CN204967675U - Converter multimachine synchro control device - Google Patents
Converter multimachine synchro control device Download PDFInfo
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- CN204967675U CN204967675U CN201520725486.5U CN201520725486U CN204967675U CN 204967675 U CN204967675 U CN 204967675U CN 201520725486 U CN201520725486 U CN 201520725486U CN 204967675 U CN204967675 U CN 204967675U
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- frequency converter
- switching circuit
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- control device
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Abstract
The utility model discloses a converter multimachine synchro control device, including host computer, many converters and with the multiunit shunting device of many converter one -to -ones, host computer and many converter communication connection, these many converters pass through bus or fiber connection, every group shunting device includes a switch circuit, the 2nd switch circuit and the 3rd switch circuit, a switch circuit's one end and three phase current are connected, and a switch circuit's the other end is connected with the input of converter, the 2nd switch circuit connects between the input of the output of converter and motor, the 3rd switch circuit connects between the input of a switch circuit's the other end and motor. The utility model discloses can make all motors all can not shut down when the converter breaks down, improve plant operation efficiency.
Description
Technical field
The utility model relates to frequency converter multi-machine synchronous control device.
Background technology
In some application scenarios, multiple stage frequency converter is usually needed to drive multiple electric motors to realize synchronous operation respectively.When wherein a frequency converter breaks down, the motor that drives by this frequency converter can only shut down, other frequency converter also has to quit work, thus reduces the service efficiency of equipment.In addition, when existing multiple stage frequency converter is interconnected, the bus of each frequency converter is independent of one another, easily causes frequency converter energy uneven on the one hand, all consumes in brake resistance on the other hand, cause the waste of the energy when dynamic conditioning owing to braking energy consumption.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of frequency converter multi-machine synchronous control device; it can when frequency converter breaks down; the motor that the frequency converter broken down is driven and all can not being shut down by the motor of other transducer drive, thus the service efficiency improving equipment.
Technical problem to be solved in the utility model is the frequency converter multi-machine synchronous control device providing a kind of power savings good.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
Frequency converter multi-machine synchronous control device, comprise host computer, multiple stage frequency converter and organize shunting device with multiple stage frequency converter is one to one more, host computer and multiple stage frequency converter communicate to connect, and this multiple stage frequency converter is by bus or Fiber connection; Often organize shunting device and comprise the first switching circuit, second switch circuit and the 3rd switching circuit; One end of first switching circuit is connected with three phase mains, and the other end of the first switching circuit is connected with the input of frequency converter; Second switch circuit is connected between the output of frequency converter and the input of motor; Between the other end that 3rd switching circuit is connected to the first switching circuit and the input of motor.
The utility model at least has following technique effect:
1, the utility model issues setpoint frequency value by host computer to multiple stage frequency converter, the Synchronization Control to multiple electric motors can be realized, when wherein a certain frequency converter breaks down, can by controlling the shunting device corresponding with this frequency converter, the frequency converter making this break down is bypassed, and the motor that this frequency converter drives changes power frequency operation into, the running frequency of other frequency converter is also risen to power frequency simultaneously, motors all so all need not quit work, thus improves the service efficiency of equipment;
2, owing to being common bus between multiple stage frequency converter, each frequency converter can obtain energy or feedback energy from same bus, can avoid all consuming owing to braking energy consumption the energy waste caused in brake resistance when frequency converter energy inequality or dynamic conditioning, thus save electricity.
Accompanying drawing explanation
Fig. 1 shows the theory diagram of the frequency converter multi-machine synchronous control device according to the utility model one embodiment.
Fig. 2 shows the another kind of connected mode embodiment of host computer and multiple stage frequency converter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Refer to Fig. 1.Comprise host computer 1, multiple stage frequency converter 2 according to the frequency converter multi-machine synchronous control device of the utility model one embodiment and organize shunting device with multiple stage frequency converter 2 is one to one more.
Host computer 1 and multiple stage frequency converter 2 communicate to connect, and this multiple stage frequency converter 2 is connected by optical fiber 3.In the embodiment shown in fig. 1, host computer 1 communicates to connect with multiple stage frequency converter respectively, in another kind of embodiment, as shown in Figure 2, host computer 1 also can be connected with the frequency converter of wherein, using this frequency converter as primary transducer, remaining frequency converter as from frequency converter, to forward by primary transducer the instruction that host computer issues to remaining from frequency converter.Host computer 1 such as can adopt PLC.
In another embodiment, this multiple stage frequency converter 2 also can be connected by bus, and this bus can be such as CAN.
Often organize shunting device and comprise the first switching circuit K1, second switch circuit K2 and the 3rd switching circuit K3.One end of first switching circuit K1 is connected with three phase mains (not shown), and the other end of the first switching circuit K1 is connected with the input of frequency converter 2; Second switch circuit K2 is connected between the output of frequency converter 2 and the input of motor 4; Between the other end that 3rd switching circuit K3 is connected to the first switching circuit K1 and the input of motor 4.Host computer 1 is connected with the control input end of the 3rd switching circuit K3 with the control input end of the first switching circuit K1, the control input end K2 of second switch circuit respectively, in order to control connection and the disconnection of this first switching circuit K1, second switch circuit K2 and the 3rd switching circuit K3.In a kind of concrete execution mode, above-mentioned the first switching circuit K1, second switch circuit K2 and the 3rd switching circuit K3 are contactor.
During work, host computer 1 issues setpoint frequency value to multiple stage frequency converter 2, and multiple stage frequency converter 2 carries out speed governing to corresponding motor 4 respectively, thus can realize the Synchronization Control to multiple electric motors 4.The information such as running status, running current power, running frequency, busbar voltage can also be transmitted to host computer between multiple stage frequency converter.When wherein a certain frequency converter breaks down, host computer 1 controls the shunting device corresponding with this frequency converter, second switch circuit K2 is disconnected, second switch circuit K3 connects, original motor 4 driven by the frequency converter broken down is changed into the mode of power frequency operation, the running frequency of other frequency converter is also risen to power frequency, motors all so all need not quit work simultaneously, thus improves the service efficiency of equipment.
In the present embodiment, multiple stage frequency converter 2 common bus connects.The common bus 5 of this multiple stage frequency converter 2 has been shown in Fig. 1.Owing to being common bus between multiple stage frequency converter, each frequency converter can obtain energy or feedback energy from same bus, can avoid all consuming owing to braking energy consumption the energy waste caused in brake resistance when frequency converter energy inequality or dynamic conditioning, thus save electricity.
Claims (6)
1. frequency converter multi-machine synchronous control device, it is characterized in that, comprise host computer, multiple stage frequency converter and organize shunting device with described multiple stage frequency converter is one to one more, described host computer and described multiple stage frequency converter communicate to connect, and this multiple stage frequency converter is by bus or Fiber connection;
Often organize described shunting device and comprise the first switching circuit, second switch circuit and the 3rd switching circuit; One end of described first switching circuit is connected with three phase mains, and the described other end of the first switching circuit is connected with the input of frequency converter; Described second switch circuit is connected between the output of frequency converter and the input of motor; Between the other end that described 3rd switching circuit is connected to described first switching circuit and the input of described motor.
2. frequency converter multi-machine synchronous control device according to claim 1, is characterized in that, described multiple stage frequency converter common bus connects.
3. frequency converter multi-machine synchronous control device according to claim 1, is characterized in that, the first described switching circuit, second switch circuit and the 3rd switching circuit are contactor.
4. frequency converter multi-machine synchronous control device according to claim 1, is characterized in that, described host computer is PLC.
5. the frequency converter multi-machine synchronous control device according to claim 1 or 3 or 4, it is characterized in that, described host computer is connected with the control input end of described 3rd switching circuit with the control input end of described first switching circuit, the control input end of described second switch circuit respectively, in order to control connection and the disconnection of this first switching circuit, second switch circuit and the 3rd switching circuit.
6. frequency converter multi-machine synchronous control device according to claim 1, is characterized in that, described bus is CAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520725486.5U CN204967675U (en) | 2015-09-18 | 2015-09-18 | Converter multimachine synchro control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520725486.5U CN204967675U (en) | 2015-09-18 | 2015-09-18 | Converter multimachine synchro control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967675U true CN204967675U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201520725486.5U Active CN204967675U (en) | 2015-09-18 | 2015-09-18 | Converter multimachine synchro control device |
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| Country | Link |
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| CN (1) | CN204967675U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553239A (en) * | 2016-02-19 | 2016-05-04 | 天津电气科学研究院有限公司 | Frequency converter parallel control method for master-slave parallel and separated control |
| CN105763131A (en) * | 2016-04-01 | 2016-07-13 | 苏州汇川技术有限公司 | Power-off synchronous operation method and system for frequency converter |
-
2015
- 2015-09-18 CN CN201520725486.5U patent/CN204967675U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553239A (en) * | 2016-02-19 | 2016-05-04 | 天津电气科学研究院有限公司 | Frequency converter parallel control method for master-slave parallel and separated control |
| CN105763131A (en) * | 2016-04-01 | 2016-07-13 | 苏州汇川技术有限公司 | Power-off synchronous operation method and system for frequency converter |
| CN105763131B (en) * | 2016-04-01 | 2018-08-10 | 苏州汇川技术有限公司 | A kind of the power-off synchronous operation method and system of frequency converter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |