Secondary Coil Unit With Removable Cover For Undercarriage Access
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Solution Overview
Problem
Existing inductive charging systems for electric vehicles face challenges in accommodating large secondary coils for high charging capacities without interfering with other vehicle components and ensuring safe access to undercarriage components.
Innovation Solution
A secondary coil unit with a removable cover and housing that allows for access to undercarriage components, utilizing ferromagnetic or ferrimagnetic materials to enhance coupling and inductance, and segmented housing layers for increased robustness and reduced magnetic resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the secondary coil size is increased to achieve higher charging capacity, then the charging power increases, but the space requirements and interference with other vehicle components increase
Solution Approach 1:
The secondary coil is divided into multiple segments arranged in a circular pattern, allowing the coil to achieve high charging capacity through distributed winding while reducing the overall space footprint and enabling better integration with other undercarriage components
2Power
If the secondary coil size is increased to achieve higher charging capacity, then the charging power increases, but the access to other undercarriage components becomes difficult
Solution Approach 1:
The segmented coil design allows sections to be independently accessed or removed, facilitating maintenance and access to underlying components while preserving the overall high-capacity charging function
Solution Approach 2:
The coil structure incorporates movable or removable sections that can be dynamically adjusted or taken away when access to underlying components is required, enabling both high charging capacity and component accessibility
3Reliability
If a housing structure is added to protect and provide access to the secondary coil, then the component protection and access improve, but the device complexity increases
Solution Approach 1:
The housing structure serves multiple functions simultaneously: it protects the secondary coil, provides service access through openings, and maintains the coil's positional stability, thereby reducing overall device complexity through functional integration
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 the use of large secondary coils for increased charging capacity while ensuring safe and efficient access to vehicle components, with a cost-effective and robust design that minimizes damage and operational risks.
Implementation Method 1
The primary coil 111 is connected to a power supply 113. The power supply 113 can include a radio frequency generator and/or an inverter, which generates AC (alternating current) in the primary coil of the WPT floor unit 110, as a result of which a magnetic field (in particular an electromagnetic charging field) is induced.
Implementation Method 2
When there is a sufficient magnetic coupling between the primary coil 111 of the WPT floor unit 110 and the secondary coil 121 of the WPT vehicle unit 120 via the undercarriage clearance 130, a corresponding voltage and thus a current is induced in the secondary coil 121 by the magnetic field.
Implementation Method 3
utilizing ferromagnetic or ferrimagnetic materials to enhance coupling and inductance
Data Source
AI summary
A secondary coil unit for a vehicle has a housing with a cover that can be removed from the housing. The secondary coil unit further has a secondary coil which is arranged in the housing and surrounds a core region. The cover and the housing are designed in such a way that an opening through the secondary coil unit is created when the cover is removed from the housing.