Movable Inductive Charging Pad With Integrated Inverter Layout
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Solution Overview
Problem
Current inductive power transfer pads, especially those with movable parts, face issues of high production costs and reliability due to complex electrical connections, increased size, and inefficient cooling of power electronics, which are exacerbated by the separation of power electronics and primary winding structures between stationary and movable parts.
Innovation Solution
Integrating both the inverter and primary winding structure into the movable part of the inductive power transfer pad, reducing the length and stress on electrical connections, allowing for a more compact design, and using a movable part that encapsulates the power electronics and winding structure for improved reliability and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If power electronics and primary winding structure are separated between stationary and movable parts, then device complexity is reduced for maintenance, but reliability decreases due to cable stress and connection damage risk
Solution Approach 1:
The system is segmented into a stationary control unit and a movable power transfer unit. The stationary unit houses the inverter and control electronics, while the movable unit contains the primary winding structure. This segmentation allows maintenance of each module independently while reducing cable stress through optimized connection design.
2Temperature
If power electronics are placed in the stationary part, then cooling is easier, but device complexity increases due to multiple electrical interfaces and sealing requirements
Solution Approach 1:
The power electronics (inverter) are extracted from the movable unit and placed in the stationary control unit. This extraction eliminates the need for complex waterproof sealing and multiple electrical interfaces in the movable unit, while the stationary unit benefits from easier access for cooling and maintenance.
3Adaptability or versatility
If primary winding structure is in the movable part only, then adaptability to vehicle movement is improved, but production costs increase due to separate housing requirements
Solution Approach 1:
The primary winding structure is merged with the movable power transfer unit housing, creating an integrated assembly. This merging reduces the number of separate components and housing requirements, thereby lowering production costs while maintaining full adaptability to vehicle movement.
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 configuration reduces the risk of connection damage, decreases production costs, and enhances the reliability and efficiency of the inductive power transfer by minimizing the number of electrical interfaces and enabling better heat management through airflow and thermal conduction.
Implementation Method 1
a circuit arrangement, which can be a traction system or a part of a traction system of the vehicle, comprising a receiving device adapted to receive an alternating electromagnetic field and to produce an alternating electric current by electromagnetic induction
Implementation Method 2
The DC can be converted into an AC by means of an inverter
Implementation Method 3
The DC can be used to charge a traction battery or to operate an electric machine
Data Source
AI summary
An inductive power transfer pad for inductive power transfer to a vehicle includes a stationary part and a movable part. The movable part is movable between a retracted state and an extended state. The movable part includes a primary winding structure and at least one inverter that is electrically connected to the primary winding structure.