CN2246844Y - New single-phase 220V AC arc welding transformer - Google Patents

Abstract

The utility model relates to a new single-phase 220V AC arc welding transformer, which adopts the mode of positive feedback and automatic compensation for magnetic potential, and three windings are connected in series into a primary winding. A secondary winding is composed of the connection in parallel of two thick and one thin windings. A tap of a set of primary winding can control the output voltage of the secondary winding; current adjusting devices are respectively connected in series with the two thick windings of the secondary winding. The utility model has the advantages of electrical energy saving, high power factor, small volume, light weight, etc. Compared with a conventional transformer, the no-load power consumption can be decreased by 90%. The utility model can also carry out AC arc welding and can be used as an automatic charger.

Description

Novel single-phase 220 volts of alternating current arc welding transformers

The utility model relates to AC arc welding power source, particularly electromagnetic compensation formula alternating current arc welding transformer.

At present, the power supply of ac arc wedling machine has two kinds of controllable silicon formula and electromagnetic types.Though advantages such as controllable silicon formula arc welder has high efficiency, energy consumption is little, volume is little and in light weight also exist shortcomings such as cost height, poor reliability and maintenance difficulty are big.The electromagnetic type arc welder is divided into: moving-iron type, consubstantiality formula and moving-coil type.Low, the good reliability of the cost of electromagnetic type arc welder, but operating efficiency is not high, energy consumption is big, and heaviness very.The above-mentioned shortcoming of the electromagnetic type arc welder mainly magnetic flux leakage theory of its power transformer employing causes, and overcome above-mentioned shortcoming, will improve its electromagnetic structure.

The purpose of this utility model is to provide a kind of and adopts positive feedback to compensate novel single-phase 220 volts of magnetic potential automatically tappedly to have level to transfer a stream alternating current arc welding transformer, and then reaches energy-conservation, multi-functional, improves welding performance, reduces the purpose of volume and weight.

Architectural feature of the present utility model is as follows: three windings are wound on respectively on three magnetic core cylinders of day font iron core, form two limit windings and a middle winding, described three windings are according to the order of limit winding, middle winding, by two is end of the same name, connect for the mode of different name end for the 3rd, constitute elementary winding.Wherein be respectively arranged with the tap of two groups of correspondences between two limit windings, a multistage change over switch is connected the scalable secondary output voltage with above-mentioned tap.Secondary is that two thick one thin three windings compose in parallel, and presses thin winding interior, and thick winding order outside is wound on the above-mentioned middle winding outside successively, and above-mentioned two thick windings are parallel coiling.In secondary two thick windings, be serially connected with respectively and transfer the stream device.

This device is in order more to help the heat radiation of winding, and with the trapezoidal coiling of limit winding, and sectional area can be thinner, with the coiling of middle winding rectangle.Also be connected to voltage dial gauge and bridge rectifier at two outputs of secondary winding, the output of this bridge rectifier is the dc output end of arc welding transformer.

Above-mentioned accent stream device can adopt one-way SCR, in the output of secondary thick winding W4, W5, is connected in series one-way SCR CRT3, CRT4 respectively.Between the negative electrode of CRT3 and trigger electrode, be connected to serial connection branch road and forward diode D1 who forms by the winding W7 among forward diode D2, the resistance R 1 transformer B4 respectively, between the negative electrode of CRT4 and trigger electrode respectively by the series arm of forming by the winding W8 among forward diode D3, resistance R 4, the transformer B4 and a forward diode D4.Between the output of secondary two thick windings, be connected to two capacitor C 2, C3.Between the dc power output end of forming by bridge rectifier and transformer B5, be connected to: a voltage stabilizing didoe D5; Moving contact 1, the potentiometer W1, the W2 that join respectively with change over switch fixed contact 2,3 by change over switch K1, the resistance R 3 of joining with potentiometer W1, the W2 other end, capacitor C 4 branch roads that join with resistance R 3 other ends; By the winding W9 series arm among two base stages, resistance R 2 and the transformer B4 of double base diode BZ1.The union end of the emitter of above-mentioned double base diode and described resistance R 3 and capacitor C 4 joins.Above-mentioned potentiometer W1 is arranged on the arc welder, and potentiometer W2 is arranged on the handgrip pincers of arc welder, and change over switch K1 can select to transfer the potentiometer of stream.

Above-mentioned accent stream device can adopt bidirectional triode thyristor, at two secondary thick winding W4, be connected in series two bidirectional triode thyristor SCR1 respectively in the output of W5, SCR2, two bidirectional triode thyristor SCR1, the trigger end of SCR2 respectively with two bidirectional diode DZ1, the end of DZ2 joins, two bidirectional diode DZ1, the other end of DZ2 is respectively by capacitor C 1, C2 and above-mentioned two secondary thick winding W4, another output of W5 joins, above-mentioned two bidirectional diode DZ1, the other end of DZ2 also joins with the moving contact 1 of change over switch K1, two fixed contacts 2 of change over switch, 3 respectively by potentiometer W1, W2 and resistance R one end join, and the output that is connected to bidirectional triode thyristor of the other end of R and above-mentioned secondary thick winding W5 joins.

Above-mentioned accent stream device also can adopt magnetic amplifier control to transfer stream.

This device also can have charge function, on above-mentioned secondary outlet line, can be connected in series an electric current mutual inductance device L, and the two ends of this current transformer L are connected to stream electric controller 1, and this charge controller 1 is the general electronics charge controller in the common charger.In the thin winding of secondary coil, be connected to a charge switch K2, charge switch has the switching two states, when charging; K switch 2 disconnects thin winding, when welding, connects thin winding.In the accent stream device of secondary thick winding W4, be connected to a relay contact J1 between the fixed contact 1 of bidirectional diode and K switch 1 by charge controller control, when it is connected, be two secondary coil outputs, when it disconnects, be a secondary coil output, can reduce charging current.

The utility model is exported big electric current at secondary winding, under the situation that voltage reduces, the limit winding can be born all the other voltages of power supply, but the magnetic flux of its generation is at output winding interlinkage, and be two magnetic flux sums that the limit winding is produced, the magnetic flux that middle winding self is produced again interlinkage in output winding.So the secondary winding electric current is big more, the magnetic flux that the limit winding produces is also big more, and the output voltage of secondary winding is also increased; This positive feedback effect makes this transformer fe core volume very little, but can obtain very big power output.Owing to adopt the output in parallel of the winding of three different cross-sectional, increased the winding area, reduced umber of turn, can reduce its output internal resistance and output reactance, increase welding current.Inferior group of thin winding can provide arcing voltage when two inclined to one side heavy gauge wire winding currents are zero, also exportable less welding current guarantees the ditty flow point of welding machine.

The utility model is compared with traditional electromagnetism transformer of arc welder, has following advantage:

1. because primary coil is divided into rational three sections, so coil turn can be more, no-load current only is 1/10th of a traditional electromagnetic type arc welder, and power savings is obvious.

2. the volume of this device is very little, very light in weight.

3. the self-heating phenomenon is not serious, is furnished with air cooling equipment again, and its actual load factor has improved many than 20%.

4. because floating voltage guarantees striking, and that electric current can transfer to is very little, therefore, can carry out 0.5 millimeter welding with upper thin sheet.

5. when line voltage was 170 volts, this device is work as usual; This device has the function that reduces line voltage, can satisfy some and require special occasions high-power, the low voltage operating load to use.

6. this device also has the function of charger and DC welder.

7. the starting the arc is fast, does not need to add the high-frequency electronic arc starter again.

The drawing explanation:

Fig. 1 is circuit theory diagrams of the present utility model.

Fig. 2 is that one-way SCR of the present utility model is transferred stream device electrical schematic diagram.

On day font iron core B1, B2, B3, W1, W3 are the limit winding respectively for three elementary winding W1, W2, W3 among Fig. 1, and by two groups of taps and a Multi-band switch K3 it are coupled to each other.W1 and W3 are end of the same name, and W2 is that the different name end is connected in series successively with W3, form the elementary winding of arc welding transformer, and order is 220 volts of AC power mutually.By W4, W5, three windings of W6 compose in parallel arc welding transformer time the group ac output end, wherein W4 is thin winding, W5, W6 are thick winding.The winding W2 outside during W4 is wound on, the parallel W4 outside that is wound on of W5, W6.By two bidirectional triode thyristor SCR1, SCR2 is serially connected in two secondary thick winding W6 respectively, in the output of W5, two bidirectional triode thyristor SCR1, the trigger end of SCR2 respectively with two bidirectional diode DZ1, the end of DZ2 joins, two secondary thick winding W4, another output of W5 joins, above-mentioned two bidirectional diode DZ1, the other end of DZ2 is respectively by capacitor C 1, C2 and above-mentioned two bidirectional diode DZ1, the other end of DZ2 also joins with the moving contact 1 of change over switch K1, two of change over switch K1 touches fixed 2 surely, 3 respectively by potentiometer W1, W2 and resistance R one end join, and the output that connects bidirectional triode thyristor of the other end of R and above-mentioned secondary thick winding W5 joins.Also be connected to a voltmeter U and a bridge rectifier between the ac output end of secondary winding, the output of bridge rectifier is the arc welding transformer dc output end.

Be connected to an inductance L in the outlet line of secondary thick winding W6, the two ends of inductance L link to each other with a charge controller, are connected to charging control switch K2 in an output of inferior group of thin winding, and when charging, K switch 2 disconnects.Transfer at the bidirectional triode thyristor of secondary thick winding W4 and to be connected to a relay contact J1 who is controlled by charge controller 1 between bidirectional diode DZ2 in the stream device and K switch 1 fixed contact 1.

Fig. 2 is that an one-way SCR is transferred current circuit figure.In secondary thick winding W4, output of W5, be connected in series one-way SCR CRT3, CRT4 respectively.Between the negative electrode of CRT3 and trigger electrode, be connected to serial connection branch road and forward diode D1 who forms by the winding W7 among forward diode D2, resistance R 1, the transformer B4 respectively, between the negative electrode of CRT4 and trigger electrode, be connected to series arm and forward diode D4 who forms by the winding W8 among forward diode D3, the transformer B4 respectively.Between the output of secondary two thick windings, be connected to two capacitor C 2, C3.Between the dc power output end of forming by bridge rectifier and transformer B5, be connected to: a voltage stabilizing didoe D5; Moving contact 1, change over switch fixed contact 2,3 by change over switch K1, the potentiometer W1, the W2 that join respectively with change over switch fixed contact 2,3, the resistance R 3 of joining with potentiometer W1, the W2 other end, capacitor C 4 branch roads that join with resistance R 3 other ends; One by the winding W9 series arm among double base diode, two base stages of BZ1, resistance R 2 and the transformer B4.The union end of the emitter of above-mentioned double base diode and described resistance R 3 and capacitor C 4 joins.

This device is little to the influence of electrical network, and is applied widely, also can carry out brazing, spot welding, cutting steel plate and carry out the stainless steel welding.

Claims (5)

1. novel single-phase 220 volts of alternating current arc welding transformers, it is characterized in that: three windings are wound on respectively on three magnetic core cylinders of day font iron core, form two limit windings and a middle winding, order according to two limit windings and a middle winding, by two is end of the same name, connect for the mode of different name end for the 3rd, constitute elementary winding; Above-mentioned two limit windings are connected with a multistage selector switch K3 by two groups of corresponding taps; Secondaryly composed in parallel by two thick one three thin windings, thin winding technique is the winding outside in above-mentioned, and above-mentioned two thick windings are parallel together to be wound on outside the above-mentioned thin winding; Be serially connected with in above-mentioned secondary two thick windings and transfer the stream device, be connected to voltmeter and a bridge rectifier at the output of secondary winding, the output of this bridge rectifier is the dc output end of arc welder.

2. novel single-phase 220 volts of alternating current arc welding transformers as claimed in claim 1 is characterized in that: the limit winding can trapezoidal coiling, and sectional area can be thinner, the coiling of middle winding rectangle.

3. novel single-phase 220 volts of alternating current arc welding transformers as claimed in claim 1 is characterized in that: transfer the stream device can adopt one-way SCR, in the output of secondary thick winding W4, W5, be connected in series one-way SCR CRT3, CRT4 respectively; Between the negative electrode of CRT3 and trigger electrode, be connected to serial connection branch road and forward diode D1 who forms by the winding W7 among forward diode D2, resistance R 1, the transformer B4 respectively, series arm and a forward diode D4 of between the negative electrode of CRT4 and trigger electrode, being connected to respectively, forming by the winding W8 among forward diode D3, the transformer B4; Between the output of secondary two thick windings, be connected to two capacitor C 2, C3; Between the dc power output end of forming by bridge rectifier and transformer B5, be connected to: a voltage stabilizing didoe D5; Potentiometer W1, the W2 that moving contact 1 by change over switch K1, change over switch moving contact 2,3 join respectively, the resistance R 3 of joining with potentiometer W1, the W2 other end, capacitor C 4 branch roads that join with resistance R 3 other ends; One by the winding W9 series arm among two base stages of double base diode BZ1, resistance R 2 and the transformer B4; The union end of the emitter of above-mentioned double base diode and described resistance R 3 and capacitor C 4 joins; Above-mentioned potentiometer W1 is located on the arc welder, and potentiometer W2 is located on the handgrip pincers.

4. novel single-phase 220 volts of alternating current arc welding transformers as claimed in claim 1, it is characterized in that: transfer the stream device can adopt bidirectional triode thyristor, at two extremely thick winding W4, in the output of W5, be serially connected with bidirectional triode thyristor SCR1 respectively, SCR2, two bidirectional triode thyristor SCR1, the trigger end of SCR2 respectively with two on bidirectional diode DZ1, the end of DZ2 joins, two bidirectional diode DZ1, the other end of DZ2 is respectively by capacitor C 1, C2 and above-mentioned two extremely thick winding W4, another output of W5 joins, above-mentioned two bidirectional diode DZ1, the other end of DZ2 also joins with the moving contact 1 of change over switch K1, two fixed contacts 2 of change over switch, 3 respectively by potentiometer W1, W2 and resistance R one end join, and the output that connects bidirectional triode thyristor of the other end of R and above-mentioned secondary thick winding W5 joins.

5. novel single-phase 220 volts of alternating current arc welding transformers as claimed in claim 1, it is characterized in that: on above-mentioned utmost point outlet line, can meet an electric current mutual inductance device L, the two ends of this current transformer are connected with a charge controller, in inferior superfine winding, be connected to a charge switch K2, be disconnected during charging, between the fixed contact 1 of the bidirectional diode of the accent of secondary thick winding W4 stream device and K switch 1, be connected to a relay contact J1 who controls by charge controller.

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