AC/DC-DC/DC Converter Control for Switching Loss Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing AC/DC-DC/DC converters face inefficiencies due to high switching and conduction losses, particularly under high-frequency and high-load conditions, with current solutions failing to optimize energy efficiency across varying input and output voltage ranges.
Innovation Solution
A method and apparatus for determining and controlling optimal operating parameters of AC/DC-DC/DC converters by adjusting switching frequency and monitoring power losses, storing empirical data for real-time optimization, and using networked databases for shared data to achieve optimal energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If switching frequency is increased to improve response speed, then response speed improves, but switching loss increases significantly
Solution Approach 1:
The patent applies parameter changes by treating switching frequency as a variable parameter rather than a fixed design value. The control method systematically varies switching frequency and measures the corresponding power loss to establish an optimization curve, enabling the system to select the frequency that provides the best balance between response speed and switching loss for each specific operating condition.
Solution Approach 2:
The patent implements feedback by continuously monitoring power loss and using this information to adjust switching frequency in real-time. When power loss increases due to excessive switching frequency, the feedback loop triggers parameter adjustment to reduce frequency, thereby reducing switching loss while maintaining adequate response speed through adaptive rather than static frequency selection.
Data Source
AI summary
A method for determining optimal operating parameters of a converter including an AC/DC module and a DC/DC module, where the AC/DC output voltage of the AC/DC module has a predetermined range includes: setting the output voltage to the minimum value of the range; causing the output voltage of the DC/DC module to reach a certain DC voltage by changing the switching frequency of the DC/DC module; calculating the power loss of the converter based on the input power and the output power; recording: an AC/DC output voltage, a DC output current, DC output voltage and switching frequency of the DC/DC module, and a power loss; increasing the AC/DC output voltage and repeatedly performing the power loss calculation until the AC/DC output voltage reaches the maximum value within the range; and comparing recorded losses and using the output voltage and switching frequency corresponding to the power loss with the minimum value.