Wireless Power Distribution in Freeze-Drying Chambers
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Solution Overview
Problem
Current wireless power transmission systems fail to provide uniform power distribution within a chamber, particularly in electromagnetically challenging environments like freeze-drying chambers, where continuous monitoring of vial temperatures is necessary during lyophilization processes.
Innovation Solution
A method utilizing statistical electromagnetism to determine an optimal frequency for wireless power transmission, creating a statistical electromagnetic environment through mechanical or electronic stirring, and using power harvesters with efficiency profiles to achieve uniform power distribution across multiple positions within the chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transmission is implemented in a chamber, then power can be delivered to sensors without physical connections, but the power distribution becomes non-uniform across different positions within the chamber
Solution Approach 1:
The system dynamically adjusts the transmitter's operating frequency based on the chamber's electromagnetic resonance characteristics. By tuning to resonant frequencies, the system maximizes power distribution uniformity across the chamber volume, transforming a static non-uniform field into a dynamically optimized uniform field through frequency adaptation.
Solution Approach 2:
The patent changes the operating parameter (frequency) of the wireless power transmitter to match the chamber's resonant frequencies. This parameter adjustment transforms the electromagnetic field distribution from non-uniform to uniform, allowing effective power delivery to sensors at all positions within the chamber.
2Ease of manufacture
If the chamber dimensions are fixed, then the chamber structure is simple and easy to manufacture, but the resonant frequency and power distribution characteristics cannot be optimized
Solution Approach 1:
Rather than making the chamber structure dynamic or adjustable, the system dynamically adjusts the operating frequency to match the fixed chamber's resonant characteristics. This approach maintains structural simplicity while achieving adaptability in power distribution optimization.
3Reliability
If multiple power harvesters are deployed at different positions, then comprehensive sensor coverage is achieved, but the collective efficiency varies significantly depending on position
Solution Approach 1:
By changing the transmitter's operating frequency to match the chamber's resonant frequency, the electromagnetic field becomes uniformly distributed throughout the chamber volume. This allows power harvesters at all positions (front, center, back, top, bottom) to operate at high efficiency, eliminating the significant efficiency variations that would otherwise exist between different positions.
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
Ensures efficient and uniform power delivery to sensors within the chamber, maintaining product temperature control during lyophilization by maximizing collective efficiency and adapting criteria for acceptable statistical properties.
Implementation Method 1
creating a statistical electromagnetic environment by stirring electromagnetic waves generated by an electromagnetic source inside the chamber
Data Source
AI summary
A system is disclosed which includes a chamber, one or more transmitters configured to emit EM radiation, one or more power harvesters, one or more EM stirrer, and a processing system configured to a) receive a measure of dimensional characteristics of the chamber b) control the one or more EM stirrers, c) evaluate statistical properties of the statistical EM environment, d) set a new criterion for acceptable statistical properties of the statistical EM environment, e) measure a lowest usable frequency of the chamber below which the statistical properties are not acceptable according to a predetermined criterion, f) determine an efficiency profile of the one or more power harvesters versus frequency, g) select an operating frequency that maximizes efficiencies of the one or more power harvesters, h) measure a collective efficiency of the chamber, and i) return to step d if the measured collective efficiency is below a predetermined efficiency threshold.