Adaptive Efficiency Optimization for the High-Step-Up Boost Converter Based on the Loss Analysis Model

Conference: PCIM Asia 2024 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
08/28/2024 - 08/30/2024 at Shenzhen, China

doi:10.30420/566414034

Proceedings: PCIM Asia 2024

Pages: 8Language: englishTyp: PDF

Authors:
Qin, Yuxiao; Zhao, Lei

Abstract:
In this paper, an adaptive-step-size frequency optimization algorithm (ASSFO) is used for tracking the maximum efficiency point of the high-step-up boost converter under variable conditions. Based on the analysis of losses of the converter, the desired switching frequency is selected depend upon input current value. The ASSFO function results in improved adaptive controller convergence speed, convergences error and stability. This algorithm is implemented in a prototype where converter continuously maintains the optimal switching frequency under varying load current. A 1-kW prototype is implemented to verify the proposed controller performance and proposed algo-rithm is verified successfully.