Wireless Power Transmission Unit with Magnetic Resonance Frequency Tuning
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Solution Overview
Problem
Existing wireless power transmission technologies face limitations in efficiency and cost due to the need for separate transceiver modules and complex construction, particularly in magnetic induction methods, which require close coil alignment and high resonance characteristics.
Innovation Solution
A wireless power transmission/reception apparatus that uses a single wireless power transmission unit and multiple wireless power reception units, employing magnetic resonance to transmit power without separate transceivers, with a directional power coupler and controllers to adjust resonance frequency and power intensity based on detected power consumption devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate transceiver modules are installed for communication between transmitting and receiving ends, then communication capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the communication function with the power transmission function by using the power signal itself to carry communication information. The transmitting end embeds communication data in the power signal parameters (frequency, amplitude, phase), and the receiving end extracts this information, eliminating the need for separate transceiver modules while maintaining both power transmission and communication capabilities
Solution Approach 2:
The power transmission system is designed to perform multiple functions simultaneously: it transmits power and communicates information using the same hardware components. The power signal serves dual purposes as both energy carrier and information carrier, making the system more versatile and reducing overall device complexity
2Loss of energy
If magnetic induction technology is used for wireless power transmission, then power transmission efficiency is improved, but the coils must be located adjacent to each other within short distance
Solution Approach 1:
The patent employs magnetic resonance technology which dynamically adjusts the resonant frequency of both transmitting and receiving coils to match, creating a coupled oscillation state that enables efficient power transfer over longer distances. This dynamic frequency matching allows the system to overcome the distance limitation of traditional magnetic induction while maintaining high efficiency
Solution Approach 2:
The system changes the operating parameters by tuning the resonant frequency of the LC circuits in both transmitting and receiving ends to be identical. This frequency parameter adjustment transforms the power transmission mode from short-distance magnetic induction to long-distance magnetic resonance, achieving both efficiency and extended transmission distance
3Length of moving object
If magnetic resonance technology is used to transmit power over several meters, then transmission distance is improved, but high resonance characteristics (high quality factor) are required
Solution Approach 1:
The patent implements feedback control where the receiving end detects the power signal parameters and sends back acknowledgment signals to the transmitting end. This feedback mechanism allows real-time monitoring and adjustment of the resonance state, ensuring stable operation even with varying load conditions and reducing the stringency of quality factor requirements
Solution Approach 2:
The system uses periodic modulation of the power signal at specific frequencies to maintain and detect resonance conditions. By employing periodic signaling and synchronization, the system can reliably establish and maintain resonant coupling over several meters without requiring extremely high quality factors, as the periodic action reinforces the resonant state
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 enhances power transmission efficiency by optimizing resonance frequency and impedance matching, reducing costs and complexity by eliminating the need for separate communication devices and allowing simultaneous or sequential power supply to multiple devices.
Implementation Method 1
generating a wireless power signal to be wirelessly transmitted, wirelessly transmitting the generated wireless power signal to a wireless power reception unit in a magnetic resonance manner
Implementation Method 2
magnetic induction technology using a magnetic field, and magnetic resonance technology using energy conversion between a magnetic field and an electric field
Implementation Method 3
a directional power coupler having directionality so that the wireless power signal input from the power signal generator through a first port
Implementation Method 4
a power amplifier for amplifying the wireless power signal input from the directional power coupler
Implementation Method 5
an impedance converter for converting an impedance of the amplified wireless power signal to impedance of the resonance antenna
Data Source
AI summary
Disclosed herein is a wireless power transmission/reception apparatus. The wireless power transmission/reception apparatus includes a wireless power transmission unit and a wireless power reception unit. The wireless power transmission unit receives power, generates a wireless power signal to be wirelessly transmitted, wirelessly transmits the generated wireless power signal in a magnetic resonance manner, receives a returned wireless power signal and detects the number of power consumption devices, and wirelessly transmits a wireless power signal using resonance frequency appropriate for the number of power consumption devices.