Wireless Power Cable Resonance Frequency Stabilization
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Solution Overview
Problem
Existing wireless power transmission systems for semiconductor manufacturing require manual adjustment of capacitance or inductance values in power cables to maintain a constant resonance frequency, which is time-consuming and labor-intensive due to varying cable lengths.
Innovation Solution
A wireless power transmitting apparatus with a capacitance controlling unit that includes variable capacitance and inductance parts, utilizing switches and sensors to automatically adjust capacitance and inductance values based on cable length, ensuring a constant resonance frequency without operator intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power cable length is changed to adapt to different travel rail configurations, then the system becomes more adaptable to different manufacturing equipment, but the resonance frequency changes and requires manual adjustment of capacitance or inductance values
Solution Approach 1:
The patent implements a dynamic capacitance adjustment mechanism where the capacitance value automatically changes based on the detected cable length. The system uses a sensor to detect cable length and a controller to automatically adjust the capacitance value, eliminating the need for manual intervention and maintaining constant resonance frequency across different cable lengths.
Solution Approach 2:
The system employs a feedback mechanism where a sensor continuously monitors the cable length and provides this information to the controller. The controller then adjusts the capacitance value based on this feedback, creating a closed-loop control system that automatically maintains the resonance frequency at a constant value regardless of cable length variations.
2Reliability
If manual adjustment of capacitance or inductance values is performed to maintain constant resonance frequency, then the resonance frequency stability is improved, but the installation and changing process requires more time and labor
Solution Approach 1:
The system performs self-adjustment of capacitance values without requiring operator intervention. The sensor detects the cable length and the controller automatically adjusts the capacitance to maintain constant resonance frequency, enabling the system to service itself and eliminate time-consuming manual adjustment processes.
Solution Approach 2:
The patent replaces the mechanical manual adjustment process with an automated electronic control system. Instead of physically adjusting capacitance or inductance components by hand, the system uses electronic sensors and controllers to automatically adjust the electrical parameters, substituting mechanical operations with automated electronic control.
3Reliability
If additional components like inductors are connected to adjust inductance value for short cables, then the resonance frequency is maintained, but the device complexity increases
Solution Approach 1:
The system maintains constant resonance frequency by dynamically changing the capacitance parameter based on cable length rather than physically adding or removing inductive components. This parameter adjustment approach simplifies the device configuration compared to manually connecting additional inductors for short cables.
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
The system maintains a fixed resonance frequency across varying power cable lengths, reducing the need for manual adjustments and improving efficiency in semiconductor manufacturing processes.
Implementation Method 1
a power cable coupling the vehicle and the AC power supplying unit to each other, the power cable transferring the power from the AC power supplying unit to the vehicle
Implementation Method 2
a capacitance controlling unit provided on the power cable, the capacitance controlling unit having a variable capacitance value according to a length of the power cable to maintain a value of the resonance frequency constant
Data Source
AI summary
A wireless power transmitting apparatus includes an AC power supplying unit being configured to supply a AC power for a vehicle of being configured to move along a travel track, a power cable coupling the vehicle and the AC power supplying unit to each other, the power cable transferring the power from the AC power supplying unit to the vehicle and a capacitance controlling unit provided on the power cable, the capacitance controlling unit having a variable capacitance value according to a length of the power cable to maintain a value of the resonance frequency constant. Therefore, the value of the resonance frequency may be kept constant irrespective of the length of the power cable.


