Abstract
The boost type dc-dc converter is used for compensation of dc bus voltage in the dc power feeding system such as the renewable energy system. It should be operated stably to improve reliability of the system. The peak current mode control is applied to operate stably because the boost type dc-dc converter tends to be unstable. However, a peak value of reactor current cannot be captured in the digital controller. In this paper, a digital peak current mode control boost converter with conversion from current to frequency and using a frequency detector for a peak current detection in real time is presented. The effectiveness of the proposed method is verified by the comparison of the transient response under changing an input voltage between the conventional PID control and the proposed method.
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