Wireless Power Calibration Device for Frequency Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Contact-based power transfer systems are cumbersome, environmentally damaging, and prone to safety issues due to high currents and voltages, while contactless systems face voltage gain instability leading to component damage when load conditions change.
Innovation Solution
A calibration device for wireless power transfer systems that includes a controller, load unit, and voltage sensor to determine the optimal operating frequency by transmitting input voltage signals of different frequencies to a power exchange coil and measuring output voltages across multiple loads, minimizing voltage gain variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact-based power transfer systems are used, then power transfer reliability is improved, but device weight and complexity increase due to physical connectors and safety measures
Solution Approach 1:
The patent replaces the mechanical contact-based power transfer system with a contactless electromagnetic induction system. The transmitter coil generates an alternating magnetic field that induces current in the receiver coil, eliminating the need for physical connectors, plugs, and associated safety mechanisms, thereby reducing system weight and complexity while maintaining power transfer reliability
2Adaptability or versatility
If operating frequency is changed to regulate output voltage, then voltage control flexibility is improved, but voltage gain stability deteriorates when load conditions change
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors the output voltage and adjusts the input voltage signal frequency accordingly. When load conditions change causing output voltage deviation, the feedback loop modifies the operating frequency to restore voltage gain stability, thus maintaining both voltage control flexibility and stability
3Reliability
If output voltage regulation is implemented, then system safety is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent employs a self-regulating control mechanism where the controller automatically adjusts the input voltage frequency based on output voltage feedback without requiring complex external intervention. The system monitors its own performance and makes real-time adjustments to maintain safe operating parameters, improving safety while minimizing the complexity of additional control mechanisms
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 maintains output voltage within a desired threshold independent of load variations, reducing stress on components and preventing damage by operating the system at an optimal frequency.
Implementation Method 1
The contactless power transfer unit includes at least a first power exchange coil and a second power exchange coil magnetically coupled to each other
Implementation Method 2
the voltage sensor is configured to measure a plurality of first output voltage signals across the first electrical load and a plurality of second output voltage signals across the second electrical load
Data Source
AI summary
A calibration device includes a controller configured to communicate a plurality of input voltage signals having different determined frequencies to a first power exchange coil. Also, the calibration device includes a load unit coupled to a second power exchange coil, where the load unit includes at least a first electrical load and a second electrical load. Further, the calibration device includes a voltage sensor configured to measure a plurality of first output voltage signals across the first electrical load and a plurality of second output voltage signals across the second electrical load, and where the controller is configured to determine an optimal operating frequency of a wireless power transfer system based on the plurality of input voltage signals, the plurality of first output voltage signals, and the plurality of second output voltage signals.