CN110424093A - A kind of brushless controller of Computerized flat knitting machine control roller operation - Google Patents
A kind of brushless controller of Computerized flat knitting machine control roller operation Download PDFInfo
- Publication number
- CN110424093A CN110424093A CN201910719266.4A CN201910719266A CN110424093A CN 110424093 A CN110424093 A CN 110424093A CN 201910719266 A CN201910719266 A CN 201910719266A CN 110424093 A CN110424093 A CN 110424093A
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- CN
- China
- Prior art keywords
- circuit
- output end
- input terminal
- connect
- brushless
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/88—Take-up or draw-off devices for knitting products
- D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/94—Driving-gear not otherwise provided for
- D04B15/96—Driving-gear not otherwise provided for in flat-bed knitting machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/17—Circuit arrangements for detecting position and for generating speed information
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
Abstract
The invention discloses a kind of brushless controllers of Computerized flat knitting machine control roller operation, comprising: photoelectric coupled circuit, input terminal are connect with the pulse signal output end of roller control module, for pulse signal to be converted to frequency signal；Governor circuit, the first input end of governor circuit and the output end of photoelectric coupled circuit connect, and are used for frequency acquisition signal；Sample circuit；First output end of its input terminal and governor circuit connection, for being sampled to frequency signal；The output end of filter circuit, input terminal and sample circuit connects, and for being filtered to frequency signal, is converted to timing signal；Power tube pushes circuit, the output end connection of input terminal and filter circuit, for the duty cycle signals according to timing signal adjustment output；Power tube pushes the output end of circuit and the second input terminal of governor circuit to connect, and governor circuit drives brushless motor according to duty cycle signals, to realize that brushless motor replaces stepper motor driving Computerized flat knitting machine control roller operation.
Description
Technical field
The present invention relates to controller technology fields, and in particular to a kind of brushless control of Computerized flat knitting machine control roller operation
Device.
Background technique
The mode of control roller operation is all such that the stepper motor with 90BYG type on the Computerized flat knitting machine in the whole nation at present,
Mix reduction gearbox (generally 1:20 or so) the connection roller of big retarding ratio, the pulse signal (pulse issued by receiving system
Frequency is adjustable), it is run by the stepper motor of stepper motor driver driving 90BYG type, the winding of fabric on real-time control roller
Opportunity, speed, angle be how many, tensile force size.
The existing scheme with stepper motor, has the disadvantage in that
The first, torsion is insufficient.The operating rate of machine requires to be getting faster, and efficiency requirements are also higher and higher, stepper motor
Work characteristics be raising with speed, torque increasingly declines, will increase by way of the power of expanded motor
Cost, while the rotary inertia of motor is increased again, and the increasing of inertia, lead to the needle plate of fast reaction in necessary a few tens of milliseconds
Folding real-time is unable to reach requirement, once the several hundred even damage of thousands of needles can be made by striker occur, thus quickly anti-
It brings challenges in the real-time answered；That the stepper motor speed of service can be brought substantially to mention by way of increasing the reduction ratio of reduction gearbox
It is high not the problem of.It is conflict in this principle.
The second, speed is inadequate.The working efficiency of machine is improved, the speed of service of roller must improve, the work of stepper motor
It is mainly used for positioning as feature, but run with load speed is not generally high, speed is a bottleneck.
Third, energy consumption are high.Stepper motor is position control motor, required precision of the concern to position, angle, 60 in energy consumption
~70% wastes.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of brushless controllers of Computerized flat knitting machine control roller operation, with solution
Certainly in the prior art using the problem that stepper motor driving straight-bar machines roller torsion is insufficient, speed is inadequate and energy consumption is high.
The embodiment of the invention provides a kind of brushless controllers of Computerized flat knitting machine control roller operation, comprising:
Photoelectric coupled circuit, input terminal are connect with the pulse signal output end of roller control module, for turning pulse signal
It is changed to frequency signal；
Governor circuit, the first input end of governor circuit and the output end of photoelectric coupled circuit connect, and are used for frequency acquisition signal；
First output end of sample circuit, input terminal and governor circuit connects, for sampling to frequency signal；
The output end of filter circuit, input terminal and sample circuit connects, and for being filtered to frequency signal, is converted to
Timing signal；
Power tube pushes circuit, and the output end connection of input terminal and filter circuit is defeated for being adjusted according to timing signal
Duty cycle signals out；Power tube push circuit output end and governor circuit the second input terminal connect, governor circuit according to
Duty cycle signals drive brushless motor.
Optionally, further includes: bus current sample circuit, input terminal are connect with bus circuit, bus current sampling electricity
The third input terminal of the output end on road and governor circuit connects, for detecting the current signal of bus circuit, and by current signal
It is sent to governor circuit；When over-current phenomenon avoidance occurs for bus circuit, governor circuit generates interruption.
Optionally, bus current sample circuit is also used to acquire the locking electric current of bus circuit；
Governor circuit adjusts locking torque according to locking electric current.
Optionally, further includes: busbar voltage sample circuit is connect, for detecting master with the third output end of governor circuit
Control the voltage signal of circuit；When over-voltage phenomenon occurs for governor circuit, busbar voltage sample circuit generates interruption.
Optionally, the relationship of frequency signal and duty cycle signals is to be positively correlated.
Optionally, further includes: without Hall detection circuit, the 4th output end of input terminal and governor circuit is connected.
Optionally, further includes: have Hall detection circuit, the 5th output end connection of input terminal and governor circuit is used for
Determine motor rotor position.
Optionally, further includes: the 4th input terminal of program burn writing mouth circuit, output end and governor circuit connects.
Optionally: energy supply control module pushes circuit connection with governor circuit, sample circuit, filter circuit and power tube.
Optionally: further include an angular displacement sensor, is arranged on the brushless motor, the angular displacement sensor
Output end is connect with the governor circuit；
After by the locking torque by the brushless motor locking, the nothing is detected by the angular displacement sensor
Whether brush motor rotates, if the brushless motor continues to rotate, cuts off the locking electric current；
By each rotational angle range of brushless motor described in the angular displacement sensor real-time detection, if brushless motor
Single revolution angular range be more than setting value when, then terminate the driving current of the brushless motor.
The embodiment of the present invention the utility model has the advantages that
1, main control chip receives frequency signal, is sampled, is filtered to it, obtains timing signal, the timing signal
Change the output duty cycle of main control chip P8, P9, P10, P11, P14 and P15 foot, and then power tube is pushed to change brushless motor
Drive duty ratio and phase sequence.Main control chip is handled pulse signal by the pulse signal of reception roller control module, is turned
It is changed to the operating status of duty ratio output control brushless motor, to realize that brushless motor replaces stepper motor to drive Computerized flat knitting machine
Control roller operation.
2, main control chip is turned round by bus current sampled acquisition locking electric current by control motor driven duty ratio control
Square, to realize that locking electric current is corresponding with torque.
3, after pulse signal is converted to frequency signal, then pass through actual needs and calculate corresponding output duty cycle,
Realize brushless motor substitution stepper motor in the application of Computerized flat knitting machine control roller driving.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 shows a kind of structure chart of the brushless controller of Computerized flat knitting machine control roller operation in the embodiment of the present invention；
Fig. 2 shows photoelectric coupled circuit schematic diagrames a kind of in the embodiment of the present invention；
Fig. 3 shows a kind of main control chip schematic diagram in the embodiment of the present invention；
Fig. 4 shows a kind of power tube promotion circuit structure diagram in the embodiment of the present invention；
Fig. 5 shows a kind of bus current sample circuit structure chart in the embodiment of the present invention；
Fig. 6 shows a kind of busbar voltage sample circuit structure chart in the embodiment of the present invention；
Fig. 7 shows a kind of no Hall detection circuit structure diagram in the embodiment of the present invention；
Fig. 8, which shows one kind in the embodiment of the present invention, Hall detection circuit structure diagram；
Fig. 9 shows a kind of program burn writing mouth circuit structure diagram in the embodiment of the present invention；
Figure 10 shows a kind of energy supply control module structure chart in the embodiment of the present invention；
Figure 11 shows a kind of LED light display circuit structure chart in the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Embodiment one
The speed regulation of brushless motor at present is substantially following two in technological layer application: analog voltage speed regulation and PWM speed regulation
(i.e. duty ratio speed regulation) is adjusted the speed using pulse frequency in the embodiment of the present invention.
The embodiment of the invention provides a kind of brushless controllers of Computerized flat knitting machine control roller operation, as shown in Figure 1, including
Photoelectric coupled circuit 1, governor circuit 2, sample circuit 3, filter circuit 4 and power tube push circuit 5, in which: the input of photoelectric coupled circuit 1
End is connect with the pulse signal output end of roller control module, for pulse signal to be converted to frequency signal；Governor circuit 2
First input end is connect with the output end of photoelectric coupled circuit 1, is used for frequency acquisition signal；The input terminal of sample circuit 3 and master control electricity
First output end on road 2 connects, for sampling to frequency signal；The output of the input terminal and sample circuit 3 of filter circuit 4
End connection, for being filtered to frequency signal, is converted to timing signal；The input terminal and filtered electrical of power tube promotion circuit 5
The output end on road 4 connects, for according to timing signal output duty cycle signal；Duty cycle signals are for driving brushless motor.
In the present embodiment, the function of governor circuit, sample circuit and filter circuit is realized by main control chip, optocoupler electricity
It is peripheral circuit that road and power tube, which push circuit,.As in Figure 2-4, main control chip be dsPIC33 family chip, P35 foot with
The output end of optocoupler UU1 connects, and P21 foot is connect with the output end of optocoupler UU2, optocoupler UU1,2 input terminal and the roller of straight-bar machines
Control module connection, is converted to frequency signal for the pulse signal that roller control module exports.Main control chip receives frequency signal,
It is sampled, is filtered, timing signal is obtained, the timing signal change main control chip P8, P9, P10, P11, P14 and
The output duty cycle of P15 foot, and then push the driving duty ratio and phase sequence of power tube change brushless motor.
In a particular embodiment, brushless motor parameter is 150W, DC48V, unloaded 1800 turns, reduction gearbox (1:50), instead of
The 2H20504 of former 90BYG stepper motor, 8 subdivisions, two speed of 1.6KHz to 3.2Khz.The pulse signal of roller driving, direction
The amplitude of signal is+12V, pulsating sphere 1-10KHz, and the system parameter of corresponding straight-bar machines complete machine is 1~100.Main control chip
Effect are as follows: the pulse signal for receiving roller control module handles pulse signal, and it is brushless to be converted to duty ratio output control
The operating status of motor, to realize that brushless motor replaces stepper motor driving Computerized flat knitting machine control roller operation.
As optional embodiment, as shown in Figure 5, further includes: bus current sample circuit, input terminal and bus electricity
Road connection, the output end of bus current sample circuit and the second input terminal of governor circuit connect, for detecting bus circuit
Current signal, and current signal is sent to governor circuit；When over-current phenomenon avoidance occurs for bus circuit, in governor circuit generation
It is disconnected.
In the present embodiment, the P20 pin of main control chip receives the sampled result of bus current sample circuit, carries out to it
Monitoring.
As optional embodiment, bus current sample circuit is also used to acquire the locking electric current of bus circuit；Master control
Circuit adjusts locking torque according to locking electric current.
In the present embodiment, main control chip is accounted for by bus current sampled acquisition locking electric current by controlling motor driven
Sky is than control torque, to realize that locking electric current is corresponding with torque.The corresponding relationship of electric motor locking electric current and torque such as 1 institute of table
Show.It is locked after brushless motor stalling, and locking torque is adjusted according to locking electric current, prevent roller from continuing after brushless motor stalling
It rolls, causes needle plate to be opened, the case where striker then occur.
| Electric motor locking electric current (A) | Locking torque (Nm) |
| 0.1 | 1 |
| 0.2 | 2 |
| 0.3 | 3 |
| 0.4 | 4 |
| 0.5 | 5 |
| 0.6 | 6 |
| 0.7 | 7 |
| 0.8 | 8 |
| 0.9 | 9 |
| 1 | 10 |
Table 1
As optional embodiment, as shown in Figure 6, further includes: busbar voltage sample circuit, input terminal and master control electricity
The third output end on road connects, for detecting the voltage signal of governor circuit；When over-voltage phenomenon occurs for governor circuit, bus electricity
Sample circuit is pressed to generate interruption.
In the present embodiment, the P19 pin of main control chip receives the sampled result of busbar voltage sample circuit, carries out to it
Monitoring.
As optional embodiment, the relationship of frequency signal and duty cycle signals is to be positively correlated.
In the present embodiment, the relationship of frequency signal and duty cycle signals is as shown in table 2.Pulse signal is being converted into frequency
After rate signal, then pass through actual needs and calculate corresponding output duty cycle, realizes brushless motor substitution brushless motor in computer
Straight-bar machines controls the application of roller driving.
Table 2
As optional embodiment, as shown in Figure 7, further includes: input terminal and governor circuit without Hall detection circuit
The 4th output end connection.
In the present embodiment, the P22-24 pin of main control chip connects no Hall detection circuit, is detected by counter electromotive force true
Motor rotor position is determined, without can be operated by hall position sensor.
As optional embodiment, as shown in Figure 8, further includes: have the input terminal and governor circuit of Hall detection circuit
The 5th output end connection, for determining motor rotor position.
In the present embodiment, the P25-27 chip pin (HA, HB, HC) of main control chip connects DC brushless motor hall signal
Line, motor hall signal form HALL_A, HALL_B, HALL_C signal after Resistor-Capacitor Unit filters and send main control chip, master control core
Piece sampling HALL_A, HALL_B, HALL_C low and high level is to obtain motor hall position, to export correct motor commutation
Signal, control motor run well.
As optional embodiment, as shown in Figure 9, further includes: the output end and governor circuit of program burn writing mouth circuit
Third input terminal connection.
In the present embodiment, P34, P37, P41 and P42 pin of main control chip connect the output end of program burn writing mouth circuit,
For the relationship of frequency signal and duty cycle signals, locking electric current and torque pair in control program, such as previous embodiment to be written
It should be related to.
As optional embodiment, as shown in Figure 10, further includes: energy supply control module, with governor circuit, sampling electricity
Road, filter circuit and power tube push circuit connection.
In the present embodiment, power input is connecting terminal J1_1 (connecing positive pole), J1_2 (connecing power cathode), electricity
Source voltage range 24V~48V.Direct current power control module provides the DC voltage of 3.3V, 5V and 15V for each chip circuit
Source.J1_3, J1_4, J1_5 (U, V, W) connect DC brushless motor line.
In a particular embodiment, as shown in figure 11, further include LED light, connect the P2 pin of main control chip, LED when failure
Lamp lights, and LED light is extinguished when normal.
Embodiment two
Further include an angular displacement sensor in the present embodiment to detect the rotation situation of brushless motor, is arranged in institute
It states on brushless motor, for detecting the rotation process of brushless motor, the output end of the angular displacement sensor and master control electricity
Road connection, rotor angular position information is fed back in governor circuit.
Particularly, in the present invention, provide locking torque be in order to which the brushless motor after each operating special angle is locked,
By fabric tightening on roller, tightening force cannot avoid greatly very much that fabric is broken or deformed simultaneously, if not providing locking torque
Words, roller can continue to rotate unsceptered under the tightening force of fabric itself, influence next step knitting process.
But in extraordinary circumstances, for example fabric is not tightened up or breaks, and leads to do not have pretightning force on roller, this
When, if brushless motor single run terminates to continue to provide locking torque, brushless motor can be driven to remain in operation, cause into
The failures such as one step is unsceptered need to detect thus after brushless motor provides locking torque whether continue have rotation.Specifically, when passing through
The locking torque detects whether the brushless motor turns by the angular displacement sensor for after the brushless motor locking
It is dynamic, if the brushless motor continues to rotate, the locking electric current is cut off, avoiding brushless motor from remaining in operation causes failure to be sent out
It is raw, it plays a protective role.
On the other hand, specific when each rotational angle range of roller, pass through the angular displacement sensor real-time detection institute
The each rotational angle range of brushless motor is stated, if the single revolution angular range of brushless motor is more than setting value, is terminated
The driving current of the brushless motor.When the single run angle over range of brushless motor, equipment is in failure or step-out shape
State, if finding failure not in time, it will knitting head, which occurs, to be interrupted, and loss is excessive, passes through angle displacement transducer in the present invention
Device detects in time to be out of order and shuts down, and plays the role of dual fail-safe.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where various modifications and variations can be made, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (10)
1. a kind of brushless controller of Computerized flat knitting machine control roller operation characterized by comprising
Photoelectric coupled circuit, input terminal are connect with the pulse signal output end of roller control module, for being converted to pulse signal
Frequency signal；
Governor circuit, the first input end of the governor circuit are connect with the output end of the photoelectric coupled circuit, described for acquiring
Frequency signal；
Sample circuit, input terminal are connect with the first output end of the governor circuit, for adopting to the frequency signal
Sample；
Filter circuit, input terminal are connect with the output end of the sample circuit, for being filtered to the frequency signal, are turned
It is changed to timing signal；
Power tube pushes circuit, and input terminal is connect with the output end of the filter circuit, for according to the timing signal tune
The duty cycle signals of whole output；The power tube pushes the output end of circuit to connect with the second input terminal of the governor circuit,
The governor circuit drives brushless motor according to the duty cycle signals.
2. brushless controller according to claim 1, which is characterized in that further include: bus current sample circuit, input
End is connect with bus circuit, and the output end of the bus current sample circuit is connect with the third input terminal of the governor circuit,
The governor circuit is sent to for detecting the current signal of bus circuit, and by the current signal；When the bus circuit
When over-current phenomenon avoidance occurs, the governor circuit generates interruption.
3. brushless controller according to claim 2, which is characterized in that the bus current sample circuit is also used to acquire
The locking electric current of the bus circuit；
The governor circuit adjusts locking torque according to the locking electric current.
4. brushless controller according to claim 1, which is characterized in that further include: busbar voltage sample circuit, and it is described
The third output end of governor circuit connects, for detecting the voltage signal of the governor circuit；When the governor circuit occurred
When pressing phenomenon, the busbar voltage sample circuit generates interruption.
5. brushless controller according to claim 1, which is characterized in that the frequency signal and the duty cycle signals
Relationship is to be positively correlated.
6. brushless controller according to claim 1, which is characterized in that further include: without Hall detection circuit, input terminal
It is connect with the 4th output end of the governor circuit.
7. brushless controller according to claim 1, which is characterized in that further include: there are Hall detection circuit, input terminal
It is connect with the 5th output end of the governor circuit, for determining motor rotor position.
8. brushless controller according to claim 1, which is characterized in that further include: program burn writing mouth circuit, output end
It is connect with the 4th input terminal of the governor circuit.
9. brushless controller according to claim 1, which is characterized in that further include: energy supply control module, with the master control
Circuit, the sample circuit, the filter circuit and the power tube push circuit connection.
10. brushless controller according to claim 3, which is characterized in that further include an angular displacement sensor, setting exists
On the brushless motor, the output end of the angular displacement sensor is connect with the governor circuit；
After by the locking torque by the brushless motor locking, the brushless electricity is detected by the angular displacement sensor
Whether machine rotates, if the brushless motor continues to rotate, cuts off the locking electric current；
By each rotational angle range of brushless motor described in the angular displacement sensor real-time detection, if the list of brushless motor
When secondary rotational angle range is more than setting value, then the driving current of the brushless motor is terminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910719266.4A CN110424093B (en) | 2019-08-05 | 2019-08-05 | Brushless controller for controlling roller operation of computerized flat knitting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910719266.4A CN110424093B (en) | 2019-08-05 | 2019-08-05 | Brushless controller for controlling roller operation of computerized flat knitting machine |
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| Publication Number | Publication Date |
|---|---|
| CN110424093A true CN110424093A (en) | 2019-11-08 |
| CN110424093B CN110424093B (en) | 2021-02-12 |
Family
ID=68414249
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910719266.4A Active CN110424093B (en) | 2019-08-05 | 2019-08-05 | Brushless controller for controlling roller operation of computerized flat knitting machine |
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| CN (1) | CN110424093B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337401A (en) * | 2021-12-23 | 2022-04-12 | 常州泽明自动化设备有限公司 | Start-stop control method and system for crawler and drive controller |
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| Publication number | Publication date |
|---|---|
| CN110424093B (en) | 2021-02-12 |
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