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- Title
基于逆变器交流侧的四开关功率解耦技术研究.
- Authors
章勇高; 付伟东; 刘鹏; 樊越
- Abstract
Large-capacity electrolytic capacitors are often used to buffer the inherent double frequency pulsation power of two-stage single-phase inverters, which greatly reduces their durability and reliability. In this paper, a four-switch power decoupling circuit is proposed to solve the problem by ensuring the stable operation of the converter, which has practical engineering significance for reducing the total capacitance of the inverter. The principle of decoupling circuit was analyzed and discussed, through the analysis of four different working modes, so as to determine the switching time sequence of each switch tube of decoupling main circuit. Therefore, a corresponding pulse energy modulation strategy was designed to achieve precise compensation of the transient energy, which improves the decoupling performance of the converter and waveforms quality in both the AC-side and DC-side. The inverter circuit and power decoupling circuit are independent of each other, which is conducive to the transformation of traditional equipment. Finally, a simulation model and experimental prototype were built. It is verified in the simulation and experimental results that the converter can effectively absorb the pulsating power with thin film capacitors of dozens of microfarads when four-switch power decoupling circuit operates.
- Subjects
PULSE modulation; ELECTROLYTIC capacitors; THIN films; SECOND harmonic generation; AC DC transformers; ELECTRIC capacity
- Publication
Electric Machines & Control / Dianji Yu Kongzhi Xuebao, 2023, Vol 27, Issue 8, p142
- ISSN
1007-449X
- Publication type
Article
- DOI
10.15938/j.emc.2023.08.015