Asymmetric Magnetic Guide Rotor Segment for Oscillation Reduction
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Solution Overview
Problem
The assembly and maintenance of rotor segments in rotating electric machines with skewed magnetic guides are costly and time-consuming, especially in large machines, due to their complex design and the need for precise alignment to reduce mechanical oscillations.
Innovation Solution
A rotor segment design featuring magnetic guides with asymmetric faces and projections that allow for non-uniform magnetic field distribution along the axis, reducing oscillations and spatial harmonics while enabling axial sliding and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the rotor segment is arranged along an alignment axis forming a skew angle with the generatrix to reduce mechanical oscillations, then the mechanical oscillations are attenuated, but the assembly cost and time increase significantly
Solution Approach 1:
The magnetic guide is designed with an asymmetric cross-section where the first face has a greater surface area than the second face. This asymmetry creates a non-uniform magnetic field distribution along the axial direction, which effectively reduces mechanical oscillations and spatial harmonics while allowing the rotor segment to be assembled parallel to the rotation axis, thereby reducing assembly time and cost.
2Object-affected harmful factors
If the rotor segment is arranged along an alignment axis forming a skew angle with the generatrix to reduce mechanical oscillations, then the mechanical oscillations are attenuated, but the assembly cost increases
Solution Approach 1:
The magnetic guide features an asymmetric cross-section with the first face having a greater surface area than the second face. This asymmetric design creates the necessary non-uniform magnetic field to reduce oscillations while maintaining a simpler geometric configuration that is easier and less costly to manufacture compared to skewed arrangements.
Solution Approach 2:
Instead of solving the oscillation problem by skewing the rotor segment in the radial direction (forming an angle with the generatrix), the invention transitions to solving it in the axial dimension by creating asymmetric face areas. This dimensional shift allows for cost-effective manufacturing while achieving the same oscillation reduction effect.
3Object-affected harmful factors
If the rotor segment is arranged along an alignment axis forming a skew angle with the generatrix to reduce mechanical oscillations, then the mechanical oscillations are attenuated, but the disassembly procedure becomes complex and time-consuming
Solution Approach 1:
The asymmetric cross-section of the magnetic guide with unequal face areas provides the necessary non-uniform magnetic field for oscillation reduction while maintaining a straightforward geometric structure. This simplicity facilitates easy disassembly and reassembly during maintenance operations, unlike complex skewed configurations.
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 effectively reduces mechanical oscillations and spatial harmonics by creating a non-uniform magnetic field, facilitating easier assembly and maintenance of rotor segments in rotating electric machines.
Implementation Method 1
the magnetic guides are configured to house respective magnetic modules and to guide the magnetic flux generated by the magnetic modules to an air gap
Implementation Method 2
guide the magnetic flux generated by the magnetic modules to an air gap
Data Source
Figure 1
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AI summary
A rotor segment of a rotating electric machine, the rotor segment (7) extending along a given plane (PI) and comprising at least two magnetic guides (10), which are aligned along the given plane (PI) and designed to house respective magnetic modules (11) and to guide the magnetic flux generated by the magnetic modules (11) to an air gap (8), wherein each magnetic guide (10) comprises a first and a second face (12, 13) facing the air gap (8) and extending along a first and a second surface respectively; the first surface being greater than the second surface; and the first face (12) of one magnetic guide (10) being aligned with and adjacent to the second face (13) of the other magnetic guide (10).