数字控制系统应用于PFC升压变换器工作在混合导通模式

L. Roggia, F. Beltrame, J. E. Baggio, J. R. Pinheiro
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引用次数: 29

摘要

本文提出了一种适用于功率因数校正升压变换器的数字控制系统,该变换器的额定输出功率范围很大,工作在固定开关频率的混合导通模式下。该控制系统由输入电流控制器和输出电压控制器组成。电流控制器包括两个基于预测模型的控制律(一个用于连续导通模式,另一个用于不连续导通模式)和一个运行模式选择算法,该算法负责检测运行模式并选择合适的控制律。输出电压由比例积分电压控制器调节。仿真和实验结果表明,采用低成本单片机控制的控制系统能够正常运行。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Digital control system applied to a PFC boost converter operating in mixed conduction mode
This paper proposes a digital control system applied to a power factor correction boost converter rated to a wide range of output power, operating in mixed conduction mode with fixed switching frequency. The control system is composed of an input current controller and an output voltage controller. The current controller comprises two predictive model-based control laws (one for the continuous conduction mode and another for the discontinuous conduction mode) and an operation mode selection algorithm, which is responsible for detecting the operation mode and selecting the appropriate control law. The output voltage is regulated using a proportional-integral voltage controller. Simulation and experimental results applying a low cost microcontroller are shown to ensure the operation of the proposed control system.
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