CN104079212A - Intelligent braking method of circular knitting machine - Google Patents
Intelligent braking method of circular knitting machine Download PDFInfo
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- CN104079212A CN104079212A CN201410338363.6A CN201410338363A CN104079212A CN 104079212 A CN104079212 A CN 104079212A CN 201410338363 A CN201410338363 A CN 201410338363A CN 104079212 A CN104079212 A CN 104079212A
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- frequency converter
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Abstract
The invention relates to the technical field of knit products, in particular to an intelligent braking method of a circular knitting machine. The intelligent braking method includes the steps that dynamic braking time is set, namely a braking time optimizing parameter and the optimal braking time at different speeds are set in advance, when braking is carried out, the set braking time is determined from the parameter according the rotating speed of a motor at present, the time for reducing the frequency of a frequency converter is controlled according to the determined braking time, in the setting time, the frequency of the frequency converter is reduced to be zero, voltage output to the motor is reduced to be zero at the same time, the motor stops rotating, and the circular knitting machine is braked. When the circular knitting machine is braked, different periods of braking time can be selected according to different rotating speed sections. The short braking time is set when the speed is high, and yarn tails left after yarns are broken can be prevented from being sufficiently supplied to a knitting needle hook for knitting due to the short braking time. The long braking time is set when the speed is low, the machine is not prone to shaking when being stopped, and parts of the machine are not prone to being abraded.
Description
Technical field
The present invention relates to knit product technical field, refer in particular to a kind of intelligent brake method of justifying volume machine.
Background technology
Circle volume machine is a kind of equipment of knitted or woven fabrics, and its motor as power source is connected with frequency converter conventionally, the voltage starting motor of exporting by frequency converter, and control the rotating speed of motor, frequency converter can carry out by change output frequency the rotary speed of governor motor.When this frequency converter changes frequency conventionally, also need corresponding voltage, if only change frequency, motor may be burned.Particularly, when frequency reduces, this problem is just very outstanding.In order to prevent the generation of burn-down of electric motor accident, frequency converter must change voltage when changing frequency simultaneously, for example: for the rotary speed of motor is reduced by half, the output frequency of frequency converter must change to 30Hz from 60Hz, and at this moment the output voltage of frequency converter just must change to about 100V from 200V.As seen from the above, frequency converter is the braking equipment that can be used as knitting machine.
At present, general round volume machine is before dispatching from the factory, and the braking time of frequency converter is changeless, and for example braking time (braking time namely, motor is reduced to for zero time by current rotating speed) is t.This fixing mode of braking time is existed to certain deficiency, because the inertia of knitting machine under different rotating speeds is different, if braking time is all fixedly installed as t, under friction speed just there is very large difference in the shutdown smoothness of circle volume machine.For example, if t setting is too small, braking time is short; in such cases, in the time of will causing machine down during equipment low cruise, rock greatly, machine rocks great Yi and causes travelling gear and big disc gear wearing and tearing; cause gear to coordinate position excesssive gap, the cloth cover after braiding easily plays horizontal stripe.If t arranges excessive, braking time is oversize, and under running up, the excessive machine dwell time of inertia is long, while causing because of disorderly closedowns such as broken yarns, easily occurs that remaining yarn supplies with not knitting needle crocheting and knit, and causes falling cloth, goes out occurrence point.As can be seen here, how braking time t being set is the key that overcomes the problems referred to above.
Summary of the invention
Technical problem to be solved by this invention is exactly the deficiency occurring in current braking procedure in order to overcome, and a kind of intelligent braking method of justifying volume machine is provided.In the method, braking time is not changeless, but sets best braking time according to current equipment rotating speed intelligence, makes braking procedure level and smooth, stable.
For solving the problems of the technologies described above, the present invention has adopted following technical scheme: this braking method is to set up dynamic braking time, set in advance one and optimize braking time parameter, best braking time under friction speed, during braking according to the rotating speed of current motor, in parameter, determine the braking time setting, according to determined braking time, control the time that frequency converter frequency reduces, in setting-up time, the frequency of frequency converter is reduced to zero, the lower voltage that simultaneously exports motor to is zero, and motor stops operating, and circle volume machine is realized braking.
Furthermore, in technique scheme, braking method comprises the following steps: a, in the computer of circle volume machine, set in advance motor by transducer drive deceleration time under different rotating speeds, as brake parameters table; B, unlatching braking button, brake computer program starts; C, computer detection frequency converter numerical value now, and according to the rotating speed of current motor, in pre-stored parameter list, inquire this motor rotary speed corresponding deceleration time; D, computer calculated within above-mentioned deceleration time, the timing numerical value of the every reduction of frequency converter frequency 1Hz, and opening timing device; E, timer are started working, and once, frequency converter output frequency reduces 1Hz to the every interruption of timer, and the voltage that exports motor to reduces Yi Ge unit, and the rotating speed of motor reduces Yi Ge unit; When the lower voltage that f, frequency converter export motor to is zero, frequency converter cuts out, and motor shuts down, and circle volume machine is realized braking object.
Furthermore, in technique scheme, also have a detecting step before described step f, whether the voltage that detects frequency converter output has been reduced to zero, if be reduced to zero, frequency converter cuts out; If it is non-vanishing the voltage of frequency converter output to be detected, return to step e, timer is constantly worked, until the output voltage of frequency converter is reduced to zero.By this step, guarantee the errorless of brake.
The present invention adopts after technique scheme, and its beneficial effect having is: enable this intelligent brake method and can avoid justifying at present the shortcoming that in volume machine, fixedly braking time method is brought.In this method, when circle is compiled machine-processed moving, can select different braking times according to different speed stages.During high speed, set short braking time, just can avoid soon down time the yarn uropodium after broken yarn enough to supply with knitting needle crocheting and knit.During low speed, set longer braking time, be just not easy to rock when machine stops, machine parts is just not easy to wear.
In addition, this method also can retain current braking method, realizes the change of different braking mode by a function switch key.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is the circuit working schematic diagram of circle volume machine;
Fig. 2 is control flow chart of the present invention.
Embodiment
See Fig. 1, this is the circuit working schematic diagram of circle volume machine, and transformer is connected with extraneous power supply, and outside three phase mains is supplied with after transformation to circle volume machine and used.One power output end of transformer to transferring after control board, then is delivered to frequency converter by power delivery, by frequency converter by power delivery to motor.The rotating speed of motor will pass through Frequency Converter Control.By motor driving, justify the transmission mechanism in volume machine, realize the running of circle volume machine.
The intelligent brake method adopting in the present invention is: set up dynamic braking time, set in advance one and optimize braking time parameter, best braking time under friction speed, during braking according to the rotating speed of current motor, in parameter, determine the braking time setting, according to determined braking time, control the time that frequency converter frequency reduces, in setting-up time, the frequency of frequency converter is reduced to zero, the lower voltage that simultaneously exports motor to is zero, motor stops operating, and knitting machine is realized braking.
In conjunction with Fig. 2, this braking method comprises the following steps:
A, in the computer of circle volume machine, set in advance motor by transducer drive deceleration time under different rotating speeds, as brake parameters table.
B, unlatching braking button, brake computer program starts.
C, computer detection frequency converter numerical value now, and according to the rotating speed of current motor, in pre-stored parameter list, inquire this motor rotary speed corresponding deceleration time.
D, computer calculated within above-mentioned deceleration time, the timing numerical value of the every reduction of frequency converter frequency 1Hz, and opening timing device.
E, timer are started working, and once, frequency converter output frequency reduces 1Hz to the every interruption of timer, and the voltage that exports motor to reduces Yi Ge unit, and the rotating speed of motor reduces Yi Ge unit.
Whether the voltage of e-1, the output of detection frequency converter has been reduced to zero, if be reduced to zero, frequency converter cuts out; If it is non-vanishing the voltage of frequency converter output to be detected, return to step e.
When the lower voltage that f, frequency converter export motor to is zero, frequency converter cuts out, and motor shuts down, and circle volume machine is realized braking object.
When needs stop circle volume machine, or because circle volume machine breaks down need to stop time, now first read the now rotating speed of motor, for example now the rotating speed V of motor is positioned at V1 – V2 velocity shooting, and its corresponding braking time is T2.Computer will calculate at T2 in the time, and in the process that frequency converter is reduced to zero by current frequency, how long every reduction 1Hz needs, the timing that this Shi Jian ⊿ T is timer.Next, timer is started working, and every every the time of ⊿ T, timer interrupts once, and frequency converter reduces 1Hz, exports the voltage of motor to, also reduces Yi Ge unit.Timer is constantly worked, and the frequency of frequency converter constantly reduces, and the voltage that exports motor to also constantly reduces, until be zero.When being reduced to zero, motor just quits work, and circle volume machine is shut down, and has realized braking.
In this method, when circle is compiled machine-processed moving, can select different braking times according to different speed stages.During high speed, set short braking time, just can avoid soon down time the yarn uropodium after broken yarn enough to supply with knitting needle crocheting and knit.During low speed, set longer braking time, be just not easy to rock when machine stops, machine parts is just not easy to wear.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and every any simple modification, equivalent variations and modification of doing according to the present invention, all still belongs in the scope of technical solution of the present invention.
Claims (1)
1. an intelligent brake method of justifying volume machine, is characterized in that: this braking method comprises the following steps: a, in the computer of circle volume machine, set in advance motor by transducer drive deceleration time under different rotating speeds, as brake parameters table; B, unlatching braking button, brake computer program starts; C, computer detection frequency converter numerical value now, and in pre-stored parameter list, inquire the deceleration time under this numerical value; D, computer calculated within above-mentioned deceleration time, the timing numerical value of the every reduction of frequency converter frequency 1Hz, and opening timing device; E, timer are started working, and once, frequency converter output frequency reduces 1Hz to the every interruption of timer, and the voltage that exports motor to reduces Yi Ge unit, and the rotating speed of motor reduces Yi Ge unit; Whether the voltage of e-1, the output of detection frequency converter has been reduced to zero, if be reduced to zero, frequency converter cuts out; If it is non-vanishing the output voltage of frequency converter to be detected, return to step e; When the lower voltage that f, frequency converter export motor to is zero, frequency converter cuts out, and motor shuts down, and circle volume machine is realized braking object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338363.6A CN104079212A (en) | 2014-07-16 | 2014-07-16 | Intelligent braking method of circular knitting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338363.6A CN104079212A (en) | 2014-07-16 | 2014-07-16 | Intelligent braking method of circular knitting machine |
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| CN104079212A true CN104079212A (en) | 2014-10-01 |
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| CN201410338363.6A Pending CN104079212A (en) | 2014-07-16 | 2014-07-16 | Intelligent braking method of circular knitting machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769668A (en) * | 2017-09-27 | 2018-03-06 | 安徽四创电子股份有限公司 | A kind of control system and its control method of the servo-drive of high speed turntable |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867337A (en) * | 2010-03-08 | 2010-10-20 | 韦增机械(佛山高明)有限公司 | Intelligent braking method for knitting machine |
| TW201132820A (en) * | 2010-03-25 | 2011-10-01 | rong-hao Hong | Braking method of knitting machine |
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2014
- 2014-07-16 CN CN201410338363.6A patent/CN104079212A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867337A (en) * | 2010-03-08 | 2010-10-20 | 韦增机械(佛山高明)有限公司 | Intelligent braking method for knitting machine |
| TW201132820A (en) * | 2010-03-25 | 2011-10-01 | rong-hao Hong | Braking method of knitting machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769668A (en) * | 2017-09-27 | 2018-03-06 | 安徽四创电子股份有限公司 | A kind of control system and its control method of the servo-drive of high speed turntable |
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Application publication date: 20141001 |