A high-voltage transformer

By adding a widened section and pin connection leads to the transformer, sealing the gaps in the magnetic core with bushings, and shielding with copper foil, the problem of insufficient transformer withstand voltage was solved, achieving higher withstand voltage and EMI suppression, and improving the electrical insulation and reliability of the transformer.

CN224437354UActive Publication Date: 2026-06-30ZHONGSHAN HONGHUA ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHONGSHAN HONGHUA ELECTRONICS CO LTD
Filing Date
2025-06-10
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The voltage withstand capability of existing transformers is insufficient and cannot meet the requirements of some application scenarios that require higher voltage withstand capability.

Method used

By setting widening sections and pins on the skeleton, connecting leads to the sidewalls of the magnetic core body, sleeves are fitted on the opposite and same-name ends of the primary and secondary windings, and black glue is used to seal the gaps in the magnetic core. Combined with copper foil surrounding shielding, electrical insulation is enhanced and short circuits are prevented, and creepage distance is extended.

Benefits of technology

It significantly improves the transformer's withstand voltage, reduces EMI, suppresses noise and electromagnetic interference, ensures the transformer can withstand higher voltages, and enhances reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a high-voltage withstand transformer, relating to the field of transformers. It includes a frame and a core body fixed to the frame. A primary winding N1 and a secondary winding N2 are sequentially wound on the frame. The frame extends with a widened portion, on which a first pin is provided. Leads connected to the first pin are provided on the sidewalls of the core body. Because the frame extends with a widened portion, and the core body has leads connected to the first pin on the widened portion, sufficient safety distance is ensured through the widened portion to prevent transformer breakdown. The leads can discharge parasitic charges, significantly reducing EMI and improving the transformer's withstand voltage reliability. Furthermore, bushings are provided at the opposite-named terminals of the primary winding N1, the opposite-named terminals of the secondary winding N2, and the same-named terminals of the secondary winding N2. These bushings prevent exposed conductors from contacting the core body, frame, or other pins, avoiding inter-turn or inter-layer short circuits and extending the creepage distance, thereby enabling the transformer to withstand higher voltages and improving its withstand voltage strength.
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