Modular Wireless Power Transfer System with Wired Mode
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Solution Overview
Problem
Existing wireless power transfer (WPT) systems face challenges in achieving high efficiency while minimizing magnetic emission and cost, particularly in high power applications, and often cause electromagnetic interference (EMI) and noise, posing hazards to people and electronic devices.
Innovation Solution
The implementation of a modular WPT system that incorporates a plurality of power converters, resonator blocks, and connection blocks, allowing for operation in both wireless and wired charging modes, with advanced resonant power conversion techniques to enhance efficiency and reduce EMI by sharing components and using switchable capacitors to optimize magnetic field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless power transfer is implemented at high power levels, then power delivery capability is improved, but electromagnetic interference and magnetic emission increase causing hazards to people and electronic devices
Solution Approach 1:
The WPT system is divided into multiple independent power converter modules, each with its own resonator. This segmentation allows the total power to be distributed across multiple lower-power units, reducing the magnetic emission and EMI of each individual module while maintaining high total power delivery capability.
Solution Approach 2:
Multiple power converter modules are combined to operate simultaneously, achieving high total power output while each module operates at lower power levels with reduced magnetic emission. The modules work together to deliver cumulative power without the EMI hazards associated with single high-power systems.
2Loss of energy
If multiple power converters and resonators are used to achieve high efficiency wireless power transfer, then power transfer efficiency is improved, but system complexity and cost increase
Solution Approach 1:
The system uses multiple modular power converter-resonator units that can be independently designed and optimized. Each module contributes to overall efficiency while the modular architecture simplifies design, manufacturing, and maintenance compared to a single complex high-power system.
Solution Approach 2:
The power converter modules are designed with universal interfaces and standardized configurations, allowing them to be interconnected in various combinations. This universality reduces system complexity by using repeated standardized units rather than custom-designed complex components.
3Adaptability or versatility
If a modular design with switchable capacitors is implemented, then adaptability to different power levels and receiver configurations is improved, but device complexity increases
Solution Approach 1:
The system incorporates switchable capacitors that can dynamically adjust the resonant frequency and impedance matching of each power converter module. This dynamic adaptability allows the system to optimize performance for different power levels and receiver configurations without requiring complex manual reconfiguration.
Solution Approach 2:
The modular architecture with independent power converter modules, each equipped with its own switchable capacitor, distributes the adaptability function across multiple simple units rather than requiring a single complex control system, thereby reducing overall device complexity while maintaining versatility.
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 enables high efficiency wireless power transfer with reduced magnetic emission and lower costs, improved system reliability, and flexibility in adapting to different power levels and receiver configurations, while minimizing EMI and noise, thus enhancing the safety and performance of WPT systems.
Implementation Method 1
The resonator block comprises a plurality of resonators. Each resonator has a resonant capacitor and is coupled to one of the plurality of power converters
Implementation Method 2
Wireless power transfer (WPT) is desirable for many applications due to better customer experience and better tolerance of harsh environment
Implementation Method 3
an improved WPT system based on advanced resonant power conversion
Data Source
AI summary
A device comprises a plurality of power converters, a resonator block and a connection block. The plurality of power converters is coupled to a power port having a voltage. Each power converter comprises a plurality of switch networks, and each switch network has a plurality of power switches. The resonator block comprises a plurality of resonators. Each resonator has a resonant capacitor and is coupled to one of the plurality of power converters. The connection block comprises a switching component and is coupled to one of the plurality of resonators, and the connection block and the said resonator are configured such that the device operates in a wireless charging mode with the resonator block activated or a wired charging mode with the connection block activated.