一种18脉冲隔离型变压整流器

多脉冲隔离型变压整流器因其具有结构简单、可靠性高、输入输出电气隔离、输入电流谐波小并可通过匝比变换实现自由变压变流等优势,在工业及航空领域有着广泛的应用。本文在传统的18脉冲自耦型变压整流器的基础上采用加原边三角形绕组的方式来构造18脉冲不对称式隔离型变压整流器,对其工作原理、输入电流特性和输出电压特性进行了详细的理论分析,并通过对变压器建立等效模型,着重讨论了变压器绕组等效电阻及交流侧漏感对输出电压外特性的影响,为进一步优化变压器设计提供了依据。在原理分析的基础上研制了1kW实验样机和200kW工程样机,并通过实验验证了理论分析的正确性。

P Type 18-Pulse Isolation Transformer Rectifier

Because of simple structure, high reliability, electrical isolation between input and output, low total harmonic distortion of the input current content and the function of adjusting output voltage freely through changing the turn ratio, multi-pulse isolation transformer rectifier is widely used in the field of industry and aviation. This paper constructs the 18-pulse asymmetrical isolation transformer rectifier by the way of adding a triangle winding as primary side based on the traditional 18-pulse auto-transformer rectifier units(ATRU). The operation principle of the rectifier is analyzed as well as the output voltage and the total harmonic distortion of the input current. And through an equivalent model of the transformer, the impact of the external characteristics of output voltage by the equivalent resistance of the transformer winding and the AC side leakage inductance is discussed, thus providing the basis to further optimize the transformer design. Finally, 1 kW and 200 kW 18-pulse transformer rectifiers are fulfilled, and the results are compared.