Motor diagnosis and protection device

Abstract

The utility model discloses a motor diagnosis and protection device. The motor diagnosis and protection device comprises a shell, a transition plate is arranged in the shell, a power module, a motor protection module, an online monitoring module and a signal processing module are arranged on the transition plate, the power module is electrically connected with the motor protection module, the online monitoring module and the signal processing module, and the signal processing module is electrically connected with the motor protection module. The motor protection module and the online monitoring module are electrically connected with the signal processing module; the signal processing module is also electrically connected with a zero sequence current transformer and a current and voltage transformer. A motor protection device and an on-line monitoring device can be integrated into one shell as modules, and the two modules share one input interface to receive signals of a mutual inductor, so that the occupied space of the device is effectively reduced, and the utilization rate of the interface is improved. The technical problems that the occupied space of the device is too large, and the interface utilization efficiency is low are solved.

Description

Technical Field

[0001] The present application relates to the field of low-voltage motor relay protection, and in particular, to a motor diagnosis and protection device. Background Art

[0002] The low-voltage motor microcomputer integrated protection monitoring device, referred to as the comprehensive protection device, is used to monitor and protect low-voltage motors. It can protect against various situations such as thermal overload, phase failure, imbalance, underload, grounding / leakage, stall, overvoltage external fault, etc. that occur during the operation of the motor. It also has SOE fault event recording and voltage and current waveform recording functions, as well as remote automatic control, on-site direct control, panel indication, signal alarm, field bus communication and other functions.

[0003] The comprehensive protection device is installed in the low-voltage switch cabinet or drawer cabinet. The relay protection device only protects the motor when the motor has abnormal operation or electrical fault, and issues an alarm or trip command. At this time, the motor damage and the resulting abnormal shutdown losses have already occurred and are irreversible. In particular, in the petrochemical field where motors operate at high flux, full load, and continuously, sudden unplanned shutdown of motors will cause production equipment to stop at the least, and may also cause environmental pollution, equipment damage, and personnel injury at the worst. Therefore, the faults and defects of the motor need to be discovered and handled as early as possible, which can not only avoid endangering the safe and stable operation of production, but also provide early warning of the early failure of the motor, which is of great benefit to maintaining the health of the motor operation and reducing failure losses.

[0004] In the prior art, two devices, a motor protection device and a fault diagnosis and monitoring device, are used to perform motor protection and fault diagnosis and monitoring respectively. Each device is provided with an independent housing and needs to be configured with a corresponding input interface to receive the signal of the transformer, resulting in the device occupying too much space and low utilization efficiency of the interface.

[0005] Currently, no effective solution has been proposed to solve the problems in the related art that the space occupied by the device is too large and the utilization efficiency of the interface is low. Summary of the invention

[0006] The main purpose of the present application is to provide a motor diagnosis and protection device to solve the problem that the device occupies too much space and has low utilization efficiency of the interface.

[0007] In order to achieve the above objective, according to one aspect of the present application, a motor diagnosis and protection device is provided.

[0008] The motor diagnosis and protection device according to the present application includes: a shell, a transition plate is arranged in the shell, and a power supply module, a motor protection module, an online monitoring module and a signal processing module are arranged on the transition plate, wherein the power supply module is electrically connected to the motor protection module, the online monitoring module and the signal processing module, and the motor protection module and the online monitoring module are electrically connected to the signal processing module; the signal processing module is also electrically connected to a zero-sequence current transformer and a current and voltage transformer.

[0009] Furthermore, the signal processing module includes: a signal input interface electrically connected to the zero-sequence current transformer and the current and voltage transformer, a protection signal circuit and a measurement signal circuit electrically connected to the signal input interface, the protection signal circuit electrically connected to the motor protection module, and the measurement signal circuit electrically connected to the online monitoring module.

[0010] Furthermore, the motor protection module includes: a first controller, and a first functional module and a first external hardware electrically connected to the first controller.

[0011] Furthermore, the first functional module includes: a 485 communication interface, a switch input interface, a switch output interface and a transmitter output interface.

[0012] Furthermore, the first controller is a single chip microcomputer of the GD32F305 model.

[0013] Furthermore, the online monitoring module includes: a second controller, and a second functional module connected to the second controller, a second external hardware, and an AD conversion chip; the AD conversion chip is electrically connected to the measurement signal circuit.

[0014] Furthermore, the second functional module includes: a 485 communication interface, an Ethernet interface and a USB interface.

[0015] Furthermore, the second controller is a single chip microcomputer of the GD32F470 model.

[0016] Furthermore, the motor protection module and the online monitoring module are also electrically connected to a display, and the display connection port is arranged on the transition plate.

[0017] Furthermore, the motor protection module includes: a first controller, and a first functional module and a first external hardware electrically connected to the first controller; the online monitoring module includes: a second controller, and a second functional module, a second external hardware and an AD conversion chip connected to the second controller; the AD conversion chip is electrically connected to the measurement signal circuit; the first controller is communicatively connected to the second controller via a UART interface.

[0018] In an embodiment of the present application, an integrated motor monitoring and protection method is adopted, through a shell, a transition plate is provided in the shell, and a power supply module, a motor protection module, an online monitoring module and a signal processing module are provided on the transition plate, wherein the power supply module is electrically connected to the motor protection module, the online monitoring module and the signal processing module, and the motor protection module and the online monitoring module are electrically connected to the signal processing module; the signal processing module is also electrically connected to a zero-sequence current transformer and a current and voltage transformer; the purpose of integrating the two devices of motor protection and online monitoring as two modules into one shell, and the two modules share an input interface to receive the signal of the transformer, thereby achieving the technical effect of effectively reducing the occupied space of the device and improving the utilization rate of the interface, thereby solving the technical problem that the space occupied by the device is too large and the utilization efficiency of the interface is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0020] Figure 1 is a schematic diagram of electrical connections of a motor diagnosis and protection device according to an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of electrical connections of a motor diagnosis and protection device according to a preferred embodiment of the present application;

[0022] Figure 3 It is a structural schematic diagram of a motor diagnosis and protection device according to another preferred embodiment of the present application.

[0023] Reference numerals

[0024] 10. Transition board; 20. Power supply module; 30. Motor protection module; 40. Online monitoring module; 50. Signal processing module; 60. Zero-sequence current transformer; 70. Current and voltage transformer; 80. Display; 90. Wiring terminal; 301. First controller; 302. First functional module; 303. First external hardware; 401. Second controller; 402. Second functional module; 403. Second external hardware; 404. AD conversion chip; 501. Signal input interface; 502. Protection signal circuit; 503. Measurement signal circuit. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0029] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] like Figure 1 and Figure 3 As shown, the present application relates to a motor diagnosis and protection device, which includes: a shell, a transition plate 10 is provided in the shell, and a power supply module 20, a motor protection module 30, an online monitoring module 40 and a signal processing module 50 are provided on the transition plate 10, wherein the power supply module 20 is electrically connected to the motor protection module 30, the online monitoring module 40 and the signal processing module 50, and the motor protection module 30, the online monitoring module 40 and the signal processing module 50 are electrically connected; the signal processing module 50 is also electrically connected to a zero-sequence current transformer 60 and a current and voltage transformer 70.

[0032] Specifically, the shell has the function of fixing and protecting the transition plate 10; in this embodiment, preferably, the shell is embedded in the drawer cabinet panel for easy installation.

[0033] The transition board 10 has the function of setting related components. In the present embodiment, a connector is set near the edge of the transition board 10 to cooperate with other boards to fix the transition board 10. Furthermore, a connector is used on the transition board 10 to achieve electrical connection between related components.

[0034] The power module 20 has the function of supplying power to various components.

[0035] The motor protection module 30 has the function of monitoring and protecting the motor; it should be understood that in this embodiment, the corresponding motor protection program is pre-burned in the motor protection module 30, so that when a mutual inductor signal enters, the motor protection can be performed based on this program.

[0036] The online monitoring module 40 has the function of online monitoring and fault diagnosis of the motor; it should be understood that in this embodiment, the corresponding fault diagnosis program is pre-burned in the online monitoring module 40, so that when a mutual inductor signal enters, fault diagnosis can be performed based on this program.

[0037] The signal processing module 50 has the function of receiving and processing the transformer signal. In this embodiment, the processed transformer signal is respectively given to the motor protection module 30 and the online monitoring module 40.

[0038] The zero-sequence current transformer 60 and the current-voltage transformer 70 have the function of collecting motor electrical parameter signals; in this embodiment, the zero-sequence current transformer 60 and the current-voltage transformer 70 can realize the motor electrical parameter collection and signal processing functions by being electrically connected to the signal processing module 50 of the present application.

[0039] The working principle of the device is as follows: when the motor is monitored using the motor diagnosis and protection device, the transformer signal is first detected by the zero-sequence current transformer 60 and the current and voltage transformer 70, and then the signal is received and processed by the signal processing module 50 and given to the motor protection module 30 and the online monitoring module 40 for motor protection processing and fault diagnosis respectively. The processing and diagnosis results are fed back to the human-computer interaction device through the module's own interface.

[0040] From the above description, it can be seen that the present application can integrate the motor protection and online monitoring devices into one housing as two modules, and the two modules share an input interface to receive the signal of the transformer, thereby effectively reducing the occupied space of the device and improving the utilization rate of the interface, thereby solving the technical problems of excessive space occupied by the device and low utilization efficiency of the interface. In addition, since the motor protection module 30 and the online monitoring module 40 are independent of each other, the protection function and the diagnostic function can still operate independently without affecting each other.

[0041] Preferably, if Figure 2 As shown, the signal processing module 50 includes: a signal input interface 501 electrically connected to the zero-sequence current transformer 60 and the current and voltage transformer 70, a protection signal circuit 502 and a measurement signal circuit 503 electrically connected to the signal input interface 501, the protection signal circuit 502 is electrically connected to the motor protection module 30, and the measurement signal circuit 503 is electrically connected to the online monitoring module 40; two sets of signal processing circuits, the protection signal circuit 502 and the measurement signal circuit 503, are used to process the transformer signals respectively, and obtain the protection signal processing results and the measurement signal processing results, so that they can be respectively applicable to the motor protection module 30 and the online monitoring module 40.

[0042] Preferably, if Figure 2As shown, the motor protection module 30 includes: a first controller 301, and a first functional module 302 and a first external hardware 303 electrically connected to the first controller 301; further, the first functional module 302 includes: a 485 communication interface, an input switch, an output switch and an output transmitter; those skilled in the art should understand that the first controller 301 is a single-chip microcomputer of the GD32F305 model. The corresponding functions are realized by the functional modules such as the 485 communication interface, the input switch, the output switch and the output transmitter, and the processed motor protection data is stored and a real-time clock is generated by the external hardware such as the E2PROM, the RTC and the crystal oscillator. It should be understood that the first controller 301 has built-in internal RAM, internal FLASH, UATA / 12C, ADC, PWM, GPIO, protection control and communication services.

[0043] Preferably, if Figure 2 As shown, the online monitoring module 40 includes: a second controller 401, and a second functional module 402 connected to the second controller 401, a second external hardware 403, and an AD conversion chip 404; the AD conversion chip 404 is electrically connected to the measurement signal circuit 503; further, the second functional module 402 includes: a 485 communication interface, an Ethernet interface, and a USB interface; those skilled in the art should understand that the second controller 401 is a single-chip microcomputer of the GD32F470 model. The corresponding functions are realized by the functional modules such as the 485 communication interface, the Ethernet interface, and the USB interface, and the processed motor diagnostic data is stored and a real-time clock is generated by the external hardware such as SDRAM, FLASH, RTC, and crystal oscillator. It should be understood that the second controller 401 has built-in internal RAM, internal FLASH, UATA, I2C / SPI, FPU, fault diagnosis, and signal processing.

[0044] It is important to understand that Figure 3As shown, the 485 communication interface, Ethernet interface and USB interface in this embodiment can be arranged in the middle position of the transition board 10, which is conducive to mass production. It should also be understood that the transition board 10 can be a circuit board, and the relevant components are arranged on the circuit board, and the electrical connection between the components is carried out by a connector. The transition board 10 can also be a wiring board composed of an interface board, a display board, a motor protection board, and a power board. The interface board is arranged with IO interfaces such as a 485 communication interface, an Ethernet interface and a USB interface, and a terminal 90 is set at the end; the display board is arranged with a display 80, and a terminal 90 is set at the end; the transition board 10 is arranged with a motor protection module 30, an online monitoring module 40 and a signal processing module 50, and a terminal 90 is set at the end; the power module 20 and the relay are arranged on the power board, and a terminal 90 is set at the end; the electrical connection between the components is also realized by routing the wires between the terminal 90.

[0045] Preferably, if Figure 2 As shown, the motor protection module 30 and the online monitoring module 40 are also electrically connected to a display 80, and the connection port of the display 80 is arranged on the transition plate 10; the display 80 is arranged on the transition plate 10 with an integrated structure, further reducing the occupied space, and at the same time, simple human-computer interaction can be achieved through the display 80.

[0046] Preferably, if Figure 2 As shown, the motor protection module 30 includes: a first controller 301, and a first functional module 302 and a first external hardware 303 electrically connected to the first controller 301; the online monitoring module 40 includes: a second controller 401, and a second functional module 402, a second external hardware 403 and an AD conversion chip 404 connected to the second controller 401; the AD conversion chip 404 is electrically connected to the measurement signal circuit 503; the first controller 301 is connected to the second controller 401 through a UART interface. The two controllers communicate with each other using a UART interface. Only one USB interface is needed, that is, the running constants, SOE reports and fault recording data of the motor protection module 30 and the online monitoring module 40 can be copied to a U disk, so as to facilitate the analysis of big data, improve the diagnostic algorithm and logic, and improve the accuracy of fault diagnosis. The two modules share a USB interface, which improves the convenience of data transfer and further improves the utilization rate of the interface. Furthermore, the USB interface can also be used for program burning simulation and data backup of the motor protection module 30 and the online monitoring module 40, and the USB data signal is switched through a 4-input 1-output switching circuit.

[0047] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motor diagnosis and protection device, characterized in that: include: A shell, wherein a transition plate (10) is arranged in the shell, and a power module (20), a motor protection module (30), an online monitoring module (40) and a signal processing module (50) are arranged on the transition plate (10), wherein the power module (20) is electrically connected to the motor protection module (30), the online monitoring module (40) and the signal processing module (50), and the motor protection module (30), the online monitoring module (40) and the signal processing module (50) are electrically connected; and the signal processing module (50) is also electrically connected to a zero-sequence current transformer (60) and a current and voltage transformer (70).

2. The motor diagnosis and protection device according to claim 1, characterized in that: The signal processing module (50) comprises: a signal input interface (501) electrically connected to a zero-sequence current transformer (60) and a current and voltage transformer (70), a protection signal circuit (502) and a measurement signal circuit (503) electrically connected to the signal input interface (501), the protection signal circuit (502) being electrically connected to a motor protection module (30), and the measurement signal circuit (503) being electrically connected to an online monitoring module (40).

3. The motor diagnosis and protection device according to claim 1, characterized in that: The motor protection module (30) comprises: a first controller (301), a first functional module (302) electrically connected to the first controller (301), and first external hardware (303).

4. The motor diagnosis and protection device according to claim 3, characterized in that: The first functional module (302) includes: a 485 communication interface, an input switch, an output switch and an output transmitter.

5. The motor diagnosis and protection device according to claim 3, characterized in that: The first controller (301) is a single chip microcomputer of the GD32F305 model.

6. The motor diagnosis and protection device according to claim 2, characterized in that: The online monitoring module (40) comprises: a second controller (401), and a second functional module (402) connected to the second controller (401), a second external hardware (403), and an AD conversion chip (404); the AD conversion chip (404) is electrically connected to a measurement signal circuit (503).

7. The motor diagnosis and protection device according to claim 6, characterized in that: The second functional module (402) includes: a 485 communication interface, an Ethernet interface and a USB interface.

8. The motor diagnosis and protection device according to claim 6, characterized in that: The second controller (401) is a single chip microcomputer of the GD32F470 model.

9. The motor diagnosis and protection device according to claim 1, characterized in that: The motor protection module (30) and the online monitoring module (40) are also electrically connected to a display (80), and a connection port of the display (80) is arranged on the transition plate (10).

10. The motor diagnosis and protection device according to claim 1, characterized in that: The motor protection module (30) comprises: a first controller (301), and a first functional module (302) electrically connected to the first controller (301), and a first external hardware (303); the online monitoring module (40) comprises: a second controller (401), and a second functional module (402) connected to the second controller (401), a second external hardware (403), and an AD conversion chip (404); the AD conversion chip (404) is electrically connected to a measurement signal circuit (503); and the first controller (301) is communicatively connected to the second controller (401) via a UART interface.

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