A Single-Phase Utility-Interface Circuit without any AC Inductor nor EMI Filter
A Single-Phase Utility-Interface Circuit without any AC Inductor nor EMI Filter
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一种没有任何交流电感器和 EMI 滤波器的单相市电接口电路
DOI：
10.1109/08ias.2008.325
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
H. Fujita
中科院分区：
文献类型：
--
作者：
H. Fujita
本文提出了一种不带交流电感和电磁干扰滤波器的单相公用接口电路，以消除开关电压/电流纹波和电磁噪声。该电路的主电路由二极管箝位线性放大器（DCLA）和电压平衡电路组成。除了使用附加的mosfet作为功率器件外，DCLA具有与二极管箝位多级逆变器相似的电路配置。因此，DCLA可以在没有任何交流滤波器的情况下产生正弦输出电压。提出了DCLA与电网连接时输出电压和电流的控制新方法。实验结果表明，功率转换效率高达93%，电流THD小于2%。
This paper proposes a single-phase utility-interface circuit without any ac inductor nor EMI filter to eliminate switching voltage/current ripples and electro-magnetic noises. The main circuit of the proposed circuit consists of a diode-clamped linear amplifier (DCLA) and a voltage balancing circuit. The DCLA has a circuit configuration similar with a diode- clamped multi-level inverter, except for using complimentary MOSFETs as the power devices. As a result, the DCLA makes it possible to generate a sinusoidal output voltage without any ac filter. This paper presents new control methods of the output voltage and current to connect the DCLA with the utility grid. The experimental results show a power conversion efficiency as high as 93% and a current THD less than 2%.