CN203080154U - Power-off protection device of speed frame and speed frame - Google Patents
Power-off protection device of speed frame and speed frame Download PDFInfo
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- CN203080154U CN203080154U CN 201320009030 CN201320009030U CN203080154U CN 203080154 U CN203080154 U CN 203080154U CN 201320009030 CN201320009030 CN 201320009030 CN 201320009030 U CN201320009030 U CN 201320009030U CN 203080154 U CN203080154 U CN 203080154U
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- speed frame
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Abstract
The utility model discloses a power-off protection device of a speed frame and the speed frame. The power-off protection device of the speed frame comprises an LCL filter and a driving front end, wherein the driving front end comprises a rectification unit and a processing unit. The LCL filter is connected with the driving front end. The driving front end is connected with four frequency converters through a direct current bus. The LCL filter is used for boosting a first alternating voltage transmitted from a power grid to a second alternating voltage and outputting the second alternating voltage to the driving front end. The driving front end is used for rectifying the second alternating voltage to a direct voltage through the rectification unit and outputting the direct voltage to the direct current bus. The processing unit is used for controlling power-on and power-off of the rectification unit. According to the power-off protection device of the speed frame, a voltage of the direct current bus can be boosted through the driving front end, the fact that during low-speed operation of the speed frame, when grid faults occur, controllable and synchronous stopping functions of the speed frame can be achieved is ensured, and the power-off protection device of the speed frame and the speed frame have the advantages that yarn can not be pulled to be broken, production losses are reduced, production efficiency is improved, and work strength of operators is lightened.
Description
Technical field
The utility model relates to a kind of Speed frames, particularly relates to a kind of power-off protection apparatus of Speed frames and comprises the Speed frames of power-off protection apparatus.
Background technology
Four frequency conversion Speed frames generally are made up of roller, flier, bobbin, rail, and in process control procedure, these four mechanisms must be according to certain proportionate relationship synchronous operation.Experimental test shows, these four mechanisms start from by parking from 1500 turn-ofves when weaving little yarn, and roller and rail stop very fast, and the time is about 350ms, and bobbin down time is 2.5s, and flier down time is 6.5s.Because the free parking time of these four mechanisms is inconsistent, when electrical network breaks down, can cause yarn all to be broken, and has a strong impact on production.
In actual applications, usually be flier as main frame, roller, bobbin, rail are followed main frame (the main frame flier is with certain rotational speed, and slave roller, bobbin, rail are the rotational speed of proportionate relationship with the rotating speed with the main frame flier) as the slave ratio; Roller, flier, bobbin, four frequency converters of rail (INV) common DC bus.When electrical network breaks down, the power-off protection function of active host flier, frequency converter can change into electric energy to the mechanical kinetic energy of motor, and DC bus-bar voltage is maintained certain voltage range, makes the whole Speed frames can controlled stop, guarantees that yarn is not broken.But usually can run into such situation in the practical operation, Speed frames when low cruise, the mechanical kinetic energy deficiency; the electric energy that the frequency converter self capacity stores is also not enough; if electrical network breaks down, power-off protection function can not guarantee the frequency converter controlled stop, and the situation that yarn is broken will take place.
The utility model content
The technical problems to be solved in the utility model is in order to overcome in the prior art when electrical network breaks down; power-off protection function can not guarantee the frequency converter controlled stop; the defective of the situation that the generation yarn is broken; a kind of power-off protection apparatus and Speed frames of Speed frames are provided; make Speed frames can realize the function of controlled synchronous parking, have the advantage that yarn can not be broken, reduce the production loss, enhance productivity and alleviate operator's working strength.
The utility model solves above-mentioned technical problem by following technical proposals:
The utility model provides a kind of power-off protection apparatus of Speed frames, its characteristics are, this power-off protection apparatus comprises a LCL wave filter (inductance capacitance inductance filter) and an active front end, this active front end comprises a rectification unit and a processing unit, this LCL wave filter is connected with this active front end, and this active front end is connected with four frequency converters by a direct current bus;
This LCL wave filter is used for one first alternating voltage that transmission comes to electrical network and boosts to one second alternating voltage, and exports this second alternating voltage to this active front end;
It is a direct current voltage with this second ac voltage rectifier that this active front end is used for by this rectification unit, and exports this DC voltage to this dc bus;
This processing unit is used to control the break-make of this rectification unit.
Preferably, this rectification unit comprises six IGBT(insulated gate bipolar transistors).IGBT is by the BJT(double pole triode) and the MOS(insulating gate type field effect tube) the compound full-control type voltage driven type power semiconductor formed, have the MOSFET(metal-oxide half field effect transistor concurrently) high input impedance and GTR(power transistor) the advantage of low conduction voltage drop two aspects.The GTR saturation pressure reduces, and current carrying density is big, but drive current is bigger.The MOSFET driving power is very little, and switching speed is fast, but conduction voltage drop is big, and current carrying density is little.IGBT combines the advantage of above two kinds of devices, and the little and saturation pressure of driving power reduces.Be fit to very much to be applied to DC voltage and be fields such as 600V and above converter system such as alternating current generator, frequency converter, Switching Power Supply, lighting circuit, traction transmission.
Preferably, this processing unit is used to control the break-make of those IGBT.
Preferably, this active front end is the active front end of 540V-800V for this DC voltage.
Preferably, this active front end is the active front end of 640V or 680V for this DC voltage.Wherein, this active front end has rectification and feedback function.When the Speed frames Brake stop, the kinetic energy of motor is converted into electric energy by frequency converter, and the voltage of this dc bus is raise, and at this moment this active front end can feed back to electrical network to electric energy, plays energy-conservation effect; This active front end is this DC voltage with this second alternating voltage that this LCL wave filter transmission comes by this rectification unit rectification again, the voltage range of this DC voltage is 540V-800V, technological requirement according to practical operation, promptly in order to guarantee that if electric network fault takes place when the low cruise Speed frames, can make Speed frames realize the function of controlled synchronous parking, the preferred voltage of this DC voltage is 640V or 680V.This active front end will be exported this DC voltage to this dc bus, make that the capacitance voltage on the frequency converter all is improved.When the Speed frames low cruise, if electrical network breaks down, Speed frames will activate power-off protection apparatus, make Speed frames have enough energy to make its controlled stop.
Preferably, four frequency converter, the frequency converter of flier, the frequency converter of copper pipe and frequency converters of rail that frequency converter is a roller.
The utility model also provides a kind of Speed frames that comprise above-mentioned power-off protection apparatus.
Positive progressive effect of the present utility model is:
The utility model provides a kind of power-off protection apparatus and Speed frames of Speed frames; can the raise voltage of dc bus of active front end in the power-off protection apparatus; make the electric capacity of frequency converter store more electric energy; and frequency converter can be converted into electric energy with the kinetic energy of motor; if guarantee that electric network fault takes place Speed frames when low cruise; can make Speed frames realize the function of controlled synchronous parking, have the advantage that yarn can not be broken, reduce the production loss, enhance productivity and alleviate operator's working strength.
Description of drawings
Fig. 1 is the control schematic diagram of the Speed frames of the utility model preferred embodiment.
The specific embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
With reference to shown in Figure 1; present embodiment provides a kind of Speed frames; these Speed frames comprise a power-off protection apparatus 1; this power-off protection apparatus 1 comprises a LCL wave filter 11 and an active front end 12; this active front end 12 comprises a rectification unit and a processing unit; this rectification unit comprises six IGBT; this LCL wave filter 11 is connected with this active front end 12, and this active front end 12 is connected with the frequency converter 21 of flier, the frequency converter 22 of roller, the frequency converter 23 of rail and the frequency converter 24 of copper pipe by a direct current bus.
This LCL wave filter 11 is used for the one first alternating voltage 380V that transmission comes to electrical network and boosts to one second alternating voltage, and exports this second alternating voltage to this active front end 12;
It is a direct current voltage with this second ac voltage rectifier that this active front end 12 is used for by this rectification unit, and exports this DC voltage to this dc bus;
This processing unit is used to control the break-make of those IGBT.
Wherein, the voltage span of this DC voltage of these active front end 12 outputs can be 540V-800V, in order to guarantee that if electric network fault takes place when the low cruise Speed frames, can make Speed frames realize the function of controlled synchronous parking, the voltage value of this DC voltage should be relative bigger, so preferably this DC voltage is 640V or 680V.
The 380V alternating voltage that 11 pairs of this electrical network transmission of this LCL wave filter come carries out filtering, and exports filtered alternating voltage to those IGBT.The break-make of those IGBT is by this processing unit control.According to formula U=L*(di/dt), U in this formula represents the voltage value through this alternating voltage of output after this LCL wave filter 11, L in this formula represents the inductance value of the inductance in this LCL wave filter 11, i represents the current value by IGBT, t represents the make-and-break time of IGBT when electric current flows through, and this make-and-break time is by this processing unit control.According to this formula as can be known, because inductance L is constant, therefore change the value of (di/dt) by the break-make that changes those IGBT, and then control the voltage value of this alternating voltage U, the 380V alternating voltage that makes this electrical network transmission raises through voltage after this LCL wave filter 11 and is this second alternating voltage, and promptly in fact this LCL wave filter 11 has played a boosted voltage.
This LCL wave filter 11 exports this second alternating voltage to this active front end 12, and this active front end 12 has rectification and feedback function.When the Speed frames Brake stop, this active front end 12 is this DC voltage with this second alternating voltage that these LCL wave filter 11 transmission come by this rectification unit rectification.The kinetic energy of motor is converted into electric energy by frequency converter again, and the voltage of this dc bus is raise, and at this moment this active front end 12 can feed back to electrical network to electric energy, plays energy-conservation effect.The rectification of this active front end 12 and feedback function make that when the Speed frames low cruise, if electrical network breaks down, Speed frames will activate power-off protection apparatus, make Speed frames have enough energy to make its controlled stop.
When the Speed frames low cruise; at this moment if electrical network breaks down; Speed frames will activate power-off protection apparatus; this first alternating voltage 380V that 11 pairs of electrical network transmission of this LCL wave filter come boosts to this second alternating voltage; and export this second alternating voltage to this active front end 12; this active front end 12 is this DC voltage by this rectification unit with this second ac voltage rectifier; and exporting this DC voltage to this dc bus, this DC voltage on this dc bus is supplied with the frequency converter 21 of flier; the frequency converter 22 of roller; the frequency converter 23 of rail and the frequency converter 24 of copper pipe.
Though more than described the specific embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is limited by appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection domain of the present utility model.
Claims (7)
1. the power-off protection apparatus of Speed frames, it is characterized in that, this power-off protection apparatus comprises a LCL wave filter and an active front end, this active front end comprises a rectification unit and a processing unit, this LCL wave filter is connected with this active front end, and this active front end is connected with four frequency converters by a direct current bus;
This LCL wave filter is used for one first alternating voltage that transmission comes to electrical network and boosts to one second alternating voltage, and exports this second alternating voltage to this active front end;
It is a direct current voltage with this second ac voltage rectifier that this active front end is used for by this rectification unit, and exports this DC voltage to this dc bus;
This processing unit is used to control the break-make of this rectification unit.
2. power-off protection apparatus as claimed in claim 1 is characterized in that, this rectification unit comprises six IGBT.
3. power-off protection apparatus as claimed in claim 2 is characterized in that this processing unit is used to control the break-make of those IGBT.
4. power-off protection apparatus as claimed in claim 1 is characterized in that, this active front end is the active front end of 540V-800V for this DC voltage.
5. power-off protection apparatus as claimed in claim 4 is characterized in that, this active front end is the active front end of 640V or 680V for this DC voltage.
6. power-off protection apparatus as claimed in claim 1 is characterized in that, four frequency converter, the frequency converter of flier, the frequency converter of copper pipe and frequency converters of rail that frequency converter is a roller.
7. one kind comprises the Speed frames as any described power-off protection apparatus among the claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320009030 CN203080154U (en) | 2013-01-08 | 2013-01-08 | Power-off protection device of speed frame and speed frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320009030 CN203080154U (en) | 2013-01-08 | 2013-01-08 | Power-off protection device of speed frame and speed frame |
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| Publication Number | Publication Date |
|---|---|
| CN203080154U true CN203080154U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320009030 Expired - Fee Related CN203080154U (en) | 2013-01-08 | 2013-01-08 | Power-off protection device of speed frame and speed frame |
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| CN (1) | CN203080154U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696123A (en) * | 2016-04-25 | 2016-06-22 | 深圳市英威腾电气股份有限公司 | Roving frame power-off synchronous parking control method and device |
| 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 |
-
2013
- 2013-01-08 CN CN 201320009030 patent/CN203080154U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105696123A (en) * | 2016-04-25 | 2016-06-22 | 深圳市英威腾电气股份有限公司 | Roving frame power-off synchronous parking control method and device |
| CN105696123B (en) * | 2016-04-25 | 2018-04-20 | 深圳市英威腾电气股份有限公司 | A kind of power cut-off of rover synchronization control method for stopping and device |
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| 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: 20130724 Termination date: 20150108 |
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| EXPY | Termination of patent right or utility model |