Wireless Power Transfer Terminal Circuit Topology
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Solution Overview
Problem
Traditional wireless power transfer terminals require multiple semiconductor switching elements for both power transmission and reception, leading to complex circuit configurations and increased manufacturing costs.
Innovation Solution
A wireless power transfer terminal with a parallel circuit and control unit that switches between full-bridge inverter and full-wave rectifier modes using fewer semiconductor switching elements, allowing for efficient power transmission and reception while reducing circuit complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power transmission and reception circuits are used, then power transmission and reception functions are reliable, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines separate power transmission and reception circuits into a single integrated circuit that can operate in both modes. The circuit uses a unified structure with switching elements that can be controlled to achieve either power transmission or power reception functionality, thereby reducing device complexity while maintaining both functions.
Solution Approach 2:
The patent designs a universal circuit that performs multiple functions - it can operate as a power transmission circuit, a power reception circuit, or both simultaneously depending on the control signals. This multi-functional approach eliminates the need for separate dedicated circuits for each function, reducing overall device complexity.
2Adaptability or versatility
If multiple semiconductor switching elements are used for both power transmission and reception, then power control flexibility is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the switching elements required for power transmission and reception into a shared set of components. The same semiconductor switching elements are used for both functions, with their operation controlled by different control signals. This reduces the total number of components needed, lowering manufacturing cost while maintaining power control flexibility through intelligent switching control.
Solution Approach 2:
The patent employs dynamic control of semiconductor switching elements where the same physical components can be dynamically reconfigured for different functions. By dynamically switching the role of each element based on operational mode (transmission or reception), the system maintains flexibility without requiring duplicate static components for each function.
3Area of stationary object
If a unified circuit is used for both power transmission and reception, then space savings and cost reduction are achieved, but circuit configuration complexity increases
Solution Approach 1:
The patent merges power transmission and reception circuits into a unified structure that shares common components such as semiconductor switching elements, coils, and control logic. This consolidation significantly reduces the physical space required for the circuit while the modular design and systematic control approach keep the configuration manageable rather than overly complex.
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 solution enables space savings and reduced manufacturing costs by utilizing fewer semiconductor switching elements, improving efficiency in both power transmission and reception modes.
Implementation Method 1
The coil 102 used, for both transmission and reception, transmits power to a partner device over an electromagnetic field excited in the coil 102 by application of an alternating-current output from the power transmission circuit 103
Implementation Method 2
receives power from the partner device over an electromagnetic field output from the partner device
Implementation Method 3
The power reception circuit 104 includes a rectifier circuit for converting an alternating-current that has been excited (input) in the coil 102 into an output voltage
Data Source
AI summary
This disclosure provides a wireless power transfer terminal that enables a power device to be used for both power transmission and power reception and allows space savings of circuits and a reduction in the cost of manufacturing. The wireless power transfer terminal includes first through fourth switching elements, a coil, and a control circuit. Each of two sets of switching elements forms a series circuit, and the two sets are connected in parallel to each other. The coil is connected between connection points of the switching elements of the series circuits. The control circuit performs switching control of the first to fourth switching elements in a power transmission mode and in a power reception mode.