text: They’re not converters, but the buck-boost variety of these devices are sometimes used in specialty appliances.
full_question: They’re not converters, but the buck-boost variety of these devices are sometimes used in specialty appliances. Shapes of these devices include the E-I variety and the cut-core or double half-C variety. Inefficiency within these devices can be caused by leakage inductance. The voltage ratio within these devices is proportional to N, the number of turns in the winding of their coils. For 10 points, name these devices that transfer energy between two AC circuits and which can “step up” or “step down” an input voltage.
first_sentence: They’re not converters, but the buck-boost variety of these devices are sometimes used in specialty appliances.