Multimode Wireless Power Receiver Resonant Tank Frequency Reconfiguration
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies and incompatibility issues due to differing resonant frequencies between transmitters and receivers, leading to reduced system efficiency and transient response when attempting to establish power transfer between dissimilar devices.
Innovation Solution
A multimode wireless power receiver is designed with a resonant tank that can reconfigure its resonant frequency in response to detected transmitter types, allowing it to adjust and match the operating frequency of different wireless power transmitter standards, thereby enhancing compatibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a wireless power receiver is designed to operate at a fixed resonant frequency, then the device structure is simple and manufacturing is easier, but compatibility with different transmitter types deteriorates and system efficiency decreases
Solution Approach 1:
The resonant tank is designed with dynamically adjustable parameters, allowing the resonant frequency to be changed based on the detected transmitter type. The control logic dynamically reconfigures the resonant tank components (inductors and capacitors) to match different transmitter frequencies, transforming a static system into an adaptive one that maintains compatibility across multiple standards
Solution Approach 2:
The invention changes the operating parameters of the resonant tank by adjusting inductance and capacitance values based on the detected transmitter type. The control logic selects different combinations of inductors and capacitors to tune the resonant frequency to match the transmitter, enabling the receiver to adapt its electrical characteristics to different power transmission standards
2Device complexity
If the resonant frequency of the receiver is fixed, then the device complexity is reduced, but power conversion efficiency deteriorates when transferring power from dissimilar devices
Solution Approach 1:
The resonant tank employs dynamic reconfiguration of its LC components based on real-time detection of transmitter characteristics. This dynamic adaptation ensures that the receiver always operates at optimal resonance with the transmitter, maximizing power transfer efficiency and minimizing energy losses regardless of which transmitter standard is being used
Solution Approach 2:
The control logic implements a feedback mechanism by detecting the transmitter type and using this information to adjust the resonant tank configuration. This closed-loop approach ensures that the receiver continuously adapts to maintain optimal coupling with the transmitter, thereby maximizing power conversion efficiency and reducing energy loss
3Adaptability or versatility
If a wireless power receiver supports multiple transmitter types, then compatibility improves, but the device complexity and reconfiguration requirements increase
Solution Approach 1:
The resonant tank is segmented into multiple discrete inductor and capacitor components that can be selectively connected through switches. This modular segmentation allows the control logic to create different resonant configurations by connecting specific components, enabling multi-standard support while maintaining a relatively simple overall structure through standardized switching mechanisms
Solution Approach 2:
The resonant tank is designed as a universal structure capable of supporting multiple transmitter standards through reconfiguration. By using a set of common inductors and capacitors that can be arranged in different combinations, the system achieves multi-functionality without requiring separate dedicated circuits for each standard, thereby limiting the increase in device complexity
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 efficient power transfer by aligning the resonant frequencies of the receiver with the transmitter, minimizing transmission losses and improving coupling efficiency across various wireless power standards, thus facilitating seamless power transfer between diverse devices.
Implementation Method 1
a resonant tank configured to generate an AC power signal responsive to an electromagnetic field
Implementation Method 2
The resonant tank is configured to exhibit a different resonant frequency for each of the first mode and the second mode
Data Source
AI summary
A wireless power receiver comprises a resonant tank configured to generate an AC power signal responsive to an electromagnetic field, a rectifier configured to receive the AC power signal and generate a DC output power signal, and control logic configured to control the resonant tank to reconfigure and adjust its resonant frequency responsive to a determined transmitter type of a wireless power transmitter. The control logic may operate the wireless power receiver as a multimode receiver having a first mode for a first transmitter type and a second mode for a second transmitter type. The resonant tank may exhibit a different resonant frequency for each of the first mode and the second mode. A method comprises determining a transmitter type for a wireless power transmitter desired to establish a mutual inductance relationship, and adjusting a resonant frequency of a resonant tank of a wireless power receiver.