Stator Conducting Wire Bending for Pump Stability
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Solution Overview
Problem
In brushless motors, conducting wires can loosen or warp, leading to improper positioning and disengagement from their engaging parts due to tension, causing mechanical instability and performance issues.
Innovation Solution
A stator design with a conducting wire engaging part that includes a bending portion with a smaller diameter than the rest of the wire, allowing for plastic deformation and maintaining the bent state, preventing disengagement and movement of the wire from its intended position, and featuring guide grooves and skew positioning to enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the conducting wire is placed under tension to prevent loosening or warping, then the coil stability is improved, but the conducting wire may move from its appropriate position and disengage from the engaging part
Solution Approach 1:
The conducting wire is designed with non-uniform diameter, where a specific portion has a smaller diameter than other portions. This local variation allows the smaller diameter portion to be plastically deformed and bent to engage with the engaging part, while the rest of the wire maintains its structural integrity under tension. The local quality change enables the wire to simultaneously maintain stability and secure engagement.
Solution Approach 2:
The conducting wire is pre-bent at a specific portion to a predetermined curvature radius before engagement. This preliminary deformation creates an engaged state where the bent portion fits into the engaging part, establishing a secure connection before the wire is placed under tension during operation. The pre-applied action prevents disengagement under subsequent loading.
2Reliability
If the conducting wire is bent to engage with the engaging part, then the engagement reliability is improved, but the wire may deform under tension and disengage
Solution Approach 1:
By creating a local diameter reduction at a specific portion of the conducting wire, the design enables this portion to undergo plastic deformation for engagement while the rest of the wire maintains its original shape and structural stability. The localized property change allows the bent portion to conform to the engaging part geometry, securing reliable engagement without compromising overall wire stability under tension.
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 suppresses deformation and disengagement of the conducting wire, maintaining its position and preventing mechanical instability, ensuring reliable operation under tension.
Implementation Method 1
The conducting wire may be plastically deformed at the bending portion to be kept in a bent state
Data Source
AI summary
A stator may comprise: a core having a tubular shape and comprising a tooth extending toward a central axis of the tubular shape; a conducting wire engaging part projecting from an axial end of the core in an axially outward direction from the core; and a coil disposed on the tooth by winding a conducting wire on the tooth. An end of the conducting wire may be bent at a bending portion. The conducting wire may engage with the conducting wire engaging part at the bending portion. A diameter of the conducting wire at the bending portion may be smaller than a diameter of the conducting wire at another portion of the conducting wire.