Stator Wiring Layout for Shorter Transition Paths in Motors
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Solution Overview
Problem
Existing disk drive motors face challenges in arranging coils efficiently, leading to bulky electric wires and increased Joule loss due to inadequate teaching on coil arrangement.
Innovation Solution
A motor design featuring a stator core with a teeth core and yoke core, where the stator wiring includes coil wires wound around body portions of the teeth and transition wiring connecting these coils, with the transition wiring located inside the body portion along the radius, reducing wire length and Joule loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the coil is arranged in the disk drive motor without specific guidance, then the electric wire becomes bulky, but the Joule loss increases
Solution Approach 1:
The transition wiring is moved from a conventional external arrangement to an internal arrangement within the body portion of the teeth core. This spatial reconfiguration in the radial dimension reduces the wire path length and eliminates bulky external connections, directly addressing both the complexity and energy loss issues
2Ease of manufacture
If the transition wiring is arranged outside the body portion, then the coil winding is easier, but the wire length increases and causes higher Joule loss
Solution Approach 1:
The transition wiring is nested within the body portion of the teeth core, utilizing the internal space rather than occupying external space. This nesting approach shortens the wire length and reduces Joule loss while the body portion structure itself facilitates the winding process
3Loss of energy
If the transition wiring is placed inside the body portion along the radius, then the wire length is reduced and Joule loss decreases, but the manufacturing precision requirement increases
Solution Approach 1:
The body portion is designed with specific local characteristics - its shape and internal structure are optimized to naturally guide and accommodate the transition wiring along the radial direction. This local structural quality ensures proper wiring placement without requiring excessive manufacturing precision across the entire component
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
This configuration reduces the length of transition wiring, minimizing Joule loss and making it easier to wind coils, thereby enhancing motor efficiency and reducing the chances of wire misalignment and deformation.
Implementation Method 1
a coil wire 22 wound around the body portion 421; and transition wiring 23 electrically connecting together a plurality of the coil wires 22
Data Source
AI summary
A motor includes: a stator including a stator core and stator wiring; and a rotor. The stator core includes a teeth core and a yoke core. The teeth core includes: an inner cylindrical portion; and a plurality of teeth, each of which includes a body portion protruding outward from the inner cylindrical portion along a radius of the inner cylindrical portion. The yoke core has a cylindrical shape and is mounted onto the plurality of teeth to surround the plurality of teeth. The stator wiring includes: a coil wire wound around the body portion; and transition wiring electrically connecting together a plurality of the coil wires respectively wound around a plurality of the body portions. The transition wiring is provided in a region located inside the body portion along a radius of the body portion.