Adjusting Filter for Wireless Energy Transfer Efficiency
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Solution Overview
Problem
Wireless energy transfer systems face inefficiencies due to varying resistive heat and signal losses in coupled coil systems, which affect the consistency of energy transfer to electronic devices.
Innovation Solution
An adjusting filter is introduced in the receiver device to maintain a substantially constant effective resistance or impedance, using techniques such as linear, non-linear, or programmable filters with capacitors and diodes to adjust the signal received by the load device, thereby optimizing energy transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless energy transfer is performed using coupled coil systems, then energy can be transferred wirelessly to electronic devices, but resistive heat and signal losses vary depending on operating conditions, reducing energy transfer efficiency
Solution Approach 1:
The patent applies dynamics by making the filter components adjustable during operation. The capacitor values can be changed dynamically based on operating conditions such as coupling coefficient and load impedance variations. This allows the system to adapt to changing conditions and maintain optimal energy transfer efficiency while minimizing resistive heat and signal losses.
Solution Approach 2:
The patent implements parameter changes by adjusting the capacitance values of the filter components based on operating conditions. By changing the electrical parameters (capacitor values) in response to variations in coupling coefficient and load impedance, the system optimizes the filter's impedance matching characteristics, thereby improving energy transfer efficiency and reducing losses.
2Adaptability or versatility
If the effective resistance or impedance of the load varies with operating conditions, then the system adapts to different loads, but the signal level received by the load device becomes inconsistent
Solution Approach 1:
The patent implements feedback by monitoring the operating conditions (such as coupling coefficient and load impedance) and using this information to adjust the filter's capacitor values. This closed-loop control ensures that the signal level at the load device remains consistent despite variations in load conditions, while still maintaining adaptability to different loads.
Solution Approach 2:
The patent applies dynamics by making the filter components adjustable during operation. The capacitor values can be changed dynamically based on operating conditions such as coupling coefficient and load impedance variations. This allows the system to adapt to changing conditions and maintain optimal energy transfer efficiency while minimizing resistive heat and signal losses.
3Device complexity
If fixed filter components are used in the receiver device, then the device complexity is reduced, but the system cannot compensate for varying operating conditions
Solution Approach 1:
The patent applies dynamics by making the filter components adjustable during operation. The capacitor values can be changed dynamically based on operating conditions such as coupling coefficient and load impedance variations. This allows the system to adapt to changing conditions and maintain optimal energy transfer efficiency while minimizing resistive heat and signal losses.
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 adjusting filter ensures a constant signal level to the load device, reducing resistive heat and signal losses, and allows for frequency adjustments to maintain efficiency regardless of changing operating parameters, thereby enhancing the overall energy transfer efficiency.
Implementation Method 1
an effective resistance or impedance of a load of a receiver device can be transformed using one or more techniques described herein so that the effective resistance or impedance of the load, as presented to the transformer, is substantially constant
Implementation Method 2
When a signal is applied to the transmitter coil, an electromagnetic field is created and transfers energy to the receiver coil
Implementation Method 3
The receiver coil converts the energy into a signal that is used to charge the battery
Implementation Method 4
the adjusting filter can increase the signal to reduce the effective resistance or impedance of the load that is presented to the transformer. In other embodiments, the adjusting filter can decrease the signal to transform the effective resistance or impedance of the load up
Data Source
AI summary
A receiver device in a coupled coil system for wireless energy transfer includes a receiver coil and a load device operatively connected to the receiver coil and configured to receive a signal from the receiver coil. As one example, the load device is a rechargeable battery. An adjusting filter is included in the receiver device and is operatively connected between the receiver coil and the load device. The adjusting filter can be used to transform the effective resistance or impedance of the load as presented to the transformer during energy transfer so that the effective resistant or impedance of the load is maintained at a substantially constant level, and the signal received by the load device is maintained at a substantially constant level.