Autotransformer, autotransformer-rectifier unit and method for connecting electrical device to three-phase power grid by means of autotransformer-rectifier unit

The invention relates to a three-phase autotransformer (8) comprising three sets of outputs and three inputs (E1, E2, E3), each input being connected to each output of a respective set of outputs by a coil configured such that, when a respective input voltage is applied to each input, the three input voltages have the same input amplitude, and when the respective input voltage is applied to each input, the three input voltages have the same input amplitude. For each output terminal group, the amplitude of the main output voltage obtained between the main output terminal of the output terminal group and the neutral point is greater than the input amplitude; and moreover, the output voltages of the autotransformers belong to the same Ru polygon, and the voltage of each output end is associated with the corresponding output end and is equal to the voltage between the output end and the neutral point. 本发明涉及一种三相自耦变压器(8)，包括三个输出端组和三个输入端(E1、E2、E3)，每个输入端通过线圈连接到相应的输出端组的每个输出端，所述线圈被配置为，当每个输入都施加了相应的输入电压时，三个输入电压具有相同的输入振幅，彼