Intelligent controller of low-voltage intelligent frame circuit breaker
Through the intelligent controller of low-voltage intelligent framework circuit breaker, combined with multiple modules and circuit designs, the problem of inaccurate current and voltage signal processing in the power system of existing intelligent circuit breakers is solved, intelligent power management and fault protection are achieved, and the safety and reliability of the power system are improved.
Patent Information
- Application Number
- CN202422354653.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Existing intelligent circuit breakers are difficult to achieve efficient current and voltage signal processing in power systems, resulting in the inability to accurately and timely protect and manage power equipment, which poses safety risks.
The intelligent controller adopts a low-voltage intelligent framework circuit breaker, including the core board, power board, LCD board, signal board and remote signal remote control board. Through voltage signal conditioning, current signal conditioning, MCU module, power management, Bluetooth communication and other modules, real-time processing and logic control of current signals and voltage signals is realized, combined with digital isolator and power management, to ensure the reliability and fault protection of data transmission.
It realizes accurate and timely processing of current signals and voltage signals, provides measurement and fault parameter recording functions, ensures that the intelligent controller works reliably in the event of power grid failure, reduces safety hazards, and improves the intelligent management level of power consumption equipment.
Smart Images
Figure CN223141603U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, and particularly relates to an intelligent controller for a low-voltage intelligent frame circuit breaker. Background Technique
[0002] With the development of the national economy and the continuous progress of technology, higher and higher requirements are put forward for the power supply quality of the power system, whether in industrial production or daily life. As an essential important support in the construction of the ubiquitous power Internet of Things system, intelligent circuit breakers are developing more and more towards an intelligent level to meet more needs.
[0003] As the core of the circuit breaker, the intelligent controller realizes intelligent power consumption by combining with the Internet of Things, and intelligently manages daily power consumption equipment. Its main function is to prevent and warn of power consumption in advance, avoid the occurrence of fires and electric shocks in daily power consumption, and reduce potential safety hazards of power consumption. Content of the Utility Model
[0004] The purpose of the utility model is to provide an intelligent controller for a low-voltage intelligent frame circuit breaker to solve the above deficiencies in the prior art.
[0005] To achieve the above purpose, the utility model provides the following technical solution: an intelligent controller for a low-voltage intelligent frame circuit breaker, such as Figure 1 shown in an intelligent controller for a low-voltage intelligent frame circuit breaker, including a core board, a power board, a liquid crystal board, a signal board and a telecontrol and tele-signaling board.
[0006] The core board includes a voltage signal conditioning module, a current signal conditioning module, an MCU module, an AD module, a power management module, a lighting module, a Bluetooth communication module, a 485 communication module, and a switching power supply module.
[0007] Further specifically, three-phase four-wire voltage signals are directly input into the voltage signal conditioning circuit through the terminal block, and after passing through the operational amplifier, they are integrated by the AD chip and input into the MCU chip. There is a safety capacitor at the input end for anti-interference processing. Three-phase currents, leakage currents and zero-sequence currents are input into the core board through the signal board, enter the current signal conditioning circuit, and after passing through the operational amplifier, they are integrated by the AD chip and input into the MCU chip. The current signal conditioning circuit suppresses the interference of high-frequency signals through magnetic beads. The 12V power supply is converted into 1.5V, 3.3V, 5V and 24V through the switching power supply module to supply power to different chips and modules respectively. Among them, the 1.5V power supply supplies power to the voltage follower circuit and the N-line voltage signal conditioning circuit, the 3.3V power supply supplies power to the MCU, the debugging port, the LED lamp, the clock, the AD chip, the 485 module, the Bluetooth module, and the voltage and current signal conditioning circuits at the same time, the 5V power supply supplies power to the LED lamp, the AD chip and the 485 module, and the 24V power supply supplies power to the telecontrol and tele-signaling modules.
[0008] To further specify, the MCU is located on the core board. The MCU has a wide range of system functions, enhanced I / O and peripherals, and provides standard communication interfaces and multiple timers. The IIC interface is used to control the key module, a set of UARTs are used to communicate with the 485 module, a set of UARTs are used as debug ports and Bluetooth multiplexing for debugging and program upgrades, and switched to Bluetooth communication, SPI is used to control the lighting module, a set of SPI and a set of QSPI are used to communicate with the storage unit, the HOSCI interface is used to connect to the crystal oscillator to provide an external oscillator clock, the VBAT pin is used to provide battery voltage to power the real-time clock, the ADC interface is used for full power detection, etc., and multiple I / O interfaces are used to process some control signals.
[0009] To further specify, the 485 module uses a high-performance two-channel digital isolator to electrically isolate the 485 communication circuit and the MCU. The digital isolator has an isolation voltage of 3750Vrms and high insulation capability, which helps prevent noise and surges on the data bus or other circuits from entering the local ground terminal, thereby interfering with or damaging sensitive circuits. The Bluetooth module uses an ultra-low power Bluetooth 4.2 module and is powered by a 3.3V power supply.
[0010] To further specify, the power management module uses a power management chip to introduce current conditioning signals from the MCU, and directly outputs them to the trip control module through related circuit operations such as the adder in the module to achieve a rapid response to fault tripping. The lighting module controls the lighting, extinguishing, and flashing operations of the operating light, fault indicator light, signal light, and communication indicator light. These lights are distributed on the core board and the LCD board and are controlled by multiple I / O ports of the MCU.
[0011] The power board includes a rectifier and a step-down module.
[0012] To further specify, the introduced 220V single-phase AC voltage is introduced into the power board through the terminal block, converted into a 12V DC power supply through rectification and step-down, input into the signal board, and then input into the core board through the signal board to power each module.
[0013] The liquid crystal panel includes a key module, a liquid crystal display module, and a voltage conversion module.
[0014] Further explanation: 12V power is introduced from the core board to the LCD board, and converted to 3.3V by the voltage conversion module to power the LCD screen. The LCD screen uses a 128×64COG LCD with 8-bit input, which can display fault information, operation information and analog data. The key module is controlled by the MCU through the IIC interface, and can be used with the LCD display module to perform visual operations such as function and parameter setting, historical record viewing, and analog data viewing.
[0015] The signal board includes a current signal acquisition module and a trip control module.
[0016] For further specific description, the output signal of the secondary side of the current transformer is directly connected to the current signal acquisition terminal of the signal board. After protection measures such as varistors and TVS tubes, it enters the current signal conditioning circuit of the core board. At the same time, the trip signal output by the core board is output to the mechanical trip device through the signal board to achieve the fault protection function.
[0017] The remote signaling and remote control board includes a remote signaling acquisition module and a remote control module.
[0018] For further specific description, as the central controller of the intelligent switch, it receives the remote signaling signals and data generated during the operation of the intelligent switch through the remote signaling acquisition module. After anti-electromagnetic interference and other protection measures such as varistors and TVS tubes, it is then input to the MCU chip on the core board. At the same time, the MCU outputs 4-way remote control signals to the remote control module, which respectively control 4-way relays to output control signals to the intelligent switch.
[0019] In the above technical solution, the intelligent controller performs real-time processing and logical control on current signals and voltage signals, and realizes accurate and timely protection according to various protection characteristics;
[0020] It has the functions of measurement and fault parameter recording, can display parameters such as voltage, current, and power in real time and record fault information, providing greater convenience for users.
[0021] In addition, the power supply of the intelligent controller adopts a dual-power supply scheme jointly powered by an auxiliary power supply and a quick-saturation current transformer, ensuring that the intelligent controller can work reliably when the grid voltage drops due to faults such as overload and short circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.
[0023] Figure 1 It is a schematic structural diagram of an intelligent controller for a low-voltage intelligent frame circuit breaker;
[0024] Figure 2 It is a schematic electrical structure diagram;
[0025] Figure 3 It is a schematic structural diagram of a voltage signal conditioning module;
[0026] Figure 4 It is a schematic structural diagram of a current signal conditioning module;
[0027] Figure 5Schematic diagram of the MCU interface structure;
[0028] Figure 6 Schematic diagram of the remote control module structure;
[0029] Figure 7 Schematic diagram of the key module and the lighting module;
[0030] Figure 8 Schematic diagram of the liquid crystal display module;
[0031] Figure 9 Schematic diagram of the structure of the core components of the power conversion;
[0032] Figure 10 Schematic diagram of the software architecture. Detailed implementation manners
[0033] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.
[0034] Please refer to Figures 1 - 10 , an intelligent controller of a low-voltage intelligent frame circuit breaker, such as Figure 1 shown in an intelligent controller of a low-voltage intelligent frame circuit breaker, which includes a core board, a power board, a liquid crystal board, a signal board, and a remote signal and remote control board.
[0035] The core board includes a voltage signal conditioning module, a current signal conditioning module, an MCU module, an AD module, a power management module, a lighting module, a Bluetooth communication module, a 485 communication module, and a switching power supply module.
[0036] For further specific description, the three-phase four-wire voltage signal is directly input into the voltage signal conditioning circuit through the terminal block, and after passing through the operational amplifier, it is integrated by the AD chip and input into the MCU chip. There is a safety capacitor at the input end for anti-interference processing. The three-phase current, leakage current, and zero-sequence current are input into the core board through the signal board, enter the current signal conditioning circuit, and after passing through the operational amplifier, are integrated by the AD chip and input into the MCU chip. The current signal conditioning circuit suppresses the interference of high-frequency signals through magnetic beads. The 12V power supply is converted into 1.5V, 3.3V, 5V, and 24V through the switching power supply module to supply power to different chips and modules respectively. Among them, the 1.5V power supply supplies power to the voltage follower circuit and the N-line voltage signal conditioning circuit, the 3.3V supplies power to the MCU, the debugging port, the LED lamp, the clock, the AD chip, the 485 module, the Bluetooth module, and the voltage and current signal conditioning circuits at the same time, the 5V supplies power to the LED lamp, the AD chip, and the 485 module, and the 24V supplies power to the remote signal and remote control modules.
[0037] To further specify, the MCU is located on the core board. The MCU has a wide range of system functions, enhanced I / O and peripherals, and provides standard communication interfaces and multiple timers. The IIC interface is used to control the key module, a set of UARTs are used to communicate with the 485 module, a set of UARTs are used as debug ports and Bluetooth multiplexing for debugging and program upgrades, and switched to Bluetooth communication, SPI is used to control the lighting module, a set of SPI and a set of QSPI are used to communicate with the storage unit, the HOSCI interface is used to connect to the crystal oscillator to provide an external oscillator clock, the VBAT pin is used to provide battery voltage to power the real-time clock, the ADC interface is used for full power detection, etc., and multiple I / O interfaces are used to process some control signals.
[0038] To further specify, the 485 module uses a high-performance two-channel digital isolator to electrically isolate the 485 communication circuit and the MCU. The digital isolator has an isolation voltage of 3750Vrms and high insulation capability, which helps prevent noise and surges on the data bus or other circuits from entering the local ground terminal, thereby interfering with or damaging sensitive circuits. The Bluetooth module uses an ultra-low power Bluetooth 4.2 module and is powered by a 3.3V power supply.
[0039] To further specify, the power management module uses a power management chip to introduce current conditioning signals from the MCU, and directly outputs them to the trip control module through related circuit operations such as the adder in the module to achieve a rapid response to fault tripping. The lighting module controls the lighting, extinguishing, and flashing operations of the operating light, fault indicator light, signal light, and communication indicator light. These lights are distributed on the core board and the LCD board and are controlled by multiple I / O ports of the MCU.
[0040] The power board includes a rectifier and a step-down module.
[0041] To further specify, the introduced 220V single-phase AC voltage is introduced into the power board through the terminal block, converted into a 12V DC power supply through rectification and step-down, input into the signal board, and then input into the core board through the signal board to power each module.
[0042] The liquid crystal panel includes a key module, a liquid crystal display module, and a voltage conversion module.
[0043] Further explanation: 12V power is introduced from the core board to the LCD board, and converted to 3.3V by the voltage conversion module to power the LCD screen. The LCD screen uses a 128×64COG LCD with 8-bit input, which can display fault information, operation information and analog data. The key module is controlled by the MCU through the IIC interface, and can be used with the LCD display module to perform visual operations such as function and parameter setting, historical record viewing, and analog data viewing.
[0044] The signal board includes a current signal acquisition module and a trip control module.
[0045] For further specific description, the output signal of the secondary side of the current transformer is directly connected to the current signal acquisition terminal of the signal board. After protection measures such as varistors and TVS tubes, it enters the current signal conditioning circuit of the core board. At the same time, the trip signal output by the core board is output to the mechanical trip device through the signal board to achieve the fault protection function.
[0046] The remote signaling and remote control board includes a remote signaling acquisition module and a remote control module.
[0047] For further specific description, as the central controller of the intelligent switch, it receives the remote signaling signals and data generated during the operation of the intelligent switch through the remote signaling acquisition module. After anti-electromagnetic interference and other protection measures such as varistors and TVS tubes, it is then input into the MCU chip of the core board. At the same time, the MCU outputs 4 remote control signals to the remote control module, which respectively control 4 relays to output control signals to the intelligent switch.
[0048] Only some exemplary embodiments of the present invention have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. An intelligent controller for a low-voltage intelligent frame circuit breaker, characterized in that, It includes a core board, a power supply board, a liquid crystal board, a signal board and a remote signaling and remote control board; The core board includes a voltage signal conditioning module, a current signal conditioning module, an MCU module, an AD module, a power management module, a lighting module, a Bluetooth communication module, a 485 communication module, and a switching power supply module; The power supply board includes a rectification and buck module; The liquid crystal board includes a key module, a liquid crystal display module, and a voltage conversion module.
2. The intelligent controller of a low-voltage intelligent frame circuit breaker according to claim 1, characterized in that, The voltage signal is directly input into the voltage signal conditioning circuit through the terminal block, and after passing through the operational amplifier, it is integrated into the MCU chip through the AD chip.
3. The intelligent controller of a low-voltage intelligent frame circuit breaker according to claim 2, characterized in that, The signal board includes a current signal acquisition module and a trip control module.
4. The intelligent controller of a low-voltage intelligent frame circuit breaker according to claim 3, characterized in that, The remote signaling and remote control board includes a remote signaling acquisition module and a remote control module.