An Improved Split Δ-source Inverter without Voltage Spikes

doi:10.11985/2024.01.025

Abstract

Abstract:

Aiming at the problems of the Δ-source inverter(DSI) of large voltage spike of the switch and poor output power quality under high gain, a voltage clamping cell is added on the basis of the split Δ-source inverter(SDSI), and an improved split Δ-source inverter(ISDSI) is proposed. The topological structure and working state of the inverter are studied, the steady-state voltage boosting characteristics and the process of eliminating voltage spikes are analyzed, and the voltage stress of each switching device is calculated. The proposed topology retains the advantages of SDSI boost duty ratio and modulation factor adjustment in the same direction, which helps to improve the output power quality at high voltage gain. The results of Matlab/Simulink software simulation and prototype experiment verify the performance of the converter, and prove the proposed inverter can effectively solve the outstanding problems existing in Δ-source inverter.

Key words: Inverter, voltage spike, high voltage gain, voltage-clamp cell

CLC Number:

TM464

FANG Xupeng, SUN Xiangfei, ZHANG Shengnan, ZHAO Bingbing. An Improved Split Δ-source Inverter without Voltage Spikes[J]. Journal of Electrical Engineering, 2024, 19(1): 235-242.

Figures/Tables 11

References 20

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名称	改进型分裂Δ源逆变器	分裂Δ源逆变器	Δ源逆变器
电压增益B	$1+\frac{\frac{{{N}_{2}}}{{{N}_{3}}}}{1-D}$	$\frac{1+\frac{{{N}_{1}}}{{{N}_{3}}}}{1-D}$	$\frac{1}{1-\frac{{{N}_{1}}}{{{N}_{3}}}D}$
电容电感数目	1个三绕组耦合电感 2个电容	1个三绕组耦合电感 1个电容	1个三绕组耦合电感 1个电容
开关和二极管数目	6个开关管 5个二极管	6个开关管 4个二极管	6个开关管 1个二极管
绕组间的关系	N₂=N₁+N₃ (N₂>N₁>N₃)	N₂=N₁+N₃ (N₂>N₁>N₃)	N₁=N₂+N₃ (N₁>N₂>N₃)
开关管最大电压	${{V}_{\text{C}}}$	${{V}_{\text{C}}}$	$\frac{{{N}_{1}}}{{{N}_{2}}}{{V}_{\text{C}}}-\frac{{{N}_{3}}}{{{N}_{2}}}{{V}_{\text{in}}}$.
二极管最大电压	${{V}_{\text{C}}}$	${{V}_{\text{C}}}+\frac{{{N}_{2}}-{{N}_{3}}}{{{N}_{3}}}{{V}_{\text{in}}}$	$\frac{{{N}_{1}}}{{{N}_{3}}}{{V}_{\text{C}}}-{{V}_{\text{in}}}$

参数	数值
输入电压V_in/V	24
开关频率f/kHz	10
调制系数M	0.6
耦合电感匝数比电容C、C₁/μF 滤波电容C_f/μF 滤波电感L_f/mH 负载电阻R/Ω	20∶30∶10 470，3.3 22 1 100