Adaptive Rectifier Voltage Fluctuation Reduction
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Solution Overview
Problem
Conventional AC-DC conversion circuits in chargers face inefficiencies due to wide input voltage ranges, leading to increased volume and manufacturing costs, as they struggle to optimize power devices and reduce voltage fluctuations.
Innovation Solution
The implementation of an adaptive rectifier that switches between boost and buck modes based on AC input voltage ranges, adjusting the DC output voltage to maintain stability and reduce fluctuations, thereby optimizing power device selection and minimizing circuit volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional AC-DC conversion circuits are used to handle wide input voltage ranges, then the charger can accommodate various input voltages, but the circuit volume increases and manufacturing costs rise
Solution Approach 1:
The patent applies dynamics by making the rectifier circuit adaptable through switching between different operating modes (boost and buck) based on input voltage conditions. The circuit dynamically adjusts its configuration using control signals to switch between power device sets, enabling the same circuit to handle wide input voltage ranges without requiring multiple fixed circuits, thus reducing overall charger volume while maintaining versatility
Solution Approach 2:
The patent segments the rectifier circuit into multiple operational sections with different power devices (first and second sets of power devices) that can be selectively activated. By dividing the circuit functionality and switching between segments based on input voltage ranges, the design avoids needing a single large circuit capable of handling all voltage conditions, thereby reducing component size and charger volume
2Adaptability or versatility
If conventional AC-DC conversion circuits are used to handle wide input voltage ranges, then the charger can accommodate various input voltages, but manufacturing costs increase
Solution Approach 1:
The patent implements universality by designing a single rectifier circuit that performs multiple functions through switching between boost and buck modes. The same circuit structure and power devices can handle different input voltage ranges by changing operational mode, eliminating the need for multiple dedicated circuits for different voltage ranges, thus reducing manufacturing complexity and cost while maintaining adaptability
Solution Approach 2:
The dynamic switching between operational modes allows a single circuit design to cover wide voltage ranges, reducing the need for multiple voltage-specific circuit designs. This simplifies the manufacturing process, reduces inventory complexity, and lowers overall manufacturing costs while maintaining the ability to adapt to various input voltages
3Device complexity
If conventional rectifier circuits are used, then the circuit structure is simple, but the DC output voltage fluctuates significantly with input voltage changes
Solution Approach 1:
The patent uses dynamic mode switching to maintain stable DC output voltage across different input voltage conditions. By switching between boost and buck modes based on input voltage detection, the circuit actively compensates for voltage variations, keeping the DC output stable without requiring complex voltage regulation stages, thus maintaining relatively simple circuit structure while improving voltage stability
Solution Approach 2:
The patent implements feedback through voltage detection circuits that monitor input voltage conditions and generate control signals to switch between operational modes. This feedback mechanism ensures the circuit responds to voltage changes and adjusts accordingly, maintaining stable DC output voltage while keeping the overall circuit structure relatively simple through intelligent control rather than complex hardware
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 reduces the fluctuation range of DC output voltage, allowing for smaller charger volumes, lower component withstand voltages, and reduced manufacturing costs, while maintaining consistent power supply to subsequent circuits.
Implementation Method 1
an adaptive rectifier configured to receive an AC input voltage in different ranges, and switch between a boost mode and a buck mode according to a range of the AC input voltage
Data Source
AI summary
An AC-DC conversion circuit can include an adaptive rectifier configured to receive an AC input voltage with different ranges, where operation states of the adaptive rectifier are adjusted according to a range of the AC input voltage, in order to decrease a fluctuation range of a DC output voltage of the adaptive rectifier.