CN201877826U - System for controlling speed fluctuation of frequency converter - Google Patents
System for controlling speed fluctuation of frequency converter Download PDFInfo
- Publication number
- CN201877826U CN201877826U CN2010205931986U CN201020593198U CN201877826U CN 201877826 U CN201877826 U CN 201877826U CN 2010205931986 U CN2010205931986 U CN 2010205931986U CN 201020593198 U CN201020593198 U CN 201020593198U CN 201877826 U CN201877826 U CN 201877826U
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- China
- Prior art keywords
- frequency converter
- plc
- computer
- communication network
- speed fluctuation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Control Of Multiple Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a system for controlling speed fluctuation of a frequency converter, which mainly comprises a computer, a printer, a PLC (programmable logic controller), a frequency converter, a motor, a power grid power source, a capacitor and the like. The frequency converter is connected with the PLC through a communication network, the PLC is also connected with the computer by the aid of the communication network, the printer is mounted on the computer, and the other end of the frequency converter is respectively connected with the motor, the power grid power source and external capacitor.
Description
Technical field
The utility model relates to a kind of control system, is specifically related to the system of a kind of control of conversion device velocity perturbation.
Background technology
The brief introduction of chemical fibre spinning technique:
In chemical fibre spinning technique flow process, granular section raw material enters the section storage tank by conveying system, form the HTHP melt through screw extruder again, enter the gear wheel metering pump accurate measurement, cool off, go up oil lubrication, stretching, winding shaping product spinning cake through cross air blasting after filament spinning component flows out.
The electrical control brief introduction
All process datas are controlled, write down to The whole control system by the DCS ipc monitor, employing communication modes such as host computer and PLC, instrument and frequency converter carry out exchanges data, screw rod, measuring pump, finish pump, motors such as coiling all drive frequency converter by host computer and carry out accurate speed control, to satisfy process requirements.
Because the problem that voltage ripple of power network causes:
Owing to reasons such as thunderbolts, when electrical network point is pressed the fluctuation instant electricity loss, following situation can appear:
(1) relay control circuit can cause that whole spinning workshop section stops because the instant electricity loss phenomenon occurs from discharging;
(2) frequency converter can be because the output speed fluctuation appears in the instant electricity loss phenomenon, and phenomenons such as frequency converter detection alarm cause the parking of spinning workshop section;
In above situation, the parking of spinning workshop section can cause the product degradation, waste silk, consumptive material replacement cycle shortening etc., cause very big economic loss, and frequency converter velocity perturbation (particularly measuring pump frequency converter) more can cause the problem of the fiber number inequality of silk, phenomenons such as dyeing, lousiness in follow-up production and processing, occur, cause the total quality problem of following process product, cause bigger economic loss.
Along with the spinning production line scale is increasing, contained spinning station is more and more, frequency converter application aborning also more and more widely, voltage fluctuation is also increasing to the influence that production brings, and product quality is brought very big influence.
In order to solve problems of the prior art, the inventor has designed the system of a kind of control of conversion device velocity perturbation.
The utility model content
The purpose of this utility model is to provide a kind of control system that the line voltage transient fluctuation causes the frequency converter velocity perturbation that solves cheaply.
Control system described in the utility model mainly is made up of parts such as computer, printer, PLC (programmable logic controller (PLC)), frequency converter, motor, electric network source, electric capacity.
Above-mentioned parts can buy in the market.
Control system described in the utility model, specifically by forming with the lower member link:
Wherein, on the connection line of frequency converter 1 and electric network source 6 and external capacitor, be provided with switch.
Wherein, described external capacitor 7 is a dc filter capacitor.
Control system described in the utility model, each functions of components is respectively:
Wherein, described computer is mainly realized ipc monitor.
Wherein, described PLC mainly finishes automation control.
Wherein, described frequency converter is mainly finished according to system's demand for control and is finished accurate speed control.
Wherein, described dc capacitor is mainly finished anti-voltage ripple of power network filter action.Amount of capacity difference according to each measuring pump frequency converter, give the dc filter capacitor of every independent external different capabilities of measuring pump frequency converter, be connected to the direct voltage binding post behind the frequency converter rectifier bridge, the whole volume of dc filter capacitor improves the antijamming capability of frequency converter when voltage ripple of power network after the rectification of increase converter power supply.
Wherein, described communication connection computer and PLC and instrument, frequency converter are so that finish transfer of data between them;
Wherein, described printer connects on computers, mainly is the printing of finishing data.
The utility model also adopts at control loop increases on line type UPS back-up source (accompanying drawing), carries out online switching in the moment of mains fluctuations and solves relay control circuit and can cause that whole spinning workshop section stops because the instant electricity loss phenomenon occurs from discharging.
Control system described in the utility model has solved following problem,
Owing to reasons such as thunderbolts, when electrical network point is pressed the fluctuation instant electricity loss, following situation can appear:
(1) relay control circuit can cause that whole spinning workshop section stops because the instant electricity loss phenomenon occurs from discharging;
(2) frequency converter can be because the output speed fluctuation appears in the instant electricity loss phenomenon, and phenomenons such as frequency converter detection alarm cause the parking of spinning workshop section;
The utility model compared with prior art, it is low also to have a cost, implements easily and controls, intelligent strong, product quality is improved, effect is remarkable, and has obtained tangible economic benefit.
Description of drawings
The system of Fig. 1, the velocity perturbation of control of conversion device
Among the figure: 1, frequency converter, 2, PLC, 3, computer, 4, printer, 5, motor, 6, electric network source, 7, external capacitor, 8, communication network, 9, the on line type UPS back-up source, 10, the control power supply.
Embodiment
The invention will be further described by following specific embodiment, but not as limitation of the present invention.
Wherein, on the connection line of frequency converter 1 and electric network source 6 and external capacitor, be provided with switch.
Voltage ripple of power network causes the solution of frequency converter velocity perturbation:
We adopt frequency converter is 3 380 inputs, 3 standard frequency converters of 380 outputs (as Siemens's 440 series, peace river V7, peace river V1000 etc.) mutually mutually of standard.Screw rod frequency converter and finish pump frequency conversion device are by the setting to converter parameter, behind voltage ripple of power network, resume operation automatically, the technique change that velocity perturbation causes is in control range, do not influence product quality, and the velocity variations of measuring pump frequency conversion when voltage ripple of power network can directly influence the rotating speed of positive displacement gear wheel metering pump, and the uniformity of the fiber number of influence silk, thereby the quality of influence silk, both of these case has all obtained confirmation in actual production.
The measuring pump transducer power is about 1.5-4KW, and each spinning project frequency converter quantity does not wait to thousands of from hundreds of, all adopts the UPS power supply unrealistic, and cost is high.
Phenomenon when analyzing power network fluctuation, we adopt the scheme of adding filter capacitor for the measuring pump frequency converter to test in conjunction with on-site actual situations:
Concrete principle: according to the amount of capacity difference of each measuring pump frequency converter, give the dc filter capacitor of every independent external different capabilities of measuring pump frequency converter, the capacitance size changes according to the capacity of frequency converter is different, be connected to the direct voltage binding post behind the frequency converter rectifier bridge, the whole volume of dc filter capacitor improves the antijamming capability of frequency converter when voltage ripple of power network after the rectification of increase converter power supply.
We test at the power source spinning first phase of the permanent polyamide fibre of Fujian power Science and Technology Ltd., confirm that this scheme is practical, scheme has showed obvious effects on the whole, can accomplish measuring pump frequency converter velocity-stabilization when voltage ripple of power network basically, does not influence the fiber number of silk.
Claims (1)
1. the system of control of conversion device velocity perturbation, by forming with lower member:
Frequency converter (1) links to each other with PLC (2) by communication network, PLC (2) also relies on communication network and computer (3) connection mutually, printer (4) is installed on the computer (3), and frequency converter (1) other end connects motor (5) respectively, electric network source (6) and external capacitor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205931986U CN201877826U (en) | 2010-11-02 | 2010-11-02 | System for controlling speed fluctuation of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205931986U CN201877826U (en) | 2010-11-02 | 2010-11-02 | System for controlling speed fluctuation of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877826U true CN201877826U (en) | 2011-06-22 |
Family
ID=44165735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205931986U Expired - Lifetime CN201877826U (en) | 2010-11-02 | 2010-11-02 | System for controlling speed fluctuation of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201877826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106987918A (en) * | 2017-04-24 | 2017-07-28 | 厦门象屿兴泓特种材料有限公司 | A kind of composite spinning measures apparatus for controlling pump |
-
2010
- 2010-11-02 CN CN2010205931986U patent/CN201877826U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106987918A (en) * | 2017-04-24 | 2017-07-28 | 厦门象屿兴泓特种材料有限公司 | A kind of composite spinning measures apparatus for controlling pump |
| CN106987918B (en) * | 2017-04-24 | 2022-10-14 | 厦门象屿兴泓特种材料有限公司 | Composite spinning metering pump control device |
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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: 20110622 |
|
| CX01 | Expiry of patent term |