CN2036462U

CN2036462U - Parallel-combined arc-weld power supply

Info

Publication number: CN2036462U
Application number: CN 88207107
Authority: CN
Inventors: 沈培湘
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-06-12
Filing date: 1988-06-12
Publication date: 1989-04-26

Abstract

The utility model relates to a combined parallel type arc welding power supply which can be used as an arc welding power supply of manual arc welding and submerged arc welding, and the utility model belongs to a reinforced magnetic leakage type arc welding power supply with common moving coil type, moving iron type and pig tail type arc welding power supplies. The method that a switch energizes each primary sub coil according to different combined modes to change leakage reactance (change internal resistance at the same time) is used by the power supply for adjusting the welding current. The utility model overcomes the defects of large vibration, large noise, large abrasion, large indicating error, small capacity, few sub-barriers, etc. in the prior art and has the advantages of energy saving, material saving, good dynamic performance, easy manufacturing, easy repair, etc.

Description

Parallel-combined arc-weld power supply

The present invention relates to the critical piece of arc-welding machine---Arc Welding Power, especially about strengthening a kind of new solution that magnetic-leakage type also claims the mechanically controlled type Arc Welding Power.

In the prior art, strengthen the magnetic-leakage type Arc Welding Power and be broadly divided into three classes: be i.e. moving-iron type, moving-coil type and tapped.Relevant with the present invention is tapped Arc Welding Power, tapped Arc Welding Power is the some taps that utilize the elementary winding of its arc welding transformer, regulating different series systems with switch realizes welding the adjusting of electric current, because tapped Arc Welding Power does not have mechanically operated movement parts, thereby in light weight, vibrate for a short time, noise is low, arc stability is better, is widely used in portable arc welding machine.But because the designing requirement of tapped Arc Welding Power: the tap of elementary winding and corresponding switch contact thereof will be by whole primary currents, and the right quantity of switch contact equals to transfer stream shelves number, and the tap number of elementary winding is roughly the twice of transferring stream shelves number.The synthesis result of these factors, the capacity, the accent that have restricted and limited tapped Arc Welding Power flow width, fineness and cyclic duration factor, the birth defects of tapped Arc Welding Power existence that Here it is.

It is more approaching that Patent Office of the People's Republic of China (PRC) disclosed name on February 17th, 1 is called " the big tapped ac arc wedling machine of capacity " application for a patent for invention mentioned arc-welding machine and the present invention.This invention is that the elementary winding with arc welding transformer is divided into two sub-coils, and respectively on two stem stems of degree of lip-rounding transformer core, and sub-coil outside is wound with secondary windings therein; Two sub-coils of elementary winding are drawn some taps respectively, are connected in series through some contacts to corresponding with it rheotrope.Principle according to changing elementary winding and secondary windings coupling degree of tightness obtains the big current gear of 3-5; According to " winding extension " principle, obtain 2-4 intermediate current shelves and, obtain the little value current gear of 4-6 according to " contrast is excitatory " principle, it is 315A that the capacity that has 12 grades of electric currents to regulate is provided, 400A, the tapped arc-welding machine of 500A newly designs.But, a plurality of taps that tapped arc-welding machine utilizes the elementary winding of arc welding transformer are not still broken away from this design, with the Design Mode of transferring stream switch series uniting and adjustment joint mode, still there are following three problems: one, transfer 12 grades on stream switch, 12 pairs of contacts require the current capacity of every pair of contact all must equate that the current capacity of the disclosed switch contact of this specification is 100A with whole primary currents of elementary winding, and the interlocking of every pair of contact palpus promptly can not allow wantonly two pairs of contacts to connect simultaneously.Such accent stream switch is made difficulty, and economy is also poor; Two, in the primary coil of tens Ampere currents capacity, extract 20 taps out, be not easy to make and maintenance; Three, during rated condition, elementary the vacancy rate that promptly is commonly called as reaches 70% without the ratio of the total ampere-turn of coil with the total ampere-turn of elementary use coil, and winding utilization is not high, and it is economical that design is owed.

The present invention is directed to the above-mentioned deficiency of prior art, provide a kind of neither moving-iron type, moving-coil type, the new design of also non-tapped combined parallel power supply for arc welding.This Arc Welding Power has energy-conservation, good welding performance, and material is economized, cost is low, and volume is little, and is in light weight, easily make advantages such as Yi Xiu, can be used as the Arc Welding Power of manual metal-arc welding, submerged-arc welding, AC arc welding, direct-current arc welding and alternating current (AC) and direct current (DC) arc welding machine, very wide range of application is arranged.

Main points of the present invention are: by at the beginning of, secondary isolated main transformer, electric current adjusting and indicating device and the Arc Welding Power of forming according to different attachment devices that increase of kind etc., wherein said main transformer, its every mutually elementary winding has 3 at least rated voltage is identical but sub-coil that leakage reactance is different, be connected in parallel with different compound modes and same power supply through regulating current device, every phase secondary windings has 2 at least rated current is identical but sub-coil that leakage reactance is different is composed in series, every mutually at the beginning of, secondary sub-coil adopts the overlapping formula to arrange, be placed on the same iron core, on arbitrary iron core column at the beginning of, secondary sub-coil sum is no less than 3.Described main transformer can be a single-phase main transformer or the three-phase transformer group that is made of three single-phase main transformers, its elementary sub-coil I ₁, I ₂, I ₃, I ₄, I ₅The independent ratio of energising operating current and rated current is roughly respectively: 0.2,0.23,0.26,0.3,0.39, and secondary sub-coil II ₁, II ₂, II ₃The ratio of the number of turn and secondary total number of turns, be roughly respectively: (0.04～0.12), (0.24～0.32), (0.6～0.7) can also be three-phase main transformers.Described regulating current device can be a LW type universal seclector, also can be KDH type special welding machine switch, A.C. contactor and other switch such as control device, electronic AC switch thereof.Described attachment device can comprise devices such as diode rectification device, blower fan, out put reactor, secondary current adjusting device.

To contrast accompanying drawing below, principle of the present invention and embodiment will be further described below:

Accompanying drawing 1a is a basic principle conspectus of the present invention;

Accompanying drawing 1b is a kind of schematic diagram of each sub-coil arrangement position of main transformer of the present invention;

Accompanying drawing 2 is the present invention's electrical schematic diagrams as arc welding rectifier, can be used as one of embodiment of the invention.

Referring to accompanying drawing 1a, 1b, in order to illustrate principle, be convenient to narration, accompanying drawing 1 has been selected the circuit structure of as far as possible simplifying, main transformer B for use ₁, its elementary winding I has 5 sub-coil I ₁-I ₅, the identical and leakage reactance difference of their rated voltage, the secondary windings II has 3 sub-coil II ₁-II ₃, the identical and leakage reactance difference of their rated current, all elementary sub-coil I ₁-I ₅End of the same name each contact 1S through rheotrope 1S is respectively arranged ₁-1S ₅Be connected with same power supply one input a, another end tandem of the same name is in another power input d of same power supply; Secondary each sub-coil II ₁-II ₃The different name end links to each other to be and is connected in series.Primary and secondary each sub-coil adopts folded array, be placed on the same iron core T, accompanying drawing 1b is to be example with the square shape iron core, primary and secondary each sub-coil difference folded array is on two stem stems of iron core T, primary and secondary sub-coil sum is no less than 3 on arbitrary stem stem, among the figure, 3 elementary sub-coil I are arranged on the stem stem of the left side ₁, I ₄And I ₂, 2 secondary sub-coil II ₁, II ₂, and secondary sub-coil II ₁Be arranged in elementary sub-coil I ₁With I ₄Between, secondary sub-coil II ₂Be arranged in elementary sub-coil I ₄With I ₂Between; On the stem stem of the right, 2 elementary sub-coil I are arranged ₃And I ₅, 1 secondary sub-coil II ₃, and secondary sub-coil II ₃Be arranged in two elementary sub-coil I ₃And I ₅Between.Elementary sub-coil I ₁, I ₂, I ₃, I ₄, I ₅The independent ratio of energising operating current and rated current is roughly respectively: 0.2,0.23,0.26,0.3,0.39, and secondary sub-coil II ₁, II ₂, II ₃The ratio of the number of turn and secondary total number of turns, be roughly respectively: (0.04～0.12), (0.24～0.32), (0.6～0.7).

Because elementary each sub-coil is connected in parallel, 5 elementary sub-coils just have 31 kinds of different combination step modes, can access 31 grades of electric currents, therefrom can select 11～23 kinds as transferring stream to use.When rated condition, elementary each sub-coil is often can be all in parallel to be used, and so just makes idlely than may diminish to zero, and at this moment accent flows all contact 1S of switch 1S ₁～1S ₅The electric current sum of passing through equals elementary rated current, and for each contact 1Si, its current capacity is less demanding, resembles LW ₅-16 universal seclectors one class regular tap just is easy to satisfy instructions for use.On the other hand,, during gear shift, and do not require that it can " break-before-make " for the contact 1Si that transfers stream switch 1S, promptly needn't interlocking, so just easily realize original maximum positioning several 12 is increased to 16 or 20 or 24 grades, make it to reach and transfer the requirement of flowing width and fineness; Because each primary and secondary sub-coil of every phase adopts folded array to be placed on the same iron core T, and have 3 primary and secondary sub-coils on arbitrary iron core column at least, when transferring stream, magnetic potential balance group number can change (n 〉=4) on two stem stems between 1～n, magnetic potential balance group number is more, the employing coil turn is many, and core section is little, the long little way of average turn, and volume, weight, the cost of Arc Welding Power are all descended; Because when regulating leakage reactance, the internal resistance of power supply also is conditioned, make that the electromagnet inertia of the interior power supply of whole accent stream scope is all less.

Referring to accompanying drawing 2, this figure discloses the first embodiment of the present invention as arc welding rectifier.Among the figure, main transformer B ₁By three single-phase main transformer B as shown in Figure 1 ₁Constitute the three-phase transformer group, transfer stream switch 1S LW ₅-16 /8, location number are 16, one of them orientation amputate power supply, and as power switch usefulness, all the other 15 location are in three-phase primary sub-coil I _A, I _B, I _CIn choose 15 kinds of different combination parallel waies symmetrically, provide 15 grades to transfer stream to use.Above-mentioned simple formation can make product reach performance indications such as quiet external characteristics in the countries concerned's standard, the professional standard, dynamic characteristic.Because arc welding rectifier it is essential and make welding performance make the welder satisfied that for this reason, accompanying drawing 2 has increased out put reactor DK again, push current and electric current fine tuning part.Push current and electric current fine tuning are by same LW ₅-16M /2 transfer stream switch 2S to regulate ZL ₁Be main output three-phase bridge-type rectifier, ZL ₂Be fine tuning electric current bridge-type rectifier, ZL ₃Be the push current fairing.

Embodiments of the invention not only limit to accompanying drawing 1, accompanying drawing 2 disclosed examples; according to principle of the present invention; the Arc Welding Power that can relate to other variety classes, specification; for example: make primary current with combined parallel of the present invention and regulate; secondary current is regulated can remain combined parallel; also can be other form Arc Welding Powers such as magnetic amplifier, magnetic saturation type, SCR type, tapped, moving-iron type, protection scope of the present invention be as the criterion with claim.

Claims

1, combined parallel power supply for arc welding is formed by primary and secondary isolated main transformer, electric current adjusting and indicating device and according to different attachment devices that increase of kind etc., it is characterized in that: described main transformer B ₁Its every mutually elementary winding I has 3 at least rated voltage is identical but sub-coil Ii (i 〉=3) that leakage reactance is different is connected in parallel with different compound modes and same power supply through regulating current device 1S, every phase secondary windings II has 2 at least rated current is identical but sub-coil II i (i 〉=2) that leakage reactance is different is composed in series, every mutually primary and secondary sub-coil I i, II i adopt the overlapping formula to arrange, be placed on the same iron core T, primary and secondary sub-coil I i, II i sum are no less than 3 on arbitrary iron core column.

2, according to the described Arc Welding Power of claim 1, it is characterized in that: described main transformer B ₁, can be a single-phase main transformer or by three single-phase main transformer B _1A, B _1B, B _1CThe three-phase transformer group that constitutes, its elementary sub-coil I ₁, I ₂, I ₃, I ₄, I ₅The independent ratio of energising operating current and rated current is roughly respectively: 0.2,0.23,0.26,0.3,0.39, and secondary sub-coil II ₁, II ₂, II ₃The ratio of the number of turn and secondary total number of turns, be roughly respectively: (0.04～0.12), (0.24～0.32), (0.6～0.7) can also be a three-phase main transformer.

3, according to the described Arc Welding Power of claim 1, it is characterized in that: described regulating current device 1S can be a LW type universal seclector, also can be KDH type special welding machine switch, A.C. contactor and other switch such as control device, electronic AC switch thereof.

4, according to claim 1,2,3 described Arc Welding Powers, it is characterized in that: described attachment device can comprise devices such as diode rectification device ZL, blower fan D, out put reactor DK, secondary current adjusting device 2S.