Axial Gap Motor Stator Core Mounting With Tapered Split Teeth
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Solution Overview
Problem
The existing installation structure of stator cores for axial gap motors faces challenges in precise positioning and fixing due to the use of screws, which can compromise the magnetic circuit and increase complexity, leading to reduced motor performance and durability issues with soft magnetic powder-based dust cores.
Innovation Solution
An annular-shaped stator core with arc-shaped split teeth featuring tapered portions on the outer and inner circumference surfaces, which are engaged with non-magnetic fastening members to ensure precise positioning and fixation without compromising the magnetic circuit, eliminating the need for through holes and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If screws are used to fix the stator core, then the stator core can be fixed to the housing, but the magnetic circuit is compromised and device complexity increases
Solution Approach 1:
The invention extracts and eliminates the harmful element (screws and through holes) from the stator core structure. By using a dust core that is directly fixed to the housing without penetrating fasteners, the magnetic circuit integrity is preserved while achieving stable fixation through the inherent properties of the dust core material and its direct mounting structure.
Solution Approach 2:
The invention introduces a non-magnetic adhesive or mounting structure as an intermediary between the stator core and housing. This mediator enables secure fixation without requiring through holes or screws that would compromise the magnetic circuit, thus resolving the contradiction between fixing stability and magnetic circuit integrity.
2Ease of manufacture
If through holes are formed in the stator core for screw fixation, then the stator core can be mounted, but the magnetic circuit performance deteriorates
Solution Approach 1:
The invention removes the through holes from the stator core design by using a dust core that can be directly mounted without penetrating fasteners. This extraction eliminates the disruption to magnetic flux paths while maintaining ease of manufacture through simplified mounting procedures using adhesives or surface-mounted fixation methods.
Solution Approach 2:
The invention changes the mounting method from mechanical (screws through holes) to chemical or surface-based (adhesive bonding or friction fit). This parameter change in the fixation approach maintains manufacturing ease while preserving magnetic circuit reliability by avoiding physical disruptions to the magnetic material.
3Shape
If soft magnetic powder is used to increase shape freedom, then three-dimensional magnetic circuit configuration is improved, but durability decreases
Solution Approach 1:
The invention uses composite materials by combining soft magnetic powder with binding agents to form a dust core. This composite structure maintains the shape freedom and three-dimensional magnetic circuit configuration advantages of powder-based cores while improving durability through the binding matrix that holds the powder particles together, creating a mechanically robust yet magnetically flexible component.
Data Source
AI summary
An installation structure of a stator core for an axial gap motor includes an annular-shaped stator core having a teeth portion split into pieces combined into an annular shape, and an annular-shaped stator plate having an outer circumference wall part and an inner circumference wall part. The stator core includes stators in a pair mounted between the outer and inner circumference wall parts of the stator plate, with a rotor provided between the stators. The stator core is formed by arc-shaped split stator teeth having outer and inner circumference surfaces provided with tapered portions with which gaps of separation respectively from the outer and inner circumference wall parts of the stator plate widen toward side of the rotor. Each of the arc-shaped split stator teeth is mounted to the stator plate, with each tapered portion engaged to an engagement member fixed to the stator plate.