CN101867337A - Intelligent braking method for knitting machine - Google Patents
Intelligent braking method for knitting machine Download PDFInfo
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- CN101867337A CN101867337A CN201010121931A CN201010121931A CN101867337A CN 101867337 A CN101867337 A CN 101867337A CN 201010121931 A CN201010121931 A CN 201010121931A CN 201010121931 A CN201010121931 A CN 201010121931A CN 101867337 A CN101867337 A CN 101867337A
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- time
- brake
- frequency converter
- knitting machine
- motor
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- 238000009940 knitting Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000009467 reduction Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 230000008859 change Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000009945 crocheting Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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- Knitting Machines (AREA)
Abstract
The invention relates to the technical field of knitted products, in particular to an intelligent braking method for a knitting machine. The braking method comprises the following steps of: setting a dynamic braking time, namely presetting an optimized braking time parameter or an optimal braking time at different speeds; during braking, determining the set braking time in the parameter according to the current rotational speed of a motor; controlling the frequency reduction time of a frequency converter according to the determined braking time; and in the set time, reducing the frequency of the frequency converter to zero and reducing the voltage output to the motor to zero at the same time so that the motor stops rotating and the knitting machine realizes braking. When the knitting machine is braked, different braking time is selected according to different rotational speed sections. Short braking time is set at high speed, and high stop time can avoid enough yarn tails supplied to the knitting machine for knitting after the yarns are broken. Longer braking time is set at low speed, the machine is not easy to sway during halting, and accessories of the machine are not easily abraded.
Description
Technical field:
The present invention relates to the knitting machine product technical field, refer in particular to a kind of intelligent braking method of knitting machine.
Background technology:
Knitting machine (circle volume machine) is a kind of equipment of knitted or woven fabrics, its motor as power source is connected with frequency converter usually, by the voltage starting motor of frequency converter output, and the rotating speed of control motor, promptly frequency converter can be by changing the rotary speed that output frequency comes governor motor.When this frequency converter changes frequency usually, also need correspondent voltage, if only change frequency, motor may be burnt out.Particularly when frequency reduced, this problem was just very outstanding.In order to prevent the generation of burn-down of electric motor accident, frequency converter must change voltage simultaneously when changing frequency, for example: for the rotary speed that makes motor reduces 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 (claiming brake usually) that can be used as knitting machine.
At present, general knitting machine is before dispatching from the factory, and the brake time of frequency converter is changeless, and for example brake the time (braking time just, promptly motor is low to moderate for zero time by current speed drop) is t.There is certain deficiency in this mode that the brake time is fixing, because the inertia of knitting machine is different under the different rotating speeds, is t if the time of will braking all fixedly installs, and then just there is very big difference in the shutdown smoothness of knitting machine under the friction speed.For example, if the t setting is too small, then the brake time is short; in such cases, rock in the time of will causing machine down during the equipment low cruise greatly, machine rocks Da Yi and causes travelling gear and deep bid gear wear; cause gear to cooperate the interdigit crack excessive, the cloth cover after the braiding plays horizontal stripe easily.If t is provided with excessive, the time of promptly braking is oversize, is then running up down, and the excessive machine dwell time of inertia is long, when causing because of disorderly closedowns such as broken yarns, occurs remaining yarn easily and supplies with the knitting needle crocheting inadequately and knit, and causes falling cloth, goes out the occurrence point.This shows how brake time t is 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 that occurs in the present brake process in order to overcome, and a kind of intelligent braking method of knitting machine is provided.In this method, the brake time is not changeless, but sets the best brake time according to current equipment rotating speed intelligence, makes brake process level and smooth, stable.
For solving the problems of the technologies described above, the present invention has adopted following technical scheme: this brake method is to set up the dynamic brake time, promptly set in advance one and optimize the brake time parameter, the best brake time under the friction speed, during brake according to the rotating speed of current motor, by the brake time of determining in the parameter to set, according to the time of determined brake time control of conversion device frequency reduction, in setting-up time, the frequency of frequency converter is reduced to zero, the voltage that exports motor simultaneously to is reduced to zero, and motor stops operating, and knitting machine is realized brake.
Furthermore, brake method may further comprise the steps in the technique scheme: a, set in advance the deceleration time of motor under different rotating speeds that drives by frequency converter in the computer of knitting machine, as the brake parameter list; B, unlatching brake button, computer brake program start; C, computer detect the frequency converter numerical value of this moment, and are inquiring the deceleration time under this numerical value in advance in the stored parameter table; D, computer calculated in 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, the every interruption of timer once, the frequency converter output frequency reduces 1Hz, the voltage that exports motor to reduces by a unit, the rotating speed of motor reduces a unit; When the voltage that f, frequency converter export motor to was reduced to zero, frequency converter cut out, and motor shuts down, and knitting machine is realized the brake purpose.
Furthermore, in the technique scheme, also have one to detect step between the described step f, whether the voltage that promptly detects frequency converter output has been reduced to zero, if be reduced to zero, then frequency converter cuts out; If it is non-vanishing to detect the voltage of frequency converter output, then turn back to step e again, timer is constantly worked, and is reduced to zero until the output voltage of frequency converter.By this step guarantee to brake errorless.
After the present invention adopted technique scheme, its beneficial effect that has was: enable the shortcoming that this intelligent braking method can avoid in the present knitting machine fixing brake time method to be brought.In this method, during the knitting machine brake, can select the different brake time for use according to different speed stages.Set the short brake time during high speed, just can avoid down time the yarn uropodium behind the broken yarn enough to supply with the knitting needle crocheting soon and knit.Set the long brake time during low speed, just be not easy when machine stops to rock, the machine accessory is just not easy to wear.
In addition, this method also can keep present brake method, realizes different changes of killing the volume mode by a function switch key.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is the circuit working schematic diagram of knitting machine;
Fig. 2 is a control flow chart of the present invention.
Embodiment
See Fig. 1, this is the circuit working schematic diagram of knitting machine, and transformer is connected with the power supply in the external world, and outside three phase mains is used through supplying with knitting machine after the transformation.One power output end of transformer to the control board of transferring, is delivered to frequency converter with power delivery again, by frequency converter with power delivery to motor.The rotating speed of motor will pass through Frequency Converter Control.By the transmission mechanism in the motor drive knitting machine, realize the running of knitting machine.
The intelligent braking method that is adopted among the present invention is: set up the dynamic brake time, promptly set in advance one and optimize the brake time parameter, the best brake time under the friction speed, during brake according to the rotating speed of current motor, by the brake time of determining in the parameter to set, according to the time of determined brake time control of conversion device frequency reduction, in setting-up time, the frequency of frequency converter is reduced to zero, the voltage that exports motor simultaneously to is reduced to zero, motor stops operating, and knitting machine is realized brake.
In conjunction with Fig. 2, this brake method may further comprise the steps:
A, in the computer of knitting machine, set in advance the deceleration time of motor under different rotating speeds that drives by frequency converter, as the brake parameter list;
B, unlatching brake button, computer brake program start;
C, computer detect the frequency converter numerical value of this moment, and are inquiring the deceleration time under this numerical value in advance in the stored parameter table;
D, computer calculated in 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, the every interruption of timer once, the frequency converter output frequency reduces 1Hz, the voltage that exports motor to reduces by a unit, the rotating speed of motor reduces a unit;
Whether the voltage of e-1, the output of detection frequency converter has been reduced to zero, if be reduced to zero, then frequency converter cuts out; If it is non-vanishing to detect the voltage of frequency converter output, then turn back to step e again.
When the voltage that f, frequency converter export motor to was reduced to zero, frequency converter cut out, and motor shuts down, and knitting machine is realized the brake purpose.
Illustrate below:
Preliminary setting parameter table in the computer of knitting machine at first, it is as shown in the table:
| Current rotating speed (V) | ??V0-V1 | ??V1-V2 | ??V2-V3 | ??V3-V4 |
| The best brake time (T) | ??T1 | ??T2 | ??T3 | ??T4 |
When needs stop knitting machine, perhaps, at first read the rotating speed of motor this moment this moment because of knitting machine breaks down need stop the time, for example this moment motor rotating speed V be positioned at the V1-V2 velocity shooting, the brake time of its correspondence is T2.Computer will calculate at T2 in the time, and frequency converter is reduced in the zero process by current frequency, and how long every reduction 1Hz needs, and this time, Δ T was the timing of timer.Next, timer is started working, and the time of every interval delta T, timer interrupts once, and frequency converter reduces 1Hz, exports the voltage of motor to, also reduces a unit.Timer is constantly worked, and the frequency of frequency converter constantly reduces, and the voltage that exports motor to also constantly reduces, until being zero.When being reduced to zero, motor just quits work, and knitting machine is shut down, and has realized brake.
In this method, during the knitting machine brake, can select the different brake time for use according to different speed stages.Set the short brake time during high speed, just can avoid down time the yarn uropodium behind the broken yarn enough to supply with the knitting needle crocheting soon and knit.Set the long brake time during low speed, just be not easy when machine stops to rock, the machine accessory is just not easy to wear.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and is every according to any simple modification, equivalent variations and modification that the present invention did, all still belongs in the scope of technical solution of the present invention.
Claims (3)
1. the intelligent braking method of a knitting machine, it is characterized in that: this brake method is to set up the dynamic brake time, promptly set in advance one and optimize the brake time parameter, the best brake time under the friction speed, during brake according to the rotating speed of current motor, by the brake time of determining in the parameter to set, according to the time of determined brake time control of conversion device frequency reduction, in setting-up time, the frequency of frequency converter is reduced to zero, the voltage that exports motor simultaneously to is reduced to zero, and motor stops operating, and knitting machine is realized brake.
2. the intelligent braking method of a kind of knitting machine according to claim 1, it is characterized in that: this brake method may further comprise the steps:
A, in the computer of knitting machine, set in advance the deceleration time of motor under different rotating speeds that drives by frequency converter, as the brake parameter list;
B, unlatching brake button, computer brake program start;
C, computer detect the frequency converter numerical value of this moment, and are inquiring the deceleration time under this numerical value in advance in the stored parameter table;
D, computer calculated in 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, the every interruption of timer once, the frequency converter output frequency reduces 1Hz, the voltage that exports motor to reduces by a unit, the rotating speed of motor reduces a unit;
When the voltage that f, frequency converter export motor to was reduced to zero, frequency converter cut out, and motor shuts down, and knitting machine is realized the brake purpose.
3. the intelligent braking method of a kind of knitting machine according to claim 2 is characterized in that: also have one to detect step between the described step f, whether the voltage that promptly detects frequency converter output has been reduced to zero, if be reduced to zero, then frequency converter cuts out; If it is non-vanishing to detect the voltage of frequency converter output, then turn back to step e again, timer is constantly worked, and is reduced to zero until the output voltage of frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010121931.9A CN101867337B (en) | 2010-03-08 | 2010-03-08 | Intelligent braking method for knitting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010121931.9A CN101867337B (en) | 2010-03-08 | 2010-03-08 | Intelligent braking method for knitting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101867337A true CN101867337A (en) | 2010-10-20 |
| CN101867337B CN101867337B (en) | 2014-07-09 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010121931.9A Expired - Fee Related CN101867337B (en) | 2010-03-08 | 2010-03-08 | Intelligent braking method for knitting machine |
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| Country | Link |
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| CN (1) | CN101867337B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079212A (en) * | 2014-07-16 | 2014-10-01 | 刘健萍 | Intelligent braking method of circular knitting machine |
| CN107317521A (en) * | 2016-04-26 | 2017-11-03 | 戴森技术有限公司 | The method of controlled motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945832A1 (en) * | 1978-11-14 | 1980-05-29 | Ferodo Sa | METHOD AND DEVICE FOR REDUCING THE SPEED OF AN ASYNCHRONOUS MOTOR |
| CN85201232U (en) * | 1985-04-01 | 1986-04-09 | 谢琼环 | V-power saving apparatus |
| CN1447517A (en) * | 2002-03-27 | 2003-10-08 | 村田机械株式会社 | Fast stop for rotary body |
| CN1838522A (en) * | 2005-03-23 | 2006-09-27 | 台达电子工业股份有限公司 | The control method of the running state of the motor |
-
2010
- 2010-03-08 CN CN201010121931.9A patent/CN101867337B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945832A1 (en) * | 1978-11-14 | 1980-05-29 | Ferodo Sa | METHOD AND DEVICE FOR REDUCING THE SPEED OF AN ASYNCHRONOUS MOTOR |
| CN85201232U (en) * | 1985-04-01 | 1986-04-09 | 谢琼环 | V-power saving apparatus |
| CN1447517A (en) * | 2002-03-27 | 2003-10-08 | 村田机械株式会社 | Fast stop for rotary body |
| CN1838522A (en) * | 2005-03-23 | 2006-09-27 | 台达电子工业股份有限公司 | The control method of the running state of the motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079212A (en) * | 2014-07-16 | 2014-10-01 | 刘健萍 | Intelligent braking method of circular knitting machine |
| CN107317521A (en) * | 2016-04-26 | 2017-11-03 | 戴森技术有限公司 | The method of controlled motor |
| CN107317521B (en) * | 2016-04-26 | 2021-06-22 | 戴森技术有限公司 | Method for controlling an electric machine |
| US11296621B2 (en) | 2016-04-26 | 2022-04-05 | Dyson Technology Limited | Method for controlling an electric motor |
| US11682988B2 (en) | 2016-04-26 | 2023-06-20 | Dyson Technology Limited | Method for controlling an electric motor |
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| Publication number | Publication date |
|---|---|
| CN101867337B (en) | 2014-07-09 |
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