Wireless Power Transmitters Beam Steering for Multi-Receptor Efficiency
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Solution Overview
Problem
Existing wireless power feeding methods face inefficiencies due to radio wave attenuation over long distances and interference between multiple power transmitters, making it difficult to continuously feed power to multiple receptors in a wide space without reducing efficiency.
Innovation Solution
A method where multiple power transmitters adjust their power transmission directions and phases to maximize received power while minimizing interference, by determining the smallest received power amount and optimizing transmission paths and phases to ensure efficient power delivery to multiple receptors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple power transmitters radiate micro waves to feed power to multiple power receptors in a wide space, then the coverage area and number of served receptors increase, but radio wave interference between transmitters occurs and transmission efficiency decreases
Solution Approach 1:
The patent divides the wide space into multiple transmission regions, with each power transmitter responsible for a specific region. Each transmitter serves one or more power receptors in its designated region, avoiding overlapping transmission paths and eliminating radio wave interference between transmitters while maintaining extensive coverage area
Solution Approach 2:
The patent optimizes transmission parameters locally for each transmitter-receptor pair based on their specific positions and requirements. Each transmitter adjusts its beam direction and transmission characteristics to precisely target its assigned receptors, maximizing transmission efficiency in each local region without affecting other transmitters
2Loss of energy
If power transmission direction is adjusted to maximize received power for one power receptor, then transmission efficiency to that receptor improves, but other power receptors may receive insufficient power
Solution Approach 1:
The patent assigns different power receptors to different power transmitters based on spatial distribution. Each transmitter is responsible for serving specific target(s) in its designated region, allowing optimization of transmission direction for each pair without compromising service to other receptors, thus resolving the conflict between maximizing efficiency for one receptor and maintaining adaptability for multiple receptors
3Device complexity
If a single power transmitter serves multiple power receptors in a wide space, then device complexity is reduced, but transmission efficiency decreases due to radio wave attenuation over long distances
Solution Approach 1:
The patent introduces multiple power transmitters distributed across the wide space, each serving a limited region with one or more power receptors. This segmentation reduces transmission distances for each transmitter, minimizing radio wave attenuation and maintaining high transmission efficiency, while the overall system complexity remains manageable through coordinated operation of multiple transmitters
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 approach enables efficient wireless power transfer to multiple receptors over a wide area without radio wave interference, ensuring continuous and optimized power delivery.
Implementation Method 1
wireless power feeding methods using electromagnetic waves (micro waves)... a system using micro waves as a wireless power transfer method... it is possible to transfer power to a power reception device which is far away using a beam of micro waves which are from several hundred MHz to several GHz
Implementation Method 2
determining a first power amount which is the smallest out of the acquired power amounts, and adjusting a power transmission direction to be a direction in which the power received by the power receptor which has received the first power amount is maximum
Data Source
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AI summary
A wireless power feeding method includes causing each of a plurality of power transmitters to acquire power amounts for power received by one or more of a power receptors which are targets for power transmission, determining a first power amount which is the smallest out of acquired power amounts, and adjusting a power transmission direction to be a direction in which the power received by the power receptor which has received the first power amount is maximum. Each of the plurality of power transmitters are caused to transmit power in the adjusted power transmission direction and leaked power amounts for leaked power, which is received by the power receptors that are the targets for power transmission of other power transmitters, are acquired as leaked power amounts to the power transmitters for which the targets for power transmission are the power receptors which receive the leaked power.