COMPOSITE TRANSFORMER WITH SELF-CONTROL OF VOLTAGE UNDER LOAD Russian patent published in 2011 - IPC H01F29/04 

FIELD: electricity.

SUBSTANCE: transformer comprises two parts, the main (1) one and the additional (2) one arranged on a separate triple-rod core with six windings, three primary and three secondary ones, connected in series and in a cophased manner with according windings of the main part. The additional part has a high turn transformation ratio compared to the main part. Capacitors (3) are serially connected in a circuit of its primary windings. The additional part is arranged on a transformer core, which is 10 times less than the main part. Windings of the additional part have 10-16% of turns quantity compared to the appropriate windings of the main part. Smooth contactless self-control of voltage under load is executed without an extraneous effect at the transformer operation and does not required additional automatics or a person's attendance. In an idle run mode there is a rated voltage available at the outlet of the composite transformer, which gradually increases while the load increases. Control may be voltage stabilisation. The additional part dimensions are determined by a selected value of the voltage growth. The additional part may be added to a transformer in operation.

EFFECT: provision of smooth contactless self-control of voltage under load.

3 cl, 3 dwg