Contactless Vehicle Power Coils to Suppress Power Pulsation
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Solution Overview
Problem
Existing contactless power supply systems for vehicles face challenges in minimizing electric power pulsation and system size, leading to increased manufacturing costs and potential battery deterioration due to unstable power input.
Innovation Solution
The system configures primary coils as single-phase or multi-phase coils and secondary coils as multi-phase or single-phase coils, combined with specific resonant circuit types and coil configurations, to simplify the system while reducing electric power pulsation during vehicle travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both primary coils and secondary coils are configured as three-phase coils, then electric power pulsation is reduced, but system size and manufacturing cost increase
Solution Approach 1:
The system segments the three-phase coil configuration into asymmetric arrangements where only one coil (either primary or secondary) maintains full three-phase structure while the other uses simplified single-phase or two-phase configurations. This segmentation reduces the overall system complexity while maintaining power transmission effectiveness through strategic phase distribution.
Solution Approach 2:
The patent applies local quality by creating asymmetric coil configurations where different phases are strategically positioned - for example, placing single-phase or two-phase coils at specific locations relative to the vehicle's movement path. This localized phase distribution optimizes power transfer at critical interaction points while reducing redundant complexity in other areas.
2Reliability
If both primary coils and secondary coils are configured as three-phase coils, then electric power pulsation is reduced, but manufacturing cost increases
Solution Approach 1:
The manufacturing cost reduction is achieved by segmenting the complex three-phase configuration into simpler single-phase or two-phase coil structures for either the primary or secondary side. This segmentation reduces the number of coil windings, connection points, and associated components that require precision manufacturing, thereby lowering production costs while maintaining adequate power transmission performance.
Solution Approach 2:
The patent employs simpler coil configurations (single-phase or two-phase instead of full three-phase) that use fewer materials and simpler construction methods. These simplified coils are more cost-effective to manufacture and install, providing an economical solution that balances performance requirements with manufacturing constraints.
3Device complexity
If unstable power input is supplied to the battery, then system operation is simplified, but battery deterioration occurs
Solution Approach 1:
The asymmetric coil configuration creates a periodic power transmission pattern that naturally smooths power delivery to the battery. By strategically positioning coils with different phase configurations along the vehicle's travel path, the system generates a more consistent power input rhythm that reduces harmful fluctuations and protects battery health during charging operations.
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 effectively suppresses electric power pulsation, reduces system size, and enhances efficiency, thereby lowering manufacturing costs and preventing battery deterioration.
Implementation Method 1
a contactless power supply system for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle
Data Source
AI summary
A contactless power supply system is provided for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle. The contactless power supply system includes a plurality of primary coils installed along a traveling direction in a road and a secondary coil mounted to the vehicle. Each of the primary coils is a single-phase coil with the secondary coil being a multi-phase coil, or is a multi-phase coil with the secondary coil being a single-phase coil.