Wireless Power Receiver Circuit Resonant Response Control
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Solution Overview
Problem
Current wireless power receiver devices face challenges in providing a constant voltage or current to electrical loads and efficiently shutting down resonant responses when power is not needed, leading to unnecessary heat dissipation and power consumption.
Innovation Solution
The development of wireless power receiver circuits that utilize a pulse-width-modulated (PWM) design with an electrically-controllable switch, allowing for the regulation of load parameters to maintain constant voltage or current and shutting down the resonant response using a low-frequency switching mechanism, implemented with low-speed, inexpensive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high-speed switching circuit is used to shut down the resonant response, then the resonant response can be shut down effectively, but the cost increases due to expensive high-speed components
Solution Approach 1:
The patent changes the switching frequency parameter from high-speed to low-speed operation. The receiver device shuts down its resonant response at a low switching frequency, allowing the use of inexpensive low-speed switching components while still achieving effective resonant response termination and power consumption reduction.
2Ease of operation
If the resonant response is not shut down when power is not needed, then the receiver device is ready to receive power, but power is wasted and heat is dissipated
Solution Approach 1:
The patent implements periodic switching of the resonant response on and off based on power delivery conditions. When the load receives sufficient power, the controller shuts down the resonant response periodically, reducing power consumption and heat dissipation while maintaining the ability to quickly resume power reception when needed.
Solution Approach 2:
The patent uses feedback from the power delivery status to control the resonant response. The controller monitors whether the load is receiving sufficient power and uses this information to determine when to shut down or maintain the resonant response, optimizing the balance between readiness and energy efficiency.
3Reliability
If a constant voltage or current is provided to the load, then the load operates reliably, but the system requires complex regulation mechanisms
Solution Approach 1:
The patent enables the receiver device to self-regulate power delivery by controlling its own resonant response. The receiver monitors the power transfer conditions and automatically adjusts or shuts down its resonant response to maintain appropriate voltage or current levels at the load, eliminating the need for complex external regulation mechanisms.
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
The solution effectively provides a constant voltage or current to electrical loads while reducing power consumption and heat dissipation by efficiently managing the resonant response, improving both safety and efficiency in wireless power transfer systems.
Implementation Method 1
the resonator circuit is configured to resonate at a frequency of an ambient magnetic field generated by a wireless power transmitter
Implementation Method 2
The transmitter is electrically coupled to a source of power and converts the power to a time-varying electromagnetic (EM) field. The one or more receiver devices receive the power via the EM field
Implementation Method 3
The resonator circuit includes an electrically-controllable switch, configured to open in order to shut down the resonant response of the resonator circuit
Data Source
AI summary
A wireless power receiver circuit and method for use in a wireless power transfer system are provided for providing a constant current and voltage to an electrical load, such as a chemical cell device. A wireless power receiver circuit include a first comparator circuit and a second comparator circuit configured to receive output signals output from the DC load circuit, compare the received output signal with a preselected reference voltage signal, and output first and second sub-control signals, respectively. A logical gate may generate a control signal based on a comparison of the first sub-control signal and the second sub-control signal, and feed the control signal back to a resonator circuit to control a state of an electrically-controllable switch.