Magnetic Vectoring Alignment for EV Wireless Charging
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Solution Overview
Problem
Current wireless charging systems for electric vehicles face inefficiencies and alignment challenges due to the need for physical connections and lack of precise positioning methods, particularly in dynamic charging scenarios where tight coupling is required for efficient power transfer.
Innovation Solution
The implementation of a magnetic vectoring system using at least three co-planar coils on a magnetically permeable substrate to sense and generate magnetic field components, providing vector outputs for precise positioning and alignment between the charging base and the electric vehicle, enabling efficient wireless power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If inductive charging is used for wireless power transfer, then power transfer capability is improved, but alignment precision requirements increase
Solution Approach 1:
The system performs preliminary alignment actions by detecting the vehicle's position relative to the charging base before initiating full power transfer. The guidance system provides real-time feedback to guide the vehicle into the optimal coupling position, ensuring proper alignment is achieved beforehand to enable efficient inductive charging.
Solution Approach 2:
A magnetic field detection system serves as an intermediary between the vehicle and charging base. This intermediary detects the vehicle's position and provides guidance information, mediating the alignment process without requiring direct physical contact or complex mechanical positioning mechanisms.
2Loss of energy
If tight coupling is required for efficient inductive charging, then power transfer efficiency is improved, but system complexity increases
Solution Approach 1:
The system employs self-service mechanisms where the vehicle's own magnetic field interactions with the charging base provide natural feedback for positioning. The vehicle automatically receives guidance information based on its position relative to the charging base, enabling self-alignment without complex external control systems.
Solution Approach 2:
Real-time feedback is provided to the vehicle based on its detected position relative to the charging base. This feedback loop allows the system to maintain optimal coupling conditions by continuously monitoring and guiding the vehicle's position, ensuring efficient power transfer while simplifying the overall control architecture.
3Manufacturing precision
If manual alignment intervention is required, then alignment accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The system replaces manual mechanical alignment operations with an automated magnetic field-based detection and guidance system. Instead of requiring drivers to manually position the vehicle, the system uses magnetic field sensing to detect position and provides automated guidance information, substituting mechanical alignment efforts with field-based detection and information processing.
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 solution enhances the efficiency and convenience of wireless charging by ensuring accurate alignment and optimal coupling between the charging base and the vehicle, improving power transfer efficiency and reducing the need for manual intervention.
Implementation Method 1
at least three co-planar coils disposed on the magnetically permeable substrate, configured to generate signals induced by a received magnetic field
Implementation Method 2
a magnetically permeable substrate, at least three co-planar coils disposed on the magnetically permeable substrate
Data Source
AI summary
Guidance and alignment systems are disclosed for wireless charging systems to assist in aligning the transmitter and receiver inductive power transfer (IPT) couplers. These systems guide positioning and alignment to provide sufficient coupling between the transmitter and receiver IPT couplers. Exemplary systems provide a magnetic field sensor, magnetic field generator, and magnetic vectoring to determine a position of an electric vehicle or a wireless charging base. In a magnetic vectoring system, an alignment system comprising at least three coils (or similar circuits) on a magnetically permeable substrate receives a positioning magnetic field including modulated information signals and processes the received signal to generate an output for determining a position of the positioning magnetic field source relative to the magnetic field sensor position. The alignment system may further comprise a similar structure that generates the positioning magnetic field, that may include modulated information signals, based on input signals.