Stator Loop Wire Radial Positioning for Compact Motor Design
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Solution Overview
Problem
The challenge is to create a compact stator for electric motors that optimizes volume, particularly in radial direction, for applications in mobile environments like vehicles, where existing stator configurations are not sufficiently compact.
Innovation Solution
A stator design featuring a stator core with consecutively arranged teeth and coils grouped into phase groups, with loop wires connecting coils in series at the radially inner portion and end wires connected to a power source, allowing for a compact structure without increasing radial dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If conventional stator configurations are used, then the stator can provide sufficient structural strength and electrical connectivity, but the radial volume is too large for mobile applications
Solution Approach 1:
The patent repositions loop wires from the conventional outer circumferential region to the radially inner portion of the stator core, utilizing previously underutilized inner space. This dimensional relocation reduces radial volume occupation while maintaining electrical connectivity functions.
Solution Approach 2:
Loop wires are positioned within the radially inner portion of the stator core, effectively nesting the wire arrangement within the existing stator structure. This nested configuration eliminates the need for additional radial space while maintaining all necessary electrical connections.
2Length of stationary object
If loop wires are positioned at the outer circumferential portion, then wire routing is simplified, but the stator radial dimensions increase
Solution Approach 1:
The patent moves loop wire positioning from the conventional outer circumferential dimension to the radially inner dimension, creating a new spatial arrangement that reduces radial length while providing alternative routing paths through the inner portion of the stator core.
3Volume of stationary object
If the stator structure is compacted in radial direction, then volume is reduced for mobile applications, but manufacturing precision requirements increase
Solution Approach 1:
By nesting loop wires within the radially inner portion of the stator core, the patent creates a compact configuration where wire positions are constrained within a defined inner region, providing natural positioning references that can facilitate manufacturing while achieving reduced overall volume.
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 design achieves a compact stator structure in the radial direction, enabling efficient energy generation while maintaining compactness, suitable for mobile applications.
Implementation Method 1
a plurality of coils wound around respective teeth of the plurality of teeth. The plurality of coils may be grouped into a plurality of phase groups
Data Source
AI summary
A stator for an electric motor may have a substantially annular shape centered around a central axis and may include a stator core having a plurality of teeth consecutively arranged in a circumferential direction, and a plurality of coils wound around respective teeth of the plurality of teeth. The plurality of coils may be grouped into a plurality of phase groups. The stator may include in association with the respective phase groups: at least one loop wire connecting at least two coils of the respective phase group in series with each other with the at least one loop wire being positioned at a radially inner portion of the stator, and at least two end wires respectively connected to two end coils of the respective phase group. The at least two end wires may be configured to be connected to a power source to energize the coils of the respective phase group.