Motor Coil Configuration for Intermediate Turn Counts
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Solution Overview
Problem
Existing AC motor designs face challenges in setting the optimal number of coil turns due to significant jumps in coil turns when trying to maintain a space factor, leading to reduced productivity and inability to achieve user-demanded output characteristics.
Innovation Solution
The motor design features a stator and mover with coil groups where each phase includes two continuously arranged in-phase coils with the same wire diameter, one coil width larger and one narrower than the slot pitch, allowing for increased flexibility in wire diameter selection and continuous winding without gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If coils with two kinds of wire diameters are used to adjust the number of turns, then the degree of freedom in coil turns is improved, but the manufacturing complexity and space factor are worsened
Solution Approach 1:
The patent applies local quality by making one coil wider than the slot pitch while keeping another coil narrower, allowing different local regions to have different dimensions. This enables intermediate number of turns to be achieved without changing wire diameter, thus maintaining manufacturing simplicity while improving adaptability in coil turn configuration
Solution Approach 2:
The patent segments the coil configuration into multiple coils with different widths (one wider than slot pitch, one narrower) arranged continuously. This segmentation allows the total effective width to achieve intermediate values, providing degree of freedom in coil turns while maintaining uniform wire diameter and simple manufacturing processes
2Adaptability or versatility
If the number of coil turns is adjusted to achieve user-demanded output characteristics, then the adaptability is improved, but the productivity is worsened due to significant jumps in coil turns
Solution Approach 1:
The patent changes the geometric parameter of coil width instead of wire diameter to achieve intermediate number of turns. By making one coil wider than the slot pitch and another narrower, the effective width can be adjusted continuously, providing adaptability in output characteristics without causing significant jumps in coil turns, thus maintaining high productivity
3Adaptability or versatility
If coils with different wire diameters are used to achieve intermediate number of turns, then the degree of freedom in coil turns is improved, but the space factor is worsened
Solution Approach 1:
The patent applies local quality by varying coil widths locally (one wider, one narrower than slot pitch) while maintaining uniform wire diameter throughout. This local dimensional variation achieves intermediate number of turns without compromising the overall space factor, as the continuous arrangement of coils with same wire diameter maintains efficient space utilization
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 allows for an intermediate number of turns, improving the degree of freedom in coil turns, enhancing productivity, and achieving user-specific output characteristics while maintaining a high space factor and motor constant.
Implementation Method 1
A disclosed embodiment relates to an AC motor... The stator and the mover are arranged facing each other so as to be relatively movable via a magnetic air gap
Data Source
AI summary
The disclosure discloses a motor including a stator and a mover. The stator and the mover are arranged facing each other so as to be relatively movable via a magnetic air gap. Any one of the stator and the mover includes a yoke, a plurality of teeth, and a plurality of coils. The plurality of teeth are disposed protruding from the yoke to the magnetic air gap side. The plurality of coils are wound around the plurality of teeth. The plurality of coils include, for each phase, coil groups. Each of the coil groups includes a plurality of the coils. The coils are continuously arranged along the relative movement direction and are in-phase with each other and have the same wire diameter with each other. The coil group includes at least one the coil in which a coil width is larger than a teeth pitch.