Wireless Power Receiver Shielding Saturation Control
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Solution Overview
Problem
Wireless power transfer systems face inefficiencies due to magnetic field shielding saturation, which reduces the effectiveness of energy transfer and increases power loss, especially when shielding materials become saturated, leading to undesired interference and power loss in internal components.
Innovation Solution
Incorporating circuitry to detect changes in shielding capability and perform corrective actions, such as adjusting transmission power levels, to maintain optimal non-saturated conditions and prevent saturation, using communication circuitry to exchange information about power levels and adjust parameters like voltage, current, and frequency to ensure efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If magnetic shielding materials are used to protect internal components from electromagnetic interference, then protection capability is improved, but the shielding materials become saturated under strong magnetic fields, leading to reduced shielding effectiveness and power loss
Solution Approach 1:
The system continuously monitors the magnetic field strength through communication between transmitter and receiver devices. When saturation is detected, the system provides feedback to adjust transmission power levels, ensuring the shielding materials operate within their effective range and maintain reliable protection
Solution Approach 2:
The transmission power level is dynamically adjusted based on real-time monitoring of shielding conditions. The system transitions between different power states to maintain optimal operation of shielding materials, preventing saturation while ensuring effective protection
2Productivity
If transmission power is increased to improve energy transfer efficiency, then power transfer efficiency is improved, but magnetic shielding materials become saturated, causing interference and power loss in internal components
Solution Approach 1:
The receiver device monitors received power levels and transmits feedback signals to the transmitter. Based on this feedback, the transmitter dynamically adjusts transmission power to maintain optimal efficiency while preventing shielding saturation that would cause power loss
Solution Approach 2:
The system changes transmission power parameters dynamically based on operating conditions. By adjusting power levels within a range of at least six decibels, the system optimizes energy transfer efficiency while keeping shielding materials within their linear operating range to avoid power loss
3Reliability
If transmission power levels are dynamically adjusted to prevent shielding saturation, then shielding reliability is improved, but system complexity increases due to additional control circuitry and communication protocols
Solution Approach 1:
The control circuitry performs multiple functions: it monitors power transfer efficiency, detects shielding saturation conditions, communicates with the remote device, and adjusts transmission power. By combining these functions into a unified control system, the patent reduces overall system complexity while maintaining high shielding reliability
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 approach prevents saturation of magnetic shields, maintains efficient energy transfer, and protects internal components by dynamically adjusting power levels based on measured reception levels, thereby enhancing the reliability and efficiency of wireless power transfer.
Implementation Method 1
A primary coil transforms an alternating current into a varying magnetic flux, which is arranged to flow through the secondary coil. The varying magnetic flux then induces an alternating voltage over the secondary coil.
Implementation Method 2
a control circuit configured to measure a plurality of reception levels associated with the quantity of the wireless power signal and to determine whether the plurality of reception levels corresponds to the one or more change requests
Data Source
AI summary
In accordance with an example embodiment of the present invention, an apparatus comprises a wireless power receiver configured to receive a wireless power signal, a communication circuitry configured to transmit one or more change requests associated with a quantity of the wireless power signal, and a control circuit configured to measure a plurality of reception levels associated with the quantity of the wireless power signal and to determine whether the plurality of reception levels corresponds to the one or more change requests.