CN100361772C - Mechanical welding power source with starting circuit - Google Patents
Mechanical welding power source with starting circuit Download PDFInfo
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- CN100361772C CN100361772C CNB011344385A CN01134438A CN100361772C CN 100361772 C CN100361772 C CN 100361772C CN B011344385 A CNB011344385 A CN B011344385A CN 01134438 A CN01134438 A CN 01134438A CN 100361772 C CN100361772 C CN 100361772C
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Abstract
The invention relates to welding power supply technique, relates to an engine driven welding power supply including a start and/or a hot start output. The engine driven welding power supply includes: a welding output winding with a welding output having a welding V-A curve of a first slope in a welding range and below the welding range; a second output winding with a second welding output having a second welding V-A curve of a second slope below the welding range, in which, the second slope is less steep than the first slope; and an output circuit is connected to receive the welding output and the second output, in which combining the welding output with the second output to provide a power supply output. The invention provides an engine driven welding power supply system without field adjusting to generate the start output or the hot start output, which is economical, and without complicated circuit can easily be provided.
Description
Technical field
The present invention relates generally to source of welding current technology.Specifically, it relates to the mechanical welding power source that comprises starting (dig) and/or hot exposure output.
Background technology
Mechanical welding power source can (be also referred to as the driving of oscillator rectifier (alternator-rectifier) device by dc generator or alternating current generator.Alternating current generator also comprises reactor usually except oscillator (alternator), be rectifier afterwards, so that DC to be provided output.Exchange and drive normally constant-current type machine of the source of welding current, and the output VA characteristic curve of the interchange driving source of welding current has very steep negative slope (the voltage reduction can make electric current increase slightly) usually.That is to say that in an excursion of output voltage, output current is near constant.This source of welding current is specially adapted to those welding that require approximate constant current output and uses (as, dull and stereotyped welding).The output current variation generally is by selecting a tap on the reactor to provide on a large scale.A kind of like this mechanical welding power source of prior art is the Miller Big Blue 302 sources of welding current.
Mechanical welding power source used herein be a kind of can be by the source of welding current of generator drive.It can include, but is not limited to engine and generator.Welding used herein V-A curve is the curve that forms during to the relation curve of output current at the output voltage that draws.Usually, transverse axis is an electric current, and vertical pivot is a voltage.Output V-A slope of a curve is this slope of a curve, and not too steep slope means that the reduction of arc voltage can make the output current increase more.Welding scope used herein refers to the curve of output part when welding usually, for example from about 20V to about 40-50V.V-A curve in constant current machine welding scope has almost vertical slope usually.Refer to the output voltage (in some system, being to be less than about 20V) that is lower than the voltage when welding usually below the welding scope used herein.Starting used herein output refers to the typical case and welds output below the scope, welds below the scope the typical case, and electric current increases along with the reduction of arc length (and arc voltage thus).Hot exposure output used herein also refers to the following output of typical welding scope, and allows welding process to start greater than the electric current that provides after this process arrives its operating point.Overcurrent is provided by the output voltage that reduces below the welding scope usually, and below the welding scope, the V-A slope of a curve is not too steep.Even can realize welding by starting and/or hot exposure output, the scope that starting output or hot exposure output are provided is also below the welding scope.
Starting output is expected to provide for the user thermal control of solder joint (weld puddle).Utilize starting output, shorten arc length and can reduce output voltage, will increase output current like this, thereby increase the heat that gives solder joint.Equally, thermal starting also is desirable, because it allows welding process to start with additional heat energy.
The V-A curve of output that dc generator has is: along with the reduction of output voltage, output current increases, and promptly DC generator provides " sagging " or intrinsic starting output in the V-A curve.Therefore, by changing the distance between welding electrode and the workpiece, the welding machine of the use DC driven source of welding current can be controlled the temperature of solder joint.When retracting welding electrode, electric arc (output) voltage increases, and output current descends simultaneously.When welding electrode almost connected workpiece, arc voltage reduced (short-circuit conditions), and output current increases simultaneously.
Alternating current generator does not have intrinsic starting output.The U.S. Patent No. 5 of issue on March 31st, 1998,734, a kind of mechanical welding power source system of prior art has been described in 147, exercise question is " method and apparatus of the output of the automatically controlled generator drive source of welding current ", it is attached in the middle of this paper as a reference, and the shape (electronic field control shaping) that this patent is adjusted the V-A curve with electric field provides starting and thermal starting output.The electric field adjustment allows output V-A curve to become needed shape, is included in starting output and thermal starting output are provided below the welding scope.But this mechanical welding power source is complicated, and, although be applicable to that such as the such welding application of pipe weldering, the versatility that it provides (and expense) has exceeded the needs that other welding is used.
Do not possess electric field and adjust the AC system of the electrical field shape of curve of output, be not used in the ready-made device that starting output and thermal starting output are provided as MillerBig Blue 302 .For starting output, this V-A curve is not provided at interior vertical substantially slope of welding scope and the not too steep slope below the welding scope.Therefore, the mechanical welding power source system that provides a kind of obstructed interlude adjustment to produce starting output and/or hot exposure output is desirable just.This system is preferably economical, and does not need complicated circuit just can easily provide.
Summary of the invention
According to first scheme of the present invention, a kind of mechanical welding power source comprises a welding output winding and one second output winding.This welding output winding has a welding output, and this welding is exported in the welding scope and all had the welding V-A curve of first slope below the welding scope.The second output winding has one second output, and this second output has the 2nd V-A curve of second slope below the welding scope.Second slope does not have first slope steep.An output circuit is connected to can receive with Combination Welding output and second to be exported so that power supply output is provided.
According to alternative plan of the present invention, a kind of mechanical welding power source comprises a welding output winding and second an output winding with second output with welding output.An output circuit receives and the Combination Welding output and second output, so that be provided at the power supply output that the threshold value place of welding scope bottom has break.
In various embodiments, a resistance is between the second output winding and output circuit, a little less than the coupling of the coupling ratio welding output winding of the second output winding is wanted in other words.
In other embodiments, welding output winding is a part of separating generator with the second output winding, or the part of same generator.
In various embodiments, rectification circuit between the second output winding and output circuit, and/or combination and the welding of the second output winding and rectification circuit to export winding in parallel.
In other alternative embodiment, second winding is the starting winding, and second output is starting output, and/or second winding is the hot exposure winding, and second output is hot exposure output.
According to third party's case of the present invention, a kind of method that is used to provide bonding power to export comprises by welding winding generation bonding power.Bonding power is within the welding scope and have the V-A curve of first slope below the welding scope.Secondary power is produced by second winding.Secondary power has the V-A curve of second slope below the welding scope, and second slope does not have first slope steep.Bonding power and secondary power add and are used to provide bonding power output together.
According to cubic case of the present invention, a kind of method that is used to provide bonding power to export comprises: produce bonding power; Produce secondary power; And secondary power and bonding power added together so that a welding output to be provided, this welding output threshold value place bottom the welding scope has a break.
In the embodiment of alternative, secondary power provides by an impedance, and/or produce secondary power method comprise the power that produces the impedance restriction.
In the embodiment of other alternative, the method that produces bonding power comprises one or two generator of rotation.
In various alternative embodiment, secondary power is by rectification, and it is a starting power, and/or hot exposure power.
By understanding following accompanying drawing, detailed description and appended claim, those skilled in the art is appreciated that other principal character of the present invention and advantage.
Description of drawings
Fig. 1 is the block diagram of the mechanical welding power source system of structure according to the present invention;
Fig. 2 is the circuit diagram according to the mechanical welding power source system of preferred embodiment structure; And
Fig. 3 represents based on V-A curve map of the present invention.
The specific embodiment
Should understand before at least one embodiment of the present invention is explained in detail, the present invention be not limited in its application in shown in the accompanying drawing or in the following description the statement arrangements of elements and structure detail in.The present invention allows other embodiment, perhaps implements in every way or carries out.It is also understood that wording and term are for convenience of description as used herein, and can not be considered to limit the present invention.Identical lable number is in order to the expression components identical.
Although the present invention describes with reference to a specific mechanical welding power source system, should be appreciated that at the very start the present invention also can use other circuit, system, generator to wait and realize.
Usually, the present invention includes a mechanical welding power source system, it provides typical welding output, as constant current output and starting output.These outputs are combined and the V-A curve of output has a break (slope variation) at the threshold value place of welding scope bottom.Like this, in the welding scope, as between about 20-40V, export normally constant current, but when low output voltage, as when being lower than about 20V, electric current increases along with the decline of output voltage.Fig. 3 shows the curve of expression output example.Starting output also can be used as hot exposure output, and hot exposure is provided when being started with convenient welding process.
The block diagram of the mechanical welding power source system that makes up according to the present invention is shown in Figure 1, and it comprises an engine or prime mover 101, generator 103, welding output 105, starting output 107 and output circuit 108.Their co-operation are exported 109 (or power supply outputs), curve as shown in Figure 3 so that machine to be provided.
The schematic diagram that embodies the source of welding current of the present invention is shown in Figure 2, it comprises starting stator 201, starting transformer 203, starting rectification circuit 205, welding stator 207, welding reactor 209 and welding rectifier 210, and they provide the output of machine to output 211.Preferred embodiment uses Miller Big Blue 302 mechanical welding power source systems to realize that it comprises the controller that is used to weld output.Usually, welding output reduces output current and controls by increasing exciting current and increase output current and reducing exciting current.Exciting current increases according to the current feedback of comparing with user-selected current setting value or reduces.Adopt U.S. Patent No. 5,734 in another embodiment, 147 power-supply system, the part of electric field adjustment is controlled welding output at least
In the preferred embodiment, starting stator 201 comprises starting winding 213,214 and 215, they also provide auxiliary power output (as 110 or 220V exchange).Starting winding 213-215 does not share stator with welding output winding, and like this, the field of welding output is adjusted just can not influence starting output.On the contrary, the assist field adjustment can provide the auxiliary output of constant voltage of hope.Starting winding 213 and 214 (being also referred to as second winding 213 and 214) is weak coupling (coefficient of coup is lower than the coefficient of coup of welding output winding and/or auxiliary output winding), thereby provide sagging output--along with the reduction of starting output voltage, starting current increases when being output as constant voltage (even auxiliary).In the embodiment of an alternative, sagging output is by 218 such impedances obtain on winding 213 and 214 outputs such as resistance.Resistance 218 between starting winding and output circuit is not comprised in the preferred embodiment in the drawings.Like this, no matter to be the starting output (being sagging output) that the preferred embodiment or the embodiment of alternative all can provide the impedance restriction.
Starting winding 213 and 214 output are provided for transformer 217, and its reduces voltage so that the rectification starting voltage when not having electric current is about 20V (being 19V in the preferred embodiment).The secondary output of transformer 217 is by full-wave rectifier 220 and 221 (rectification circuit) rectification, and is combined as the starting output of rectification.The starting of rectification output does not have electric current when 20V is above, and provides ever-increasing electric current along with the reduction of output voltage (in the preferred embodiment up to about 85-90A).Output 211 is connected to the starting output that can receive rectification.Rectifier also stops welding output to provide electric current in the starting circuit that comprises transformer and starting winding.
Starting output also is the hot exposure output of contact start.When welding process with contact start (short circuit) when starting, extra current is provided, thereby hot exposure can be provided.
In the preferred embodiment, welding winding and starting winding are the parts with single generator (rotating shaft) of independent rotor, stator (output winding) and Exciting Windings for Transverse Differential Protection (field winding).But, in the embodiment of alternative, two generators (two axles) can be arranged, perhaps a rotor and two Exciting Windings for Transverse Differential Protection have two output windings.
Can improve in a large number the present invention within the scope of the invention.Thereby should understand, a kind of method and apparatus that is used for the mechanical welding power source system that can satisfy above-mentioned purpose and advantage fully is provided according to the present invention.Although the present invention describes in conjunction with its specific embodiment, obviously, those skilled in the art will understand that many alternative arrangement, improvement and variation.Therefore, it has comprised in the aim of claims and all these alternative arrangement, improvement and variation on a large scale.
Claims (18)
1. a mechanical welding power source comprises:
One welding output winding arrangement provides a welding output, and this welding is exported in the welding scope and all had the welding V-A curve of first slope below the welding scope;
A starting output winding arrangement, the output of starting output winding arrangement is provided for one in order to reduce the transformer of voltage, the secondary output of this transformer by the rectification circuit rectification after as second output, this second is output as starting and/or hot exposure output, have the 2nd V-A curve of second slope below the welding scope, wherein second slope does not have first slope steep;
One output device is connected to and can receives the welding output and second output, and wherein this output circuit adds the welding output and second output together so that power supply output is provided.
2. power supply as claimed in claim 1, wherein said welding output winding arrangement are parts that is used to produce first rotor machine of bonding power, and starting output winding is a part that is used to produce second rotor machine of starting power.
3. power supply as claimed in claim 2, the combination of wherein said starting output winding arrangement and fairing is in parallel with welding output winding arrangement.
4. power supply as claimed in claim 1:
Wherein said welding output winding arrangement comprises welding output winding;
Described starting output winding arrangement comprises described starting output winding;
Described output device comprises output circuit.
5. power supply as claimed in claim 4 also comprises the resistance between starting output winding and this output circuit.
6. power supply as claimed in claim 4 is a little less than the coupling of the coupling ratio welding output winding of wherein said starting output winding is wanted.
7. power supply as claimed in claim 6, wherein said welding output winding is the part of first generator, and starting output winding is the part of second generator.
8. power supply as claimed in claim 7, the combination of wherein said starting output winding and rectification circuit is in parallel with welding output winding.
9. power supply as claimed in claim 4, wherein said welding output winding is the part of first generator, and starting output winding is the part of first generator.
10. a mechanical welding power source comprises:
One welding output winding arrangement provides a welding output;
A starting output winding arrangement, the output of starting output winding are provided for one in order to reducing the transformer of voltage, the secondary output of this transformer by the rectification circuit rectification after as second output, this second is output as starting and/or hot exposure output;
One output device is connected to and can receives the welding output and second output, and wherein this output circuit adds the welding output and second output together so that power supply output is provided, and wherein this power supply output has a break at the threshold value place of welding scope bottom.
11. power supply as claimed in claim 10, wherein:
Welding output winding arrangement is a part that is used to provide first TRT of bonding power, and starting output winding arrangement is a part that is used to provide second TRT of starting power; And
Wherein the combination of starting output winding arrangement and fairing is in parallel with welding output winding arrangement.
12. power supply as claimed in claim 10, wherein said welding output winding arrangement comprises welding output winding;
Described starting output winding arrangement comprises described starting output winding;
Described output device comprises output circuit.
13. power supply as claimed in claim 12, wherein:
A little less than the coupling of the coupling ratio welding output winding of starting output winding is wanted;
Welding output winding is the part of first generator, and starting output winding is the part of second generator; And
Wherein the combination of starting output winding and rectification circuit is in parallel with welding output winding.
14. a method that is used to provide bonding power output comprises:
Produce bonding power by the welding winding, wherein bonding power is in the welding scope and have the welding V-A curve of first slope below the welding scope;
By the starting output winding of connection successively, in order to reduce transformer, the rectification circuit of voltage, produce a secondary power, this secondary power has the 2nd V-A curve of second slope below the welding scope, and wherein second slope does not have first slope steep; Described secondary power is starting power and/or hot exposure power;
Bonding power and secondary power are added together so that bonding power output to be provided.
15. method as claimed in claim 14 also comprises by an impedance secondary power is provided.
16. method as claimed in claim 14 wherein produces secondary power and comprises the power that produces the impedance restriction.
17. method as claimed in claim 16 wherein produces bonding power and comprises that rotation first generator and generation secondary power comprise rotation second generator.
18. one kind is used to provide the method for bonding power output to comprise:
One welding output winding produces a bonding power;
A starting output winding, the output of starting output winding is provided for one in order to reduce the transformer of voltage, and the secondary output of this transformer produces a secondary power by the rectification circuit rectification; Described secondary power is starting power and/or hot exposure power;
Bonding power and secondary power are added together so that bonding power output to be provided, and this welding output threshold value place bottom the welding scope has a break.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/711,814 | 2000-11-13 | ||
| US09/711,814 US6479794B1 (en) | 2000-11-03 | 2000-11-13 | Engine driven welding power supply with dig circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1397400A CN1397400A (en) | 2003-02-19 |
| CN100361772C true CN100361772C (en) | 2008-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011344385A Expired - Lifetime CN100361772C (en) | 2000-11-13 | 2001-11-02 | Mechanical welding power source with starting circuit |
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| Country | Link |
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| CN (1) | CN100361772C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10071435B2 (en) * | 2016-05-13 | 2018-09-11 | Lincoln Global, Inc. | Welder-generator with start-stop |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049946A (en) * | 1975-11-03 | 1977-09-20 | Eutectic Corporation | Power supply for electric arc welding |
| JPS58141857A (en) * | 1982-02-19 | 1983-08-23 | Hitachi Seiko Ltd | Plasma arc generating device serving also as tig welding |
| US4918285A (en) * | 1988-06-09 | 1990-04-17 | Cyclomatic Industries, Inc. | System for supplying power |
| US4999563A (en) * | 1989-02-14 | 1991-03-12 | Sawafui Electric Co., Ltd. | Separately power-feeding welding generator |
| CN2099698U (en) * | 1991-06-25 | 1992-03-25 | 湖南省湘潭市大众整流电器厂 | Safety and energy-saving rectification apparatus for mine traction locomotive |
| CN1087043A (en) * | 1992-08-25 | 1994-05-25 | 松下电器产业株式会社 | Arc welder and CUT |
| US5734147A (en) * | 1995-09-08 | 1998-03-31 | Illinois Tool Works Inc. | Method and apparatus for electronically controlling the output of an engine driven generator welding power supply |
-
2001
- 2001-11-02 CN CNB011344385A patent/CN100361772C/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049946A (en) * | 1975-11-03 | 1977-09-20 | Eutectic Corporation | Power supply for electric arc welding |
| JPS58141857A (en) * | 1982-02-19 | 1983-08-23 | Hitachi Seiko Ltd | Plasma arc generating device serving also as tig welding |
| US4918285A (en) * | 1988-06-09 | 1990-04-17 | Cyclomatic Industries, Inc. | System for supplying power |
| US4999563A (en) * | 1989-02-14 | 1991-03-12 | Sawafui Electric Co., Ltd. | Separately power-feeding welding generator |
| CN2099698U (en) * | 1991-06-25 | 1992-03-25 | 湖南省湘潭市大众整流电器厂 | Safety and energy-saving rectification apparatus for mine traction locomotive |
| CN1087043A (en) * | 1992-08-25 | 1994-05-25 | 松下电器产业株式会社 | Arc welder and CUT |
| US5734147A (en) * | 1995-09-08 | 1998-03-31 | Illinois Tool Works Inc. | Method and apparatus for electronically controlling the output of an engine driven generator welding power supply |
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| Publication number | Publication date |
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| CN1397400A (en) | 2003-02-19 |
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Granted publication date: 20080116 |