AUTOMATIC VOLTAGE REGULATOR AND TOROIDAL TRANSFORMER

摘要

The present invention relates to an automatic voltage regulator and a toroidal transformer, particularly to an automatic voltage regulator capable of precisely controlling the output voltage level, and a toroidal transformer used for the same. The present invention relates to an automatic voltage regulator for converting an input voltage applied to an input terminal and outputting the converted input voltage to an output terminal, comprising: a main winding having one end thereof connected to the input terminal and the other end thereof connected to the output terminal; a primary field winding excited in the main winding; a first switch unit for selectively connecting one end of the primary field winding to either a reference potential or the output terminal; a plurality of secondary field windings excited in the main winding; a second switch unit for selectively switching so that the plurality of secondary field windings are selectively connected to the primary field winding serially, and that one or more of the plurality of secondary field windings are serially connected to each other to be serially connected to the other end of the primary field winding when the one or more of the plurality of secondary field windings are connected to the other end of the primary field winding; a third switch unit for selectively connecting an end of a serial connection generated by selectively connecting the primary field winding and the secondary field windings to either the reference potential or the input terminal; and a control unit which regulates the level of an output voltage output to the output terminal by switching control of the first switch unit, the second switch unit, and the third switch unit, The present invention provides precise voltage control to enable the output of a voltage level desired by a user, and precisely carries out a variety of applications for power saving and as voltage booster. In particular, the present invention makes it possible to change the input voltage to the size of voltage corresponding to one turn. The present invention also comprises a simple relay switching circuit and excludes semiconductor switching devices, thereby being capable of operating adaptively in different system environments without an additional modification.