ABSTRACT
Power electronic circuits can convert alternating current (ac) to direct current (dc). These are called
rectifier circuits. Power electronic circuits can also convert direct current to alternating current. These
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 rectifier transformer. IEC standards refer to these transformers as converter transform-
ers, while IEEE standards refer to these transformers as rectifier transformers. Because it is IEEE practice
to refer to these transformers as rectifier transformers, that same term is used throughout this
discussion.
