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A new method is described in which the dc motor may regenerate power effectively to ac supply. The principle is similar to that with a dc chopper for regeneration of the power from dc motor to dc supply. In this new method, however, thyristor switches synchronizing to the ac supply are used instead of a dc chopper. The principle and the power calculations as well as experimental results are presented. From theoretical and experimental considerations it is clarified that there exist suitable trigger angles in the thyristor of the synchronizing switches.
Date of Publication: Jan. 1974