Motor protection device supporting distributed electrical fire monitoring and detection

Abstract

The utility model discloses a motor protection device supporting distributed electrical fire monitoring and detection. The motor protection device comprises a display module used for displaying electrical fire monitoring and detection information, a main body module used for realizing motor control and protection, a fire protection loop used for monitoring hidden dangers around a motor, and a motor loop used for monitoring wire inlet current of the motor. The display module integrates an electrical fire monitoring function, keeps a small size and an embedded installation mode of a conventional motor display module, and does not occupy other space in the cabinet. According to the utility model, while the motor is controlled and protected, high-risk fire hazard points near the running motor are monitored through the display module, and when a power failure is caused by a fire hazard, a power supply provided by the main body integrated energy storage module is obtained, so that stable alarm and uploading are ensured when the power supply is lost; the data of each high-risk hidden danger point near the motor can be stably uploaded through a bus, and the operation reliability of the motor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor protection technical field, concretely relates to a motor protection device of support distributed electrical fire monitoring and detection. BACKGROUND

[0002] Electrical fire monitoring and detection device is a kind of device for monitoring potential fire hazards in electrical lines and equipment, it can discover abnormal conditions in time and issue an alarm before electrical fire occurs, so that effectively prevent the occurrence of electrical fire. With the rapid development of fire industry, electrical fire detection technology is also constantly progressing, and forms the electrical fire detector of various structures.

[0003] There is a kind of typical electrical fire detector for motor protection on the market, to ensure that it can monitor fire in a large range, it is installed in the form of guide rail to expand the detection range as far as possible, some manufacturers add reciprocating screw rod, although it realizes the function of monitoring fire in a large range, but it occupies too much space in cabinet, and the fixed way using screw leads to difficult installation and removal, which is not conducive to motor manufacturers to prevent fire. Some manufacturers have simplified the device, and added independent power supply when power is cut off due to fire, but it is still difficult to disassemble, and the independent power supply device also occupies space in cabinet, which is not conducive to the maintenance and use of manufacturers. In addition, the existing electrical fire monitoring and detection device has weak resistance to power failure caused by fire, it cannot realize stable alarm and upload of fire information when it loses power supply due to the influence of fire, and its reliability is poor. CONTENT OF UTILITY MODEL

[0004] In order to solve the above problems, the utility model provides a kind of motor protection device of support distributed electrical fire monitoring and detection, to overcome the drawbacks of large space occupation, difficult disassembly and poor reliability of existing electrical fire detector. The specific technical scheme is as follows:

[0005] The utility model provides a kind of motor protection device supporting distributed electrical fire monitoring detection, including display module for electrical fire monitoring detection information display, main module for realizing motor control and protection, fire-fighting loop for monitoring hidden danger around motor, motor loop for monitoring motor incoming line current;The display module includes single-chip microcontroller, leakage measurement module, temperature measurement module, sound-light alarm device and display liquid crystal connected respectively in the single-chip microcontroller of the display module, the main module includes single-chip microcontroller, and the acquisition module for motor current acquisition and the energy storage module for emergency power supply of the main module and display module are connected respectively in the single-chip microcontroller of the main module, the display module is connected with the main module by communication module, and the display module and main module are also connected to bus respectively;Wherein, the fire-fighting loop connects the temperature measurement module in the display module, and the fire-fighting loop is also connected with the leakage measurement module in the display module by leakage detection current transformer, and the motor loop is connected with the acquisition module on the main module by motor current detection transformer;The display module realizes the on-off control of the fire-fighting loop by fire-fighting loop switch, and the main module realizes the on-off control of the motor loop by motor loop switch.

[0006] Preferably, the display module is arranged in order from front to back according to the front shell assembly, the first circuit board, the second circuit board, the third circuit board, the rear shell assembly and the protective cover;The temperature measurement module is a multi-channel temperature measurement module for fire monitoring, and the leakage measurement module is a single-channel leakage measurement module for leakage detection of the fire-fighting loop, and the multi-channel temperature measurement module and the single-channel leakage measurement module are arranged on the first circuit board of the display module. The single-channel leakage measurement module is provided with a leakage current acquisition terminal.

[0007] Preferably, the sound-light alarm device includes a buzzer and an alarm indicator, and the buzzer and the alarm indicator are arranged on the second circuit board, and the display liquid crystal and the programmable setting button are arranged between the buzzer and the alarm indicator;The third circuit board is provided with an American power supply terminal, a communication module connected with the main module, and a link controller for turning off the fire-fighting loop switch when monitoring fire hazards.

[0008] In the utility model, the first circuit board and the third circuit board are connected with the second circuit board through connectors respectively, the front shell assembly and the rear shell assembly are connected with each other through buckles respectively, and the rear shell assembly and the protective cover are connected with each other through buckles respectively, and are fixed in the external cabinet through the buckles.

[0009] The utility model discloses a main body module includes the upper shell subassembly and lower shell subassembly through the buckle upper and lower joint connection and sets up the fourth circuit board, the fifth circuit board and the sixth circuit board in the inside of the upper shell subassembly and lower shell subassembly joint connection, the fourth circuit board with the fifth circuit board between, the fifth circuit board and the sixth circuit board between fixed connection through the pin respectively.

[0010] The utility model discloses a fourth circuit board is arranged with the communication port of the display module interaction, the communication terminal of access bus and the interface of extension module, the fourth circuit board still is arranged with the motor current acquisition terminal for motor current detection, the motor current acquisition terminal passes through the motor current detection mutual inductor and accesses the motor loop.

[0011] The utility model discloses a fifth circuit board is provided with on -off value input port and receives external control instruction through the on -off value input port, the sixth circuit board is provided with motor loop switch and whether the motor loop is tripped through the motor loop switch control, the energy storage module still includes the super energy storage capacitor integrated on the sixth circuit board.

[0012] The fourth circuit board of above-mentioned main body module is arranged with the communication port of display unit interaction, the communication terminal of access bus, the interface of extension module and the terminal of current acquisition, and the current acquisition terminal passes through the mutual inductor and accesses the motor loop, and the fifth circuit board receives external control instruction through the on -off value, and the sixth circuit board controls whether the motor loop is tripped, and the super energy storage capacitor is integrated, and the super energy storage capacitor can provide enough power supply under the external interference power failure to guarantee normal power supply, and can provide enough power supply for the display module through the communication port for the display module with the display module interaction when the fire disconnects the circuit, guarantees the effective work of audible and visual alarm, and safe, reliable is used.

[0013] A kind of overall technical scheme of motor protection device supporting distributed electrical fire monitoring detection, incoming line motor is equipped with the motor loop of protection control motor and the fire-fighting loop of monitoring fire hazard around motor, motor loop passes through mutual inductor and accesses the acquisition module in main body module, and according to motor electric signal, the motor loop is switched controlled, simultaneously, motor electric parameter data is uploaded to bus to user terminal by communication module.

[0014] Fire-fighting loop passes through mutual inductor and accesses the leakage measurement module of display module, and passes through temperature measurement resistance and accesses the temperature measurement module of display module;Display module is also equipped with communication module, and accesses bus and uploads fire-fighting data to user terminal, and generates corresponding audible and visual alarm.

[0015] The display module and the main body exchange data through respective communication modules, and when the device loses power due to fire damage to the fire circuit or other power loss factors, the energy storage module of the main body module is released and provides stable working voltage for the display module through the communication module.

[0016] The display module further adds fire circuit monitoring, including leakage and temperature monitoring, wherein the leakage supports short circuit detection, ensures normal fire detection function, is high in safety, and adopts multi-path chip concurrent monitoring, is small in occupied space, and is low in cost.

[0017] In the utility model, the leakage measurement module includes leakage detection circuit between leakage detection current transformer and single-chip microcomputer of display module, leakage detection circuit includes leakage current access line AI 5 and VREF_COM connected with leakage detection current transformer, magnetic bead FB6 is arranged on leakage current access line AI 5, and clamping diode D5 and resistance R1 are connected in parallel after magnetic bead FB6, and resistance R19 and capacitor C27 for RC filtering are connected in parallel between leakage current access line AI 5 and ground terminal GND, then Vref direct current signal required by single-chip microcomputer of display module is output on leakage signal output line AD_AI5 through resistance R38 at the output end of secondary operational amplifier IC3A after sequentially passing through primary operational amplifier IC3B and secondary operational amplifier IC3A arranged on leakage current access line AI 5, wherein the connection end of resistance R1 on leakage current access line AI 5 is further connected with resistance R5 and clamping diode D6 in sequence, one diode in clamping diode D6 is grounded, another diode is loaded with positive voltage, and short circuit and open circuit detection line AD_IL for judging whether the line connected with leakage detection current transformer is short-circuited or disconnected is led between resistance R5 and clamping diode D6.

[0018] Preferably, the temperature measuring module comprises a fire monitoring temperature measuring circuit arranged between the fire-fighting circuit and a single-chip microcomputer of the display module, the fire monitoring temperature measuring circuit comprises a plurality of temperature measuring channel signals AT_1 to AT_4 from the fire-fighting circuit, a temperature measuring channel signal processing circuit for processing the temperature measuring channel signals, the temperature measuring channel signal processing circuit comprises a multipath channel selection chip U1 and an operational amplifier IC1B, each temperature measuring channel signal AT_1 to AT_4 is connected with each input interface of the multipath channel selection chip U1, respectively, an output interface X of the multipath channel selection chip U1 is connected with a non-inverting input terminal of the operational amplifier IC1B through a resistor R28, a capacitor C19 is connected between the non-inverting input terminal and an inverting input terminal of the operational amplifier IC1B, the inverting input terminal of the operational amplifier IC1B is connected to an output terminal of the operational amplifier IC1B, and an output terminal signal X1 of the operational amplifier IC1B is connected to the single-chip microcomputer of the display module through a resistor R31.

[0019] Preferably, the energy storage module in the main body module comprises a super energy storage capacitor, the super energy storage capacitor is connected to a line abnormal emergency power supply circuit through a communication connector J2, the line abnormal emergency power supply circuit comprises magnetic beads L3 and L4 connected with the communication connector J2 and arranged in parallel, a capacitor C17 is arranged between the magnetic beads L3 and L4 and on the front side of the communication connector J2, a zener diode D1, a polarity capacitor C16 and a capacitor C15 are arranged on the rear side between the magnetic beads L3 and L4 in sequence, an output terminal of the magnetic bead L3 outputs a 5V voltage for emergency power supply, and an output terminal of the magnetic bead L4 is grounded; the communication connector J2 further leads out differential lines A and B, the differential lines A and B are grounded through crystal filters L2 and L1 at the connection ends of the communication connector J2, respectively, resistors R35 and R36 are arranged on the differential lines A and B, respectively, and an ESD diode D10 is connected between output terminals of the differential lines A and B.

[0020] The utility model discloses the beneficial effect is:

[0021] Firstly, the utility model relates to a motor protection device supporting distributed electrical fire monitoring and detection, the display module integrates electrical fire monitoring function, and the conventional motor display module is kept small and exquisite, embedded installation mode, without occupying other cabinet space, overcome the space occupied by the guide rail type installation, screw fixing mode of conventional electrical fire monitoring and detection device brings the malpractice of difficult disassembly.

[0022] Second, the utility model discloses a kind of motor protection device of supporting distributed electrical fire monitoring and detection, line abnormal emergency power supply circuit is provided in main module, it is still able to provide enough power under external interference power failure by integrated setting super energy storage capacitor and corresponding circuit design on sixth circuit board;And control module controls protection motor, while, display module monitors the high-risk fire hazard point near operating motor, obtains the power provided by main integrated energy storage module when fire causes power failure, ensure stable alarm and upload when losing power supply, the data of each high-risk hazard point near motor can be stably uploaded through bus, improve motor operation reliability.

[0023] Third, the utility model discloses a kind of motor protection device of supporting distributed electrical fire monitoring and detection, acquisition module for motor current acquisition is provided on main module, leakage measurement module and multichannel temperature measurement module are provided on display module, main module is accessed mutual inductor monitoring and protects motor normal operation, display module monitors motor peripheral temperature and leakage current to prevent motor out of control and cause fire, fire information of display module and motor protection information of main module are uploaded bus simultaneously, realize the dual function of control motor and prevent fire, integrated design makes that protection device has the advantages of small space occupation, low cost, safety.

[0024] Fourth, the utility model discloses a kind of motor protection device of supporting distributed electrical fire monitoring and detection, feedback voltage stabilizing chip and corresponding voltage stabilizing circuit structure are used in power supply circuit for display module power supply, can improve the stability of power supply voltage, to improve the reliability of circuit work. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the appearance structure schematic diagram (explosion diagram) of display module in a kind of motor protection device of supporting distributed electrical fire monitoring and detection of the utility model;

[0026] Figure 2 It is the appearance structure schematic diagram (explosion diagram) of main part of a kind of motor protection device of supporting distributed electrical fire monitoring and detection of the utility model;

[0027] Figure 3 It is the overall structure principle block diagram of a kind of motor protection device of supporting distributed electrical fire monitoring and detection of the utility model;

[0028] Figure 4 It is the circuit schematic diagram of acquisition module for motor current acquisition;

[0029] Figure 5 It is the power supply circuit schematic diagram for display module power supply;

[0030] Figure 6is the communication circuit schematic view of the communication module in the main body module;

[0031] Figure 7 is the schematic view of the emergency power supply circuit of the line abnormality arranged in the main body module;

[0032] Figure 8 is the circuit schematic view of the multi-way temperature measurement module arranged in the display module;

[0033] Figure 9 is the circuit schematic view of the leakage measurement module arranged in the display module.

[0034] In the figure: 1, front shell assembly, 2, first line board, 3, second line board, 4, third line board, 5, rear shell assembly, 6, buckle, 7, protective cover, 9, upper shell assembly, 11, sixth line board, 12, fifth line board, 13, fourth line board, 14, lower shell assembly, 15, buckle, 101, liquid crystal for display, 102, buzzer, 103, communication network port, 104, American power supply terminal, 105, temperature measurement module terminal, 106, leakage current acquisition terminal, 107, button, 108, alarm indicator, 109, communication module, 110, link controller, 120, communication port, 121, communication terminal, 122, interface of extension module, 123, motor current acquisition terminal, 124, super energy storage capacitor. DETAILED DESCRIPTION

[0035] The specific implementation of the present application will be further described in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the present application, and cannot limit the protection scope of the present application.

[0036] As Figures 1 to 9The utility model discloses a kind of motor protection devices of supporting distributed electrical fire monitoring and detection, including display module for electrical fire monitoring and detection information display, for realizing motor control and protection main module, for monitoring fire-fighting loop of hidden danger around motor, for monitoring motor incoming line current motor loop;The display module includes single-chip microcontroller, leakage measurement module, temperature measurement module, audible and visual alarm device and display liquid crystal respectively connected in the single-chip microcontroller of the display module, the main module includes single-chip microcontroller, and the acquisition module for motor current acquisition and the energy storage module for emergency power supply of the main module and display module are connected respectively in the single-chip microcontroller of the main module, the display module is connected with the main module between by communication module, the display module and main module are also connected to bus respectively;Wherein, the fire-fighting loop connects the temperature measurement module in the display module, the fire-fighting loop is also connected with the leakage measurement module in the display module by leakage detection current transformer, the motor loop is connected on the acquisition module of the main module by motor current detection mutual inductor;The display module realizes the switch control of the fire-fighting loop by fire-fighting loop switch, the main module realizes the switch control of the motor loop by motor loop switch.

[0037] Preferably, the display module is arranged in order from front to back according to the front shell assembly 1, the first circuit board 2, the second circuit board 3, the third circuit board 4, the rear shell assembly 5 and the protective cover 7; the temperature measurement module is a multi-channel temperature measurement module 105 for fire monitoring, the leakage measurement module is a leakage measurement module for leakage detection of the fire-fighting loop, and the multi-channel temperature measurement module 105 and the leakage measurement module are arranged on the first circuit board of the display module. The leakage current acquisition terminal 106 is arranged on the leakage measurement module.

[0038] Preferably, the audible and visual alarm device includes a buzzer 102 and an alarm indicator 108, and the buzzer 102 and the alarm indicator 108 are arranged on the second circuit board 3, and the display liquid crystal 101 and the programmable setting button 107 are arranged between the buzzer 102 and the alarm indicator 108; an American power supply terminal 104 and a communication module 109 connected to the main module communication are arranged on the third circuit board 4, and a link controller 110 for turning off the fire-fighting loop switch when a fire hazard is detected is also arranged on the third circuit board 4.

[0039] In the embodiment, the first circuit board 2 and the third circuit board 4 are connected to the second circuit board 3 through connectors, the front shell assembly 1 and the rear shell assembly 5 are connected through buckles 6, and the rear shell assembly 5 and the protective cover 7 are connected through buckles 6 and fixed in the external cabinet.

[0040] like Figure 1 As shown, in the display module used for motor control and protection, the first circuit board 2 has terminals 105 for a multi-channel temperature measurement module for fire monitoring and a leakage current acquisition terminal 106 for a leakage current module, as well as a communication network port 103 connecting to the main module. The second circuit board 3 has a buzzer 102 and an alarm indicator light 108 forming an audible and visual alarm device for fire hazards, with an LCD 101 for display and programmable buttons 107 arranged in the middle. The third circuit board has an American power supply terminal 104, a communication module 109 for communication with the main module, and a link controller 110 that cuts off the link when a hazard is detected.

[0041] In this embodiment, the display module communicates with the main module via the communication network port 103 through the button 107 and the LCD 101. This provides interactive functions for the control / protection of the main module. At the same time, the temperature and leakage current are collected through the terminals 105 of the multi-channel temperature measurement module and the leakage current acquisition terminal 106 to monitor potential hazards. This provides audible and visual alarms (buzzer 102, alarm indicator 108) and the link is cut off by the controller 110.

[0042] In this embodiment, the main module is installed by snap-fit ​​15, and its upper shell assembly 9 and lower shell assembly 14 are connected vertically. The upper shell assembly 9 and lower shell assembly 14 are internally provided with a fourth circuit board 13, a fifth circuit board 12 and a sixth circuit board 11. The fourth circuit board 13 and the fifth circuit board 12, and the fifth circuit board 12 and the sixth circuit board 11 are respectively fixedly connected by pins.

[0043] In this embodiment, the fourth circuit board 13 is provided with a communication port 120 for interacting with the display module, a communication terminal 121 for accessing the bus, and an interface 122 for the expansion module; the fourth circuit board 13 is also provided with a motor current acquisition terminal 123 for motor current detection, and the motor current acquisition terminal 123 is connected to the motor circuit through the motor current detection transformer.

[0044] In this embodiment, the fifth circuit board 12 is provided with a switch input port and receives external control commands through the switch input port; the sixth circuit board 11 is provided with a motor circuit switch and controls whether the motor circuit is tripped through the motor circuit switch; the energy storage module also includes a super energy storage capacitor 124 integrated on the sixth circuit board 11.

[0045] like Figure 2The fourth circuit board 13 is arranged with a communication port 120 for interacting with the display unit, a communication terminal 121 for accessing the bus, an interface 122 for extending the module, and a terminal 123 for collecting current. The current collecting terminal 123 is connected to the motor circuit through a mutual inductor. The fifth circuit board 12 receives external control instructions through a switching value. The sixth circuit board 11 controls whether the motor circuit is tripped, and integrates a super energy storage capacitor 124. The super energy storage capacitor 124 can provide sufficient power supply to ensure normal power supply under external interference power failure, and can provide sufficient power supply to the display module through the communication port 120 on the fourth circuit board 13 for interacting with the display module when the line is disconnected in a fire, to ensure the effective work of the sound and light alarm, safe and reliable.

[0046] As shown in Figure 3 The overall technical scheme of the motor protection device supporting distributed electrical fire monitoring and detection is shown. The incoming motor is provided with a motor circuit for protecting and controlling the motor and a fire-fighting circuit for monitoring fire hazards around the motor. The motor circuit is connected to the collection module in the main module through a mutual inductor, and the motor circuit is controlled by a switch according to the motor electrical signal. At the same time, the communication module is used to upload the motor electrical parameter data to the bus to the user terminal.

[0047] The fire-fighting circuit is connected to the leakage measurement module of the display module through a mutual inductor, and is connected to the temperature measurement module of the display module through a temperature measurement resistor. The display module is also provided with a communication module and is connected to the bus to upload fire-fighting data to the user terminal and generate corresponding sound and light alarms.

[0048] The display module and the main body exchange data through their respective communication modules. When the device loses power due to fire damage to the fire-fighting circuit or other power loss factors, the energy storage module of the main module is released and provides stable working voltage for the display module through the communication module.

[0049] As shown in Figure 4 As shown in the circuit of the collection module for motor current collection of the embodiment, the main module uses a direct collection method for collecting motor current through the collection module. The specific collection method is as follows: the collected signal enters from the circuit SIG-IA2, is clamped by the TVS tube of D10, and then the SIG-IA signal after the IC6 multi-channel operational amplifier chip is clamped by D11, is divided by R102, R49 and R30, and then enters the single-chip microcomputer of the main module through the L6 magnetic bead and C35 and C36 filters to realize direct collection. Direct collection has the advantages of high efficiency and good real-time performance.

[0050] As shown in Figure 5As shown, the display module of this embodiment has its own power supply module. In the power supply circuit of the display module, the mains power is connected to LN, protected by thermistors 1 and 3, filtered by L1, rectified by BR1, and regulated by the feedback voltage regulator IC2. The output of transformers 9 and 10 of T1 is then converted by level U1 to provide 5V power to the main module. The output of transformers 4 and 5 of T1 provides power to the external communication module. This device has multiple power supply channels, making customer wiring more flexible.

[0051] like Figure 6 As shown, the working principle of the communication circuit of the communication module used for external communication in the main module of this embodiment is as follows: U3 is another 5V power supply branched off from the display module. The differential lines A1 and B1 connected to the bus are protected by thermistors PT1 and PT2, clamping diode D3, and TVS diode D4 before entering the communication chip IC6. IC5 provides capacitive isolation protection to the MCU transceiver pins, and U2 provides optocoupler isolation to the enable pin. Capacitive and optocoupler isolation prevents external high voltage from damaging the microcontroller and also prevents external signals from interfering with the microcontroller's operation, ensuring high safety.

[0052] Based on the traditional split motor protector, this embodiment adds fire circuit monitoring to the display module, including leakage current and temperature monitoring. The leakage current supports short circuit detection, ensuring normal fire detection function and high safety. The temperature is monitored by multiple chips in parallel, which takes up little space and has low cost.

[0053] In the embodiment, the leakage current measuring module comprises a leakage detection circuit arranged between the leakage detection current transformer and the single-chip microcomputer of the display module. The leakage detection circuit comprises a leakage current access line AI_5 and VREF_COM connected with the leakage detection current transformer. A magnetic bead FB6 is arranged on the leakage current access line AI_5. A clamping diode D5 and a resistor R1 are connected in parallel in sequence between the AI_5 and VREF_COM after the magnetic bead FB6. A resistor R19 and a capacitor C27 for RC filtering are connected in parallel between the leakage current access line AI_5 and a ground terminal GND. Then, a Vref direct current signal required by the single-chip microcomputer of the display module is output on a leakage signal output line AD_AI5 through a resistor R38 at an output terminal of the secondary operational amplifier IC3A after sequentially passing through a first operational amplifier IC3B and a second operational amplifier IC3A arranged on the leakage current access line AI_5. One of the clamping diodes D6 is grounded, and the other clamping diode is loaded with a positive voltage. A short-circuit and open-circuit detection line AD_IL for judging whether a line connected with the leakage detection current transformer is short-circuited or open-circuited is led out between the resistor R5 and the clamping diode D6.

[0054] As shown in Figure 9 The leakage detection circuit is shown in the figure. D5 is used for circuit protection. The AI sampling terminal is connected with a transformer. The transformer is filtered through the access magnetic bead FB6. The filtered signal is processed by the first operational amplifier IC3 of the 5-pin. The 7-pin outputs a signal. The signal is processed by the second operational amplifier IC3 of the 3-pin. Finally, the leakage signal is output by the 1-pin. The leakage current measuring module also supports short-circuit and open-circuit detection.

[0055] When the line is open-circuited, AI5 is Vref. The Vref direct current signal is output on the AD_AI5 through the two times of operational amplification of IC3B and IC3A. When the transformer is connected, the sudden change signal of AD_IL from pull-down to pull-up is hindered by the access coil. A gradually pull-down curve signal is output on the AD_AI5.

[0056] When the line is short-circuited, AD_IL is pulled down. The VREF is divided by R1 and D5 and R5. Then, the divided voltage is input into IC3. When the transformer is connected, R1 and D5 are connected in parallel with the transformer. The voltage divided by IC3 is larger than that when the transformer is not connected. Whether the short circuit is generated is determined.

[0057] When the display module identifies the short-circuit and open-circuit signals, an audible and visual alarm is generated to indicate the user. The record is uploaded. The reliability of the fire monitoring is increased.

[0058] Preferably, the temperature measuring module comprises a fire monitoring temperature measuring circuit arranged between the fire-fighting circuit and the single-chip microcomputer of the display module, the fire monitoring temperature measuring circuit comprises a plurality of temperature measuring channel signals AT_1~AT_4 from the fire-fighting circuit, a temperature measuring channel signal processing circuit for processing the temperature measuring channel signals, the temperature measuring channel signal processing circuit comprises a multipath channel selection chip U1 and an operational amplifier IC1B, each temperature measuring channel signal AT_1~AT_4 is connected to each input interface of the multipath channel selection chip U1, the output interface X of the multipath channel selection chip U1 is connected to the non-inverting input terminal of the operational amplifier IC1B through the resistor R28, the capacitor C19 is connected between the non-inverting input terminal and the inverting input terminal of the operational amplifier IC1B, the inverting input terminal of the operational amplifier IC1B is connected to the output terminal of the operational amplifier IC1B, and the output signal X1 of the operational amplifier IC1B is connected to the single-chip microcomputer of the display module through the resistor R31.

[0059] As shown in Figure 8 The display module is provided with a temperature measuring circuit for fire monitoring, the temperature measuring channel AT1 is connected to the magnetic bead FB3 filter, the D1 voltage stabilizer is added, the R41, R13 and C2 are filtered, the channel X3 of the multipath channel selection chip U1 is connected, the corresponding channel output is selected to X through the MCU input AB, the output is output to ADX1 through the IC1B operational amplifier, and the actual temperature measurement is obtained, wherein the multipath temperature measurement is calculated through the selection chip, the occupied space is small, and the cost is low.

[0060] Preferably, the energy storage module in the main body module comprises a super energy storage capacitor, the super energy storage capacitor is connected to the line abnormal emergency power supply circuit through the communication connector J2, the line abnormal emergency power supply circuit comprises the magnetic beads L3 and L4 connected with the communication connector J2 and arranged in parallel, the capacitor C17 is arranged between the magnetic beads L3 and L4 and on the front side of the communication connector J2, the voltage stabilizing diode D1, the polar capacitor C16 and the capacitor C15 are arranged in sequence on the rear side between the magnetic beads L3 and L4, the output end of the magnetic bead L3 outputs a 5V voltage for emergency power supply, and the output end of the magnetic bead L4 is grounded; the communication connector J2 further leads out the differential lines A and B, the differential lines A and B are grounded through the crystal filters L2 and L1 at the connection ends of the communication connector J2 respectively, the resistors R35 and R36 are arranged on the differential lines A and B respectively, and the ESD diode D10 is connected between the output ends of the differential lines A and B.

[0061] The line abnormal emergency power supply circuit can still work normally when the power supply line is abnormal. Figure 7As shown, the main module is equipped with the energy storage super capacitor 124 release, the main module obtains the power supply by the communication connector J2, and is transmitted to 5V and GND through L3, L4 magnetic beads and voltage stabilizing diode D11, is accessed to the display module main 5V, makes the display module power supply normal.A, B differential line is discharged through L1, L2 respectively, is protected through ESD diode D10, is accessed to the single-chip microcomputer MCU of the main module through the communication module IC2.At this time, under the power supply of the energy storage capacitor of the main module, the display module normally monitors the temperature, and once there is a fire omen, immediately reports the user on the bus through the communication module, and has enough energy to produce sound and light alarm, and good robustness.

[0062] The preferred embodiments of the present application are described above, it should be pointed out that, for those skilled in the technical field, without departing from the technical principles of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A motor protection device supporting distributed electrical fire monitoring and detection, characterized in that, The system includes a display module for displaying electrical fire monitoring and detection information, a main module for motor control and protection, a fire alarm circuit for monitoring potential hazards around the motor, and a motor circuit for monitoring the motor's input current. The display module includes a microcontroller, a leakage current measurement module, a temperature measurement module, an audible and visual alarm device, and a liquid crystal display (LCD) connected to the microcontroller. The main module includes a microcontroller, a data acquisition module for acquiring motor current connected to the microcontroller, and an energy storage module for emergency power supply to both the main module and the display module. The display module and the main module are connected via a communication module and are also connected to a bus. The fire alarm circuit is connected to the temperature measurement module in the display module and is also connected to the leakage current measurement module in the display module via a leakage current detection current transformer. The motor circuit is connected to the data acquisition module on the main module via a motor current detection current transformer. The display module controls the fire alarm circuit via a fire alarm circuit switch, and the main module controls the motor circuit via a motor circuit switch.

2. The motor protection device supporting distributed electrical fire monitoring and detection according to claim 1, characterized in that, The display module is arranged from front to back in the following order: front shell assembly, first circuit board, second circuit board, third circuit board, rear shell assembly, and protective cover. The temperature measurement module is a multi-channel temperature measurement module for fire monitoring, and the leakage current measurement module is a single-channel leakage current measurement module for detecting leakage current in the fire circuit. Both the multi-channel temperature measurement module and the single-channel leakage current measurement module are arranged on the first circuit board of the display module.

3. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 2, characterized in that, The audible and visual alarm device includes a buzzer and an alarm indicator light, both of which are arranged on the second circuit board. The display LCD and programmable buttons are arranged between the buzzer and the alarm indicator light. The third circuit board is provided with an American power supply terminal, a communication module connected to the main module, and a link controller for cutting off the fire circuit switch when a fire hazard is detected.

4. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 2, characterized in that, The first circuit board and the third circuit board are respectively connected to the second circuit board through connectors. The front shell assembly and the rear shell assembly, and the rear shell assembly and the protective cover are respectively connected by buckles and fixed to the external cabinet by the buckles.

5. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 1, characterized in that, The main module includes an upper shell assembly and a lower shell assembly connected by snap fasteners, and a fourth circuit board, a fifth circuit board, and a sixth circuit board disposed inside the connected upper shell assembly and lower shell assembly. The fourth circuit board and the fifth circuit board, and the fifth circuit board and the sixth circuit board are respectively fixedly connected by pins.

6. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 5, characterized in that, The fourth circuit board is provided with a communication port for interacting with the display module, a communication terminal for accessing the bus, and an interface for the expansion module; the fourth circuit board is also provided with a motor current acquisition terminal for motor current detection, which is connected to the motor circuit through the motor current detection transformer.

7. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 5, characterized in that, The fifth circuit board is provided with a digital input port and receives external control commands through the digital input port; the sixth circuit board is provided with a motor circuit switch and controls whether the motor circuit trips; the energy storage module also includes a super energy storage capacitor integrated on the sixth circuit board.

8. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 1, characterized in that, The leakage current measurement module includes a leakage current detection circuit that connects the leakage current detection current transformer and the microcontroller of the display module. The leakage current detection circuit includes leakage current access lines AI_5 and VREF_COM connected to the leakage current detection current transformer. A ferrite bead FB6 is mounted on the leakage current access line AI_5. A clamping diode D5 and a resistor R1 are connected in parallel between AI_5 and VREF_COM after the ferrite bead FB6. A resistor R19 and a capacitor C27 for RC filtering are connected in parallel between the leakage current access line AI_5 and the ground terminal GND. Then, the leakage current is passed through a... After processing by the first-stage operational amplifier IC3B and the second-stage operational amplifier IC3A, the Vref DC current signal required by the microcontroller of the display module is output through resistor R38 at the output terminal of the second-stage operational amplifier IC3A on the leakage current signal output line AD_AI5. At the connection terminal of resistor R1 on the leakage current input line AI_5, resistor R5 and clamping diode D6 are connected in sequence. One of the clamping diodes D6 is grounded, and the other is loaded with a positive voltage. A short-circuit / open-circuit detection line AD_IL is led out between resistor R5 and clamping diode D6 to determine whether the line connecting the leakage current transformer is short-circuited or open-circuit.

9. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 1, characterized in that, The temperature measurement module includes a fire monitoring temperature measurement circuit disposed between the fire circuit and the microcontroller of the display module. The fire monitoring temperature measurement circuit includes multiple temperature measurement channel signals AT_1 to AT_4 from the fire circuit, and a temperature measurement channel signal processing circuit for processing each of the temperature measurement channel signals. The temperature measurement channel signal processing circuit includes a multi-channel selection chip U1 and an operational amplifier IC1B. Each temperature measurement channel signal AT_1 to AT_4 is connected to each input interface of the multi-channel selection chip U1. The output interface X of the multi-channel selection chip U1 is connected to the non-inverting input of the operational amplifier IC1B through a resistor R28. A capacitor C19 is connected between the non-inverting input and the inverting input of the operational amplifier IC1B. The inverting input of the operational amplifier IC1B is connected to the output of the operational amplifier IC1B. The output signal X1 of the operational amplifier IC1B is connected to the microcontroller of the display module through a resistor R31.

10. A motor protection device supporting distributed electrical fire monitoring and detection according to claim 1, characterized in that, The energy storage module in the main module includes a super energy storage capacitor, which is connected to an emergency power supply circuit for line abnormalities via a communication connector J2. The emergency power supply circuit for line abnormalities includes ferrite beads L3 and L4 connected to the communication connector J2 and arranged in parallel. A capacitor C17 is located between ferrite beads L3 and L4, near the front of the communication connector J2. A Zener diode D1, a polarized capacitor C16, and a capacitor C15 are sequentially located behind ferrite beads L3 and L4. The output terminal of ferrite bead L3 outputs a 5V voltage for emergency power supply, and the output terminal of ferrite bead L4 is grounded. The communication connector J2 also leads out differential lines A and B. Differential lines A and B are grounded at their connection points with the communication connector J2 via crystal filters L2 and L1, respectively. Resistors R35 and R36 are respectively installed on differential lines A and B, and an ESD diode D10 is connected between the output terminals of differential lines A and B.

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