A compact single-phase adjustable-voltage-ratio magnetoelectric transformer

Adjustable-voltage-ratio (AVR) magnetoelectric transformer is a new type of power transformer whose voltage ratio between the output and input can be adjusted continuously from the minimum value (e.g., zero) to the maximum value designed. Therefore, given an input voltage with fixed amplitude, the AVR transformer can output one or multiple AC voltages with continuously adjustable amplitudes from zero volts to the maximum value. In this paper, a new structure-compact singlephase AVR transformer is proposed. The configuration and working principle of the proposed AVR transformer are presented. Finite element analysis (FEA)-based simulation analysis and preliminary experimental results are provided to demonstrate the proposed novel transformer concept.