CN221305748U - Frequency converter capable of maintaining master control system board card on line - Google Patents
Frequency converter capable of maintaining master control system board card on line Download PDFInfo
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- CN221305748U CN221305748U CN202421289603.3U CN202421289603U CN221305748U CN 221305748 U CN221305748 U CN 221305748U CN 202421289603 U CN202421289603 U CN 202421289603U CN 221305748 U CN221305748 U CN 221305748U
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- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000012423 maintenance Methods 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 description 7
- 241000023813 Isia Species 0.000 description 4
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- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to a frequency converter capable of maintaining a master control system board card on line, which comprises an input power supply module, a power output module and the master control system board card which are sequentially connected in a circuit mode, wherein the master control system board card is provided with a plurality of sleeves with the same structure, the input power supply module is connected with an external frequency converter power supply grid, the input end of the power output module is connected with the input power supply module, the output end of the power output module is used as an external output end of the frequency converter and is connected with an external electric motor, the power output module is also connected with the plurality of sleeves of master control system board cards, the power output module is controlled by a single set of master control system board card to be driven to output, and the plurality of sleeves of master control system board cards are all connected through communication signal wires. According to the utility model, the on-line replacement sampling bypass device is added, so that one set of main control system board card can be replaced on line under the condition of no shutdown, and the running reliability of the frequency converter is further improved.
Description
Technical Field
The utility model belongs to the technical field of frequency converters, and particularly relates to a frequency converter capable of maintaining a main control system board card on line.
Background
With the development of variable frequency speed regulation technology, the frequency converter is widely applied, the frequency converter can realize stepless speed regulation, the requirement on motor speed regulation control in the production process is met, and meanwhile, the energy can be greatly saved, the product yield is improved, and the production cost is reduced.
In large-scale production of operation of a driving motor of a frequency converter, some production processes are required to be operated continuously, equipment operation is not allowed to be stopped halfway, and if any one of the equipment in the process flow is failed, huge economic loss is caused, and even safety accidents can occur. Therefore, the frequency converter is required to have very high reliability, and the average time to failure is required to be more than tens of thousands of hours. Because of the numerous components of the frequency converter, the system is complex, and is a link with weaker system reliability.
In order to improve the reliability of frequency conversion, the control system of the frequency converter can adopt a redundant control mechanism, any set of control system faults do not affect the continuous operation of the frequency converter, but in the operation process of the frequency converter, input and output sampling lines corresponding to the main control system board are connected with a power grid or a motor, potential safety hazards exist in the process of manually maintaining or replacing the main control system board, if the main control system board with faults cannot be maintained or replaced, the frequency converter continuously operates for a long time, the situation that the faults of a certain main control system board cannot be repaired in time and the faults of other main control system boards occur again exists, and once the situation occurs, the frequency converter is stopped due to the faults.
Based on this, there is a need for a frequency converter with an on-line maintenance function for a main control system board card without stopping the machine, so as to improve the reliability of the frequency conversion driving system.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art, and provides a frequency converter capable of maintaining a main control system board card on line, which can replace the main control system board card of the frequency converter under the condition of no shutdown and reduce the risk of failure shutdown of the frequency converter.
The utility model is realized in the following way: the utility model provides a but on-line maintenance master control system integrated circuit board's converter which characterized in that: the power output module is also connected with a plurality of master control system boards simultaneously, the power output module is driven to output by single master control system boards in a control mode, and a plurality of sets of master control system boards are all connected through communication signal lines.
Each set of main control system board card comprises an input circuit of an independent control system power supply, a switch is arranged on a connecting line between the main control system board card and the control system power supply, and a sampling signal line is arranged between the main control system board card and the frequency converter.
The sampling signal line comprises an input voltage sampling signal line and an input current sampling signal line which are arranged between the main control system board card and the input end of the frequency converter, and one or more of an output voltage sampling signal line and an output current sampling signal line which are arranged between the main control system board card and the output end of the frequency converter.
The main control system board is provided with corresponding on-line replacement sampling bypass devices on the sampling signal lines respectively, the on-line replacement sampling bypass devices are provided with selection switches, when the main control system board operates normally, the selection switches of the on-line replacement sampling bypass devices are arranged on one side of an output end of a loop formed by the sampling signal lines and the main control system board, when the main control system board needs to be maintained, the selection switches of the on-line replacement sampling bypass devices are arranged on one side of a grounding end, and connection between the corresponding sampling signal lines and the main control system board is in a disconnected state.
The frequency converter adopts two sets or more than two sets of main control system boards, and communication signal wires for connection between the main control system boards selectively adopt optical fibers, network cables or communication buses according to the number of the main control system boards.
Based on the technical scheme, the utility model has the following beneficial effects:
The utility model designs the frequency converter with the redundant control system by configuring at least two sets of main control system boards with the same structure, and can timely perform online replacement or maintenance when any main control system board fails in the operation process of the frequency converter by online replacement of the sampling bypass device, thereby ensuring that the frequency converter continuously works without stopping the frequency converter, effectively reducing the probability of stopping the frequency converter due to the failure, and improving the operation reliability of the frequency converter.
Drawings
Fig. 1 is a schematic diagram of a module architecture according to the present utility model.
Fig. 2 is a schematic diagram of the circuit connection relationship of the present utility model.
FIG. 3 is a schematic circuit diagram of an on-line replacement sampling bypass device.
In the figure: 1. the frequency converter supplies power to the power grid; 2. A control system power supply; 3. A frequency converter; 4. A first main control system board card; 5. A second main control system board card; 6. An input voltage sampling signal line; 7. Replacing the sampling bypass device on line; 8. An input current sampling signal line; 9. An output voltage sampling signal line; 10. An output current sampling signal line; 11. A motor; 12. A communication signal line;
71. the input voltage on-line replacement sampling bypass device ISVA; 72. The input current on-line replacement sampling bypass device ISIA; 73. The input voltage on-line replacement sampling bypass device ISVB; 74. The input current on-line changes the sampling bypass device ISIB;
75. The output voltage on-line replacement sampling bypass device OSVA; 76. The output current on-line replacement sampling bypass device OSIA; 77. The output voltage on-line replacement sampling bypass device OSVB; 78. The output current on-line changes the sampling bypass device OSIB.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further clearly and completely described below with reference to specific embodiments of the present utility model and the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and the following embodiments and features of the embodiments may be combined with each other without conflict.
Examples:
According to the attached drawings 1, 2 and 3, the utility model discloses a frequency converter capable of maintaining a main control system board card on line, which comprises an input power supply module, a power output module and the main control system board card which are sequentially connected in a circuit manner. The main control system board card in this embodiment is provided with two sets of boards with the same structure, namely a first main control system board card 4 and a second main control system board card 5.
The input power supply module is connected with an external frequency converter power supply grid 1, the input end of the power output module is connected with the input power supply module, and the output end of the power output module is used as the external output end of the frequency converter 3 to be connected with an external electricity motor 11.
The power output module is also connected with the first main control system board card 4 and the second main control system board card 5, the power output module is used for controlling driving output by the first main control system board card 4 and the second main control system board card 5, the first main control system board card 4 and the second main control system board card 5 are respectively provided with an input circuit of an independent control system power supply 2, the first main control system board card 4 and the second main control system board card 5 are in communication connection through a communication signal line 12, and the communication connection comprises an optical fiber, a network cable or a communication bus.
The main control system board card and the frequency converter are provided with sampling signal lines, the sampling signal lines comprise an input voltage sampling signal line 6 and an input current sampling signal line 8 which are arranged between the input ends of the frequency converter, an output voltage sampling signal line 9 and an output current sampling signal line 10 which are arranged between the output ends of the frequency converter, a switch is arranged on a connecting line between the main control system board card and the control system power supply 2, the main control system board card is respectively provided with a corresponding on-line replacement sampling bypass device on each sampling signal line, each on-line replacement sampling bypass device is respectively provided with a selection switch, the selection switches of the on-line replacement sampling bypass devices are arranged on one side of the output ends of a loop formed by the sampling signal lines and the main control system board card when the main control system board card normally operates, and when the main control system board card needs maintenance, the selection switches of the on-line replacement sampling bypass devices are arranged on one side of the grounding ends, and the connection between the corresponding sampling signal lines and the main control system board card is disconnected.
The first main control system board card 4 or the second main control system board card 5 can drive the power output module to output voltage, the driving motor 11 operates, the first main control system board card 4 and the second main control system board card 5 adopt a redundancy mechanism, and the failure of any main control system board card does not affect the continuous operation of the output voltage of the power output module.
When one set of main control system board card fails, if the main control system board card is a board card of a driving power module, a starting signal is transmitted to the other set of main control system board card with normal functions through a communication signal line, the other set of main control system board card drives the power module to operate, the board card can be replaced or maintained on line, a switch between the corresponding main control system board card which needs to be replaced or maintained and a power supply of a control system is disconnected, then a selection switch of a corresponding on-line replacement sampling bypass device is arranged on one side of the ground, a corresponding sampling signal line is disconnected from the main control system board card, and the main control system board card can be disassembled for maintenance.
Because the power output module is driven and operated by one of the two sets of main control system boards, when the main control system board in non-current driving work fails, the main control system of the frequency converter has only less redundancy function, and a starting signal is not required to be transmitted between the two sets of main control system boards.
After the main control system board card is replaced or maintained, a selection switch of the on-line replacement sampling bypass device is arranged at an output end, a corresponding sampling signal line and the main control system board card form a loop, then a switch between the main control system board card and a power supply of a control system is closed, and the main control system board card is recovered to normal functions. When another set of main control system board card fails, the starting signal is transmitted through the communication signal line, and the power output module can be automatically switched back to the repaired main control system board card to drive the power output module to continue to operate.
Specifically, in this embodiment, the first main control system board card 4 is provided with an input voltage sampling signal line 6, an output voltage sampling signal line 9, an input current sampling signal line 8 and an output current sampling signal line 10, and each line is provided with a corresponding online replacement sampling bypass device, and the online replacement sampling bypass device 7 includes an online replacement sampling bypass device ISVA, an online replacement sampling bypass device ISIA, an online replacement sampling bypass device OSVA, and an online replacement sampling bypass device OSIA, which are corresponding to the input voltage, the output voltage, and the output current, which are provided on each sampling signal line, and the first main control system board card 4 is connected with the control system power supply 2 through a switch KA.
Similarly, the second main control system board card 5 is also provided with an input voltage sampling signal line, an output voltage sampling signal line, an input current sampling signal line and an output current sampling signal line, and each line is provided with a corresponding online replacement sampling bypass device, the online replacement sampling bypass device 7 comprises an input voltage online replacement sampling bypass device ISVB, an input current online replacement sampling bypass device ISIB 74, an output voltage online replacement sampling bypass device OSVB 77 and an output current online replacement sampling bypass device OSIB 78 which are correspondingly arranged on each sampling signal line, and the second main control system board card 5 is connected with the control system power supply 2 through a switch KB.
And a communication signal line 12 is arranged between the first main control system board card 4 and the second main control system board card 5 to form a control system redundancy mechanism.
Each on-line replacement sampling bypass device is respectively provided with a bidirectional selection switch, when the bidirectional selection switch is selected to be connected with one side of the grounding end and form a loop with the earth, the connection between the corresponding sampling signal line and the main control system board card is disconnected, and when the bidirectional selection switch is connected with the output end of the other side, the corresponding sampling signal line is connected with the main control system board card to form a connection loop.
Optionally, the sampling signal line of the frequency converter includes one or more of an input voltage sampling signal line, an input current sampling signal line, an output voltage sampling signal line and an output current sampling signal line.
The working flow and working principle of the utility model are as follows:
When the first main control system board card 4 needs to be maintained, the switch KA between the power supply 2 of the control system and the first main control system board card 4 is disconnected, then the bidirectional selection switches of the input voltage on-line replacement sampling bypass device ISVA, the input current on-line replacement sampling bypass device ISIA, the output voltage on-line replacement sampling bypass device OSVA and the output current on-line replacement sampling bypass device OSIA are all connected with the ground, and then all external connectors and communication signal lines of the first main control system board card 4 can be manually disconnected, so that the first main control system board card 4 can be replaced or maintained.
After the first main control system board card 4 is maintained or replaced, all external connectors and communication signal lines of the first main control system board card 4 are manually connected, the input voltage on-line replacement sampling bypass device ISVA, the input current on-line replacement sampling bypass device ISIA, the output voltage on-line replacement sampling bypass device OSVA and the bidirectional selection switch of the output current on-line replacement sampling bypass device OSIA are connected with the first main control system board card 4, and then after a switch KA between the first main control system board card 4 and the control system power supply 2 is closed, the first main control system board card 4 is recovered to normal use, and the main control system of the frequency converter recovers redundant functions.
Similarly, when the second main control system board card 5 needs to be maintained, the switch KB between the power supply 2 of the control system and the second main control system board card 5 is disconnected, then the input voltage on-line replacement sampling bypass device ISVB, the input current on-line replacement sampling bypass device ISIB 74, the output voltage on-line replacement sampling bypass device OSVB and the bidirectional selection switch of the output current on-line replacement sampling bypass device OSIB 78 are all connected with the ground, and then all external connectors and communication signal lines of the second main control system board card 5 can be manually disconnected, so that the second main control system board card 5 can be replaced or maintained.
After the maintenance or replacement of the second main control system board 5 is finished, all external connectors and communication signal lines of the second main control system board 5 are manually connected, then the input voltage on-line replacement sampling bypass device ISVB, the input current on-line replacement sampling bypass device ISIB 74, the output voltage on-line replacement sampling bypass device OSVB and the bidirectional selection switch of the output current on-line replacement sampling bypass device OSIB 78 are connected with the second main control system board 5, and then after a switch KB between the second main control system board 5 and the power supply 2 of the control system is closed, the second main control system board 5 is recovered to normal use, and the main control system of the frequency converter recovers redundant functions.
The foregoing description is only of the preferred embodiments of the utility model, it being understood that the embodiments are not intended to limit the scope of the utility model, but rather should be construed as excluding other embodiments of the various combinations, equivalents, or adaptations of the utility model to the environment, and modifications and variations may be made by those of ordinary skill in the art within the scope of the utility model, without departing from the spirit and scope of the utility model, by combining the foregoing embodiments with the relevant art and knowledge in the field, and obtaining other corresponding drawings from the structures shown in the drawings without undue effort.
Claims (4)
1. The utility model provides a but on-line maintenance master control system integrated circuit board's converter which characterized in that: comprises an input power supply module, a power output module and a main control system board card which are sequentially connected in a circuit way, wherein the main control system board card is provided with a plurality of sets with the same structure,
The input power supply module is connected with an external frequency converter power supply grid, the input end of the power output module is connected with the input power supply module, the output end of the power output module is used as the external output end of the frequency converter to be connected with an external electric motor,
The power output module is also connected with a plurality of sets of main control system boards at the same time, the power output module is controlled by a single set of main control system boards to drive and output, a plurality of sets of main control system boards are all connected through communication signal lines,
The main control system board is characterized in that a sampling signal line is arranged between the main control system board and the frequency converter, the main control system board is respectively provided with a corresponding on-line replacement sampling bypass device on each sampling signal line, the on-line replacement sampling bypass device is provided with a selection switch, when the main control system board is in normal operation, the selection switch of the on-line replacement sampling bypass device is arranged on one side of an output end of a loop formed by the sampling signal line and the main control system board, when the main control system board needs to be maintained, the selection switch of the on-line replacement sampling bypass device is arranged on one side of a grounding end, and the connection between the corresponding sampling signal line and the main control system board is in a disconnection state.
2. The frequency converter capable of maintaining a main control system board card on line according to claim 1, wherein the frequency converter is characterized in that: each set of master control system board card comprises an input circuit of an independent control system power supply, and a switch is arranged on a connecting line between the master control system board card and the control system power supply.
3. The frequency converter capable of maintaining a main control system board card on line according to claim 2, wherein: the sampling signal line comprises an input voltage sampling signal line and an input current sampling signal line which are arranged between the main control system board card and the input end of the frequency converter, and one or more of an output voltage sampling signal line and an output current sampling signal line which are arranged between the main control system board card and the output end of the frequency converter.
4. The frequency converter capable of maintaining a main control system board card on line according to claim 1, wherein the frequency converter is characterized in that: the frequency converter adopts two sets or more than two sets of main control system boards, and communication signal wires for connection between the main control system boards selectively adopt optical fibers, network cables or communication buses according to the number of the main control system boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421289603.3U CN221305748U (en) | 2024-06-06 | 2024-06-06 | Frequency converter capable of maintaining master control system board card on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421289603.3U CN221305748U (en) | 2024-06-06 | 2024-06-06 | Frequency converter capable of maintaining master control system board card on line |
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| Publication Number | Publication Date |
|---|---|
| CN221305748U true CN221305748U (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421289603.3U Active CN221305748U (en) | 2024-06-06 | 2024-06-06 | Frequency converter capable of maintaining master control system board card on line |
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| Country | Link |
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| CN (1) | CN221305748U (en) |
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- 2024-06-06 CN CN202421289603.3U patent/CN221305748U/en active Active
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