Non-Contact Power Transmission Device Interference Control
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Solution Overview
Problem
In power transfer systems that use non-contact methods, as the capability to transfer larger powers over greater distances increases, there is a growing risk of faults such as heat generation and device failure due to surplus power, and interference from multiple power transmission devices can lower transfer efficiency by obstructing resonance operations.
Innovation Solution
A power transmission device with a communication part, a power transmission part, and a determination part that selectively controls power transmission based on external power transmission information, allowing it to transmit power to a receiving device without interference from other devices by determining if power can be transmitted based on received information and controlling the transmission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power transmission capability is increased to transfer larger power over greater distances, then user convenience and power transfer efficiency are improved, but the risk of faults such as heat generation and device failure due to surplus power increases
Solution Approach 1:
The patent implements a communication mechanism where the power receiving device sends power reception status information back to the power transmission device. The transmission device uses this feedback to determine whether to transmit power and adjusts transmission based on the receiving device's actual power needs, preventing surplus power reception that causes heat generation and device failure.
2Adaptability or versatility
If multiple power transmission devices operate simultaneously to increase system versatility, then adaptability is improved, but transfer efficiency is reduced due to interference from multiple magnetic fields obstructing resonance operations
Solution Approach 1:
The patent implements a preliminary determination mechanism where the power transmission device communicates with external transmission devices before starting power transmission. It determines whether power can be transmitted by checking for interfering magnetic fields from other transmission devices, and only proceeds with transmission when conditions are favorable, preventing resonance obstruction and energy loss.
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
Enables efficient and interference-free power transfer from one power transmission device to a power receiving device even when multiple power transmission devices are present, reducing the risk of faults and maintaining high transfer efficiency.
Implementation Method 1
a power transmission part that transmits power to a power receiving device that receives the transmitted power in a non-contact manner
Implementation Method 2
When a power transfer system transfers power using resonance of a magnetic field (or an electric field), the power receiving device can receive power from the power transmission device having a still higher coupling coefficient
Implementation Method 3
a communication part that performs communication with an external power transmission device that transmits power
Data Source
AI summary
There is provided a power transmission device including a communication part that performs communication with an external power transmission device that transmits power, a power transmission part that transmits power to a power receiving device that receives the transmitted power in a non-contact manner, a determination part that determines whether power can be transmitted, based on external power transmission information received by the communication part indicating a start of power transmission by the external power transmission device, and a power transmission control part that controls the power transmission part to selectively transmit power based on a determination result from the determination part.