EV Wireless Charging Pad Core Structure for Misalignment Tolerance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transfer systems for electric vehicles are susceptible to variations in inductive coupling due to misalignment or positional changes of the transmission and reception pads, leading to inefficiencies and non-uniform power transfer.
Innovation Solution
A core structure design for the power transfer system that includes elongated magnetic core sections extending in multiple axes to maintain a robust magnetic path despite misalignments and positional variations, ensuring uniform performance by considering the shape and position of the electric vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional wireless power transfer system uses standard coil alignment, then the system structure is simple, but the power transfer efficiency varies significantly due to misalignment or positional changes
Solution Approach 1:
The magnetic core is divided into multiple sections (first magnetic core section, second magnetic core section, third magnetic core section) arranged in different spatial orientations. Each section contributes to maintaining the magnetic flux path under different alignment conditions, allowing the system to maintain reliable power transfer through segmented structural components rather than a single complex core.
2Adaptability or versatility
If the transmission pad and reception pad are perfectly aligned, then power transfer is efficient, but the system is highly sensitive to positional variations and misalignment
Solution Approach 1:
The magnetic core structure extends in multiple spatial dimensions with sections oriented differently in space. This multi-dimensional configuration ensures that the magnetic flux path remains intact even when positional variations occur in any direction, providing adaptability to misalignment without significant energy loss.
3Reliability
If the magnetic core structure is designed to compensate for misalignment, then the system becomes robust to positional variations, but the manufacturing complexity increases
Solution Approach 1:
Different sections of the magnetic core are positioned and oriented to address specific misalignment scenarios. Each local section of the magnetic core has a tailored configuration optimized for maintaining flux continuity in particular directional variations, allowing the overall system to achieve uniform power transfer while using relatively simple, manufacturable local components.
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 system maintains consistent power transfer efficiency by compensating for misalignments and positional changes in both vertical and horizontal directions, enhancing the reliability and uniformity of wireless charging.
Implementation Method 1
A voltage is induced in the reception pad by a time-varying magnetic field generated by the transmission pad
Implementation Method 2
a first magnetic core device being a part of a magnetic core and corresponding to a core of a primary coil... a second magnetic core device being another part of the magnetic core and extending from an end of the first magnetic core device
Data Source
AI summary
A power reception device is disposed in an electric vehicle to receive electric power from an electric vehicle supply equipment (EVSE). The power reception device includes: a first magnetic core portion being a part of a magnetic core and corresponding to a core of a primary coil in a power transmission device of the EVSE; a secondary coil wound around the first magnetic core portion; and a second magnetic core portion being another part of the magnetic core and extending from an end of the first magnetic core portion.