-mode inductor LF3 and the varistor MOV4 can filter electromagnetic interference signals of the common mode, so as to play a role in lightning protection for the connected dimmer. The anti-backflow module 9 is connected with the input end of the dimming signal conversion module 7 through the port a and the port b, the anti-backflow module 9 adopts the anti-backflow diode D11 and the field effect transistor Q6, the anti-backflow module 9 can isolate the circuit, the independent work of the circuit is guaranteed, the AC backflow can be effectively prevented, the current backflow is prevented to the dimming signal conversion chip U4, the dimming signal conversion chip U4 is protected, and the safety of the LED lamp is further improved.
In the embodiment, the switch of the normally closed contact of the relay 5 is controlled by the common ground intersection of the first high-level output pin of the leakage protection switch chip U8 and the second output pin of the dimming signal conversion chip U4, and when the current leakage condition is detected by the leakage detection module 6, the normally closed contact of the relay 5 is controlled to be disconnected by outputting the first high-level to disconnect the LED power supply 1 and the LED lamp panel 2; when the dimming signal conversion module 7 detects that the current dimmer is turned off, the normally closed contact of the control relay 5 is opened by outputting a second high level to disconnect the LED power supply 1 and the LED lamp panel 2. The leakage protection circuit of the embodiment can effectively avoid safety accidents caused by the leakage of the LED lamp and can also play a role in preventing afterglow. Because the relay 5 is controlled by two chips, the circuit structure is simpler and the reliability is higher.
The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. The LED lamp leakage protection circuit is characterized by comprising a relay (5), wherein the input end of a normally closed contact of the relay (5) is connected with the output end of an LED power supply (1), and the output end of the normally closed contact is connected with the input end of an LED lamp panel (2);
the electric leakage detection device further comprises an electric leakage detection module (6), wherein the output end of the electric leakage detection module (6) is connected with the input end of the relay (5);
when the electric leakage detection module (6) is used for electrifying the relay (5), the normally closed contact of the relay (5) is disconnected.
2. The LED lamp leakage protection circuit according to claim 1, wherein the leakage detection module (6) comprises a zero sequence current transformer (61), and the zero sequence current transformer (61) is connected between the normally closed contact output end of the relay (5) and the input end of the LED lamp panel (2);
the zero sequence current transformer (61) is used for detecting whether a difference exists between an alternating current LED+ and an alternating current LED-which are output to the LED lamp panel (2) by the LED power supply (1).
3. The leakage protection circuit of the LED lamp according to claim 2, wherein the leakage detection module (6) further comprises a leakage protection switch chip, and the output end of the zero sequence current transformer (61) is connected with a leakage signal input pin of the leakage protection switch chip;
when the zero sequence current transformer (61) detects that the difference value exists between the current LED+ and the current LED-output by the LED power supply (1) to the LED lamp panel (2), the zero sequence current transformer (61) generates a leakage signal and sends the leakage signal to a leakage signal input pin of the leakage protection switch chip.
4. A leakage protection circuit for an LED lamp according to claim 3, wherein the leakage protection switch chip further comprises a first high level output pin, the first high level output pin being connected to an input terminal of a relay (5);
when the first high level output pin outputs a first high level to the relay (5), the normally closed contact of the relay (5) is opened.
5. The leakage protection circuit of the LED lamp according to claim 4, wherein a first diode, a first resistor, a triode and a second resistor are sequentially connected between the first high-level output pin and the input end of the relay (5);
the base of triode passes through first diode and first resistance and connects first high level output pin, and the collecting electrode of triode passes through second resistance and connects relay (5), and the projecting pole ground connection of triode.
6. The leakage protection circuit of an LED lamp according to any one of claims 1-5, further comprising a dimming signal conversion module (7), wherein an input end of the dimming signal conversion module (7) is connected to an output end of the dimmer, and an output end of the dimming signal conversion module (7) is connected to a dimming signal input end of the LED power supply (1);
the dimming signal conversion module (7) is used for converting a dimming signal input by the dimmer and outputting the dimming signal to the LED power supply (1).
7. The LED luminaire leakage protection circuit according to claim 6, characterized in that the dimming signal conversion module (7) comprises a dimming signal conversion chip comprising a dimming signal input pin and a second high level output pin;
the dimming signal input pin is connected with the output end of the dimmer, and the second high-level output pin is connected with the input end of the relay (5);
when the second high level output pin outputs the second high level to the relay (5), the normally closed contact of the relay (5) is opened.
8. The leakage protection circuit of the LED lamp according to claim 7, wherein a third resistor, a second diode, a first resistor, a triode and a second resistor are sequentially connected between the second high-level output pin and the input end of the relay (5);
the base of the triode is connected with a second high-level output pin through a third resistor, a second diode and a first resistor, and the collector of the triode is connected with a relay (5) through a second resistor, and the emitter of the triode is grounded.
9. The LED lamp leakage protection circuit according to claim 6, wherein the output end of the dimming signal conversion module (7) is connected with the signal input end of the LED power supply (1) through a signal transmission optocoupler.
10. The LED lamp leakage protection circuit according to claim 6, wherein the input end of the dimming signal conversion module (7) is connected with the output end of the dimmer through the lightning protection module (8) and the backflow prevention module (9) in sequence.
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| CN202410139039.5A CN117856161A (en) | 2024-01-31 | 2024-01-31 | Leakage protection circuit of LED lamp |
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| CN202410139039.5A CN117856161A (en) | 2024-01-31 | 2024-01-31 | Leakage protection circuit of LED lamp |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101572670B1 (en) * | 2015-09-10 | 2015-11-27 | (주)에이딕 | Street light control system having a function of preventing the breakage of the led due to such a leakage current and electric surge voltage |
| CN205195233U (en) * | 2015-10-30 | 2016-04-27 | 灵宝金源矿业股份有限公司 | Power leakage protector |
| CN109831851A (en) * | 2019-03-28 | 2019-05-31 | 四川艾贝斯科技发展有限公司 | A kind of street lamp single-lamp control system and control method |
| CN214412257U (en) * | 2021-01-04 | 2021-10-15 | 浙江苏泊尔热水器有限公司 | Electric leakage protection device and electric appliance |
| US20220330402A1 (en) * | 2021-04-13 | 2022-10-13 | Shenzhen Angui Technology Co., Ltd. | Dimming regulated power supply module and led dimming device |
| CN116209119A (en) * | 2023-03-21 | 2023-06-02 | 珠海市圣昌电子有限公司 | DALI dimming power supply load detection circuit and method |
-
2024
- 2024-01-31 CN CN202410139039.5A patent/CN117856161A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101572670B1 (en) * | 2015-09-10 | 2015-11-27 | (주)에이딕 | Street light control system having a function of preventing the breakage of the led due to such a leakage current and electric surge voltage |
| CN205195233U (en) * | 2015-10-30 | 2016-04-27 | 灵宝金源矿业股份有限公司 | Power leakage protector |
| CN109831851A (en) * | 2019-03-28 | 2019-05-31 | 四川艾贝斯科技发展有限公司 | A kind of street lamp single-lamp control system and control method |
| CN214412257U (en) * | 2021-01-04 | 2021-10-15 | 浙江苏泊尔热水器有限公司 | Electric leakage protection device and electric appliance |
| US20220330402A1 (en) * | 2021-04-13 | 2022-10-13 | Shenzhen Angui Technology Co., Ltd. | Dimming regulated power supply module and led dimming device |
| CN116209119A (en) * | 2023-03-21 | 2023-06-02 | 珠海市圣昌电子有限公司 | DALI dimming power supply load detection circuit and method |
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