Intelligent circuit breaker wireless module based on LoRa technology

Abstract

The utility model discloses an intelligent circuit breaker wireless module based on LoRa technology, which comprises a LoRa module, a CPU module, an AC-DC power supply and an RS485 communication module, the input end of the AC-DC power supply is connected with AC, and the output end of the AC-DC power supply outputs 3.3 V / 2A DC power supply to supply power to the LoRa module, the CPU module and the RS485 communication module; the CPU module is electrically connected with the LoRa module; the RS485 communication module is electrically connected with the CPU module; the output end of the RS485 communication module is used for being connected with a circuit breaker. According to the intelligent circuit breaker wireless module based on the LoRa technology, the intelligent circuit breaker can be remotely controlled through a control center.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a smart circuit breaker wireless module based on LoRa technology. Background Technology

[0002] Long Range Radio (LoRa) is a low-power local area network (LAN) wireless standard. LoRa's biggest advantage is its ability to travel farther than other wireless methods while maintaining the same power consumption, achieving a balance between low power consumption and long range, typically extending the distance by 3-5 times compared to traditional wireless radio frequency communication. Therefore, LoRa's applications are becoming increasingly widespread. However, in current technology, LoRa communication modules cannot be easily and quickly connected to smart circuit breakers. Utility Model Content

[0003] In view of the above-mentioned problems, this utility model provides a smart circuit breaker wireless module based on LoRa technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A smart circuit breaker wireless module based on LoRa technology includes a LoRa module, a CPU module, an AC-DC power supply, and an RS485 communication module. The AC-DC power supply input is connected to AC power, and the output provides 3.3V / 2A DC power to power the LoRa module, CPU module, and RS485 communication module. The CPU module is electrically connected to the LoRa module, and the RS485 communication module is electrically connected to the CPU module. The output of the RS485 communication module is used to connect to the circuit breaker.

[0006] In one possible implementation, the AC-DC power supply further includes a power supply circuit unit and a DC-DC conversion circuit unit, wherein the power supply circuit unit is used to convert AC alternating current into 12V DC voltage, and the DC-DC conversion circuit unit is used to convert the 12V DC voltage into 3.3V DC voltage.

[0007] In one possible implementation, the power supply circuit unit further includes a live wire input terminal and a neutral wire input terminal. The neutral wire input terminal is connected to one end of a fuse F1. The other end of the fuse F1 and the live wire input terminal are connected across a variable resistor RV1. The two ends of the variable resistor RV1 are respectively connected to a first inductor L1 at the live wire end and a second inductor L2 at the neutral wire end. The other ends of the first inductor L1 and the second inductor L2 are sequentially connected across a twenty-second resistor R22, a capacitor CX1, and a first diode D4. The two ends of the first diode D4 are respectively connected to the two AC input terminals of the switching power supply chip. One output terminal of the switching power supply chip is grounded, and the other output terminal is sequentially connected across an electrolytic capacitor E2. The seventeenth capacitor C17 and the second diode D5 then output a 12V DC voltage.

[0008] In one possible implementation, the DC-DC conversion chip of the DC-DC conversion circuit unit is SY8120B1. The 12V DC voltage input terminal is connected across the thirteenth capacitor C13 and the fourteenth capacitor C14, and then connected to the IN and EN terminals of SY8120B1. The fifteenth capacitor C15 is connected between the LX and BS terminals of SY8120B1. The LX terminal is also connected to one end of the fourth inductor L4. The other end of the fourth inductor L4 is connected to the sixteenth capacitor C16, the twenty-third resistor R23, and one end of the eighteenth capacitor C18 to output a 3.3V DC voltage. The other end of the sixteenth capacitor C16 is connected to the FB terminal of SY8120B1, the other end of the twenty-third resistor R23, and one end of the twenty-fourth resistor R24. The other end of the eighteenth capacitor C18 is grounded.

[0009] In one possible implementation, the LoRa module uses an E22-400T22S chip.

[0010] The present invention has the following advantages: the smart circuit breaker wireless module based on LoRa technology, as described above, enables remote control of the smart circuit breaker through the control center; the module is physically connected to the smart circuit breaker via a dedicated interface mechanism; and the module is easy to install. Attached Figure Description

[0011] Figure 1 This is a schematic block diagram of a smart circuit breaker wireless module based on LoRa technology according to an embodiment of the present invention.

[0012] Figure 2 This is an electronic circuit diagram of the power supply circuit unit in a LoRa-based smart circuit breaker wireless module according to an embodiment of the present invention.

[0013] Figure 3 This is an electronic circuit diagram of the DC-DC conversion circuit unit in a LoRa-based smart circuit breaker wireless module according to an embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram illustrating the application of a LoRa-based smart circuit breaker wireless module according to an embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] See Figure 1 The diagram shows a schematic block diagram of a smart circuit breaker wireless module based on LoRa technology according to an embodiment of the utility model. It includes a LoRa module, a CPU module, an AC-DC power supply, and an RS485 communication module. The AC-DC power supply input is connected to AC power, and the output provides 3.3V / 2A DC power to power the LoRa module, CPU module, and RS485 communication module. The CPU module is electrically connected to the LoRa module; the RS485 communication module is electrically connected to the CPU module; and the output of the RS485 communication module is used to connect to the circuit breaker.

[0017] In a specific application example, the AC-DC power supply further includes a power supply circuit unit and a DC-DC conversion circuit unit. The power supply circuit unit converts AC power into 12V DC voltage, and the DC-DC conversion circuit unit converts the 12V DC voltage into 3.3V DC voltage. See also Figure 2 The power supply circuit unit further includes a live wire input terminal and a neutral wire input terminal. The neutral wire input terminal is connected to one end of fuse F1. The other end of fuse F1 and the live wire input terminal are connected across a variable resistor RV1. The two ends of the variable resistor RV1 are respectively connected to a first inductor L1 at the live wire end and a second inductor L2 at the neutral wire end. The other ends of the first inductor L1 and the second inductor L2 are sequentially connected across a twenty-second resistor R22, a capacitor CX1, and a first diode D4. The two ends of the first diode D4 are respectively connected to the two AC input terminals of the switching power supply chip. One output terminal of the switching power supply chip is grounded, and the other output terminal is sequentially connected across an electrolytic capacitor E2, a seventeenth capacitor C17, and a second diode D5 to output a 12V DC voltage. See also... Figure 3The DC-DC converter circuit unit uses the SY8120B1 chip. The 12V DC input is connected to the IN and EN terminals of the SY8120B1 via capacitors C13 (13th) and C14 (14th). Capacitor C15 is connected between the LX and BS terminals of the SY8120B1. The LX terminal is also connected to one end of inductor L4. The other end of inductor L4 is connected to capacitors C16 (16th), R23 (23rd), and one end of capacitor C18 (18th) to output a 3.3V DC voltage. The other end of capacitor C16 is connected to the FB terminal of the SY8120B1, the other end of resistor R23, and one end of resistor R24. The other end of capacitor C18 is grounded. The LoRa module uses the E22-400T22S chip.

[0018] See Figure 4 The LoRa-based wireless module for smart circuit breakers in this embodiment, namely the GK5TDU-LoRa shown in the figure, is used as a slave device. The GK5TDU-LoRa acquires data and control signals from the GK5-S smart circuit breaker, aggregates them to the LoRa master station, and forwards them to the host computer, thereby enabling the host computer in the control center to remotely control the GK5-S smart circuit breaker.

[0019] It should be understood that the exemplary embodiments described herein are illustrative and not restrictive. Although one or more embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A smart circuit breaker wireless module based on LoRa technology, characterized in that, It includes a LoRa module, a CPU module, an AC-DC power supply, and an RS485 communication module. The AC-DC power supply input is connected to AC power, and the output provides 3.3V / 2A DC power to power the LoRa module, CPU module, and RS485 communication module. The CPU module is electrically connected to the LoRa module, and the RS485 communication module is electrically connected to the CPU module. The output of the RS485 communication module is used to connect to a circuit breaker.

2. The smart circuit breaker wireless module based on LoRa technology as described in claim 1, characterized in that, The AC-DC power supply further includes a power supply circuit unit and a DC-DC conversion circuit unit. The power supply circuit unit is used to convert AC alternating current into 12V DC voltage, and the DC-DC conversion circuit unit is used to convert 12V DC voltage into 3.3V DC voltage.

3. The smart circuit breaker wireless module based on LoRa technology as described in claim 2, characterized in that, The power supply circuit unit further includes a live wire input terminal and a neutral wire input terminal. The neutral wire input terminal is connected to one end of a fuse F1. The other end of the fuse F1 and the live wire input terminal are connected across a variable resistor RV1. The two ends of the variable resistor RV1 are respectively connected to the first inductor L1 at the live wire end and the second inductor L2 at the neutral wire end. The other ends of the first inductor L1 and the second inductor L2 are sequentially connected across a twenty-second resistor R22, a capacitor CX1, and a first diode D4. The two ends of the first diode D4 are respectively connected to the two AC input terminals of the switching power supply chip. One output terminal of the switching power supply chip is grounded, and the other output terminal is sequentially connected across an electrolytic capacitor E2. The seventeenth capacitor C17 and the second diode D5 then output a 12V DC voltage.

4. The smart circuit breaker wireless module based on LoRa technology as described in claim 3, characterized in that, The DC-DC conversion chip of the DC-DC conversion circuit unit is SY8120B1. The 12V DC voltage input terminal is connected to the IN and EN terminals of SY8120B1 after being connected across the thirteenth capacitor C13 and the fourteenth capacitor C14. The fifteenth capacitor C15 is connected between the LX and BS terminals of SY8120B1. The LX terminal is also connected to one end of the fourth inductor L4. The other end of the fourth inductor L4 is connected to the sixteenth capacitor C16, the twenty-third resistor R23, and one end of the eighteenth capacitor C18 to output a 3.3V DC voltage. The other end of the sixteenth capacitor C16 is connected to the FB terminal of SY8120B1, the other end of the twenty-third resistor R23, and one end of the twenty-fourth resistor R24. The other end of the eighteenth capacitor C18 is grounded.

5. The smart circuit breaker wireless module based on LoRa technology as described in claim 3, characterized in that, The LoRa module uses the E22-400T22S chip.

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