Wireless Charging Inverter Frequency and Voltage Control
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Solution Overview
Problem
Existing wireless charging systems face incompatibility issues when using a single inverter to drive multiple inductors for multiple charging, as well as inefficiencies in power transfer due to mismatched coil characteristics and frequency settings.
Innovation Solution
A wireless charging system that controls the voltage of the resonance tank by adjusting the driving voltage of an enabling switch based on targeted current values and determines the frequency of the driving signal according to the voltage gains of the receiving module, using a single inverter to drive multiple inductors and ensuring compatibility with multiple receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single inverter is used to drive multiple inductors for multiple charging, then device complexity is reduced and ease of operation is improved, but incompatibility problems arise between transmitters using single inverter and receivers using multiple inverters
Solution Approach 1:
The patent changes the operating parameters (voltage and frequency) of the resonance tank dynamically to match different receiver requirements. By adjusting the driving voltage magnitude and frequency based on targeted current values and voltage gains, the system can accommodate receivers designed for different inverter configurations without requiring hardware changes to the receiver side.
Solution Approach 2:
The single inverter is designed to perform multiple functions by driving multiple inductors simultaneously with different voltage and frequency settings. This allows one inverter to replace what would traditionally require multiple inverters, making the transmitter universal enough to work with various receiver types while maintaining simplified architecture.
2Loss of energy
If voltage and frequency settings are optimized for power transmission, then power transmission efficiency is improved, but control complexity increases
Solution Approach 1:
The control system uses feedback from the receiving module's voltage gain and current requirements to dynamically adjust the inverter's output voltage and frequency. This closed-loop control ensures optimal power transmission efficiency by matching the transmitter output to the actual needs of the receiver, while the feedback mechanism automates the complexity rather than requiring manual intervention.
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 approach enhances power transmission efficiency by optimizing voltage and frequency settings, reducing power loss and simplifying the circuit configuration for multiple wireless charging, while maintaining compatibility with existing receivers.
Implementation Method 1
an inverter converting a direct current voltage into an alternating current voltage by a switching operation
Implementation Method 2
A principle of the inductive coupling method is the same as a basic principle of a transformer. In the wireless charging system, a primary coil and a secondary coil of the transformer are separated from each other
Implementation Method 3
a voltage of a resonance tank is controlled by controlling a magnitude of a driving voltage of an enabling switch based on a targeted current value
Data Source
AI summary
There is provided a wireless charging system, including: a wireless power transmitting module including at least one power transmitter transmitting power and at least one wireless power receiving module receiving the power, wherein the wireless power transmitting module controls the power, which is transmitted to the wireless power receiving modules corresponding to the power transmitters, from the power transmitters, depending on targeted voltage gains of the wireless power receiving modules corresponding to the power transmitters.