CN105739429A - Method for reducing power grid impact in starting and stopping large-tonnage die casting machine - Google Patents
Method for reducing power grid impact in starting and stopping large-tonnage die casting machine Download PDFInfo
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- CN105739429A CN105739429A CN201610274282.3A CN201610274282A CN105739429A CN 105739429 A CN105739429 A CN 105739429A CN 201610274282 A CN201610274282 A CN 201610274282A CN 105739429 A CN105739429 A CN 105739429A
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- starting
- load
- stopping
- die casting
- casting machine
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1173—Activating output only if powersupply is sufficient
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Motor And Converter Starters (AREA)
Abstract
The invention discloses a method for reducing power grid impact in starting and stopping a large-tonnage die casting machine. The method comprises the following steps of (A), in starting, successively starting loads by an PLC according to a sequence; and (B) in stopping, stopping the loads by the PLC according to a sequence of firstly starting and stopping. According to the method of the invention, through successively starting and stopping and decomposing a large load, a supply voltage can be well controlled in a voltage range which is required in power grid operation and ensures safe operation of equipment.
Description
Technical field
The present invention relates to die casting machine, particularly relate to a kind of method electrical network impacted when improving large-tonnage die casting machine start and stop.
Background technology
Large-tonnage die casting machine generally all adopts multiple powerful motor or the mode of operation of the multiple oil pump of servo driver drives.Such as following two mode；1, there is employing to start, the mode simultaneously stopped simultaneously.When adopting which to start, load transients increase is very big, power supply grid voltage instantaneous can be caused too low, even can cause other equipment misoperation because of brownout of same power supply grid；During stopping, load transients reduces a lot, can cause power supply grid transient operation overvoltage, the safe operation of harm equipment.2, employing is had to start successively, the mode simultaneously stopped.During startup, can ensure not result in line voltage preferably too low, but when stopping, equally also producing switching overvoltage, the safe operation of harm equipment.
Summary of the invention
For solving above-mentioned technical problem, it is an object of the invention to provide a kind of method electrical network impacted when improving large-tonnage die casting machine start and stop.
The technical solution used in the present invention is:
A kind of method electrical network impacted when improving large-tonnage die casting machine start and stop, comprises the following steps (A) when starting, and PLC starts each load in order successively；(B), when stopping, PLC, by first starting the order stopped afterwards, stops each load.
Described step (A) and (B) are decomposed into multiple less load heavy load, start successively, so that the Sudden Changing Rate of load controls in the tolerance band of operation of power networks.
Described load is servo-driver or threephase asynchronous machine.
Beneficial effects of the present invention: the present invention passes through sequence starting and stopping, the method combining decomposition heavy load, can preferably supply voltage be controlled when operation of power networks within the scope of required voltage, it is ensured that the safe operation of equipment.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present invention, rather than whole embodiments, and those skilled in the art is under accompanying drawing illustrates premise, it is thus achieved that other designs and accompanying drawing:
Fig. 1 is the three-phase power loop of first embodiment of the invention；
Fig. 2 is the input side PLC starting or stopping control circuit of first embodiment of the invention；
Fig. 3 is the outlet side PLC starting or stopping control circuit of first embodiment of the invention；
The load that Fig. 4 is first embodiment of the invention starts control loop；
Fig. 5 be second embodiment of the invention three-phase power loop 1.；
Fig. 6 be second embodiment of the invention three-phase power loop 2.；
Fig. 7 is the input side PLC starting or stopping control circuit of second embodiment of the invention；
Fig. 8 is the outlet side PLC starting or stopping control circuit of second embodiment of the invention；
1. the load that Fig. 9 is second embodiment of the invention starts control loop；
2. the load that Figure 10 is second embodiment of the invention starts control loop.
The main electrical scheme terminal block of the main electronic box of accompanying drawing labelling :-XO, QF chopper, KM catalyst, KA relay, FR fuse, M threephase asynchronous machine.
Detailed description of the invention
A kind of method that electrical network is impacted when improving large-tonnage die casting machine start and stop by the present invention, comprise the following steps: during startup, start each load successively, heavy load is decomposed into multiple less load, start successively, the Sudden Changing Rate of load is controlled in the tolerance band of operation of power networks；During stopping, by first starting the order stopped afterwards, stop each load, heavy load is decomposed into multiple less load, the Sudden Changing Rate of load is controlled in the tolerance band of operation of power networks.The safe operation of guarantee equipment.
With reference to shown in Fig. 1-Fig. 4, for the first embodiment of the present invention, load adopts four groups of servo-drivers, and its work process is: when PLC powers on, and KA1 is electricly instantaneous, and the 8 of KA1,12 contacts are connected, ready for starting.
After pressing ST2 startup button, after first exporting the 56 of Q001,1KM1,57 contacts connection 5 seconds, output the 13 of Q002,2KM1,14 contact exports Q003 after connecting 5 seconds, after the 13 of 3KM1,14 contacts are connected 5 seconds, export Q004, thus completing four groups of servo-driver sequence startings.
After ST1 stop button, first Q004 stops output, after 5 seconds, Q003 stops output, after 5 seconds, Q002 stops output, and after Q002 stops output 5 seconds, Q000, Q001 stop output simultaneously, stop thus completing four groups of servo-driver orders, finally, after time delay 5 seconds, Q000 recovers output and also remains to next dwelling period.
With reference to shown in Fig. 5-Figure 10, for the second embodiment of the present invention, load adopts four groups of threephase asynchronous machines, and its work process is: when PLC powers on, and KA1 is electricly instantaneous, and the 8 of KA1,12 contacts are connected, ready for starting.
After pressing ST2 startup button, after first exporting the 13 of Q001,1KM2,14 contacts connection 5 seconds, output the 13 of Q002,2KM2,14 contact exports Q003 after connecting 5 seconds, after the 13 of 3KM2,14 contacts are connected 5 seconds, export Q004, thus completing four groups of threephase asynchronous machine sequence startings.
After ST1 stop button, first Q004 stops output, after 5 seconds, Q003 stops output, after 5 seconds, Q002 stops output, and after Q002 stops output 5 seconds, Q000, Q001 stop output simultaneously, stop thus completing four groups of threephase asynchronous machine orders, finally, after time delay 5 seconds, Q000 recovers output and also remains to next dwelling period.
The foregoing is only the preferred embodiments of the present invention, the present invention is not limited to above-mentioned embodiment, broadly falls within protection scope of the present invention as long as realizing the technical scheme of the object of the invention with essentially identical means.
Claims (3)
1. method when improving large-tonnage die casting machine start and stop, electrical network impacted, it is characterised in that: comprising the following steps (A) when starting, PLC starts each load in order successively；(B), when stopping, PLC, by first starting the order stopped afterwards, stops each load.
2. a kind of method electrical network impacted when improving large-tonnage die casting machine start and stop according to claim 1, it is characterized in that: described step (A) and (B) are decomposed into multiple less load heavy load, start successively, so that the Sudden Changing Rate of load controls in the tolerance band of operation of power networks.
3. a kind of method electrical network impacted when improving large-tonnage die casting machine start and stop according to claim 1, it is characterised in that: described load is servo-driver or threephase asynchronous machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274282.3A CN105739429A (en) | 2016-04-27 | 2016-04-27 | Method for reducing power grid impact in starting and stopping large-tonnage die casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274282.3A CN105739429A (en) | 2016-04-27 | 2016-04-27 | Method for reducing power grid impact in starting and stopping large-tonnage die casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105739429A true CN105739429A (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610274282.3A Pending CN105739429A (en) | 2016-04-27 | 2016-04-27 | Method for reducing power grid impact in starting and stopping large-tonnage die casting machine |
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| CN (1) | CN105739429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113881557A (en) * | 2021-10-18 | 2022-01-04 | 北京中鼎恒业科技股份有限公司 | Fermentation system and fermentation cylinder based on thing networking |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986222A (en) * | 2010-11-22 | 2011-03-16 | 襄垣县树元电器有限公司 | Multichannel load time program control device |
| CN201895939U (en) * | 2010-12-10 | 2011-07-13 | 郁清林 | Main motor starting/stopping and belt conveyor control device of main belt conveyor for coal mine |
| CN104456844A (en) * | 2014-11-19 | 2015-03-25 | 珠海格力电器股份有限公司 | air conditioning unit control method and device |
| CN204508083U (en) * | 2015-03-08 | 2015-07-29 | 河南工业职业技术学院 | A kind of industrial control network teaching automatic production line training device |
-
2016
- 2016-04-27 CN CN201610274282.3A patent/CN105739429A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986222A (en) * | 2010-11-22 | 2011-03-16 | 襄垣县树元电器有限公司 | Multichannel load time program control device |
| CN201895939U (en) * | 2010-12-10 | 2011-07-13 | 郁清林 | Main motor starting/stopping and belt conveyor control device of main belt conveyor for coal mine |
| CN104456844A (en) * | 2014-11-19 | 2015-03-25 | 珠海格力电器股份有限公司 | air conditioning unit control method and device |
| CN204508083U (en) * | 2015-03-08 | 2015-07-29 | 河南工业职业技术学院 | A kind of industrial control network teaching automatic production line training device |
Non-Patent Citations (1)
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| 温瑞等: "《维修电工实训》", 31 January 2013, 中国建材工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113881557A (en) * | 2021-10-18 | 2022-01-04 | 北京中鼎恒业科技股份有限公司 | Fermentation system and fermentation cylinder based on thing networking |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160706 |
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| RJ01 | Rejection of invention patent application after publication |