Crossing Subwinding Layout for Inductive Power Transfer
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Solution Overview
Problem
Inductive power transfer systems for electric vehicles face issues such as local eddy currents, stray magnetic fields, and increased electric potential along conductor lengths, leading to inefficiencies and potential electrical short-circuits, which are often mitigated by adding capacitors that increase size and cost.
Innovation Solution
A conductor arrangement with crossing conductor segments that connect subwindings in series, reducing electric potential differences and allowing for a more regular electromagnetic field without the need for additional capacitors, thereby enhancing efficiency and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional capacitors are arranged between poles or subwindings to limit potential values, then electrical safety is improved, but device complexity and size increase
Solution Approach 1:
The invention removes the harmful element (capacitors) from the system by redesigning the conductor arrangement. The crossing conductor segments inherently limit potential differences through their geometric configuration, making additional capacitors unnecessary and enabling their extraction from the system.
Solution Approach 2:
The invention introduces a spatial dimension solution by arranging conductor segments in three-dimensional crossing configurations. This geometric approach in multiple dimensions provides a new mechanism for controlling electrical potential, replacing the traditional two-dimensional planar arrangement that requires capacitors.
2Reliability
If additional capacitors are arranged between poles or subwindings to limit potential values, then electrical safety is improved, but manufacturing cost increases
Solution Approach 1:
The invention extracts and eliminates the need for additional capacitor components from the system. The crossing conductor arrangement inherently provides electrical safety through its geometry, removing the requirement for extra components and associated manufacturing costs.
3Ease of operation
If connectors and electrical connections are positioned outside the plane of subwindings, then electrical connection is achieved, but electromagnetic field regularity deteriorates
Solution Approach 1:
The invention moves the solution into the third dimension by positioning conductor crossings above or below the subwinding plane rather than within it. This vertical displacement in another dimension allows electrical connections while preserving the planar symmetry and regularity of the electromagnetic field generation area.
Solution Approach 2:
The invention introduces asymmetric positioning of connectors and crossings relative to the subwinding plane, placing them above or below rather than within the plane. This controlled asymmetry in the vertical dimension resolves the conflict between connection accessibility and field regularity.
4Volume of moving object
If conductor segments are arranged in a compact configuration, then device size is reduced, but electric potential difference between adjacent segments increases
Solution Approach 1:
The invention resolves the compactness-safety conflict by utilizing the third dimension. Crossing conductor segments are positioned above or below the main subwinding plane, allowing compact horizontal arrangement while maintaining safe potential differences through vertical separation at crossing points.
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 improves the safety and efficiency of inductive power transfer by minimizing electromagnetic disturbances and eliminating the need for additional components like capacitors, resulting in a more compact and cost-effective system.
Implementation Method 1
a receiving device adapted to receive an alternating electromagnetic field and to produce an alternating electric current by electromagnetic induction
Implementation Method 2
a rectifier adapted to convert an alternating current (AC) to a direct current (DC)
Implementation Method 3
The DC can be converted into an AC by means of an inverter
Implementation Method 4
The primary winding structure(s) and the secondary winding structure(s) form a high frequency transformer to transfer electric energy to the vehicle
Data Source
AI summary
A conductor arrangement for an inductive power transfer wherein a conductor is arranged so as to form at least a first subwinding and a second subwinding that are arranged next to one another, such that at least one conductor segment of each of the first and second subwinding run alongside one another in a first conductor bundle of the conductor arrangement. In the first conductor bundle, the first subwinding and the second subwinding are connected to one another via a first connecting conductor segment that crosses at least one further conductor segment of the conductor arrangement. A system for an inductive power transfer having at least two respective conductor arrangements, and a method for manufacturing a conductor arrangement are also disclosed.