Rotor-Stator Structures with Boost Magnets for Torque and Heat Dissipation
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Solution Overview
Problem
Conventional axial motor and generator structures experience losses such as eddy current and hysteresis losses due to heat transfer issues in traditional outer rotor configurations, where stators and windings are located within a smaller diameter region, leading to inefficient heat dissipation and resource consumption.
Innovation Solution
The implementation of rotor-stator structures with outer rotor assemblies featuring magnetic regions disposed outside conically-shaped spaces, allowing for enhanced torque generation and reduced manufacturing material consumption by optimizing the angle and surface area of magnetic materials and magnetically permeable structures to improve flux concentration and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If stators and windings are located within the interior of conventional outer rotor configurations, then the structure is compact, but heat transfer is hindered and heat dissipation becomes insufficient
Solution Approach 1:
The patent transitions from a traditional radial arrangement where windings are enclosed within the rotor to an axial arrangement where windings extend outward from the rotor surface. This dimensional repositioning allows heat to dissipate axially along the rotor length rather than being trapped radially, solving the heat dissipation problem while maintaining compactness through optimized spatial utilization.
2Device complexity
If traditional axial-based rotor and stator configurations are used, then the structure is simple, but eddy current and hysteresis losses increase
Solution Approach 1:
The patent segments the rotor structure into distinct functional zones: magnetic regions with specific orientation for flux generation, and winding regions positioned axially outward. This segmentation allows optimization of each zone's function while reducing overlapping flux paths that cause eddy currents and hysteresis losses in traditional configurations.
Solution Approach 2:
The patent applies different material properties and structural characteristics to different regions: magnetically permeable material is concentrated in specific magnetic regions rather than throughout the entire rotor, and windings are positioned in zones optimized for electromagnetic interaction. This local optimization reduces unnecessary material exposure to alternating flux, minimizing energy losses.
3Force
If magnetic material amount is increased to improve torque generation, then torque increases, but hysteresis losses increase due to more material being magnetized and demagnetized
Solution Approach 1:
The patent extracts magnetic material from continuous bulk structures and concentrates it into discrete, strategically positioned magnetic regions. By removing unnecessary magnetically permeable material from areas where it does not contribute to torque generation, the total volume of material subjected to alternating flux is reduced, lowering hysteresis losses while maintaining adequate torque through optimized magnetic region placement and geometry.
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 torque generation, reduces material consumption, and improves heat dissipation in electrodynamic machines, leading to more efficient and compact motor designs suitable for high-speed applications.
Implementation Method 1
magnetic regions disposed outside conically-shaped spaces... optimize the angle and surface area of magnetic materials and magnetically permeable structures to improve flux concentration
Implementation Method 2
enhances torque generation... improve flux concentration
Implementation Method 3
optimize the angle and surface area of magnetic materials and magnetically permeable structures to improve flux concentration
Data Source
AI summary
Various embodiments relate generally to electrodynamic machines and the like, and more particularly, to rotor assemblies and rotor-stator structures for electrodynamic machines, including, but not limited to, outer rotor assemblies and/or inner rotor assemblies with a corresponding stator assembly. In some embodiments a rotor assembly can include magnetically permeable structures having confronting surfaces oriented at an angle to the axis of rotation. A group of magnetic structures can be interleaved with the magnetically permeable structures. The magnetically permeable structures can also include non-confronting surfaces adjacent to which boost magnets are disposed to enhance flux in a flux path passing through magnetic structures that are interleaved with magnetically permeable structures. Further, the rotor assemblies can include a flux conductor shield disposed adjacent to the boost magnets, the flux conductor shield configured to provide return flux paths.