Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2023 , Vol. 57 >Issue 7: 878 - 886

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2022.102

New Type Power System and the Integrated Energy

A High-Efficiency Modulation Method of Two-Stage Inverter with Low Voltage Input and High Voltage Output

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  • 1. College of Electrical and Information Engineering, Hunan Institute of Engineering, Xiangtan 411104, Hunan, China
    2. Institute of Electrical Technology and Material Engineering, CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou 412001, Hunan, China

Received date: 2022-04-06

  Revised date: 2022-05-17

  Accepted date: 2022-06-17

  Online published: 2022-08-26

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Abstract

Miniaturization, lightweight, and high power density are development trends of vehicle-mounted inverters. The existing vehicle mounted single-phase inverter with DC 110 V input voltage adopts two-stage independent modulation between Boost circuit and full bridge inverter circuit, which has the problems of low efficiency and low power density. To solve these problems, a two-stage cooperative modulation between Boost circuit and full-bridge inverter circuit is studied. According to the relationship between the absolute value of input voltage and output voltage, the Boost circuit and the full-bridge inverter operate with different modes in the proposed method, which optimizes the insulated gate bipolar transistor(IGBT) switching state and diode on-off state to reduce the loss of the inverter and improve the efficiency of the inverter. At the same time, the output harmonics of the full-bridge inverter circuit can be reduced to decrease the size of the filter and improve the power density of the inverter. A 2.75 kV·A prototype is designed and fabricated. Experiments are conducted to verify the correctness and feasibility of the proposed method.

Key words： low voltage input and high voltage output; inverter; two-stage cooperative modulation; power density

Cite this article

KUANG Yonghong, XIE Wei, TIAN Li, LIN Yuan, ZHOU Xifeng . A High-Efficiency Modulation Method of Two-Stage Inverter with Low Voltage Input and High Voltage Output[J]. Journal of Shanghai Jiaotong University, 2023 , 57(7) : 878 -886 . DOI: 10.16183/j.cnki.jsjtu.2022.102

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