Encapsulated Reluctance Rotor With Embedded Flow Guide Segments
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Solution Overview
Problem
Conventional permanent magnet machines are expensive and complex, making them unsuitable for cost-effective applications in the automobile industry, particularly for high-voltage fans.
Innovation Solution
A reluctance machine design featuring a rotor with embedded flow guide segments and an encapsulated body, which generates torque through reluctance force without permanent magnets, allowing for efficient and low-cost production by embedding smaller components that can be adapted to specific applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If permanent magnet machines are used, then high power density is achieved, but cost and complexity increase significantly
Solution Approach 1:
The patent removes permanent magnets from the rotor design, extracting the expensive and complex magnetic components while maintaining the core torque generation function through reluctance force alone. This extraction directly addresses the contradiction by eliminating the source of high cost and complexity while preserving power density through alternative magnetic circuit design.
Solution Approach 2:
The patent replaces expensive permanent magnets with simpler, cheaper magnetic circuit elements including windings and magnetic barriers. These alternative components are less costly and can be manufactured more easily, directly resolving the cost and complexity issues while maintaining the necessary power output through reluctance torque generation.
2Power
If permanent magnet machines are used, then high power density is achieved, but manufacturing cost increases
Solution Approach 1:
By extracting permanent magnets from the design, the patent eliminates the need for expensive magnetic material procurement and complex magnet assembly processes. The resulting structure uses standard electrical components that are easier and cheaper to manufacture, directly addressing the cost contradiction while maintaining power density through magnetic circuit optimization.
Solution Approach 2:
The patent substitutes expensive permanent magnets with cheaper alternative components such as windings and magnetic barriers made from conventional materials. These components can be manufactured using standard industrial processes, significantly reducing manufacturing cost while maintaining the necessary power output through reluctance force.
3Stability of the object's composition
If conventional rotor designs are used, then structural integrity is maintained, but production waste and cost increase
Solution Approach 1:
The patent segments the rotor into modular components including magnetic barriers and flow guide segments that can be manufactured separately and assembled. This segmentation allows for optimized manufacturing processes with less material waste, while the modular structure maintains structural integrity through precise assembly of the segmented components.
Solution Approach 2:
The patent applies different material properties and structural characteristics to specific local regions of the rotor, such as magnetic barriers in certain zones and flow guide segments in others. This localized optimization allows each region to perform its specific function efficiently while reducing overall material usage and production waste, maintaining structural integrity where needed.
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 production waste and costs while maintaining performance, enabling wide application in electric vehicles and other customer-specific uses.
Implementation Method 1
The stator comprises windings which induce a magnetic field because of the flow of current
Implementation Method 2
During operation, the poles and hence the rotor follow the changing stator magnetic field because of the reluctance force
Data Source
AI summary
A reluctance machine has a stator (3) and a rotor (1). The rotor (1) comprises an encapsulated body (17), which can rotate about an axis of rotation (15) of the rotor (1), and a plurality of flow guide segments (19). The flow guide segments (19) form poles of the rotor (1), are arranged in a circumferential direction about the axis of rotation (15), and are embedded in the encapsulated body (17).