Asymmetric Rotor Lamination Ring Layout for Vibration Reduction
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Solution Overview
Problem
Existing rotor laminated cores for electrical machines experience vibrations and noise, leading to uneven running, which current technologies fail to adequately address.
Innovation Solution
A rotor laminated core design featuring stacked sheet metal rings with V-shaped receiving openings for permanent magnets, arranged asymmetrically around the axis of symmetry, and interconnected using identical annular segments with form-fitting connection systems, allowing for angular displacement and interlocking to reduce vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rotor laminated cores are constructed using conventional symmetric stacking methods, then manufacturing is simplified, but vibrations and noise increase leading to uneven running
Solution Approach 1:
The patent applies asymmetry by rotating alternating laminations by 180 degrees relative to the previous lamination. This creates an asymmetric stacking pattern where the magnetic poles and structural features are offset between adjacent laminations, disrupting the symmetric vibration patterns that cause noise and uneven running, while still maintaining a relatively simple manufacturing process using standard pressing equipment
2Object-affected harmful factors
If asymmetric stacking is used to reduce vibrations, then running uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The rotor lamination stack is segmented into alternating layers with different orientations. By dividing the stack into discrete laminations that can be independently oriented (0 degrees or 180 degrees), the patent achieves vibration reduction through asymmetric stacking while maintaining manufacturing simplicity. Each lamination remains a complete, unchanged component, and the asymmetry is achieved purely through the stacking sequence rather than modifying individual lamination designs
Data Source
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AI summary
The invention relates to a lamination ring (10) for constructing a laminated rotor core (1) for a rotor of an electric machine and to a method for producing a laminated rotor core (1) made of multiple lamination rings (10) for a rotor. The lamination ring (10) has multiple receiving openings (20) for permanent magnets, and multiple structural elements (22) are arranged homogenously in the lamination ring (10) at the same distance to one another in the circumferential direction (U) in a rotated manner by an offset angle (40) relative to the axis of symmetry (S1) such that the arrangement of structural elements (22) is not symmetrical relative to the axis of symmetry (S1) of the lamination ring (10).