Iron core material for inverter welding machine main transformer

Abstract

The invention relates to the technical field of inverter welding machines and discloses an iron core material for an inverter welding machine main transformer. The iron core material comprises, by mass percentage, 12.5-13.5% of Si, 8.5-9.5% of B, 2.5-3.0% of Mo, 1.5-2.0% of Co, 0.8-1.0% of Cu, 0.5-0.8% of Ni and the balance Fe. The contents of non-metallic elements of small atomic weight are increased; the Mo, the Co and the Ni are added as ferromagnetic metal elements, and toughness of a belt material is obviously improved; magnetic biasing resistance of an iron core is improved; remanence and coercivity of the material are reduced; the preparation technological conditions are improved in the machining process; the iron core winding and later-stage machining efficiency are obviously improved; the yield is increased, and mechanical properties of the belt material are enhanced; the low high-frequency loss and the high saturation induction density are achieved; and the magnetic hysteresis loss is controlled.

Description

technical field [0001] The invention belongs to the technical field of inverter welding machines, and in particular relates to an iron core material for a main transformer of an inverter welding machine. Background technique [0002] "Inversion" and "rectification" are two opposite concepts. Rectification is the process of converting alternating current into direct current, while inverter is the process of changing direct current into alternating current. The arc welding power supply using inverter technology is called "inverter welding machine". The working process of the inverter welding and cutting equipment is to rectify and filter the three-phase or single-phase 50Hz power frequency AC to obtain a smoother DC. The inverter circuit composed of IGBT or FET converts the DC into 15-100kHz The alternating current, after being stepped down by the intermediate frequency main transformer, is rectified and filtered again to obtain a stable direct current output welding current ...

AI Technical Summary

Problems solved by technology

Traditional welding and cutting equipment uses AC power supply. Due to frequent changes in current and voltage directions, the arc must be extinguished and re-ignited 100-120 times per second. Strength, it is difficult to meet the requirements of high-quality welding

[0003] The core component of the inverter welding machine is the main transformer. The iron core is made of soft magnetic material, which can quickly respond to the changing external magnetic field, but it is easily magnetized by the external magnetic field. When the external magnetic field is removed, it is easy to demagnetize. The heat generated by the loss of the core is difficult to dissipate, resulting in a rapid rise in the temperature of the transformer core. Excessively high temperatures will reduce its magnetic properties, and it will also make debugging, testing, and parameter setting difficult during the production process.