Boost PFC變換器的動態(tài)斜坡補(bǔ)償策略分析與設(shè)計
[Abstract]:The traditional slope compensation method can effectively suppress the peak current mode and control the Boost power factor to correct the instability of subharmonic oscillation in the (PFC) converter system, but at the same time, it will cause the dead time problem at the zero crossing of the current. Therefore, the controlled average current distortion and the deterioration of power factor are caused. In this paper, a new idea of dynamic slope compensation control is proposed, which can effectively improve the current distortion of slope compensation and ensure the suppression of subharmonic oscillation. Based on the quasi steady state relation of the input and output of the system, the control equation of the dynamic slope compensation is derived, and the corresponding circuit is simple and feasible. Furthermore, the harmonic distortion characteristics of the controlled average current are analyzed, the harmonic decomposition results of the average input current under the slope compensation and the proposed dynamic slope compensation are given, and the improved compensation effect of the proposed control is explained theoretically. The simulation results are in good agreement with the theoretical results. The experimental results confirm the feasibility of the proposed dynamic slope compensation control and the correctness of the theoretical analysis results.
【作者單位】: 重慶大學(xué)輸配電裝備及系統(tǒng)安全與新技術(shù)國家重點(diǎn)實驗室;
【基金】:國家自然科學(xué)基金資助項目(51377185)~~
【分類號】:TM46
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