CN213817258U - Power supply protection circuit for street lamp control circuit - Google Patents
Power supply protection circuit for street lamp control circuit Download PDFInfo
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- CN213817258U CN213817258U CN202022083616.3U CN202022083616U CN213817258U CN 213817258 U CN213817258 U CN 213817258U CN 202022083616 U CN202022083616 U CN 202022083616U CN 213817258 U CN213817258 U CN 213817258U
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Abstract
The utility model provides a power protection circuit for street lamp control circuit, include: the system comprises a solar photovoltaic array, a photovoltaic controller, a solar storage battery, an undervoltage protection circuit and an overcurrent and overvoltage alarm circuit; the input end of the photovoltaic controller is connected with the output end of the solar photovoltaic array, the output end of the photovoltaic controller is connected with the input end of the solar storage battery, and the undervoltage protection circuit and the overcurrent and overvoltage alarm circuit are both connected with the solar storage battery; the undervoltage protection circuit includes auto-lock the control unit, switch tube control unit and voltage comparison unit, auto-lock the control unit, switch tube the control unit all with the voltage comparison unit electricity is connected, and the auto-lock the control unit includes the MCU controller, and the excessive pressure warning circuit that overflows is including overflowing excessive pressure suggestion unit and load isolation unit, the utility model discloses simple structure, cost are lower, and can play fine guard action to solar cell's overdischarge and the excessive pressure problem of overflowing.
Description
Technical Field
The utility model relates to a street lamp control technical field especially involves a power protection circuit for street lamp control circuit.
Background
Present be used for street lamp control circuit and control system to survey ambient light and then the automatic start-stop street lamp according to the sensor mostly, and novel energy-conserving street lamp all adopts pollution-free solar energy power supply, and need artifically go to the maintenance when power supply circuit breaks down, it is very inconvenient, design a reliable automation to power supply overcurrent overvoltage and overdischarge protection and can send the battery event condition to the protection circuit of long-range centralized control end, can greatly increased the life of battery and the safety of circuit.
In summary, how to provide a power protection circuit for a street lamp control circuit, which has a simple structure and a low cost and can well protect the problems of over-discharge and over-voltage and over-current of a solar storage battery, is a problem that needs to be solved urgently by a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problems and needs, the present invention provides a power protection circuit for a street lamp control circuit, which can solve the above technical problems due to the following technical solutions.
In order to achieve the above object, the utility model provides a following technical scheme: a power protection circuit for a street light control circuit, comprising: the system comprises a solar photovoltaic array, a photovoltaic controller, a solar storage battery, an undervoltage protection circuit and an overcurrent and overvoltage alarm circuit; the input end of the photovoltaic controller is connected with the output end of the solar photovoltaic array, the output end of the photovoltaic controller is connected with the input end of the solar storage battery, and the undervoltage protection circuit and the overcurrent and overvoltage alarm circuit are both connected with the solar storage battery; the undervoltage protection circuit comprises a self-locking control unit, a switch tube control unit and a voltage comparison unit, the self-locking control unit, the switch tube control unit and the voltage comparison unit are electrically connected, the self-locking control unit comprises an MCU (microprogrammed control Unit), the overcurrent and overvoltage alarm circuit comprises an overcurrent and overvoltage prompt unit and a load isolation unit, the overcurrent and overvoltage prompt unit is electrically connected with the load isolation unit, and the overcurrent and overvoltage prompt unit comprises a light-emitting diode D1 and a protection resistor R15.
Further, the device also comprises a communication module for remote communication, wherein the communication module is electrically connected with the MCU controller.
Furthermore, the communication module comprises a GSM module, and the GSM module adopts a JB35GD model.
Further, the switch tube control unit includes a PMOS tube Q2.
Furthermore, the voltage comparing unit includes a comparator U1, a reference voltage U2, a resistor R1 to a resistor R8, capacitors C1 to C4, and a transistor Q1, wherein one end of the resistor R1 is connected in parallel with the source of the PMOS transistor Q2 and then connected to the positive electrode of the solar battery, the other end of the resistor R1 is connected in parallel with one end of the capacitor C1 and one end of the resistor R2, the other end of the capacitor C1 is connected to ground, the other end of the resistor R1 is connected in parallel with the gate of the PMOS transistor Q1 and the collector of the transistor Q1, the emitter of the transistor Q1 is connected to ground, the base of the transistor Q1 is connected to the output end of the comparator U1 through the resistor R1, the drain of the PMOS transistor Q1 is connected in parallel with the positive electrode of the capacitor C1 and one end of the resistor R1, the negative electrode of the capacitor C1 is connected in parallel with the output end of the comparator U1, the other end of the resistor R5 is connected in parallel with the inverting input end of the comparator U1 and the output end of the reference voltage U2, the non-inverting input end of the comparator U1, one end of the resistor R7 and one end of the capacitor C4 are connected in parallel with one end of the resistor R6, the other end of the resistor R6 is connected in parallel with one end of the resistor R5 and then connected with the load output end, and the other end of the resistor R7 is connected in parallel with the other end of the capacitor C4 through the resistor R8 and then connected to the ground.
Further, the transistor Q1 is an NPN transistor, and the capacitor C2 is a polar capacitor.
Further, the load isolation unit comprises a 555 chip, a resistor R9-a resistor R14, a capacitor C5, a capacitor C6, a capacitor C7, a transistor Q3, a transistor Q4, a transistor Q5 and a zener diode D2, wherein the anode of the light emitting diode D1 is connected with a pin 3 of the 555 chip, the cathode of the light emitting diode D1 is connected with the cathode of the solar storage battery through the protection resistor R15, a pin 4 of the 555 chip is connected with the pin 8 in parallel and then connected with the anode of the solar storage battery, a pin 7 of the 555 chip is connected with the base of the transistor Q4 through the resistor R14 in parallel, the resistor R13 is connected between the base and the emitter of the transistor Q4 in parallel, the emitter of the transistor Q4 is connected with the pin 4 of the 555 chip in parallel, the collector of the transistor Q4 is connected with one end of the resistor R9 in parallel and then connected with the load output end, and the other end of the emitter of the transistor Q3 is connected with the other end of the resistor R465 through the resistor R10, One end of the resistor R11 is connected in parallel with one end of the resistor R12, a slide arm of the resistor R10 is connected with a negative electrode of the zener diode D2, an anode of the zener diode D2 is connected with a collector of the triode Q3, a collector of the triode Q3 is connected in parallel with a collector of the triode Q5 and one end of the capacitor C5 and then connected with a pin 6 of the 555 chip, the other end of the resistor R11 is connected with a base of the triode Q5, an emitter of the triode Q5, the other end of the resistor R12, the other end of the capacitor C5 and one end of the capacitor C6 are connected with a negative electrode of the solar storage battery, the other end of the capacitor C6 is connected with a pin 5 of the 555 chip, and the capacitor C7 is connected in parallel with two ends of the solar storage battery.
Further, the transistor Q3 and the transistor Q5 are both NPN transistors, the transistor Q4 is a PNP transistor, and the capacitor C7 is a polar capacitor.
The beneficial effects of the utility model are that, this a power protection circuit for street lamp control circuit simple structure, cost are lower, and can play fine guard action to solar cell's overdischarge and excessive pressure overcurrent problem, can keep apart the protection with load control circuit and supply circuit when the excessive pressure condition appears overflowing, then can turn-off automatically when the voltage is lower and prevent the overdischarge condition.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention are limited thereto.
Fig. 1 is the circuit interface schematic diagram of the main control driving circuit of the middle street lamp of the present invention.
Fig. 2 is a schematic diagram of a circuit interface of the middle voltage stabilizing circuit of the present invention.
Fig. 3 is a schematic diagram of a circuit interface of the medium voltage switching circuit according to the present invention.
Detailed Description
In order to make the technical solution of the present invention, its purpose, technical solution and advantages become clearer, the drawings of the embodiments of the present invention will be combined hereinafter, and the technical solution of the embodiments of the present invention will be clearly and completely described. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Referring to fig. 1 to 3, a power protection circuit for a street lamp control circuit includes: solar photovoltaic array, photovoltaic controller, solar battery, undervoltage protection circuit and overcurrent overvoltage alarm circuit still include the communication module that is used for remote communication, communication module with the MCU controller electricity is connected, communication module includes the GSM module, the GSM module adopts the model to be JB35GD, communication module is used for sending the fault type and the number of times that the circuit takes place to the long-range centralized control end of street lamp. The input end of the photovoltaic controller is connected with the output end of the solar photovoltaic array, the output end of the photovoltaic controller is connected with the input end of the solar storage battery, and the undervoltage protection circuit and the overcurrent and overvoltage alarm circuit are both connected with the solar storage battery; the undervoltage protection circuit includes auto-lock the control unit, switch tube control unit and voltage comparison unit, the auto-lock the control unit switch tube the control unit all with the voltage comparison unit electricity is connected, the auto-lock the control unit includes the MCU controller, it includes overflows excessive pressure suggestion unit and load isolation element to overflow the excessive pressure warning circuit, overflow the excessive pressure suggestion unit with the load isolation element electricity is connected, it includes emitting diode D1 and protective resistance R15 to overflow the excessive pressure suggestion unit, wherein, switch tube control unit includes PMOS pipe Q2.
As shown in fig. 2, the voltage comparing unit includes a comparator U1, a reference voltage U2, a resistor R1 to a resistor R8, capacitors C1 to C4, and a transistor Q1, one end of the resistor R1 is connected in parallel with the source of the PMOS transistor Q2 and then connected to the positive electrode of the solar battery, the other end of the resistor R1 is connected in parallel with one end of the capacitor C1 and one end of the resistor R2, the other end of the capacitor C1 is connected to ground, the other end of the resistor R1 is connected in parallel with the gate of the PMOS transistor Q1 and the collector of the transistor Q1, the emitter of the transistor Q1 is connected to ground, the base of the transistor Q1 is connected to the output end of the comparator U1 through the resistor R1, the drain of the PMOS transistor Q1 is connected in parallel with the positive electrode of the capacitor C1 and one end of the resistor R1, the negative electrode of the capacitor C1 is connected in parallel with the output end of the comparator U1, the other end of the resistor R5 is connected in parallel with the inverting input end of the comparator U1 and the output end of the reference voltage U2, the non-inverting input end of the comparator U1, one end of the resistor R7 and one end of the capacitor C4 are connected in parallel with one end of the resistor R6, the other end of the resistor R6 is connected in parallel with one end of the resistor R5 and then connected with the load output end, the other end of the resistor R7 is connected in parallel with the other end of the capacitor C4 through the resistor R8 and then connected to the ground, wherein the triode Q1 is an NPN type triode, and the capacitor C2 is a polar capacitor.
As shown in fig. 3, the load isolation unit includes a 555 chip, a resistor R9 to a resistor R14, a capacitor C5, a capacitor C6, a capacitor C7, a transistor Q3, a transistor Q4, a transistor Q5 and a zener diode D2, wherein an anode of the light emitting diode D1 is connected to a pin 3 of the 555 chip, a cathode of the light emitting diode D1 is connected to a cathode of the solar battery through the protection resistor R15, a pin 4 of the 555 chip is connected in parallel to a pin 8 and then connected to an anode of the solar battery, a pin 7 of the 555 chip is connected in parallel to a base of the transistor Q4 through the resistor R14, the resistor R13 is connected in parallel between the base and the emitter of the transistor Q4, an emitter of the transistor Q4 is connected in parallel to the pin 4 of the 555 chip, a collector of the transistor Q4 is connected in parallel to one end of the resistor R9 and then connected to a load output terminal, the other end of the resistor R9 is connected in parallel with the emitter of the triode Q3, one end of the resistor R11 and one end of the resistor R12 through the resistor R10, the slide arm of the resistor R10 is connected with the cathode of the zener diode D2, the anode of the zener diode D2 is connected with the collector of the triode Q3, the collector of the triode Q3 is connected in parallel with the collector of the triode Q5 and one end of the capacitor C5 and then connected with the pin 6 of the 555 chip, the other end of the resistor R11 is connected with the base of the triode Q5, the emitter of the triode Q5 is connected with the other end of the resistor R12, the other end of the capacitor C5 and one end of the capacitor C6 are connected with the cathode of the solar battery, the other end of the capacitor C6 is connected with the pin 5 of the chip, and the capacitor C7 is connected in parallel with the two ends of the solar battery, the triode Q3 and the triode Q5 are both NPN type triodes, the triode Q4 is a PNP type triode, and the capacitor C7 is a polar capacitor. During normal operation, Q3 and Q5 all cut off, 555 resets, discharge transistor in 555 switches on and draws current from Q4 base, make Q4 department open and saturate, the power just directly sends into the load, when the load draws current and exceeds the specified value, the voltage drop increases on the resistance R12, make Q5 switch on, 555 is triggered, then inside discharge transistor cuts off, and then Q4 also cuts off, keep apart power and load, 555 is in the monostable state at this moment, the monostable time is one, as long as load overcurrent phenomenon does not get rid of, 555 triggers again, Q4 continues to keep apart the load. If the load is in overvoltage, Q3 is conducted after R9, R10 and D1, 555 is triggered, and Q3 isolates the load at the moment.
In this embodiment, the PMOS corresponds to a contact of a relay, and is controlled by the output of the comparator. The inverting input end of the comparator is connected with reference voltage, the non-inverting input end of the comparator is connected with battery voltage division feedback, and when the PMOS is in a disconnected state, the battery cannot supply power outwards and is in a disconnected state; when the MCU is pressed down to give a control level, the comparator and the reference voltage source work, if the voltage of the battery is sufficient, the circuit enters self-locking, when the voltage is lower than a certain value, the comparator can output a low level, the PMOS is turned off, the circuit is disconnected, and the protection effect is achieved.
It should be noted that the embodiments of the present invention are only the preferred embodiments for implementing the present invention, and all the obvious modifications and changes belonging to the overall concept of the present invention should fall within the protection scope of the present invention.
Claims (8)
1. A power protection circuit for a street lamp control circuit, comprising: the system comprises a solar photovoltaic array, a photovoltaic controller, a solar storage battery, an undervoltage protection circuit and an overcurrent and overvoltage alarm circuit; the input end of the photovoltaic controller is connected with the output end of the solar photovoltaic array, the output end of the photovoltaic controller is connected with the input end of the solar storage battery, and the undervoltage protection circuit and the overcurrent and overvoltage alarm circuit are both connected with the solar storage battery; the undervoltage protection circuit comprises a self-locking control unit, a switch tube control unit and a voltage comparison unit, the self-locking control unit, the switch tube control unit and the voltage comparison unit are electrically connected, the self-locking control unit comprises an MCU (microprogrammed control Unit), the overcurrent and overvoltage alarm circuit comprises an overcurrent and overvoltage prompt unit and a load isolation unit, the overcurrent and overvoltage prompt unit is electrically connected with the load isolation unit, and the overcurrent and overvoltage prompt unit comprises a light-emitting diode D1 and a protection resistor R15.
2. The power protection circuit for the street lamp control circuit according to claim 1, further comprising a communication module for remote communication, wherein the communication module is electrically connected with the MCU controller.
3. The power protection circuit for the street lamp control circuit according to claim 2, wherein the communication module comprises a GSM module, and the GSM module is JB35 GD.
4. The power protection circuit for the street lamp control circuit according to claim 1, wherein the switch tube control unit comprises a PMOS tube Q2.
5. The power protection circuit of claim 4, wherein the voltage comparison unit comprises a comparator U1, a reference voltage U2, a resistor R1 to a resistor R8, capacitors C1 to C4, and a transistor Q1, wherein one end of the resistor R1 is connected in parallel with the source of the PMOS tube Q2 and then connected to the positive electrode of the solar battery, the other end of the resistor R1 is connected in parallel with one end of the capacitor C1 and one end of the resistor R2, the other end of the capacitor C1 is connected to ground, the other end of the resistor R2 is connected in parallel with the gate of the PMOS tube Q2 and the collector of the transistor Q1, the emitter of the transistor Q1 is connected to ground, the base of the transistor Q1 is connected to the output end of the comparator U1 through the resistor R3, the drain of the PMOS tube Q2 is connected in parallel with the positive electrode of the capacitor C2 and one end of the resistor R5, and the negative electrode of the capacitor C2 is connected to ground, the capacitor C3 is connected in parallel to two ends of the capacitor C2, the resistor R4 is connected in parallel between an output end of the comparator U1 and one end of the resistor R5, the other end of the resistor R5 is connected in parallel with an inverting input end of the comparator U1 and an output end of the reference voltage U2, a non-inverting input end of the comparator U1, one end of the resistor R7 and one end of the capacitor C4 are connected in parallel with one end of the resistor R6, the other end of the resistor R6 is connected in parallel with one end of the resistor R5 and then connected with a load output end, and the other end of the resistor R7 is connected in parallel with the other end of the capacitor C4 through the resistor R8 and then connected with the ground.
6. The power protection circuit as claimed in claim 5, wherein the transistor Q1 is an NPN transistor, and the capacitor C2 is a polar capacitor.
7. The power protection circuit for the street lamp control circuit according to claim 1, wherein the load isolation unit comprises a 555 chip, a resistor R9-R14, a capacitor C5, a capacitor C6, a capacitor C7, a transistor Q3, a transistor Q4, a transistor Q5 and a Zener diode D2, wherein the anode of the LED D1 is connected with the pin 3 of the 555 chip, the cathode of the LED D1 is connected with the cathode of the solar battery through the protection resistor R15, the pin 4 of the 555 chip is connected with the pin 8 in parallel and then connected with the anode of the solar battery, the pin 7 of the 555 chip is connected with the base of the transistor Q4 through the resistor R14 in parallel, the resistor R13 is connected between the base and the emitter of the transistor Q4 in parallel, the emitter of the transistor Q4 is connected with the pin 4 of the 555 chip in parallel, the collector of the transistor Q4 is connected with one end of the resistor R9 and then connected with the load output terminal, the other end of the resistor R9 is connected in parallel with the emitter of the triode Q3, one end of the resistor R11 and one end of the resistor R12 through the resistor R10, the slide arm of the resistor R10 is connected with the negative electrode of the zener diode D2, the positive electrode of the zener diode D2 is connected with the collector of the triode Q3, the collector of the triode Q3 is connected in parallel with the collector of the triode Q5 and one end of the capacitor C5 and then connected with the pin 6 of the 555 chip, the other end of the resistor R11 is connected with the base of the triode Q5, the emitter of the triode Q5 is connected with the other end of the resistor R12, the other end of the capacitor C5 and one end of the capacitor C6 are connected with the negative electrode of the solar battery, the other end of the capacitor C6 is connected with the pin 5 of the chip, and the capacitor C7 is connected in parallel with the two ends of the solar battery.
8. The power protection circuit of claim 7, wherein the transistor Q3 and the transistor Q5 are NPN transistors, the transistor Q4 is a PNP transistor, and the capacitor C7 is a polar capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022083616.3U CN213817258U (en) | 2020-09-22 | 2020-09-22 | Power supply protection circuit for street lamp control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022083616.3U CN213817258U (en) | 2020-09-22 | 2020-09-22 | Power supply protection circuit for street lamp control circuit |
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| CN213817258U true CN213817258U (en) | 2021-07-27 |
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| CN202022083616.3U Active CN213817258U (en) | 2020-09-22 | 2020-09-22 | Power supply protection circuit for street lamp control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362309A (en) * | 2022-01-04 | 2022-04-15 | 深圳欧陆通电子股份有限公司 | Forward and reverse buck-boost charge-discharge circuit and electric tool |
| CN114977116A (en) * | 2022-08-02 | 2022-08-30 | 青岛鼎信通讯股份有限公司 | Battery overcurrent and undervoltage protection circuit suitable for electric power product |
-
2020
- 2020-09-22 CN CN202022083616.3U patent/CN213817258U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362309A (en) * | 2022-01-04 | 2022-04-15 | 深圳欧陆通电子股份有限公司 | Forward and reverse buck-boost charge-discharge circuit and electric tool |
| CN114977116A (en) * | 2022-08-02 | 2022-08-30 | 青岛鼎信通讯股份有限公司 | Battery overcurrent and undervoltage protection circuit suitable for electric power product |
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Effective date of registration: 20230807 Address after: 415000 Village Group 3, Shuangxianggu Village, Ludi Mountain, Wuling District, Changde City, Hunan Province Patentee after: Luo Gonghe Address before: 362100 shop 2, 350m north of dingchitu village committee, Zishan Town, Hui'an County, Quanzhou City, Fujian Province Patentee before: HUIAN DERMVPURE MACHINERY CO.,LTD. |
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Effective date of registration: 20230822 Address after: 415000 Changde Avenue, Xin'an community, Dongjiang street, Wuling District, Changde City, Hunan Province (Room 303, building B04, Wuling Industrial New Area) Patentee after: Hunan Yunke Intelligent Electronic Technology Co.,Ltd. Address before: 415000 Village Group 3, Shuangxianggu Village, Ludi Mountain, Wuling District, Changde City, Hunan Province Patentee before: Luo Gonghe |