Laminated Magnetic Circuit Layout for Low-Eddy Electromagnets
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Solution Overview
Problem
Existing electromagnetic devices with laminated bodies of electromagnetic steel plates face limitations in shaping complexity, leading to insufficient heat management and increased magnetic resistance due to eddy currents and complex magnetic circuits.
Innovation Solution
The electromagnetic device incorporates a magnetic circuit with changing parts where the lamination direction of steel plates changes at a right angle, allowing magnetic flux to flow along the plane direction and reducing eddy currents, thereby improving shape flexibility and heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a laminated body of electromagnetic steel plates is used to suppress eddy current and magnetic resistance, then heat generation is reduced, but the degree of freedom of the magnetic circuit shape becomes insufficient when the shape becomes complex
Solution Approach 1:
The magnetic circuit is divided into multiple members (first member, second member, third member) with different lamination directions. This segmentation allows each member to be optimized independently for its specific function while collectively achieving complex three-dimensional magnetic flux paths, resolving the contradiction between heat suppression and shape flexibility.
Solution Approach 2:
Different portions of the magnetic circuit are assigned different lamination directions based on local requirements. The first member has lamination in a first direction, the second member in a second direction, and the third member in a third direction, allowing each local region to optimize eddy current suppression for its specific magnetic flux path while achieving overall complex geometry.
2Loss of energy
If the lamination direction is changed at a right angle in the magnetic circuit, then eddy current and magnetic resistance are suppressed, but device complexity increases
Solution Approach 1:
The magnetic circuit is segmented into distinct members, each with uniform lamination direction within that member. This segmentation simplifies the manufacturing of individual components while achieving complex overall behavior through the assembly of multiple simpler parts with different orientations.
Solution Approach 2:
The magnetic circuit uses a composite structure of multiple laminated members with different lamination directions. This composite approach combines the simplicity of standard laminated construction with the complexity needed to suppress eddy currents in three-dimensional magnetic flux paths, resolving the contradiction between energy loss reduction and structural complexity.
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 configuration enhances the degree of freedom in shaping the magnetic circuit, reduces heat generation, and minimizes magnetic resistance, ensuring precise and efficient operation of electromagnetic devices.
Implementation Method 1
each of the first member and the second member is formed from a laminated body of a plurality of steel plates, and a magnetic circuit formed from the first member and the second member includes a changing part at which a lamination direction of the laminated body changes at a right angle to generate a magnetic flux along a plane direction of each of the plurality of steel plates
Implementation Method 2
a coil wound around one of the first member and the second member
Implementation Method 3
a magnetic circuit formed from the first member and the second member includes a changing part at which a lamination direction of the laminated body changes at a right angle to generate a magnetic flux along a plane direction
Data Source
AI summary
An electromagnetic device includes a first member having a first end face, a second member having a second end face facing the first end face through an air gap, and a coil wound around one of the first member and the second member. Each of the first member and the second member is formed from a laminated body of a plurality of steel plates, and a magnetic circuit formed from the first member and the second member includes a changing part at which a lamination direction of the laminated body changes at a right angle to generate a magnetic flux along a plane direction of each of the plurality of steel plates.