Induction Charger Coil Biasing for Closer Wireless Charging
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Solution Overview
Problem
Existing induction charging technologies face inefficiencies due to the distance between the inductor coils and the electronic devices, which affects the strength of the magnetic field and the charging rate, as conventional designs struggle to maintain optimal contact and alignment for effective energy transfer.
Innovation Solution
The charger incorporates a biasing member, such as a frame and inductor engagement member, to securely position the inductor member against the housing's interior surface, minimizing distance and enhancing magnetic field strength, thereby improving charging efficiency by ensuring consistent contact and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the inductor member is positioned closer to the charging region, then the magnetic field strength and charging efficiency increase, but the device complexity increases due to the need for biasing members and precise positioning mechanisms
Solution Approach 1:
The inductor member is designed to self-bias against the interior surface of the housing through its own magnetic attraction to ferromagnetic materials in the housing or through spring-loaded mechanisms that automatically maintain contact pressure, eliminating the need for external biasing members and reducing structural complexity while maintaining optimal positioning
Solution Approach 2:
A flexible biasing member such as a spring or elastomeric element is used to apply continuous contact force between the inductor member and the housing interior surface, ensuring consistent proximity without rigid mechanical constraints, thereby simplifying the overall structure while maintaining charging efficiency
2Strength
If the inductor member is pressed against the housing interior surface, then the distance minimization improves magnetic field strength, but the manufacturing precision requirements increase to ensure proper alignment and contact
Solution Approach 1:
The biasing member is designed to distribute contact force uniformly across the inductor member's contact surface, ensuring consistent magnetic field generation across the charging region without requiring high-precision alignment, as the flexible element compensates for minor positioning variations
Solution Approach 2:
The design allows for adjustable biasing force and inductor member positioning through modular components, enabling optimization of magnetic field strength while accommodating variations in manufacturing tolerances, thereby reducing the stringency of precision requirements
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 configuration significantly increases the charging rate by maintaining optimal proximity between the inductor coils and electronic devices, enhancing the magnetic field strength and overall charging efficiency.
Implementation Method 1
The inductor member can be positioned within the interior of the housing and electrically connected to the substrate, the inductor member configured to receive electrical current from the cable and generate a magnetic field responsive to the received electrical current, the magnetic field configured to induce electrical current in the electronic device
Data Source
AI summary
Various implementations of chargers are provided herein for inductively charging an electronic device. In some implementations, the charger includes: a housing having an interior and a charging region configured to receive a portion of the electronic device; a substrate positioned within the interior; a cable configured to connect to a power source to provide energy to the charger; and an inductor member positioned within the interior. The inductor member receives electrical current from the cable and generates a magnetic field. The magnetic field induces electrical current in the electronic device when the portion of the electronic device is positioned at the charging region. The charger further includes a biasing member arranged within the interior and configured to apply a biasing force to the inductor member such that the inductor member is pressed against a portion of an interior surface of the housing at said charging region.