Combined transformer state monitoring circuit, PCB and device

Abstract

The utility model discloses a combined type transformer state monitoring circuit, a PCB and a device, the state monitoring circuit comprises a power supply unit, and a control unit and a detection unit which are respectively and electrically connected with the power supply unit, and the detection unit comprises an oil level detection part, an oil temperature detection part and an oil pressure detection part; the oil level detection part is used for realizing low oil level state detection, and the output end of the oil level detection part is connected with the input end of the control unit; the oil temperature detection part is used for realizing oil temperature detection, and the output end of the oil temperature detection part is connected with the input end of the control unit; the oil pressure detection part is used for realizing oil pressure detection, and the output end of the oil pressure detection part is connected with the input end of the control unit; according to the state monitoring circuit, the oil level, the oil temperature and the oil pressure in the working process of the combined transformer can be detected through the detection unit, the state monitoring circuit has the advantage of being comprehensive in detection, abnormal information can be fed back in time, the abnormal operation problem can be processed in time, and the stability and the safety degree of the combined transformer during working are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer state monitoring, in particular to a combined transformer state monitoring circuit, a PCB board and a device. Background Art

[0002] Combined transformer, also known as American box transformer, is a complete set of power distribution equipment that integrates transformer, load switch and protection device of high-voltage power receiving part, low-voltage distribution device, low-voltage metering system and reactive power compensation device. At present, temperature controller is often used to monitor the working temperature of combined transformer, which can effectively prevent accidents caused by excessive temperature rise of transformer. Temperature controller can monitor the working temperature of combined transformer and control the working state of combined transformer according to the preset threshold value to ensure operation within the safe range. When the transformer temperature exceeds the preset safety threshold, the temperature controller will trigger the corresponding alarm or take automatic control measures, such as shutting down the power supply or adjusting the operating state of the fan to prevent overheating and protect the equipment from damage.

[0003] However, during the operation of the combined transformer, changes in oil level and oil pressure will also affect the normal operation of the combined transformer, and cause the performance of the combined transformer to deteriorate, and even cause serious consequences such as fire. Therefore, it is necessary to monitor the oil temperature and oil pressure during the operation of the combined transformer. That is, the existing combined transformer has the problem of incomplete monitoring during operation.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a combined transformer state monitoring circuit, which can realize oil temperature detection, oil pressure detection and oil level detection during the operation of the combined transformer, and has the advantage of comprehensive detection.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A combined transformer state monitoring circuit comprises a power supply unit and a control unit and a detection unit electrically connected to the power supply unit respectively, wherein the detection unit comprises an oil level detection unit, an oil temperature detection unit and an oil pressure detection unit; the oil level detection unit is used to detect a low oil level state, and its output end is connected to the input end of the control unit; the oil temperature detection unit is used to detect oil temperature, and its output end is connected to the input end of the control unit; the oil pressure detection unit is used to detect oil pressure, and its output end is connected to the input end of the control unit.

[0008] The combined transformer state monitoring circuit also includes an IO device unit; the IO device unit is used to obtain or adjust the working state of the device, the power supply end of the IO device unit is connected to the output end of the power supply unit, and the IO device unit is electrically connected to the control unit.

[0009] In the combined transformer state monitoring circuit, the IO device unit includes an input detection part and an output control part, the input end of the input detection part is used to obtain the working state of the device, and the output end of the input detection part is connected to the input end of the control unit; the output end of the output control part is used to output device adjustment instructions, and the input end of the output control part is connected to the output end of the control unit; the power supply end of the input detection part and the power supply end of the output control part are respectively connected to the output end of the power supply unit.

[0010] In the combined transformer state monitoring circuit, the input detection part includes multiple input detection groups with consistent structures, and the output ends of the multiple input detection groups are respectively connected to the input ends of the control unit; the output control part includes multiple output control groups with consistent structures, and the input ends of the multiple output control groups are respectively connected to the output ends of the control unit.

[0011] The combined transformer state monitoring circuit further includes a communication unit, which is used to realize 485 communication between the control unit and an external device, and the communication unit is electrically connected to the control unit.

[0012] In the combined transformer state monitoring circuit, the control unit includes a third control chip U3, and pins 4, 5 and 6 of the third control chip U3 are respectively connected to the output end of the power supply unit; pin 22 of the third control chip U3 is connected to the output end of the oil level detection unit, pins 15, 16 and 17 of the third control chip U3 are respectively connected to the output end of the oil temperature detection unit, and pins 23 and 24 of the third control chip U3 are respectively connected to the output end of the oil pressure detection unit.

[0013] In the combined transformer state monitoring circuit, the oil level detection part includes a second connector CON2, a 25th resistor R25 and a 20th capacitor C20, the second connector CON2 is used to connect the oil level sensor, the pin 1 of the second connector CON2 is respectively connected to one end of the 20th capacitor C20 and one end of the 25th resistor R25, the other end of the 25th resistor R25 is connected to the output end of the power supply unit, and the other end of the 20th capacitor C20 and the pin 2 of the second connector CON2 are respectively grounded.

[0014] In the combined transformer state monitoring circuit, the oil pressure detection part includes a fourth control chip U4, a twenty-fourth resistor R24 ​​and a twenty-sixth resistor R26, pin 2 of the fourth control chip U4 is used to receive an external feedback oil pressure detection signal, pin 4 of the fourth control chip U4 is respectively connected to pin 24 of the third control chip U3 and one end of the twenty-fourth resistor R24, pin 3 of the fourth control chip U4 is respectively connected to pin 23 of the third control chip U3 and one end of the twenty-sixth resistor R26, pin 6 of the fourth control chip U4, the other end of the twenty-fourth resistor R24 ​​and the other end of the twenty-sixth resistor R26 are respectively connected to the output end of the power supply unit.

[0015] The utility model also provides a PCB board accordingly, on which any of the above-mentioned combined transformer state monitoring circuits is printed.

[0016] The utility model also provides a combined transformer state monitoring device accordingly, and the combined transformer state monitoring device adopts any of the combined transformer state monitoring circuits described above to realize operation control.

[0017] Beneficial effects:

[0018] The utility model provides a combined transformer state monitoring circuit, comprising a detection unit, wherein the detection unit comprises an oil level detection part, an oil temperature detection part and an oil pressure detection part, that is, the detection unit can realize the oil level, oil temperature and oil pressure detection during the working process of the combined transformer, has the advantages of comprehensive detection, can timely feedback abnormal information, realize timely processing of abnormal operation problems, and improve the stability and safety of the combined transformer during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A circuit block diagram of a combined transformer state monitoring circuit provided by the utility model;

[0020] Figure 2 A circuit structure diagram of the power supply unit provided by the utility model;

[0021] Figure 3 A circuit diagram of a control unit provided by the utility model;

[0022] Figure 4 A circuit diagram of an IO device unit provided by the utility model;

[0023] Figure 5 A circuit diagram of the detection unit provided by the utility model;

[0024] Figure 6 This is a circuit structure diagram of the communication unit provided by the utility model.

[0025] Explanation of main component symbols: 1-power supply unit, 2-control unit, 3-detection unit, 31-oil level detection unit, 32-oil temperature detection unit, 33-oil pressure detection unit, 4-IO device unit, 41-input detection unit, 42-output control unit, 5-communication unit. DETAILED DESCRIPTION

[0026] The utility model provides a combined transformer state monitoring circuit, a PCB board and a device. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples.

[0027] In the description of the present invention, it should be understood that the terms "installation", "connection" and the like should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figures 1 to 6 The utility model provides a combined transformer state monitoring circuit, including a power supply unit 1 and a control unit 2 and a detection unit 3 electrically connected to the power supply unit 1 respectively, the detection unit 3 including an oil level detection unit 31, an oil temperature detection unit 32 and an oil pressure detection unit 33; the oil level detection unit 31 is used to realize low oil level state detection, and its output end is connected to the input end of the control unit 2; the oil temperature detection unit 32 is used to realize oil temperature detection, and its output end is connected to the input end of the control unit 2; the oil pressure detection unit 33 is used to realize oil pressure detection, and its output end is connected to the input end of the control unit 2.

[0029] The present application discloses a combined transformer state monitoring circuit, including a detection unit 3, wherein the detection unit 3 includes an oil level detection unit 31, an oil temperature detection unit 32 and an oil pressure detection unit 33, that is, the detection unit 3 can realize the oil level, oil temperature and oil pressure detection during the operation of the combined transformer, and has the advantages of comprehensive detection, can timely feedback abnormal information, realize timely processing of abnormal operation problems, and improve the stability and safety of the combined transformer during operation.

[0030] In this example, see Figure 2The power supply unit 1 includes a first control chip U1, a second control chip U2, a first diode D1, a third capacitor C3, a fourth capacitor C4, a first inductor L1, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7; the positive electrode of the first diode D1 is used to connect to an external power supply device, and the external power supply device can be a power supply device for providing a 12V or 24V DC voltage; the negative electrode of the first diode D1 is respectively connected to the positive electrode of the third capacitor C3, one end of the fourth capacitor C4 and the pin 1 of the first control chip U1, the pin 2 of the first control chip U1 is connected to one end of the first inductor L1, and the other end of the first inductor L1 is ... pin 2 of the first inductor L1 is connected to the positive electrode of the third capacitor C3, one end of the fourth capacitor C4 and the pin 1 of the first control chip U1 And pin 3 of the first control chip U1 is respectively connected to the positive electrode of the fifth capacitor C5, one end of the sixth capacitor C6, one end of the seventh capacitor C7 and pin 2 of the second control chip U2, pin 3 of the second control chip U2 is an output pin for outputting a 3.3V DC voltage; pin 2 of the first control chip U1 is an output pin for outputting a 5V DC voltage; the negative electrode of the third capacitor C3, the other end of the fourth capacitor C4, the negative electrode of the fifth capacitor C5, the other end of the sixth capacitor C6, the other end of the seventh capacitor C7, pins 5 to 8 of the first control chip U1 and pin 12 of the second control chip U2 are respectively grounded.

[0031] In this embodiment, the model of the first control chip U1 is LM7805, and the model of the second control chip U2 is LM1117.

[0032] For further information, see Figure 1 and Figure 4 The combined transformer state monitoring circuit also includes an IO device unit 4; the IO device unit 4 is used to obtain or adjust the working state of the device, the power supply end of the IO device unit 4 is connected to the output end of the power supply unit 1, and the IO device unit 4 is electrically connected to the control unit 2.

[0033] For further information, see Figure 1 As shown in Figure 4, the IO device unit 4 includes an input detection unit 41 and an output control unit 42. The input end of the input detection unit 41 is used to obtain the working status of the device, and the output end of the input detection unit 41 is connected to the input end of the control unit 2; the output end of the output control unit 42 is used to output device adjustment instructions, and the input end of the output control unit 42 is connected to the output end of the control unit 2; the power supply end of the input detection unit 41 and the power supply end of the output control unit 42 are respectively connected to the output end of the power supply unit 1.

[0034] For further information, see Figure 4The input detection unit 41 includes multiple input detection groups with consistent structures, and the output ends of the multiple input detection groups are respectively connected to the input ends of the control unit 2; the output control unit 42 includes multiple output control groups with consistent structures, and the input ends of the multiple output control groups are respectively connected to the output ends of the control unit 2.

[0035] In this example, see Figure 4 The input detection unit 41 includes 4 input detection groups, and the input detection group includes a sixteenth resistor R16, a first optocoupler O1 and a fifteenth resistor R15. One end of the sixteenth resistor R16 is used to obtain the working status of the device, and the other end of the sixteenth resistor R16 is connected to pin 2 of the first optocoupler O1. Pin 4 of the first optocoupler O1 is respectively connected to pin 38 of the third control chip U3 and one end of the fifteenth resistor R15. The other end of the fifteenth resistor R15 is connected to pin 3 of the second control chip U2.

[0036] In this example, see Figure 4 The output control unit 42 includes three output control groups, which include a first transistor Q1, a fourth resistor R4, a second resistor R2, a third diode D3 and a first gate switch JDQ1. The base of the first transistor Q1 is connected to the pin 21 of the third control chip U3, the collector of the first transistor Q1 is respectively connected to one end of the second resistor R2 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is respectively connected to the anode of the third diode D3 and the pin 2 of the first gate switch JDQ1, the other end of the second resistor R2 is respectively connected to the pin 2 of the first control chip U1, the cathode of the third diode D3 and the pin 1 of the first gate switch JDQ1, and the pins 3 and 4 of the first gate switch JDQ1 are respectively used to connect to external devices to adjust the working state of the device.

[0037] In this embodiment, the function of the input detection unit 41 is to detect the state of the input signal, such as detecting the triggering or change of a button, sensor or other external signal, for monitoring and responding to external events or controlling the input of the system; the function of the output control unit 42 is to control the state of the output signal, such as starting, stopping, adjusting or switching a device or component, and the device can be a switch, motor, light, fan, etc.

[0038] For further information, see Figure 1 and Figure 6 The combined transformer state monitoring circuit further includes a communication unit 5 , which is used to realize 485 communication between the control unit 2 and an external device, and the communication unit 5 is electrically connected to the control unit 2 .

[0039] In this embodiment, the communication unit 5 includes a sixth control chip U6, a seventh control chip U7, a thirtieth resistor R30, a thirty-second resistor R32, a thirty-third resistor R33, a twenty-fifth capacitor C25, a twenty-eighth capacitor C28, a first voltage regulator TVS1, a second voltage regulator TVS2, a third voltage regulator TVS3, a first fuse F1 and a second fuse F2; pins 4 and 5 of the sixth control chip U6 are respectively connected to pins 45 and 46 of the third control chip U3, pins 12, 13 and 14 of the sixth control chip U6 are respectively connected to pins 1, 4 and 2 of the seventh control chip U7, and pins 6 of the seventh control chip U7 are respectively connected to the other end of the thirtieth resistor R30, one end of the thirty-second resistor R32, and the twenty-fifth capacitor C The first and second control chips U7 are connected to one end of the first voltage regulator tube TVS1, the negative electrode of the second voltage regulator tube TVS2 and one end of the first fuse F1, the pin 7 of the seventh control chip U7 is respectively connected to the other end of the thirty-second resistor R32, one end of the thirty-third resistor R33, the other end of the twenty-eighth capacitor C28, the negative electrode of the third voltage regulator tube TVS3, the positive electrode of the second voltage regulator tube TVS2 and one end of the second fuse F2, the other end of the twenty-fifth capacitor C25 is connected to one end of the twenty-eighth capacitor C28, the positive electrode of the first voltage regulator tube TVS1 is connected to the positive electrode of the third voltage regulator tube TVS3; the other end of the first fuse F1 and the other end of the second fuse F2 are respectively used to connect to an external device to realize a 485 communication connection with the external device.

[0040] In this embodiment, the model of the sixth control chip U6 is MAX1480, and the model of the seventh control chip U7 is MAX485.

[0041] In this embodiment, by providing the communication unit 5, abnormal problems can be promptly reported to operation and maintenance personnel or related personnel, so as to achieve timely resolution of abnormal problems, improve operation and maintenance efficiency, and reduce operation and maintenance costs.

[0042] For further information, see Figures 1 to 6 The control unit 2 includes a third control chip U3, and pins 4, 5 and 6 of the third control chip U3 are respectively connected to the output end of the power supply unit 1; pin 22 of the third control chip U3 is connected to the output end of the oil level detection unit 31, pins 15, 16 and 17 of the third control chip U3 are respectively connected to the output end of the oil temperature detection unit 32, and pins 23 and 24 of the third control chip U3 are respectively connected to the output end of the oil pressure detection unit 33.

[0043] In this embodiment, the third control chip U3 is an MCU controller; pins 4, 5 and 6 of the third control chip U3 are respectively connected to pin 3 of the second control chip U2, pins 45 and 46 of the third control chip U3 are respectively connected to the communication unit 5, pins 19 to 21 of the third control chip U3 are respectively connected to the input ends of multiple output control groups, and pins 38 to 41 of the third control chip U3 are respectively connected to the output ends of multiple input detection groups.

[0044] For further information, see Figure 2 , Figure 3 and Figure 5 The oil level detection unit 31 includes a second connector CON2, a 25th resistor R25 and a 20th capacitor C20. The second connector CON2 is used to connect the oil level sensor. Pin 1 of the second connector CON2 is respectively connected to one end of the 20th capacitor C20 and one end of the 25th resistor R25. The other end of the 25th resistor R25 is connected to the output end of the power supply unit 1. The other end of the 20th capacitor C20 and pin 2 of the second connector CON2 are respectively grounded.

[0045] For further information, see Figure 2 , Figure 3 and Figure 5 The oil pressure detection unit 33 includes a fourth control chip U4, a twenty-fourth resistor R24 ​​and a twenty-sixth resistor R26, a pin 2 of the fourth control chip U4 is used to receive an external feedback oil pressure detection signal, a pin 4 of the fourth control chip U4 is respectively connected to a pin 24 of the third control chip U3 and one end of the twenty-fourth resistor R24, a pin 3 of the fourth control chip U4 is respectively connected to a pin 23 of the third control chip U3 and one end of the twenty-sixth resistor R26, a pin 6 of the fourth control chip U4, the other end of the twenty-fourth resistor R24 ​​and the other end of the twenty-sixth resistor R26 are respectively connected to the output end of the power supply unit 1; in this embodiment, the model of the fourth control chip U4 can be ATmega328.

[0046] For further information, see Figure 2 , Figure 3 and Figure 5The oil temperature detection unit 3 includes a third plug-in component CON3 and a fifth control chip U5. The third plug-in component CON3 is used to connect a temperature sensor. Pin 1 and pin 2 of the third plug-in component CON3 are respectively connected to pin 1 and pin 3 of the fifth control chip U5. Pins 5 to 7 of the fifth control chip U5 are respectively connected to pin 16, pin 15 and pin 17 of the third control chip U3; pin 4 of the fifth control chip U5 is connected to pin 3 of the second control chip U2; in this embodiment, the model of the fifth control chip U5 can be MAX31850.

[0047] The utility model also provides a PCB board accordingly, on which any of the above-mentioned combined transformer state monitoring circuits is printed.

[0048] The utility model also provides a combined transformer state monitoring device accordingly, and the combined transformer state monitoring device adopts any of the combined transformer state monitoring circuits described above to realize operation control.

[0049] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A combined transformer state monitoring circuit, characterized in that: It includes a power supply unit and a control unit and a detection unit electrically connected to the power supply unit respectively, the detection unit includes an oil level detection unit, an oil temperature detection unit and an oil pressure detection unit; the oil level detection unit is used to realize low oil level state detection, and its output end is connected to the input end of the control unit; the oil temperature detection unit is used to realize oil temperature detection, and its output end is connected to the input end of the control unit; the oil pressure detection unit is used to realize oil pressure detection, and its output end is connected to the input end of the control unit.

2. A combined transformer state monitoring circuit according to claim 1, characterized in that: It also includes an IO device unit; the IO device unit is used to obtain or adjust the working status of the device, the power supply end of the IO device unit is connected to the output end of the power supply unit, and the IO device unit is electrically connected to the control unit.

3. A combined transformer state monitoring circuit according to claim 2, characterized in that: The IO device unit includes an input detection unit and an output control unit. The input end of the input detection unit is used to obtain the working status of the device, and the output end of the input detection unit is connected to the input end of the control unit; the output end of the output control unit is used to output device adjustment instructions, and the input end of the output control unit is connected to the output end of the control unit; the power supply end of the input detection unit and the power supply end of the output control unit are respectively connected to the output end of the power supply unit.

4. A combined transformer state monitoring circuit according to claim 3, characterized in that: The input detection unit includes multiple input detection groups with consistent structures, and the output ends of the multiple input detection groups are respectively connected to the input ends of the control unit; the output control unit includes multiple output control groups with consistent structures, and the input ends of the multiple output control groups are respectively connected to the output ends of the control unit.

5. A combined transformer state monitoring circuit according to claim 1, characterized in that: It also includes a communication unit, which is used to realize 485 communication between the control unit and an external device, and the communication unit is electrically connected to the control unit.

6. A combined transformer state monitoring circuit according to claim 1, characterized in that: The control unit includes a third control chip U3, and pins 4, 5 and 6 of the third control chip U3 are respectively connected to the output end of the power supply unit; pin 22 of the third control chip U3 is connected to the output end of the oil level detection unit, pins 15, 16 and 17 of the third control chip U3 are respectively connected to the output end of the oil temperature detection unit, and pins 23 and 24 of the third control chip U3 are respectively connected to the output end of the oil pressure detection unit.

7. A combined transformer state monitoring circuit according to claim 6, characterized in that: The oil level detection part includes a second connector CON2, a 25th resistor R25 and a 20th capacitor C20. The second connector CON2 is used to connect the oil level sensor. Pin 1 of the second connector CON2 is respectively connected to one end of the 20th capacitor C20 and one end of the 25th resistor R25. The other end of the 25th resistor R25 is connected to the output end of the power supply unit. The other end of the 20th capacitor C20 and pin 2 of the second connector CON2 are respectively grounded.

8. A combined transformer state monitoring circuit according to claim 6, characterized in that: The oil pressure detection unit includes a fourth control chip U4, a twenty-fourth resistor R24 ​​and a twenty-sixth resistor R26, pin 2 of the fourth control chip U4 is used to receive an external feedback oil pressure detection signal, pin 4 of the fourth control chip U4 is respectively connected to pin 24 of the third control chip U3 and one end of the twenty-fourth resistor R24, pin 3 of the fourth control chip U4 is respectively connected to pin 23 of the third control chip U3 and one end of the twenty-sixth resistor R26, pin 6 of the fourth control chip U4, the other end of the twenty-fourth resistor R24 ​​and the other end of the twenty-sixth resistor R26 are respectively connected to the output end of the power supply unit.

9. A PCB board, characterized in that: The PCB board is printed with the combined transformer state monitoring circuit as described in any one of claims 1 to 8.

10. A combined transformer status monitoring device, characterized in that: The combined transformer state monitoring device adopts the combined transformer state monitoring circuit as described in any one of claims 1 to 8 to realize operation control.

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