Non-contact Power Transmission Coil Positioning
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Solution Overview
Problem
Current non-contact power transmission systems face challenges in accurately positioning primary and secondary coils across different manufacturers, sizes, types, and designs of portable terminals, leading to inefficiencies and the need for dedicated charging instruments, which limits versatility and convenience.
Innovation Solution
A structure incorporating a power transmitting device with a primary coil and a position detection circuit that automatically detects and optimizes the positional relationship between the primary and secondary coils, allowing for efficient and accurate positioning regardless of the terminal's manufacturer, size, or design, using methods such as harmonic resonance and inductance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated power transmitting instrument is used for each secondary-side instrument, then the positioning accuracy between primary and secondary coils is improved, but the device complexity and lack of versatility worsen
Solution Approach 1:
The power transmitting instrument is designed with a movable primary coil that can automatically adjust its position to accommodate different secondary-side instruments with varying coil positions and device geometries. This single instrument can serve multiple functions across different device types (portable terminals, PDAs, etc.) from various manufacturers, eliminating the need for dedicated charging instruments for each device while maintaining accurate coil positioning through automatic movement control
2Measurement precision
If manual adjustment of coil positional relationship is required, then the positioning accuracy can be improved, but the ease of operation worsens
Solution Approach 1:
The system incorporates a position detection circuit that automatically detects the relative positional relationship between the primary and secondary coils, and a movable primary coil mechanism that automatically adjusts its position based on detection results. This self-positioning capability eliminates the need for manual adjustment by users while ensuring accurate coil alignment for efficient power transmission
Solution Approach 2:
The position detection circuit continuously monitors the relative position between primary and secondary coils and provides feedback to the control system. Based on this feedback, the primary coil is automatically moved to optimize the positional relationship, creating a closed-loop control system that ensures accurate positioning without user intervention
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 a versatile and convenient next-generation non-contact power transmission system that can automatically position coils, facilitating universal compatibility and ease of use across various portable terminals, enhancing the convenience and efficiency of power transmission.
Implementation Method 1
non-contact power transmission (contactless power transmission) that utilizes electromagnetic induction to enable power transmission without metal-to-metal contact
Implementation Method 2
the primary coil being able to couple electromagnetically with a secondary coil of the power receiving device, the position detection circuit detecting a positional relationship between the primary coil and the secondary coil
Data Source
AI summary
A structure compliant with non-contact power transmission includes a placement member that includes a placement side, an electronic instrument including a non-contact power transmission power receiving device being placed on the placement side, a non-contact power transmission power transmitting device, and a position detection circuit that detects the positional relationship between a primary coil and a secondary coil. The power transmitting device detects the relative positional relationship between the primary coil and the secondary coil using a harmonic detection circuit, and drives an XY stage using an actuator to automatically position the primary coil with respect to the secondary coil, for example.