无输出变压器型UPS技术的研究（下）

Research on No Output Transformer-based UPS Technology （3）

随着功率半导体器件的发展与进步，UPS经历了由多个输出工频变压器到单个输出工频变压器的演变过程，UPS在高频化、小型化、节能化和环保化等方面取得了长足的进步。IGBT升压整流和无输出变压器的高频机型集中体现了UPS电路技术的进步，代表着UPS技术的发展方向。

With the development and progress of power semiconductors, current UPS consists of only one industrial frequency transformer instead of several ones. UPS has made a great progress in miniaturization, energy cdnservation and environmental protection. IGBT boost rectifying technology and no output transformer-based UPS technology represent the huge advancement in UPS and they also lead the development trend of UPS technologies.