CN1043744C - Three phases sysmetrical taps rectifying are welder - Google Patents
Three phases sysmetrical taps rectifying are welder Download PDFInfo
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- CN1043744C CN1043744C CN 90106166 CN90106166A CN1043744C CN 1043744 C CN1043744 C CN 1043744C CN 90106166 CN90106166 CN 90106166 CN 90106166 A CN90106166 A CN 90106166A CN 1043744 C CN1043744 C CN 1043744C
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Abstract
The present invention relates to a three-phase symmetrical tap rectifying arc welder having a steep descent output external characteristic. The present invention is mainly used for manual electric arc weld and is characterized in that three tap arc welding transformers with the same parameter replace an integral three-phase transformer. The primary coupling degree of the three transformers can be adjusted by the mode of switching primary taps of the transformers. An output current adjustment range is enlarged by a particular primary star triangle switching method. The welder has the characteristics of small size, light weight, low noise, stable current, low cost, easy manufacture and repair, electric energy saving, good welding technological performance, etc.
Description
The present invention is relevant with arc welding, and is especially relevant with the rectifier type dc welding machine.
Tapped ac arc wedling machine has obtained to use widely at industrial circle, in fact it is a step-down transformer that leakage reactance can be regulated, the general iron Job's tears that adopts square shape two stem forms, primary coil is divided into two parts, a part and secondary coil are on same stem, another part is alone on another stem, two parts all have the tap of some, can change the effective turn configuration of elementary winding on two stems with switch changing-over tap, change the coupling degree of primary and secondary, thereby obtained different secondary output currents.
But the principle of tapped arc-welding machine is not used widely on the three phase rectifier arc-welding machine of dropping characteristic requiring, its reason is the three-phase transformer that general rectifier arc welder all adopts integral type, the three-phase core limb of limited length is only arranged, even the primary coil of same phase is placed the two ends of same core limb.Certain distance is left in the centre, also is difficult to obtain the required minimum current of manual arc welding, if core limb is elongated the degree that can compare with three-phase moving-coil type rectifier arc welder, will be very uneconomical then, has both wasted iron and has also wasted copper.
It is little to the purpose of this invention is to provide a kind of volume, in light weight, and noise is low, and current stabilization can obtain manual arc and weld required minimum current, and cost is low, easily makes the three-phase symmetrical taps formula rectifier arc welder of easily repairing.
The present invention is achieved in that
The utility model three-phase symmetrical taps formula rectifier arc welder, form by three-phase tapped transformer and three-phase bridge-type rectifier and three-phase change-over switch, transformer core is square shape two stem formulas, elementary main winding is on a radical center post of iron core, elementary auxilliary winding and secondary windings are on another radical center post, elementary master, auxilliary winding has corresponding tap to connect with the corresponding contact that three coaxial adjusted in concert taps connect switch, the brace that tap connects switch slidably and respectively connects corresponding contact, receive the input of three-phase bridge rectifier ZL after connecting with delta connection or star connection between the secondary windings, wherein:
(1) the three-phase tapped transformer is made up of three parameter bin single-phase tapped transformer together;
(2) elementary main winding end points is connected with one group of fixed contact of three-phase change-over switch respectively, another group fixed contact of three-phase change-over switch is connected with the three-phase of three phase mains respectively, another end points of elementary main winding and tap thereof are connected switch with tap sliding contact connects, two end points of elementary auxiliary winding are connected with the movable contact of three-phase change-over switch respectively, the tap of auxiliary winding is connected the switch sliding contact respectively and connects with tap, one group of movable contact of three-phase change-over switch is connected, so that the elementary winding of three-phase tapped transformer is a delta connection, another group movable contact of three-phase change-over switch is connected, so that the elementary winding of three-phase tapped transformer is a star connection.
Characteristics of the present invention are three symmetrical and tapped.Electric welding machine constructed in accordance with the principles of the present invention has that volume is little, in light weight, noise is low, current stabilization, cost are low, easily make advantages such as Yi Xiu.
Following is accompanying drawing of the present invention.
Fig. 1 is circuit theory diagrams of the present invention.
Following is embodiments of the invention:
The present invention adopts three separate single-phase transformer B1, B2, B3 replaces the three-phase transformer of integral type, from left to right can be divided into four parts among Fig. 1, first is a star-triangle change-over switch KZ, and second portion is three transformer B1, B2, elementary and the tap separately of B3 connects K switch DH1,2,3, and third part is the secondary of connection triangular in shape, the three-phase bridge rectifier group ZL that the 4th part is made up of six diode D1-D6.Three symmetrical for making, the parameter of three transformers is identical, and three taps connect the switch adjusted in concert.Three transformer are divided into two parts.That part of number of turn in dotted line top is less to be called auxiliary winding and secondary coil with on a radical center post, and the more main winding that is called of the dotted line that part of umber of turn in below is separately on a radical center post.Compare with the three-phase transformer of integral type, the iron circuit of each single-phase transformer is long two ends that do not wind the line up and down, and the primary and secondary coil is to be placed on two stems basically, mutually even summation pine, leakage reactance is bigger, can obtain the required low value welding current of manual arc welding.
Star triangle change-over switch KZ is actually one six double-pole double throw switch, when the position of six plug-in strips as shown in Figure 1 the time, the elementary winding of three transformers constitutes delta connection and is connected on the three phase mains, power line voltage is added in main winding left end and auxiliary winding right-hand member, two windings produce the flow direction unanimity, be equivalent to the forward series connection, when tap connect K switch DH1, when 2,3 brace is in the least significant, auxiliary winding is all on the shelf, primary and secondary respectively accounts for a side stem, the leakage reactance maximum, the output current minimum.When the brace of switch was moved to the left successively, the number of turn that auxiliary winding comes into operation increased successively, and leakage reactance reduces successively.Output current increases successively.When brace was in leftmost position, auxiliary winding all came into operation, and the then idle number of turn of main winding is maximum, leakage reactance minimum, output current maximum.Because KDH1,2, the 3rd, adjusted in concert, the electric current of each transformer secondary output output equates, is transported to three-phase bridge rectifier after connection is synthesized through triangle, output is for welding after the rectification.
Should be understood that in this case no matter brace moves to any position, primary coil always has certain number of turn idle.If will enlarge the output current adjustable range, the idle shared proportion of the number of turn will increase, and in order to export the minimum current that meets the requirements, the number of turn of coil is abundant, and this certainly will will increase the copper consumption of welding machine, is very uneconomic.The present invention adopts the method for special elementary star triangle changing-over, is intended to solve this contradiction.
In order to export the little electric current that meets the requirements, six plug-in strips of six double-pole double throw switches are pulled the below, as making the elementary winding of three-phase tapped transformer become star connection during dotted line position among Fig. 1, this moment, the phase voltage of power supply was added in the left end of main winding and the left end of auxiliary winding, be equivalent to two around anti-phase series connection, the flow direction that produces is opposite, is cancelled a part.The present invention is designed to 1.732: 0.732 with two umber of turns ratio, be kept to 1.732-0.732=1 mutually, and be the ratio of three-phase power line voltage and phase voltage at 1.732: 1, therefore, though when being added in voltage on elementary this moment alive 1/1.732 only by delta connection, but it is constant that the every circle of coil bears voltage, secondary output floating voltage is also just constant, works as KDH1,2, when 3 brace was mobile successively from left to right, the number of turn that auxiliary winding comes into operation increased successively, leakage reactance increases successively, also big when all splitting than primary and secondary is complete, when brace moved to rightmost, main winding and auxiliary winding all came into operation, the leakage reactance maximum, the output current minimum.Adopt such method, can under the prerequisite that does not increase the idle number of turn of winding,, relax the contradiction of transformer copper consumption and electric current adjustable range effectively one times of zone of welding current enlarged proximal.
The mode that three transformer secondary outputs are coupled to each other can be a delta connection, can be spider also, require the number of turn more during delta connection, but conductor cross-section can be less, and during star connection, the number of turn is less, but that conductor cross-section requires is bigger.
Establish sweet welding machine because secondary for three-phase bridge rectification according to the present invention; ripple factor is less; do not add direct current reactor and can meet the requirement of GB8118-87 about the rectification output waveform, but as for improving the dynamic characteristic direct current reactor of in DC loop, connecting, also belong to the scope of protection of the present invention.
Claims (1)
1, three-phase symmetrical taps formula rectifier arc welder, form by three-phase tapped transformer and three-phase bridge-type rectifier and three-phase change-over switch, transformer core is square shape two stem formulas, elementary main winding is on a radical center post of iron core, elementary auxilliary winding and secondary windings are on another radical center post, elementary master, auxilliary winding has corresponding tap to connect with the corresponding contact that three coaxial adjusted in concert taps connect switch, the brace that tap connects switch slidably and respectively connects corresponding contact, to receive the input of three-phase bridge rectifier (ZL) after delta connection or the star connection connection, it is characterized in that between the secondary windings:
(1) the three-phase tap transformer is made up of three identical single-phase tapped transformers (B1, B2, B3) of parameter;
(2) elementary main winding (a1, a2, an end points (21 a3), 25,29) respectively with one group of fixed contact (5,11 of three-phase change-over switch (KZ), 17) connect another group fixed contact (2,8 of three-phase change-over switch (KZ), 14) (A, B C) are connected with the three-phase of three phase mains respectively, another end points of elementary main winding (22,26,30) and tap thereof are connected switch with tap sliding contact connects, elementary auxiliary winding (b1, b2, two end points (19 and 20 b3), 23 and 24,27 and 28) respectively with the movable contact (3,1,9 of three-phase change-over switch (KZ), 7,15,13) connect, the tap of auxiliary winding is connected the switch sliding contact respectively and connects with tap, one group of movable contact (1 and 16 of three-phase change-over switch (KZ), 4 and 7,10 and 13) be connected, so that the elementary winding of three-phase tapped transformer is a delta connection, another group movable contact (6 of three-phase change-over switch, 12,18) be connected, so that the elementary winding of three-phase tapped transformer is a star connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106166 CN1043744C (en) | 1990-10-22 | 1990-10-22 | Three phases sysmetrical taps rectifying are welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106166 CN1043744C (en) | 1990-10-22 | 1990-10-22 | Three phases sysmetrical taps rectifying are welder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051876A CN1051876A (en) | 1991-06-05 |
| CN1043744C true CN1043744C (en) | 1999-06-23 |
Family
ID=4879863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106166 Expired - Fee Related CN1043744C (en) | 1990-10-22 | 1990-10-22 | Three phases sysmetrical taps rectifying are welder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043744C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4383545A1 (en) * | 2022-12-05 | 2024-06-12 | Huawei Digital Power Technologies Co., Ltd. | Power supply apparatus, three-phase transformer circuit, and charging pile |
| EP4383546A1 (en) * | 2022-12-05 | 2024-06-12 | Huawei Digital Power Technologies Co., Ltd. | Power supply apparatus, three-phase transformer circuit, and charging pile |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2765698B1 (en) * | 2013-02-06 | 2018-10-24 | Siemens Aktiengesellschaft | Assembly for igniting thin rods made of electrically conductive material, in particular thin silicon rods |
-
1990
- 1990-10-22 CN CN 90106166 patent/CN1043744C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4383545A1 (en) * | 2022-12-05 | 2024-06-12 | Huawei Digital Power Technologies Co., Ltd. | Power supply apparatus, three-phase transformer circuit, and charging pile |
| EP4383546A1 (en) * | 2022-12-05 | 2024-06-12 | Huawei Digital Power Technologies Co., Ltd. | Power supply apparatus, three-phase transformer circuit, and charging pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051876A (en) | 1991-06-05 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |