CN2132338Y

CN2132338Y - Single phase rectifier

Info

Publication number: CN2132338Y
Application number: CN92218356U
Authority: CN
Inventors: 顾霞萍; 戴霞龙; 陈辉; 宋秀琴
Original assignee: 顾霞萍
Priority date: 1992-07-15
Filing date: 1992-07-15
Publication date: 1993-05-05
Anticipated expiration: 2002-07-15

Abstract

The utility model discloses a single phase rectifier. The main circuit is composed of a single-phase rectifying bridge and a light reactor. The utility model also comprises an output capacitor, five contact terminals and a switch sheet. The light reactor adopts an iron core with a changeable cross-section. The single phase rectifier has the advantages of light weight and good reactance property. The single phase rectifier can be used to charge the accumulator and weld the ac / dc electric arc by being matched with the corresponding temperature-reduced transformer.

Description

Single phase rectifier

The utility model relates to the rectifier in the electro-technical field.

In existing electric welding machine, DC welder is only made direct-current arc welding usefulness, and costs an arm and a leg; AC welding set is only made AC arc welding usefulness, though both economical, can not satisfy the higher quality requirement sometimes.On a service position, often need exchange in turn to do two kinds of welding operations.At this moment, need to prepare two kinds of welding machines, and the utilance of welding machine is very low.

The purpose of this utility model is to provide a kind of single-phase rectifier of low-voltage, high-current, behind the corresponding step-down transformer of configuration, can use for charge in batteries; And main be that this rectifier meets the solder technology requirement fully, it can be neatly and AC welding set, no matter be that moving-iron type or moving-coil type hand over welding machine to match, form efficient energy-saving silicon rectifier DC welder, can replace, eliminate the high rotary DC arc welder of power consumption.

After wiring is changed easily in the outside, can make a kind of AC wave shape reshaper again, become a high-quality ac arc wedling machine.At this moment, waveform obtains to transform, and has become the alternating current that a kind of zero crossing is exceedingly fast, has removed the drawback that AC arc welding ceases arc easily.

Technical solution of the present utility model is: a kind of single-phase rectifier, its main circuit have the light-duty reactor of single-phase rectification bridge, variable cross-section iron core.Three AC terminal, two direct current binding posts, a changing-over sheet, a direct current output capacitor.

Single-phase rectification bridge is used for the reactor rectification, no matter be to exchange output or direct current output, reactor flows through direct current forever.The reactor of variable cross-section iron core along on the length of magnetic path direction, has disposed the core packet that sectional area gradually changes, and when cooperating electric current to increase, magnetic circuit enters saturation condition piecemeal, thereby improves reactance characteristic.Performance when therefore, particularly little electric current welds obviously is better than the DC arc welder of controllable silicon formula.A capacitor that is connected in parallel on dc output end has improved floating voltage significantly, arcing initiation success rate when having increased welding.

Below in conjunction with drawings and Examples, the utility model is described in further detail:

Fig. 1 is a main circuit schematic diagram of the present utility model.Changing-over sheet 8 is pressed direct current output connection among the figure

The reactor structural representation that Fig. 2 adopts for the utility model, 14 have represented cone iron core in the variable cross-section small in ends broad in the middle among the figure.

Fig. 3 is the attached method of the utility model changing-over sheet 8 when exchanging output.

Fig. 1 has described an embodiment of the present utility model to Fig. 3.

The light-duty reactor 11 of variable cross-section by aluminium matter coil 12 after insulating cylinder 13 insulation, be enclosed within on the outer garden of variable cross-section iron core 14, the variable cross-section iron core is to be wound on the steel core tube 15 outer gardens with the silicon strip that the two sides has a same slope, is assembled into one by support element 16 usefulness securing members 17.

Single-phase rectification bridge 10 is formed by four rectifier diodes connections, and it and reactor 11, shunt 4, ammeter 5, output capacitor 2 are contained in the casing together.The dc terminal of casing is equipped with positive terminal 1, negative terminals 3.The casing interchange is held AC input terminal 6 is housed, the public terminal 9 of interchange output input, and ac output end 7, and alternating current-direct current is exported the changing-over sheet 8 that is used as short circuit when changing.As Fig. 1 connection, changing-over sheet 8 short circuits 7,9 terminals, at this

moment

6,9 terminals do to exchange input, and 1,3 terminals are then done direct current output.

As Fig. 3 connection, changing-over sheet 8 short circuits 1,3 terminals, at this moment still 6,9 terminals do to exchange input, and 7,9 terminals then do to exchange output.

Bottom half dress four rolling can shift at the scene easily.

Good effect of the present utility model is to match with various AC welding sets easily at the scene, namely forms the AC and DC dual-purpose welding machine of energy-saving high welding performance, excavates and the function of having opened up the general AC welding machine, saves equipment investment, again energy savings consumption.

Claims

1, a kind of single-phase rectifier is characterized in that: its main circuit has single-phase rectification bridge, reactor, output capacitor, five binding posts and a changing-over sheet.

By the described single-phase rectifier of claim 1, it is characterized in that in five binding posts that 2, three interchange terminated lines are used, two is that the dc terminal wiring is used.

3, by the described single-phase rectifier of claim 1, it is characterized in that: the conversion connection was used when a changing-over sheet was done interchange or direct current output.

4, by the described single-phase rectifier of claim 1, it is characterized in that: the sectional area of the iron core of its reactor changes.

5, by the described single-phase rectifier of claim 1, it is characterized in that: its dc output end has connected the capacitor of a parallel connection.