ABSTRACT
Power electronic circuits can convert alternating current (ac) to direct current (dc). ese are called recti–er circuits. Power electronic circuits can also convert dc to ac. ese are called inverter circuits. Both of these circuits are considered to be converters. A transformer that has one of its windings connected to one of these circuits, as a dedicated transformer, is a converter transformer, or recti–er transformer. IEC standards refer to these transformers as converter transformers, while IEEE standards refer to these transformers as recti–er transformers. Because it is IEEE practice to refer to these transformers as recti-–er transformers, that same term is used throughout this discussion.
