Transformer through-flow test voltage regulator based on single-phase adjustable transformer

Abstract

The invention relates to a transformer through-flow test voltage regulator based on a single-phase adjustable transformer, and relates to the field of power system relay protection. A voltage regulating unit and a remote control unit are arranged, and the voltage regulating unit comprises an air switch, a switching power supply and an electric voltage regulator which are connected with the air switch, a voltage regulating liquid crystal screen and a voltage regulating PCB. The voltage regulation PCB comprises a voltage regulation single chip microcomputer, a voltage regulation communication module, a voltage regulation stabilizer, a temperature acquisition module, a current acquisition module, an AD acquisition module, a two-way relay module, a voltage acquisition module and a current transformer; the remote control unit comprises a remote control liquid crystal screen and a remote control PCB. The remote control PCB comprises a charging chip, a USB charging port, a lithium battery, a remote control single-chip microcomputer, a remote control voltage stabilizer and a remote control communication module. The voltage regulation communication module is in communication connection with the remote control communication module. Under the condition, three-phase split-phase operation and remote control of experimental instruments can be realized, electric shock of personnel is prevented, and four safety protection modes are provided.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection of electric power systems, and in particular to a transformer through-current test voltage regulator based on a single-phase adjustable transformer. Background Art

[0002] In the power system, the main transformer is one of the key equipment, and its performance test is crucial to ensure the safe and stable operation of the power grid. Traditionally, when conducting a three-phase current flow test on the main transformer, a three-phase 220V voltage is usually connected to one side of the main transformer, and the current size and the phase difference between the voltage and current are measured on the other sides to evaluate the working status and electrical characteristics of the main transformer.

[0003] However, the traditional boosting method has obvious limitations: when the booster is not used, the voltage applied to the main transformer is fixed, and the boosting range cannot be flexibly adjusted according to actual needs. This not only limits the range of test conditions, but may also affect the accuracy of the test results due to inappropriate voltage. In addition, existing boosting equipment is often large and heavy, which poses a considerable challenge to field tests that require frequent movement and installation of wiring. More importantly, due to the high internal operating voltage of these devices, operators face a certain risk of electric shock when conducting tests on site, which poses a potential threat to personal safety. Summary of the invention

[0004] The purpose of the present invention is to provide a transformer current test voltage regulator based on a single-phase adjustable transformer to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a transformer current-carrying test voltage regulator based on a single-phase adjustable transformer, comprising: A voltage regulating unit, comprising an air switch, a switching power supply and an electric voltage regulator connected to the air switch, a voltage regulating LCD screen, and a voltage regulating PCB board, wherein the voltage regulating PCB board comprises a voltage regulating single chip microcomputer, a voltage regulating communication module connected to the voltage regulating single chip microcomputer, a voltage regulating regulator connected to the voltage regulating single chip microcomputer, a temperature acquisition module connected to the voltage regulating single chip microcomputer, a current acquisition module connected to the voltage regulating single chip microcomputer, an AD acquisition module connected to the voltage regulating single chip microcomputer, a dual-channel relay module connected to the voltage regulating single chip microcomputer, a voltage acquisition module connected to the AD acquisition module, and a current transformer connected to the current acquisition module, wherein the voltage acquisition module is connected to the switching power supply, and the dual-channel relay module is connected to the electric voltage regulator; and A remote control unit, comprising a remote control LCD screen and a remote control PCB board, wherein the remote control PCB board comprises a charging chip, a USB charging port connected to the charging chip and a lithium battery, a remote control single chip computer, a remote control voltage regulator connected to the remote control single chip computer, and a remote control communication module connected to the remote control single chip computer, wherein the remote control LCD screen is connected to the remote control single chip computer; Wherein, the voltage regulation communication module is communicatively connected with the remote control communication module.

[0006] In a possible implementation, the input terminal L is connected to the A1 terminal of the air switch, and the A2 terminal of the air switch is connected to the input AC220V terminal of the electric voltage regulator, the L terminal of the switching power supply, and the HT+ terminal of the voltage acquisition module; The input terminal N is connected to the N terminal of the switching power supply, the AC neutral terminal of the electric voltage regulator, the HT-terminal of the voltage acquisition module, and the output terminal N.

[0007] In a possible implementation, the +12V terminal of the switching power supply is connected to the +12V terminal of the electric voltage regulator, the -12V terminal of the switching power supply is connected to the -12V terminal of the electric voltage regulator, the +5V terminal of the switching power supply is connected to the +5V copper mesh of the voltage regulating PCB board, the COM terminal of the switching power supply is connected to the GND copper mesh of the voltage regulating PCB board, and the GND terminal of the switching power supply is connected to the ground terminal.

[0008] In a possible implementation, the output 0-250V terminal of the electric voltage regulator is connected to the CT1 terminal of the current transformer through a fuse, and the CT2 terminal of the current transformer is connected to the output terminal L; The boost 1 terminal of the electric voltage regulator is connected to the COM1 terminal of the dual-circuit relay module, and the boost 2 terminal of the electric voltage regulator is connected to the NO1 terminal of the dual-circuit relay module; The step-down 1 terminal of the electric voltage regulator is connected to the COM2 terminal of the dual-circuit relay module, and the step-down 2 terminal of the electric voltage regulator is connected to the NO2 terminal of the dual-circuit relay module.

[0009] In a possible implementation, the pin2 terminal of the temperature acquisition module is connected to the 1027 terminal of the voltage regulating microcontroller; The INA end of the dual-channel relay module is connected to the 1015 end of the voltage regulating microcontroller, the INB end of the dual-channel relay module is connected to the 1016 end of the voltage regulating microcontroller, and the COM end of the dual-channel relay module is connected to the GND copper mesh of the voltage regulating PCB board.

[0010] In a possible implementation, the pin1 end of the current acquisition module is connected to the CT-a end of the current transformer, the pin2 end of the current acquisition module is connected to the CT-b end of the current transformer, and the pin7 end of the current acquisition module is connected to the 1026 end of the voltage regulating microcontroller; The + end of the voltage acquisition module is connected to the pin49 end of the AD acquisition module, the - end of the voltage acquisition module is connected to the pin50 end of the AD acquisition module, the pin24 end of the AD acquisition module is connected to the 104 end of the voltage regulating microcontroller, the pin12 end of the AD acquisition module is connected to the 102 end of the voltage regulating microcontroller, and the pin13 end of the AD acquisition module is connected to the 101 end of the voltage regulating microcontroller.

[0011] In a possible implementation, the RX terminal of the voltage-regulated liquid crystal screen is connected to the terminal 108 of the voltage-regulated single-chip microcomputer, and the TX terminal of the voltage-regulated liquid crystal screen is connected to the terminal 109 of the voltage-regulated single-chip microcomputer.

[0012] In a possible implementation, the P04 terminal of the voltage regulating communication module is connected to the 1010 terminal of the voltage regulating single-chip microcomputer, the P05 terminal of the voltage regulating communication module is connected to the 1011 terminal of the voltage regulating single-chip microcomputer, the RX terminal of the voltage regulating communication module is connected to the 1012 terminal of the voltage regulating single-chip microcomputer, the TX terminal of the voltage regulating communication module is connected to the 1013 terminal of the voltage regulating single-chip microcomputer, and the P06 terminal of the voltage regulating communication module is connected to the 1014 terminal of the voltage regulating single-chip microcomputer; The Pin1 end of the voltage regulator is connected to the +5V copper mesh of the voltage regulating PCB board, the Pin2 end of the voltage regulator is connected to the GND copper mesh of the voltage regulating PCB board, and the Pin5 end of the voltage regulator is connected to the VDD end of the voltage regulating microcontroller.

[0013] In a possible implementation, the RX terminal of the remote control LCD screen is connected to the terminal 108 of the remote control single chip microcomputer, and the TX terminal of the remote control LCD screen is connected to the terminal 109 of the remote control single chip microcomputer; The P04 end of the remote control communication module is connected to the 1010 end of the remote control single-chip microcomputer, the P05 end of the remote control communication module is connected to the 1011 end of the remote control single-chip microcomputer, the RX end of the remote control communication module is connected to the 1012 end of the remote control single-chip microcomputer, the TX end of the remote control communication module is connected to the 1013 end of the remote control single-chip microcomputer, and the P06 end of the remote control communication module is connected to the 1014 end of the remote control single-chip microcomputer.

[0014] In a possible implementation, the VCC end of the USB charging port is connected to the pin1 end of the charging chip, and the GND end of the USB charging port is connected to the GND copper mesh of the remote control PCB board; The pin9 end of the charging chip is connected to the GND copper mesh of the remote control PCB board, the pin6 end of the charging chip is connected to the + end of the lithium battery, the pin8 end of the charging chip is connected to the +5V copper mesh of the remote control PCB board, and the - end of the lithium battery is connected to the GND copper mesh of the remote control PCB board; The Pin1 end of the remote control regulator is connected to the +5V copper network of the remote control PCB board, the Pin2 end of the remote control regulator is connected to the GND copper network of the remote control PCB board, and the Pin5 end of the remote control regulator is connected to the VDD end of the remote control microcontroller.

[0015] The beneficial effects brought about by the technical solution provided by the present invention include at least: By setting up a voltage regulating unit and a remote control unit, the voltage regulating unit includes an air switch, a switching power supply and an electric voltage regulator connected to the air switch, a voltage regulating LCD screen, and a voltage regulating PCB board, and the voltage regulating PCB board includes a voltage regulating single chip microcomputer, a voltage regulating communication module, a voltage regulating voltage regulator, a temperature acquisition module, a current acquisition module, an AD acquisition module, a dual-channel relay module, a voltage acquisition module, and a current transformer; the remote control unit includes a remote control LCD screen and a remote control PCB board, and the remote control PCB board includes a charging chip, a USB charging port, a lithium battery, a remote control single chip microcomputer, a remote control voltage regulator, and a remote control communication module; wherein, the voltage regulating communication module is connected to the remote control communication module. In this case, three-phase split-phase operation can be realized, which is convenient for on-site transportation; the communication connection between the three-phase voltage regulator and the remote control can reach a distance of 200 meters, and personnel can remotely control the experimental instrument when wiring and observing at any location, which is convenient for on-site testing; the test personnel are away from the test electricity to prevent electric shock; it has four protection modes: short circuit protection, over-temperature protection, three-phase unbalance protection, and phase loss protection, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 A structural block diagram of phase A, phase B or phase C of a voltage regulating unit of a transformer current test voltage regulator based on a single-phase adjustable transformer provided by an exemplary embodiment of the present invention is shown.

[0018] Figure 2A structural block diagram of a remote control unit of a transformer current test voltage regulator based on a single-phase adjustable transformer provided by an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 A structural block diagram of the A phase, B phase or C phase of a voltage regulating unit of a transformer current test voltage regulator based on a single-phase adjustable transformer provided by an exemplary embodiment of the present invention is shown. Figure 2 The structural block diagram of a remote control unit of a transformer current test voltage regulator based on a single-phase adjustable transformer provided by an exemplary embodiment of the present invention is shown. It is worth noting that the structural block diagrams of the A phase, B phase or C phase of the voltage regulating unit are the same. In detail, the transformer current test voltage regulator based on the single-phase adjustable transformer includes: a voltage regulating unit and a remote control unit, the voltage regulating unit includes an air switch, a switching power supply T-30B and an electric voltage regulator TBB connected to the air switch, a voltage regulating LCD screen T1, and a voltage regulating PCB board, the voltage regulating PCB board includes a voltage regulating single-chip microcomputer, a voltage regulating communication module connected to the voltage regulating single-chip microcomputer, a voltage regulating regulator connected to the voltage regulating single-chip microcomputer, a temperature acquisition module connected to the voltage regulating single-chip microcomputer, a current acquisition module connected to the voltage regulating single-chip microcomputer, an AD acquisition module connected to the voltage regulating single-chip microcomputer, a dual-channel relay module connected to the voltage regulating single-chip microcomputer, A voltage acquisition module connected to the AD acquisition module, and a current transformer CT connected to the current acquisition module, the voltage acquisition module is connected to the switching power supply T-30B, and the dual-channel relay module is connected to the electric voltage regulator TBB; the remote control unit includes a remote control LCD screen T1 and a remote control PCB board, the remote control PCB board includes a charging chip, a USB charging port and a lithium battery connected to the charging chip, a remote control single-chip microcomputer, a remote control voltage regulator connected to the remote control single-chip microcomputer, and a remote control communication module connected to the remote control single-chip microcomputer, the remote control LCD screen T1 is connected to the remote control single-chip microcomputer; wherein, the voltage regulation communication module is communicatively connected to the remote control communication module.

[0022] In one example, the remote control unit is a handheld remote control, the voltage regulating microcontroller and the remote control microcontroller are both Raspberry Pi RP2350, the voltage regulating communication module and the remote control communication module are both Zigbee module LRF215A, the voltage regulating regulator and the remote control regulator are both ME6211C33-5V to 3.3V, the temperature acquisition module is DS18B20, the current acquisition module is CC6900, the AD acquisition module is AD7606, the voltage acquisition module is VSM025A, the charging chip is IP5306, and the lithium battery is 800mha.

[0023] It can be understood that the working power supplies of the voltage regulating unit and all chips and modules on the remote control unit are connected to the +5V and GND copper grids of their corresponding PCB boards, and the power connection lines of the chips and modules are omitted in the figure.

[0024] In the above voltage regulating unit: Air switch: used to protect the circuit from damage caused by overload or short circuit.

[0025] Switching power supply T-30B: Provides stable operating voltage for electronic components in the circuit.

[0026] Electric voltage regulator TBB: adjusts the output voltage mechanically to meet different test requirements.

[0027] Voltage regulation LCD screen T1: Displays current voltage, current and other parameters to facilitate operators to monitor the voltage regulation process.

[0028] Voltage regulating microcontroller: core control chip, responsible for receiving instructions and controlling the voltage regulation process.

[0029] Voltage regulation communication module: realizes data exchange with the remote control unit.

[0030] Voltage regulator: ensures that the voltage regulator microcontroller and other sensitive components receive a stable power supply.

[0031] Temperature acquisition module: monitors the internal temperature of the equipment to prevent failures caused by overheating.

[0032] Current acquisition module: used with current transformer CT to measure the actual current flowing.

[0033] AD acquisition module: converts analog signals into digital signals for processing by the microcontroller.

[0034] Dual relay module: switches circuit status according to microcontroller instructions.

[0035] Voltage acquisition module: measures the actual output voltage and feeds it back to the voltage regulating microcontroller.

[0036] Current transformer CT: used to measure the actual current on the high voltage side and provide input signal for the current acquisition module.

[0037] In the above remote control unit: Remote control LCD screen T1: Displays the status information of the remote control unit, such as battery power, connection status, etc.

[0038] Charging chip: manages the charging process of the lithium battery to ensure safe charging.

[0039] USB charging port and lithium battery: Provides portable power supply for the remote control unit.

[0040] Remote control microcontroller: processes input from the user interface and sends instructions to the voltage regulation unit.

[0041] Remote control voltage stabilizer: ensures stable operating voltage for remote control microcontroller and other components.

[0042] Remote control communication module: connects with the voltage regulation communication module to realize remote control function.

[0043] Further, the input terminal L is connected to the A1 terminal of the air switch, the A2 terminal of the air switch is connected to the input AC220V terminal of the electric voltage regulator TBB, the L terminal of the switching power supply T-30B, and the HT+ terminal of the voltage acquisition module; the input terminal N is connected to the N terminal of the switching power supply T-30B, the AC neutral terminal of the electric voltage regulator TBB, the HT- terminal of the voltage acquisition module, and the output terminal N. The +12V terminal of the switching power supply T-30B is connected to the +12V terminal of the electric voltage regulator TBB, the -12V terminal of the switching power supply T-30B is connected to the -12V terminal of the electric voltage regulator TBB, the +5V terminal of the switching power supply T-30B is connected to the +5V copper mesh of the voltage regulating PCB board, the COM terminal of the switching power supply T-30B is connected to the GND copper mesh of the voltage regulating PCB board, and the GND terminal of the switching power supply T-30B is connected to the ground terminal. The output 0-250V end of the electric voltage regulator TBB is connected to the CT1 end of the current transformer CT through the fuse F1, and the CT2 end of the current transformer CT is connected to the output terminal L; the boost 1 end of the electric voltage regulator TBB is connected to the COM1 end of the dual-way relay module, and the boost 2 end of the electric voltage regulator TBB is connected to the NO1 end of the dual-way relay module; the step-down 1 end of the electric voltage regulator TBB is connected to the COM2 end of the dual-way relay module, and the step-down 2 end of the electric voltage regulator TBB is connected to the NO2 end of the dual-way relay module.

[0044] In the embodiment of the present application, input terminals L and N are connected to the power grid through air switches, respectively, wherein input terminal L is connected to the AC220V input terminal of the electric voltage regulator TBB, the L terminal of the switching power supply T-30B, and the HT+ terminal of the voltage acquisition module after passing through the A1 and A2 terminals of the air switch, while input terminal N is directly connected to the N terminal of the switching power supply T-30B, the neutral terminal of the electric voltage regulator TBB, the HT- terminal of the voltage acquisition module, and the output terminal N, thereby constructing a complete AC current path and providing the necessary working voltage for the subsequent circuit. In addition, the switching power supply T-30B not only provides the required ±12V DC power support for the electric voltage regulator TBB, but also delivers a +5V working voltage to the voltage regulator PCB board, and ensures the consistency of the ground connection of the entire circuit through its COM terminal and GND terminal, thereby ensuring that each electronic component can operate in a stable environment. At the same time, in order to protect the circuit from overload damage, the output end (0-250V) of the electric voltage regulator TBB is connected to the CT1 end of the current transformer CT via the fuse F1, and then led to the output terminal L from the CT2 end, realizing effective monitoring and limitation of the output current. Finally, the boost and buck control ends of the electric voltage regulator TBB are respectively connected to the dual-channel relay module, and the voltage regulating microcontroller can quickly adjust the output voltage level according to actual needs. This design not only improves the operational flexibility of the voltage regulator, but also enhances the response speed and accuracy of the entire circuit, ensuring stable and reliable power output in different application scenarios.

[0045] Furthermore, the pin2 end of the temperature acquisition module is connected to the 1027 end of the voltage regulating microcontroller; the INA end of the dual-channel relay module is connected to the 1015 end of the voltage regulating microcontroller, the INB end of the dual-channel relay module is connected to the 1016 end of the voltage regulating microcontroller, and the COM end of the dual-channel relay module is connected to the GND copper grid of the voltage regulating PCB board. The pin1 end of the current acquisition module is connected to the CT-a end of the current transformer CT, the pin2 end of the current acquisition module is connected to the CT-b end of the current transformer CT, and the pin7 end of the current acquisition module is connected to the 1026 end of the voltage regulating microcontroller; the + end of the voltage acquisition module is connected to the pin49 end of the AD acquisition module, the - end of the voltage acquisition module is connected to the pin50 end of the AD acquisition module, the pin24 end of the AD acquisition module is connected to the 104 end of the voltage regulating microcontroller, the pin12 end of the AD acquisition module is connected to the 102 end of the voltage regulating microcontroller, and the pin13 end of the AD acquisition module is connected to the 101 end of the voltage regulating microcontroller. The RX end of the voltage regulating LCD screen T1 is connected to the 108 end of the voltage regulating microcontroller, and the TX end of the voltage regulating LCD screen T1 is connected to the 109 end of the voltage regulating microcontroller. The P04 terminal of the voltage regulating communication module is connected to the 1010 terminal of the voltage regulating microcontroller, the P05 terminal of the voltage regulating communication module is connected to the 1011 terminal of the voltage regulating microcontroller, the RX terminal of the voltage regulating communication module is connected to the 1012 terminal of the voltage regulating microcontroller, the TX terminal of the voltage regulating communication module is connected to the 1013 terminal of the voltage regulating microcontroller, and the P06 terminal of the voltage regulating communication module is connected to the 1014 terminal of the voltage regulating microcontroller; the Pin1 terminal of the voltage regulating regulator is connected to the +5V copper mesh of the voltage regulating PCB board, the Pin2 terminal of the voltage regulating regulator is connected to the GND copper mesh of the voltage regulating PCB board, and the Pin5 terminal of the voltage regulating regulator is connected to the VDD terminal of the voltage regulating microcontroller.

[0046] In the embodiment of the present application, the pin2 terminal of the temperature acquisition module is connected to the 1027 terminal of the voltage regulating microcontroller, so that the microcontroller can monitor and process temperature data in real time, ensuring that the equipment operates within a safe operating temperature range. The INA terminal and INB terminal of the dual-channel relay module are respectively connected to the 1015 terminal and 1016 terminal of the voltage regulating microcontroller, and the COM terminal is connected to the GND copper mesh of the voltage regulating PCB board, so that the microcontroller can directly control the relay state, so that the voltage level in the circuit can be flexibly adjusted or the current path under abnormal conditions can be cut off. The current acquisition module is connected to the CT-a terminal and CT-b terminal of the current transformer CT through its pin1 terminal and pin2 terminal, and the collected current signal is transmitted to the 1026 terminal of the voltage regulating microcontroller via the pin7 terminal, providing accurate current feedback information, which is crucial for overcurrent protection and load monitoring. The + and - ends of the voltage acquisition module are connected to the pin49 and pin50 ends of the AD acquisition module respectively, and then the digitized voltage data (corresponding to the 104, 102, and 101 ends of the MCU) are sent to the voltage regulating MCU through different pins of the AD acquisition module (such as pin24, pin12, and pin13), ensuring the accuracy and reliability of voltage measurement. The RX and TX ends of the voltage regulating LCD screen T1 are connected to the 108 and 109 ends of the voltage regulating MCU respectively, and a serial communication interface is established, allowing the user to view the current status and parameter settings through the display screen, improving the transparency of operation. The voltage regulating communication module is connected to the corresponding ports (1010, 1011, 1012, 1013, and 1014) of the voltage regulating MCU through the P04, P05, RX, TX, and P06 ends, realizing the reception of remote control commands and the sending of status reports, enhancing scalability and remote management capabilities. Finally, Pin1 of the voltage regulator is connected to the +5V copper grid of the voltage regulator PCB board, Pin2 is connected to the GND copper grid of the voltage regulator PCB board, and Pin5 supplies power to the VDD end of the voltage regulator microcontroller, ensuring that the microcontroller and its peripheral devices have a stable operating voltage, which plays a key role in maintaining the normal operation of the entire circuit.

[0047] Specifically, the RX end of the remote control LCD screen T1 is connected to the 108 end of the remote control microcontroller, and the TX end of the remote control LCD screen T1 is connected to the 109 end of the remote control microcontroller; the P04 end of the remote control communication module is connected to the 1010 end of the remote control microcontroller, the P05 end of the remote control communication module is connected to the 1011 end of the remote control microcontroller, the RX end of the remote control communication module is connected to the 1012 end of the remote control microcontroller, the TX end of the remote control communication module is connected to the 1013 end of the remote control microcontroller, and the P06 end of the remote control communication module is connected to the 1014 end of the remote control microcontroller.

[0048] In the embodiment of the present application, the RX terminal of the remote control LCD screen T1 is connected to the 108 terminal of the remote control microcontroller, and the TX terminal is connected to the 109 terminal, so as to establish a serial communication interface between the two, so that the microcontroller can send display content to the LCD screen and receive operation feedback from the screen, thereby providing an intuitive operation interface for the user. In addition, the P04 terminal, P05 terminal, RX terminal, TX terminal and P06 terminal of the remote control communication module are respectively connected to the 1010 terminal, 1011 terminal, 1012 terminal, 1013 terminal and 1014 terminal of the remote control microcontroller, so as to build a complete two-way communication link. This connection allows the remote control unit to receive control signals or status updates from external devices (such as voltage regulating units), and can send out user operation instructions, so as to realize information interaction between the remote control and the controlled device. This design supports remote control functions, enhances flexibility and scalability, and ensures stable and reliable performance in different application scenarios.

[0049] More specifically, the VCC end of the USB charging port is connected to the pin1 end of the charging chip, and the GND end of the USB charging port is connected to the GND copper grid of the remote control PCB board; the pin9 end of the charging chip is connected to the GND copper grid of the remote control PCB board, the pin6 end of the charging chip is connected to the + end of the lithium battery, the pin8 end of the charging chip is connected to the +5V copper grid of the remote control PCB board, and the - end of the lithium battery is connected to the GND copper grid of the remote control PCB board; the Pin1 end of the remote control regulator is connected to the +5V copper grid of the remote control PCB board, the Pin2 end of the remote control regulator is connected to the GND copper grid of the remote control PCB board, and the Pin5 end of the remote control regulator is connected to the VDD end of the remote control microcontroller.

[0050] In the embodiment of the present application, the VCC end of the USB charging port is connected to the pin1 end of the charging chip, and the GND end of the USB charging port is connected to the GND copper mesh of the remote control PCB board, which provides a path for the external power supply to enter the voltage regulator circuit. The pin9 end of the charging chip is also connected to the GND copper mesh of the remote control PCB board to ensure the stability and safety of the circuit; the pin6 end of the charging chip is directly connected to the + end of the lithium battery to deliver charging current to the battery; the pin8 end of the charging chip is connected to the +5V copper mesh of the remote control PCB board, so that during the charging process, even if the battery is not fully charged, a stable 5V voltage supply can be obtained. The - end of the lithium battery is also connected to the GND copper mesh of the remote control PCB board, forming a complete circuit loop, ensuring that the battery can be charged correctly and provide energy during discharge. In addition, the Pin1 of the remote voltage regulator is connected to the +5V copper grid of the remote control PCB board, the Pin2 of the remote voltage regulator is connected to the GND copper grid of the remote control PCB board, and the Pin5 of the remote voltage regulator is connected to the VDD end of the remote control microcontroller to ensure that the microcontroller and its peripheral circuits have a stable operating voltage. This design not only supports efficient and safe battery charging, but also provides protection for sensitive components such as microcontrollers through the voltage regulator, avoiding potential damage caused by voltage fluctuations, thereby enhancing the reliability and performance of the entire remote control unit.

[0051] It should be noted that when conducting the three-phase flow test of the main transformer: The three-phase AC power supply is connected to the input terminals L and N of phase A, phase B and phase C, and is connected to the high-voltage side of the transformer from the output terminals L and N of phase A, phase B and phase C. The voltage regulating microcontroller monitors the output current through the current transformer CT and the output voltage through the voltage acquisition module. The voltage acquisition module is connected to the voltage regulating microcontroller through the AD acquisition module for the voltage regulating microcontroller to collect the three-phase voltage. The output IO signal of the voltage regulating microcontroller is connected to the dual-channel relay module. The closed contacts of the two relays in the dual-channel relay module control the forward and reverse rotation of the electric voltage regulator TBB to achieve voltage regulation.

[0052] This application is to achieve short-circuit protection: the air switch is used to connect the input terminal L and subsequent circuit components, such as the electric voltage regulator TBB, the switching power supply T-30B and the voltage acquisition module. The air switch (also known as a circuit breaker) is a safety device that can automatically cut off the flow of current when an overload or short circuit is detected. When a short circuit occurs, the electromagnetic tripping mechanism inside the air switch responds quickly and disconnects the circuit, thereby preventing equipment damage or other safety hazards caused by the short circuit. In addition, the output end of the electric voltage regulator TBB is connected in series with the fuse F1, and then connected to the current transformer CT. The fuse F1 used here serves as an additional layer of short-circuit protection, which melts to cut off the circuit in the event of an abnormally large current. Once the fuse blows, it is necessary to manually replace the new fuse to restore the circuit to work, ensuring that power can be re-applied only after the fault is eliminated, thereby improving the overall safety of the voltage regulator.

[0053] This application is to achieve over-temperature protection: the pin 2 of the temperature acquisition module is connected to the 1027 terminal of the voltage regulator microcontroller, which means that the data of the temperature sensor can be directly transmitted to the microcontroller for processing. The voltage regulator microcontroller receives information from the temperature acquisition module and compares it with the preset safety temperature threshold. If the temperature is detected to exceed the set safety range, the corresponding protection action will be triggered, such as shutting down certain loads or components in the entire voltage regulator to avoid hardware damage caused by excessive temperature.

[0054] The present application is to realize three-phase unbalance protection: the voltage acquisition module and the AD acquisition module are used to obtain the voltage value of each phase, and based on this, it is determined whether there is an imbalance phenomenon.

[0055] This application is to achieve phase loss protection: the CT1 end of the current transformer CT is connected to the output end of the electric voltage regulator TBB, and the CT2 end is connected to the output terminal L. If a phase is disconnected (i.e., phase loss), the current of the corresponding phase will disappear or become very small. At this time, the current transformer CT can capture this change and feed back the information to the voltage regulating microcontroller. Subsequently, the voltage regulating microcontroller will decide whether to start the protection mechanism based on the received current data, such as stopping the operation of the electric voltage regulator, so as to avoid motor damage or other potential risks caused by phase loss.

[0056] It should be understood that the specific examples herein are only intended to help those skilled in the art to better understand the present disclosure, rather than to limit the scope of the present invention.

[0057] It is understood that in the various implementations of this specification, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the present disclosure.

[0058] It can be understood that the various implementation modes described in this specification can be implemented individually or in combination, and the present disclosure is not limited to this.

[0059] Unless otherwise stated, all technical and scientific terms used in this disclosure have the same meaning as those generally understood by those skilled in the art of the technical field of this specification. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the scope of this specification. The term "and / or" used in this specification includes any and all combinations of one or more related listed items. The singular forms of "a", "above", and "the" used in this disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0060] The above is only a specific implementation of this specification, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this specification, which should be included in the protection scope of this specification. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A transformer current test voltage regulator based on a single-phase adjustable transformer, characterized in that: include: A voltage regulating unit, comprising an air switch, a switching power supply and an electric voltage regulator connected to the air switch, a voltage regulating LCD screen, and a voltage regulating PCB board, wherein the voltage regulating PCB board comprises a voltage regulating single chip microcomputer, a voltage regulating communication module connected to the voltage regulating single chip microcomputer, a voltage regulating regulator connected to the voltage regulating single chip microcomputer, a temperature acquisition module connected to the voltage regulating single chip microcomputer, a current acquisition module connected to the voltage regulating single chip microcomputer, an AD acquisition module connected to the voltage regulating single chip microcomputer, a dual-channel relay module connected to the voltage regulating single chip microcomputer, a voltage acquisition module connected to the AD acquisition module, and a current transformer connected to the current acquisition module, wherein the voltage acquisition module is connected to the switching power supply, and the dual-channel relay module is connected to the electric voltage regulator; as well as A remote control unit, comprising a remote control LCD screen and a remote control PCB board, wherein the remote control PCB board comprises a charging chip, a USB charging port connected to the charging chip and a lithium battery, a remote control single chip computer, a remote control voltage regulator connected to the remote control single chip computer, and a remote control communication module connected to the remote control single chip computer, wherein the remote control LCD screen is connected to the remote control single chip computer; Wherein, the voltage regulation communication module is communicatively connected with the remote control communication module.

2. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1 is characterized in that: The input terminal L is connected to the A1 end of the air switch, and the A2 end of the air switch is connected to the input AC220V end of the electric voltage regulator, the L end of the switching power supply, and the HT+ end of the voltage acquisition module; The input terminal N is connected to the N terminal of the switching power supply, the AC neutral terminal of the electric voltage regulator, the HT-terminal of the voltage acquisition module, and the output terminal N.

3. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1 is characterized in that: The +12V end of the switching power supply is connected to the +12V end of the electric voltage regulator, the -12V end of the switching power supply is connected to the -12V end of the electric voltage regulator, the +5V end of the switching power supply is connected to the +5V copper mesh of the voltage regulating PCB board, the COM end of the switching power supply is connected to the GND copper mesh of the voltage regulating PCB board, and the GND end of the switching power supply is connected to the ground terminal.

4. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1 is characterized in that: The output 0-250V terminal of the electric voltage regulator is connected to the CT1 terminal of the current transformer through a fuse, and the CT2 terminal of the current transformer is connected to the output terminal L; The boost 1 terminal of the electric voltage regulator is connected to the COM1 terminal of the dual-circuit relay module, and the boost 2 terminal of the electric voltage regulator is connected to the NO1 terminal of the dual-circuit relay module; The step-down 1 terminal of the electric voltage regulator is connected to the COM2 terminal of the dual-circuit relay module, and the step-down 2 terminal of the electric voltage regulator is connected to the NO2 terminal of the dual-circuit relay module.

5. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1 is characterized in that: The pin2 terminal of the temperature acquisition module is connected to the 1027 terminal of the voltage regulating microcontroller; The INA end of the dual-channel relay module is connected to the 1015 end of the voltage regulating microcontroller, the INB end of the dual-channel relay module is connected to the 1016 end of the voltage regulating microcontroller, and the COM end of the dual-channel relay module is connected to the GND copper mesh of the voltage regulating PCB board.

6. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1 is characterized in that: The pin1 end of the current acquisition module is connected to the CT-a end of the current transformer, the pin2 end of the current acquisition module is connected to the CT-b end of the current transformer, and the pin7 end of the current acquisition module is connected to the 1026 end of the voltage regulating microcontroller; The + end of the voltage acquisition module is connected to the pin49 end of the AD acquisition module, the - end of the voltage acquisition module is connected to the pin50 end of the AD acquisition module, the pin24 end of the AD acquisition module is connected to the 104 end of the voltage regulating microcontroller, the pin12 end of the AD acquisition module is connected to the 102 end of the voltage regulating microcontroller, and the pin13 end of the AD acquisition module is connected to the 101 end of the voltage regulating microcontroller.

7. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1 is characterized in that: The RX end of the voltage-regulated liquid crystal screen is connected to the 108 end of the voltage-regulated single-chip microcomputer, and the TX end of the voltage-regulated liquid crystal screen is connected to the 109 end of the voltage-regulated single-chip microcomputer.

8. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1 is characterized in that: The P04 terminal of the voltage regulating communication module is connected to the 1010 terminal of the voltage regulating single chip microcomputer, the P05 terminal of the voltage regulating communication module is connected to the 1011 terminal of the voltage regulating single chip microcomputer, the RX terminal of the voltage regulating communication module is connected to the 1012 terminal of the voltage regulating single chip microcomputer, the TX terminal of the voltage regulating communication module is connected to the 1013 terminal of the voltage regulating single chip microcomputer, and the P06 terminal of the voltage regulating communication module is connected to the 1014 terminal of the voltage regulating single chip microcomputer; The Pin1 end of the voltage regulator is connected to the +5V copper mesh of the voltage regulating PCB board, the Pin2 end of the voltage regulator is connected to the GND copper mesh of the voltage regulating PCB board, and the Pin5 end of the voltage regulator is connected to the VDD end of the voltage regulating microcontroller.

9. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1, characterized in that: The RX terminal of the remote control LCD screen is connected to the terminal 108 of the remote control single chip microcomputer, and the TX terminal of the remote control LCD screen is connected to the terminal 109 of the remote control single chip microcomputer; The P04 end of the remote control communication module is connected to the 1010 end of the remote control single-chip microcomputer, the P05 end of the remote control communication module is connected to the 1011 end of the remote control single-chip microcomputer, the RX end of the remote control communication module is connected to the 1012 end of the remote control single-chip microcomputer, the TX end of the remote control communication module is connected to the 1013 end of the remote control single-chip microcomputer, and the P06 end of the remote control communication module is connected to the 1014 end of the remote control single-chip microcomputer.

10. The transformer current test voltage regulator based on a single-phase adjustable transformer according to claim 1, characterized in that: The VCC end of the USB charging port is connected to the pin1 end of the charging chip, and the GND end of the USB charging port is connected to the GND copper mesh of the remote control PCB board; The pin9 end of the charging chip is connected to the GND copper mesh of the remote control PCB board, the pin6 end of the charging chip is connected to the + end of the lithium battery, the pin8 end of the charging chip is connected to the +5V copper mesh of the remote control PCB board, and the - end of the lithium battery is connected to the GND copper mesh of the remote control PCB board; The Pin1 end of the remote control regulator is connected to the +5V copper network of the remote control PCB board, the Pin2 end of the remote control regulator is connected to the GND copper network of the remote control PCB board, and the Pin5 end of the remote control regulator is connected to the VDD end of the remote control microcontroller.

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