Resin-Molded Stereo Wound-Core Amorphous Alloy Transformer
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Solution Overview
Problem
Conventional dry-type amorphous alloy transformers suffer from higher noise levels and weaker short-circuit withstanding ability due to their thin thickness, mechanical stress sensitivity, low saturation magnetic flux density, and rectangular winding structure.
Innovation Solution
A resin-molded stereo wound-core dry-type amorphous alloy transformer design featuring a core with semi-circular or semi-regular-polygonal single frames forming circular core pillars, with high-voltage and low-voltage windings arranged on these pillars and encapsulated in epoxy resin, and a clamp system that includes padding blocks to distribute force evenly and enhance mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional rectangular winding structure is used, then manufacturing is simple, but short-circuit withstanding ability is weak
Solution Approach 1:
The patent transforms the conventional rectangular winding structure into a circular winding structure. The circular shape allows for more uniform distribution of electromagnetic forces during short-circuit conditions, reducing stress concentration and improving the overall short-circuit withstanding ability of the transformer.
Solution Approach 2:
The patent employs composite material construction by combining amorphous alloy core material with traditional winding materials. The amorphous alloy core provides superior magnetic properties and mechanical strength, which enhances the short-circuit withstanding capability while maintaining manufacturing feasibility.
2Loss of energy
If thin thickness amorphous alloy core is used, then no-load loss is reduced, but noise level increases
Solution Approach 1:
The patent uses composite material construction by combining amorphous alloy core material with traditional winding materials. The amorphous alloy core provides superior magnetic properties and mechanical strength, which enhances the short-circuit withstanding capability while maintaining manufacturing feasibility.
Solution Approach 2:
The patent transforms the conventional rectangular winding structure into a circular winding structure. The circular shape allows for more uniform distribution of electromagnetic forces during short-circuit conditions, reducing stress concentration and improving the overall short-circuit withstanding ability of the transformer.
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
The design reduces noise and improves short-circuit withstanding ability by minimizing magnetic incoherence and stress concentration, while conserving amorphous alloy materials and reducing no-load losses.
Implementation Method 1
the magnetic conduction direction of which is in line with the magnetic circuit direction of the core
Implementation Method 2
the windings are entirely encapsulated with a solid epoxy resin layer
Implementation Method 3
the upper clamp and the upper pressing board are configured to compress the upper padding blocks
Data Source
AI summary
The patent discloses a resin-molded stereo wound-core dry-type amorphous alloy transformer, belonging to the field of power equipment. The resin-molded stereo wound-core dry-type amorphous alloy transformer disclosed is characterized in its stereo wound-core structure. Three lower yokes are provided on a welded base of a lower clamp, and an upper clamp and a lower clamp are connected with each other by press screws. Its low-voltage windings are with a foil-wound or cylindrical structure, while its high-voltage windings are wound with oxygen-free copper wires wrapped in NOMEX® paper and processed through vacuum pressure impregnation. In addition, several upper and lower padding blocks are involved to support and compress the high-voltage and low-voltage windings, so that the product is formed in a rigid stereo frame structure.