Resonant Inductive Power Transfer for Flush-Mounted Door Systems
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Solution Overview
Problem
Existing power transfer systems between a door and a door frame face challenges such as the need for wiring or exposed spring-loaded contacts, which are prone to damage and contamination, and fail to efficiently transfer power across varying gaps without occupying excessive space.
Innovation Solution
A resonant inductive power transfer system with transformer portions seated flush within the door and frame, using a transmitter unit with a Royer oscillator and rectifier to generate a constant electromagnetic field that can cross gaps of varying lengths, and a receiver unit with rectifier and voltage regulator to maintain a stable DC voltage for powering locks or other loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire-based power transfer or spring-loaded contacts are used to transfer power between door and frame, then electrical connection is established, but the system becomes prone to damage, contamination, and electrical shock risks
Solution Approach 1:
The patent replaces mechanical wire-based power transfer and spring-loaded contacts with a resonant inductive coupling system using electromagnetic fields. The transmitter coil in the door frame and receiver coil in the door create a magnetic coupling that transfers power wirelessly, eliminating exposed electrical contacts and mechanical connections that are susceptible to contamination and damage.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary medium to transfer power between the door and frame. The resonant inductive coupling creates a magnetic field that acts as a mediator, allowing power transfer across the gap without direct physical contact, thereby eliminating the harmful effects associated with exposed electrical contacts.
2Reliability
If transmitter and receiver units are positioned to ensure efficient power transfer across varying gaps, then power transfer efficiency improves, but the components must extend beyond the plane of the door or frame making them exposed and prone to damage
Solution Approach 1:
The patent employs adjustable angled brackets that allow the transmitter and receiver units to be positioned at various angles relative to each other. This angular adjustment provides an additional degree of freedom, enabling the coils to be oriented optimally for magnetic coupling while remaining flush-mounted and protected within the door and frame planes.
Solution Approach 2:
The patent incorporates adjustable mounting mechanisms that allow the transmitter and receiver units to be dynamically positioned and angled during installation. This adjustability enables optimization of the magnetic coupling angle to maintain efficient power transfer across varying gaps while keeping the components protected within the door and frame structures.
3Ease of operation
If resonant inductive coupling is used to transfer power wirelessly across the gap, then wire-free power transfer is achieved, but the electromagnetic field may not properly transfer across gaps of unique characteristics
Solution Approach 1:
The patent uses adjustable angled brackets and mounting mechanisms that allow the transmitter and receiver coils to be dynamically positioned and oriented. This adjustability enables optimization of the magnetic coupling angle and distance for each specific installation scenario, ensuring reliable electromagnetic field transfer across gaps with unique characteristics such as varying widths, materials, or orientations.
Solution Approach 2:
The patent allows adjustment of critical parameters including the angle between coils, the distance across the gap, and the orientation of the magnetic fields. By optimizing these parameters during installation, the system adapts to different gap characteristics and ensures reliable resonant inductive coupling for power transfer.
4Area of stationary object
If components are installed to occupy minimal space in door and frame, then compact installation is achieved, but the power transfer capability may be insufficient
Solution Approach 1:
The patent utilizes angular adjustment as an additional dimension to optimize power transfer. By allowing the coils to be positioned at various angles rather than requiring only linear distance adjustment, the system achieves effective magnetic coupling within a compact footprint, maximizing power transfer capability within the constrained space of the door and frame.
Solution Approach 2:
The patent optimizes power transfer within limited space by adjusting critical parameters such as coil angle, orientation, and spacing. These parameter optimizations enable the system to achieve sufficient power transfer capability for electrified locking mechanisms while maintaining a compact installation that occupies minimal space in the door and frame.
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, wire-free power transfer across gaps of unique characteristics without exposing components, ensuring reliable operation and compact installation, while minimizing the risk of damage and contamination.
Implementation Method 1
A resonant inductive power transfer system with transformer portions seated flush within the door and frame, using a transmitter unit with a Royer oscillator and rectifier to generate a constant electromagnetic field that can cross gaps of varying lengths
Implementation Method 2
resonant inductive power coupling between a first object and a second object
Implementation Method 3
a receiver unit with rectifier and voltage regulator to maintain a stable DC voltage for powering locks or other loads
Data Source
AI summary
What is presented is a power-transfer system that provides resonant inductive power from a first object to a second object, which is adjacent to the first object. The system includes a first transformer portion that is positioned on the first object and having a first core portion. The first core portion includes a transmit unit configured to transfer an electromagnetic field to the second transformer portion. The first core portion also includes first circuitry that allows the transmit unit to transfer the electromagnetic field. The second transformer portion is positioned on the second object and has a second core portion. The second core portion includes a receiver unit configured to receive the electromagnetic field. The second core portion also includes second circuitry that allows the transmit unit to transfer the electromagnetic field.