Wireless Power Feeding Device With Magnetic Structure
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Solution Overview
Problem
Existing wireless power transmission devices face issues with high electricity consumption, slow response time, and limited range due to the need for actuators to move coils into position, and they cannot charge devices that are moving.
Innovation Solution
A power feeding device with a magnetic structure comprising two magnetic bodies and a power feeding coil that generates an alternating magnetic field, allowing power transmission without moving the coil, enabling broad range coverage and continuous charging even if the receiving device moves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an actuator such as servomotor is used as the moving mechanism for moving the power supply coil, then the power supply coil can be positioned to match the induction coil, but power is consumed in the use except the original use of wireless power transmission
Solution Approach 1:
The patent removes the actuator (servomotor) from the system entirely. Instead of using a moving mechanism to position the power supply coil, the invention uses a magnetic structure with two magnetic bodies that face each other to guide and concentrate the magnetic field, allowing the power supply coil to effectively reach the induction coil without physical movement. This extraction of the moving mechanism eliminates the associated power consumption while maintaining positioning capability through magnetic field guidance.
2Reliability
If the moving mechanism is controlled to move so as to make the power supply coil get close to the induction coil after position detection, then positioning accuracy is improved, but the time for positioning the power supply coil and the induction coil is needed from placing the apparatus with a built-in battery on the charging stand to starting to charge the built-in battery
Solution Approach 1:
The magnetic structure is pre-configured with two magnetic bodies facing each other, creating a magnetic field pathway before the charging process begins. When the power receiving device is placed on the charging stand, the magnetic field is already in position to guide the power supply coil's magnetic field to the induction coil, eliminating the need for time-consuming positioning movements. The system is prepared in advance with the magnetic guidance structure in place.
3Device complexity
If the power supply coil is fixed in position, then device complexity is reduced, but the arrangement range is limited in which power can be transmitted to the power receiving device
Solution Approach 1:
The patent introduces a magnetic structure as an intermediary between the power supply coil and the induction coil. The two magnetic bodies face each other and create a magnetic field pathway that extends the effective charging range. This magnetic intermediary guides and concentrates the magnetic field over a broader area, allowing the fixed power supply coil to effectively charge devices placed at various positions within the expanded range without requiring mechanical movement.
4Device complexity
If the power supply coil is fixed in position, then the structure is simpler, but even in the case that the position of the power receiving device always changes, power transmission cannot follow the movement
Solution Approach 1:
The magnetic structure acts as a magnetic field intermediary that maintains a consistent magnetic pathway between the fixed power supply coil and the moving induction coil. As the power receiving device moves, the magnetic field guided by the two magnetic bodies automatically adjusts and follows the movement, providing continuous power transmission. The magnetic intermediary creates a flexible magnetic connection that adapts to position changes without requiring mechanical tracking.
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 solution reduces unnecessary electricity consumption, enhances response time for power transmission, and allows power transmission to devices regardless of their position, providing stable and efficient wireless charging across a broader range.
Implementation Method 1
a power feeding coil device which receives power from a power supply and generates an alternating magnetic field
Data Source
AI summary
A power feeding device which wirelessly transmits power towards a power receiving device equipped with a power receiving coil device, comprising: a magnetic structure having two magnetic bodies; and a power feeding coil device which receives power from a power supply and generates an alternating magnetic field, the mutual main surfaces of the two magnetic bodies face each other, and the two magnetic bodies are disposed to be separated at a predetermined distance, the power feeding coil device is disposed at any position between the two magnetic bodies, the two magnetic bodies receive the alternating magnetic field during power transmission, and a power feeding region in which transmitting power towards the power receiving coil device is possible is formed between the two magnetic bodies.