CN1378895A

CN1378895A - Movable integrated AC-DC welder

Info

Publication number: CN1378895A
Application number: CN 01111194
Authority: CN
Inventors: 卢子清; 汪敦泳; 李思佳; 卢庆刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-10
Filing date: 2001-04-10
Publication date: 2002-11-13

Abstract

An integrally movable AC/DC welding machine composed of power machine and electric generator features that the permanent magnets are embedded in the flywheel of its power machine to become the rotor disk of electric generator, the stator disk, with iron core and windings of electric generator is installed opposite to the said rotor disk, and the alternate current generated by the electric generator is rectified to become the direct current for welding. Its advantages are less loss of mechanical conversion, high rectifying efficiency, compact structure, light weight, low cost and high welding quality.

Description

Movable integrated AC-DC welder

The packaged type electric welding machine of prior art, the general tactic pattern that adopts " engine+generator+welding transformer ", promptly the generator that is dragged by the fuel oil engine is made the power supply of welding machine; And weld job is finished by welding transformer.This type, because of the complete machine structure complexity, volume is big and heavy, the production cost height; In addition, there is energy conversion loss twice in this model structure, and promptly once loss is, the generating set (as vapour, diesel engine generator) that is used as power with fuel oil, because of following the split type that engine and generator are formed by mechanical coupling, the mechanical energy conversion loss that itself promptly exists; Its quadratic loss occurs in the energy loss of welding transformer when the step-down electric welding.Therefore, this tactic pattern of traditional portable electric welding machine has been cast the low disadvantage of inevitable complete machine operational efficiency.

For this reason, task of the present invention just is, the portable electric welding machine that a kind of engine and welding generator are incorporate, can produce the AC and DC electricity is provided.

This task is achieved in that in the unit of being made up of engine and generator, along the full periphery of engine flywheel, embeds some permanent magnets, leaves equal spacing between each magnet, thereby makes the flywheel of engine become the rotor disk of generator; A side relative with this rotor disk installed a round stator discs more in opposite directions, in this stator discs, be equipped with rotor disk on some of permanent magnet quantity windings that equate, ribbon core, an air gap is separated by between two dishes.So be provided with, after engine starts, the rotor disk that the double as flywheel is used, the rotating magnetic field because of rotation produces just produces induced current in the winding of ribbon core in stator discs.This induced current just becomes the power supply that welding machine does to exchange weldering; This induced current also can be used as the direct current weldering power supply of welding machine after rectification.

The advantage of this welding machine is very outstanding, the one, owing to make engine and generator (being the source of welding current) form one-piece type unit, no mechanical transmission device between two machines, and save welding transformer again, so the mechanical energy conversion loss of complete machine greatly reduces, overall efficiency is greatly improved, the actual proof of using: this type is compared with traditional similar welding machine, its efficient improves more than 25%, and the engine of 5.6KW can produce the power output of 4.7KW, makes the welding power supply and uses; The 2nd, compact integral structure, its outward appearance is the power type, and weight greatly alleviates, and economizes material joint consumption, and production cost is reduced significantly; The 3rd, the most valuable characteristics of this welding machine are the automatic regulatory functions with welding current, be convenient to weld job and guarantee welding quality, when welded piece difference or weldment are special-shaped component, engine just from motion tracking, adjust rotating speed, thereby the welding job electric current increased or reduce, so can guarantee welding quality, this excellent properties, be that the welding machine that adopts civil power to make the source of welding current can't be accomplished, also for the actual welding operation provides very big convenience, so sung the praises of by the welder; The 4th, this welding machine welding performance excellence proves with practicality after testing: the starting the arc is fast, arcing is long, flameholding, feel spy are good; Weld seam is straight, smooth and tight, but and continuous welding tens of hours, and temperature rise is not transfinited; The operating voltage of this welding machine is greater than (or equaling) 35 volts, and operating current is steadily regulated, so be suitable for using all size welding rod to carry out weld job continuously automatically from 90 amp-135 peaces.

Below in conjunction with accompanying drawing the present invention is described in detail, wherein:

Fig. 1 is the outside drawing of welding machine of the present invention;

Fig. 2 is the rotor disk structural representation of welding machine of the present invention;

Fig. 3 is the stator discs structural representation of welding machine of the present invention;

Fig. 4 is the partial sectional view of welding machine of the present invention;

Fig. 5 is the rectifying device electrical schematic diagram of welding machine of the present invention.

As shown in Figures 1 to 4, welding machine of the present invention is made of diesel engine 1 and the generator is made up of rotor disk 2 and stator discs 3: rotor disk 2 is a circular disk body, and its peripheral embedding has 8 permanent magnets 5, and equal gap 6 is arranged between each magnet; Relative with this rotor disk 2, on bracing frame 7, being provided with between another stator discs 3, two dishes has air-gap 8.On stator discs 3, the winding 10 of 8 ribbon cores 9 is housed, and, is fixed on the bracing frame 7 with bolt by the screw 11 on the stator discs 3.8 windings 10 on the stator discs are the silk-covered copper wire coiled, can adopt two windings string back and or entirely also, after full string mode connects, promptly can be used as the power supply output line of welding machine earlier.

As shown in Figure 5, by the induced current that the stator discs winding produces,, behind the stabilising arc absorption circuit via inductance L, capacitor C 1, C2 and resistance R 1 composition,, do to exchange the weldering use for welding machine just from 3,4 two ends output AC electricity from the input of 1,2 two ends; This alternating current is via four silicon diode D1, D2, D3, D4 and capacitor C 3, C4, and after the rectification circuit rectification that resistance R 2, R3 form, promptly output DC uses for the direct current welding.

Claims

1, movable integrated AC-DC welder is made of engine and generator, and its generator is made up of rotor disk and stator discs, it is characterized in that:

A, described generator amature dish are one and the shared disk of engine flywheel, along the full periphery of this disk, embed some permanent magnets, leave equal spacing between each magnet;

B, described generator unit stator dish are one at the relative opposite side of rotor disk, another disk of An Zhuaning in opposite directions, be equipped with on it with rotor disk on some of permanent magnet quantity windings that equate, ribbon core;

An air gap is separated by between c, rotor disk and the stator discs.

2, welding machine according to claim 1, it is characterized in that, by changing the mode of connection of stator discs winding, after also or entirely also, full string mode connects after promptly adopting two windings to go here and there earlier, promptly can be used as the power supply output line of welding machine, the alternating current of this output just becomes the direct-current electric welding power supply of welding machine after rectification.

3, welding machine according to claim 1 is characterized in that, by the induced current that stator discs produces, after the stabilising arc that inductance L, capacitor C 1, C2, resistance R 1 are formed absorbed circuit, the output AC electricity was done to exchange welding and used; This alternating current is done the direct current welding and is used behind the rectifier rectification that silicon diode D1, D2, D3, D4 and capacitor C 3, C4, resistance R 2, R3 form.