Wireless Power Receiver Resonant Frequency Adjustment
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Solution Overview
Problem
Existing wireless charging systems face inefficiencies due to fixed resonant frequencies, which are not adaptable to changes in the environment or the number of devices being charged, leading to reduced power transfer efficiency.
Innovation Solution
A wireless power system that includes a power receiver with a resonant circuit comprising an inductor and capacitor, where a power reception control unit dynamically changes the connection between these components to adjust the resonant frequency in response to environmental conditions and voltage changes, allowing for optimal power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the resonant frequency is fixed in the wireless power system, then the system structure is simple and stable, but the power transfer efficiency decreases when environmental conditions or number of devices change
Solution Approach 1:
The patent implements dynamic resonant frequency adjustment by enabling the resonant circuit to switch between different connection configurations (series/parallel combinations of capacitors and inductors) based on environmental conditions and device requirements. This dynamic reconfiguration allows the system to maintain optimal power transfer efficiency across varying operating conditions without requiring complete system redesign.
Solution Approach 2:
The patent changes the resonant frequency parameter by altering the connection topology of the resonant circuit components. By switching between series and parallel connections of capacitors and inductors, the resonant frequency can be adjusted to match different operating conditions, thereby maintaining high power transfer efficiency while adapting to environmental changes or varying device counts.
2Adaptability or versatility
If the resonant frequency is adjusted dynamically to adapt to environmental changes, then the power transfer efficiency is maintained, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The resonant circuit components (capacitors and inductors) serve multiple functions: they form the resonant circuit for power transfer and simultaneously act as switching elements for frequency adjustment. The same components that enable power transmission also provide the adaptability mechanism, eliminating the need for separate adjustment mechanisms and reducing overall system complexity.
Solution Approach 2:
The system automatically adjusts its resonant frequency based on environmental conditions and device requirements without requiring external intervention. The control unit monitors operating conditions and autonomously reconfigures the resonant circuit connections to maintain optimal performance, making the system self-adaptive and reducing the need for complex external control mechanisms.
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 high transmission efficiency regardless of changes in the wireless power transfer environment by dynamically adjusting the resonant frequency, ensuring effective power transfer to multiple devices.
Implementation Method 1
a power receiving unit having a receiving side resonant circuit provided with at least one inductor and at least one capacitor, and configured to receive a wireless power signal, the wireless power signal being generated based on a resonance phenomenon between the receiving side resonant circuit and a transmitting side resonant circuit
Data Source
AI summary
This specification provides a wireless power system capable of changing a resonant frequency and a resonant frequency changing method thereof. To this end, a wireless power receiver according to one exemplary embodiment includes a power receiving unit having a receiving side resonant circuit provided with at least one inductor and at least one capacitor, and configured to receive a wireless power signal, the wireless power signal being generated based on a resonance phenomenon between the receiving side resonant circuit and a transmitting side resonant circuit of a wireless power transmitter, and a power reception control unit configured to control the power receiving unit to change a connection between the at least one inductor and the at least one capacitor so as to change a resonant frequency corresponding to the wireless power signal.