Directional electromagnetic steel sheet
By controlling W and Ti content in grain-oriented electrical steel sheets and applying a specific loss relationship, the invention addresses the discrepancy in iron loss between raw material and transformer cores, achieving reduced building factors and improved magnetic properties.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- JFE STEEL CORP
- Filing Date
- 2024-12-19
- Publication Date
- 2026-05-26
AI Technical Summary
Grain-oriented electrical steel sheets used as transformer cores exhibit a discrepancy between the iron loss of the raw material and the final transformer core, leading to increased iron loss due to high building factors, which are influenced by both design and material properties, necessitating a solution to reduce both iron and eddy current losses.
Control the amounts of W and Ti in the base steel sheet within specific ranges and satisfy a predetermined loss relationship to achieve a low building factor, with W between 0.0010% to 0.0500% and Ti between 0.0050% to 0.0200%, forming a forsterite-based undercoat on the surface, and applying a predetermined formula relating iron and hysteresis losses.
The solution effectively reduces the building factor of grain-oriented electrical steel sheets used in transformers by controlling W and Ti content, thereby minimizing iron and eddy current losses, ensuring optimal magnetic properties and transformer performance.
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