Replaceable Magnetic Bearing Module for Electric Machine Adaptability
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Solution Overview
Problem
Magnetic bearing technology faces challenges in high-speed applications due to the need for full integration with working machines that impose varying axial and radial forces, making it difficult to create electric machines compatible with different mechanical loads, thus limiting its wider market application.
Innovation Solution
An electric machine system with a stator and rotor, featuring magnetic bearing modules that are detachable and replaceable, allowing for adaptation to different working machines by selecting suitable magnetic bearing modules, which can include radial and axial magnetic bearings, and optionally touchdown bearings for backup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If magnetic bearing technology is used in high-speed electric machines, then the machine can achieve high performance and efficiency, but it becomes difficult to adapt to different working machines with varying axial and radial forces
Solution Approach 1:
The magnetic bearing system is divided into a fixed internal bearing structure and a replaceable external magnetic bearing module. This segmentation allows the core electric machine to remain unchanged while adapting to different working machines by simply swapping the external module, thus resolving the contradiction between maintaining high performance and achieving versatility.
Solution Approach 2:
The magnetic bearing system transitions from a static, integrated design to a dynamic, configurable architecture where the external magnetic bearing module can be selectively attached or detached based on the specific force requirements of different working machines, enabling adaptability without compromising performance.
2Adaptability or versatility
If full integration of working machine and high-speed electric machine is performed, then compatibility with specific working machines is achieved, but device complexity and integration difficulty increase significantly
Solution Approach 1:
The magnetic bearing functionality is extracted from the core electric machine and placed in a separate, replaceable external module. This extraction simplifies the core machine design while providing flexibility to adapt to different working machines without increasing overall system complexity.
Solution Approach 2:
The external magnetic bearing module serves as a universal interface that can be attached to the same electric machine for different working machine applications. This multi-functional module handles various axial and radial force requirements, reducing integration complexity while maintaining broad compatibility.
3Adaptability or versatility
If magnetic bearing modules are made detachable and replaceable, then adaptability to different working machines is improved, but manufacturing and assembly complexity increases
Solution Approach 1:
The magnetic bearing system is segmented into a permanent fixed part and a detachable external module with standardized connection interfaces. This segmentation enables the module to be manufactured separately and assembled through simple attachment operations, maintaining ease of manufacture while achieving adaptability.
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 electric machine to be compatible with various working machines by allowing for the selection of appropriate magnetic bearing modules, enhancing its adaptability and reducing the complexity of integration, thereby expanding the application of magnetic bearing technology.
Implementation Method 1
magnetic bearing modules which can include radial and axial magnetic bearings
Implementation Method 2
an electromagnetically active part for producing torque in co-operation with the electromagnetically active part of the stator
Data Source
AI summary
An electric machine includes a stator and a rotor. The stator includes a frame structure and an electromagnetically active part inside the frame structure. The rotor includes a shaft and an electromagnetically active part for producing torque in co-operation with the electromagnetically active part of the stator. The electric machine includes bearings inside the frame structure and arranged to support the rotor rotatably with respect to the stator. A magnetic bearing module for supporting the shaft is attached to an outer surface of the frame structure so that the frame structure and the magnetic bearing module are axially successive. The magnetic bearing module is a replaceable component which is non-destructively detachable from the frame structure. Thus, the electric machine can be adapted to different mechanical loads by selecting a suitable magnetic bearing module.