CN102394564A - Method for raising dandy roll speed stability - Google Patents
Method for raising dandy roll speed stability Download PDFInfo
- Publication number
- CN102394564A CN102394564A CN2011103362299A CN201110336229A CN102394564A CN 102394564 A CN102394564 A CN 102394564A CN 2011103362299 A CN2011103362299 A CN 2011103362299A CN 201110336229 A CN201110336229 A CN 201110336229A CN 102394564 A CN102394564 A CN 102394564A
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- speed
- signal
- voltage signal
- dandyprat
- dandy roll
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Abstract
The invention discloses a method for raising dandy roll speed stability. The method is characterized by comprising the following steps: (1) acquiring a direct current voltage signal from an armature voltage loop of a main drive motor; (2) the voltage signal is sent to an input loop of an isolation converter, through the isolation converter, the input voltage signal is converted into a standard 4-20 mA output current signal, the standard 4-20 mA output current signal is taken as a given signal of speed adjustment and is directly sent to a dandy roll frequency converter, thus a dandy roll speed and a paper machine speed maintain consistent. According to the invention, the voltage signal of a direct current motor is directly converted and is used for a speed signal of a dandy roll variable frequency motor, economic benefit is created, a process flow is simple, equipment investment is small, and security is ensured.
Description
Technical field
The present invention relates to a kind of dandyprat speed Tracking technology; Belong to electric drive control field; The main paper motor speeds of following the tracks of obtains the speed feedback d. c. voltage signal through the tachogenerator of main transmission direct current machine, is used for the speed control of dandyprat frequency converter through conversion.
Background technology
Paper-making industry be one with national economy and the closely bound up industry of Social Culture industry; In one of developed country's national economy ten big pillar industries; And China's paper industry is being faced with the great demand that culture, information, industry develop rapidly and consumption structure upgrading are brought at present; Industry development steps into the quick rise period, and the paper industry has also become a popular industry of China's economic development.Control requires also increasingly high paper industry to electric drive.For the dehydration property that improves paper and the paper-forming evenness of paper.Each board is at the newly-increased dandyprat device of wet end.Traditional dandyprat is controlled to be: obtain rate signal from the tachogenerator of main driving motor, flow to the dandyprat variable-frequency motor and carry out speed control.There is following shortcoming in tachogenerator in the actual moving process: 1, tachogenerator vibration causing greatly dandyprat velocity perturbation.2, the flexible link that links to each other with line shaft of tachogenerator often fracture break down.3, the signal processing control board fluctuation of service of speed causes that speed is unstable.To the paper machine of a 30T/D, every day is because the calculating in 1 hour of the speed influence time of dandyprat.Annual more than 100 ten thousand yuan of the profits that reduce.Enterprise will obtain sustainable development, generates profit maximization, and just the stability to transmission control has proposed requirements at the higher level, and the stability that improves transmission control not only conforms with the business economic interests, also can produce the big social benefit of tool.
Summary of the invention
The object of the present invention is to provide a kind of method that can improve the dandyprat speed stability greatly.
Technical scheme of the present invention is following: a kind of method that improves the dandyprat speed stability is characterized in that: comprise the steps: that (1) obtain d. c. voltage signal from the armature voltage loop of main driving motor; (2) voltage signal is delivered to the input circuit of isolating converter; Convert the voltage signal of importing to standard 4～20mA output current signal through isolated converter; With given directly the deliver to dandyprat frequency converter of output current signal, dandyprat speed and paper motor speeds are consistent again as speed regulation.
Said main driving motor is a direct current machine, and voltage range is 0～440V.DC transmission device is adopted in transmission, realizes the constant-torque stepless speed-regulating of motor through changing armature voltage.
The present invention with voltage signal through isolation change the output current signal of 4～20mA adjustable size; Output current signal is delivered to the dandyprat frequency converter as rate signal again; Parameter through the dandyprat frequency converter is provided with adjustment then, thereby can adjust the dandyprat actual speed, the dandyprat display speed is consistent with main driving motor speed.The transmission cable of the output current signal among the present invention adopts signal shielding cable; The positive and negative polarity of output current signal does not connect instead; The electric pressure converter installation site is vibrations not, ambient temperature-10 ℃～+ 40 ℃.
The present invention directly changes the voltage signal of direct current machine, is used for the rate signal of dandyprat variable-frequency motor, can create economic benefit, and technological process simultaneously is simple, and equipment investment is few, and safety is secure.
Description of drawings
Fig. 1 is a control flow chart of the present invention.
Embodiment
Instance and accompanying drawing that following basis is concrete are further described the present invention:
Instance 1:
Can know from Fig. 1; The d. c. voltage signal that the present invention utilizes DC transmission device 1 to convert the 380V ac voltage signal of input to 0～440V drives DC Transmission motor 4 and carries out stepless speed regulation; D. c. voltage signal with 0～440V flows to isolation and switching device 2 simultaneously; Isolation and switching device 2 converts d. c. voltage signal the output current signal of 4～20mA to, gives dandyprat frequency converter 3 with the output current signal of 4～20mA as the velocity setting signal, is used for the speed of dandyprat frequency converter according to paper motor speeds control dandyprat variable-frequency motor 5; Adjust the parameter of dandyprat frequency converter simultaneously; Actual speed according to on-the-spot paper machine and dandyprat is poor, and the fine adjustment speed compensating proportion is provided with, and the dandyprat display speed is got final product with main driving motor speed is consistent.
Claims (2)
1. method that improves the dandyprat speed stability is characterized in that: comprise the steps: that (1) obtain d. c. voltage signal from the armature voltage loop of main driving motor; (2) voltage signal is delivered to the input circuit of isolating converter; Convert the voltage signal of importing to standard 4～20mA output current signal through isolated converter; With given directly the deliver to dandyprat frequency converter of output current signal, dandyprat speed and paper motor speeds are consistent again as speed regulation.
2. method according to claim 1 is characterized in that: said main driving motor is a direct current machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103362299A CN102394564A (en) | 2011-10-31 | 2011-10-31 | Method for raising dandy roll speed stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103362299A CN102394564A (en) | 2011-10-31 | 2011-10-31 | Method for raising dandy roll speed stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102394564A true CN102394564A (en) | 2012-03-28 |
Family
ID=45861780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103362299A Pending CN102394564A (en) | 2011-10-31 | 2011-10-31 | Method for raising dandy roll speed stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102394564A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862512A (en) * | 2016-05-30 | 2016-08-17 | 许昌中亚工业智能装备股份有限公司 | Speed adjusting and stabilizing device for papermaking |
| CN109000962A (en) * | 2018-08-08 | 2018-12-14 | 岳阳林纸股份有限公司 | A kind of wood chip Dynamic sampling machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61288799A (en) * | 1985-06-13 | 1986-12-18 | Toshiba Corp | Controller for plural motors |
| JPS63228994A (en) * | 1987-03-16 | 1988-09-22 | Toshiba Corp | Motor controller |
| JPH0247070A (en) * | 1988-08-09 | 1990-02-16 | Fuji Photo Film Co Ltd | Optical beam scanner |
| JPH0363783A (en) * | 1989-07-31 | 1991-03-19 | Mitsubishi Plastics Ind Ltd | Ic memory card |
| CN101499762A (en) * | 2008-01-31 | 2009-08-05 | 株式会社日立制作所 | Electric motor drive system and electric motor control method |
-
2011
- 2011-10-31 CN CN2011103362299A patent/CN102394564A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61288799A (en) * | 1985-06-13 | 1986-12-18 | Toshiba Corp | Controller for plural motors |
| JPS63228994A (en) * | 1987-03-16 | 1988-09-22 | Toshiba Corp | Motor controller |
| JPH0247070A (en) * | 1988-08-09 | 1990-02-16 | Fuji Photo Film Co Ltd | Optical beam scanner |
| JPH0363783A (en) * | 1989-07-31 | 1991-03-19 | Mitsubishi Plastics Ind Ltd | Ic memory card |
| CN101499762A (en) * | 2008-01-31 | 2009-08-05 | 株式会社日立制作所 | Electric motor drive system and electric motor control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862512A (en) * | 2016-05-30 | 2016-08-17 | 许昌中亚工业智能装备股份有限公司 | Speed adjusting and stabilizing device for papermaking |
| CN109000962A (en) * | 2018-08-08 | 2018-12-14 | 岳阳林纸股份有限公司 | A kind of wood chip Dynamic sampling machine |
| CN109000962B (en) * | 2018-08-08 | 2020-09-11 | 岳阳林纸股份有限公司 | Wood chip dynamic sampler |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120328 |