Adaptive Converter Parameter Tables for LED Driver Harmonics
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Solution Overview
Problem
Existing LED driver converters have fixed parameter tables that are not adaptable to different load conditions, leading to suboptimal performance and harmonic distortion limitations.
Innovation Solution
The electrical device self-adapts its parameter table by calculating performance evaluation parameters such as Power Factor, Total Harmonic Distortion, and Harmonics, adjusting parameter values based on input parameters like power, voltage, and frequency, and updating the table to optimize performance across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed parameter value table is used in the converter, then the device structure remains simple, but the performance is suboptimal under different load conditions and harmonic distortion limits the operation range
Solution Approach 1:
The converter automatically adjusts parameter values by evaluating performance metrics (PF, THD, harmonics) and comparing them against threshold values, eliminating the need for manual parameter adjustment under different load conditions. The control device self-adapts by selecting optimized parameter values from a table based on real-time performance evaluation.
Solution Approach 2:
The system continuously monitors performance evaluation parameters (Power Factor, Total Harmonic Distortion, Harmonics) and uses this feedback to automatically adjust parameter values in the table. The control device compares measured values with threshold values and selects appropriate parameter values accordingly, creating a closed-loop adaptive system.
2Reliability
If manual adjustment of parameter values is performed under different load conditions, then optimal performance can be achieved, but the development time is significantly increased
Solution Approach 1:
The system pre-calculates and stores multiple sets of parameter values in a table, each corresponding to different load conditions and performance requirements. During operation, the control device simply needs to select the appropriate pre-prepared parameter set based on current conditions, avoiding time-consuming manual adjustments during development and testing.
Solution Approach 2:
The invention systematically varies parameter values (such as Ton-add intervals) across different entries in the parameter table to create optimized settings for various operating conditions. This structured parameter exploration during development allows the system to achieve optimal performance across all load conditions without repeated manual tuning.
3Adaptability or versatility
If the parameter table is fixed during development, then the device structure remains simple, but the operation range is limited due to poor harmonic performance
Solution Approach 1:
The parameter table transforms from a static fixed structure to a dynamic adaptive structure that can change based on real-time operating conditions. The control device dynamically selects parameter values from the table based on current load conditions and performance metrics, enabling the system to maintain optimal harmonic performance across a wide operation range.
Data Source
AI summary
A method and apparatus of adjusting parameter for an electrical device. The method of adjusting parameter for an electrical device, the electrical device comprising a converter, the method including: calculating a performance evaluation parameter of the electrical device, when the converter using a parameter value table for running; adjusting at least one parameter value in the parameter value table of the converter according to an input parameter so as obtain the optimized performance evaluation parameter of the electrical device and use the adjusted parameter value table corresponding to the optimized performance evaluation parameter for running. Therefore, the self adapting parameter in the table will be enable to find the best performance for different input and load conditions and better performance of Harmonics will not limit the operation range.