Wireless Power Receiver Modulation for Low Bit Error Across Power Levels
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Solution Overview
Problem
Existing wireless power transmission systems experience high communication bit error rates between transmitters and receivers at different power states, which affects the accuracy of power control and communication.
Innovation Solution
A wireless power transmission receiving circuit with multiple modulation sub-circuits that select the appropriate modulation mode based on the current power level, allowing for efficient loading of communication signals onto carrier signals to reduce demodulation errors, comprising an electrical energy-receiving oscillation circuit, rectifier circuit, and modulation circuit with multiple sub-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single modulation circuit is used in the wireless power transmission receiver, then the device complexity is reduced, but the communication bit error rate increases at different power states
Solution Approach 1:
The modulation circuit is segmented into multiple independent modulation sub-circuits (first modulation sub-circuit, second modulation sub-circuit, etc.), each capable of operating at different power levels. This segmentation allows the system to select the appropriate sub-circuit based on the current power state, thereby maintaining reliable communication across varying power conditions without requiring a single complex adaptive circuit.
Solution Approach 2:
The system dynamically selects which modulation sub-circuit to activate based on the detected power level. The controller determines the current power level and activates the corresponding modulation sub-circuit, creating a dynamic adaptation mechanism that optimizes communication reliability for each operating condition without permanently increasing the complexity of the entire system.
2Reliability
If multiple modulation sub-circuits are added to handle different power levels, then communication reliability improves, but the device complexity increases
Solution Approach 1:
Each modulation sub-circuit is designed to handle a specific power level range, making them universally applicable to different operating conditions. The controller selects the appropriate sub-circuit based on power level, allowing the system to maintain communication reliability across all power states while using simple, dedicated circuits rather than a single complex adaptive circuit.
Solution Approach 2:
The system changes the operational parameters by selecting different modulation sub-circuits based on the detected power level. Each sub-circuit is optimized for specific power level parameters, allowing the system to adapt to varying power conditions by changing which circuit is active rather than changing the circuit structure itself.
3Measurement precision
If the modulation mode is fixed, then the device complexity is reduced, but the communication accuracy deteriorates at varying power levels
Solution Approach 1:
The system employs a feedback mechanism where the controller continuously detects the current power level and uses this information to select the appropriate modulation sub-circuit. This feedback loop ensures that the communication accuracy is maintained at varying power levels by always using the modulation sub-circuit optimized for the current operating condition.
Solution Approach 2:
Multiple modulation sub-circuits are pre-configured to handle different power levels before operation begins. When the system starts, the controller detects the power level and immediately activates the corresponding pre-configured sub-circuit, eliminating the need for real-time modulation mode changes and ensuring communication accuracy from the start.
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 significantly reduces communication bit error rates, enabling reliable communication between the wireless power transmission receiver and transmitter with improved power control accuracy across varying power levels.
Implementation Method 1
an electrical energy-receiving coil L2 and a compensation capacitor C2 connected in series, and the electrical energy-receiving coil L2 may be configured to induct an alternating magnetic field to generate an induction current
Data Source
AI summary
A wireless power transmission system includes: an electrical energy-receiving oscillation circuit including an electrical energy-receiving coil L2 and a compensation capacitor C2 connected in series, the electrical energy-receiving coil L2 sensing an alternating magnetic field and generating an induction current accordingly; a rectifier circuit connected to two ends of the electrical energy-receiving oscillation circuit; and a modulation circuit including multiple modulation sub-circuits, each of the modulation sub-circuits being separately connected to the electrical energy-receiving oscillation circuit, and the modulation circuit receiving a drive signal used to select a modulation sub-circuit matching a power level of a load of the wireless power transmission receiving circuit to operate, and the modulation sub-circuits receive, during a communication process, a communication signal and load the communication signal on a carrier signal to perform modulation.