Pulse Transformer Drum Core S1/S2 Ratio Optimization
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Solution Overview
Problem
Conventional pulse transformers face a trade-off between insertion loss and inductance, making it difficult to reduce insertion loss while maintaining adequate inductance, especially in small-sized designs with a drum core and plate-like core configuration.
Innovation Solution
The pulse transformer design includes a drum core with a winding core part, flange parts, and a plate-like core, where the ratio of the winding core's cross-sectional area to the facing area between the flange and plate-like core (S1/S2) is optimized between 0.19 and 0.47 to reduce insertion loss while limiting inductance reduction to 20% or less, and further enhanced by increasing the thickness of the flange part to prevent breakage and ensure mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the thickness of the winding core part is reduced to reduce wire length, then insertion loss is reduced, but the magnetic resistance of the winding core part is increased and inductance is reduced
Solution Approach 1:
The invention changes the geometric parameters of the drum core, specifically optimizing the ratio S1/S2 (cross-sectional area of winding core part to facing area between flange part and plate-like core) to be 0.19 or more and 0.47 or less. This parameter optimization allows the winding core part thickness to be reduced for lower insertion loss while maintaining sufficient inductance through the optimized area ratio relationship.
2Strength
If the thickness of the flange part is increased to prevent breakage of the winding core part, then mechanical strength is improved, but the winding core part becomes more liable to breakage when the thickness of the winding core part is small
Solution Approach 1:
The invention optimizes the ratio S1/S2 to establish a balanced relationship between the flange part thickness and winding core part thickness. This parameter optimization ensures that when the winding core part is made thin to reduce insertion loss, the flange part provides sufficient mechanical support to prevent breakage, thereby maintaining structural integrity while achieving lower insertion loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively reduces insertion loss by 5% or more compared to general pulse transformers while maintaining inductance to a certain extent, and prevents breakage of the winding core part, suitable for small-sized transformers with improved mechanical strength.
Implementation Method 1
a pulse transformer includes: a drum core including a winding core part, a first flange part provided at one end of the winding core part in the axial direction
Implementation Method 2
Assuming that the area of the cross section of the winding core part that is perpendicular to the axial direction is S1 and that the facing area between the plate-like core and the first or second surface is S2, the value of S1/S2 is 0.19 or more and 0.47 or less
Data Source
AI summary
Disclosed herein is a pulse transformer that includes: a drum core including a winding core part and first and second flange parts provided at both ends of the winding core part in an axial direction; a plurality of wires wound around the winding core part; and a plate-like core fixed to the drum core so as to face a first surface of the first flange part that is parallel to the axial direction and a second surface of the second flange part that is parallel to the axial direction. A value of S1/S2 is 0.19 or more and 0.47 or less, where an area of the cross section of the winding core part that is perpendicular to the axial direction is S1 and a facing area between the plate-like core and the first or second surface is S2.