该文提出一种非隔离型三相电流型Sepic逆变器,该逆变器的结构主要通过传统的三相桥式电路以及可升降压模块的Sepic电路组合而成。借助SPWM载波幅值可调策略解决对于电流型逆变器直流侧电感较大的问题,同时优化输出波形质量。首先介绍此三相电流型Sepic逆变器的工作原理以及相应的调制方式,并在此基础上给出此电路的电压增益数学公式推导,进行相应的数学建模,并由此确定了闭环控制策略。通过仿真验证此电路的升降压能力,最后通过TMS320F2812与FPGA搭建数字控制平台进行实验验证,验证此电路的可行性。
Abstract
This paper proposes a novel three-phase current source SEPIC inverter, which is composed of traditional three-phase bridge circuit and SEPIC circuit. The inverter can achieve buck-boost comply with the characteristics of SEPIC circuit. Meanwhile, by means of the SPWM carrier amplitude adjustable strategy, the problem which traditional current source inverter has large inductance parameter in DC side is solved, and the output waveform quality is optimized. This paper first introduces the working mode and the corresponding modulation method of the inverter, afterwards gives the mathematical formula of the voltage gain. Moreover, based on the characteristics of the circuit, the corresponding mathematical model and the closed-loop control strategy is established. Finally, the corresponding digital control platform is built by TMS320F2812 and FPGA, and the corresponding experimental verification is carried out, which verifies the feasibility of the circuit.
关键词
电流型逆变器 /
Sepic /
可升降压 /
载波幅值可调
Key words
current source inverter /
Sepic /
Buck-Boost /
carrier amplitude adjustable
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基金
国家自然科学基金（51677162）; 河北省自然科学基金（E2017203235）
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