A motor circuit fault detection device

Abstract

The present invention discloses a motor loop fault detection device, which includes an output board, a fault detection device and a motor control loop; the fault detection device includes a micro-control module, a first detection circuit and a second detection circuit; the input end and the output end of the first detection circuit are electrically connected to the output board and the micro-control module respectively; the input end and the output end of the second detection circuit are electrically connected to the motor control loop and the micro-control module respectively. When the present invention works, it can detect in real time that the output board does not give a signal. At the same time, the device can give a simulation to the motor control loop according to the settings of workers to judge whether the motor control loop is faulty, can simply and quickly locate the cause of the fault, replace the damaged module in time, and save the power transformation emergency repair time.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor loop detection, and relates to a motor loop fault detection device. Background Art

[0002] The intelligent distribution network station terminal DTU can collect the operation data of the power grid in real time, analyze and judge various fault information, quickly identify and classify faults and actively alarm. It is applicable to power grid equipment such as switch stations, substations, transformer substations, distribution rooms, distribution cabinets, and box-type substations. It can detect line faults and has the functions of remote signaling, remote measurement, and remote control, realizing all the functions required for the real-time performance of distribution network automation. The intelligent distribution network station terminal DTU is of great significance to the reliable operation of the power grid.

[0003] However, with the operation of the equipment, the closing motor part inside the equipment sometimes fails. According to current data statistics, there are about five or six closing faults in an urban area. The main reasons for the faults are two: the signal is not sent in place, resulting in inaccurate closing of the relay; the relay knife switch is damaged. However, since the terminal DTU is provided by the manufacturer, it is very difficult for front-line technicians to accurately and timely judge the cause of the fault. For this reason, this product develops a closing motor loop fault detection device. Summary of the Invention

[0004] The present invention aims to provide a motor loop fault detection device, which can quickly locate faults through the first detection circuit and the second detection circuit.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A motor loop fault detection device includes an output board, a fault detection device, and a motor control loop;

[0007] The fault detection device includes a micro-control module, a first detection circuit, and a second detection circuit; the input end and the output end of the first detection circuit are electrically connected to the output board and the micro-control module respectively; the input end and the output end of the second detection circuit are electrically connected to the motor control loop and the micro-control module respectively.

[0008] Preferably, the output board is provided with a plurality of KC ports and COM ports. The first detection circuit includes a plurality of optocouplers. The KC ports are electrically connected to the cathodes of the optocouplers, and the anodes of the optocouplers are electrically connected to the micro-control module. The COM ports are grounded.

[0009] Preferably, the second detection circuit includes a plurality of relays. The two ends of the relays are electrically connected to the micro-control module and the motor control loop respectively.

[0010] Preferably, the first detection circuit further includes a series resistor and a parallel resistor. The two ends of the series resistor are respectively connected to the KC port and the optocoupler, one end of the parallel resistor is grounded, and the other end is connected to the optocoupler and the microcontrol module.

[0011] Preferably, in a motor circuit fault detection device, the microcontrol module includes a microcontrol unit and a display screen, and the microcontrol unit is electrically connected to the display screen.

[0012] Advantages of the present invention: When the present invention is working, it can detect in real time that the opening board does not give a signal. At the same time, according to the settings of workers, this device can give an analog signal to the motor control circuit to determine whether there is a fault in the motor control circuit, quickly and simply locate the cause of the fault, and replace the damaged module in time, saving the power repair time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic general structure diagram of the present invention.

[0014] Figure 2 It is a schematic circuit structure diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. It should be understood that the present application is not limited by the example embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0016] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0017] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0018] In the embodiments of the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The present invention provides an attached Figure 1 In an embodiment of the present invention, a motor loop fault detection device includes a trip panel, a fault detection device, and a motor control loop; the fault detection device includes a micro-control module, a first detection circuit, and a second detection circuit; the input end and the output end of the first detection circuit are electrically connected to the trip panel and the micro-control module respectively; the input end and the output end of the second detection circuit are electrically connected to the motor control loop and the micro-control module respectively. The first detection circuit is connected to the trip panel and the micro-control module to detect in real time whether the trip panel gives a signal, and the second detection circuit is connected to the motor control loop and the micro-control module to simulate the signal given by the trip panel to the motor control loop.

[0020] The trip panel is provided with a plurality of KC ports and COM ports; the first detection circuit includes a plurality of optocouplers; the KC ports are electrically connected to the cathodes of the optocouplers, and the anodes of the optocouplers are electrically connected to the micro-control module; the COM port is grounded. The first detection circuit further includes a series resistor and a parallel resistor; the two ends of the series resistor are respectively connected to the KC port and the optocoupler; one end of the parallel resistor is grounded, and the other end is connected to the optocoupler and the micro-control module. The COM port is grounded, and the trip panel is provided with a plurality of KC ports, wherein KC01 and KC02 are respectively connected to the series resistors R1 and R2 inside the first detection circuit, and R1 and R2 are respectively connected to the cathodes of the diodes inside the optocouplers T1 and T2. When KC01 and KC02 of the trip panel are closed, the internal diodes of T1 and T2 light up, and the levels of the parallel resistors R3 and R4 change from low to high. The micro-control module reads this level change to determine that the trip panel is closed at this time; when KC01 and KC02 of the trip panel are disconnected, the levels of R3 and R4 become low, and it is determined that the trip panel is disconnected at this time. The micro-control module judges the closing time of the trip panel according to the level change time of R3 and R4.

[0021] The second detection circuit includes several relays; both ends of the relays are electrically connected to the micro control module and the motor control circuit respectively. The motor control circuit is provided with several output terminals, and output terminal 1 and output terminal 2 are respectively connected to relay 1 and relay 2, output terminal 3 is grounded. The micro control module can achieve precise control reproduction through the relays according to the time parameters read by the trip panel; at the same time, the control mode of the relays can also be defined according to the user to locate the fault information.

[0022] The micro control module includes a micro control unit MCU and a display screen; the micro control unit MCU is electrically connected to the display screen. The display screen shows whether there is a closing operation and the closing time.

[0023] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0024] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motor circuit fault detection device, characterized in that: it includes an output board, a fault detection device and a motor control circuit; the fault detection device includes a micro-control module, a first detection circuit and a second detection circuit; the input end and the output end of the first detection circuit are electrically connected to the output board and the micro-control module respectively; the input end and the output end of the second detection circuit are electrically connected to the motor control circuit and the micro-control module respectively; the output board is provided with a plurality of KC ports and COM ports; the first detection circuit includes a plurality of optocouplers; the KC port is electrically connected to the cathode of the optocoupler, and the anode of the optocoupler is electrically connected to the micro-control module; the COM port is grounded; the second detection circuit includes a plurality of relays; both ends of the relay are electrically connected to the micro-control module and the motor control circuit respectively; the first detection circuit further includes a series resistor and a parallel resistor; both ends of the series resistor are connected to the KC port and the optocoupler respectively; one end of the parallel resistor is grounded, and the other end is connected to the optocoupler and the micro-control module.

2. The motor circuit fault detection device according to claim 1, characterized in that: the micro-control module includes a micro-control unit and a display screen; the micro-control unit is electrically connected to the display screen.

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