Features of physical processes in Transformer-Rectifier Devices with a Multichannel Conversion Path

Abstract

The article considers a new solution for two types of transformer-rectifier devices (TRD-M) which implement the resource saving principle of multichannel conversion of an energy flow. An increased level of converted power and simultaneous improvement of electromagnetic and electric power efficiency indicators are achieved by increasing the number M of conversion channels. The analysis is confined to consideration of the class of TRD-M involving addition of channel currents. In some applications, their conventional (modern) solutions do not ensure uniform distribution of currents among the channels. The idea of synthesizing new TRD-M solutions is that the currents in M channels are forcedly equalized using one of two methods: by using current transformers in the channels of the same phase (in using one common voltage transformer; by means of series phase-wise connection of the primary windings of M transformers (in using M transformers with M times smaller capacity). In both cases, M rectifier bridges are connected in parallel. The new TRD-M are characterized by nonconventional (complex) physical processes. This adds difficulty to making their model description and design procedure on this basis, and, second, it becomes impossible to carry out a comparative assessment of alternative versions with a view to make a sound choice of the most rational solution in the case of using them. The aim of the study is so solve the problems formulated above (in the first version, subject to the adopted assumptions). Simulation on a computer is used as the solution tool. The obtained results made it possible to develop information and methodical support for fulfilling this procedure in the minimal scope necessary for designing. The results are presented in the form of working process oscillograms, tables and models showing interrelation between the rectified voltage DC component and network voltage.