Wireless Vehicle Charging System Using Cascade Buck-Boost Converter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle charging systems lack the ability to provide a wide range of charging voltage and power required by electric vehicle batteries efficiently, and they are costly due to complex structures and numerous components.
Innovation Solution
A vehicle charging system comprising a power transmitter with a cascade buck-boost power factor correction converter and a power receiver with a bridgeless rectifier, which adjusts output voltage based on switches and magnetic field generation to match battery voltage, using a processor to determine optimal charging mode and coupling coefficients for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional voltage converter is used in the vehicle charging system, then the charging voltage can be regulated, but the system complexity and manufacturing cost increase due to additional components
Solution Approach 1:
The patent combines the voltage conversion function with the magnetic field generation function into a single integrated device. The voltage converter's output is directly coupled to the magnetic field generator, eliminating the need for separate voltage regulation components and reducing system complexity while maintaining adaptability across different charging voltage requirements
Solution Approach 2:
The magnetic field generator is designed to serve dual purposes: generating the magnetic field for wireless power transfer and simultaneously acting as the voltage conversion output stage. This multi-functional design reduces the number of components needed while providing flexible voltage regulation capability
2Adaptability or versatility
If multiple voltage conversion stages are added to expand charging voltage range, then the adaptability improves, but the device complexity and installation cost increase
Solution Approach 1:
The patent employs dynamic control of the magnetic field generator's operating parameters to achieve voltage and power adaptation. By dynamically adjusting the generator's characteristics based on real-time charging requirements, the system achieves wide voltage range coverage without adding multiple fixed-stage conversion devices, thereby reducing manufacturing and installation costs
3Weight of moving object
If the power receiver components are minimized to reduce vehicle weight, then the ease of manufacture improves, but the charging efficiency may be compromised
Solution Approach 1:
The patent replaces traditional mechanical/electrical connection systems with wireless magnetic field-based power transfer. This substitution eliminates the need for heavy physical connectors and complex contact systems in the power receiver, significantly reducing vehicle weight while maintaining high charging efficiency through optimized magnetic coupling
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
The system provides flexible charging voltage and power, reduces manufacturing and installation costs by simplifying the charging structure, and potentially lowers vehicle weight by minimizing power receiver components.
Implementation Method 1
a magnetic field generator configured to generate a magnetic field corresponding to a voltage converted by the voltage converter
Implementation Method 2
a current inductor configured to allow an electrical signal to be induced by the magnetic field generated by the magnetic field generator
Data Source
AI summary
A vehicle charging system includes a power transmitter including at least one voltage converter configured to allow a vehicle charging mode to be changed by a plurality of switches and a magnetic field generator configured to generate a magnetic field corresponding to a voltage converted by the voltage converter; and a power receiver including a current inductor configured to allow an electrical signal to be induced by the magnetic field generated by the magnetic field generator, a rectifier configured to rectify the induced electrical signal and a battery configured to be charged by the electrical signal rectified by the rectifier.