CN204096972U - Tower crane frequency conversion revolution dead slow speed control system - Google Patents
Tower crane frequency conversion revolution dead slow speed control system Download PDFInfo
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- CN204096972U CN204096972U CN201420531400.0U CN201420531400U CN204096972U CN 204096972 U CN204096972 U CN 204096972U CN 201420531400 U CN201420531400 U CN 201420531400U CN 204096972 U CN204096972 U CN 204096972U
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- frequency converter
- programmable logic
- logic controller
- revolution
- slow speed
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- 230000005540 biological transmission Effects 0.000 description 1
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Abstract
The utility model relates to a kind of tower crane frequency conversion revolution dead slow speed control system of the fine motion speed governing when crane rotation low cruise, comprise Programmable Logic Controller N300 and frequency converter U300, the input end of Programmable Logic Controller N300 takes back the master cock S300 that becomes a full member, revolution reverse control switch S301, revolution rotates forward limit switch S311, revolution reversion limit switch S313 and frequency converter U300 input end M1, M2, the output termination AC contactor KM340 of Programmable Logic Controller N300 and the FWD end of frequency converter U300 are held with REV, the mouth of frequency converter U300 takes back rotating motor M and resistance R300, the input end that the utility model connects frequency converter U300 at Programmable Logic Controller N300 is connected to dead slow speed change-over switch S234, corresponding Programmable Logic Controller N300 exports the MSP end of termination frequency converter U300.The utility model utilizes PLC+ frequency converter, tuning parameter, by fork shift switching over, realizes dead slow speed controlling functions.Adopt dead slow speed revolution mode, use low-angle in place more accurate, user uses convenient.
Description
Technical field
The utility model relates to tower crane frequency conversion rotary control system, particularly can the dead slow speed control system of fine motion speed governing when turning round low cruise.
Background technology
At present, domestic tower crane uses the revolution speed governing system of variable frequency control generally to be applied, and contrasts old-fashioned SCR control speed governing system, has the advantages such as easy and simple to handle, intuitive display, in mode, adopt potential device infinite speed variation or multistage speed control system.But due in use, user, on certain applying working condition, needs low cruise, and no matter what use now is variable frequency control or thyristor controlled speed governing system, all very perfectly cannot realize low cruise.Swing type mechanism is one of large transmission device of tower crane most important three, and the quality of revolution controller performance determines the quality of tower machine overall performance, will turn round dead slow speed function access control system, and to the performance promoting tower crane, have great effect.
Summary of the invention
The purpose of this utility model is to provide a kind of tower crane frequency conversion revolution dead slow speed control system, this system can require to carry out regulating, setting different speed according to different operating mode, different user, to meet the requirement of dissimilar tower crane, slow in place time stable, reliable.
The technical solution adopted in the utility model is: tower crane frequency conversion revolution dead slow speed control system comprises Programmable Logic Controller N300 and frequency converter U300, the input end of Programmable Logic Controller N300 takes back the master cock S300 that becomes a full member, revolution reverse control switch S301, revolution rotates forward limit switch S311, revolution reversion limit switch S313 and frequency converter U300 input end M1, M2, the output termination AC contactor KM340 of Programmable Logic Controller N300 and the FWD end of frequency converter U300 are held with REV, the mouth of frequency converter U300 takes back rotating motor M and resistance R300, the input end that the utility model connects frequency converter U300 at Programmable Logic Controller N300 is connected to dead slow speed change-over switch S234, corresponding Programmable Logic Controller N300 exports the MSP end of termination frequency converter U300.At A1, the AC ,+V termination potential device RP300 of frequency converter U300.
During normal work, dead slow speed change-over switch S234 is in off-state, swing type mechanism carries out work with normal speed, revolution rotates forward master cock S300 and controls pivotal rotating forward, Programmable Logic Controller N300 exports termination frequency converter FWD end, after spacing to revolution rotating forward limit switch S311, revolution rotates forward to disconnect and stops; Revolution reverse control switch S301 controls pivotal reversion, and Programmable Logic Controller N300 exports termination frequency converter REV end, and after spacing to revolution reversion limit switch S313, revolution reversion disconnects and stopping.Speeds control relies on potential device RP300 to control the A1 end of frequency converter U300, and the larger speed of angle is faster.By frequency converter U300 drive motor M300, motor M is in and rotates forward or in the operation of reversion, as when parking, discharged by braking resistor R300, swing type mechanism pulsation-free is run.
When needs accurate positioning, dead slow speed change-over switch S234 can be pushed on-state, now by the dead slow speed input MSP point of Programmable Logic Controller N300 output point access frequency converter U300, now again operation revolution time (with normally work identical), turn round and run with very low speed, meanwhile, this parameter can be set by potential device RP300 according to actual conditions, while easy to use, different operating modes can also be adapted to.The utility model utilizes PLC+frequency converter, tuning parameter, by fork shift switching over, realizes dead slow speed controlling functions.Adopt dead slow speed revolution mode, use low-angle in place more accurate, user uses convenient.
Accompanying drawing explanation
Fig. 1 is schematic circuit diagram of the present utility model.
Detailed description of the invention
Tower crane frequency conversion revolution dead slow speed control system comprises Programmable Logic Controller N300 and frequency converter U300, and Programmable Logic Controller N300 model is CPM2AH, and frequency converter U300 model is ATV71.220V source of AC connects L, N end of Programmable Logic Controller N300, and 380V source of AC connects R, S, T end of frequency converter U300.0.00 input end of Programmable Logic Controller N300 takes back the master cock S300 that becomes a full member, 0.01 input end of Programmable Logic Controller N300 takes back and turns reverse control switch S301, 0.02 input end of Programmable Logic Controller N300 takes back the limit switch S311 that becomes a full member, 0.03 input end of Programmable Logic Controller N300 takes back and turns reversion limit switch S313, 0.04 input end of Programmable Logic Controller N300, 0.05 input termination frequency converter U300 input end M1, M2, dead slow speed change-over switch S234 is connected between 0.04 input end and frequency converter U300 input end M1 of Programmable Logic Controller N300.10.00 of Programmable Logic Controller N300 exports termination AC contactor KM340, and open contact 3-4,5-6 of AC contactor KM340 are connected on the power input of turning motor drg YB300.10.04 of Programmable Logic Controller N300 exports the FWD end of termination frequency converter U300,10.05 of Programmable Logic Controller N300 exports the REV end of termination frequency converter U300,10.06 of Programmable Logic Controller N300 exports the MSP end of termination frequency converter U300, the A1 of frequency converter U300, AC ,+V input termination potential device RP300, U, V, M mouth of frequency converter U300 takes back rotating motor M, B1, B2 mouth connecting resistance R300 of frequency converter U300.
Claims (2)
1. a tower crane frequency conversion revolution dead slow speed control system, comprise Programmable Logic Controller N300 and frequency converter U300, the input end of Programmable Logic Controller N300 takes back the master cock S300 that becomes a full member, revolution reverse control switch S301, revolution rotates forward limit switch S311, revolution reversion limit switch S313 and frequency converter U300 input end M1, M2, the output termination AC contactor KM340 of Programmable Logic Controller N300 and the FWD end of frequency converter U300 are held with REV, the mouth of frequency converter U300 takes back rotating motor M and resistance R300, it is characterized in that: the input end connecting frequency converter U300 at Programmable Logic Controller N300 is connected to dead slow speed change-over switch S234, corresponding Programmable Logic Controller N300 exports the MSP end of termination frequency converter U300.
2. tower crane frequency conversion revolution dead slow speed control system according to claim 1, is characterized in that: at A1, the AC ,+V termination potential device RP300 of frequency converter U300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531400.0U CN204096972U (en) | 2014-09-17 | 2014-09-17 | Tower crane frequency conversion revolution dead slow speed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531400.0U CN204096972U (en) | 2014-09-17 | 2014-09-17 | Tower crane frequency conversion revolution dead slow speed control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204096972U true CN204096972U (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420531400.0U Expired - Lifetime CN204096972U (en) | 2014-09-17 | 2014-09-17 | Tower crane frequency conversion revolution dead slow speed control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN204096972U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329779A (en) * | 2015-12-02 | 2016-02-17 | 天津德仕达起重输送设备有限公司 | Crane multi-speed-mode control method and control system |
-
2014
- 2014-09-17 CN CN201420531400.0U patent/CN204096972U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329779A (en) * | 2015-12-02 | 2016-02-17 | 天津德仕达起重输送设备有限公司 | Crane multi-speed-mode control method and control system |
| CN105329779B (en) * | 2015-12-02 | 2017-03-29 | 天津德仕达起重输送设备有限公司 | Crane multiple speed modes control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150114 |