Magnet Pole Winding Geometry for Magnetic Levitation Field Control
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Solution Overview
Problem
Magnetic poles used in magnetic levitation vehicles experience field intensity concentration at sharp-edged areas, leading to point discharges and insulation damage due to high voltage, especially when multiple poles are connected in series and resonate.
Innovation Solution
The conductor strip is tailored to form a wedge shape near the core, with increasing width and smooth edges, reducing field intensity concentration and preventing insulation breakdowns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rectangular conductor strips are used in the winding, then the manufacturing process is simple, but field intensity concentration occurs at the sharp edges leading to point discharges and insulation damage
Solution Approach 1:
The conductor strip is designed with different geometries at different locations: rectangular shape in the central area for simple manufacturing, and tapered/triangular shape at the edges near the core to reduce field intensity concentration. This local differentiation eliminates point discharges at critical areas while maintaining manufacturing simplicity in non-critical areas.
Solution Approach 2:
The sharp rectangular edges of the conductor strip are replaced with tapered or triangular configurations that create smoother transitions and rounded effective edges. This geometric modification reduces the concentration of electrical field intensity at the edges, preventing point discharges and insulation breakdown while maintaining the overall rectangular structure for manufacturing efficiency.
2Power
If multiple magnet poles are connected in series to increase voltage, then the power output increases, but resonance oscillations occur due to parasitic capacities and inductivities
Solution Approach 1:
The parasitic capacities and inductivities that cause resonance oscillations are addressed by modifying the conductor geometry to reduce field intensity concentration. The tapered edges reduce capacitive effects at critical points, thereby dampening resonance oscillations while maintaining the series connection configuration for high voltage output.
3Productivity
If the conductor strip edges are left sharp for manufacturing simplicity, then production is efficient, but high voltage rates cause insulation damage
Solution Approach 1:
The conductor strip maintains simple rectangular geometry in the central manufacturing area for production efficiency, while implementing tapered or triangular configurations only at the edges near the core where field intensity concentration occurs. This localized modification protects insulation integrity without complicating the overall manufacturing process.
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 minimizes peak discharges, enhances operational safety, reduces insulation aging, and maintains efficient heat dissipation while avoiding insulation faults and resonance oscillations.
Implementation Method 1
its longitudinal edges bordering the core lead to a sharp-edged winding geometry that entail a concentration of the electrical field intensity and point discharges at these areas
Implementation Method 2
parasitary capacities combined with inductivities of the magnet poles lead to non-desired resonance oscillations
Data Source
AI summary
A magnetic pole for magnetic levitation vehicles is described which pole comprises a core (1) and a winding (16) applied on it in form of a disc which is formed by a conductor strip (17) wound in several layers (10a) . . . 10k) around said core (1). According to the present invention, the conductor strip (17) is properly tailor-cut at its longitudinal rims (17a, 17b) so that its width increases from said core (1) towards the outside until it reaches a maximum value (b2).