Inductive Charging Coil Layout for Safe Vehicle Positioning
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Solution Overview
Problem
Existing inductive charging systems face challenges in efficiently positioning vehicles for optimal energy transfer while ensuring safety and maximizing the range of positioning signals without exceeding safe magnetic field limits, particularly in scenarios where vehicles are moving or stationary.
Innovation Solution
The proposed inductive charging device incorporates a positioning signal winding designed as a solenoid with a winding axis aligned in the vehicle's longitudinal direction, encasing at least one flow guide element and energy transfer winding, which generates positioning signals with a homogeneous magnetic field for efficient vehicle alignment and energy transfer, while maintaining safe magnetic field densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the positioning signal winding is designed as a solenoid enclosing flow guide elements and energy transfer winding, then the range and homogeneity of positioning signals are improved, but the device complexity increases
Solution Approach 1:
The positioning signal winding is designed as a solenoid that encloses the flow guide elements and energy transfer winding in a nested configuration. This nesting arrangement allows the positioning signal winding to generate a homogeneous magnetic field across the charging area while efficiently utilizing the space within the inductive charging device, thereby improving positioning signal quality without excessive increase in device complexity
Solution Approach 2:
The flow guide elements serve dual functions: they guide the magnetic field during energy transfer processes and are simultaneously enclosed by the positioning signal winding to enhance positioning signal homogeneity. This multi-functionality reduces the need for separate components, balancing improved positioning precision with controlled device complexity
2Length of moving object
If the positioning signal range is extended to cover larger areas, then the safe magnetic field density limits may be exceeded, but the positioning capability is improved
Solution Approach 1:
The solenoid configuration of the positioning signal winding with its specific winding axis orientation and enclosure of flow guide elements creates a magnetic field distribution that extends the effective positioning signal range while maintaining safe magnetic field density levels through the field-guiding properties of the enclosed flow guide elements
3Power
If the inductive charging device operates at high power for efficient energy transfer, then the risk of winding destruction increases, but the charging efficiency is improved
Solution Approach 1:
The positioning signal winding encloses the energy transfer winding in a solenoid configuration that provides magnetic field guidance and protection. This nested arrangement acts as a protective structure that guides and contains the magnetic field during high-power operation, reducing the risk of winding destruction while enabling efficient high-power energy transfer
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 design enhances the range and safety of positioning signals, allowing for efficient energy transfer with reduced risk of winding destruction, even at close distances, by optimizing magnetic field guidance and alignment, thus ensuring reliable and high-power charging operations.
Implementation Method 1
the positioning signal winding is designed as a solenoid with a winding axis in the longitudinal direction of the vehicle or target vehicle longitudinal direction
Implementation Method 2
an energy transfer winding in an inductive charging device generates an alternating magnetic field. This alternating magnetic field induces a voltage in another energy transfer winding
Implementation Method 3
at least one flow guide element which is suitable for conducting a magnetic field during an energy transfer process to or from the inductive charging device
Data Source
AI summary
An inductive charging device for a vehicle charging system may include an energy transfer winding, at least one positioning signal winding, and at least one flow guide element. The positioning signal winding may be structured as a solenoid with a winding axis extending in at least one of a longitudinal direction of a vehicle and a target vehicle longitudinal direction. The flow guide element may be configured to guide a magnetic field during an energy transfer process between a further inductive charging device and the energy transfer winding. The positioning signal winding may enclose the flow guide element and/or the energy transfer winding.