Adaptive Rectifier Switching for Multi-Voltage Wireless Power
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Solution Overview
Problem
Current wireless power transmission systems are over-dimensioned for higher DC load voltage levels, leading to waste of hardware resources and increased manufacturing costs when designed to accommodate a range of voltage levels, as they are optimized for a single predetermined voltage level.
Innovation Solution
An adaptive mobile side rectifying circuit that can switch between full bridge and half bridge rectifying modes based on the required load voltage level, allowing the system to efficiently supply DC load voltages at multiple voltage levels without the need for over-dimensioning circuit components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If circuit components are dimensioned according to the largest envisaged DC load voltage level, then the system can supply power at the highest voltage level reliably, but this leads to over-dimensioning of components for lower voltage levels and increased manufacturing costs
Solution Approach 1:
The patent applies dynamics by enabling the rectifying circuit to switch between full-bridge and half-bridge modes dynamically based on the required output voltage level. The circuit transitions from full-bridge mode (for lower voltage levels) to half-bridge mode (for higher voltage levels), allowing components to operate at appropriate dimensions for each mode rather than being permanently over-dimensioned for the maximum voltage level
Solution Approach 2:
The patent changes the operational parameters of the rectifying circuit by switching between two distinct rectifying modes (full-bridge and half-bridge). This parameter change allows the same physical circuit to adapt its electrical characteristics to match the required output voltage level, thereby avoiding component over-dimensioning and reducing manufacturing costs
2Device complexity
If a single rectifying circuit design is used for multiple voltage levels, then device complexity is reduced, but component over-dimensioning occurs leading to hardware resource waste
Solution Approach 1:
The patent implements universality by designing a single rectifying circuit that can perform multiple functions - operating in full-bridge mode for lower voltage levels and half-bridge mode for higher voltage levels. This multi-functionality eliminates the need for separate rectifying circuits for different voltage levels, reducing device complexity while avoiding hardware resource waste through adaptive mode switching
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 reduces manufacturing costs by allowing the same wireless power transmission system design to support a wide range of load voltages, maintaining performance while minimizing component over-dimensioning and system costs.
Implementation Method 1
the stationary side AC signal is output to the series connection of the stationary side compensation capacitor 104 and the transmitter coil 106 for generation of an oscillating magnetic field
Implementation Method 2
the receiver coil 108, when placed in the magnetic field produced by the transmitter coil 106, receives energy transmitted by the transmitter coil 106 through inductive coupling
Data Source
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AI summary
The present invention provides a wireless power transmission system having capability to supply mobile side DC load voltages at a plurality of voltage levels at minimized system manufacturing costs. An adaptive mobile side rectifier circuit operates in a full bridge rectifying mode or a half bridge rectifying mode depending on the voltage level of a mobile side load voltage to be supplied. A rectifying mode controller switches to the full bridge rectifying mode during supply of the mobile side load voltage at a lower load voltage level and switches to the half bridge rectifying mode during supply of the mobile load voltage at a higher load voltage level. The present invention also relates to a method of controlling the adaptive mobile side rectifier circuit.