Circuitry for regulating and/or controlling alternating current (AC) voltage in AC power supply networks, has switching elements that are provided to connect secondary side of control transformer to primary side of control transformer

摘要

The circuitry has a control transformer that is defined as a full galvanic isolation transformer which is adapted to control AC voltage applied between a primary side (T1) and a secondary side (T2). The primary side is arranged in parallel with respect to the AC voltage supplied from the secondary side of the control transformer. The transmission ratio of the control transformer is greater than 100%. Multiple switching elements (S1,S11,S12,S21,S22) are provided to connect the secondary side of the control transformer to the primary side of the control transformer.