CN101834556A - Quick shutdown system and method of industrial sewing machine - Google Patents
Quick shutdown system and method of industrial sewing machine Download PDFInfo
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- CN101834556A CN101834556A CN 201010127217 CN201010127217A CN101834556A CN 101834556 A CN101834556 A CN 101834556A CN 201010127217 CN201010127217 CN 201010127217 CN 201010127217 A CN201010127217 A CN 201010127217A CN 101834556 A CN101834556 A CN 101834556A
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Abstract
The invention relates to a quick shutdown system and method of an industrial sewing machine. The system comprises a central processing unit, a bridge rectifier circuit composed of six switching tubes and a DC brushless electric machine used for controlling the operation of the industrial sewing machine, wherein the input end of the bridge rectifier circuit is connected with a system power supply; the triple outputs of the bridge rectifier circuit are connected with the three-phase winding of the DC brushless electric machine in turn; the control ends of the switching tubes are separately connected with the six-way PWM control signals of the central processing unit; an optical-electricity encoder and a position sensor which are arranged on the DC brushless electric machine and the pin signal and pedal signal of the industrial sewing machine are separately connected with the central processing unit; and the central processing unit continuously collects the motor speed, calculates the PWM duty ratio of six-way drive waveform and controls the on/off state of the three switching tubes of the middle and lower bridge arms of the bridge rectifier circuit, thus realizing quick shutdown. By using the system of the invention, the shutdown time of the industrial sewing machine can be greatly shortened, the production efficiency can be increased, the shutdown process is stable without causing motor vibration, and the reliability is good.
Description
Technical field
The present invention relates to a kind of industrial sewing machine, relate in particular to a kind of industrial sewing machine quick shutdown system and method thereof that improves the parking stationarity, shortens down time.
Background technology
At present, industrial sewing machine computer flatcar adopts dc brushless motor mostly, the general circuit that adopts as shown in Figure 1 of the drive part main circuit of dc brushless motor, among Fig. 1, T1～T6 is a switching tube, and D1～D6 is a fast recovery diode, RA, RB, RC are the every phase internal resistance of motor, LA, LB, LC are the every phase inductance of motor, and Ud is the DC bus-bar voltage that power supply is supplied with, and EA, EB, EC are the motor windings back-emf.Because the dc brushless motor good speed adjustment features need not be safeguarded, therefore be widely used.At present; domestic most of flat seam machine is stopped, and what adopt is earlier speed to be dropped to of hope than the slow-speed of revolution; the reduction of speed process adopts free parking or reduces the phase winding voltage method; 3 switch transistor T 4 of brachium pontis, T6, T2 open simultaneously and carry out the dynamic braking shutdown under adopting then, though this method can satisfy sewing machine parking requirement substantially, down time is longer; influence production efficiency; and motor can be shaken when stopping, and docking process is steady inadequately, and reliability and fail safe are not ideal enough.
Summary of the invention
It is longer down time that the present invention mainly solves original industrial sewing machine, influences production efficiency, and motor can be shaken when stopping, and docking process is steady inadequately, the dissatisfactory technical problem of reliability and fail safe; Provide a kind of industrial sewing machine that can make to stop fast, shorten downtime greatly, enhance productivity, and docking process is more steady, can not produce the motor jitter phenomenon, improve the industrial sewing machine quick shutdown system and the method thereof of reliability and fail safe.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: industrial sewing machine quick shutdown system of the present invention, comprise CPU, the dc brushless motor of motor master drive circuit and the running of control industrial sewing machine, described motor master drive circuit comprises the bridge heap circuit that six switch transistor T 1～T6 constitute, three switch transistor T 1, brachium pontis on T3 and the T5 formation, three switch transistor T 4, T6 and T2 constitute brachium pontis down, the input of described bridge heap circuit links to each other with system power supply, three tunnel outputs of bridge heap circuit respectively with the A phase winding of described dc brushless motor, the B phase winding, the C phase winding links to each other, the control end of described six switch transistor T 1～T6 links to each other with six road pwm control signals of described CPU respectively, described dc brushless motor is provided with photoelectric encoder and position transducer, described photoelectric encoder, the pin position signal of position transducer and industrial sewing machine, the pedal signal of industrial sewing machine links to each other with described CPU respectively.CPU is sent six road pwm control signals, gives the motor master drive circuit, and dc brushless motor running then drives machine spindle and sews.On the dc brushless motor axle photoelectric encoder is installed, is sent motor velocity signal on the one hand, send the motor rotor position signal by position transducer on the one hand, detect and control to CPU.The startup of industrial sewing machine and stopping signal are to be provided by the pedal that is installed on the sewing machine.Six switch transistor T 1～T6 are controlled by six road pwm control signals that CPU is sent.Industrial sewing machine runs up in the process, and when stopping signal was effective, CPU was adjusted the PWM dutyfactor value of drive waveforms according to the rotating speed that records, and promptly adjusts the output of six road pwm control signals.Under the different drive manners of industrial sewing machine, CPU is sent six road pwm control signals of different duty and is controlled, to reach fast, to stop reposefully.Pin position signal in addition that links to each other with industrial sewing machine and sewing machine tangent line, pipeline purging electromagnet.Pin position signal provides needle bar of sewing machine position accurately to CPU, CPU by control motor running, can guarantee needle bar of sewing machine as requested accurately the location, to satisfy user's needs.Sewing machine tangent line, pipeline purging electromagnetism iron rule are finished the operation of cutting off automatically and pushing the appropriate location automatically of line in the sewing process.
Industrial sewing machine rapid parking method of the present invention may further comprise the steps:
A. in described industrial sewing machine runs up process, when the stopping signal of the sewing machine that provides when the pedal signal of described industrial sewing machine is effective, described CPU is through the analysis and the processing of internal processes, export six road pwm control signals and give six switch transistor T 1～T6 of described motor master drive circuit respectively, turn-off six switch transistor T 1～T6 at once, CPU is gathered the rotating speed of described dc brushless motor by described photoelectric encoder and position transducer subsequently, according to the tachometer value that records, estimate the PWM dutyfactor value of drive waveforms, open down three switch transistor T 4 of brachium pontis again with this dutyfactor value, T6 and T2 give additional reaction square of described dc brushless motor;
B. described CPU is constantly measured the rotating speed of dc brushless motor, according to the PWM dutyfactor value of rotating speed adjustment drive waveforms, continues to increase the additional reaction square of dc brushless motor;
C. when the rotating speed of dc brushless motor drop to one than the slow-speed of revolution after, the pwm control signal of CPU output makes that three switch transistor T 4, T6 and T2 of described brachium pontis down are all open-minded, this moment, the PWM dutyfactor value of drive waveforms reached maximum, adopt dynamic braking, described dc brushless motor is shut down, industrial sewing machine is stopped fast.
Adopt said method, shortened the downtime of industrial sewing machine greatly, enhance productivity, the electric current that has also ensured dc brushless motor this moment has simultaneously been avoided directly shutting down at a high speed producing overcurrent in reasonable range, improves reliability and fail safe.
As preferably, described CPU adopts digital PI to regulate algorithm, and the PWM dutyfactor value of calculating drive waveforms control three switch transistor T 4, T6 and T2 open-minded of described time brachium pontis, and industrial sewing machine is steadily stopped; Described digital PI regulates algorithm:
Wherein, K is a sampling sequence number, and T is a sample frequency, deviation when e (k) is the k time sampling, and Ki is an integral constant, and Kp is a proportionality constant, and u (k) is the PWM dutyfactor value of 6 tunnel drive waveforms of the K time sampling instant CPU output.Numeral PI regulates algorithm, by calculating current direct current brushless motor speed, be converted into the PWM dutyfactor value of drive waveforms then, control down the ON time of brachium pontis switch transistor T 4, T6, T2, promptly regulate dc brushless motor braking moment size, reach the purpose that quick and stable is stopped.Use algorithm to regulate parking countertorque size, docking process just relatively steadily can not make dc brushless motor produce jitter phenomenon, the reliability and the fail safe that have improved system.
The invention has the beneficial effects as follows: CPU is adjusted the PWM dutyfactor value of 6 tunnel drive waveforms according to the rotating speed of industrial sewing machine dc brushless motor, thereby the opening state of three switching tubes of brachium pontis under in the control motor master drive circuit, promptly regulate dc brushless motor braking moment size, reach the purpose that quick and stable is stopped.The present invention shortens industrial sewing machine downtime greatly, enhance productivity, and docking process is more steady, can not produce the motor jitter phenomenon, improves system reliability and fail safe.
Description of drawings
Fig. 1 is a kind of circuit theory diagrams of the main drive circuit of industrial sewing machine dc brushless motor.
Fig. 2 is a kind of schematic block circuit diagram of industrial sewing machine quick shutdown system of the present invention.
Fig. 3 is a kind of flow chart of industrial sewing machine rapid parking method of the present invention.
1. CPU among the figure, 2. motor master drive circuit, 3. industrial sewing machine, 4. dc brushless motor, 5. system power supply, 6. photoelectric encoder, 7. position transducer, 8. pin position signal, 9. pedal signal, 10. sewing machine tangent line, pipeline purging electromagnet, 11. solenoid driver circuits.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: the industrial sewing machine quick shutdown system of present embodiment as shown in Figure 2, comprises the dc brushless motor 4 of CPU 1, motor master drive circuit 2 and 3 runnings of control industrial sewing machine.The motor master drives the bridge heap circuit that 2 circuit comprise that six switch transistor T 1～T6 constitute, as shown in Figure 1, three switch transistor T 1, brachium pontis on T3 and the T5 formation, three switch transistor T 4, T6 and T2 constitute brachium pontis down, what six switch transistor T 1～T6 selected for use in the present embodiment is field effect transistor, field effect transistor T1, the drain electrode of T3 and T5 also connects, field effect transistor T4, the source electrode of T6 and T2 also connects, the source electrode of the drain electrode of last brachium pontis and following brachium pontis constitutes the input of bridge heap circuit, the input of bridge heap circuit links to each other with system power supply 5, three tunnel outputs of bridge heap circuit respectively with the A phase winding of dc brushless motor 4, the B phase winding, the C phase winding links to each other, be specially: the source electrode of field effect transistor T1 links to each other with the drain electrode of T4 and links to each other with the A phase winding of dc brushless motor, the source electrode of field effect transistor T3 links to each other with the drain electrode of T6 and links to each other with the B phase winding of dc brushless motor, and the source electrode of field effect transistor T5 links to each other with the drain electrode of T2 and links to each other with the C phase winding of dc brushless motor.Among Fig. 1, RA, RB are the every internal resistance mutually of dc brushless motor with RC, and LA, LB and LC are the every phase inductance of dc brushless motor, and Ud is the DC bus-bar voltage that system power supply is supplied with, and EA, EB and EC are dc brushless motor winding back-emf.All be parallel with fast recovery diode between the source electrode of each field effect transistor and drain electrode, six fast recovery diodes are D1～D6, and the grid of six field effect transistor T1～T6 links to each other with six road pwm control signals of CPU 1 respectively.Photoelectric encoder 6 and position transducer 7 are installed on the dc brushless motor 4, and the pin position signal 8 of photoelectric encoder 6, position transducer 7 and industrial sewing machine, the pedal signal 9 of industrial sewing machine link to each other with CPU 1 respectively.CPU 1 also links to each other with solenoid driver circuit 11, and solenoid driver circuit 11 links to each other with sewing machine tangent line, pipeline purging electromagnet again.System power supply 5 is supplied with CPU 1 operating voltage simultaneously.
It is the tach signal of dc brushless motor that CPU obtains by photoelectric encoder and position transducer, and the pedal signal offers the CPU stopping signal.Six switch transistor T 1～T6 are controlled by six road pwm control signals that CPU is sent.Industrial sewing machine runs up in the process, and when stopping signal was effective, CPU was adjusted the PWM dutyfactor value of drive waveforms according to the rotating speed that records, and promptly adjusts the output of six road pwm control signals.Under the different drive manners of industrial sewing machine, CPU is sent six road pwm control signals of different duty and is controlled, to reach fast, to stop reposefully.Pin position signal in addition that links to each other with industrial sewing machine and sewing machine tangent line, pipeline purging electromagnet.Pin position signal provides needle bar of sewing machine position accurately to CPU, CPU by control motor running, can guarantee needle bar of sewing machine as requested accurately the location, to satisfy user's needs.Sewing machine tangent line, pipeline purging electromagnetism iron rule are finished the operation of cutting off automatically and pushing the appropriate location automatically of line in the sewing process.
The rapid parking method of above-mentioned industrial sewing machine quick shutdown system as shown in Figure 3, may further comprise the steps:
A. in industrial sewing machine 3 runs up process; when the stopping signal of the sewing machine that provides when the pedal signal 9 of industrial sewing machine 3 is effective; CPU 1 is through the analysis and the processing of internal processes; export six road pwm control signals respectively to six switch transistor T 1～T6 of motor master drive circuit 2; turn-off six switch transistor T 1～T6 at once; CPU 1 is gathered the rotating speed of dc brushless motor 4 by photoelectric encoder 6 and position transducer 7 subsequently; according to the tachometer value that records; adopt digital PI to regulate algorithm, digital PI regulates algorithm and is:
Wherein, K is a sampling sequence number, T is a sample frequency, deviation when e (k) is the k time sampling, Ki is an integral constant, and Kp is a proportionality constant, and u (k) is the PWM dutyfactor value of 6 tunnel drive waveforms of the K time sampling instant CPU 1 output, open down three switch transistor T 4, T6 and T2 of brachium pontis again with this dutyfactor value, give 4 one additional reaction squares of dc brushless motor;
C. when the rotating speed of dc brushless motor 4 drop to one than the slow-speed of revolution after, the pwm control signal of CPU 1 output makes that three switch transistor T 4, T6 and T2 of brachium pontis are all open-minded down, this moment, the PWM dutyfactor value of drive waveforms reached maximum, adopt dynamic braking, dc brushless motor 4 is shut down, industrial sewing machine 3 is stopped fast.
The present invention shortens industrial sewing machine downtime greatly, enhance productivity, and docking process is more steady, can not produce the motor jitter phenomenon, improves system reliability and fail safe.
Claims (3)
1. industrial sewing machine quick shutdown system, comprise CPU (1), the dc brushless motor (4) of motor master drive circuit (2) and control industrial sewing machine (3) running, described motor master drive circuit (2) comprises the bridge heap circuit that six switch transistor T 1～T6 constitute, three switch transistor T 1, brachium pontis on T3 and the T5 formation, three switch transistor T 4, T6 and T2 constitute brachium pontis down, the input of described bridge heap circuit links to each other with system power supply (5), three tunnel outputs of bridge heap circuit respectively with the A phase winding of described dc brushless motor (4), the B phase winding, the C phase winding links to each other, the control end that it is characterized in that described six switch transistor T 1～T6 links to each other with six road pwm control signals of described CPU (1) respectively, described dc brushless motor (4) is provided with photoelectric encoder (6) and position transducer (7), described photoelectric encoder (6), the pin position signal (8) of position transducer (7) and industrial sewing machine, the pedal signal (9) of industrial sewing machine links to each other with described CPU (1) respectively.
2. industrial sewing machine rapid parking method that uses industrial sewing machine quick shutdown system as claimed in claim 1 is characterized in that may further comprise the steps:
A. in described industrial sewing machine (3) runs up process, when the stopping signal of the sewing machine that provides when the pedal signal (9) of described industrial sewing machine (3) is effective, described CPU (1) is through the analysis and the processing of internal processes, export six road pwm control signals and give six switch transistor T 1～T6 of described motor master drive circuit (2) respectively, turn-off six switch transistor T 1～T6 at once, CPU (1) is gathered the rotating speed of described dc brushless motor (4) by described photoelectric encoder (6) and position transducer (7) subsequently, according to the tachometer value that records, estimate the PWM dutyfactor value of drive waveforms, open down three switch transistor T 4 of brachium pontis again with this dutyfactor value, T6 and T2 give (4) additional reaction squares of described dc brushless motor;
B. described CPU (1) is constantly measured the rotating speed of dc brushless motor (4), according to the PWM dutyfactor value of rotating speed adjustment drive waveforms, continues to increase the additional reaction square of dc brushless motor (4);
C. when the rotating speed of dc brushless motor (4) drop to one than the slow-speed of revolution after, the pwm control signal of CPU (1) output makes that three switch transistor T 4, T6 and T2 of described brachium pontis down are all open-minded, this moment, the PWM dutyfactor value of drive waveforms reached maximum, adopt dynamic braking, described dc brushless motor (4) is shut down, industrial sewing machine (3) is stopped fast.
3. industrial sewing machine rapid parking method according to claim 2, it is characterized in that described CPU (1) adopts digital PI to regulate algorithm, calculate the PWM dutyfactor value of drive waveforms, control three switch transistor T 4, T6 and T2 open-minded of described down brachium pontis, industrial sewing machine (3) is steadily stopped; Described digital PI regulates algorithm:
Wherein, K is a sampling sequence number, and T is a sample frequency, deviation when e (k) is the k time sampling, and Ki is an integral constant, and Kp is a proportionality constant, and u (k) is the PWM dutyfactor value of 6 tunnel drive waveforms of the K time sampling instant CPU (1) output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010127217 CN101834556A (en) | 2010-03-19 | 2010-03-19 | Quick shutdown system and method of industrial sewing machine |
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| CN 201010127217 CN101834556A (en) | 2010-03-19 | 2010-03-19 | Quick shutdown system and method of industrial sewing machine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332868A (en) * | 2011-10-18 | 2012-01-25 | 东南大学 | Low-power-consumption wideband low-noise amplifier |
| CN103078567A (en) * | 2012-12-28 | 2013-05-01 | 苏州汇川技术有限公司 | Tapered motor shutdown control system and method |
| CN103572514A (en) * | 2013-10-24 | 2014-02-12 | 卧龙电气集团股份有限公司 | Precise positioning system of industrial sewing machine and working method of precise positioning system |
| CN106487290A (en) * | 2016-11-02 | 2017-03-08 | 美的集团股份有限公司 | The stop control apparatus of motor, electric machine control system and its halt control method |
| CN106768053A (en) * | 2016-12-27 | 2017-05-31 | 浙江众邦机电科技有限公司 | It is applied to the data collecting system and signal processing method of industrial sewing machine |
| CN106814678A (en) * | 2015-11-27 | 2017-06-09 | 中国航空工业集团公司北京航空精密机械研究所 | The safety device of turntable overspeed protection is realized in a kind of utilization dynamic braking |
| CN107786128A (en) * | 2016-08-31 | 2018-03-09 | 茂达电子股份有限公司 | Motor driving device |
| CN115589177A (en) * | 2022-11-22 | 2023-01-10 | 深圳市锦锐科技股份有限公司 | Intelligent braking control method of direct current brushless motor |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332868A (en) * | 2011-10-18 | 2012-01-25 | 东南大学 | Low-power-consumption wideband low-noise amplifier |
| CN103078567A (en) * | 2012-12-28 | 2013-05-01 | 苏州汇川技术有限公司 | Tapered motor shutdown control system and method |
| CN103078567B (en) * | 2012-12-28 | 2016-03-23 | 苏州汇川技术有限公司 | Cone-shaped electric machine shutdown control system and method |
| CN103572514A (en) * | 2013-10-24 | 2014-02-12 | 卧龙电气集团股份有限公司 | Precise positioning system of industrial sewing machine and working method of precise positioning system |
| CN103572514B (en) * | 2013-10-24 | 2015-07-08 | 卧龙电气集团股份有限公司 | Precise positioning system of industrial sewing machine and working method of precise positioning system |
| CN106814678A (en) * | 2015-11-27 | 2017-06-09 | 中国航空工业集团公司北京航空精密机械研究所 | The safety device of turntable overspeed protection is realized in a kind of utilization dynamic braking |
| CN107786128A (en) * | 2016-08-31 | 2018-03-09 | 茂达电子股份有限公司 | Motor driving device |
| CN107786128B (en) * | 2016-08-31 | 2020-08-18 | 茂达电子股份有限公司 | Motor driving device |
| CN106487290B (en) * | 2016-11-02 | 2019-04-30 | 美的集团股份有限公司 | Stop control apparatus, electric machine control system and its halt control method of motor |
| CN106487290A (en) * | 2016-11-02 | 2017-03-08 | 美的集团股份有限公司 | The stop control apparatus of motor, electric machine control system and its halt control method |
| CN106768053A (en) * | 2016-12-27 | 2017-05-31 | 浙江众邦机电科技有限公司 | It is applied to the data collecting system and signal processing method of industrial sewing machine |
| CN115589177A (en) * | 2022-11-22 | 2023-01-10 | 深圳市锦锐科技股份有限公司 | Intelligent braking control method of direct current brushless motor |
| CN115589177B (en) * | 2022-11-22 | 2023-03-03 | 深圳市锦锐科技股份有限公司 | Intelligent braking control method of brushless direct current motor |
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Application publication date: 20100915 |