CN212270368U - Electromagnetic needle selector drive circuit and intelligent needle selector - Google Patents
Electromagnetic needle selector drive circuit and intelligent needle selector Download PDFInfo
- Publication number
- CN212270368U CN212270368U CN202020277685.5U CN202020277685U CN212270368U CN 212270368 U CN212270368 U CN 212270368U CN 202020277685 U CN202020277685 U CN 202020277685U CN 212270368 U CN212270368 U CN 212270368U
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- Prior art keywords
- driving
- needle
- chip
- driving chip
- electromagnetic
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- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000009940 knitting Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to a flat knitting machine field specifically is a needle ware drive circuit is selected to electromagnetism and intelligent selects needle ware. The electromagnetic needle selector comprises a micro-control unit and at least one driving chip, wherein the input end of the driving chip is connected to the micro-control unit, and the two output ends of the driving chip are respectively connected to two poles of the same needle selecting coil on the electromagnetic needle selector. The utility model discloses among the coil drive with direct current motor driver chip application, make full use of driver chip's excessive pressure protect function that overflows will select the needle ware to cross the probability that flows through the pressure damage and fall to minimumly to the accurate control of selecting the needle action is realized.
Description
Technical Field
The utility model relates to a flat knitting machine field specifically is a needle ware drive circuit is selected to electromagnetism and intelligent selects needle ware.
Background
The electromagnetic needle selector is used as an executing element for implementing needle selection control, and plays an important role in a needle selection control system of a computerized flat knitting machine. The control circuit of the electromagnetic needle selector on the market is mostly driven by a triode or a field effect transistor, the circuit is complex, and the over-current voltage protection function is avoided, so that the device is easily burnt. In order to ensure that the voltage at two ends of the needle selection blade is in a controllable range, the driving circuit of the electromagnetic needle selector is provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem lie in regulating and controlling selecting needle blade both ends voltage through circuit optimization, reach the effect of excessive pressure, overcurrent protection, undervoltage pinning, promoted the life of selecting the needle ware and the accurate control of action.
The utility model provides a technical scheme that its technical problem adopted is:
the driving circuit of the electromagnetic needle selector comprises a micro-control unit and at least one driving chip, wherein the input end of the driving chip is connected to the micro-control unit, and the two output ends of the driving chip are respectively connected to two poles of the same needle selecting coil on the electromagnetic needle selector.
An intelligent needle selector comprises the electromagnetic needle selector driving circuit.
Adopt above-mentioned technical scheme the utility model discloses, compare with prior art, beneficial effect is: the direct current motor driving chip is applied to a coil driving circuit, and the driving chip is provided with protection functions of overvoltage, overcurrent protection, undervoltage locking and the like, so that the voltage at two ends of the coil is maintained in a stable range, the damage rate of devices is reduced, the service life of a needle selector is prolonged, and the accurate control of needle selection action is improved.
Preferably, the present invention further provides:
the driving chip is connected with a dual power supply which is a driving power supply and a reference power supply respectively, the driving power supply is divided into two paths, the first path is connected with the driving chip, the other path is connected with a GND end of the driving chip through a capacitor, and the driving power supply is 24V; the reference power supply is connected with the driving chip and is 3.3V.
The driving chip is connected with a resistor, and the other end of the resistor is grounded.
The electromagnetic needle selector driving circuit adopts an AT8870 chip or a DRV8870 chip as a driving chip.
The driving circuit of the electromagnetic needle selector comprises 8 driving chips, the driving chips are controlled by a micro-control unit to form 16 half bridges, and the output ends of two half bridges on the same driving chip are connected to two poles of the same needle selecting coil.
Drawings
Fig. 1 is a schematic diagram of a circuit structure according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the connection between the output end of the driving chip and the needle selecting coil in the embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2: in this embodiment, 8 driving chips with the same model are adopted, the driving chip takes an AT8870 chip as an example, and 8 pins on each chip are respectively represented by numbers 1 to 8, where 2 and 3 are driving signal input pins and 6 and 8 are output pins. Each driving chip forms the same circuit H1-H8, taking H1 as an example, the 24V driving power input end is divided into two paths and respectively connected with a pull-down capacitor C1 and an AT8870 chip pin No. 5, namely a VM connection pin of the chip, and a pin 7 of the AT8870 chip is connected with a GND terminal after passing through a resistor R1. And a chip 4 pin is connected with a 3.3V reference power supply.
2 pins and 3 pins (namely O11 and O12) of a driving chip in H1-H8 are connected to the same micro-control unit, 6 pins and 8 pins (namely X10 and X11) of the driving chip in H1-H8 are respectively connected to two poles of the same needle selecting coil, so that the driving chip in H1-H8 forms 16 half bridges, receives control signals of the micro-control unit and realizes independent parallel control of 8 needle selecting coils.
The utility model discloses among applying direct current motor driver chip to the coil drive, through the IO mouth direct control driver chip's of micro-control unit logic control end, realize the different output level combination of driver chip half-bridge. The circuit makes full use of the overcurrent and overvoltage protection function of the driving chip, plays an accurate protection role for each needle selecting blade, and reduces the probability of damage of the needle selector due to overcurrent and overvoltage to the minimum.
Claims (7)
1. The driving circuit of the electromagnetic needle selector is characterized by comprising a micro-control unit and at least one driving chip, wherein the input end of the driving chip is connected to the micro-control unit, and the two output ends of the driving chip are respectively connected to two poles of the same needle selecting coil on the electromagnetic needle selector.
2. The electromagnetic needle selector driving circuit according to claim 1, wherein the driving chip is connected to a dual power source, which is a driving power source and a reference power source, respectively, the driving power source is divided into two paths, the first path is connected to the driving chip, and the other path is connected to a GND terminal of the driving chip through a capacitor; the reference power supply is connected with the driving chip.
3. The electromagnetic selector driving circuit according to claim 2, wherein the driving power supply is 24V and the reference power supply is 3.3V.
4. The electromagnetic needle selector drive circuit according to claim 1, wherein the drive chip is connected to a resistor, and the other end of the resistor is grounded.
5. The electromagnetic selector driving circuit according to claim 1, wherein the driving chip is an AT8870 chip or a DRV8870 chip.
6. The electromagnetic needle selector driving circuit according to claim 5, wherein the number of the driving chips is 8, 16 half-bridges are formed by the micro-control unit, and the output ends of two half-bridges on the same driving chip are connected to two poles of the same needle selecting coil.
7. An intelligent needle selector comprising the electromagnetic needle selector drive circuit according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020277685.5U CN212270368U (en) | 2020-03-09 | 2020-03-09 | Electromagnetic needle selector drive circuit and intelligent needle selector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020277685.5U CN212270368U (en) | 2020-03-09 | 2020-03-09 | Electromagnetic needle selector drive circuit and intelligent needle selector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212270368U true CN212270368U (en) | 2021-01-01 |
Family
ID=73874644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020277685.5U Expired - Fee Related CN212270368U (en) | 2020-03-09 | 2020-03-09 | Electromagnetic needle selector drive circuit and intelligent needle selector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212270368U (en) |
-
2020
- 2020-03-09 CN CN202020277685.5U patent/CN212270368U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210101 |