Z-Source Topology for the Entire Circuit Spectrum of Power Conversion

当今的功率转换电路基于两种传统拓扑结构：电压源和电流源，一种支持所有现有功率转换电路的“两条腿”结构。 传统的电压源（V源）和电流源（I源）转换器具有其理论上的局限性，这阻碍了许多应用的经济和有效的解决方案。 例如，V源逆变器是不能产生大于源电压的输出电压的降压转换器。 这种限制通常需要额外的DC-DC升压转换器用于许多应用，如电池，光伏和燃料电池，这使得功率转换具有更低的效率，更大的尺寸和更高的成本。在本计画中，我们研究一种新型的电源转换电路-阻抗源Z源功率变换器是两年前提出的一种新型功率变换器，旨在克服传统V源和I源变换器的问题，本研究旨在将Z源拓扑扩展并应用于整个电路频谱（类别）电力电子学，包括直流到交流，交流到直流，交流到交流，和直流到直流功率转换和发展他们的控制理论。 随着Z源概念成功地扩展和应用到所有电力转换类别，将建立“第三条腿”。 这“第三条腿”将改变整个电力电子电路的频谱，并提供第三种选择，以优化性能，最大限度地提高效率，并最大限度地降低成本和尺寸。

Today's power conversion circuits are based on the two conventional topologies: voltage-source and current-source, a "two-leg" structure supporting all existing power conversion circuits. The conventional voltage-source (V-source) and current-source (I-source) converters have their theoretical limitations that prevent economical and efficient solutions to many applications. For example, the V-source inverter is a buck converter that cannot produce an output voltage greater than the source voltage. This limitation often requires an additional dc-dc boost converter for many applications such as batteries, photovoltaic, and fuel cells, which makes the power conversion have much lower efficiency, larger size, and higher cost. In this project, we investigate a new type of power conversion circuits, an impedance-source (Z-source) power converter that was proposed two years ago with the intent to overcome the problems associated with the conventional V- and I-source converters.This research project is to extend and apply the Z-source topology to the entire circuit spectrum (categories) of power electronics, including dc-to-ac, ac-to-dc, ac-to-ac, and dc-to-dc power conversion and to develop their control theory. With the successful extension and application of the Z-source concept to all power conversion categories, a "third leg" will be established. This "third leg" will change the entire spectrum of power electronics circuits and provide a third option to optimize performance, maximize efficiency, and minimize cost and size.