Adaptable Power Rectifier for Wireless Charger Systems
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Solution Overview
Problem
Conventional power converters struggle to adaptively rectify alternating current (AC) to direct current (DC) under varying input voltage and load conditions, leading to inefficiencies and voltage fluctuations in electronic devices, especially in wireless charging systems where input voltage and impedance can be unpredictable.
Innovation Solution
A power converter with a rectifier circuit that switches between full-wave and voltage doubler rectifying modes based on input voltage thresholds, utilizing voltage-controlled switches and processing circuitry to monitor and adjust the rectification mode, ensuring a stable DC output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-mode rectifier circuit is used, then the device complexity is reduced, but the adaptability to varying input voltage and load conditions deteriorates
Solution Approach 1:
The rectifier circuit is designed to perform multiple rectification functions (full-wave rectification and voltage doubling) using a unified circuit structure with controllable switches. The same circuit components can operate in different modes depending on the control signals, allowing the system to adapt to varying input voltages without requiring separate dedicated circuits for each function.
Solution Approach 2:
The rectifier circuit incorporates controllable switches that can dynamically change their conduction states based on real-time monitoring of input voltage levels. This dynamic switching capability allows the circuit to transition between full-wave rectification mode and voltage doubler mode, enabling adaptation to changing operating conditions while maintaining a relatively simple fixed circuit topology.
2Stability of the object's composition
If a conventional single-mode rectifier circuit is used, then the device complexity is reduced, but the output voltage stability deteriorates
Solution Approach 1:
The system incorporates a monitoring mechanism that continuously detects input voltage levels and provides feedback to the control circuitry. Based on this feedback, the control circuitry adjusts the conduction states of the controllable switches to select the appropriate rectification mode, thereby maintaining stable output voltage despite variations in input voltage or load conditions.
Solution Approach 2:
The rectifier circuit changes its operational parameters (conduction states of switches) based on the detected input voltage level. When input voltage exceeds a threshold, the circuit operates in full-wave rectification mode; when it falls below the threshold, it switches to voltage doubler mode. This parameter adjustment enables the circuit to maintain stable output voltage across varying input conditions.
3Adaptability or versatility
If the rectifier circuit switches between modes, then the adaptability to varying conditions is improved, but the device complexity increases
Solution Approach 1:
The same controllable switches serve multiple functions: they act as rectifying elements in full-wave mode and as switching elements for voltage doubling. This multi-functionality reduces the need for additional dedicated components for mode switching, thereby limiting the increase in overall circuit complexity while still achieving adaptability to varying load demands.
4Stability of the object's composition
If the rectifier circuit switches between modes, then the output voltage stability is improved, but the device complexity increases
Solution Approach 1:
The processing circuitry monitors input voltage levels and automatically adjusts the rectification mode based on real-time conditions. This feedback mechanism ensures stable output voltage without requiring complex manual intervention or additional stabilization components, as the mode switching itself provides the voltage regulation function.
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 adaptive rectification mode ensures a substantially constant DC output voltage, improving efficiency and stability in electronic devices by compensating for varying input voltages and load impedances, thereby enhancing power delivery in wireless charging systems.
Implementation Method 1
a first inductive coil configured to output a first induced current and a second inductive coil configured to output a second induced current
Data Source
AI summary
A power converter including a rectifier circuit and a method for rectifying an incoming alternating current. The rectifier circuit may alter its output voltage according to varying conditions of the power converter. The variations may include voltage changes at the input or output.