Wireless Power Transmission Voltage Control
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in quickly responding to sudden changes in load voltage, leading to delays in achieving a desired operation state when the operation state of a load, such as a motor, is suddenly changed.
Innovation Solution
A wireless power transmission system that includes a power transmission apparatus, a power reception apparatus, and a power control apparatus, where the power control apparatus updates a load instruction value and a control parameter in real-time to adjust the voltage of the alternating current power transmitted, allowing the power transmission apparatus to rapidly adapt and maintain a stable voltage output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional feedback control methods are used to adjust power transmission, then system stability is maintained, but the response time to sudden load changes is slow
Solution Approach 1:
The control parameter for adjusting the voltage of the transmitted power is updated in advance when the operation load changes, before the actual power transmission adjustment occurs. This preliminary update of the control parameter enables the power transmission apparatus to respond more quickly to load changes, reducing the overall time to achieve the desired operation state while maintaining system stability through coordinated control.
2Loss of time
If the voltage of transmitted power is adjusted rapidly in response to load changes, then the time to achieve desired operation state is reduced, but control complexity increases
Solution Approach 1:
The system employs feedback control where the control parameter for voltage adjustment is updated based on the detected operation load, and this updated parameter is transmitted to the power transmission apparatus. The power transmission apparatus then adjusts the transmitted power voltage according to the received control parameter, creating a closed-loop control system that achieves rapid stabilization while maintaining manageable complexity through structured feedback mechanisms.
Solution Approach 2:
The system changes the control parameter (voltage adjustment parameter) in response to operation load changes. By updating this parameter and transmitting it to the power transmission apparatus, the system enables rapid voltage adjustment of the transmitted power, thereby reducing the time required to stabilize the system after load changes without requiring complex hardware modifications.
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 enables the wireless power transmission system to quickly achieve a desired operation state by rapidly adjusting the voltage output in response to changes in the load, reducing the time taken to stabilize the system compared to traditional feedback control methods.
Implementation Method 1
a power transmission inverter circuit that converts first direct current power supplied from the direct current power supply into first alternating current power
Implementation Method 2
a power transmission antenna that wirelessly transmits the first alternating current power obtained as a result of the conversion
Implementation Method 3
a power reception antenna that is electromagnetically coupled with the power transmission antenna and receives the transmitted first alternating current power
Implementation Method 4
a rectifier that converts the received first alternating current power into second direct current power
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A wireless power transmission system includes a power transmission apparatus (100), a power reception apparatus (300), a load driving apparatus (400), and a power control apparatus (500). The power control apparatus (500) includes a direct current power supply (510), a main control circuit (550), and a communicator (580). Each time an operation load to be achieved by the load driving apparatus changes, the main control circuit (550) updates a load instruction value for the load driving apparatus (400) and a control parameter for adjusting a voltage of first alternating current power, the control parameter being used by the power transmission apparatus (100) to convert first direct current power into the first alternating current power. The power transmission apparatus includes an inverter circuit (130) and a power transmission control circuit (150) that determines the voltage of the first alternating current power on the basis of the control parameter updated by the power control apparatus (500) and that controls the inverter circuit (130).