CN210609786U - Current-limiting electronic rectifier and lamp tube with same - Google Patents
Current-limiting electronic rectifier and lamp tube with same Download PDFInfo
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- CN210609786U CN210609786U CN201920371245.3U CN201920371245U CN210609786U CN 210609786 U CN210609786 U CN 210609786U CN 201920371245 U CN201920371245 U CN 201920371245U CN 210609786 U CN210609786 U CN 210609786U
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Abstract
The utility model discloses a current-limiting type electronic rectifier and have this current-limiting type electronic rectifier's fluorescent tube, the fluorescent tube includes casing, current-limiting type electronic rectifier and LED module, the casing of fluorescent tube is connected with alternating current power supply, current-limiting type electronic rectifier includes safety protection electric leakage perception module and drive module and sets up in this casing and is connected with the power, drive module is equipped with power output current limiting unit, and power output current limiting unit is connected with safety protection electric leakage perception module electricity respectively, the LED module sets up in the casing of fluorescent tube and is connected with the electricity; when the LED lamp tube is used, whether the alternating current power supply leaks electricity or not is detected through the safety protection electric leakage sensing module, and the power supply output current limiting unit limits output signals so as to avoid exceeding the capacity of the LED module and achieve the purposes of preventing the electric leakage and prolonging the service life of the lamp tube and the LED module.
Description
Technical Field
The present invention relates to an electronic rectifier and a lamp tube, and more particularly to a current-limiting electronic rectifier and a lamp tube having the same.
Background
The science and technology are changing day by day, and lamps in the market at present no longer use traditional fluorescent tubes as the mainstream, and consumers are the LED fluorescent tubes that need to save energy and electricity all generally use.
In the prior art, LED lamps are classified into a type a (TypeA), a type B (TypeB), a type C (TypeC), and a + B (TypeA + B), wherein the type a (TypeA) does not require to change the structure and wiring of the lamp when the lamp is replaced, and can be directly replaced with conventional T5 and T8 fluorescent lamps; a type B (TypeB) lamp differs from a type a (TypeA) lamp in that the circuit inside the lamp needs to be changed when the lamp is installed; the C-type (TypeC) lamp tube is driven by a direct current power supply, and a ballast in the lamp needs to be replaced when the lamp tube is installed; a + B type (TypeA + B) lamp tube can be compatible with a ballast and allows direct feeding work of alternating current, so that the structure and the circuit of the lamp do not need to be changed when the lamp tube is replaced.
However, in the prior art, the output current of the class a + B (type a + B) lamp tube in the type a mode is not constant, so that the current of different ballasts is not controlled, especially in the high-output ballast, if the current exceeds the tolerance of the LED, not only the safety is affected, but also the service life of the LED is affected, and therefore, how to improve the safety and prolong the service life of the class a + B (type a + B) lamp tube does not need to provide the necessity of a more solution.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned prior art, the main object of the present invention is to provide a current-limiting electronic rectifier and a lamp tube having the same, which has an upper limit for limiting current output, avoids exceeding the bearable specification, prevents leakage, and prolongs the service life.
The main technical means adopted to achieve the above purpose is to make the current-limiting type electronic rectifier include:
the safety protection electric leakage sensing module is used for being connected with a power supply;
the driving module is electrically connected with the safety protection electric leakage sensing module and is provided with a power output current limiting unit which is electrically connected with the safety protection electric leakage sensing module;
the power output current limiting unit detects the output signal of the power supply, and when the output signal of the power supply exceeds a reference signal, the output signal of the power supply is limited in real time.
According to the structure, the safety protection electric leakage sensing module is arranged at an alternating current power supply end and connected with a power supply, the safety protection electric leakage sensing module can detect whether the alternating current power supply leaks electricity or not and drive an LED module to emit light through the driving module, the power supply output current limiting unit of the driving module continuously detects output signals of the power supply, when the output signals of the power supply exceed the reference signals, the output signals of the power supply are limited in real time, the output signals can be prevented from exceeding the range which can be borne by the LED module, and the purposes of preventing the electric leakage and prolonging the service life are achieved.
Another main technical means for achieving the above object is to make the lamp tube include:
a shell of the lamp tube for connecting with an alternating current power supply;
the safety protection electric leakage sensing module is arranged in the shell and is connected with a power supply;
the LED module is arranged in the shell;
the driving module is respectively electrically connected with the safety protection electric leakage sensing module and the LED module, and is further provided with a power output current limiting unit which is electrically connected with the safety protection electric leakage sensing module;
the power output current limiting unit detects the output signal of the power supply, and when the output signal of the power supply exceeds a reference signal, the output signal of the power supply is limited in real time.
According to the structure, the safety protection leakage sensing module, the driving module and the LED module are arranged in the shell of the lamp tube, the safety protection leakage sensing module receives an output signal of a power supply and detects whether the power supply leaks electricity or not, the LED module is driven to emit light through the driving module, the power supply output current limiting unit of the driving module continuously detects the output signal of the power supply, when the output signal of the power supply exceeds the reference signal, the output signal of the power supply is limited in real time, the output signal is prevented from exceeding the range which the LED module can bear, and the purposes of preventing leakage and prolonging the service life are achieved.
Preferably, the driving module is a driving module having a TypeA + B circuit, and the power output current limiting unit is arranged under the TypeA circuit of the driving module to limit the maximum current.
Preferably, the safety protection leakage sensing module comprises a rectifier, and the rectifier is connected with a power supply.
Preferably, the power output current limiting unit further includes a voltage input unit, a filter, a reference signal sampling circuit, a comparator and a switch unit, wherein the comparator has a plurality of pins, and the filter, the reference signal sampling circuit and the switch unit are connected through the plurality of pins.
Preferably, the voltage input unit is connected to the filter and provides a voltage drop signal, which is filtered by the filter and provides a filtered signal to the comparator; the reference signal sampling circuit provides a reference signal to the comparator to serve as a reference signal of the power supply output current limiting unit.
Preferably, when the comparator receives the filtered signal sent by the filter and the reference signal provided by the reference signal sampling circuit, the comparator outputs a control signal to the switching unit according to the filtered signal exceeding the reference signal, and when the switching unit is turned on, the waveform of the input voltage is reduced or part of the voltage is cut off to limit the output current. Preferably, the switching unit includes a MOS switch, and the MOS switch is connected to the rectifier of the safety protection leakage sensing module.
Preferably, the voltage input unit is formed by connecting a first resistor and a second resistor in parallel; the filter is formed by connecting a third resistor with a first capacitor in series, and the serial connection point of the third resistor and the first capacitor is connected with the comparator; the reference signal sampling circuit is composed of a fourth resistor, a fifth resistor, a sixth resistor, a diode and a second capacitor, wherein the comparator is respectively connected with the serial connection point of the fourth resistor and the second capacitor and the serial connection point of the fifth resistor and the diode, and the comparator is connected with the voltage division point of the fifth resistor and the sixth resistor.
Preferably, the LED module is composed of a plurality of LEDs.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention.
Wherein the content of the first and second substances,
fig. 1 is a block diagram of a lamp tube structure according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a state of application of a limited output signal according to a preferred embodiment of the present invention;
FIG. 3 is a circuit diagram of a lamp according to a preferred embodiment of the present invention;
fig. 4 is a circuit diagram of a driving module according to a preferred embodiment of the present invention.
Description of reference numerals:
10 AC power supply
20 casing
21 safety protection electric leakage sensing module
22 drive module
221 power supply output current limiting unit
23 LED module.
Detailed Description
The following description will be made in conjunction with the accompanying drawings and the preferred embodiments of the present invention to further illustrate the technical means adopted to achieve the objects of the present invention.
Referring to fig. 1, 2 and 3, a casing 20 is connected to an ac power supply (N, L)10, and a current-limiting electronic rectifier is disposed in the casing 20 for converting an input ac power signal into a DC output signal DC and limiting the output signal under the control of the current-limiting electronic rectifier.
The current-limiting electronic rectifier comprises a safety protection leakage sensing module 21 and a driving module 22, wherein the safety protection leakage sensing module 21 receives an output signal of a power supply and detects whether the power supply has leakage, the driving module 22 is electrically connected with the safety protection leakage sensing module 21 and drives an LED module in the shell 20 to emit light according to the output signal, and in the preferred embodiment, the LED module can be composed of more than one or a plurality of LEDs, so that the shell 20 is an LED lamp tube; the driving module 22 is a driving module having a TypeA + B circuit.
The driving module 22 is further provided with a power output current limiting unit 221, the power output current limiting unit 221 is electrically connected with the safety protection leakage sensing module 21, the power output current limiting unit 221 detects an output signal of the power, and when the output signal of the power exceeds a reference signal, the output signal of the power is limited in real time.
As shown in fig. 2, the power output current limiting unit 221 cuts the waveform of the input voltage by a partial voltage S1 to limit the output current, or cuts the waveform of the input voltage by a partial voltage S2 to limit the output current. When the power output current-limiting unit 221 continuously detects the output signal of the power and the output signal of the power exceeds the reference signal, the power output current-limiting unit 221 limits the output signal of the power in real time to avoid exceeding the tolerable range of the light-emitting module, thereby increasing the safety.
Referring to fig. 3 and 4, in the preferred embodiment, the leakage sensing module 21 includes a rectifier DB, which is connected to the ac power supply (N, L)10 and converts the input ac power signal into a DC output signal DC.
As shown in fig. 4, in the preferred embodiment, the power output current limiting unit 221 is disposed under the TypeA circuit of the driving module 22 to limit the maximum current, the power output current limiting unit 221 further includes a voltage input unit (R17, R25), a filter (R18, C11), a reference signal sampling circuit (R20, R21, R22, D6, C10), a comparator (IC2), and a switch unit (Q4), the comparator (IC2) has a plurality of pins (1-8), and the filter (R18, C11), the reference signal sampling circuit (R20, R21, R22, D6, C10, V +,12V), and the switch unit (Q4) are connected through the plurality of pins.
In the preferred embodiment, the voltage input unit (R17, R25) is disposed on a power circuit of the TypeA circuit of the driving module 22 and connected to the filter (R18, C11), the voltage input unit (R17, R25) provides a voltage drop signal to the filter (R18, C11), the voltage drop signal is filtered by the filter (R18, C11) and a filtered signal is provided to the inverting input (pin 2) of the comparator (IC 2); meanwhile, the reference signal sampling circuit (R20, R21, R22, D6, C10, V +,12V) provides a reference signal to the non-inverting input terminal (pin 3 and pin 5) of the comparator (IC2) as a reference signal of the power output current limiting unit 221.
In the preferred embodiment, when the comparator (IC2) receives the filtered signal sent by the filter (R18, C11) and the reference signal provided by the reference signal sampling circuit (R20, R21, R22, D6, C10, V +,12V), the comparator (IC2) outputs a control signal (i.e., high) to the switch unit (Q4) according to the filtered signal exceeding the reference signal, and the control terminal (pin 7) of the comparator (IC2), in the preferred embodiment, the switch unit (Q4) includes a MOS (Metal oxide semiconductor) switch (Q4).
Furthermore, in the preferred embodiment, the voltage input unit (R17, R25) is formed by connecting a first resistor R17 and a second resistor R25 in parallel; the filter (R18, C11) is composed of a third resistor R18 connected in series with a first capacitor C11, and the series connection point of the third resistor R18 and the first capacitor C11 is connected with the pin 2 of the comparator (IC 2); the reference signal sampling circuit (R20, R21, R22, D6, C10) is composed of a fourth resistor R20, a fifth resistor R21, a sixth resistor R22, a diode D6 and a second capacitor C11, wherein a pin 5 of the comparator (IC2) is connected to a serial connection point of the fourth resistor R20 and the second capacitor C11, respectively, and a pin 3 of the comparator (IC2) is connected to voltage dividing points of the fifth resistor R21 and the sixth resistor R22 at a serial connection point of the fifth resistor R21 and the diode D6; the MOS switch (Q4) is connected to the signal output terminal of the rectifier DB of the safety protection leakage sensing module 21.
As shown in fig. 2, 3 and 4, when the MOS switch (Q4) is turned on, the waveform of the input voltage is cut off by the partial voltage S1 to limit the output current, or the waveform of the input voltage is cut off by the partial voltage S2 to limit the output current. When the power output current-limiting unit 221 continuously detects the output signal of the power and the output signal of the power exceeds the reference signal, the power output current-limiting unit 221 limits the output signal of the power in real time to avoid exceeding the tolerable range of the light-emitting module, thereby increasing the safety.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the equivalent embodiment without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (10)
1. A current-limiting electronic rectifier is characterized by comprising:
a safety protection leakage sensing module for connecting with power supply, an
And the driving module is electrically connected with the safety protection electric leakage sensing module and is provided with a power output current limiting unit which is electrically connected with the safety protection electric leakage sensing module.
2. The current-limiting electronic rectifier of claim 1, wherein the driving module is a driving module having a type a + B circuit, and the power output current-limiting unit is disposed under the type a circuit of the driving module to limit the maximum current.
3. The current-limiting electronic rectifier of claim 1 or 2, wherein the safety protection leakage sensing module comprises a rectifier, and the rectifier is connected with a power supply.
4. The current-limiting electronic rectifier of claim 3, wherein the current-limiting unit further comprises a voltage input unit, a filter, a reference signal sampling circuit, a comparator and a switch unit, the comparator has a plurality of pins, and the filter, the reference signal sampling circuit and the switch unit are connected through the plurality of pins.
5. The current-limiting electronic rectifier of claim 4 wherein the voltage input unit is connected to the filter and provides a voltage drop signal, which is filtered by the filter and provides a filtered signal to the comparator; the reference signal sampling circuit provides a reference signal to the comparator to serve as a reference signal of the power supply output current limiting unit.
6. The current-limiting electronic rectifier of claim 5, wherein when the comparator receives the filtered signal from the filter and the reference signal from the reference signal sampling circuit, the comparator outputs a control signal to the switch unit according to the filtered signal exceeding the reference signal, and when the switch unit is turned on, the comparator cuts off the waveform of the input voltage or cuts off a portion of the input voltage to limit the output current.
7. The current-limiting electronic rectifier of claim 6 wherein the switch unit comprises a MOS switch, the MOS switch being connected to the rectifier of the leakage-sensing module.
8. The current-limiting electronic rectifier according to claim 7, wherein the voltage input unit is formed by connecting a first resistor and a second resistor in parallel; the filter is formed by connecting a third resistor with a first capacitor in series, and the serial connection point of the third resistor and the first capacitor is connected with the comparator; the reference signal sampling circuit is composed of a fourth resistor, a fifth resistor, a sixth resistor, a diode and a second capacitor, wherein the comparator is respectively connected with the serial connection point of the fourth resistor and the second capacitor and the serial connection point of the fifth resistor and the diode, and the comparator is connected with the voltage division point of the fifth resistor and the sixth resistor.
9. A lamp, comprising:
a housing for connecting with an AC power source;
a current-limiting electronic rectifier disposed in the housing and connected to the power source, the current-limiting electronic rectifier being as claimed in claim 1;
and the LED module is arranged in the shell and is electrically connected with the current-limiting type electronic rectifier.
10. The lamp of claim 9, wherein the LED module is comprised of a plurality of LEDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920371245.3U CN210609786U (en) | 2019-03-22 | 2019-03-22 | Current-limiting electronic rectifier and lamp tube with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920371245.3U CN210609786U (en) | 2019-03-22 | 2019-03-22 | Current-limiting electronic rectifier and lamp tube with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210609786U true CN210609786U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920371245.3U Active CN210609786U (en) | 2019-03-22 | 2019-03-22 | Current-limiting electronic rectifier and lamp tube with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210609786U (en) |
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2019
- 2019-03-22 CN CN201920371245.3U patent/CN210609786U/en active Active
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