DC-DC Converter Voltage Equalization via Controller Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In DC-DC conversion systems, voltage disequilibrium among power conversion modules leads to reduced performance and operation reliability, as it affects component selection and thermal design, necessitating effective voltage equalization methods.
Innovation Solution
A DC-DC conversion system with multiple power conversion modules, output and input sensors, and a controller that detects output and input voltage signals to generate modulation signals for switches, ensuring voltage equalization through a control method that compensates control signals when they exceed tolerance ranges, thereby stabilizing the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage equalization is implemented through additional hardware circuits, then voltage equalization precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces hardware-based voltage equalization circuits with a software/control-based solution. The controller detects voltage values of each power conversion module and dynamically adjusts control signals to achieve voltage equalization, eliminating the need for additional hardware equalization circuits and reducing system complexity while maintaining equalization precision
Solution Approach 2:
The patent introduces a voltage detection and control signal adjustment mechanism as an intermediary between the power conversion modules and the controller. This intermediary detects voltage discrepancies and translates them into appropriate control adjustments, enabling precise voltage equalization through software control rather than hardware circuits
2Power
If multiple power conversion modules are connected in series to increase output voltage, then power conversion capability is improved, but voltage disequilibrium among modules increases
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously detects the voltage values of each power conversion module connected in series and dynamically adjusts the control signals for each module based on the detected voltage discrepancies. This closed-loop feedback ensures that voltage equalization is maintained throughout operation, stabilizing the system composition even as power conversion capability increases through series connection of multiple modules
3Reliability
If component selection and thermal design are optimized for voltage equalization, then operation reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent enables the DC-DC conversion system to automatically self-regulate voltage equalization through the controller's detection and adjustment mechanisms. The system monitors its own voltage distribution across modules and autonomously makes control adjustments, eliminating the need for complex manual component selection and thermal design optimizations, thereby improving reliability while simplifying manufacturing
Data Source
AI summary
A method for controlling a DC-DC conversion system having power conversion modules, input sensors, an output sensor and a controller, in which each of the power conversion modules has one or more conversion units. The output sensor detects an output signal of the DC-DC conversion system. The input sensors detect input voltage signals located at series-connected first sides of one or more conversion units respectively. The controller receives the output signal and the input voltage signals. The controller generates a first control signal according to the output signal and an output reference signal. The controller generates second control signals according to the input voltage signals and input reference voltage signals. The controller outputs a modulation signal corresponding to a corresponding one of the second control signals according to the first control signal and the corresponding second control signal, to control switches of a corresponding conversion unit.