Variable Speed Charging Coil for Vehicle Noise Reduction
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Solution Overview
Problem
Conventional mobile terminal charging apparatuses generate uncomfortable operation sounds when the charging coil moves from the charging position to the standby position after charging is completed or interrupted, particularly disturbing drivers in vehicles.
Innovation Solution
The charging coil is moved from the charging position to the standby position at a lower velocity than its movement to the charging position, reducing the operation sound by using a control section to manage the movement of the charging coil through X-axial and Y-axial drive shafts, and employing position detection coils to determine the correct standby position, ensuring minimal disturbance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the charging coil moves from the charging position to the standby position at high velocity, then the charging response time is improved, but the operation sound becomes loud and uncomfortable for users
Solution Approach 1:
The patent applies dynamics by making the charging coil's movement velocity variable rather than constant. The driving section controls the charging coil to move at different velocities depending on the movement direction: higher velocity when moving to the charging position (prioritizing response time) and lower velocity when moving to the standby position (prioritizing noise reduction). This dynamic velocity adjustment resolves the contradiction between charging response time and operation sound comfort.
2Productivity
If the charging coil moves quickly to the charging position, then the charging efficiency is improved, but the operation sound during position change becomes disturbing
Solution Approach 1:
The patent applies local quality by differentiating the movement characteristics based on the specific operational context. The driving section implements localized quality control where the charging coil receives different velocity treatments for different movement purposes: fast movement for charging operations (maintaining productivity) and slow movement for standby positioning (reducing harmful sounds). This contextual differentiation resolves the contradiction between charging efficiency and operation sound.
3Ease of operation
If the charging coil is moved at high speed for quick charging, then the user convenience is improved, but the sound generated during coil movement causes user discomfort
Solution Approach 1:
The patent resolves the contradiction between user convenience and operation sound by implementing dynamic velocity control. The driving section adjusts the charging coil's movement speed based on operational requirements: high speed when user convenience benefits from quick charging response, and low speed when user comfort benefits from reduced noise during standby positioning. This dynamic adaptation maintains ease of operation while minimizing harmful sounds.
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 significantly reduces the operation sound when the charging coil moves to the standby position, making the process less uncomfortable for users, particularly in vehicle environments where sound sensitivity is high.
Implementation Method 1
the mobile terminal placement plate is provided with a plurality of detection coils that detect the position of a mobile terminal placed on the top surface of the mobile terminal placement plate
Implementation Method 2
non-contact charging that uses no cables has been attracting attention
Data Source
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AI summary
The present invention pertains to a mobile terminal charging device, and a vehicle using the same, and the objective of the present invention is to reduce user discomfort. In order to achieve this objective, the present invention moves a charging coil (8) from a charging position to a standby position by means of motors (28, 33) when charging is complete, or when charging is discontinued. The speed when the charging coil (8) is thus moved from the charging position to the standby position is lower than when the charging coil (8) is moved from the standby position to the charging position, and operating noise at the time can be minimised.