Wireless Power Resonator Current Control
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Solution Overview
Problem
Existing wireless power transmission systems face inefficiencies in controlling current flow and energy transfer due to limitations in resonator isolation systems, particularly in near-field wireless power transmission, where distance and resonance characteristics affect energy delivery and reception.
Innovation Solution
A wireless power transmission apparatus with a resonator, switch, setting unit, and control unit that dynamically sets and controls the target current based on actual current flow, resonance waveform, and data to be transmitted, allowing precise control and optimization of energy transfer through mutual resonance between source and target resonators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If resonator isolation system is used for near-field wireless power transmission, then power transmission capability is improved, but energy transfer efficiency deteriorates due to distance and resonance characteristic variations
Solution Approach 1:
The patent implements a feedback control mechanism where the controller continuously monitors the actual current flowing through the resonator and compares it with the target current. Based on this comparison, the controller dynamically adjusts the switching control signal to maintain optimal resonance conditions. This closed-loop feedback system compensates for variations in distance and resonance characteristics, thereby maintaining high energy transfer efficiency while enabling power transmission capability.
Solution Approach 2:
The patent employs dynamic current control by adjusting the target current value based on detected resonance waveforms and transmission conditions. The system transitions from static to dynamic operation, where the control parameters adapt in real-time to changing resonance conditions, distance variations, and load requirements. This dynamic adjustment optimizes the balance between power transmission capability and energy transfer efficiency.
2Manufacturing precision
If current flow control is enhanced for precise energy transfer, then energy transfer precision is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent implements a self-service control mechanism where the system uses its own resonance waveform detection capability to automatically determine the target current value. The detector measures the resonance waveform, and the controller autonomously processes this information to set appropriate control parameters without requiring external intervention or complex external control systems. This self-service approach achieves precise energy transfer while minimizing additional device complexity.
Solution Approach 2:
The controller performs multiple functions using a single integrated unit: it detects resonance waveforms, determines target current values, generates switching control signals, and adjusts operational parameters. By consolidating these functions into one multi-functional controller, the patent achieves precise energy transfer control without proportionally increasing device complexity, as the same hardware component executes multiple control tasks.
3Productivity
If dynamic current adjustment is implemented based on resonance waveform, then power transfer efficiency is improved, but control complexity increases
Solution Approach 1:
The patent employs periodic switching control where the controller generates periodic switching signals to drive the resonator. The switching frequency and duty cycle are dynamically adjusted based on detected resonance waveforms, creating a rhythmic control pattern that synchronizes with the resonator's natural oscillation. This periodic action simplifies the control complexity by using regular, predictable switching patterns rather than continuous complex modulation, while still achieving high power transfer efficiency through resonant coupling.
4Loss of energy
If switch control is optimized for energy delivery, then energy delivery efficiency is improved, but system reliability may deteriorate due to increased switching operations
Solution Approach 1:
The patent implements preliminary action by pre-determining the target current value based on detected resonance waveforms before actual power transmission begins. The controller analyzes the resonance characteristics in advance, sets appropriate control parameters, and prepares the switching sequence. This preliminary configuration reduces the need for frequent real-time adjustments during operation, thereby improving energy delivery efficiency while minimizing the number of switching operations that could compromise system 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
Enhances energy charging efficiency by dynamically adjusting current flow and resonance parameters, improving power transfer efficiency and reducing energy loss, enabling reliable and efficient wireless power transmission across varying distances and conditions.
Implementation Method 1
a resonator configured to transmit power through a resonance with another resonator
Implementation Method 2
a switch configured to connect the resonator to a power source
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A wireless power transmission apparatus includes a resonator configured to transmit power through a resonance with another resonator, a switch configured to connect the resonator to a power source, a setting unit configured to set a target amount of current to flow in the resonator, and a control unit configured to control the switch based on the target amount of current.