Self-Powered Switch Using Electromagnetic Induction
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Solution Overview
Problem
Conventional switches that wirelessly control electrical devices require either battery power or a hard-wired connection to a power source, limiting their application and convenience.
Innovation Solution
A self-powered switch design that includes a magnet assembly with a coil and a permanent magnet, where movement of a user input member induces a voltage to power a transmitter, eliminating the need for batteries or wired connections by harnessing energy through electromagnetic induction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional switches use battery power or hard-wired connections to enable wireless control of electrical devices, then wireless control functionality is achieved, but device complexity and installation requirements increase
Solution Approach 1:
The switch generates its own operating power through electromagnetic induction from the actuator's mechanical movement. The magnet assembly (permanent magnet + coil) converts the kinetic energy of toggling into electrical energy to power the wireless transmitter, eliminating dependence on external power sources and making the device self-sufficient
Solution Approach 2:
The patent replaces the conventional electrical power delivery system (batteries or hard-wired connections) with a mechanical energy conversion system. The mechanical movement of the actuator is directly converted into electrical energy through electromagnetic induction, substituting the need for external power infrastructure
2Ease of operation
If conventional switches require battery power, then wireless control is enabled, but maintenance requirements and environmental impact worsen
Solution Approach 1:
The invention eliminates the use of batteries entirely, replacing them with a perpetual energy generation system. The magnet assembly provides continuous power generation capability without requiring periodic replacement of consumable power sources, making the device maintenance-free and environmentally friendly
Solution Approach 2:
The switch continuously generates its own power through normal operational use. Each actuation of the switch replenishes the energy stored in the capacitor, creating a self-sustaining system that requires no external maintenance or power source replacement
3Reliability
If conventional switches use hard-wired power connections, then reliable power supply is achieved, but installation complexity and adaptability worsen
Solution Approach 1:
The patent replaces the fixed electrical connection system with a mechanical energy harvesting system. The electromagnetic induction mechanism converts mechanical actuation into electrical power, allowing the device to be installed anywhere without requiring access to electrical wiring infrastructure
Solution Approach 2:
The switch serves multiple functions: it acts as a mechanical actuator, an electromagnetic generator, a power storage device (via capacitor), and a wireless transmitter. This multi-functionality eliminates the need for separate power delivery infrastructure, enabling universal installation in any location
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 wireless control of electrical devices without the need for batteries or wired power sources, providing a convenient and versatile solution for controlling appliances.
Implementation Method 1
At least one of the magnet assembly and permanent magnet moves in response to movement of the user input member to thereby induce a voltage to power a transmitter associated with the switch
Data Source
AI summary
Self-powered switches include an externally accessible user input member, a switch housing attached to the user input member, a permanent magnet held in the switch housing, a magnet housing held in the switch housing that is attached to the user input member, the magnet housing having a spindle that extends laterally outward from opposing sides of an upper portion of the magnet housing. The spindle is attached to the switch housing. The switches also include a magnet assembly that includes a coil and a shaft extending a distance beyond the coil held in the switch housing. A least one of the magnet assembly and permanent magnet moves in response to movement of the user input member.