PFC Converter with Output – Based Feedback Adjustment for Reduced Output Disturbance During Step Load

I. L. Ardiente, Jesus M. Martinez
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Abstract

Several methods used for improving the transient response of a PFC converter involves modification of its inherent control loop. This study proposed an output-based method for the reduction of output disturbance during step loading, an approach that is independent from its inherent control. Through SIMPLIS simulation, the PFC converter was modelled first, then its compensator was designed to meet the stability requirement, and lastly, the proposed method was designed and modelled with its two main blocks, the load detection block, and the feedback voltage manipulation block. Through simulation results, the output undershoot is reduced by about 12.15% at worst input condition (180VAC) and during 10%-100% step load disturbance. Also, the output overshoot is reduced by about 7.92% at worst input condition (180VAC) and during 100% to 10% step load disturbance. The proposed method is also tested at several input conditions and output disturbances.
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基于输出反馈调节的PFC变换器在阶跃负载时减少输出干扰
改善PFC变换器瞬态响应的几种方法涉及对其固有控制回路的修改。本研究提出了一种基于输出的方法来减少阶跃加载过程中的输出干扰,这种方法独立于其固有控制。通过SIMPLIS仿真,首先对PFC变换器进行了建模,然后设计了满足稳定性要求的补偿器,最后对该方法进行了设计和建模,包括负载检测模块和反馈电压处理模块两个主要模块。仿真结果表明,在最坏输入条件(180VAC)和10% ~ 100%阶跃负载扰动下,输出欠冲减小约12.15%。此外,在最坏输入条件(180VAC)和100%至10%阶跃负载扰动下,输出超调量减少约7.92%。在多种输入条件和输出干扰下对该方法进行了测试。
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