DC/DC Converter Control Apparatus for Stable Bidirectional Power Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DC/DC converters face challenges in maintaining stability and responsiveness while controlling output voltage across a wide range of input and target voltages, leading to increased storage requirements for gain maps, which in turn increase the size of storage media in digital control systems and mounting surface area in analogue control systems.
Innovation Solution
A control apparatus and method for a DC/DC converter that uses a power conversion circuit with a reactor and switching elements, along with voltage detectors, to calculate control calculation values based on differential voltage and input voltage, allowing for superior stability and responsiveness without the need for a large storage medium by normalizing gains across varying voltage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a gain map is prepared to maintain equal responsiveness across different voltage conditions, then control responsiveness is improved, but the size of the storage medium increases
Solution Approach 1:
The patent changes the control parameter from fixed gain values stored in a gain map to a variable gain calculation method. The gain is dynamically adjusted based on the input voltage value, allowing the system to adapt to different voltage conditions without storing multiple gain sets. This resolves the contradiction by maintaining responsiveness across voltage ranges while eliminating the need for large storage media.
2Manufacturing precision
If individual gain maps are stored for different voltage conditions, then control precision is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal control mechanism where a single gain calculation formula serves all voltage conditions. Instead of having separate gain maps for different voltage ranges, the system uses one multi-functional calculation that adapts to any input voltage, thereby maintaining control precision while reducing system complexity.
Solution Approach 2:
The patent extracts the essential relationship between input voltage and optimal gain, separating it from the complex gain map structure. By identifying and using only the critical parameter (input voltage) to determine gain, the system achieves precise control without the complexity of storing and managing multiple gain maps.
Data Source
AI summary
An object of this invention is to obtain a control apparatus and a control method for a DC/DC converter, with which a DC/DC converter can be controlled with superior stability and responsiveness while reducing the size of a storage medium. A calculation value is calculated in accordance with a specific control method using a differential voltage between a target output voltage and an output voltage, whereupon a control calculation value is calculated from the calculation value and an input voltage.