CN114389243B - Electronic detection controller for intelligent fuse and control method thereof - Google Patents
Electronic detection controller for intelligent fuse and control method thereof Download PDFInfo
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- CN114389243B CN114389243B CN202210061082.5A CN202210061082A CN114389243B CN 114389243 B CN114389243 B CN 114389243B CN 202210061082 A CN202210061082 A CN 202210061082A CN 114389243 B CN114389243 B CN 114389243B
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- 230000002093 peripheral effect Effects 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Fuses (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides an electronic detection controller for an intelligent fuse and a control method thereof, comprising the following steps: the current detection module is used for collecting current data in a branch circuit of the intelligent fuse in real time; the data processing module is used for receiving the current data of the current detection module, and sending a breaking signal when the current data reaches a preset threshold value and lasts for a specified time or when the intelligent fuse receives the breaking signal sent by an external breaking signal source; the excitation output module receives the breaking signal sent by the data processing module and triggers an electronic breaking trigger of the intelligent fuse, and the electronic breaking trigger detonates a breaker of the intelligent fuse with gunpowder inside to break a circuit. The invention solves the problems of the existing fuse that the state lacks effective monitoring management, the branch line current lacks effective monitoring, the unforeseeable line fault current reaches an extreme value, the line is actively disconnected before damage is caused, the loss is effectively controlled, and the line fault eliminating time is long and the efficiency is low.
Description
Technical Field
The invention relates to the technical field of intelligent fuses, in particular to an electronic detection controller for an intelligent fuse and a control method thereof.
Background
The fuse is widely applied to high-low voltage distribution systems, control systems and electric equipment, is used as a protector for short circuit and overcurrent, and is one of the most common protection devices.
With the rapid development of new energy industries such as wind power, photoelectricity and new energy automobiles and the continuous improvement of the requirements of industrial intelligent degree, the traditional fuse using the principle of fusing a melt by fault current as a line protection device can not meet the requirements of a new energy power system for more accurate detection, control and recording of the line current.
Therefore, the invention provides a novel electronic detection controller for an intelligent fuse and a control method thereof.
Disclosure of Invention
In order to solve the above problems, the present invention provides a new electronic detection controller for an intelligent fuse and a control method thereof, which are used for solving the above problems.
In order to achieve the above purpose, the present invention provides the following technical solutions.
An electronic detection control method for an intelligent fuse comprises the following steps:
collecting current data in a branch circuit of the intelligent fuse in real time;
when the current data reaches a preset threshold value and lasts for a prescribed time, or when the intelligent fuse receives a breaking signal sent by an external breaking signal source, an electronic breaking trigger of the intelligent fuse is triggered, and the electronic breaking trigger detonates a breaker of the intelligent fuse with gunpowder inside to break a circuit.
Preferably, the method further comprises: temperature compensation is carried out on the current data, and the method comprises the following steps:
testing and determining the corresponding relation between the current data flowing through the current detection sensor and the actual load current in the intelligent fuse circuit under different environment temperatures;
collecting current data and environmental temperature data of a branch line of the intelligent fuse in real time;
and determining the actual load current corresponding to the current data at the ambient temperature according to the corresponding relation between the current data and the actual load current, and taking the actual load current as the compensated current data.
Preferably, the obtaining of the correspondence between the current data flowing through the current detection sensor and the actual load current in the intelligent fuse circuit includes the following steps:
the current detection sensor is arranged in an ambient temperature range required by the intelligent fuse circuit;
determining the size of the temperature steps according to the precision requirement, and carrying out multiple current detection tests in each temperature step:
determining a load current range according to the current range of the intelligent fuse circuit;
inputting load current to the current detection sensors, and obtaining real-time current data detected by the current detection sensors corresponding to each load current every time when the preset load current is increased;
and (3) performing unitary linear fitting on a plurality of groups of real-time current data and actual load current through a least square method to obtain the corresponding relation between the current data flowing through the current detection sensor and the actual load current under the temperature step.
An electronic detection controller for an intelligent fuse, comprising:
the current detection module is used for collecting current data in a branch circuit of the intelligent fuse in real time;
the data processing module is used for receiving the current data of the current detection module, and sending a breaking signal when the current data reaches a preset threshold value and lasts for a specified time or when the intelligent fuse receives the breaking signal sent by an external breaking signal source;
the excitation output module receives the breaking signal sent by the data processing module and triggers an electronic breaking trigger of the intelligent fuse, and the electronic breaking trigger detonates a breaker of the intelligent fuse with gunpowder inside to break a circuit.
Preferably, the method further comprises: a temperature detection module;
the temperature detection module is used for detecting the environmental temperature data of the branch circuit of the intelligent fuse in real time.
Preferably, the data processing module receives the ambient temperature data detected by the temperature detecting module and the detected current data detected by the current detecting module, determines the actual load current corresponding to the current data at the ambient temperature according to the corresponding relation between the current data and the actual load current, and takes the actual load current as the compensated current data.
Preferably, the method further comprises: a state self-checking module;
the state self-checking module detects the working states of the current detection module and the excitation output module and the states of the external breaking signal source in real time to obtain analog signals, processes the analog signals through the data processing module, judges whether faults occur or not, and calculates to obtain fault codes.
Preferably, the current detection module comprises a current sensor chip; the current sensor chip comprises any one of a Hall current sensor, a mutual inductor and a shunt.
Preferably, when the state self-checking module detects the working state of the excitation output module in real time, the connection state of the excitation output end of the excitation output module and the electronic breaking trigger is obtained, and whether the excitation output module is in an output state is judged.
Preferably, the method further comprises: a communication module;
the communication module is used for data communication between the data processing module and the upper computer and transmitting current data and fault codes to the upper computer.
Preferably, the excitation output module comprises a P mos tube and an N mos tube which are respectively connected with two input ends of the electronic breaking trigger.
Preferably, the communication module comprises a CAN transceiver chip.
Preferably, the power supply module is further included; the power supply module comprises a first output end, a second output end, a third output end and a fourth output end;
the first output end is electrically connected with the data processing module; the second output end is electrically connected with the current detection module and supplies power for the current detection module; the third output end is electrically connected with the temperature detection module and supplies power for the temperature detection module; the fourth output end is electrically connected with the communication module and supplies power for the communication module.
Preferably, the power supply module comprises a DC-DC power supply chip.
The invention has the beneficial effects that: the invention provides an electronic detection controller for an intelligent fuse and a control method thereof, which realize the effective monitoring management of the state of the fuse and the effective monitoring of the current of a branch line; the circuit breaking method has the advantages that the circuit can be actively broken before the predictive fault current of the circuit reaches the extreme value and causes great damage, loss is effectively controlled, the fault breaking time of the circuit is short, and the efficiency is high.
Drawings
FIG. 1 is a block diagram of an electronic detection controller according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a current module according to an embodiment of the invention;
FIG. 3 is a diagram of a data processing module chip pin relationship in accordance with an embodiment of the present invention;
FIG. 4 is a diagram of a current detection module chip pin relationship according to an embodiment of the present invention;
FIG. 5 is a diagram of a temperature detection module chip pin relationship according to an embodiment of the present invention;
FIG. 6 is a pin relationship diagram of a CAN bus module chip in accordance with an embodiment of the invention;
FIG. 7 is a diagram of the pin relationships of the stimulus output module chip according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1-7, the invention provides an electronic detection control method for an intelligent fuse, which specifically comprises the following steps:
s1, testing the corresponding relation between current data of a current detection sensor and actual load current under different environment temperatures;
specifically, the temperature compensation calibration includes the steps of:
the controller is placed in an environment temperature range of minus 40 ℃ to 105 ℃ to carry out a current detection test through a Hall chip, and each 5 ℃ is a step;
when current detection is carried out in each temperature step, the load current ranges from 0A to 3000A, and 100A is added each time, so that the voltage value output by the Hall chip corresponding to each load current is obtained;
carrying out unitary linear fitting on a plurality of groups of real-time current data by a least square method to obtain a linear equation:
y＝ax+b
wherein y is the output voltage value of the Hall chip, and x is the load current value;
detecting the current ambient temperature, selecting a linear equation y=ax+b of a step range to which the temperature belongs, bringing the voltage measured by the Hall chip into the equation y, and obtaining a load current x, wherein the load current x is the detection current after temperature compensation.
S2, collecting current data and temperature detection data of a branch line of the intelligent fuse in real time.
S3, determining the actual load current corresponding to the current data at the temperature according to the corresponding relation between the load current and the current data, and taking the actual load current as the compensated current data;
s4, judging whether the compensated current data reaches a preset threshold value and lasts for a preset time, or outputting a breaking signal to the intelligent fuse when an external breaking signal source is received to give out a breaking signal, triggering an electronic breaking trigger, and detonating a breaker of the intelligent fuse with gunpowder to break a line.
An electronic detection controller for an intelligent fuse, comprising a control circuit board, wherein the control circuit board comprises:
the current detection module is used for detecting current data of the branch circuit in real time, detecting the transient current size and direction of the branch circuit and transmitting the current data to the data processing module; the current detection module comprises two Hall current sensor chips; the Hall sensor is parallel to the section and is arranged at the center of the gap of the section of the iron core. The redundant design of selecting two Hall current sensor chips can improve the current detection precision through the program algorithm of the data processing module, and meanwhile, the current detection module can still complete the current detection function when one Hall current sensor chip fails.
The temperature detection module is used for detecting temperature data of the branch line in real time and transmitting the temperature data to the data processing module; the temperature detection module includes an analog temperature sensor chip that converts temperature to an analog voltage.
The data processing module is used for calculating and processing the received data according to the requirements of the control program; judging whether a preset threshold value is reached or not and lasting for a set time according to the detected current data, or sending a breaking signal when an external breaking signal source gives out the breaking signal;
the excitation output module is used for providing a 24V pulse breaking signal for the intelligent fuse when receiving the breaking signal sent by the data processing module, triggering the electronic breaking trigger and detonating the breaker of the intelligent fuse with the gunpowder inside to break the circuit. When the data processing module gives a breaking signal, the excitation output module outputs 3 continuous pulse excitation outputs with the amplitude of DC24V and the waveform identical to the breaking signal given by the data processing module. The excitation output module comprises a Pmos tube for controlling the positive pole of DC24V pulse excitation output, an N mos tube for controlling the negative pole of DC24V pulse excitation output, a current limiting resistor and two filter capacitors which are electrically connected with the N mos tube.
The state self-checking module is used for detecting the working states of the current detection module, the temperature detection module and the excitation output module in real time and transmitting detection data to the data processing module. The state self-checking module detects the working states of the current detection module and the excitation output module in real time, converts the fault phenomenon into an analog signal, judges and calculates the fault code through the data processing module and uploads the fault code to the upper computer through the CAN bus module; the state self-checking module is used for detecting states of two Hall current sensor chips in the current detection module; the method comprises the following steps of two states of normal state, normal state and fault state, wherein the states of the two states are 3; the state self-checking module detects the working state of the excitation output module in real time, wherein the state self-checking module comprises whether the excitation output end of the excitation output module is reliably connected with an electronic breaking trigger of the intelligent fuse or not, and whether the excitation output module is in an output state or not; and the state self-checking module detects the external breaking signal in real time.
And the CAN bus module is used for data communication with the data processing module and transmitting the data to the upper computer. The CAN bus module comprises a CAN transceiver chip.
Further, the device also comprises a shell and an iron core; the shell comprises a bottom cover and a cover plate which are matched with each other; two symmetrical U-shaped grooves are formed in the inner side of the bottom cover, and through holes are formed in the centers of the bottom cover and the cover plate for mounting copper bars; the iron core is two U-shaped silicon steels with the same appearance and dimension and is respectively arranged in the two U-shaped grooves; the sections of the two iron cores are relatively parallel.
The power supply module is also included; the power supply module comprises a first output end, a second output end, a third output end and a fourth output end which are provided with capacitive and inductive filtering;
the first output end is electrically connected with the data processing module; the second output end is electrically connected with the current detection module and supplies power to the Hall current detection chip; the third output end is electrically connected with the temperature detection module and supplies power to the temperature detection chip; the fourth output end is electrically connected with the CAN bus module and supplies power for the CAN transceiver chip.
The power module comprises a filtering inductor and a filtering capacitor, wherein the filtering inductor and the filtering capacitor are connected with the 5V output end of the DC-DC power chip in a wide voltage range.
Referring to fig. 2, the power module is externally connected with a DC24V power supply, and provides a DC5V power supply for the electronic detection controller system after DC-DC chip conversion and output filtering. The circuit module comprises a DC-DC power supply chip U31 as a main body and a peripheral filter circuit. The 5-pin VIN end of U31 is connected with an external DC24V positive electrode. The 1-pin BOOST terminal and the 6-pin SW terminal are connected in parallel with a capacitor, and the 6-pin SW terminal is used as a DC5V output pin to be connected in series with an inductor. In addition, the 6-pin SW terminal is connected with the ground in series with two resistors R2 and R13, and the 3-pin VFB terminal is connected with the middle point of the voltage division of the resistors R2 and R13. The 2-pin GND terminal is directly connected to ground.
Referring to fig. 3, the data processing module needs to complete sampling, calculation and processing of data such as current, temperature and status self-checking modules according to logic of a pre-written program, and exchanges data with an upper computer through the CAN bus module. In addition, the output signal controls the operating state of the excitation output module. The data processing module comprises a CPU chip U1, a peripheral oscillating circuit and a reset circuit. The 1 pin MCLR of the CPU chip U1 is a reset pin, and is powered on to reset at a low level. The 1-pin MCLR is respectively connected in series to the output end of the DC5V power supply and the ground end of the capacitor C1 through a current limiting resistor R3. The 2-pin AIN1 and the 3-pin AIN2 of the chip U1 are respectively connected with the output ends of the two Hall current sensors through VIN1 and VIN2 ends after being connected with current limiting resistors R35 and R24 in series, and detected current data are sampled. The 5-pin VERF+ of the CPU chip U1 is a level reference end and is respectively connected with the positive electrode +24VIN and the ground end of an external DC24V power supply through series resistors R21 and R18. Pins 8 and 19 of the CPU chip U1 are grounded and are connected with the ground. The 12-pin ENB of the CPU chip U1 is an enabling control end and is connected with the positive electrode of the DC5V power supply and the ground end through series resistors R11 and R10 respectively. The 14 pin DS18B2 of the CPU chip U1 is a temperature data sampling end and is directly connected with the output end DS18B2 of the temperature detection module. The 15-pin DACOUT1 of the CPU chip U1 is connected with the input end DACOUT1 of the state self-checking circuit of the electronic breaking trigger of the intelligent fuse, and provides a high-level self-checking signal for the state self-checking of the electronic breaking trigger of the intelligent fuse. The 16-pin ALM0 of the CPU chip U1 is connected with a current limiting resistor R8 in series and then connected with the base electrode of a triode Q6 in the excitation output module, and the connection of a DC24V power supply in the excitation output module is controlled. The 20 pin VDD of CPU chip U1 is connected to the DC5V output of the power supply module. The 21-pin AIN3 of the CPU chip U1 is connected with the output end of the state self-checking circuit of the electronic breaking trigger of the intelligent fuse, and detects the state of the electronic breaking trigger and the triggering state of an external breaking signal. The 22-pin RS end of the CPU chip U1 is connected with the 8-pin RS end of the CAN bus chip U3. The 23-pin CANTX and the 24-pin CANTX of the CPU chip U1 are connected to the 1-pin TXD and the 4-pin RXD of the CAN bus chip U3, respectively. The 25 feet ALM1 of the CPU chip U1 are connected with the grid electrode of the MOS tube Q5 in the excitation output module, and control the grounding end of the DC24V power supply in the excitation output module. The 27 feet PGC and 28 feet PGD of the CPU chip U1 are respectively connected with the 4 feet and the 5 feet of the pin header J6 for downloading the program of the CPU chip U1.
Referring to fig. 4, the current detection module is based on two hall current sensor chips. The 1-pin VCC ends of the two Hall current sensor chips U5 and U7 are simultaneously connected to the DC5V output end of the power supply module. The 4-pin GND ends of the two Hall current sensor chips U5 and U7 are simultaneously connected to the ground. And 2 pins of the two Hall current sensor chips U5 and U7 are respectively connected with VIN1+ and VIN2+ ends in the data processing module.
Referring to fig. 5, the temperature detection module is formed by a temperature sensor chip U6. The 1 pin VDD of U6 is connected to the DC5V output of the power module. The terminal VOUT 2 of U6 is connected with the terminal DS18B2 temperature data sampling terminal 14 of the CPU chip U1. The 3-pin GND end of U6 is directly connected with the ground end.
Referring to fig. 6, the CAN bus module includes a CAN transceiver chip U3 and a periphery. Pins 1 and 4 of the CAN transceiver chip U3 are respectively connected with pins 23 CANTX and 24 CANRX of the CPU chip U1. The 2-pin GND of the CAN transceiver chip U3 is directly connected to ground. The 3-pin VDD and the 5-pin VREF of the CAN transceiver chip U3 are simultaneously connected with the DC5V output end of the power supply module. The 6-pin CANL of the CAN transceiver chip U3 is connected to the connection socket, and the 7-pin CANH is connected to the connection socket.
Referring to fig. 7, the excitation output module is composed of a MOS transistor Q3 controlling the +24vin terminal of the external breaking power supply, a transistor Q6, a MOS transistor Q5 controlling the grounding terminal of the external breaking power supply, and an auxiliary circuit. The source electrode of the MOS tube Q3 is connected with the +24VIN end of an external breaking power supply, the grid electrode of the MOS tube Q3 is connected with the collector electrode of the triode Q6, and the drain electrode of the MOS tube Q3 is connected with the OUT1+ end of the wiring socket. In addition, the source electrode of the MOS transistor Q3 is connected in series with a current limiting resistor R9 and then connected with the collector electrode of the triode Q6. The base electrode of the triode Q6 is connected with a current limiting resistor R8 in series and then is connected with the 16 pin of the CPU chip U1, and the emitter electrode of the triode Q6 is grounded. The base electrode of the MOS tube Q5 is connected with a current limiting resistor R15 in series and then is connected with the 25 pins of the CPU chip U1, the source electrode of the MOS tube Q5 is grounded, and the drain electrode is connected with the OUT 1-end of the wiring socket. The OUT1+ end and the OUT 1-end are connected with an electronic breaking trigger of the intelligent fuse.
During operation, the data processing module is reset at the beginning of power-on, the connection states of the current detection module, the excitation output module and the intelligent fuse electronic breaking trigger are self-checked, whether the functional state is normal is checked, and detection data is calculated after being sampled by the 21-pin AIN3 end of the CPU chip U1. After passing the self-check, the device enters normal operation, and the 2 Hall current sensor chips U5 and U7 detect the magnetic field intensity at the air gap between the two U-shaped magnetic cores through the Hall effect principle to generate induced voltage. The two output terminals VIN1+ and VIN2+ divide the voltages detected by the two output terminals VIN1+ and VIN2+ respectively through R23 and R25, and then input the divided voltages to pins 2 AIN1 and 3 AIN2 of the CPU chip U1. The voltage signal is calculated and processed after high-speed AD sampling of the CPU chip. The temperature detection module converts the detected temperature data into a voltage signal through the temperature test chip U6 and inputs the voltage signal to the 14 pins DS18B20 of the CPU chip U1. The CPU chip U1 is used for uploading current, temperature and state data sampled by the high-speed AD through the DA conversion to the upper computer through the CAN bus module, so that real-time detection and monitoring are realized. When the detected current value reaches a preset threshold value and lasts for a prescribed time, the 16-pin ALM0 of the CPU chip U1 continuously outputs a high level, and the triode Q6 and the MOS tube Q3 which are grounded of the electronic breaking trigger OUT1 are controlled to be conducted. The 25-pin ALM1 outputs 3 continuous pulse signals, controls the intermittent conduction of the electronic breaking trigger OUT < 1+ > and the positive electrode of the external DC24V breaking power supply, so that 3 continuous pulse signals flow through the end of the electronic breaking trigger OUT < 1+ > and UOT < - > of the intelligent fuse connected in series with the external DC24V breaking power supply, a trigger signal is provided for the electronic breaking trigger of the intelligent fuse, and the electronic breaking trigger detonates the breaker of the intelligent fuse with the gunpowder to actively break a circuit. When the 21-pin AIN3 end of the CPU chip U1 detects a breaking signal hard-wired with an external DC24V breaking signal source, the 16-pin ALM0 of the CPU chip U1 continuously outputs a high level, controls the triode Q6 and the MOS tube Q3 of the electronic breaking trigger UOT-grounding end to be conducted, enables the external DC24V breaking signal to flow through the electronic breaking trigger OUT1 < + > and UOT < 1 > -end and then directly reach the ground to complete a closed loop, and triggers the electronic breaking trigger and detonates a breaker of an intelligent fuse with gunpowder to break the circuit.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (12)
1. The control method of the electronic detection controller for the intelligent fuse is characterized by comprising the following steps of:
collecting current data in a branch circuit of the intelligent fuse in real time;
when the current data reaches a preset threshold value and lasts for a prescribed time, or when the intelligent fuse receives a breaking signal sent by an external breaking signal source, the electronic breaking trigger of the intelligent fuse is triggered by a P mos tube and an N mos tube which are respectively connected with two input ends of the electronic breaking trigger, and the electronic breaking trigger detonates a breaker of the intelligent fuse with gunpowder inside to break a circuit.
2. The control method of an electronic detection controller for an intelligent fuse according to claim 1, further comprising: temperature compensation is carried out on the current data, and the method comprises the following steps:
testing and determining the corresponding relation between the current data flowing through the current detection sensor and the actual load current in the intelligent fuse circuit under different environment temperatures;
collecting current data and environmental temperature data of a branch line of the intelligent fuse in real time;
and determining the actual load current corresponding to the current data at the ambient temperature according to the corresponding relation between the current data and the actual load current, and taking the actual load current as the compensated current data.
3. The control method of an electronic detection controller for an intelligent fuse according to claim 2, wherein the acquisition of the correspondence relationship between the current data flowing through the current detection sensor and the actual load current in the intelligent fuse circuit includes the steps of:
the current detection sensor is arranged in an ambient temperature range required by the intelligent fuse circuit;
determining the size of the temperature steps according to the precision requirement, and carrying out multiple current detection tests in each temperature step:
determining a load current range according to the current range of the intelligent fuse circuit;
inputting load current to the current detection sensors, and obtaining real-time current data detected by the current detection sensors corresponding to each load current every time when the preset load current is increased;
and (3) performing unitary linear fitting on a plurality of groups of real-time current data and actual load current through a least square method to obtain the corresponding relation between the current data flowing through the current detection sensor and the actual load current under the temperature step.
4. An electronic detection controller for an intelligent fuse, comprising:
the current detection module is used for collecting current data in a branch circuit of the intelligent fuse in real time;
the data processing module is used for receiving the current data of the current detection module, and sending a breaking signal when the current data reaches a preset threshold value and lasts for a specified time or when the intelligent fuse receives the breaking signal sent by an external breaking signal source;
the excitation output module receives the breaking signal sent by the data processing module and triggers an electronic breaking trigger of the intelligent fuse, and the electronic breaking trigger detonates a breaker of the intelligent fuse with gunpowder inside to break a circuit; the excitation output module comprises a P mos tube and an N mos tube which are respectively connected with two input ends of the electronic breaking trigger;
further comprises: a state self-checking module;
the state self-checking module detects the working states of the current detection module and the excitation output module and the states of the external breaking signal source in real time to obtain analog signals, processes the analog signals through the data processing module, judges whether faults occur or not, and calculates to obtain fault codes.
5. The electronic detection controller for an intelligent fuse according to claim 4, further comprising: a temperature detection module;
the temperature detection module is used for detecting the environmental temperature data of the branch circuit of the intelligent fuse in real time.
6. The electronic detection controller for an intelligent fuse according to claim 5, wherein the data processing module receives the ambient temperature data detected by the temperature detection module and the detected current data detected by the current detection module, determines an actual load current corresponding to the current data at the ambient temperature according to a correspondence relationship between the current data and the actual load current, and uses the actual load current as the compensated current data.
7. The electronic detection controller for an intelligent fuse according to claim 4, wherein the current detection module comprises a current sensor chip; the current sensor chip comprises any one of a Hall current sensor, a mutual inductor and a shunt.
8. The electronic detection controller for an intelligent fuse according to claim 4, wherein the state self-checking module acquires a connection state of an excitation output end of the excitation output module and an electronic breaking trigger and determines whether the excitation output module is in an output state when detecting an operation state of the excitation output module in real time.
9. The electronic detection controller for an intelligent fuse according to claim 5, further comprising: a communication module;
the communication module is used for data communication between the data processing module and the upper computer and transmitting current data and fault codes to the upper computer.
10. The electronic detection controller for a smart fuse of claim 9, wherein the communication module comprises a CAN transceiver chip.
11. The electronic detection controller for an intelligent fuse of claim 9, further comprising a power module; the power supply module comprises a first output end, a second output end, a third output end and a fourth output end;
the first output end is electrically connected with the data processing module; the second output end is electrically connected with the current detection module and supplies power for the current detection module; the third output end is electrically connected with the temperature detection module and supplies power for the temperature detection module; the fourth output end is electrically connected with the communication module and supplies power for the communication module.
12. The electronic detection controller for a smart fuse of claim 11, wherein the power module comprises a DC-DC power chip.
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