Overview

Power electronics is the branch of electrical engineering related to the use of semiconductor devices to convert power from the available source to the load requirement. The dynamic response problems are occurring in Alternative Current (AC) - Direct Current (DC) converters. Due to input power variation in Power Factor Correction (PFC) converters, output load voltage contains a ripple voltage, whose frequency is twice the line frequency, which affects the input current waveform unless the voltage loop bandwidth is held below the half of the line frequency. This low bandwidth in voltage loop makes the active PFC converters to have sluggish transient response. This sluggish transient response problem is further compounded by large voltage overshoots and voltage drops enforcing additional stress on the PFC components, as well as on its downstream switch mode power supply load. The simple way of obtaining good transient response is possible only by sacrificing the efficiency of the overall system by cascading the PFC preregulator with second DC-DC converter.

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9783861112099

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