Stationary induction appliance

JP2025091655APending Publication Date: 2025-06-19FUJI ELECTRIC CO LTD
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Patent Information

Application Number
JP2023207038
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-12-07
Publication Date
2025-06-19

AI Technical Summary

Technical Problem

Existing static induction electrical apparatuses face a challenge in maintaining high conductor density due to the spring force exerted by spirally formed coils, which creates gaps between conductors and reduces the effectiveness of resin filling.

Method used

The apparatus includes an iron core with a winding portion featuring a spirally wound coil coated with resin on all sides, and pressing members on both axial sides of the coil that penetrate the resin to apply compressive force, maintaining the coil in a compressed state.

Benefits of technology

This configuration ensures that conductors are closely packed, enhancing conductor density and insulation performance while preventing voids between turns, thus improving the overall efficiency of the electrical apparatus.

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Abstract

To improve the conductor density in a winding portion.SOLUTION: A transformer (1) includes an iron core (10) and a winding portion (20) disposed around the iron core. The winding portion includes a coil (51) formed by helically winding a rectangular conductor (54), and a coating resin (52) that coats the inner peripheral side, the outer peripheral side, and both axial sides of the coil. Pressing members (40) are provided on both axial sides of the coil. The pressing members penetrate the coating resin that coats both axial sides of the coil, and are provided so as to be able to apply a force that compresses the coil from both axial sides.SELECTED DRAWING: Figure 2
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Citation Information

Patent Citations

  • Resin mold coil, manufacturing method thereof and mold transformer

    JP2015211132A