Axial Gap Motor Stator Wiring for Larger Rotor Diameter
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Solution Overview
Problem
Axial gap-type motors face challenges in efficiently connecting power source lines to coils due to limitations in existing electrical connection methods, which restrict the size of the rotor and efficiency of the motor.
Innovation Solution
The axial gap-type motor design includes a stator with split cores and a connection plate that allows power source lines to be connected to coils on the inner side of the stator cores in a radial direction, enabling a larger rotor diameter and efficient electrical connections through press-fitting and routing of connecting lines, facilitating both series and parallel coil connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If power source lines are connected to coils via printed circuit board or electric connecting terminal, then electrical connection is achieved, but the rotor size is restricted and motor efficiency is limited
Solution Approach 1:
The stator core is divided into multiple segments (first stator core, second stator core, etc.) arranged in an annular pattern. This segmentation allows power source lines to be routed through the inner peripheral regions of individual segments, enabling larger rotor diameter while maintaining manageable electrical connection complexity through modular architecture
Solution Approach 2:
The patent transitions from conventional radial or axial wiring approaches to a three-dimensional routing strategy where power source lines extend in the axial direction through the stator core segments and connect to coils at inner peripheral ends. This dimensional change in wire routing enables both larger rotor size and efficient electrical connections
2Power
If conventional electrical connection methods are used, then connection is achieved, but motor efficiency and output are restricted
Solution Approach 1:
Power source lines are pre-routed through the inner peripheral regions of stator core segments before final assembly. This preliminary action simplifies the manufacturing process by establishing electrical connections during the assembly stage rather than requiring complex post-assembly wiring, thereby improving both motor output capability and ease of manufacture
Solution Approach 2:
The stator core segments serve as intermediaries that facilitate the routing of power source lines to the coils. By using the stator core structure itself as the conduit for electrical connections, the patent simplifies the assembly process while enabling more efficient electrical pathways that enhance motor output
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 enhances the motor's output and efficiency by allowing a larger rotor diameter and simplifies the assembly and connection processes, improving the overall performance and versatility of the axial gap-type motor.
Implementation Method 1
a coil wound around each of the stator cores
Data Source
AI summary
An axial gap-type motor includes a rotor and a stator facing the rotor with an air gap interposed between the stator and the rotor in an axial direction of the rotor, in which the stator includes a plurality of stator cores arranged in an annular pattern and a coil wound around each of the stator cores, and outgoing lines drawn out from the coils are electrically connected to power source lines on inner sides in a radial direction of the stator cores relative to inner peripheral ends of the stator cores.