Wireless Power Transmitter Using Magnetic Oscillators
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies and practical limitations in transferring power over distances due to the need for physical connections and the challenges of resonant frequency matching between transmitters and receivers.
Innovation Solution
A wireless power transfer system utilizing a plurality of magnetic oscillators configured to generate time-varying magnetic fields, where each oscillator has a mechanical resonant frequency equal to the excitation frequency, allowing for efficient power transfer through a magneto-mechanical system that converts magnetic energy into mechanical and then electrical energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transfer is implemented using conventional methods, then power can be transferred without physical connections, but power transfer efficiency deteriorates over distance
Solution Approach 1:
The patent applies mechanical vibration through magnetic oscillators that are driven to resonate at a specific frequency. These oscillators create a strongly coupled resonant state between transmitter and receiver, enabling efficient energy transfer over distance without conventional physical connections. The resonant oscillation creates a localized electromagnetic field that maintains high coupling efficiency.
Solution Approach 2:
The system changes the operating parameters by tuning the resonant frequency of both transmitter and receiver oscillators to match. This frequency matching creates a strongly coupled resonant state that dramatically improves power transfer efficiency compared to conventional wireless methods. The system dynamically adjusts parameters to maintain optimal coupling conditions.
2Ease of operation
If wireless power transfer is implemented using conventional methods, then physical connections are eliminated, but power transfer distance is limited
Solution Approach 1:
By using resonant magnetic oscillators that vibrate at matched frequencies, the system extends the effective power transfer distance. The resonant coupling creates a sustained oscillatory field that maintains energy transfer capability over distances much greater than conventional inductive coupling, while still eliminating physical connections.
Solution Approach 2:
The system employs periodic oscillatory action through the magnetic oscillators that cycle between magnetic and electrical energy states. This periodic energy exchange at resonant frequency creates a sustained coupling effect that extends the distance over which power can be transferred wirelessly, beyond the limitations of static or non-resonant methods.
3Loss of energy
If resonant frequency matching is implemented between transmitters and receivers, then power transfer efficiency improves, but system complexity increases
Solution Approach 1:
The patent uses magnetic oscillators that naturally exhibit resonant behavior when driven at their characteristic frequency. This mechanical vibration approach simplifies the frequency matching process compared to electrical resonance, as the mechanical resonant frequency is determined by physical properties of the oscillator structure rather than complex electrical circuit tuning.
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 enables efficient wireless power transfer over larger distances with reduced losses, eliminating the need for physical connections and improving power transfer efficiency by matching resonant frequencies between transmitters and receivers.
Implementation Method 1
at least one excitation circuit configured to generate a time-varying first magnetic field in response to a time-varying electric current flowing through the at least one excitation circuit
Implementation Method 2
a plurality of magnetic oscillators in which each magnetic oscillator of the plurality of magnetic oscillators has a mechanical resonant frequency substantially equal to the excitation frequency
Implementation Method 3
The plurality of magnetic oscillators is configured to generate a time-varying second magnetic field in response to the first magnetic field
Data Source
AI summary
A power transmitter is configured to wirelessly transfer power to at least one power receiver. The power transmitter includes at least one excitation circuit configured to generate a time-varying first magnetic field in response to a time-varying electric current flowing through the at least one excitation circuit. The time-varying first magnetic field has an excitation frequency. The power transmitter further includes a plurality of magnetic oscillators. Each magnetic oscillator of the plurality of magnetic oscillators has a mechanical resonant frequency substantially equal to the excitation frequency. The plurality of magnetic oscillators is configured to generate a time-varying second magnetic field in response to the first magnetic field.