Pole Member Holder for Dynamo Electric Machine Winding
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Solution Overview
Problem
Existing methods for winding pole members in electric motors face challenges in achieving precise positioning and alignment of coil turns due to high winding speeds and conductor tension, which affects the accuracy of coil formation.
Innovation Solution
A holder device with angularly positioned seats and preloaded springs to securely hold pole members, combined with a rotating plate mechanism for alignment and a shaft device for angular indexing, ensures accurate positioning and locking of pole members relative to a common reference, allowing for precise winding and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high winding speed is used to increase productivity, then production efficiency is improved, but positioning precision and coil formation accuracy deteriorate
Solution Approach 1:
The pole members are pre-positioned in the holder device with precise angular indexing before the winding operation begins. The shaft device indexes the pole members to predetermined angular positions, and the rotating plate aligns them with a common reference. This preliminary positioning ensures that when high-speed winding occurs, the pole members are already in the correct positions, allowing high productivity without sacrificing coil formation accuracy.
2Strength
If conductor tension is applied during winding to maintain strand integrity, then conductor stability is improved, but positioning precision of coil turns deteriorates
Solution Approach 1:
The holder device provides localized support and positioning features at specific locations where pole members need to be held. The seats with positioning features and the rotating plate provide localized constraints that maintain precise turn positioning even when conductor tension is applied during the winding process. This localized quality ensures that tension does not compromise positioning precision.
3Adaptability or versatility
If variable lamination thicknesses are accommodated in pole members, then adaptability is improved, but alignment precision and positioning accuracy deteriorate
Solution Approach 1:
The holder device incorporates a rotating plate that can dynamically adjust and align pole members with a common reference. The shaft device provides angular indexing that can accommodate variations in pole member dimensions. This dynamic capability allows the system to adapt to varying lamination thicknesses while maintaining alignment precision through active adjustment rather than rigid fixed positioning.
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 solution enables precise alignment and locking of pole members, ensuring accurate coil formation and stability during winding, even with varying lamination thicknesses, and allows for integration with different transport systems and winding devices.
Implementation Method 1
a spring device (19) arranged to act on the pole member (11) with a pushing force in order to compensate for a lamination thickness variation
Data Source
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AI summary
An apparatus and a method for winding turns of coils of pole members (11), in which a pole member (11) comprises at least a flange portion (13b) connected to a body portion (13a) for receiving turns of coils C during winding. The apparatus comprises a conductor dispenser member (50') for dispensing a conductor W for forming turns of coils C by movement of the conductor dispenser member (50') with respect to the pole member being wound. The apparatus is also provided with a pole member holder (10) comprising a plurality of seats (15) suitable for receiving a flange portion (13b) of the pole member (11), a plurality of base members (18) of the seats (15) for engaging a first end (13b") of a pole member (11) with a pushing force and locking means (20) associated with each seat (15) for engaging and referencing a second end (13b') of the pole members (11) with respect to the conductor dispenser member (50'). The invention also concerns a pole member holder (10) as described in the foregoing.