Abstract—The aim
of this study is to develop a high-efficiency single-input multiple-output
(SIMO) dc–dc converter. The proposed converter can boost the voltage of a
low-voltage input power source to a controllable high-voltage dc bus and
middle-voltage output terminals. The high-voltage dc bus can take as the main
power for a high-voltage dc load or the front terminal of a dc–ac inverter.
Moreover, middle-voltage output terminals can supply powers for individual
middle-voltage dc loads or for charging auxiliary power sources (e.g., battery
modules). In this study, a coupled-inductorbased dc–dc converter scheme
utilizes only one power switch with the properties of voltage clamping and soft
switching, and the corresponding device specifications are adequately designed.
As a result, the objectives of high-efficiency power conversion, high stepup
ratio, and various output voltages with different levels can be obtained. Some
experimental results via a kilowatt-level prototype are given to verify the
effectiveness of the proposed SIMO dc–dc converter in practical applications.
(Index Terms—Coupled inductor, high-efficiency power
conversion, single-input multiple-output (SIMO) converter, soft switching,
voltage clamping.)
