Abstract
An input-parallel, output-series dc–dc Boost converter with a wide input voltage range is proposed in this paper. An interleaved structure is adopted in the input side of this converter to reduce input current ripple. Two capacitors are connected in series on the output side to achieve a high voltage gain. The operating principles and steady-state characteristics of the converter are presented and analyzed in this paper. A 400 V/1.6 kW prototype has been created which demonstrates that a wide range of voltage gain can be achieved by this converter and it is shown that the maximum efficiency of the converter is 96.62% and minimum efficiency is 94.14%. The experimental results validate the feasibility of the proposed topology and its suitability for fuel cell vehicles.
Highlights
Traditional fossil fuel resources are depleting quickly, but their continued use contributes to increasing pollution [1]-[3]
Interleaved boost converters with coupled inductors discussed in [20] have advantages of high voltage-gain and low input current ripple
DC-DC Boost converter topology can be formed by inductor L1, power switch Q1, diode D1 and capacitor C2
Summary
Traditional fossil fuel resources are depleting quickly, but their continued use contributes to increasing pollution [1]-[3]. The conventional interleaved Boost DC-DC converter can obtain low input current ripple, but this converter still has certain disadvantages including limited voltage-gain and high voltage stress for power semiconductors. The converter with coupled inductors in [19] can obtain a high voltage-gain and low voltage stress for power semiconductors, but it suffers high ripple of input current. Interleaved boost converters with coupled inductors discussed in [20] have advantages of high voltage-gain and low input current ripple These converters have high voltage stress for power semiconductors. Stacked high step-up coupled-inductor boost converters discussed in [21] can obtained a very high voltage-gain and low voltage stress for power semiconductors, but the input current ripple of these converters are higher.
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