Hybrid Transformer Core Amorphous Grain-Oriented Steel
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Solution Overview
Problem
Current transformer designs, particularly in power systems, suffer from significant energy losses, contributing to a substantial portion of total distribution losses, and there is a need for more efficient materials and configurations to reduce these losses effectively.
Innovation Solution
A hybrid transformer core design combining yokes of amorphous steel with limbs of grain-oriented steel, where the yokes and limbs are specifically structured and connected to optimize core flux distribution and reduce leakage flux, allowing for thinner steel sheets and advanced control of core flux, thereby minimizing energy losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional silicon steel laminations are used for the entire transformer core, then the structure is simple and easy to manufacture, but the core losses are high
Solution Approach 1:
The patent applies composite materials by combining amorphous steel and grain-oriented steel in a hybrid core structure. The amorphous steel yokes provide low core losses while the grain-oriented steel limbs provide high magnetic permeability and low leakage flux, achieving reduced energy losses through material composition rather than structural complexity
Solution Approach 2:
The patent applies local quality by assigning different material properties to different parts of the core. The yokes are made of amorphous steel with isotropic properties suitable for flux distribution, while the limbs are made of grain-oriented steel with anisotropic properties optimized for vertical flux flow, allowing each region to have the material quality best suited for its specific function
2Loss of energy
If amorphous steel is used for the entire core, then core losses are reduced significantly, but the leakage flux increases and manufacturing becomes more difficult
Solution Approach 1:
The hybrid core combines amorphous steel yokes with grain-oriented steel limbs, leveraging the low core loss property of amorphous steel where it is most beneficial (in the yokes) while using more manufacturable grain-oriented steel for the limbs, thus achieving energy efficiency without sacrificing manufacturing ease
Solution Approach 2:
The patent applies local quality by using amorphous steel specifically in the yokes where low core losses are most critical, while using grain-oriented steel in the limbs where manufacturing ease and structural stability are more important, optimizing both energy efficiency and manufacturability in different locations
3Loss of energy
If the yokes are made larger to improve flux distribution, then core losses are reduced, but the amount of material and device size increase
Solution Approach 1:
The hybrid core structure allows for optimized flux distribution using amorphous steel in the yokes without requiring excessive yoke size, as the material's inherent properties provide better flux distribution characteristics than traditional silicon steel, reducing material quantity while maintaining energy efficiency
Solution Approach 2:
The patent changes the material parameter from traditional silicon steel to amorphous steel in the yokes, which fundamentally alters the flux distribution characteristics and allows for more efficient use of material, reducing the total quantity of steel needed while achieving better flux distribution
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 hybrid transformer core design achieves reduced core losses and energy efficiency by leveraging the anisotropy of the materials and dimensions, allowing for thinner steel usage and improved flux distribution, which translates to lower energy consumption and compliance with stringent climate and energy targets.
Implementation Method 1
The hybrid transformer core comprises a first yoke of amorphous steel and a second yoke of amorphous steel. The hybrid transformer core further comprises at least two limbs of grain-oriented steel extending between the first yoke and the second yoke
Implementation Method 2
The combination of amorphous isotropic core materials with highly anisotropic and domain refined steel in transformers are energy efficient
Implementation Method 3
one method for distribution transformers is to use amorphous steel in as the core material. With this amorphous technology may be possible to reduce the no load losses up to 70%
Data Source
AI summary
A hybrid transformer core includes a first yoke of amorphous steel and a second yoke of amorphous steel. The hybrid transformer core further includes at least two limbs of grain-oriented steel extending between the first yoke and the second yoke. The first end of each one of the at least two limbs is coupled to a first surface of the first yoke in a first connection plane and wherein a second end of each one of the at least two limbs is coupled to a second surface of the second yoke in a second connection plane. The first surface in all directions along the first connection plane extends beyond the first end of each one of the at least two limbs. The second surface in all directions along the second connection plane extends beyond the second end of each one of the at least two limbs.