Wireless Power Receiver Isolation Circuit for High-Frequency 1 W Transfer

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Solution Overview

Problem

Current high frequency wireless power transfer systems face limitations in achieving high power transfer without damaging circuitry or degrading data communications, particularly at power levels above 300 mW, due to inefficiencies and interference issues caused by additional antennas and circuitry needed for data transfer.

Innovation Solution

The implementation of a wireless receiver system with a voltage isolation circuit using inexpensive components, such as isolation capacitors, to regulate and isolate voltage levels, allowing for efficient high power transfer while maintaining data communication fidelity, even at power levels over 1 W.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If additional antennas and circuitry are used for data transfer in wireless power systems, then data communication capability is improved, but device complexity and cost increase

Engineering Contradiction:
Improvedata communication capabilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines wireless power transfer and data communication functions into a single antenna and circuit system. The same antenna used for receiving power also receives modulated data signals, and the same circuitry processes both power and data signals by detecting impedance changes or voltage variations caused by data modulation on the power transfer channel.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The wireless power receiver is designed to perform multiple functions: receiving power wirelessly and simultaneously receiving data communications through the same hardware infrastructure. The system universally handles both power transfer and data communication tasks without requiring separate dedicated components for each function.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If additional antennas and circuitry are used for data transfer, then data communication capability is improved, but manufacturing cost increases

Engineering Contradiction:
Improvedata communication capabilityVSAvoidmanufacturing cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent combines wireless power transfer and data communication functions into a single antenna and circuit system. The same antenna used for receiving power also receives modulated data signals, and the same circuitry processes both power and data signals by detecting impedance changes or voltage variations caused by data modulation on the power transfer channel.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The wireless power receiver is designed to perform multiple functions: receiving power wirelessly and simultaneously receiving data communications through the same hardware infrastructure. The system universally handles both power transfer and data communication tasks without requiring separate dedicated components for each function.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If additional antennas are used for data transfer, then data communication capability is improved, but electromagnetic interference worsens

Engineering Contradiction:
Improvedata communication capabilityVSAvoidelectromagnetic interference
Core Design Contradiction:
Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent combines wireless power transfer and data communication functions into a single antenna and circuit system. The same antenna used for receiving power also receives modulated data signals, and the same circuitry processes both power and data signals by detecting impedance changes or voltage variations caused by data modulation on the power transfer channel.

Inventive Principle:
Principle #5Merging (Combining)

4Power

If higher power levels are transferred in high frequency systems, then power transfer capability is improved, but circuit damage risk increases

Engineering Contradiction:
Improvepower transfer capabilityVSAvoidcircuit damage risk
Core Design Contradiction:
PowerVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a voltage isolation circuit as an intermediary between the high-power wireless power reception stage and the sensitive data communication controller. This isolation circuit protects the controller from high voltage spikes and power surges while still allowing data communication to function through the same antenna and circuitry.

Inventive Principle:
Principle #24Intermediary (Mediator)

5Power

If higher power levels are transferred, then power transfer capability is improved, but data communication fidelity degrades

Engineering Contradiction:
Improvepower transfer capabilityVSAvoiddata communication fidelity
Core Design Contradiction:
PowerVSLoss of information

Solution Approach 1:

The patent introduces a voltage isolation circuit as an intermediary between the high-power wireless power reception stage and the sensitive data communication controller. This isolation circuit protects the controller from high voltage spikes and power surges while still allowing data communication to function through the same antenna and circuitry.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 reliable and cost-effective high power high frequency wireless power transfer without compromising data communication fidelity, exceeding the limitations of legacy systems by allowing receipt of power levels above 1 W, while using less costly components.

Implementation Method 1

The receiver antenna is configured for coupling with the transmitter antenna and receiving the AC wireless signals from the transmitter antenna, the receiver antenna operating based on the operating frequency

Methodology Applied
Scientific EffectElectromagnetic coupling: Electromagnetic Induction

Implementation Method 2

The voltage isolation circuit includes at least two capacitors, wherein the at least two capacitors are in electrical parallel with respect to the controller capacitor. The voltage isolation circuit is configured to (i) regulate the AC wireless power signal to have a voltage input range for input to the receiver controller

Methodology Applied
Scientific EffectCapacitance: Capacitance

Data Source

PatentUS11848577B2Wireless power receiver for receiving high power high frequency transfer
Publication Date: 2023.12.19 NUCURRENT INC
  • US11848577B2 patent drawing
  • US11848577B2 patent drawing
  • US11848577B2 patent drawing

AI summary

Wireless power transfer systems, disclosed, include one or more circuits to facilitate high power transfer at high frequencies. Such wireless power transfer systems may include voltage isolation circuits, to isolate components of the wireless receiver systems from high voltage signals intended for a load associated with the receiver. The voltage isolation circuit includes at least two capacitors, wherein the at least two capacitors are in electrical parallel with respect to the controller capacitor. The voltage isolation circuit is configured to regulate the AC wireless power signal to have a voltage input range for input to the receiver controller and isolate a voltage at the receiver controller from a voltage at the load associated with the wireless receiver system. Utilizing such systems enables wireless power transfer at high frequency, such as 13.56 MHz, at voltages over 1 Watt, while maintaining durability and lifecycle of components of the wireless receiver system(s).