Wireless Power Control Apparatus for Magnetic Resonance Detection
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Solution Overview
Problem
In power transmission systems using magnetic resonance, the power transmission apparatus struggles to detect and communicate with power reception apparatuses lacking a power storage unit, leading to inefficient power transmission and potential waste due to power shortages, especially when the reception apparatus cannot transmit information without initial power transmission.
Innovation Solution
A control apparatus that manages power transmission states, including a test power transmission state to detect target power reception apparatuses without relying on their power state, and adjusts transmission power based on the number and type of reception apparatuses, ensuring appropriate power distribution and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If the power transmission apparatus transmits a search signal to detect power reception apparatuses, then the detection capability is improved, but the power reception apparatus cannot transmit information when it lacks a power storage unit or when stored power is insufficient
Solution Approach 1:
The power transmission apparatus transmits power before information transmission occurs. By preliminarily transmitting power to the power reception apparatus, the system ensures that the reception apparatus has sufficient energy to communicate its presence and status, resolving the contradiction between detection capability and communication reliability.
Solution Approach 2:
Power transmission serves as an intermediary mechanism that enables subsequent communication. The transmitted power acts as a mediator that allows the power reception apparatus to become operational enough to transmit information, thus facilitating the detection process.
2Difficulty of detecting and measuring
If the power transmission apparatus continuously transmits power to detect all possible reception apparatuses, then detection coverage is improved, but energy waste increases when no reception apparatus is present
Solution Approach 1:
The power transmission apparatus transmits power periodically in intervals rather than continuously. This periodic transmission allows the system to maintain detection coverage while reducing energy consumption during periods when no power reception apparatus is present or active.
Solution Approach 2:
The system uses the response from power reception apparatuses to determine whether to continue power transmission. When a reception apparatus is detected, it provides feedback that confirms the need for continued transmission, allowing the system to self-adjust and avoid unnecessary energy waste.
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
Enables effective detection and communication with power reception apparatuses, even those without storage units, by introducing a test power transmission state and optimizing power transmission intervals, thereby preventing power waste and ensuring reliable detection.
Implementation Method 1
a magnetic resonance manner has been devised. Specifically, by adjusting a drive frequency of each resonator so that a resonator of the power transmission apparatus and a resonator of the power reception apparatus resonate with each other at a specific frequency, power is wirelessly transmitted
Data Source
AI summary
A control apparatus is used in a power transmission system for transmitting power with a magnetic resonance manner to a power reception apparatus from a power transmission apparatus. The control apparatus comprises a power control unit configured to control a power transmission state in which transmission power of the power transmission apparatus is controlled in a state in which a power transmission target power reception apparatus is detected, and a test power transmission state in which transmission power of the power transmission apparatus is controlled in a state in which the power transmission target power reception apparatus is not detected.