在线式 UPS 的结构主要由将输入交流电经整流滤波后转换为直流电的整流器和将直流电转换成交流电输出的逆变器所组成,而逆变器采用何种器件直接关系到 UPS 的输出性能。进入九十年代,随着 IGBT 制造工艺的日益完善及性能提高,大多数 UPS 厂家均选择 IGBT 作为逆变器的功率器件。 The structure of on-line UPS is mainly composed of a rectifier that converts an input AC power to a direct current through a rectifier filter and an inverter that converts a direct current into an alternating current output, and what type of inverter is directly related to the output performance of the UPS. Into the nineties, with the increasingly sophisticated IGBT manufacturing process and performance improvement, most UPS manufacturers have chosen IGBT as the inverter power devices.