Core and assembly of a transformer, transformer and method of manufacturing a core of a transformer

By using a hybrid core design of amorphous materials and electrical steel, with gradually thinning legs and non-circular winding configuration, the problems of insufficient mechanical strength and winding complexity of hybrid cores in existing technologies are solved, enabling more efficient and flexible transformer core applications.

CN122249870APending Publication Date: 2026-06-19HITACHI ENERGY LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HITACHI ENERGY LTD
Filing Date
2024-10-24
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Existing hybrid transformers suffer from insufficient mechanical strength and rigidity in the core, large loss fluctuations, complex and inflexible winding configurations, making them difficult to adapt to transformer applications with non-circular windings, and their assembly is complex and labor-intensive.

⚗Method used

The hybrid core design, which combines amorphous materials and electrical steel, features legs that extend longer in the first direction than in the second direction and taper gradually, allowing the windings to be wound in a non-circular manner. Combined with the configuration of strip materials and stacked plates, this simplifies the manufacturing process.

🎯Benefits of technology

It improves the mechanical strength and rigidity of transformers, reduces losses, simplifies winding configuration and assembly processes, and is suitable for a wider range of transformer applications, especially low-rated power transformers.

✦ Generated by Eureka AI based on patent content.

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Abstract

This disclosure relates to a core (12) of a transformer (10), the core including at least one leg (14) around which a winding (18) can be wound. The leg (14) includes a first core component (26) made of an amorphous material and a second core component (32) made of electrical steel. When the winding (18) is wound around the leg (14), the leg (14) extends in a first direction (50) perpendicular to a first winding axis (20) and in a second direction (52) perpendicular to both the first winding axis (20) and the first direction (50). The extension length of the leg (14) in the first direction (50) is greater than the extension length of the leg (14) in the second direction (52). The leg (14) tapers gradually in the first direction (50) and / or the second direction (52). This disclosure also relates to an assembly, a transformer, and a method of manufacturing the core (12).
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