Inductive Power Transfer Authentication via Dual Communication Links
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Solution Overview
Problem
Current inductive power transfer systems face challenges in securely communicating charging-related data between vehicles and control units, ensuring correct vehicle positioning for efficient power transfer, and maintaining electromagnetic compatibility and safety.
Innovation Solution
Implementing two independent communication links for secure data authentication and positioning, where the first link transmits charging-related data and the second link, potentially using short-distance or microwave communication, authenticates and verifies the vehicle's identity and position relative to the primary winding structure, ensuring secure and efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single communication link is used for transmitting charging-related data, then the device complexity is reduced, but the reliability and security of data transmission deteriorates
Solution Approach 1:
The communication system is segmented into two independent communication links: a first communication link for transmitting charging-related data and a second communication link for transmitting authentication-related data. This segmentation allows each link to have specialized functions, improving overall system reliability and security while maintaining manageable complexity through clear functional separation.
2Ease of operation
If the vehicle positioning is not precisely verified, then the ease of operation is improved, but the efficiency of inductive power transfer deteriorates
Solution Approach 1:
The system performs preliminary verification of vehicle positioning and authentication before initiating inductive power transfer. The control unit receives authentication-related data via the second communication link and verifies vehicle identity and position relative to the primary winding structure beforehand, ensuring optimal coupling conditions are met before power transfer begins, thus maximizing efficiency without complicating the user interface.
3Reliability
If authentication verification is implemented, then the reliability of power transfer is improved, but the loss of time in communication increases
Solution Approach 1:
The two communication links operate simultaneously and continuously throughout the docking and power transfer process. The first link continuously transmits charging-related data while the second link continuously verifies authentication, allowing parallel processing that minimizes total communication time while maintaining high reliability through constant verification.
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 ensures secure communication and correct positioning of the vehicle, enhancing the efficiency and safety of inductive power transfer by authenticating data and verifying vehicle identity, thereby optimizing power transfer and reducing operational risks.
Implementation Method 1
a secondary unit with a secondary winding structure for receiving an alternating electromagnetic field and for producing an alternating electric current by electromagnetic induction
Data Source
AI summary
The invention relates to a method of communication between a vehicle and a wayside control unit for controlling an inductive power transfer to the vehicle, wherein the control unit controls a generation of an electromagnetic field by a primary unit with a primary winding structure of a system for inductive power transfer, wherein the vehicle includes a secondary unit with a secondary winding structure for receiving the alternating electromagnetic field, wherein charging-related data is transmitted in between the vehicle and the control unit via a first communication link, wherein the authentication-related data is transmitted from the vehicle to the control unit via a second communication link, wherein the authentication-related data is used to authenticate the charging-related data, and a vehicle and an arrangement of a vehicle and a primary unit.