Wireless Power Demodulation Apparatus for High-Power Signal Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless power transfer systems face challenges in precisely detecting control signals, which affects the reliable operation of transmitters as power levels increase, necessitating improved demodulation techniques to enhance system performance.
Innovation Solution
A demodulation apparatus comprising current sense apparatuses and processing units that generate peak and average current signals, and peak voltage signals, which are then fed into a demodulation apparatus to convert these signals into digital form, enabling precise demodulation of control signals in wireless power transfer systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power level of wireless power transfer system is increased, then power transmission capability is improved, but control signal detection precision deteriorates
Solution Approach 1:
The current signal is segmented into multiple components: average current signal, peak current signal, and peak voltage signal. Each component is processed separately through dedicated processing circuits to extract control signal information, thereby maintaining detection precision at high power levels
Solution Approach 2:
An intermediary processing apparatus is introduced between the current sense apparatus and the demodulation apparatus. This intermediary generates multiple processed current signals (average, peak) and voltage signals that serve as mediators to enhance the detectability of control signals embedded in high-power transmission signals
2Device complexity
If conventional current sensing method is used, then device complexity is low, but control signal detection reliability deteriorates
Solution Approach 1:
The sensing system is divided into multiple functional segments: current sense apparatus for raw signal acquisition, current sense processing apparatus for generating average and peak current signals, and voltage sense processing apparatus for generating peak voltage signals. This segmentation improves detection reliability while keeping each individual circuit relatively simple
Solution Approach 2:
The current sense processing apparatus performs multiple functions: it generates average current signal, peak current signal, and works in conjunction with voltage processing to generate peak voltage signal. This multi-functionality approach improves reliability without proportionally increasing 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 allows for precise demodulation of control signals, thereby improving the performance and reliability of wireless power transfer systems, especially at higher power levels.
Implementation Method 1
a first current sense apparatus coupled to a first switching element of a power conversion apparatus
Implementation Method 2
The primary side transmitter is magnetically coupled to the secondary side receiver through a magnetic coupling. The magnetic coupling may be implemented as a loosely coupled transformer having a primary side coil formed in the primary side transmitter
Implementation Method 3
The secondary side receiver is able to receive the wireless power signals through the loosely coupled transformer and convert the received wireless power signals to electrical power suitable for a load
Data Source
AI summary
A device comprises a first current sense apparatus coupled to a first switching element of a power conversion apparatus, a second current sense apparatus coupled to a second switching element of the power conversion apparatus and a current sense processing apparatus configured to receive detected current signals from the first current sense apparatus and the second current sense apparatus, and generate an average current signal and a peak current signal.