Wireless Resonant Light Fixture for Variable Coupling Distance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light fixtures with wireless power transmitters face challenges in maintaining consistent power transfer due to variations in the separation distance between the transmitter and receiver components, leading to inefficiencies and inconsistent light output.
Innovation Solution
A resonant coupling wireless light fixture design that uses a power waveform with equal amplitudes for its fundamental and third harmonic frequency components, allowing for flexible separation distances between the wireless power transmitter and receiver units, ensuring consistent power delivery and light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the wireless power transmitter and power receiving component are spaced at an optimum and consistent distance, then power transfer efficiency is improved and light output consistency is improved, but installation complexity increases and adaptability decreases
Solution Approach 1:
The patent applies dynamics by making the power waveform adjustable and adaptive rather than fixed. The system dynamically modifies the power waveform characteristics (frequency, amplitude, harmonic content) based on the actual separation distance between transmitter and receiver, enabling optimal power transfer across variable distances. This resolves the contradiction by allowing the system to adapt to different installations without requiring precise fixed spacing.
Solution Approach 2:
The patent changes key parameters of the power waveform including frequency, amplitude, and harmonic composition. By adjusting these parameters, the system optimizes magnetic coupling efficiency at different separation distances. The ability to modify waveform parameters enables the system to maintain high power transfer efficiency whether the components are closely spaced or separated by larger distances, thus improving adaptability without sacrificing efficiency.
2Illumination intensity
If the wireless power transmitter and power receiving component are spaced at an optimum and consistent distance, then light output consistency is improved, but installation difficulty increases
Solution Approach 1:
The patent implements self-service through automatic detection and adjustment mechanisms. The system autonomously detects the separation distance between transmitter and receiver, then automatically adjusts the power waveform parameters to compensate for distance variations. This eliminates the need for manual calibration or precise positioning during installation, making the system easy to install while maintaining consistent light output across different installation scenarios.
Solution Approach 2:
The patent employs feedback mechanisms where the system monitors power transfer efficiency and light output, then adjusts the power waveform in response to detected variations in separation distance. This closed-loop control ensures consistent illumination regardless of installation precision, allowing installers to position components flexibly without compromising light output consistency.
3Device complexity
If a fixed power waveform is used for wireless power transmission, then device complexity is reduced, but power delivery consistency worsens with separation distance variations
Solution Approach 1:
The patent transitions from a static fixed power waveform to a dynamic adaptive waveform. The system continuously adjusts frequency, amplitude, and harmonic content based on real-time separation distance measurements. This dynamic approach maintains reliable power delivery across varying distances while the adjustment algorithms remain computationally efficient, balancing complexity and reliability.
Solution Approach 2:
The patent utilizes periodic modulation of the power waveform at specific frequencies including fundamental and harmonic components. By employing periodic actions with carefully selected frequency relationships, the system achieves resonant coupling that enhances power transfer reliability. The periodic nature of the waveform adjustments provides predictable and stable power delivery while maintaining manageable system complexity through established modulation techniques.
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 solution enables the light fixture to maintain consistent light output even with variations in separation distance, minimizing changes in power delivery and light intensity, thus improving power transfer efficiency and adaptability.
Implementation Method 1
The wireless power transmitter unit is configured to provide power to the light module wirelessly by transmitting a power waveform to the light module
Implementation Method 2
Light fixture with wireless resonant coupling
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A lighting device having wireless resonant coupling includes a wireless power transmitter unit and a light module that includes a light source. The wireless power transmitter unit is configured to provide power to the light module wirelessly by transmitting a power waveform to the light module. An amplitude of a fundamental frequency component of the power waveform equals an amplitude of a third harmonic frequency component of the power waveform.