CN210518933U - LED emergency control circuit suitable for commercial power disconnection condition - Google Patents
LED emergency control circuit suitable for commercial power disconnection condition Download PDFInfo
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- CN210518933U CN210518933U CN201921356260.7U CN201921356260U CN210518933U CN 210518933 U CN210518933 U CN 210518933U CN 201921356260 U CN201921356260 U CN 201921356260U CN 210518933 U CN210518933 U CN 210518933U
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Abstract
The utility model discloses a LED emergency control circuit suitable for commercial power disconnection condition compares in the conventional art, and the first transformer of accessible charges charging and discharging circuit when the commercial power is normal, makes the battery can remain sufficient electric quantity, when meetting the special case of commercial power disconnection, charging and discharging circuit discharges for emergent supply circuit receives the electric energy of battery, thereby can provide LED realization emergency lighting. Therefore, the utility model discloses simple structure, low cost, reasonable in design then charges the battery when launching the commercial power, discharges with drive LED by the battery when the commercial power breaks off, can play emergency lighting's effect, to the user, is favorable to promoting its use and experiences.
Description
Technical Field
The utility model belongs to the technical field of emergency control and specifically relates to a LED emergency control circuit suitable for the commercial power disconnection condition.
Background
At present, a direct current power supply is generally adopted for supplying power to common LED lamps in the market, when a mains supply is started, alternating current is input, direct current is output after conversion, then an LED light source is started to realize mains supply illumination, but the LED lamps do not have the function of emergency illumination, once the mains supply is suddenly disconnected due to various special events, the LED lamps cannot continue normal illumination, and great inconvenience is brought to users.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model aims at providing a LED emergency control circuit suitable for the commercial power disconnection condition can provide emergent electric power illumination for LED under the commercial power disconnection condition, to the user, is favorable to promoting its use and experiences.
In order to compensate the deficiency of the prior art, the embodiment of the utility model provides an adopt technical scheme is:
an LED emergency control circuit suitable for a mains supply disconnection condition comprises a first transformer, a charging and discharging circuit and an emergency power supply circuit, wherein the charging and discharging circuit comprises a first triode, a fourth triode, a first resistor, a second resistor, a third resistor, a first diode and a battery;
the light receiving part of the optical coupler is a phototriode, and the base of the phototriode is a light sensing end; a primary coil of the first transformer is connected to an output end of commercial power, and a secondary coil of the first transformer is respectively connected to a base electrode of the first triode and a collector electrode of the fourth triode; the emitter of the first triode is respectively connected to one end of a third resistor and the cathode of the first diode, the collector of the first triode is connected to the collector of the phototriode, the other end of the third resistor is connected to the base of the first triode and is also connected to the collector of the fourth triode through the second resistor, and the anode of the first diode is connected to the battery; the first resistor is connected between the emitter and the base of the fourth triode, and the base of the fourth triode is connected to the emitter of the phototriode through the fourth resistor;
the light emitting part of the optical coupler is connected to the LED voltage end of the mains supply through a sixth resistor and the second diode which are connected in series; the base electrode of the second triode is connected to the secondary coil of the second transformer, the base electrode of the third triode is connected to the collector electrode of the phototriode through the fifth resistor, the collector electrode of the second triode and the collector electrode of the third triode are connected to the first capacitor and the second capacitor which are connected in parallel, and the emitter electrode of the second triode and the emitter electrode of the third triode are connected to the reference ground; the fifth resistor is connected to the secondary coil of the second transformer.
Further, the first triode is a PNP type triode, and the second triode, the third triode and the fourth triode are NPN type triodes.
Further, the optical coupler adopts a PC817 chip.
Further, the first triode adopts an SS8550 chip, and the fourth triode adopts an SS8050 chip.
Furthermore, the second triode and the third triode both adopt D882 chips.
The embodiment of the utility model provides an in one or more technical scheme, following beneficial effect has at least: the charging and discharging circuit can be charged by the first transformer when the commercial power is normal, so that the battery can retain enough electric quantity, and when the commercial power is disconnected, the charging and discharging circuit discharges electricity, so that the emergency power supply circuit receives the electric energy of the battery, and the emergency lighting can be provided for the LED. Therefore, the utility model discloses simple structure, low cost, reasonable in design then charges the battery when launching the commercial power, discharges with drive LED by the battery when the commercial power breaks off, can play emergency lighting's effect, to the user, is favorable to promoting its use and experiences.
Drawings
The following description of the preferred embodiments of the present invention will be made with reference to the accompanying drawings.
Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, an embodiment of the present invention provides an LED emergency control circuit suitable for a commercial power disconnection situation, including a first transformer T1, a charge-discharge circuit 100 and an emergency power supply circuit 200, where the charge-discharge circuit 100 includes a first triode Q1, a fourth triode Q4, a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1 and a battery BAT, and the emergency power supply circuit 200 includes an optocoupler QC1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a second triode Q2, a third triode Q3, a second transformer T2, a first capacitor C1, a second capacitor C2 and a second diode D2;
the light receiving part of the optocoupler QC1 is a phototriode Q5, and the base electrode of the phototriode Q5 is a photosensitive end; a primary coil of the first transformer T1 is connected to an output terminal of a commercial power, and a secondary coil of the first transformer T1 is respectively connected to a base of the first transistor Q1 and a collector of the fourth transistor Q4; the emitter of the first transistor Q1 is connected to one end of a third resistor R3 and the cathode of the first diode D1, respectively, the collector of the first transistor Q1 is connected to the collector of the photo-transistor Q5, the other end of the third resistor R3 is connected to the base of the first transistor Q1 and also to the collector of the fourth transistor Q4 through the second resistor R2, and the anode of the first diode D1 is connected to the battery BAT; the first resistor R1 is connected between the emitter and the base of the fourth triode Q4, and the base of the fourth triode Q4 is connected to the emitter of the photo-transistor Q5 through the fourth resistor R4;
the light emitting part of the optocoupler QC1 is connected to the LED voltage end of the mains supply through a sixth resistor R6 and the second diode D2 which are connected in series; the base of the second transistor Q2 is connected to the secondary winding of the second transformer T2, the base of the third transistor Q3 is connected to the collector of the photo transistor Q5 through the fifth resistor R5, the collectors of the second transistor Q2 and the third transistor Q3 are connected to the first capacitor C1 and the second capacitor C2 which are connected in parallel, and the emitter of the second transistor Q2 and the emitter of the third transistor Q3 are connected to the ground reference; the fifth resistor R5 is connected to the secondary winding of the second transformer T2.
In this embodiment, when the utility power is normal, the charging and discharging circuit 100 is charged by the first transformer T1, so that the battery BAT can retain enough electric quantity, and when meeting the special condition of the utility power disconnection, the charging and discharging circuit 100 discharges, so that the emergency power supply circuit 200 receives the electric energy of the battery BAT, and thereby the emergency lighting can be provided for the LED. Therefore, the utility model discloses simple structure, low cost, reasonable in design then charges battery BAT when launching the commercial power, discharges with drive LED by battery BAT when the commercial power disconnection, can play emergency lighting's effect, to the user, is favorable to promoting its use and experiences.
Specifically, "P1" in fig. 1 indicates a terminal connected to the commercial power, and in practice, the terminal may be a plug-in unit or a structure similar to the structure capable of providing the commercial power, and since the commercial power is a basic concept and is not the inventive content of the embodiment, the description thereof is omitted; the first transformer T1 can transmit the commercial power to the first transistor Q1 and the fourth transistor Q4, i.e. the collector of the first transistor Q1 is used to supply the electric power to the battery BAT, so as to realize charging, and at the same time, the fourth transistor Q4 is provided with a bias voltage, in this process, the second resistor R2 and the third resistor R3 play a role in voltage stabilization and conduction, the first diode D1 can suppress the overvoltage, so as to prevent the battery BAT from being burned out during charging, and the first resistor R1 is used to provide the bias voltage for the base of the fourth transistor Q4.
In a normal state of the mains supply, the charging and discharging circuit 100 is in a charging state, the second triode Q2 and the third triode Q3 are not conducted, and the mains supply is used for driving the LEDs; in the state that the commercial power is cut off, the collector of the first transistor Q1 and the base of the fourth transistor Q4 are discharged, so that the second transistor Q2 and the third transistor Q3 are conducted by the voltage conduction of the second transformer T2, the second transformer T2 pulse-inverts the battery BAT voltage, according to Lenz law, the primary coil generates an excitation current, the secondary coil outputs a voltage amplified by a corresponding multiple according to the turn ratio for emergency use of the LED, the optical coupler QC1 converts an electric signal into electricity-light-electricity for stably outputting voltage for emergency use of the LED in a one-way mode, the first capacitor C1 and the second capacitor C2 both play a role in filtering the voltage of the battery BAT, the fourth resistor R4 and the fifth resistor R5 are both used for receiving the voltage of the battery BAT, the sixth resistor R6 is matched with the second diode D2 to play a role in outputting voltage stabilization, and the second diode D2 preferably adopts a voltage stabilizing diode.
Further, referring to fig. 1, another embodiment of the utility model provides a LED emergency control circuit suitable for the commercial power disconnection condition still, wherein, first triode Q1 adopts PNP type triode, second triode Q2 third triode Q3 with fourth triode Q4 all adopts NPN type triode. In the present embodiment, this arrangement enables more stable output of the mains voltage to the battery BAT, while achieving discharge output of the battery BAT voltage, which is based on the experience of the inventors.
Further, referring to fig. 1, another embodiment of the present invention further provides an LED emergency control circuit suitable for a commercial power disconnection condition, wherein the optocoupler QC1 adopts a PC817 chip. In this embodiment, the PC817 photoelectric coupler can completely isolate the front end thereof from the load, which is beneficial to increase safety, reduce circuit interference and simplify circuit design, and is adapted to the emergency power supply circuit 200 of this embodiment.
Further, referring to fig. 1, another embodiment of the present invention further provides an LED emergency control circuit suitable for a commercial power disconnection condition, wherein the first triode Q1 adopts an SS8550 chip, and the fourth triode Q4 adopts an SS8050 chip. In the present embodiment, the SS8550 chip and the SS8050 chip have low cost, are easy to obtain, have stable performance, and are adapted to the charging and discharging circuit 100 of the present embodiment.
Further, referring to fig. 1, another embodiment of the present invention further provides an LED emergency control circuit suitable for a commercial power disconnection situation, wherein the second triode Q2 and the third triode Q3 all adopt a D882 chip. In this embodiment, the D882 chip is low in cost, easy to obtain, stable in performance, and is adapted to the emergency power supply circuit 200 of this embodiment.
While the preferred embodiment and basic principles of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is intended to cover various modifications, equivalents and alternatives falling within the scope of the invention as claimed.
Claims (5)
1. The utility model provides a LED emergency control circuit suitable for commercial power disconnection condition which characterized in that:
the emergency power supply circuit comprises an optocoupler, a fourth resistor, a fifth resistor, a sixth resistor, a second triode, a third triode, a second transformer, a first capacitor, a second capacitor and a second diode;
the light receiving part of the optical coupler is a phototriode, and the base of the phototriode is a light sensing end; a primary coil of the first transformer is connected to an output end of commercial power, and a secondary coil of the first transformer is respectively connected to a base electrode of the first triode and a collector electrode of the fourth triode; the emitter of the first triode is respectively connected to one end of a third resistor and the cathode of the first diode, the collector of the first triode is connected to the collector of the phototriode, the other end of the third resistor is connected to the base of the first triode and is also connected to the collector of the fourth triode through the second resistor, and the anode of the first diode is connected to the battery; the first resistor is connected between the emitter and the base of the fourth triode, and the base of the fourth triode is connected to the emitter of the phototriode through the fourth resistor;
the light emitting part of the optical coupler is connected to the LED voltage end of the mains supply through a sixth resistor and the second diode which are connected in series; the base electrode of the second triode is connected to the secondary coil of the second transformer, the base electrode of the third triode is connected to the collector electrode of the phototriode through the fifth resistor, the collector electrode of the second triode and the collector electrode of the third triode are connected to the first capacitor and the second capacitor which are connected in parallel, and the emitter electrode of the second triode and the emitter electrode of the third triode are connected to the reference ground; the fifth resistor is connected to the secondary coil of the second transformer.
2. The LED emergency control circuit applicable to the commercial power off condition according to claim 1, wherein: the first triode adopts a PNP type triode, and the second triode, the third triode and the fourth triode all adopt NPN type triodes.
3. The LED emergency control circuit applicable to the commercial power off condition according to claim 1, wherein: the optical coupler adopts a PC817 chip.
4. An LED emergency control circuit adapted for use in a mains-off situation according to claim 1 or 2, wherein: the first triode adopts an SS8550 chip, and the fourth triode adopts an SS8050 chip.
5. An LED emergency control circuit adapted for use in a mains-off situation according to claim 1 or 2, wherein: and the second triode and the third triode both adopt D882 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356260.7U CN210518933U (en) | 2019-08-20 | 2019-08-20 | LED emergency control circuit suitable for commercial power disconnection condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356260.7U CN210518933U (en) | 2019-08-20 | 2019-08-20 | LED emergency control circuit suitable for commercial power disconnection condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210518933U true CN210518933U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921356260.7U Active CN210518933U (en) | 2019-08-20 | 2019-08-20 | LED emergency control circuit suitable for commercial power disconnection condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210518933U (en) |
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2019
- 2019-08-20 CN CN201921356260.7U patent/CN210518933U/en active Active
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Address after: Room 4120 and 4121, building 2, Jiangmen Wanda Plaza, Pengjiang district, Jiangmen City, Guangdong Province Patentee after: Jiangmen Jiaquan Intellectual Property Operation Co., Ltd Address before: Room 4120 and 4121, building 2, Jiangmen Wanda Plaza, Pengjiang district, Jiangmen City, Guangdong Province Patentee before: Jiangmen Jiaquan Technology Information Consulting Co.,Ltd. |
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