Power conversion efficiency and resistance tunability in coil-magnetoelectric gyrators

The power efficiency andresistance tunability of magnetoelectric (ME) gyrators consisting of two-phase magnetostrictive-piezoelectric ME longitudinal-transverse (L-T) mode sandwichlaminates andcoils, have been studied. The copper wirecoil provided an inductance-basedcoil port (CoilP) and the piezoelectric layer of the MElaminate provided a capacitance-based ME port (MEP). The device behaved as a 2-port 4-wire ME gyrator. The current-to-voltage and voltage-to-current (I-V andV-I, respectively) conversion ratios,resistance-inductance/capacitance tunabilities (TR-L andTR-C, respectively) and direct/converse power efficiencies (PED andPEC, respectively) were measured. Maximum values of 1454  V/A and 0.468 mA/V for theI-V andV-I conversion ratios, 76  μH/ Ω and 0.17  pF/Ω forTR-L andTR-C coefficients, and ∼35% for bothPED andPEC were found by measuring the performance characteristics. Compared with the electromagnetic and piezoelectric transformers, ME gyrators have good input and output characteristics that change thecapacitance andinductance features of the input and output ports. Our findings open a promising direction for developing a generation of converters for power electronics.

Source: Applied Physics Letters - November 16, 2016 Category: Physics Authors: Chung Ming Leung, Xin Zhuang, Junran Xu, G. Srinivasan, Jiefang Li and D. Viehland Source Type: research