CN202840663U - Automatic bypass device of high-voltage variable frequency control system - Google Patents
Automatic bypass device of high-voltage variable frequency control system Download PDFInfo
- Publication number
- CN202840663U CN202840663U CN2012205510878U CN201220551087U CN202840663U CN 202840663 U CN202840663 U CN 202840663U CN 2012205510878 U CN2012205510878 U CN 2012205510878U CN 201220551087 U CN201220551087 U CN 201220551087U CN 202840663 U CN202840663 U CN 202840663U
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- contactor
- variable frequency
- branch road
- frequency
- bypass device
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Abstract
The utility model provides an automatic bypass device of a high-voltage variable frequency control system. The automatic bypass device comprises a first contactor, a second contactor, third contactors, a first knife switch and a second knife switch. The first contactor is connected to an input end of a high-voltage inverter, and the second contactor is connected to an output end of the high-voltage inverter, so that a high-voltage variable frequency branch is formed. The third contactors are parallelly connected to two ends of the high-voltage variable frequency branch, so that a power frequency branch is formed. The first and second contactors on the high-voltage variable frequency branch are opposite to the third contactors on the power frequency branch in switching phase. The first knife switch and the first contactor are parallelly connected to the input end of the high-voltage inverter. The second knife switch and the second contactor are serially connected to the output end of the high-voltage inverter. When the high-voltage inverter fails, power frequency bypass operation is automatically switched in, so that normal use is no affected for users. The first and second knife switches can be conveniently and manually switched off to form evident break points to ensure safety of workers during maintenance.
Description
Technical field
The utility model relates to a kind of high voltage converter, is specifically related to a kind of high-pressure frequency-conversion control system automatic bypass device.
Background technology
Frequency converter is to use converter technique and microelectric technique, and the frequency by changing the motor operation power supply and the mode of amplitude are controlled the electric power transfer element of alternating current motor.The effect of frequency converter is frequency and the amplitude that changes the alternating current motor power supply, thereby changes the cycle of its moving magnetic field, reaches the purpose of level and smooth control motor speed.The appearance of frequency converter, so that the speed regulating control of amplitude is oversimplified, when present high voltage converter breaks down, the power supply meeting of motor is cut off immediately, when frequency converter is overhauled, also must cut off the power supply in addition, therefore, affect user's normal use, brought inconvenience to the user, when maintenance, also easily occurred simultaneously dangerous.
Summary of the invention
For the problems referred to above that prior art exists, the utility model provides a kind of and still can work on when high voltage converter breaks down or overhaul, and does not affect the automatic bypass device of high-pressure frequency-conversion control of user's normal use.
For achieving the above object, technical solution adopted in the utility model is: a kind of high-pressure frequency-conversion control system automatic bypass device is characterized in that: comprise the first contactor, the second contactor, the 3rd contactor, the first disconnecting link and the second disconnecting link; Described the first contactor is connected to the input of high voltage converter, and the second contactor is connected to the output of high voltage converter, consists of thus the high-pressure frequency-conversion branch road; The 3rd contactor is parallel to the two ends of described high-pressure frequency-conversion branch road, consists of the power frequency branch road; The first contactor on the described high-pressure frequency-conversion branch road and the second contactor are with the switch inverse setting of the 3rd contactor on the power frequency branch road; Described the first disconnecting link and the series connection of the first contactor are connected to the input of high voltage converter, and the second disconnecting link is connected with the second contactor and is connected to the output of high voltage converter.
With respect to prior art, the utlity model has following advantage: the utility model arranges respectively the first contactor, the second contactor formation frequency conversion branch road by the input and output side at high voltage converter, and be provided with the power frequency branch road of the 3rd contactor in parallel, when high voltage converter breaks down, automatically switch and enter power frequency bypass operation conditions, assurance is continuously the motor power supply, thereby can not affect user's normal use.Also comprise the first disconnecting link and the second disconnecting link, during convenient maintenance by manual disconnection to form obvious cut-off point, guarantee staff's safety.
Description of drawings
The circuit theory diagrams of Fig. 1-the utility model embodiment 1.
Among the figure, 1-high voltage converter, 2-system high pressure bus, 3-switch cubicle high-voltage switch gear, 4-motor, 5-load, 61-the first contactor, 62-the second contactor, 63-the 3rd contactor, 71-the first disconnecting link, 72-the second disconnecting link.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Embodiment 1:As shown in Figure 1, a kind of high-pressure frequency-conversion control system automatic bypass device, by the first contactor 61, the second contactor 62 and the 3rd contactor 63, and the first disconnecting link 71 and the second disconnecting link 72 formations;
Described the first disconnecting link 71 and the first contactor 61 are connected successively and are connected to the input of high voltage converter 1, and the second contactor 62 is connected successively with the second disconnecting link 72 and is connected to the output of high voltage converter 1, consists of thus the high-pressure frequency-conversion branch road; The 3rd contactor 63 is parallel to the two ends of described high-pressure frequency-conversion branch road, consists of the power frequency branch road;
The switch inverse setting of the 3rd contactor 63 on the first contactor 61 on the described high-pressure frequency-conversion branch road and the second contactor 62 and the power frequency branch road.
The first disconnecting link 71, the second disconnecting link 72 machinery-free blocking functions all are in closure state under power frequency and converting operation situation; Just when maintenance by manual disconnection to form obvious cut-off point, guarantee staff's safety.The first contactor 61 and the second contactor 62 possess the electric blocking function, with the first contactor 61 and the second contactor 62, are designed to the anti-phase setting of closure/disconnect with the 3rd contactor 63, and guaranteeing can be closed simultaneously.Described contactor adopts existing mature technology.
Under the converting operation situation, the first disconnecting link 71 and the second disconnecting link 72 closures, and the first contactor 61 and the second contactor 62 closures, the 3rd contactor 63 disconnects.Automatically switch to power frequency operation such as need, can stop first high voltage converter 1 output this moment, tripping operation custom system bus mains switch, disconnect successively the first contactor 61 and the second contactor 62 by electrical control again, then closed the 3rd contactor 63 makes motor 4 switch to the power frequency side, Closing Switch cabinet high-voltage switch gear 3 makes the motor power frequency operation again.
Under power frequency bypass operation conditions, the 3rd contactor 63 closures, the first contactor 61 and the second contactor 62 disconnect.Automatically switch to converting operation such as need, can control first trip system bus mains switch this moment by electric wiring, disconnect again the 3rd contactor 63, then successively closed the first contactor 61 and the second contactor 62, closed high cabinet high-voltage switch gear 3 again, start high voltage converter 1, finish the automatic switchover that is run to converting operation by the power frequency bypass.
In addition, the switching between converting operation state and the power frequency operation state according to actual conditions, also can be selected the power switch cabinet high-voltage switch gear 3 of being failure to actuate, and finishes whole change actions by described three contactors.
Embodiment 2:Referring to Fig. 1, a kind of high-pressure frequency-conversion control system automatic bypass device is made of the first contactor 61, the second contactor 62 and the 3rd contactor 63; Described the first contactor 61 is connected to the input of high voltage converter 1, and the second contactor 62 is connected to the output of high voltage converter 1, consists of thus the high-pressure frequency-conversion branch road; The 3rd contactor 63 is parallel to the two ends of described high-pressure frequency-conversion branch road, consists of the power frequency branch road; The first contactor 61 on the described high-pressure frequency-conversion branch road and the second contactor 62 are with the switch inverse setting of the 3rd contactor 63 on the power frequency branch road.
As different from Example 1, when not having convenient maintenance by manual disconnection to form obvious cut-off point, must cut off the power supply can carry out fully whole circuit when needing maintenance.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (1)
1. a high-pressure frequency-conversion control system automatic bypass device is characterized in that: comprise the first contactor (61), the second contactor (62), the 3rd contactor (63), the first disconnecting link (71) and the second disconnecting link (72); Described the first contactor (61) is connected to the input of high voltage converter (1), and the second contactor (62) is connected to the output of high voltage converter (1), consists of thus the high-pressure frequency-conversion branch road; The 3rd contactor (63) is parallel to the two ends of described high-pressure frequency-conversion branch road, consists of the power frequency branch road; The first contactor (61) on the described high-pressure frequency-conversion branch road and the second contactor (62) are with the switch inverse setting of the 3rd contactor (63) on the power frequency branch road; Described the first disconnecting link (71) and the first contactor (61) series connection are connected to the input of high voltage converter (1), and the second disconnecting link (72) is connected with the second contactor (62) and is connected to the output of high voltage converter (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205510878U CN202840663U (en) | 2012-10-25 | 2012-10-25 | Automatic bypass device of high-voltage variable frequency control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205510878U CN202840663U (en) | 2012-10-25 | 2012-10-25 | Automatic bypass device of high-voltage variable frequency control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202840663U true CN202840663U (en) | 2013-03-27 |
Family
ID=47952278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205510878U Expired - Fee Related CN202840663U (en) | 2012-10-25 | 2012-10-25 | Automatic bypass device of high-voltage variable frequency control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202840663U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991068A (en) * | 2015-02-04 | 2016-10-05 | 国网河南省电力公司郑州供电公司 | Device applied to high-voltage motor frequency conversion transformation and a transformation method of device |
| CN111255575A (en) * | 2020-03-13 | 2020-06-09 | 东方日立(成都)电控设备有限公司 | Speed regulating system and speed regulating method for high-capacity gas turbine |
-
2012
- 2012-10-25 CN CN2012205510878U patent/CN202840663U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991068A (en) * | 2015-02-04 | 2016-10-05 | 国网河南省电力公司郑州供电公司 | Device applied to high-voltage motor frequency conversion transformation and a transformation method of device |
| CN111255575A (en) * | 2020-03-13 | 2020-06-09 | 东方日立(成都)电控设备有限公司 | Speed regulating system and speed regulating method for high-capacity gas turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |