Wireless Resonant LED Fixture for Variable Coupling Distance
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Solution Overview
Problem
Installing wireless power transmitters and power receiving components in LED light fixtures at an optimum and consistent distance is challenging, leading to variations in power transfer and light output.
Innovation Solution
A lighting device with wireless resonant coupling using a power transmitter unit and light module, where the power waveform has equal amplitudes for fundamental and third harmonic frequency components, allowing for variations in separation distance without significant changes in light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the wireless power transmitter and power receiving component are installed at a consistent optimum distance, then power transfer efficiency is improved, but installation complexity and difficulty increase
Solution Approach 1:
The patent modifies the power waveform parameters by incorporating specific harmonic frequency components (particularly the third harmonic) into the transmitted power signal. This parameter change allows the system to maintain efficient power transfer across a range of separation distances, eliminating the need for precise distance calibration during installation.
2Adaptability or versatility
If the separation distance between wireless power transmitter and receiver is varied, then installation flexibility is improved, but power transfer efficiency deteriorates
Solution Approach 1:
The system dynamically adapts to varying separation distances by utilizing resonant coupling at specific frequency harmonics. The power waveform is designed to excite resonant modes that remain effective across different distances, allowing the system to maintain efficiency while accommodating installation flexibility.
Solution Approach 2:
The patent employs periodic power waveforms with specific harmonic frequency components that create resonant coupling effects. These periodic actions at fundamental and harmonic frequencies enable the system to maintain effective power transfer across varying separation distances by exploiting resonant phenomena.
3Illumination intensity
If precise consistent spacing is maintained between power transmitter and receiver, then light output consistency is improved, but device complexity increases
Solution Approach 1:
The patent changes the electrical parameters of the power waveform by incorporating specific harmonic frequency components. This parameter modification creates a power transfer system that is insensitive to spacing variations, thereby maintaining consistent light output without requiring complex spacing 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
The solution enables consistent power transfer and light output despite variations in separation distance between the wireless power transmitter and receiver, accommodating up to 10 mm of separation change with minimal light variation.
Implementation Method 1
a wireless power transmitter unit configured to provide power to the light module wirelessly by transmitting a power waveform to the light module
Implementation Method 2
An amplitude of a fundamental frequency component of the power waveform equals an amplitude of a third harmonic frequency component of the power waveform
Data Source
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.