CN104400186A - Cascaded electric welding machine power supply topological structure - Google Patents
Cascaded electric welding machine power supply topological structure Download PDFInfo
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- CN104400186A CN104400186A CN201410709632.5A CN201410709632A CN104400186A CN 104400186 A CN104400186 A CN 104400186A CN 201410709632 A CN201410709632 A CN 201410709632A CN 104400186 A CN104400186 A CN 104400186A
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- 238000003466 welding Methods 0.000 title claims abstract description 79
- 230000003993 interaction Effects 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
- B23K9/1336—Driving means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention relates to a cascaded electric welding machine power supply topological structure. The cascaded electric welding machine power supply topological structure comprises an electric welding machine power supply host and a wire feeding machine; the electric welding machine power supply host comprises an electric welding machine main loop, a primary isolating switch power supply, a secondary isolating switch power supply, an electric welding machine controller and an electric welding machine secondary step-down switch power supply; the wire feeding machine comprises a secondary step-down switch power supply A, a secondary step-down switch power supply B, a wire feeding machine controller and a human-computer interaction interface which is used for inputting a control instruction to the wire feeding machine controller; the electric welding machine controller is connected with the wire feeding machine controller through a communication line. The cascaded electric welding machine power supply topological structure has the advantages of being small in size, low in cost, low in standby loss, high in comprehensive efficiency and high in reliability.
Description
Technical field
The present invention relates to electric welding machine technology, be specifically related to the power supply technique of the electric welding machine with external wire-feed motor.
Background technology
As shown in Figure 3, the electric welding machine of the current external wire-feed motor of the band with wire-feed motor is generally made up of welder power main frame and wire-feed motor.Welder power main frame controls cable by wire-feed motor and connects, and welder power main frame is provided with the main control panel being integrated with all control buttons, wire-feed motor is provided with the simple and easy control panel being only integrated with electric current, voltage, wire feed and welding button.The effects such as the effect of wire-feed motor mainly installs welding wire, adjustment portion welding parameter, relative to welder power main frame, wire-feed motor lightweight is little, near general placement welding procedure point, is convenient to welding parameter adjustment.Electric welding machine main frame mainly provides the control power supply of welding current and wire-feed motor motor, and electric welding machine main frame is connected in wire-feed motor by some cables, but due to volume and weight ratio comparatively large, generally can be arranged on fixing place.The control circuit of wire-feed motor motor (direct current generator) is integrated in electric welding machine main frame.The simulation specified rate of wire-feed motor alignment circuit is connected on electric welding machine main frame by long line (length can change because user needs).Wire-feed motor controls by Industrial Frequency Transformer+thyristor control scheme.
Based on said structure, there is following defect in current electric welding machine electric power-feeding structure: (1), due to the cable connecting length between wire-feed motor and electric welding machine main frame uncertain (general producer can only accomplish 50 meters), the control accuracy impact of therefore different conductor lengths on wire-feed motor motor is inconsistent.(2) be deliver on electric welding machine main frame by long cable because the simulation of wire-feed motor is given, length of cable is more long more disturbed.(3) control circuit of the given potentiometer of the simulation in wire-feed motor and motor is that analog circuit is easily subject to environmental pollution and causes parameter shift even to be lost efficacy.(4) control line at least 6 between wire-feed motor and electric welding machine main frame.(5) wire-feed motor feeding electric motors is high by IGCT+Industrial Frequency Transformer scheme cost, and volume is large, and Industrial Frequency Transformer exists open circuit loss, easy warming-up effect transformer life and waste electric energy.(6) the main radiator fan of electric welding machine main frame adopts multistage or Linear fan speed governing cost is higher, so generally adopt ac fan, cannot speed governing, and still full gear degree runs under a low load, is unfavorable for energy-conserving and environment-protective.
Summary of the invention
The object of the invention is to propose a kind of tandem type welder power topological structure, it can solve the technological deficiency that prior art occurs.
In order to achieve the above object, the technical solution adopted in the present invention is as follows:
Tandem type welder power topological structure, it comprises welder power main frame and wire-feed motor; Described welder power main frame comprises the secondary step-down switching power supply of electric welding machine major loop, elementary isolating switch power, secondary isolating switch power, electric welder control device and electric welding machine; Described wire-feed motor comprises secondary step-down switching power supply A, secondary step-down switching power supply B, wire-feed motor controller and for the human-computer interaction interface to wire-feed motor controller input control order; Electric welder control device is connected with wire-feed motor controller by communication line;
Electric welding machine major loop, for being converted to high voltage direct current by civil power;
Elementary isolating switch power, for high voltage direct current is converted to low-voltage DC, and exports described low-voltage DC to low-voltage direct bus;
Secondary isolating switch power, its input is connected with described low-voltage direct bus, and its first output is connected with IGBT drive circuit, and its second output is used for powering for electric welder control device;
The input of electric welding machine secondary step-down switching power supply, the input of secondary step-down switching power supply A are all connected with described low-voltage direct bus with the input of secondary step-down switching power supply B;
Electric welder control device is controlled by the duty of the secondary step-down switching power supply of electric welding machine to the first load;
Secondary step-down switching power supply A, for powering for wire-feed motor controller and human-computer interaction interface;
Wire-feed motor controller is controlled by the duty of second subprime step-down switching power supply to wire-feed motor motor.
Preferably, electric welding machine secondary step-down switching power supply, secondary step-down switching power supply A and secondary step-down switching power supply B are BUCK Switching Power Supply.
Preferably, described first load is radiator fan.
Preferably, described welder power main frame also comprises electric welding machine electronic switch, and electric welder control device is also for controlling the open/close states of the second load by electric welding machine electronic switch.Described second load is that electric welding machine air valve computer heating control exports.
Preferably, described wire-feed motor also comprises wire-feed motor electronic switch, and wire-feed motor controller is also for controlling the open/close states of the 3rd load by wire-feed motor electronic switch.Described 3rd load is wire-feed motor air valve.
Preferably, described electric welding machine major loop comprises rectifier bridge, lightning protection circuit and soft circuit, the input of rectifier bridge and the input Jun Yu city electrical connection of lightning protection circuit, the input of soft circuit is connected with the negative output terminal of rectifier bridge, the positive output end of rectifier bridge is all connected with the input of elementary isolating switch power with the output of soft circuit, or the input of soft circuit is connected with the positive output end of rectifier bridge, the negative output terminal of rectifier bridge is all connected with the input of elementary isolating switch power with the output of soft circuit.The positive output end of rectifier bridge or negative output terminal are also connected by the output of filter capacitor with soft circuit.
Preferably, wire-feed motor controller is also for forwarding described control instruction to electric welder control device.
The present invention has following beneficial effect:
1) need not Industrial Frequency Transformer be used, reduce volume and cost, reduce idling consumption, improve overall efficiency and reliability.
2) wire-feed motor adopts independently DC-DC reduction voltage circuit (BUCK) for motor is for providing accurate control voltage, not affect by wire-feed motor length of cable.
3) this power source design is convenient to motor and control circuit is integrated in wire-feed motor, controls more accurately reliable.
4) main radiator fan stepless speed regulation can be realized.
5) can according to load number, the quantity/power of adjustment Switching Power Supply output flexibly.
6) the individual loads regulation of each road power supply can be ensured, avoid the winding of some transformer to export the output precision of voltage regulation affecting other winding in heavy duty situation.
7) control cable only needs four: a pair cable namely to can be wire-feed motor motor, control circuit and human-computer interaction interface provides power supply.Two cables are only needed to communicate between wire-feed motor controller and electric welder control device.
8) communicated by the industrial bus RS485 that antijamming capability is very strong between wire-feed motor and electric welding machine main frame, communication distance can reach km, because user's on-site cable length generally can not more than 50 meters, therefore electric welder control performance can not limit by length of cable substantially.
9) wherein a way switch power supply output is short-circuited, the work of other loads can not be affected, such as, lead-out terminal short circuit (air valve computer heating control exports heating terminal) can be prevented, cause the power down of electric welder control device, thus the situation avoiding major loop out of control.
10) because wire-feed motor is controlled by separate controller, human-computer interaction interface can integrated all control buttons, facilitate operative.
11) lightning protection circuit, rectifier bridge, soft circuit and filter capacitor owing to sharing major loop, thus reduce costs.
Accompanying drawing explanation
Fig. 1 is the structural representation (in figure, broad arrow represents power supply relation, and lines arrow represents signal control planning) of the tandem type welder power topological structure of present pre-ferred embodiments.
Fig. 2 is the wire-feed motor topological structure of present pre-ferred embodiments;
Fig. 3 is the electric welding machine topological structure of prior art;
Fig. 4 is the circuit diagram of the push-pull converter of prior art;
Fig. 5 is the circuit diagram of the half-bridge converter of prior art;
Fig. 6 is the circuit diagram of the full-bridge converter of prior art.
Detailed description of the invention
Below, by reference to the accompanying drawings and detailed description of the invention, the present invention is described further.
As shown in Figure 1, a kind of tandem type welder power topological structure, it comprises welder power main frame and wire-feed motor.
Described welder power main frame comprises the secondary step-down switching power supply of electric welding machine major loop, elementary isolating switch power, secondary isolating switch power, electric welding machine electronic switch, electric welder control device and electric welding machine (can adopt BUCK Switching Power Supply).Described electric welding machine major loop comprises rectifier bridge, filter capacitor C1, lightning protection circuit and soft circuit.
Described wire-feed motor comprises secondary step-down switching power supply A, secondary step-down switching power supply B, wire-feed motor controller, wire-feed motor electronic switch and for the human-computer interaction interface to wire-feed motor controller input control order, wherein, described control instruction is inputted by user, comprises the control command to wire feed machine controller and/or electric welder control device.
Electric welder control device is connected with wire-feed motor controller by communication line (can adopt RS485 order wire).
The input of rectifier bridge and the input Jun Yu city electrical connection of lightning protection circuit, the input of soft circuit is connected with the negative output terminal of rectifier bridge, and the positive output end of rectifier bridge is all connected with the input of elementary isolating switch power with the output of soft circuit.The positive output end of rectifier bridge is also connected with the output of soft circuit by described filter capacitor C1.
Electric welding machine major loop, for being converted to high voltage direct current by civil power.
Elementary isolating switch power, for high voltage direct current is converted to low-voltage DC, and exports described low-voltage DC to low-voltage direct bus.
Secondary isolating switch power (can adopt single-ended counterattack Switching Power Supply), its input is connected with described low-voltage direct bus, and its first output is connected with IGBT drive circuit, and its second output is used for powering for electric welder control device.Wherein, if IGBT drive circuit has multiple, then the output winding quantity that comprises of the first output is consistent with the quantity of IGBT drive circuit, and the first output is for driving IGBT drive circuit and providing operating voltage for it.Same, the second output also can comprise at least one and export winding.
The input of electric welding machine secondary step-down switching power supply, the input of secondary step-down switching power supply A are all connected with described low-voltage direct bus with the input of secondary step-down switching power supply B.
Electric welder control device is controlled by the duty of the secondary step-down switching power supply of electric welding machine to radiator fan.Electric welder control device is also exported or other the open/close states of load of electric welding machine for being controlled electric welding machine air valve computer heating control by electric welding machine electronic switch.Low-voltage direct bus can also connect multiple electric welding machine electronic switch, connect other loads with extending user.
Secondary step-down switching power supply A, for powering for wire-feed motor controller and human-computer interaction interface.
Wire-feed motor controller is controlled by the duty of secondary step-down switching power supply B to wire-feed motor motor.Wire-feed motor controller is also for controlling other the open/close states of load of wire-feed motor air valve or wire-feed motor by wire-feed motor electronic switch.If described control instruction needs to electric welder control device, so wire-feed motor controller is also for forwarding described control instruction to electric welder control device.
The electric welding machine secondary step-down switching power supply of the present embodiment, secondary step-down switching power supply A and secondary step-down switching power supply B all adopt BUCK Switching Power Supply.
As shown in Figure 2, the welder power main frame of the present embodiment is without the need to control panel, and the human-computer interaction interface of wire-feed motor can arrange all control buttons.
The operation principle of the present embodiment is as follows:
The alternating current (i.e. civil power) of 2 phase/3 phases accesses rectifier bridge and carries out rectification, the negative output terminal of rectifier bridge is connected to soft circuit, and the positive output end of rectifier bridge and the output of soft circuit power to after electric capacity C1 filtering after filtering electric welding owner power stage loop and elementary isolating switch power.Lightning protection circuit is mainly used in the surge protection rectifier bridge and the circuit module afterwards thereof that absorb electrical network.Electric welding owner power stage loop can be conventional full-bridge converter (Fig. 6), half-bridge converter (Fig. 5) or push-pull converter (Fig. 4).Electric welding owner power stage loop is connected with electric welding owner power output terminal.Electric welder control device to electric welding owner power stage loop output pwm signal to carry out the control of duty to it.
The effect of elementary isolating switch power is that high-voltage dc voltage is converted to safe low-voltage dc voltage (such as, 24V, 36V or 48V, concrete voltage can select optimum output voltage according to overall cost) and basic insulation or the double insulation on former and deputy limit are provided, export as direct current safe voltage (lower than 50V).The elementary isolating switch power of the present embodiment adopts single channel to export, and to ensure the regulation at fully loaded transportation condition Xia Ge road output voltage, the complexity reducing transformer improves reliability.Meanwhile, single Winding Design is convenient to the Primary Components such as modularized design transformer can be multiplexing at whole serial electric welding machine, improves the reusability of components and parts and circuit, reduces the circuit debugging time, reduce overall material and development cost.
The switching power circuit of secondary switch power acquisition isolated form or non-isolated, for the various load of electric welding machine provides independent current source.Such as, in electric welding machine main frame, adopt secondary isolating switch power, for IGBT drive circuit provides independently isolation drive power supply, provide the power supply needed for electric welder control device simultaneously, as: +/-15V ,+5V etc.Due to IGBT drive circuit and the load of electric welder control device, comparatively Qing Jige road duty factor is comparatively even, can realize the good load regulation of uniformity, ensure the supply voltage precision and stability of IGBT drive circuit, make circuit working more reliable.
Electric welding machine secondary step-down switching power supply, secondary step-down switching power supply A and secondary switch power supply B (BUCK) by reference to Voltage Cortrol output voltage, can realize the adjustment of power output/electric current.This type of power supply is applicable to the load needing dynamic change, such as radiator fan and wire-feed motor motor etc.
All secondary switch power supplys adopt modularized design equally, can be general in all electric welding machines, and different output power power supply only need change related power device, and the element reusability increasing product reduces costs, and reduce debug time.
Electronic switch (comprising electric welding machine electronic switch and wire-feed motor electronic switch) directly can be powered for electric welding machine and some load of wire-feed motor, such as, if low-voltage direct bus output voltage is 36V, the air valve that can be directly 36V for the nominal voltage in wire-feed motor is powered.Described electronic switch can be relay or switching device.
The present embodiment is by electric welder control device (comprising MCU and peripheral circuit thereof) and wire-feed motor controller (comprising MCU and the peripheral circuit thereof) core as control system, all welding controlling functions of electric welding machine main frame are responsible for by electric welder control device, and all controlling functions (instruction of human-computer interaction interface responds, sends instruction and the control of wire-feed motor motor speed etc. to welder power main frame) of wire-feed motor are responsible for by wire-feed motor controller.
Communicated by industrial field bus RS485 between wire-feed motor controller and electric welder control device, specified rate and the control instruction (such as output voltage, electric current, receipts arc voltage, electric current, startup and shutdown etc.) of user's setting are sent on electric welder control device by data packet form.Meanwhile, wire-feed motor controller according to the rotating speed of the specified rate adjustment wire-feed motor motor of user's setting, reaches the effect controlling wire speed simultaneously.
In addition, human-computer interaction interface can integrated all electric welding controlling functions, user in the course of work without the need at the enterprising line operate of electric welding machine main frame, very convenient.
The present embodiment has following features:
1) use Switching Power Supply to replace Industrial Frequency Transformer, fall the little and cost of volume, reduce idling consumption, improve overall efficiency and reliability.
2) precision of voltage regulation and the load regulation of each road power supply is improved.
3) the wire feed precision of wire-feed motor and the reliability of long-term work is improved.
4) integrated MCU and complete control panel (i.e. human-computer interaction interface) in wire-feed motor, provides more flexible function and improves user operation convenience.
5) can realize at a lower cost radiator fan stepless/multistep speed regulation.
6) can according to load number, the quantity/power of adjustment Switching Power Supply output flexibly.
7) reduce wire-feed motor and control number of cables.
8) interference free performance of wire-feed motor motor control loop is improved.
9) Switching Power Supply has short-circuit protection function; wherein a way switch power supply exports and is short-circuited; other loads still can normally work (such as; the air valve heating terminal of electric welding machine main frame outside is short-circuited; electric welder control device still can cut out all output in time, and gives a warning).
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection domain of the claims in the present invention.
Claims (10)
1. tandem type welder power topological structure, is characterized in that, comprises welder power main frame and wire-feed motor; Described welder power main frame comprises the secondary step-down switching power supply of electric welding machine major loop, elementary isolating switch power, secondary isolating switch power, electric welder control device and electric welding machine; Described wire-feed motor comprises secondary step-down switching power supply A, secondary step-down switching power supply B, wire-feed motor controller and for the human-computer interaction interface to wire-feed motor controller input control order; Electric welder control device is connected with wire-feed motor controller by communication line;
Electric welding machine major loop, for being converted to high voltage direct current by civil power;
Elementary isolating switch power, for high voltage direct current is converted to low-voltage DC, and exports described low-voltage DC to low-voltage direct bus;
Secondary isolating switch power, its input is connected with described low-voltage direct bus, and its first output is connected with IGBT drive circuit, and its second output is used for powering for electric welder control device;
The input of electric welding machine secondary step-down switching power supply, the input of secondary step-down switching power supply A are all connected with described low-voltage direct bus with the input of secondary step-down switching power supply B;
Electric welder control device is controlled by the duty of the secondary step-down switching power supply of electric welding machine to the first load;
Secondary step-down switching power supply A, for powering for wire-feed motor controller and human-computer interaction interface;
Wire-feed motor controller is controlled by the duty of second subprime step-down switching power supply to wire-feed motor motor.
2. tandem type welder power topological structure as claimed in claim 1, it is characterized in that, electric welding machine secondary step-down switching power supply, secondary step-down switching power supply A and secondary step-down switching power supply B are BUCK Switching Power Supply.
3. tandem type welder power topological structure as claimed in claim 1, is characterized in that,
Described first load is radiator fan.
4. tandem type welder power topological structure as claimed in claim 1, is characterized in that,
Described welder power main frame also comprises electric welding machine electronic switch, and electric welder control device is also for controlling the open/close states of the second load by electric welding machine electronic switch.
5. tandem type welder power topological structure as claimed in claim 4, is characterized in that,
Described second load is that electric welding machine air valve computer heating control exports.
6. tandem type welder power topological structure as claimed in claim 1, is characterized in that,
Described wire-feed motor also comprises wire-feed motor electronic switch, and wire-feed motor controller is also for controlling the open/close states of the 3rd load by wire-feed motor electronic switch.
7. tandem type welder power topological structure as claimed in claim 6, is characterized in that,
Described 3rd load is wire-feed motor air valve.
8. tandem type welder power topological structure as claimed in claim 1, is characterized in that,
Described electric welding machine major loop comprises rectifier bridge, lightning protection circuit and soft circuit, the input of rectifier bridge and the input Jun Yu city electrical connection of lightning protection circuit; The input of soft circuit is connected with the negative output terminal of rectifier bridge, the positive output end of rectifier bridge is all connected with the input of elementary isolating switch power with the output of soft circuit, or the input of soft circuit is connected with the positive output end of rectifier bridge, the negative output terminal of rectifier bridge is all connected with the input of elementary isolating switch power with the output of soft circuit.
9. tandem type welder power topological structure as claimed in claim 8, it is characterized in that, the positive output end of rectifier bridge or negative output terminal are also connected by the output of filter capacitor with soft circuit.
10. tandem type welder power topological structure as claimed in claim 1, it is characterized in that, wire-feed motor controller is also for forwarding described control instruction to electric welder control device.
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| CN201410709632.5A CN104400186B (en) | 2014-11-27 | 2014-11-27 | Tandem type welder power topological structure |
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| CN105414713A (en) * | 2015-12-08 | 2016-03-23 | 上海沪工焊接集团股份有限公司 | Main loop for gas shielded welding and gas shielded welding machine with main loop |
| CN108340049A (en) * | 2017-12-29 | 2018-07-31 | 上海广为焊接设备有限公司 | Width funtion inputs welding machine wire feed system and method |
| CN108971705A (en) * | 2017-06-01 | 2018-12-11 | 廊坊优尼珀焊接设备有限公司 | Automatic wire feeder |
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| CN108340049A (en) * | 2017-12-29 | 2018-07-31 | 上海广为焊接设备有限公司 | Width funtion inputs welding machine wire feed system and method |
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| CN104400186B (en) | 2016-02-03 |
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