Wireless Power Transmitter Differential Signal Control

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Solution Overview

Problem

Resonance-type wireless power transmission systems face efficiency deterioration due to deviations in electronic components, limited switching speed, phase differences between transmitter and receiver resonators, and harmonic radiation, which affect power transmission efficiency.

Innovation Solution

An apparatus and method for controlling differential signals in a wireless power transmitter that includes a converter to generate differential signals, an amplifier to amplify these signals, a gauge to measure phase difference and amplitude, and a controller to adjust pulse width, ensuring optimal phase and amplitude matching between the transmitter and receiver resonators.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If resonance-type wireless power transmission is used, then wireless power transfer is achieved, but transmission efficiency deteriorates due to phase difference between transmitter and receiver resonators

Engineering Contradiction:
Improvepower transmission efficiencyVSAvoidenergy loss due to phase difference
Core Design Contradiction:
Use of energy by moving objectVSLoss of energy

Solution Approach 1:

The patent implements a feedback mechanism where the gauge measures the actual phase difference and amplitude between differential signals, and the controller uses this measurement to adjust the pulse width and timing of differential signals. This closed-loop feedback system dynamically compensates for phase differences caused by component deviations and varying transmission distances, thereby improving power transmission efficiency and reducing energy loss.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent introduces dynamic adjustment capability by making the pulse width and signal timing variable rather than fixed. The controller dynamically modifies these parameters based on real-time measurements from the gauge, allowing the system to adapt to changing conditions such as phase differences and amplitude variations, thus optimizing transmission efficiency under different operating conditions.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If electronic components are used in the wireless power transmitter, then the system can operate, but transmission efficiency deteriorates due to component deviation and parasitic components

Engineering Contradiction:
Improvesystem operabilityVSAvoidenergy loss due to component deviation
Core Design Contradiction:
Ease of operationVSLoss of energy

Solution Approach 1:

The gauge continuously measures the actual performance of electronic components including their deviations and parasitic effects. The controller uses this feedback information to compensate for component imperfections by adjusting signal parameters, thereby maintaining system operability while minimizing energy loss caused by component deviations.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent changes operating parameters such as pulse width, signal amplitude, and timing based on measured component characteristics. By adapting these parameters to match the actual component performance rather than ideal specifications, the system compensates for component deviations and parasitic effects, reducing energy loss while maintaining operability.

Inventive Principle:
Principle #35Parameter changes

3Power

If differential signals are amplified to improve power transfer, then transmission efficiency improves, but harmonic radiation increases

Engineering Contradiction:
Improvepower transfer capabilityVSAvoidharmonic radiation
Core Design Contradiction:
PowerVSObject-generated harmful factors

Solution Approach 1:

The gauge measures the characteristics of amplified differential signals including any harmonic content. The controller uses this feedback to adjust the amplification parameters and signal timing to minimize harmonic generation while maintaining adequate power transfer capability, thus reducing harmful harmonic radiation.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent dynamically adjusts amplification parameters such as gain, bandwidth, and signal timing based on measured conditions. By optimizing these parameters, the system achieves adequate power transfer while minimizing the generation of harmonic radiation, balancing power capability with harmful factor reduction.

Inventive Principle:
Principle #35Parameter changes

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 improves transmission efficiency and reduces harmonic radiation by adaptively controlling the differential signals, ensuring high efficiency and effective power transfer in resonance-type wireless power transmission systems.

Implementation Method 1

a converter configured to convert a single signal into differential signals

Methodology Applied
Scientific EffectSignal conversion:

Implementation Method 2

an amplifier operably coupled to the converter and configured amplify power of the differential signals

Methodology Applied
Scientific EffectSignal amplification:

Implementation Method 3

a gauge operably coupled to the amplifier and configured to measure a phase difference and amplitude between the amplified differential signals

Methodology Applied
Scientific EffectPhase and amplitude measurement:

Implementation Method 4

a controller for converting a pulse width of the differential signals by controlling the converter according to measurements by the gauge

Methodology Applied
Scientific EffectPulse width modulation:

Implementation Method 5

The resonance-type wireless power Tx may generate a magnetic field which vibrates at a specific resonance frequency in a transmission coil

Methodology Applied
Scientific EffectMagnetic resonance: Resonance

Implementation Method 6

a magnetic induction scheme for wirelessly transmitting power by using a magnetic field induced from a coil

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 7

The resonance-type wireless power Rx may charge a battery by intensively receiving the magnetic field which vibrates at the specific frequency through a reception coil

Methodology Applied
Scientific EffectMagnetic resonance: Resonance

Implementation Method 8

a magnetic induction scheme for wirelessly transmitting power by using a magnetic field induced from a coil

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS9923407B2Apparatus and method for controlling differential signals of wireless power transmitter
Publication Date: 2018.03.20 SAMSUNG ELECTRONICS CO LTD
  • US9923407B2 patent drawing
  • US9923407B2 patent drawing
  • US9923407B2 patent drawing

AI summary

Various embodiments of the present disclosure relate to an apparatus and method for controlling a differential signal of a wireless power transmitter. For example, an apparatus for controlling a differential signal of a wireless power transmitter may include a converter configured to convert a single signal into differential signals; an amplifier operably coupled to the converter and configured amplify power of the differential signals, thereby providing amplified differential signals; a gauge operably coupled to the amplifier and configured to measure a phase difference and amplitude between the amplified differential signals; and a controller for converting a pulse width of the differential signals by controlling the converter according to measurements by the gauge. Further, various embodiments of the present disclosure also include other embodiments other than the aforementioned embodiments.