Annular Silicon Steel Slot Geometry for Circular Wire Fill Factor
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Solution Overview
Problem
Conventional circular wire motors experience distortion and twisting of wires in the winding slot, leading to a low slot fill factor and compromised performance due to disorderly arrangement and large gaps between wires.
Innovation Solution
An annular silicon steel sheet with funnel-shaped open slots is used to form a winding slot in circular wire motors, allowing wires to move towards the sides and reduce gaps, improving the slot fill factor and motor performance by arranging wires more regularly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If circular wires are placed in a conventional winding slot, then the wires can be installed, but the wires become distorted and twisted, leading to a low slot fill factor
Solution Approach 1:
The winding slot is designed with a curved cross-section shape that matches the circular cross-section of the wires. The slot includes a bottom surface and two side surfaces that form a curved configuration, allowing circular wires to be arranged in a regular pattern without distortion or twisting, thereby improving both wire arrangement regularity and slot fill factor
Solution Approach 2:
The slot geometry is specifically optimized in the radial direction with a curved cross-section, while maintaining standard dimensions in other directions. This localized geometric modification at the slot level enables proper wire arrangement without affecting other motor components
2Quantity of substance
If circular wires are placed in a conventional winding slot, then the wires can be installed, but large gaps exist between wires, affecting motor performance
Solution Approach 1:
The curved cross-section design of the winding slot naturally accommodates circular wires, eliminating gaps between adjacent wires when they are arranged in the slot. This geometric match simplifies the wire installation process while maximizing the slot fill factor
3Ease of operation
If circular wires are distorted and twisted in the winding slot, then wires can be installed, but the slot fill factor decreases and motor performance is compromised
Solution Approach 1:
The curved cross-section of the winding slot prevents wire distortion and twisting by providing a geometric configuration that naturally supports circular wire shapes. This maintains wire integrity during installation and ensures optimal motor performance
Data Source
AI summary
An annular silicon steel sheet, a circular wire motor assembly, a circular wire motor, and a powertrain. The annular silicon steel sheet includes a plurality of open slots, each open slot penetrates the silicon steel sheet in an axial direction of the silicon steel sheet, and a projection of each open slot in the axial direction of the silicon steel sheet includes a first curve segment, a second curve segment, and a third curve segment. The first curve segment and the third curve segment are oppositely arranged in a circumferential direction of the silicon steel sheet, a bending direction of the first curve segment is away from a bending direction of the third curve segment, and a bending direction of the second curve segment is away from an opening of the open slot. The open slots improve the performance of the circular wire motor and the powertrain.