A New Zero-Voltage Switching Three-Level Converter with Reduced Rectifier Voltage Stress

Kim, Keon-Woo; Lim, Cha-Yong; Kim, Dong-Kwan; Jang, Yu Jin; Moon, Gun-Woo

doi:10.23919/ipec.2018.8507902

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Although ZCS technique can significantly reduce the tail current of the IGBTs, the maximum switching frequency of the IGBTs limits the magnetic components and space-constrained design. The converters in [24][25][26][27][28][29][30] use two half bridges to form the TL structure. Although it can eliminate the circulating current, in the primary side auxiliary circuit is also added to limit the ringing of the In this paper, a novel TL DC/DC converter with wide ZVS range, reduced circulating current and low filter requirement is proposed.…”

Section: Introductionmentioning

confidence: 99%

A series-connected asymmetrical PWM half-bridge three-level converter with reduced circulating current

Zhang

Chen

Zhao

et al. 2022

IEICE Electron. Express

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A novel three-level (TL) converter topology is proposed in this paper. The primary side of the proposed converter consists of two asymmetric half-bridge inverters, which are connected in series. The rectifier stage is composed of two parallel full-bridge-rectifier (FBR) which use the same diodes as the common current path. The asymmetrical-PWM control is employed to regulate output voltage. Compared with the traditional TL converters, the circulating current can be significantly reduced. Moreover, all the switches can achieve ZVS performance with a small leakage inductor over wide load range. The parallel connection of the two FBR also helps to reduce the current ripple of the filter inductor, leading to high density switching converter design. In this paper, a laboratory prototype(480-600 Vdc input, 96Vdc/12A output) based on the proposed converter is built to validate the theoretical analysis.

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