Wireless Power Rectifier Control for Faster Voltage Regulation
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Solution Overview
Problem
Existing wireless charging systems face challenges in efficiently regulating the rectified voltage at the receiving device, leading to inefficiencies and limitations in power transfer rates.
Innovation Solution
The implementation of a wireless power receiving device with voltage regulator circuitry that overrides the rectifier controller by activating a subset of rectifier switches when the voltage across a capacitor is zero, thereby boosting the rectified voltage and improving power regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a wireless power receiving device uses a rectifier controller to regulate rectified voltage, then the system can maintain stable voltage output, but the voltage regulation speed is limited and power transfer rates are constrained
Solution Approach 1:
The patent implements dynamic control of rectifier switches by detecting the voltage across the capacitor and dynamically adjusting which switches are activated. The voltage regulator circuitry overrides the rectifier controller to activate a subset of rectifier switches when capacitor voltage is zero, enabling faster response to voltage changes and improving regulation speed without excessive complexity
Solution Approach 2:
The patent employs feedback mechanisms where the voltage regulator circuitry continuously monitors the voltage across the capacitor and the rectifier output voltage. This feedback enables the system to detect when capacitor voltage is zero and appropriately override the rectifier controller, creating a closed-loop control system that achieves faster voltage regulation while maintaining stability
2Power
If the rectifier controller activates all rectifier switches to maximize power transfer, then power transfer rate increases, but voltage regulation precision deteriorates
Solution Approach 1:
The patent applies partial action by activating only a subset of rectifier switches rather than all switches simultaneously. The voltage regulator circuitry selectively controls which rectifier switches are activated based on capacitor voltage conditions, enabling the system to achieve adequate power transfer while maintaining precise voltage regulation through controlled, partial activation of available components
3Stability of the object's composition
If the system uses a capacitor to smooth rectified voltage, then voltage stability improves, but the regulation response time increases due to capacitor charging/discharging cycles
Solution Approach 1:
The patent implements preliminary action by detecting when the capacitor voltage is zero and proactively overriding the rectifier controller to activate appropriate rectifier switches. This anticipatory control prevents voltage drops before they occur, maintaining voltage stability while reducing response time compared to reactive control methods that would wait for voltage deviations
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 solution enables faster and more efficient voltage regulation, allowing for higher power transfer rates and improved charging times, while also simplifying system design and increasing reliability.
Implementation Method 1
a wireless power transmitting device such as a charging mat wirelessly transmits power to a wireless power receiving device such as a battery-powered, portable electronic device. The wireless power transmitting device has a coil that produces electromagnetic flux.
Implementation Method 2
The wireless power receiving device has a coil and rectifier circuitry that uses electromagnetic flux produced by the transmitter to generate direct-current power
Data Source
AI summary
A wireless charging system having a power transmitting device may wirelessly transfer power to a power receiving device. The power receiving device may include a voltage regulator that operates independently from the power transmitting device. The voltage regulator may output a rectified voltage and may activate pull-down rectifier switches during zero voltage crossings to boost the rectified voltage. The power receiving device may send control error packets to the power transmitting device to direct the power transmitting device to adjust the transmit power level.