Bi-directional Wireless Power Transfer Circuit with Voltage Gain Adaptation
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Solution Overview
Problem
Existing wireless power transfer systems suffer from inefficiencies due to power loss and voltage drop, which can impact the operation of devices being charged, especially when power is transferred between a battery and a device in both directions.
Innovation Solution
Incorporating a first and second electronic circuit in the battery and device respectively, configured to operate in transfer and receive modes, which adapt voltage gain to compensate for voltage drops during wireless power transfer, using techniques such as full bridge converters and voltage multipliers to maintain efficient power transfer in both directions without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless power transfer is used to eliminate contact contamination, then reliability is improved, but voltage drop and power loss increase
Solution Approach 1:
The patent changes the electrical parameters (voltage gain, operating frequency) of the wireless power transfer system to optimize performance. By adjusting these parameters, the system compensates for inherent losses and achieves efficient power transfer without physical contacts, resolving the contradiction between contactless operation and energy efficiency
Solution Approach 2:
The patent implements feedback control mechanisms that monitor the wireless power transfer process and dynamically adjust system parameters. This feedback enables real-time compensation for voltage drop and power loss, maintaining high efficiency while preserving the benefits of contactless power transfer
2Reliability
If wireless power transfer is used to eliminate contact contamination, then reliability is improved, but voltage drop increases
Solution Approach 1:
The patent employs parameter changes by adjusting the voltage gain and operating frequency of the wireless power transfer system. These parameter adjustments compensate for voltage drop effects, maintaining stable voltage levels during contactless power transfer and eliminating the need for physical contacts
3Adaptability or versatility
If bi-directional wireless power transfer is implemented, then versatility is improved, but system complexity increases
Solution Approach 1:
The patent applies universality by designing electronic circuits that can operate in multiple modes (power transfer and power receipt) using the same hardware components. This multi-functionality enables bi-directional wireless power transfer without requiring separate dedicated circuits for each direction, thus managing complexity while achieving 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 solution enables bi-directional wireless power transfer with minimal voltage drop, ensuring efficient operation of both the battery and device, acting as a galvanic connection with minimal power loss, and does not require extra components.
Implementation Method 1
The first electronic circuit is configured to operate in a transfer mode to wirelessly transfer power to a device
Implementation Method 2
The first electronic circuit is configured to operate in a receive mode to wirelessly receive power from the device
Data Source
AI summary
A battery includes a first electronic circuit configured to operate in a transfer mode to wirelessly transfer power to a device and to operate in a receive mode to wirelessly receive power from the device. The first electronic circuit also configured to adapt a voltage gain of the first electronic circuit to compensate for a voltage drop between the battery and the device during any one or more of the wireless transfer of power to the device when the battery is operating in the transfer mode and the wireless receipt of power from the device when the battery is operating in the receive mode.