Hybrid Wireless Power Transfer Switching for Distance and Efficiency
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Solution Overview
Problem
Existing wireless power transmission methods, such as magnetic induction and magnetic resonance, face limitations in efficiency and distance constraints, necessitating a hybrid approach that combines both for improved performance.
Innovation Solution
A hybrid wireless power transmitting system that alternately transmits object detection signals via inductive and magnetic resonant units, selecting the appropriate power transmission method based on response signals to ensure efficient charging of both inductive and magnetic resonance receiving apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If magnetic induction method is used for wireless power transmission, then power transmission efficiency is improved, but transmission distance is limited to a few millimeters
Solution Approach 1:
The patent combines magnetic induction and magnetic resonance methods into a hybrid wireless power transmission system. The system includes both an induction coil and a resonance coil, allowing it to switch between or combine both methods depending on the transmission distance and power requirements, thereby resolving the contradiction between efficiency and distance
2Length of stationary object
If magnetic resonance method is used for wireless power transmission, then transmission distance is extended to a few meters, but power transmission efficiency changes rapidly with distance
Solution Approach 1:
The patent implements dynamic switching between magnetic induction and magnetic resonance methods based on real-time detection of transmission distance and power requirements. The system adjusts the active transmission method dynamically, using induction for short distances where efficiency is critical and resonance for longer distances where distance is the priority
3Device complexity
If a single wireless power transmission method is used, then device structure is simplified, but compatibility with different receiving apparatus types is reduced
Solution Approach 1:
The patent designs a hybrid wireless power transmission system that can serve multiple types of receiving apparatus (both induction-based and resonance-based devices) through a single transmitting device. The system detects the type of receiving apparatus and switches to the appropriate transmission method, achieving universal compatibility without requiring separate dedicated transmitters for each device type
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 system enhances charging efficiency and compatibility by optimizing impedance matching, reducing component count, and preventing abrupt voltage rises, while maximizing transmission efficiency and durability.
Implementation Method 1
a transmitting coil configured to transmit an inductive power signal
Implementation Method 2
a transmitting antenna configured to transmit a resonant power signal
Data Source
AI summary
The present disclosure provides a signal processing method performed by a hybrid wireless power transmitting apparatus which is configured to transmit wireless power signals based on magnetic resonance and magnetic induction, the method comprising transmitting a first object detection signal via an inductive power transmitting unit and a second object detection signal via a magnetic resonant power transmitting unit alternatively; operating one of the inductive power transmitting unit and the magnetic resonant power transmitting unit which is selected based on an inductive response signal and a resonant response signal corresponding to the first object detection signal and the second object detection signal respectively; and transmitting wireless power signal via the selected power transmitting unit; and a hybrid wireless power transmitting apparatus using the method.