Journal
IEEE TRANSACTIONS ON ENERGY CONVERSION
Volume 35, Issue 1, Pages 462-473Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TEC.2019.2947147
Keywords
Rectifiers; Voltage measurement; Voltage control; Switches; Capacitors; Inverters; Vienna rectifier (VR); multilevel rectifier; on-off control; time division multiplexing; average model; self-oscillating modulation
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This paper presents a modification of the Vienna rectifier (VR) to obtain more than three voltage levels at the DC line connection, while preserving the unity power factor at the AC grid side. The proposed unidirectional multilevel there-phase rectifier, called the Negev rectifier, has a reduced device count and utilizes a unique novel Time Division Multiplexed based control scheme, which makes the challenging N-level VR expansion possible. The Negev rectifier can serve as a grid interface for supplying dc voltage to multilevel inverters with 4 up to 7 voltage levels, eliminating the burden of inverter-side voltage balancing control. The Negev hardware can be constructed by two complementary topologies, making it suitable for either high current or high voltage applications.
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