Radial Magnetic Bearing Coil Layout for Stable Non-Contact Support
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Solution Overview
Problem
Existing radial magnetic bearings face challenges in efficiently supporting rotating bodies in a non-contact manner with optimal electromagnetic force distribution and stability, particularly in compressors and refrigeration machines.
Innovation Solution
A radial magnetic bearing design featuring a tubular yoke, teeth, slots, and multiple coils arranged in a specific configuration to generate electromagnetic force, allowing for non-contact support of rotating bodies with controlled electromagnetic force distribution, including a unique coil arrangement where parts of coils are disposed in overlapping positions within slots to enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coils are arranged in the same slot with overlapping positions, then electromagnetic force distribution is optimized and stability is enhanced, but device complexity increases
Solution Approach 1:
The patent applies nesting by placing parts of multiple coils (first coil and second coil) within the same slot in overlapping radial positions. The inner coil is positioned radially inward from the outer coil, creating a nested arrangement that optimizes electromagnetic force distribution while maintaining structural compactness.
Solution Approach 2:
The patent resolves coil arrangement complexity by transitioning from a circumferential arrangement to a radial arrangement within the slot. By positioning coil parts at different radial distances from the center while maintaining overlap in the circumferential direction, the design utilizes the radial dimension to achieve optimal electromagnetic force distribution without excessive circumferential complexity.
2Power
If multiple coils are wound around different teeth with overlapping slot positions, then electromagnetic force distribution is optimized, but manufacturing complexity increases
Solution Approach 1:
The patent divides the coil structure into multiple independent coils (first coil and second coil) wound around different teeth. Each coil can be manufactured and positioned separately, with the first coil around a first tooth and the second coil around a second tooth, allowing modular manufacturing while achieving optimized electromagnetic force distribution through their overlapping arrangement in shared slots.
Solution Approach 2:
The patent applies nesting by placing parts of multiple coils (first coil and second coil) within the same slot in overlapping radial positions. The inner coil is positioned radially inward from the outer coil, creating a nested arrangement that optimizes electromagnetic force distribution while maintaining structural compactness.
3Stability of the object's composition
If coils are arranged to overlap in radial direction within slots, then gap between coils is reduced and stability is improved, but electromagnetic force distribution complexity increases
Solution Approach 1:
The patent resolves coil arrangement complexity by transitioning from a circumferential arrangement to a radial arrangement within the slot. By positioning coil parts at different radial distances from the center while maintaining overlap in the circumferential direction, the design utilizes the radial dimension to achieve optimal electromagnetic force distribution without excessive circumferential complexity.
Solution Approach 2:
The patent applies local quality by creating different radial positions for different coil parts within the same slot. The first coil occupies a radially outer position while the second coil occupies a radially inner position, allowing each coil to contribute differently to the electromagnetic force distribution while maintaining overall structural stability through their overlapping arrangement.
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 provides stable, non-contact support for rotating bodies, enhancing the operational efficiency and stability of compressors and refrigeration machines by optimizing electromagnetic force distribution and reducing gaps between coils.
Implementation Method 1
a first coil (31) and a second coil (32), wherein the first coil (31) is wound around one of the teeth (50), and the second coil (32) is wound around a further one of the teeth (50)... configured to support a rotating body (12)
Data Source
AI summary
A radial magnetic bearing includes a tubular yoke, teeth projecting inward from the yoke in a radial direction of the yoke, slots surrounded by the teeth and the yoke, a first coil wound around one of the teeth, and a second coil wound around an other one of the teeth different from the one of the teeth around which the first coil is wound. The teeth are spaced apart in a circumferential direction of the yoke. The slots are open inward in the radial direction. A part of the first coil and a part of the second coil are both disposed in a predetermined one of the slots. In the predetermined one of the slots, the part of the second coil is disposed inward from the part of first coil in the radial direction.