Wireless Power Transfer Alignment Control for Lateral Displacement
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in accurately determining lateral positional displacement of vehicles during contactless power transfer, as the processing time for lateral position detection exceeds that of pairing, leading to inefficiencies in alignment and power transfer.
Innovation Solution
The system extends the alignment check time beyond pairing to ensure accurate lateral positional displacement determination, allowing for immediate power transfer resumption when displacement is corrected and transitioning to compatibility check if alignment loss persists, with fine positioning correction by a control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the alignment check time is extended to accurately determine lateral positional displacement, then measurement precision is improved, but productivity deteriorates due to increased processing time
Solution Approach 1:
The system performs pairing using a reception antenna in advance before conducting the alignment check. This preliminary pairing action establishes initial communication and connection, allowing the subsequent alignment check to focus specifically on lateral positional displacement detection without repeating the pairing process, thus reducing overall processing time while maintaining measurement precision
Solution Approach 2:
The power transfer process is divided into distinct stages: pairing stage and alignment check stage. Each stage has dedicated processing time and specific functions. The pairing stage handles initial connection establishment, while the alignment check stage focuses on lateral position detection. This segmentation allows optimization of each stage independently and prevents time conflicts between different processing tasks
2Measurement precision
If the alignment check time is extended beyond pairing time, then lateral position detection accuracy is improved, but the complexity of control logic increases
Solution Approach 1:
The control system dynamically adjusts its behavior based on the relationship between alignment check time and pairing time. When alignment check time is set longer than pairing time, the system enters a specific operational mode that triggers appropriate control actions. This dynamic adaptation allows the system to handle the extended timing requirement without requiring completely new control logic, as it builds upon existing conditional frameworks
3Ease of operation
If pairing is performed by one reception antenna, then ease of operation is improved, but measurement precision of lateral position deteriorates
Solution Approach 1:
The system separates the pairing function from the lateral position detection function. Pairing is handled by a single reception antenna, keeping that operation simple and straightforward. Lateral position detection is performed by multiple reception antennas working together, providing the necessary measurement precision. This functional segmentation allows each subsystem to be optimized for its specific purpose without compromising the other
Solution Approach 2:
The reception antenna system is designed with multi-functionality: individual antennas can perform pairing operations independently, while the array of antennas can collectively perform lateral position detection. This universal design allows the same hardware infrastructure to serve multiple purposes, with different antennas or antenna combinations activated based on the specific operational requirement
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 approach enables precise lateral positional determination and prevents unnecessary corrections, ensuring safe and efficient wireless power transfer by extending alignment check time and incorporating fine positioning to correct vehicle displacement.
Implementation Method 1
performs wireless power transfer by magnetic coupling between a supply device on a ground side and a vehicle in motion
Data Source
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AI summary
A wireless power transfer system according to the present invention is a wireless power transfer system that performs wireless power transfer by magnetic coupling between a supply device on a ground side and a traveling vehicle, the wireless power transfer system including a control device that controls the wireless power transfer from a power transmission unit of the supply device to a power reception unit of the vehicle, in which the control device sets a time of alignment check to be longer than a time of pairing.