Resolver Stator Mounting Accuracy via Fixing Point Optimization
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Solution Overview
Problem
Conventional resolver device installation structures can lead to stator distortion, compromising angle detection accuracy, and additional components may not efficiently reduce strain due to differences in strength between thin shield plates and thick stators.
Innovation Solution
The resolver device is designed with a stator having specific winding configurations and fixing points to minimize distortion, where the number of exciting orders, double axial angles, and inner diameter deformation orders are optimized to improve mounting accuracy and reduce waveform distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the resolver stator is fixed to the mounting part with multiple bolts, then mounting accuracy is ensured, but stator distortion occurs due to installation stress
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-positioning the resolver stator with the mounting part before final bolting. The stator is temporarily fixed at multiple positions, and the optimal position that minimizes distortion is determined in advance, then final tightening is performed at that predetermined position.
Solution Approach 2:
The patent changes parameters by optimizing the number, position, and tightening sequence of bolts. By varying these parameters and selecting the combination that produces minimal stator distortion, the patent resolves the contradiction between secure mounting and distortion prevention.
2Strength
If additional components are added to reduce distortion, then strain reduction is attempted, but the effect is insufficient due to strength differences between thin shield plates and thick stators
Solution Approach 1:
The patent extracts the shielding function from a separate shield plate component and integrates it directly into the resolver stator structure. This eliminates the need for additional shield plates while maintaining the distortion reduction effect, as the stator itself provides both structural and shielding functions.
Solution Approach 2:
The patent merges the shield plate and stator into a single integrated structure. By combining these two components, the patent achieves both mechanical support and distortion reduction without requiring separate parts, thereby reducing device complexity while maintaining strength.
3Stability of the object's composition
If the number of fixing points is increased, then mounting stability is improved, but inner diameter deformation of the stator increases
Solution Approach 1:
The patent applies local quality by distributing fixing points non-uniformly around the stator perimeter. Instead of equal spacing, certain regions have more fixing points while others have fewer, optimizing the distribution to maintain mounting stability while minimizing overall inner diameter deformation.
Solution Approach 2:
The patent applies dynamics by using a staged tightening process where fixing points are secured in sequences rather than all at once. This dynamic approach allows gradual stress distribution, maintaining stability while reducing cumulative deformation effects.
Data Source
AI summary
In order to improve the angle detection accuracy, when an exciting order is 2, a double axial angle is 5, and the number of resolver teeth is 8, an inner diameter deformation order is one of 4, 6, 7, 8, or 9, when the exciting order is 5, the double axial angle is 4, and the number of resolver teeth is 10, the inner diameter deformation order is one of 3, 5, 7, 9 or 10, when the exciting order is 3, the double axial angle is 4, and the number of resolver teeth is 12, the inner diameter deformation order is one of the 2, 3, 5, 6, 7, 9, 10, 11 or 12, and the resolver stator is fixed to the resolver device mounting part by the number of fixing points corresponding to any one of the inner diameter deformation order.