Wireless Power Transmitter Resonance Detection
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Solution Overview
Problem
Current wireless power transmission systems lack the ability to recognize the operating state of the receiver, leading to continuous power transmission, potential transmitter errors or breakage, and power wastage due to unneeded power delivery.
Innovation Solution
A wireless power transmitter that includes a power source, a transmission coil, a transmission resonance coil, and a detector to determine the existence and power requirements of the receiver, allowing for selective and efficient power transmission by adjusting the power output based on the receiver's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitter continuously transmits power to the receiver regardless of operating state, then the receiver can normally operate always, but high voltage is applied to the transmitter coil causing erroneous operation or breakage
Solution Approach 1:
The transmitter detects the operating state of the receiver through feedback signals and adjusts its power transmission accordingly. The detector monitors whether the receiver is in a ready state, and the transmitter controller modulates power transmission based on this feedback, preventing high voltage application when the receiver is not ready to receive power.
Solution Approach 2:
The power transmission system transitions from a static continuous transmission mode to a dynamic controlled transmission mode. The transmitter actively adjusts its transmission state based on real-time receiver status, switching between power transmission and idle states to match receiver requirements.
2Reliability
If the transmitter transmits predetermined quantity of power regardless of receiver needs, then the receiver can always have sufficient power, but remaining power is wasted
Solution Approach 1:
The receiver transmits feedback signals indicating its power needs and operating state to the transmitter. The transmitter controller interprets these feedback signals to determine the exact quantity of power required, adjusting transmission levels to match receiver demands precisely and eliminating power wastage.
Solution Approach 2:
The transmitter dynamically changes power transmission parameters (voltage, current, power level) based on receiver feedback. Instead of maintaining a fixed predetermined power level, the system adjusts transmission parameters in real-time to optimize power delivery efficiency and prevent 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
Minimizes power wastage by determining the receiver's existence and adjusting power intensity, preventing transmitter errors and breakage by ensuring only necessary power is transmitted.
Implementation Method 1
a transmission coil receiving power from the power source to generate a magnetic field
Implementation Method 2
a transmission resonance coil coupled with the transmission coil to transmit power to the wireless power receiver using resonance
Data Source
Figure 1~5(b)
Figure 6~8
AI summary
Disclosed are a wireless power transmitter and a wireless power transmission method thereof. The wireless power transmitter, which wirelessly transmits power to a wireless power receiver, includes a power source to generate AC power, a transmission coil receiving power from the power source to generate a magnetic field, a transmission resonance coil coupled with the transmission coil to transmit power generated by the magnetic field to the wireless power receiver using resonance, and a detector detecting an existence state of the wireless power receiver by detecting power transmitted through the transmission resonance coil.