Open AccessSeven‐level cascade inverter with asymmetrical DC voltages
Author(s) -
Wu KuenDer,
Jou HurngLiahng,
Wu JinnChang,
Su JyunYi
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0293
Subject(s) - cascade , transformer , inverter , electrical engineering , voltage , grid tie inverter , power (physics) , charge pump , electronic engineering , computer science , engineering , maximum power point tracking , capacitor , physics , chemical engineering , quantum mechanics
This study proposes a novel seven‐level cascade inverter (SLCI) with asymmetrical DC voltages. The proposed SLCI consists of two full‐bridge inverters, a DC–DC converter (DDC) and a DC power source. The DC power source is parallel connected to the high‐voltage full‐bridge inverter (HVFB). The DDC is used to create a DC voltage with half of the DC power source and connect to the low‐voltage full‐bridge inverter (LVFB). The HVFB is switching at low frequency, and the LVFB is switching at high frequency. The salient points of the proposed SLCI are that only one DC power source is required and no transformer is used. Therefore, the power circuit for the proposed SLCI is simplified. A hardware prototype is established in order to verify the functions of the proposed SLCI. The tested results show that the functions of the proposed SLCI are as expected.