Stator Winding Layout for Lower Voltage Drop and Torque Ripple
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Solution Overview
Problem
Existing motor designs face challenges in reducing internal voltage drop and energy loss, which affects insulation reliability and energy conversion efficiency.
Innovation Solution
The motor design incorporates a stator with a specific winding arrangement, where conductor layers are arranged in a manner that reduces voltage drops between adjacent conductors, improving insulation reliability and energy efficiency. This design includes a short-pitch winding structure that reduces winding harmonics and torque ripple.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional winding arrangements are used, then the motor can achieve basic operational function, but the internal voltage drop is large and energy loss increases
Solution Approach 1:
The patent applies local quality by creating different conductor layer arrangements in different regions (first region with L1-Ln layers, second region with Ln/2+1-Ln layers, third region with L1-Ln/2 layers). This regional differentiation optimizes the voltage drop characteristics in each specific area, reducing overall internal energy loss while maintaining insulation reliability through localized structural optimization.
Solution Approach 2:
The winding structure is segmented into multiple conductor layers (L1 to Ln) arranged in distinct first, second, and third regions within each winding slot. This segmentation allows independent optimization of each layer's position and connection, enabling reduced voltage drop between adjacent conductors while maintaining proper insulation spacing, thus addressing both energy loss and reliability concerns.
2Productivity
If conventional winding structures are used, then the motor can operate, but voltage drop between adjacent conductors is large reducing efficiency
Solution Approach 1:
The patent implements local quality by arranging conductor layers L1-Ln in the first region, Ln/2+1-Ln in the second region, and L1-Ln/2 in the third region. This localized arrangement minimizes the voltage drop between adjacent conductors in each specific region, thereby reducing overall voltage drop loss and improving energy conversion efficiency without compromising motor operation.
Solution Approach 2:
The patent introduces a dimensional approach by organizing conductors into multiple layers (L1 to Ln) stacked vertically within winding slots, rather than simple planar arrangements. This multi-dimensional layering allows optimization of current paths and reduces the effective distance between adjacent conductors of different phases, minimizing voltage drop and improving productivity.
3Stability of the object's composition
If standard winding arrangements are used, then the motor functions normally, but winding harmonics and torque ripple are significant
Solution Approach 1:
The patent applies local quality by creating region-specific conductor arrangements where L1-Ln layers are in the first region, Ln/2+1-Ln in the second region, and L1-Ln/2 in the third region. This localized structural differentiation optimizes the magnetic field distribution in each region, reducing winding harmonics and resulting torque ripple, thereby improving torque stability while the motor functions normally.
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
The proposed design effectively reduces voltage drops between conductors, enhancing insulation reliability and energy conversion efficiency while also reducing winding harmonics and improving noise vibration.
Implementation Method 1
The motor includes a stator and a rotor. The stator has a stator iron core and a stator winding provided at the stator iron core
Data Source
AI summary
A stator includes a stator iron core and a stator winding provided at the stator iron core. The stator iron core has a plurality of winding slots formed in an inner wall thereof. The stator winding includes a conductor inserted in the plurality of winding slots. The stator winding includes a plurality of phase windings, and each of the plurality of phase windings includes a first branch and a second branch.