Wireless Power Transmission System Using Electromagnetic Waves
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Solution Overview
Problem
Conventional wireless charging methods, such as inductive charging, face limitations in charging speed, convenience due to distance constraints, and inefficiency due to radiative and thermal energy losses.
Innovation Solution
A wireless power transmission system utilizing a wireless transmitter with a DC power supply, a flat coil, and MOSFET amplifiers to generate electromagnetic waves, and a wireless receiver with a flat coil or copper coil around a graphite core, capable of converting received power to DC and regulating voltage for charging devices without the need for alignment or a charging pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If inductive charging is used to enable wireless power transfer, then wireless charging capability is achieved, but charging speed is slower and efficiency is reduced due to radiative and thermal energy losses
Solution Approach 1:
The patent changes the fundamental operating parameters from low-frequency inductive coupling to high-frequency electromagnetic wave generation. The transmitter uses oscillating current at frequencies that generate electromagnetic waves, with the receiver tuned to resonate at the same frequency, enabling more efficient energy transfer with reduced losses.
Solution Approach 2:
The patent replaces the mechanical contact required by wired charging with wireless electromagnetic wave transmission. Instead of direct electrical connection through plugs and sockets, energy is transmitted through electromagnetic waves generated by the transmitter and received by the resonant receiver circuit.
2Length of stationary object
If resonant inductive coupling is used to increase distance between coils, then operational distance is improved, but alignment requirements and complexity increase
Solution Approach 1:
The patent transitions from planar inductive coupling to three-dimensional electromagnetic wave propagation. The transmitter generates electromagnetic waves that radiate in multiple directions, and the receiver can capture energy from these waves without requiring precise planar alignment, adding spatial freedom to the power transfer system.
Solution Approach 2:
The patent changes the coupling mechanism from magnetic field-based inductive coupling to electromagnetic wave-based resonance. This parameter change allows energy transmission through air space without requiring the coils to be in close proximity or properly aligned, as electromagnetic waves can propagate freely in three-dimensional space.
3Ease of operation
If conventional inductive charging coils are used, then wireless power transfer is achieved, but charging pad or docking station is required
Solution Approach 1:
The patent extracts the wireless power transfer capability from the fixed charging pad infrastructure. By using electromagnetic wave generation and resonant reception, the system eliminates the need for dedicated charging pads or docking stations, allowing portable receivers to be powered anywhere within the transmitter's radiation field.
Solution Approach 2:
The transmitter design creates a universal power transmission system that can charge multiple types of devices simultaneously without requiring device-specific charging pads. The electromagnetic wave approach is device-agnostic, allowing any receiver with the appropriate resonant frequency to be powered by the same transmitter.
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 power transfer over greater distances with higher efficiency and convenience, eliminating the need for coil alignment and charging pads, while maintaining low power loss.
Implementation Method 1
The wireless transmitter generates electromagnetic waves to a wireless receiver having a flat coil or loop inductor
Implementation Method 2
a second induction coil in the mobile device (or an associated inductive charging station) takes power from the electromagnetic field and converts it back into electric current
Data Source
AI summary
The wireless power transmission system includes a wireless transmitter and wireless receiver for transmission of power. The wireless transmitter includes a DC power supply between 6V and 12V, which may be supplied by a lead-acid battery, or other source. A flat coil defines a radiator, and at least one capacitor parallel to the coil defines a tank circuit. Two banks of MOSFET amplifiers are disposed between the power supply and the tank circuit, each bank having parallel MOSFETS for greater current and power. Two diodes alternately switch the banks on and off. The wireless transmitter generates electromagnetic waves to a wireless receiver having a flat coil or loop inductor to receive the transmission of power, the receiver having a half-wave rectifier and a Zener diode to convert the received power to DC and regulate the voltage for charging a user device, such as a cell phone or other electronic device.