A clover-leaf high-frequency transformer planar winding applied to a large-current scenario

By designing a planar winding of a clover-shaped high-frequency transformer, and combining it with rectifier tubes and output capacitors to form a full-wave rectifier circuit, the problems of high current stress and high loss in the secondary winding of traditional matrix transformers are solved. This achieves a reduction in the length and resistance of the secondary winding, improves power efficiency, and promotes modular production.

CN117894570BActive Publication Date: 2026-06-19XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Filing Date
2024-01-08
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Traditional matrix transformers suffer from high current stress and losses in the secondary windings under high current conditions, which limits the improvement of power efficiency. Furthermore, increasing the number of PCB layers increases costs and heat dissipation difficulties.

⚗Method used

The high-frequency transformer adopts a planar winding with a four-leaf clover shape. The secondary winding is concave four-leaf clover-shaped, and the winding semi-encircles the central column of the magnetic core. Combined with the rectifier tube and the output capacitor, a full-wave rectifier circuit is formed, which shortens the winding length and reduces the resistance.

🎯Benefits of technology

Without affecting the normal operation of the transformer, the length of the secondary winding is shortened to half that of the traditional solution, effectively reducing AC resistance, improving power supply efficiency, and enabling modular production and high integration.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of high-frequency transformer winding technology, and relates to a clover-shaped planar winding of a high-frequency transformer for high-current applications. It includes a primary winding and a secondary winding, with the secondary winding located at both ends of the magnetic core column. The winding of the secondary winding partially encircles the outer circumference of the magnetic core column. A rectifier tube and an output capacitor are respectively located at both ends of the winding. The rectifier tube limits the current direction, and the output capacitor filters out AC components. The winding of the secondary winding passes through the transformer's flux induction window. This invention shortens the winding length without affecting the normal operation of the transformer; the length is only half that of traditional solutions, effectively reducing the AC resistance of the secondary winding and thus improving power efficiency.
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