Asymmetric Magnetic Core Layout for Axial Thrust Generation
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Solution Overview
Problem
Conventional magnetic cores for rotating electrical machines do not effectively generate a thrust force in the direction parallel to the rotation axis.
Innovation Solution
A magnetic core design where the geometric center of the tooth portion differs from the geometric center of the core back portion, allowing for the generation of a thrust force parallel to the rotation axis by altering the positions of the geometric centers of the tooth main-body and tooth distal-end portions relative to the core back portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the magnetic core uses a conventional symmetric design with the geometric center of the tooth portion aligned with the geometric center of the core back portion, then the structural stability and manufacturing simplicity are maintained, but the thrust force in the direction parallel to the rotation axis cannot be generated
Solution Approach 1:
The patent applies asymmetry by intentionally misaligning the geometric center of the tooth portion with the geometric center of the core back portion in the direction parallel to the rotation axis. This asymmetric configuration creates an unbalanced magnetic force distribution that generates thrust force, directly resolving the technical contradiction by sacrificing structural symmetry to achieve the desired force generation capability
2Force
If the magnetic core is designed with conventional tooth portion positioning, then the manufacturing precision and assembly simplicity are maintained, but the thrust force generation capability is insufficient
Solution Approach 1:
The patent applies local quality by creating a specific asymmetric positioning relationship between the tooth portion and core back portion. Instead of requiring high precision throughout the entire magnetic core, the invention focuses precision requirements on the specific geometric center offset distance, allowing other areas to be manufactured with standard tolerances. This resolves the contradiction by localizing the precision requirement to only where it is needed for thrust force generation
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
Enables the generation of a thrust force in the direction parallel to the rotation axis, enhancing the performance of rotating electrical machines and brushless motors.
Implementation Method 1
a magnetic core that enables the generation of a thrust force in the direction parallel to the rotation axis
Data Source
AI summary
A magnetic core for a rotating electrical machine, that includes: a core back portion; and a tooth portion including a tooth main-body portion extending from the core back portion in a first direction and a tooth distal-end portion at a distal end of the tooth main-body portion in the first direction, and a position of a geometric center of the tooth portion differs from a position of a geometric center of the core back portion in a second direction parallel to a rotation axis of the rotating electrical machine in a state in which the magnetic core is assembled in the rotating electrical machine.