Inductive Vehicle Charging Alignment With Dual-Range Positioning
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Solution Overview
Problem
Existing inductive charging systems face challenges in accurately determining positional deviations between mobile and stationary charging devices over a wide range of distances, leading to inefficiencies in positioning and potential inaccuracies, especially when manual or automated assistance is required for precise alignment.
Innovation Solution
The use of a combined short-proximity and long-proximity positioning system, comprising short-proximity and long-proximity transmitter units, and sensor windings to generate and receive alternating magnetic fields for precise positioning, allowing for accurate alignment at both close and distant distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single positioning method is used, then the device complexity is reduced, but the measurement precision deteriorates at minimum bar level distances
Solution Approach 1:
The positioning system is segmented into two distinct methods: a first positioning method using a single winding system for long distances, and a second positioning method using a double winding system for short distances. This segmentation allows each method to be optimized for its specific distance range, preventing the precision deterioration that occurs when a single method is used across all distances.
Solution Approach 2:
The system changes the operational parameters by switching between different positioning methods based on distance. The control unit determines which positioning method to use based on the detected distance, thereby adapting the measurement parameters to match the operational conditions and maintain precision across varying distances.
2Adaptability or versatility
If the positioning range is extended to cover wide distances, then the adaptability is improved, but the measurement precision deteriorates at close distances
Solution Approach 1:
The positioning system divides the operational distance range into segments: a first distance range covered by the first positioning method and a second, shorter distance range covered by the second positioning method. This segmentation enables the system to adapt to wide distances while maintaining precision at close distances by using the appropriate method for each segment.
Solution Approach 2:
The system dynamically switches between positioning methods based on the detected distance. The control unit adjusts the positioning approach in real-time, transitioning from the first positioning method at longer distances to the second positioning method at shorter distances, thereby maintaining both wide adaptability and close-range precision.
3Ease of operation
If manual positioning is used, then the ease of operation is improved, but the positioning precision deteriorates requiring assistance systems
Solution Approach 1:
The system provides feedback to the driver through the assistance system by detecting positional deviations using the dual positioning methods and communicating this information. This feedback loop enables manual positioning to remain easy to operate while achieving high precision through the sophisticated sensor evaluation and driver guidance.
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
Enables precise positioning over a wide range of distances, ensuring efficient energy transfer while maintaining safety and reducing the need for initial calibration, supporting both manual and automated alignment methods.
Implementation Method 1
an energy transmission winding in an inductive charging device generates an alternating magnetic field. This alternating magnetic field induces a voltage in a further energy transmission winding of a further inductive charging device
Implementation Method 2
The magnetic field of the primary coil induces a voltage in the two windings
Data Source
AI summary
An inductive charging device for a vehicle charging system may include an energy transmission winding, at least one flux guiding element, a short-proximity positioning transmitter unit configured to provide at least one short-proximity positioning signal, and a long-proximity positioning transmitter unit configured to provide at least one long-proximity positioning signal.