CN2244451Y - Three-phase constant current energy-saving ac arc welder - Google Patents

Abstract

The utility model relates to a three-phase constant current energy-saving ac arc welder, comprising a transformer B1, a transformer B2, a primary winding and a secondary output coil, wherein, the transformer B1 is composed of windings L1 and L2 winding both side posts of an iron core whose shape like the Chinese character 'ri 'and a winding L3 winding a middle post; the transformer B2 is composed of windings L4 and L5 winding a tetragonal iron core; the L1, L2 and L4 are respectively connected between A, B and C phases, forming the primary winding; the L3 and the L5 are connected in series, forming the secondary output of a main transformer. Apparent power ratio of a B1 and a B2 is 2: 1. The arc striking and arc stabilizing circuits of the utility model can output high-frequency arc striking voltage. The input of the utility model is three-phase and constant current; the utility model has the advantages that the electricity can be saved, the utility model is good for balance electric supply for an electric network, the reliability of the arc striking can be increased.

Description

Three equal streams Energy-Saving AC Arc Welding Machine

The utility model relates to AC arc welding power source.

At present, the power supply of ac arc wedling machine has two kinds of controllable silicon formula and electromagnetic types.Advantages such as it is in light weight that controllable silicon formula arc-welding machine has high efficiency, energy consumption is little, volume is little, but cost height, right poor by property.The electromagnetic type arc-welding machine is divided into: moving-iron type.Consubstantiality formula and moving-coil type.Low, the good reliability of the cost of electromagnetic type arc-welding machine, but operating efficiency is not high, and energy consumption is big, and heaviness very.Traditional electromagnetic type arc-welding machine destroys grid balance power supply in addition except that above-mentioned shortcoming, influence power supply quality, and when existing striking, needs " point " " drawing " to operate the poor reliability of striking stabilising arc.

This practical purpose is to provide a kind of can make the input of transformer of arc welder three equal streams, has three equal streams Energy-Saving AC Arc Welding Machine of high-frequency arc strike.

The utility model is made up of main transformer, accent stream reactor and striking arc static circuit three parts.It is characterized in that; Main transformer comprises: transformer B ₁, B ₂By coil L around two side columns of day font iron core ₁, L ₂With the coil L on center pillar ₃Form transformer B ₁By coil L around the port type iron core two side columns ₄, L ₅Form transformer ₂, coil L ₁With L ₂With the adjacent connection of an end of the same name, L ₂The other end and L ₄With the adjacent connection of different name one end, L ₁The other end and L ₄The other end be connected, constitute the elementary winding of main transformer; Power supply A, B, C three-phase are respectively with coil L ₁, L ₂, L ₄Three tie points be connected; Above-mentioned coil L ₃And L ₅Be connected with an end of the same name, serial connection constitutes the secondary coil of main transformer, transformer B ₁With B ₂Apparent energy be 2: 1; The latent arc circuit of striking is by transformer BT, B ₃, B ₄A.C. contactor MA, MK, press button SA, SB and discharge and recharge gap S and form, a contact in that power supply A, C are serially connected with A.C. contactor MA and A.C. contactor MK between mutually also is serially connected with button SA and transformer B ₄Elementary winding L ₁₃, the contact of A.C. contactor MA is connected on respectively in three phase mains A, B, the C phase line; Transformer B ₄Secondary coil L ₁₀, L ₁₁, L ₁₂In L ₁₀Two ends are connected to relay indicating light, L ₁₁Two ends are connected to by resistance R, transformer B ₃Primary winding L ₉, the serial connection branch road that the contact of A.C. contactor MK is formed and by capacitor C ₃With capacitor C ₄Series arm; Capacitor C ₄, C ₃Link be earth terminal; L ₁₂Two ends are connected to A.C. contactor MK and connect key SB series arm; Transformer B ₃Secondary coil L ₈Two ends are connected to one and discharge and recharge gap S and one by capacitor C ₁, transformer BT primary coil L ₇The branch road that is composed in series; By coil L ₇, capacitor C ₁Gap S is common to constitute a high-frequency oscillating circuits with discharging and recharging; Transformer BT secondary coil L ₆H together is serially connected in above-mentioned main transformer secondary coil L with accent stream reactor ₅, L ₃In the series arm, the two ends of this series arm are the output of arc-welding machine; There is a high-frequency isolation electric capacity to be connected on and transfers stream reactor H and main transformer secondary coil L ₃, L ₅The series arm two ends.

Main transformer of the present utility model is three equal electric current inputs, changes the irrational power mode of traditional welding machine, helps the grid balance power supply, improves the power supply quality of power supply network.This rating of set factor height, and no-load current is little, therefore has the effect of economize on electricity.Another characteristics of the present utility model are high frequency electrics that the high-frequency arc strike arc static circuit can produce 15-20KZH, have improved the reliability of striking, and have compensated 100 zero passage blow-outs of sinusoidal wave 50HZ, make electric arc obtain smooth combustion.

The drawing explanation:

Accompanying drawing is circuit theory diagrams of the present utility model

For example execute down pass of the present utility model: main transformer is by B ₁And B ₂Form transformer B ₁Primary coil L ₁, L ₂Be wound on two side columns of day font transformer L respectively ₁With L ₂For end of the same name is connected, L ₁Be connected between A, the B phase L ₂Be connected between B, the C phase B ₁Secondary coil L ₃Be wound on the center pillar of above-mentioned day font iron core L ₃Can obtain double circle/volt voltage.Transformer B ₂Primary coil L ₄With secondary coil L ₅Be wound on the two side columns of a square shape iron core L respectively ₄Be connected between A, the C phase, and and L ₂For the different name end is connected, L ₅With L ₃For end of the same name is connected, series connection constitutes the secondary wire of main transformer and irises out above-mentioned transformer B ₁With B ₂Apparent energy be 2: 1 o'clock, can obtain waiting the stream input.The striking arc static circuit is by transformer BT, B ₃, B ₄, A.C. contactor MA, MK, button SA, SB and discharge and recharge gap S and form.Transformer B ₄Primary coil L ₃With button SA be serially connected in A, C mutually between, the contact of A.C. contactor MA and MK also be serially connected in A, C mutually between, when connecting SA, SB successively, MA work is connected on contact in A, B, the C triple line by adhesive, the arc-welding machine working power is switched on.B ₄Secondary coil L ₁₀Be connected to relay indicating light, B ₄Secondary second coil L ₁₁Be connected to B ₃Primary coil L ₉, B ₃Secondary coil L ₈Be output as three kilovoltages, be connected on L ₈C ₁, L ₇Form a high-frequency oscillating circuits, the secondary coil L of high frequency transformer BT with S ₆Be serially connected in the output circuit capacitor C ₂Be a high-frequency isolation electric capacity.B ₄Secondary the 3rd coil L ₁₂Be serially connected with MK, SB, connect SB, can make MK work, be connected on above-mentioned B ₄Second coil L of the inferior utmost point ₁₁Circuit in the contact adhesive.Striking arc static circuit described in the utility model can guarantee between welding rod and weldering body in the 0.5-2mm distance, the electric arc that can ignite, an arcing initiation success rate when welding again reaches 100%, applicable to various tack weldings, single welding, double-faced forming weldering, and can when receiving arc, fill up arc crater.Applicable to various welding rods, and to weldment need not paint removal rust cleaning, save the manpower financial capacity.

Claims (1)

1. A kind of three equal streams Energy-Saving AC Arc Welding Machine of being made up of main transformer, accent stream reactor and striking arc static circuit, it is characterized in that: main transformer comprises: transformer B ₁And B ₂By coil L around two side columns of day font iron core ₁, L ₂With the coil L on center pillar ₃Form transformer B ₁By coil L around square shape iron core two side columns ₄, L ₅Form transformer B ₂, coil L ₁With L ₂With the adjacent connection of an end of the same name, L ₂The other end and L ₄With the adjacent connection of different name one end, L ₁The other end and L ₄The other end be connected, constitute the elementary winding of main transformer; Power supply A, B, C three-phase divide in addition with coil L ₁, L ₂, L ₄Three tie points be connected; Above-mentioned coil L ₃And L ₅Adjacent with an end of the same name, serial connection constitutes the secondary coil of main transformer, transformer B ₁With B ₂Apparent energy be 2: 1; The latent arc circuit of striking is by transformer BT, B ₃, B ₄A.C. contactor MA, MK, press button SA, SB and discharge and recharge gap S and form, a contact in that power supply A, C are serially connected with A.C. contactor MA and A.C. contactor MK between mutually also is serially connected with button SA and transformer B ₄Elementary winding L ₁₃, the contact of A.C. contactor MA is connected on respectively in three phase mains A, B, the C phase line; Transformer B ₄Secondary coil L ₁₀, L ₁₁, L ₁₂In L ₁₀Two ends are connected to relay indicating light, L ₁₁Two ends are connected to by resistance R, transformer B ₃Primary winding L ₉, the serial connection branch road that another contact of A.C. contactor MK is formed and by capacitor C ₃With capacitor C ₄Series arm; Capacitor C ₄, C ₃Link be earth terminal; L ₁₂Two ends are connected to A.C. contactor MK and connect key SB series arm; Transformer B ₃Secondary coil L ₃Two ends are connected to one and discharge and recharge gap S and one by capacitor C ₁, transformer BT primary coil L ₇The branch road that is composed in series; By coil L ₇, capacitor C ₁Gap S is common to constitute a high-frequency oscillating circuits with discharging and recharging; Transformer BT secondary coil L ₆H together is serially connected in above-mentioned main transformer secondary coil L with accent stream reactor ₅, L ₃In the series arm, the two ends of this series arm are the output of arc-welding machine; There is a high-frequency isolation electric capacity to be connected on and transfers stream reactor H and main transformer secondary coil L ₃, L ₅The series arm two ends.