CN210694421U - LED lamp leakage current protection device driven by electronic ballast - Google Patents
LED lamp leakage current protection device driven by electronic ballast Download PDFInfo
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- CN210694421U CN210694421U CN201921895089.7U CN201921895089U CN210694421U CN 210694421 U CN210694421 U CN 210694421U CN 201921895089 U CN201921895089 U CN 201921895089U CN 210694421 U CN210694421 U CN 210694421U
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Abstract
The utility model provides an electronic ballast driven LED lamp leakage current protection device, include: the lamp filament equivalent module, the rectifying module and the leakage current protection module; the input end of the filament equivalent module is connected with two groups of output ends of the electronic ballast, the output end of the filament equivalent module is connected with the input end of the rectifier module, the output end of the rectifier module is connected with the output end of the leakage current protection module, and the output end of the leakage current protection module is connected with the input end of the LED light-emitting module. The utility model can not work normally under power frequency environment, the leakage current of the whole LED lamp tube is far lower than the allowable value, and the human body can not be damaged by small current when contacting the lamp tube; under the high-frequency environment that the electronic ballast normally works, the LED light-emitting module obtains constant current drive, and the LED lamp tube normally works.
Description
Technical Field
The utility model relates to a LED lighting system especially relates to an electronic ballast drives LED's lamp leakage current protection device.
Background
The LED has the characteristics of energy and power saving, environmental protection, long service life, small volume, rich colors, flexible combination, strong anti-vibration capability, no noise and the like. LED lamps currently belong to one of the well-recognized green light sources and have penetrated the market completely. With the popularization of LED technology, the LED lamp greatly enriches the lamp market, so that the functions of the lamp are diversified, and LED lamp tubes driven by electronic ballasts are common in the market.
The social productivity is developed, the living standard of people is continuously improved, the types and the number of the LED lamps which need to be used are also sharply increased, the power utilization range is gradually widened, the power utilization safety becomes more important, and when the LED lamp tube is installed, the electric shock caused by improper installation mode is easy to occur, so that how to design a leakage current protection device additionally arranged in the LED lamp tube becomes a problem which needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an electronic ballast-driven LED lamp leakage current protection device, which is used to solve the problem of electric shock caused by improper installation manner when an LED lamp tube is installed in the prior art.
In order to achieve the above objects and other related objects, the present invention provides an electronic ballast driven LED lamp leakage current protection device, including: the lamp filament equivalent module, the rectifying module and the leakage current protection module;
the input end of the filament equivalent module is connected with two groups of output ends of the electronic ballast, the output end of the filament equivalent module is connected with the input end of the rectifier module, the output end of the rectifier module is connected with the input end of the leakage current protection module, and the output end of the leakage current protection module is connected with the input end of the LED light-emitting module.
In an embodiment of the present invention, the filament equivalent module includes a resistor R1, a resistor R2, a capacitor C1, and a capacitor C2;
the resistor R1 is connected in parallel with the capacitor C1, and the two ends after being connected in parallel are connected in series between a group of output ends of the electronic ballast and also connected in series between the first input ends of the rectifier modules;
the resistor R2 is connected in parallel with the capacitor C2, and the two ends of the parallel connection are connected in series between the other group of output ends of the electronic ballast and also connected in series between the second input ends of the rectifier modules.
In an embodiment of the present invention, the rectifier module includes a rectifier bridge D1 and a rectifier bridge D2;
the alternating current input end of the rectifier bridge D1 is a first input end, the first input end is connected with the parallel connection end of the resistor R1 and the capacitor C1 of the filament equivalent module, the positive electrode output end of the rectifier bridge D1 is connected with the input end of the leakage current protection module, and the negative electrode output end of the rectifier bridge D1 is grounded;
the alternating current input end of the rectifier bridge D2 is a second input end, the second input end is connected with the parallel connection end of the resistor R2 and the capacitor C2 of the filament equivalent module, the positive electrode output end of the rectifier bridge D2 is connected with the input end of the leakage current protection module, and the negative electrode output end of the rectifier bridge D2 is grounded.
In an embodiment of the present invention, the leakage current protection module includes a resistor R3, a resistor R4, a capacitor C3, and a thyristor Q1;
one end of a capacitor C3 is connected with the anode output end of the rectifying module and the anode of the silicon controlled rectifier Q1, the other end of a capacitor C3 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of a resistor R4 and the control electrode of the silicon controlled rectifier Q1, and the other end of the resistor R4 is connected with the cathode of the silicon controlled rectifier Q1 and the input end of the LED light-emitting module.
In an embodiment of the present invention, the LED lighting module includes a capacitor C4 and an LED assembly, and the LED lighting module includes a plurality of LEDs, and the plurality of LEDs are connected in series and/or in parallel.
In an embodiment of the present invention, the LED light emitting module is further connected in parallel with the capacitor C4, the positive terminal after being connected in parallel is connected to the output terminal of the leakage current protection module, and the negative terminal after being connected in parallel is grounded.
As above, the utility model discloses a LED lamp leakage current protection device of electronic ballast driven has following beneficial effect: under a power frequency environment, the controlled silicon Q1 is in a cut-off state, the LED light-emitting module cannot work normally, the leakage current of the whole LED lamp tube is far lower than an allowable value, and a human body cannot be damaged by tiny current when contacting the lamp tube; under the high-frequency environment that the electronic ballast normally works, the controlled silicon Q1 is in a conducting state, the filter capacitor C3 plays a role in filtering, the LED light-emitting module obtains constant-current driving, and the LED lamp tube normally works.
Drawings
Fig. 1 shows a schematic diagram of the circuit structure of the present invention.
Description of the element reference numerals
1. An electronic ballast; 2. a leakage current protection device; 3. LED light emitting module
201. A filament equivalent module; 202. a rectification module; 203. and a leakage current protection module.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
Referring to fig. 1, an output terminal of an electronic ballast 1 is connected to an input terminal of a leakage current protection device 2, an output terminal of the leakage current protection device 2 is connected to an input terminal of an LED light emitting module 3, and the leakage current protection device 2 includes: a filament equivalent module 201, a rectifying module 202 and a leakage current protection module 203;
the input end of the electronic ballast 1 is connected with an alternating current power supply, and the output end is connected with the input end of the filament equivalent module 201 through two groups of output wires; the output end of the filament equivalent module 201 is connected with the input end of the rectifying module 202, the output end of the rectifying module 202 is connected with the input end of the leakage current protection module 203, and the output end of the leakage current protection module 203 is connected with the input end of the LED light-emitting module 3.
The filament equivalent module 201 comprises a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2; the resistor R1 and the resistor R2 are equivalent resistors of the filament, and the capacitor C1 and the capacitor C2 are bypass capacitors for filtering out high-frequency noise in the circuit.
The rectifier module 202 includes a rectifier bridge D1 and a rectifier bridge D2, and converts the two sets of ac power output by the electronic ballast 1 into dc power.
The leakage current protection module 203 comprises a resistor R3, a resistor R4, a capacitor C3 and a thyristor Q1;
the LED light-emitting module 3 comprises a plurality of light-emitting diodes which are connected in series and/or in parallel, and the specification and the number of the light-emitting diodes and the serial and/or parallel number of the light-emitting diodes are determined according to the specification requirement of the lamp tube.
The LED lighting module 3 is connected in parallel with the capacitor C4.
The capacitor C3 plays a role in isolating low-frequency current, the resistor R3 and the resistor R4 form a voltage division circuit, and the voltage division ratio of the resistor R3 and the resistor R4 is reasonably set, so that under a power frequency environment, the voltage at two ends of the voltage division resistor R4 is lower than the trigger voltage of the silicon controlled rectifier Q1, the silicon controlled rectifier Q1 is in a cut-off state, the LED light-emitting module 3 cannot normally work, the resistance value of the voltage division circuit is very large, the leakage current of the whole LED lamp tube is far lower than an allowable value, and a human body cannot be damaged by tiny current when contacting the lamp; under the high-frequency environment that the electronic ballast 1 normally works, the voltage at the two ends of the voltage-dividing resistor R4 is higher than the trigger voltage of the controlled silicon Q1, the controlled silicon Q1 is in a conducting state, the LED light-emitting module 3 is driven by constant current, and the LED lamp tube normally works.
When the controlled silicon Q1 switches on, the filter capacitor C4 plays a role in filtering, so that voltage ripple wave crests at two ends of the LED light-emitting module 3 are gentle and work normally.
To sum up, the utility model has the advantages that under the power frequency environment, the thyristor Q1 is in the cut-off state, the LED light emitting module can not work normally, the leakage current of the whole LED lamp tube is far lower than the allowable value, and the human body can not be damaged by small current when contacting the lamp tube; under the high-frequency environment that the electronic ballast normally works, the controlled silicon Q1 is in a conducting state, the filter capacitor C3 plays a role in filtering, the LED light-emitting module obtains constant-current driving, and the LED lamp tube normally works. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. An electronic ballast driven LED lamp leakage current protection device, comprising: the lamp filament equivalent module, the rectifying module and the leakage current protection module;
the input end of the filament equivalent module is connected with two groups of output ends of the electronic ballast, the output end of the filament equivalent module is connected with the input end of the rectifier module, the output end of the rectifier module is connected with the input end of the leakage current protection module, and the output end of the leakage current protection module is connected with the input end of the LED light-emitting module.
2. The electronic ballast driven LED lamp leakage current protection device according to claim 1, wherein: the filament equivalent module comprises a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2;
the resistor R1 is connected in parallel with the capacitor C1, and the two ends after being connected in parallel are connected in series between a group of output ends of the electronic ballast and also connected in series between the first input ends of the rectifier modules;
the resistor R2 is connected in parallel with the capacitor C2, and the two ends of the parallel connection are connected in series between the other group of output ends of the electronic ballast and also connected in series between the second input ends of the rectifier modules.
3. The electronic ballast driven LED lamp leakage current protection device according to claim 2, wherein: the rectifying module comprises a rectifying bridge D1 and a rectifying bridge D2;
the alternating current input end of the rectifier bridge D1 is a first input end, the first input end is connected with the parallel connection end of the resistor R1 and the capacitor C1 of the filament equivalent module, the positive electrode output end of the rectifier bridge D1 is connected with the input end of the leakage current protection module, and the negative electrode output end of the rectifier bridge D1 is grounded;
the alternating current input end of the rectifier bridge D2 is a second input end, the second input end is connected with the parallel connection end of the resistor R2 and the capacitor C2 of the filament equivalent module, the positive electrode output end of the rectifier bridge D2 is connected with the input end of the leakage current protection module, and the negative electrode output end of the rectifier bridge D2 is grounded.
4. The electronic ballast driven LED lamp leakage current protection device according to claim 1, wherein: the leakage current protection module comprises a resistor R3, a resistor R4, a capacitor C3 and a controlled silicon Q1;
one end of a capacitor C3 is connected with the anode output end of the rectifying module and the anode of the silicon controlled rectifier Q1, the other end of a capacitor C3 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of a resistor R4 and the control electrode of the silicon controlled rectifier Q1, and the other end of the resistor R4 is connected with the cathode of the silicon controlled rectifier Q1 and the input end of the LED light-emitting module.
5. The electronic ballast driven LED lamp leakage current protection device according to claim 1, wherein: the LED light-emitting module comprises a plurality of light-emitting diodes which are connected in series and/or in parallel.
6. The electronic ballast driven LED lamp leakage current protection device according to claim 5, wherein:
the LED light-emitting module is further connected with a capacitor C4 in parallel, the positive end after the parallel connection is connected with the output end of the leakage current protection module, and the negative end after the parallel connection is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921895089.7U CN210694421U (en) | 2019-10-31 | 2019-10-31 | LED lamp leakage current protection device driven by electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921895089.7U CN210694421U (en) | 2019-10-31 | 2019-10-31 | LED lamp leakage current protection device driven by electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210694421U true CN210694421U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921895089.7U Active CN210694421U (en) | 2019-10-31 | 2019-10-31 | LED lamp leakage current protection device driven by electronic ballast |
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| Country | Link |
|---|---|
| CN (1) | CN210694421U (en) |
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2019
- 2019-10-31 CN CN201921895089.7U patent/CN210694421U/en active Active
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