CN203124913U - Control circuit of wire feeder - Google Patents
Control circuit of wire feeder Download PDFInfo
- Publication number
- CN203124913U CN203124913U CN 201220710638 CN201220710638U CN203124913U CN 203124913 U CN203124913 U CN 203124913U CN 201220710638 CN201220710638 CN 201220710638 CN 201220710638 U CN201220710638 U CN 201220710638U CN 203124913 U CN203124913 U CN 203124913U
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Abstract
The utility model relates to a control circuit of a wire feeder. The control circuit of the wire feeder comprises a power source, a single chip microcomputer and a wire feeder body, wherein the output voltage of the power source is the output voltage of a welding machine, the output voltage is rectified and filtered through a diode V5 and a capacitor C1 and divided into two paths, one path of the output voltage is used as a main power source of the wire feeder, the other path of the output voltage passes through a triode V11 and a diode V12 and supplies a +18V direct current and a +12V direct current which are used as a power source of a control return circuit, the power source is connected with a pin one of the single chip microcomputer N1 through an R7, and pins from eleven to fourteen of the single chip microcomputer N1 are connected with the wire feeder through a triode of V7, a triode of V8, a resistor R13 and a triode of V1. According to the control circuit of the wire feeder, due to the facts that the arc voltage of the welding machine is used as the power source and the level of the arc voltage limits the upper limit of the wire feeding speed simultaneously, welding wires can be effectively prevented from being adhered workpieces, the wire feeding speed is disturbed along with changes of the arc voltage, melting point transition is benefited, welding splash is reduced, welding forming is improved, outputting efficiency of the welding machine is improved, and cost is reduced. A wire feeding circuit can not only be installed in an all-in-one machine, but also can be installed in the wire feeding machine, and the wire feeding circuit can not be constrained by lengths of connecting lines.
Description
Technical field
The present invention relates to a kind of control circuit, specifically, is a kind of control circuit of wire-feed motor.
Background technology
When welding on a large scale, need to use a large amount of welding wires, manual wire feed does not obviously catch up with the speed of welding, therefore need to use wire-feed motor to carry out wire feed, actual conditions difference, the speed of wire feed are also different, if excessive velocities, then welding wire can with the workpiece adhesion, be difficult to remove; Speed is crossed slowly the then easy rosin joint of insufficient solder connection; Yet traditional wire-feed motor adopts Industrial Frequency Transformer to control, its voltage constant, and change speed is difficult, and the transformer power consumption is bigger, also not environmental protection; And transformer weight is big, and it is very inconvenient that carrying is got up.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of quality control circuit light, that can change speed, energy-conserving and environment-protective to substitute traditional transformer.
Technical scheme: the present invention adopts following technical scheme to realize: a kind of control circuit for wire feeder, comprise power supply, single-chip microcomputer, wire-feed motor, described electric power output voltage is the output voltage of welding machine, output voltage is through diode V5, capacitor C 1 rectifying and wave-filtering, be divided into two-way, the one tunnel makees main power source for wire-feed motor uses; Another road is through triode V11, diode V12, provide+18V and+direct current of 12V makes the power supply of control loop, power supply connects wire-feed motor by 1 pin that R7 connects single-chip microcomputer N1 behind 11-14 pin process triode V7, the triode V8 of single-chip microcomputer N1, resistance R 12, resistance R 13, the triode V1.
Control voltage adds to 9 pin of power amplifier N2C by diode V10, and will control voltage and 10 pin voltages compare, as less than 10 pin voltages, 8 pin will be exported high level and make triode V6 conducting, the adhesive of K1 relay, control circuit for wire feeder voltage disconnects, and resistance R 1 is connected to motor M 1 simultaneously, accelerates the loss of voltage on the motor M 1.
Control voltage-regulation scope 1.0～3.0V, voltage is not 0V when controlling.
Control voltage adds to 5 pin of power amplifier N2B by resistance R 23, forms amplifying circuits with resistance R 31, variable resistor W2, resistance R 24, provides adjustable wire feed voltage reference, for the speed speed of regulating wire-feed motor.
1,2,9 pin of single-chip microcomputer N1 are formed a difference amplifier, and 1 pin is provided through diode V5, resistance R 7, resistance R 25 dividing potential drops by the welding machine output voltage; 2 pin connect feedback voltage signal, and feedback voltage signal provides with the synthetic back of multichannel reference voltage through resistance R 11, resistance R 14, resistance R 8 relatively forms a difference amplifier with 1 pin, 11,14 pin output driving triode V8, triode V7.
Also comprise current sampling resistor R4, when the wire-feed motor electric current during excessive or wire-feed motor self short circuit, the electric current that resistance R 4 produces feeds back to 4 pin of single-chip microcomputer N1 by resistance R 5, and 11, the 14 pin output pulse widths of N1 are reduced.
Beneficial effect: the present invention compared with prior art uses the arc voltage of welding machine as power supply, and the height of arc voltage limits the wire feed rate upper limit simultaneously, can prevent effectively that welding wire is bonded on the workpiece, wire feed rate changes disturbance with arc voltage, favourable fusing point transition, reduce spatter, improve welding fabrication; Improve the delivery efficiency of welding machine, reduce cost, and 6, wire feeding circuit both can be contained in the all-in-one, also can be contained in the wire-feed motor, do not connected the constraint of line length.
Description of drawings
Fig. 1 is circuit diagram of the present invention.
The specific embodiment
Below in conjunction with Figure of description the present invention is described in further detail:
The present invention relates to a kind of control circuit for wire feeder, comprise power supply, single-chip microcomputer, wire-feed motor, power supply provides: the voltage that wire-feed motor is provided as the energy with the output voltage (arc voltage) of welding machine, overcome and originally will use very big Industrial Frequency Transformer as the deficiency of wire-feed motor power supply, so both save the energy, saved material, to have alleviated weight.
The welding machine output voltage is divided into two-way through V5, C1 rectifying and wave-filtering.One the tunnel makees main power source for wire-feed motor uses; Another road is through V11, V12, provide+18V and+12V, the power supply of making control loop uses.
Control voltage adds to 9 pin of N2 by V10, compares with 10 pin voltages, as less than 10 pin voltages, 8 pin will be exported high level and make the V6 conducting, the adhesive of K1 relay, and the wire-feed motor circuit voltage disconnects, R1 resistance is connected to M1 simultaneously, accelerates the loss of voltage on the M1 motor, plays the braking action of wire-feed motor.Control voltage-regulation scope 1.0～3.0V, voltage is not 0V when controlling.
Control voltage is formed amplifying circuit by 5 pin and R31, W2, the R24 that R23 adds to N2B, and adjustable wire feed voltage reference is provided, for the speed speed of regulating wire-feed motor.W1 arranges minimum wire feed rate benchmark, and W2 arranges maximum wire feed rate benchmark.
N1 produces pwm pulse, the speed of control wire-feed motor.1,2,9 pin of N1 are formed a difference amplifier, and 1 pin is provided through V5, R7, R25 dividing potential drop by the welding machine output voltage; 2 pin connect feedback voltage signal, and feedback voltage signal provides with the synthetic back of multichannel reference voltage through R11, R14, R8 relatively forms a difference amplifier with 1 pin, and width is exported in the pulse of control N1, is exported by 11,14 pin.11, the 14 pin output of N1 drives V8, V7, further amplifies to promote V1 again, makes V1 have enough conducting electric currents (energy) to use for wire-feed motor.
The pulse width of N1 output determines the height of wire-feed motor voltage, pulse width is more wide, the voltage that wire-feed motor obtains is more high, otherwise, pulse width is more narrow, wire-feed motor voltage is more low, thereby realizes that wire-feed motor voltage by the adjusting of 2.5V to 24V, just makes wire-feed motor possess the wire feed ability of 1.5m to 15m.
The effect of resistance R 4 is wire-feed motor current samplings, and when the wire-feed motor electric current during excessive or wire-feed motor self short circuit, the electric current of generation feeds back to 4 pin of N1 by R5, and SG352411,14 pin output pulse widths are reduced, and plays electric current and suppresses protective effect.
Electric current is generally bigger during the wire feeding motor starting, in order to be unlikely to the mistake protection, has designed the delay protection circuit that R19, N2 form, and the feedback reference voltage when improving starting is effectively started wire feeding motor, further improves the success rate of striking.
As when weldingvoltage is low, according to the characteristics of gas shielded welding machine, this moment, welding current was equally also smaller, and the wire feed rate of requirement is also very low; Be bonded on the workpiece as welding wire, this moment, output voltage also was close to 0V, and this circuit is input as 0, and the voltage of wire-feed motor also reduces to 0 in the very short time, effectively stops the waste of welding wire.
This circuit applied in a flexible way the gas shielded welding machine output voltage characteristics and design, not only energy-conservation, and adaptive ability is very strong.
Claims (6)
1. control circuit for wire feeder, it is characterized in that: comprise power supply, single-chip microcomputer, wire-feed motor, described electric power output voltage is the output voltage of welding machine, and output voltage is through diode V5, capacitor C 1 rectifying and wave-filtering, be divided into two-way, the one tunnel makees main power source for wire-feed motor uses; Another road is through triode V11, diode V12, provide+18V and+direct current of 12V makes the power supply of control loop, power supply connects wire-feed motor by 1 pin that R7 connects single-chip microcomputer N1 behind 11-14 pin process triode V7, the triode V8 of single-chip microcomputer N1, resistance R 12, resistance R 13, the triode V1.
2. control circuit for wire feeder according to claim 1, it is characterized in that: control voltage adds to 9 pin of power amplifier N2C by diode V10, and will control voltage and 10 pin voltages compare, as less than 10 pin voltages, 8 pin will be exported high level and make triode V6 conducting, the adhesive of K1 relay, and control circuit for wire feeder voltage disconnects, resistance R 1 is connected to motor M 1 simultaneously, accelerates the loss of voltage on the motor M 1.
3. control circuit for wire feeder according to claim 1 is characterized in that: control voltage-regulation scope 1.0～3.0V, voltage is not 0V when controlling.
4. control circuit for wire feeder according to claim 1, it is characterized in that: control voltage adds to 5 pin of power amplifier N2B by resistance R 23, form amplifying circuit with resistance R 31, variable resistor W2, resistance R 24, provide adjustable wire feed voltage reference, for the speed speed of regulating wire-feed motor.
5. control circuit for wire feeder according to claim 1 is characterized in that: 1,2,9 pin of single-chip microcomputer N1 are formed a difference amplifier, and 1 pin is provided through diode V5, resistance R 7, resistance R 25 dividing potential drops by the welding machine output voltage; 2 pin connect feedback voltage signal, and feedback voltage signal provides with the synthetic back of multichannel reference voltage through resistance R 11, resistance R 14, resistance R 8 relatively forms a difference amplifier with 1 pin, 11,14 pin output driving triode V8, triode V7.
6. control circuit for wire feeder according to claim 1, it is characterized in that: also comprise current sampling resistor R4, when the wire-feed motor electric current during excessive or wire-feed motor self short circuit, the electric current that resistance R 4 produces feeds back to 4 pin of single-chip microcomputer N1 by resistance R 5, and 11, the 14 pin output pulse widths of N1 are reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220710638 CN203124913U (en) | 2012-12-21 | 2012-12-21 | Control circuit of wire feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220710638 CN203124913U (en) | 2012-12-21 | 2012-12-21 | Control circuit of wire feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203124913U true CN203124913U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220710638 Expired - Lifetime CN203124913U (en) | 2012-12-21 | 2012-12-21 | Control circuit of wire feeder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203124913U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084707A (en) * | 2012-12-21 | 2013-05-08 | 南通富力机电设备有限责任公司 | Wire feeder control circuit |
| CN103920970A (en) * | 2014-04-03 | 2014-07-16 | 北京星航机电装备有限公司 | Welding wire speed control system |
| CN106425030A (en) * | 2016-11-02 | 2017-02-22 | 昆山华恒焊接股份有限公司 | Electric arc control circuit |
-
2012
- 2012-12-21 CN CN 201220710638 patent/CN203124913U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084707A (en) * | 2012-12-21 | 2013-05-08 | 南通富力机电设备有限责任公司 | Wire feeder control circuit |
| CN103084707B (en) * | 2012-12-21 | 2014-07-30 | 南通富力机电设备有限责任公司 | Wire feeder control circuit |
| CN103920970A (en) * | 2014-04-03 | 2014-07-16 | 北京星航机电装备有限公司 | Welding wire speed control system |
| CN103920970B (en) * | 2014-04-03 | 2016-05-25 | 北京星航机电装备有限公司 | A kind of welding wire speed-adjusting and control system |
| CN106425030A (en) * | 2016-11-02 | 2017-02-22 | 昆山华恒焊接股份有限公司 | Electric arc control circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
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| CX01 | Expiry of patent term |