AC/DC Power Converter Efficiency via Dynamic Trim Voltage Control
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Solution Overview
Problem
Existing AC/DC power conversion systems do not optimize overall power efficiency and fail to dynamically adjust to varying load requirements, leading to inefficiencies due to unoptimized operating set points and component losses.
Innovation Solution
A staged series of DC/DC converters with a controller that monitors power efficiency and adjusts output voltages to minimize conduction and switching losses, using sensors to collect data and trim voltage providers to optimize the system's operating set points, ensuring maximum power efficiency and safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a boost converter is used for power factor correction to increase real power delivery, then power factor is improved, but overall power efficiency is not optimized due to unaddressed system architecture and component losses
Solution Approach 1:
The system implements a feedback mechanism where the controller continuously monitors the actual power efficiency of the DC/DC converter and adjusts the operating set point dynamically. The controller receives feedback about efficiency performance and modifies the operating parameters to maximize efficiency while maintaining power factor correction functionality.
Solution Approach 2:
The operating set point of the DC/DC converter is made dynamic rather than fixed. The controller adjusts the operating set point in real-time based on actual efficiency performance and system conditions, allowing the system to adapt to varying load conditions and optimize efficiency continuously.
2Device complexity
If operating set points are fixed to simplify control, then device complexity is reduced, but power efficiency cannot be optimized for varying load conditions
Solution Approach 1:
The system performs self-optimization through automated feedback control. The controller automatically monitors efficiency and adjusts operating parameters without requiring complex manual intervention or pre-programming for every scenario. The system serves itself by continuously adapting to optimize performance.
Solution Approach 2:
The system replaces complex mechanical or manual adjustment mechanisms with electronic feedback control. Instead of physical adjustments or complex control circuits, the system uses digital monitoring and electronic parameter adjustment to achieve optimization.
Data Source
AI summary
A system and method for closed-loop efficiency modulation for an AC/DC power system is provided. A boost-buck converter and a DC/DC converter connected in series receive a rectified DC feed signal from a AC input signal and deliver a modified DC output to an active load. A controller receives power data at various stages of the system and uses that data to modify a series of trim voltages provided to the feedback inputs of the respective converters to modify each converters output voltage. The controller modifies each converter's output voltage to maximize power efficiency while monitoring other data in the system to ensure the system is operating correctly and safely.