Annealing crystallization process for zero-sequence transformer

Abstract

The invention relates to an annealing crystallization process for zero-sequence transformer, comprising the specific steps of performing annealing crystallization with a horizontal magnetic furnace, and changing automatic structure of material by using magnetic field direction so as to resist direct current; sleeving a steel bar or steel pipe in the horizontal magnetic furnace with iron-based nano crystal magnetic core of required specification, placing laterally along a magnetic field, rotationally operating a magnetic domain laterally under the action of lateral current in the crystallization process, performing crystallization and magnetizing for 3-5 hours to substantially change the atomic structure in the iron-based nano crystal magnetic core so that very low loss of the soft magnetic material per unit area is achieved. The iron-based nano crystal is used as a material, and originally one permalloy magnetic ore and one manganese-zinc ferrite magnetic core can be replaced with one iron-based nano crystal magnetic core through the special process treatment. The iron-based nano crystal magnetic core has low cost and good magnetic permeability and has good uniformity.

Description

technical field [0001] The invention belongs to the field of electromechanical processing, and in particular relates to an annealing and crystallization process of a magnetic core of a zero-sequence transformer. Background technique [0002] Transformers are widely used in many fields, such as water heaters, refrigerators, leakage plugs, washing machines, cars and so on. In Europe, due to the DC superposition in the AC voltage of the transmission line, the general material is saturated due to the DC characteristics, which leads to the distortion and failure of the magnetic core itself in the leakage plug. Therefore, domestic and foreign magnetic core coil manufacturers all use the method of two magnetic cores to achieve the purpose of eliminating distortion and failure. The two magnetic core materials are punched permalloy and manganese zinc ferrite respectively. However, permalloy is expensive and complex to process; while manganese-zinc ferrite is cheap in raw materials,...

AI Technical Summary

Problems solved by technology

However, permalloy is expensive and complex to process; while manganese zinc ferrite is cheap in raw materials, but its manufacturing cost is relatively high

Therefore, although the use of two magnetic cores of different materials in the coil can achieve the use effect, it is expensive and does not meet the needs of market development.

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