Addressable power supply protection circuit

Abstract

The utility model relates to the technical field of light-emitting diode (LED) lighting, in particular to an addressable power supply protection circuit, which comprises a microprogrammed control unit (MCU), a sampling analysis module, an alternating current detection module, a level conversion module, an address setting dial switch and a relay, the filtering module is used for filtering and protecting current flowing into the alternating current detection module; the input end of the sampling analysis module is connected with the output end of the alternating current detection module and is used for sampling and analyzing the current signal output by the alternating current detection module and then outputting an instruction; the input end of the MCU is connected with the output end of the sampling analysis module and the address setting dial switch, the output end of the MCU is connected with the relay, and the MCU is used for receiving an instruction of the sampling analysis module and performing on-off control on the relay through the address setting dial switch according to data corresponding to the instruction, so that multiple control channels of the LED lamp can be protected respectively; corresponding channels can be opened and closed at any time, and circuit safety is further protected.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, specifically designing an addressable power supply protection circuit. Background Technology

[0002] In the widespread application of LED lighting technology, dimming devices are key components, and their performance directly affects the performance and system stability of LED luminaires. Currently, most LED dimming devices directly supply 220V AC power to LED luminaires. While this method can meet basic needs in simple application scenarios, its limitations become increasingly apparent when facing complex and ever-changing control requirements.

[0003] Firstly, the shortcomings of existing LED dimming devices are particularly evident in scenarios requiring independent control of multiple LED channels. Multi-channel control demands independent and precise regulation of each LED luminaire, encompassing aspects such as brightness adjustment and on / off control. However, most dimming devices on the market currently only support basic on / off and brightness adjustment functions, and often only allow synchronous control of a single channel or a limited number of channels, failing to achieve precise dimming and independent management of different channels. This limitation significantly weakens the adaptability and flexibility of LED luminaires in complex scenarios.

[0004] Secondly, the stability of parameters such as voltage, current, power, and frequency of LED lights is crucial for the normal operation of the system. Abnormal fluctuations in these parameters can lead to problems such as unstable brightness and flickering in the LED lights, and in severe cases, can cause permanent damage to the lights themselves or even the entire circuit system. However, existing LED dimming equipment suffers from significant technical bottlenecks in the detection and protection against abnormal parameters. Due to the lack of efficient parameter monitoring mechanisms and fault early warning systems, the equipment often fails to detect and handle potential abnormal parameter situations in a timely manner, thereby increasing the risk of system failure and maintenance costs.

[0005] Furthermore, with the continuous development of LED lighting technology and the expansion of its application scenarios, users are placing higher demands on the system's safety protection capabilities. This is especially true in applications requiring long-term, high-load operation, such as commercial and industrial lighting, where system safety protection is paramount. However, existing LED dimming equipment still has many shortcomings in terms of safety protection. For example, when an LED luminaire in a certain channel malfunctions, the system often lacks an effective self-protection mechanism to prevent the fault from spreading or causing more serious safety problems. This safety hazard not only threatens user safety but may also adversely affect the promotion and application of LED lighting technology. Utility Model Content

[0006] To overcome the shortcomings of the prior art, this application provides an addressable power supply protection circuit, which aims to improve the control accuracy, stability and safety of dimming devices.

[0007] The technical means adopted by this utility model to solve its technical problem is: an addressable power supply protection circuit, the improvement of which is that it includes an MCU, a sampling and analysis module, an AC detection module, a level conversion module, an address setting DIP switch, and a relay, wherein,

[0008] The output terminal of the level conversion module is connected to the input terminal of the AC detection module, and is used to filter and protect the current flowing into the AC detection module;

[0009] The input terminal of the sampling and analysis module is connected to the output terminal of the AC detection module, and is used to output instructions after sampling and analyzing the current signal output by the AC detection module.

[0010] The input terminal of the MCU is connected to the output terminal of the sampling and analysis module and the address setting DIP switch. The output terminal of the MCU is connected to the relay, which is used to receive the instructions from the sampling and analysis module and control the relay to open or close according to the data corresponding to the instructions through the address setting DIP switch.

[0011] The sampling analysis module described in the above technical solution includes a first sampling analysis unit and a second sampling analysis unit. The first sampling analysis unit includes chip U1, and the second sampling analysis unit includes chip U2. The model of chips U1 and U2 is BL6523GX.

[0012] The first sampling and analysis unit in the above technical solution also includes resistors R1, R3, R4, R5, R8, and R9, capacitors C1, C2, C3, C4, C5, C6, C7, C8, and C9, and crystal oscillator Y1.

[0013] The first pin of the chip U1 is connected to the resistor R5, and is also connected to the third pin through the resistor R4; the second pin of the chip U1 is connected to the resistor R1 and the sixth pin.

[0014] The fourth pin of the chip U1 is grounded through the capacitor C6, the fifth pin is grounded through the capacitor C6 and the resistor R9, the sixth pin is grounded through the capacitor C8, the seventh pin is directly grounded, and the eighth pin is connected to the resistor R8 and grounded through the capacitor C9.

[0015] Pin 10 of chip U1 is connected to one end of crystal oscillator Y1 and one end of capacitor C4. The other end of crystal oscillator Y1 is connected to one end of capacitor C5. The other end of capacitor C5 is connected to pin 11 of chip U1 and is grounded to the other end of capacitor C4.

[0016] Pin 12 of the chip U1 is grounded, pins 13 and 14 are connected to the MCU, and pin 15 is grounded through capacitor C3.

[0017] The second sampling and analysis unit also includes resistors R10, R11, R12, R5, R15, and R18, capacitors C10, C11, C12, C13, C14, C15, C16, C17, and C18, and crystal oscillator Y2.

[0018] The first pin of the chip U2 is connected to the resistor R11, and is also connected to the third pin through the resistor R15; the second pin of the chip U2 is connected to the resistor R10 and the 16th pin.

[0019] The fourth pin of the chip U2 is grounded through the capacitor C15, the fifth pin is grounded through the capacitor C16 and the resistor R18, the sixth pin is grounded through the capacitor C17, the seventh pin is directly grounded, and the eighth pin is connected to the resistor R17 and grounded through the capacitor C18.

[0020] Pin 10 of chip U2 is connected to one end of crystal oscillator Y2 and one end of capacitor C13. The other end of crystal oscillator Y2 is connected to one end of capacitor C14. The other end of capacitor C14 is connected to pin 11 of chip U2 and is grounded to the other end of capacitor C13.

[0021] Pin 12 of the chip U2 is grounded, pins 13 and 14 are connected to the MCU, and pin 15 is grounded through the capacitor C12.

[0022] The AC detection module described in the above technical solution includes a first AC detection unit and a second AC sampling unit, wherein,

[0023] The first AC detection unit includes a current sensor T1, a resistor R19, a resistor R20, and a capacitor C21, wherein,

[0024] The input terminal of the current sensor T1 is connected to the level conversion module. The first output terminal of the current sensor T1 is grounded through the resistor R19, the resistor R20, and the capacitor C21, respectively. The second output terminal of the current sensor T1 is directly grounded.

[0025] The second AC detection unit includes a current sensor T2, a resistor R21, a resistor R22, and a capacitor C24, wherein,

[0026] The input terminal of the current sensor T2 is connected to the level conversion module. The first output terminal of the current sensor T2 is grounded through the resistor R21, resistor R22, and capacitor C24, respectively. The second output terminal of the current sensor T2 is directly grounded.

[0027] The level conversion module described in the above technical solution includes transformer T3, resistors R23, R24, R25, R26, and R27, wherein...

[0028] The first output terminal 1 and the second output terminal 2 of the transformer T3 are respectively connected to the first AC detection unit and the second AC detection unit. The first input terminal 3 of the transformer T3 is respectively connected to one end of the resistor R26 and the resistor R27. The other end of the resistor R26 and the resistor R27 is connected to one end of the resistor R23. The other end of the resistor R23 is connected to the second input terminal 4 of the transformer T3. The other ends of the resistor R26 and the resistor R27 are also respectively connected to one end of the resistor R24 ​​and the resistor R25.

[0029] The MCU used in the above technical solution is an STC8H4K64TL.

[0030] The addressable power supply protection circuit described in the above technical solution also includes a power supply module, which is used to convert AC100-230V voltage into 3.3V, 5V and 12V voltage.

[0031] The MCU in the above technical solution is also connected to a protection module, which includes a chip U18 and a capacitor C93. The 5th pin of the chip U18 is connected to the 2nd pin through the capacitor C93.

[0032] The beneficial effects of this utility model are:

[0033] It can protect multiple control channels of LED lights separately, and the corresponding channels can be turned on and off at any time. Power can be cut off at any time when a channel is abnormal or there is no output, further protecting circuit safety. Attached Figure Description

[0034] Figure 1 This is a structural block diagram of an addressable power supply protection circuit shown in an embodiment of the present utility model;

[0035] Figure 2 This is a circuit diagram of the sampling and analysis module shown in an embodiment of the present invention;

[0036] Figure 3This is a circuit diagram of an AC sampling module shown in an embodiment of the present invention;

[0037] Figure 4 This is a circuit diagram of a level conversion module shown in an embodiment of the present invention;

[0038] Figure 5 This is a circuit diagram of a relay shown in an embodiment of the present invention;

[0039] Figure 6 This is a circuit diagram of the protection module shown in an embodiment of the present invention. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0042] like Figure 1 As shown, this application provides an addressable power supply protection circuit, including an MCU1, a sampling and analysis module2, an AC detection module3, a level conversion module4, an address setting DIP switch5, and a relay6, wherein...

[0043] The output terminal of the level conversion module 4 is connected to the input terminal of the AC detection module 3, and is used to filter and protect the current flowing into the AC detection module 3;

[0044] The input terminal of the sampling and analysis module 2 is connected to the output terminal of the AC detection module 3, and is used to output instructions after sampling and analyzing the current signal output by the AC detection module 3.

[0045] The input terminal of the MCU1 is connected to the output terminal of the sampling and analysis module 2 and the address setting DIP switch 5. The output terminal of the MCU1 is connected to the relay 6, which is used to receive the instructions from the sampling and analysis module 2 and control the relay 6 to open and close according to the data corresponding to the instructions through the address setting DIP switch 5.

[0046] Specifically, after MCU1 starts up, it reads the state of the address setting DIP switch 5 and obtains an address named ADD1. Then, it performs cyclic sampling on the sampling and analysis module 2 to obtain the corresponding voltage, current, power, and frequency, and stores the corresponding data in an array in real time. MCU1's serial port receives external commands. When the address corresponding to the received command is the same as ADD1, it returns the data corresponding to the voltage, current, power, and frequency. If the address does not match, no processing is performed. After receiving the corresponding data from the outside, overvoltage, undervoltage, overcurrent, overpower, frequency abnormalities, etc., can be controlled by controlling relay 6 to control the 220VAC to switch on and off, thus achieving safe protection for external power supply.

[0047] In one possible implementation, the MCU1 uses an STC8H4K64TL, which provides a rich set of GPIO pins (up to 44), supporting multiple modes such as quasi-bidirectional port mode, strong push-pull output mode, open-drain output mode, and high-impedance input mode.

[0048] In one possible implementation, such as Figure 2 As shown, the sampling analysis module 2 includes a first sampling analysis unit and a second sampling analysis unit, wherein,

[0049] The first sampling and analysis unit includes chip U1, resistors R1, R3, R4, R5, R8, R9, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, and crystal oscillator Y1.

[0050] The first pin of the chip U1 is connected to the resistor R5, and is also connected to the third pin through the resistor R4; the second pin of the chip U1 is connected to the resistor R1 and the sixth pin.

[0051] The fourth pin of the chip U1 is grounded through the capacitor C6, the fifth pin is grounded through the capacitor C6 and the resistor R9, the sixth pin is grounded through the capacitor C8, the seventh pin is directly grounded, and the eighth pin is connected to the resistor R8 and grounded through the capacitor C9.

[0052] Pin 10 of chip U1 is connected to one end of crystal oscillator Y1 and one end of capacitor C4. The other end of crystal oscillator Y1 is connected to one end of capacitor C5. The other end of capacitor C5 is connected to pin 11 of chip U1 and is grounded to the other end of capacitor C4.

[0053] Pin 12 of the chip U1 is grounded, pins 13 and 14 are connected to the MCU, and pin 15 is grounded through capacitor C3.

[0054] The second sampling and analysis unit includes chip U2, resistors R10, R11, R12, R5, R15, R18, capacitors C10, C11, C12, C13, C14, C15, C16, C17, C18, and crystal oscillator Y2.

[0055] The first pin of the chip U2 is connected to the resistor R11, and is also connected to the third pin through the resistor R15; the second pin of the chip U2 is connected to the resistor R10 and the 16th pin.

[0056] The fourth pin of the chip U2 is grounded through the capacitor C15, the fifth pin is grounded through the capacitor C16 and the resistor R18, the sixth pin is grounded through the capacitor C17, the seventh pin is directly grounded, and the eighth pin is connected to the resistor R17 and grounded through the capacitor C18.

[0057] Pin 10 of chip U2 is connected to one end of crystal oscillator Y2 and one end of capacitor C13. The other end of crystal oscillator Y2 is connected to one end of capacitor C14. The other end of capacitor C14 is connected to pin 11 of chip U2 and is grounded to the other end of capacitor C13.

[0058] Pin 12 of the chip U2 is grounded, pins 13 and 14 are connected to the MCU, and pin 15 is grounded through the capacitor C12.

[0059] In one exemplary embodiment, the chips U1 and U2 are BL6523GX, which is a wide-range single-phase multi-functional electronic energy metering chip suitable for simple single-phase multi-functional or single-phase power line carrier energy meter applications, and has a high cost performance.

[0060] The BL6523GX integrates three high-precision Sigma-Delta ADCs, analog circuit modules such as reference voltage and power management, as well as digital signal processing circuits for processing electrical parameters such as active power, apparent power, and RMS values ​​of current and voltage.

[0061] The BL6523GX has two current sampling terminals, which sample the live wire and neutral wire current respectively. When the difference between the two exceeds the set threshold, an indication signal is issued, indicating that there is electricity theft or incorrect wiring. Automatic switching between the two channels can be achieved according to the set threshold.

[0062] In one possible implementation, such as Figure 3 As shown, the AC detection module 3 includes a first AC detection unit and a second AC sampling unit, wherein,

[0063] The first AC detection unit includes a current sensor T1, a resistor R19, a resistor R20, and a capacitor C21, wherein,

[0064] The input terminal of the current sensor T1 is connected to the level conversion module. The first output terminal of the current sensor T1 is grounded through the resistor R19, the resistor R20, and the capacitor C21, respectively. The second output terminal of the current sensor T1 is directly grounded.

[0065] The second AC detection unit includes a current sensor T2, a resistor R21, a resistor R22, and a capacitor C24, wherein,

[0066] The input terminal of the current sensor T2 is connected to the level conversion module. The first output terminal of the current sensor T2 is grounded through the resistor R21, resistor R22, and capacitor C24, respectively. The second output terminal of the current sensor T2 is directly grounded.

[0067] In one possible implementation, such as Figure 4 As shown, the level conversion module 4 includes a transformer T3, resistors R23, R24, R25, R26, and R27, wherein...

[0068] The first output terminal 1 and the second output terminal 2 of the transformer T3 are respectively connected to the first AC detection unit and the second AC detection unit. The first input terminal 3 of the transformer T3 is respectively connected to one end of the resistor R26 and the resistor R27. The other end of the resistor R26 and the resistor R27 is connected to one end of the resistor R23. The other end of the resistor R23 is connected to the second input terminal 4 of the transformer T3. The other ends of the resistor R26 and the resistor R27 are also respectively connected to one end of the resistor R24 ​​and the resistor R25.

[0069] For one possible implementation, please refer to [link / reference]. Figure 1 As shown, the circuit also includes a power supply module 7, which is used to convert AC100-230V voltage into 3.3V, 5V and 12V voltage.

[0070] In one possible implementation, such as Figure 5 As shown, the relay 6 circuit includes two identical structures. The control signals output from MCU1 flow into REF1 and REF2 respectively to realize the switching of 220VAC.

[0071] In one possible implementation, such as Figure 6As shown, the MCU1 is also connected to a protection module 8, which includes a chip U18. Optionally, the chip U18 is a TPS3823-33, and a capacitor C93. The fifth pin of the chip U18 is connected to the second pin through the capacitor C93.

[0072] During normal circuit operation, the MCU periodically sends a signal to the input of chip U18. This signal resets the timer of chip U18 to prevent it from timing out. If, for some reason (such as program crashes, infinite loops, external interference, etc.), the MCU fails to send the signal within the specified time, the timer of chip U18 will time out. Once timeout occurs, chip U18 will output a reset signal to the circuit's reset terminal, resetting the circuit. After reset, the circuit will start executing the program from the beginning of the program memory, thus restoring normal circuit operation.

[0073] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An addressable power supply protection circuit, characterized by, The MCU, the sampling analysis module, the AC detection module, the level conversion module, the address setting dial switch and the relay are connected, wherein, The output end of the level conversion module is connected with the input end of the AC detection module, for filtering and protecting the current flowing into the AC detection module; The input end of the sampling analysis module is connected with the output end of the AC detection module, for sampling and analyzing the current signal output by the AC detection module and then outputting the instruction; The input end of the MCU is connected with the output end of the sampling analysis module and the address setting dial switch, and the output end of the MCU is connected with the relay, for receiving the instruction of the sampling analysis module and controlling the relay to be on or off according to the data corresponding to the instruction through the address setting dial switch.

2. An addressable power supply protection circuit according to claim 1, characterised in that, The sampling analysis module comprises a first sampling analysis unit and a second sampling analysis unit, the first sampling analysis unit comprises a chip U1, and the second sampling analysis unit comprises a chip U2, and the models of the chips U1 and U2 are BL6523GX.

3. An addressable supply protection circuit according to claim 2, wherein, The first sampling analysis unit further comprises a resistor R1, a resistor R3, a resistor R4, a resistor R5, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9 and a crystal oscillator Y1; The first pin of the chip U1 is connected with the resistor R5 and the third pin through the resistor R4; the second pin of the chip U1 is connected with the resistor R1 and the sixteenth pin; The fourth pin of the chip U1 is grounded through the capacitor C6, the fifth pin is grounded through the capacitor C6 and the resistor R9 respectively, the sixth pin is grounded through the capacitor C8, the seventh pin is directly grounded, and the eighth pin is connected with the resistor R8 and grounded through the capacitor C9; The tenth pin of the chip U1 is connected with one end of the crystal oscillator Y1 and one end of the capacitor C4, the other end of the crystal oscillator Y1 is connected with one end of the capacitor C5, the other end of the capacitor C5 is connected with the eleventh pin of the chip U1 and grounded together with the other end of the capacitor C4; The twelfth pin of the chip U1 is grounded, the thirteenth pin and the fourteenth pin are connected with the MCU, and the fifteenth pin is grounded through the capacitor C3; The second sampling analysis unit further comprises a resistor R10, a resistor R11, a resistor R12, a resistor R5, a resistor R15, a resistor R18, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18 and a crystal oscillator Y2; The first pin of the chip U2 is connected with the resistor R11 and the third pin through the resistor R15; the second pin of the chip U2 is connected with the resistor R10 and the sixteenth pin; The 4th pin of the chip U2 is grounded through the capacitor C15, the 5th pin is grounded through the capacitor C16 and the resistor R18 respectively, the 6th pin is grounded through the capacitor C17, the 7th pin is directly grounded, and the 8th pin is connected with the resistor R17 and grounded through the capacitor C18; The 10th pin of the chip U2 is connected with one end of the crystal Y2 and one end of the capacitor C13, the other end of the crystal Y1 is connected with one end of the capacitor C14, the other end of the capacitor C14 is connected with the 11th pin of the chip U2, and the other end of the capacitor C13 is grounded; The 12th pin of the chip U2 is grounded, the 13th pin and the 14th pin are connected with the MCU, and the 15th pin is grounded through the capacitor C12.

4. An addressable power supply protection circuit according to claim 1, wherein, The AC detection module comprises a first AC detection unit and a second AC detection unit, wherein, The first AC detection unit comprises a current sensor T1, a resistor R19, a resistor R20 and a capacitor C21, wherein, The input end of the current sensor T1 is connected with the level conversion module, the 1st output end of the current sensor T1 is grounded through the resistor R19, the resistor R20 and the capacitor C21 respectively, and the 2nd output end of the current sensor T1 is directly grounded; The second AC detection unit comprises a current sensor T2, a resistor R21, a resistor R22 and a capacitor C24, wherein, The input end of the current sensor T2 is connected with the level conversion module, the 1st output end of the current sensor T2 is grounded through the resistor R21, the resistor R22 and the capacitor C24 respectively, and the 2nd output end of the current sensor T2 is directly grounded.

5. An addressable supply protection circuit according to claim 4, characterized in that, The level conversion module comprises a transformer T3, a resistor R23, a resistor R24, a resistor R25, a resistor R26 and a resistor R27, wherein, The first output end 1 and the second output end 2 of the transformer T3 are connected with the first AC detection unit and the second AC detection unit respectively, the first input end 3 of the transformer T3 is connected with one end of the resistor R26 and the resistor R27 respectively, the other ends of the resistor R26 and the resistor R27 are connected with one end of the resistor R23, the other end of the resistor R23 is connected with the second input end 4 of the transformer T3, and the other ends of the resistor R26 and the resistor R27 are also connected with one end of the resistor R24 and the resistor R25 respectively.

6. An addressable power supply protection circuit according to claim 1, wherein, The MCU adopts STC8H4K64TL.

7. An addressable power supply protection circuit according to claim 1, wherein, The addressable power supply protection circuit further comprises a power supply module, which is used for converting AC 100-230V voltage into 3.3V, 5V and 12V voltage.

8. An addressable power supply protection circuit according to claim 1, wherein, The MCU is further connected with a protection module, and the protection module comprises a chip U18 and a capacitor C93, and the 5th pin of the chip U18 is connected with the 2nd pin through the capacitor C93.

Images