过去几年里,中小功率的UPS电源设计已经越来越多的采用无变压器电路原理,这不仅使得成本进一步优化,而且将给制造技术带来全新的面貌。随着UPS电源向高功率领域扩展,这一电路原理还不能完全的适用,还需要增添新的原理。本文介绍了关于这一新的电路原理及其控制结构,它使无变压器UPS电源的新潜力得以发挥。文章给出了这一技术的基本层面,并展示了一系列高功率UPS电源的新的研究成果。 Over the past few years, small and medium-power UPS power supply design has been more and more use of transformerless circuit theory, which not only makes the cost further optimization, but also to bring a whole new look to the manufacturing technology. With the UPS power to the field of high-power expansion, the circuit principle can not be fully applied, but also need to add new principles. This article describes the new circuit theory and control architecture for this new transformerless UPS power supply. The article gives the basic dimensions of this technology and shows a series of new research results for high power UPS power supplies.