Highly efficient power conversion in magnetoelectric gyrators with high quality factor

Abstract

A high-Q magnetoelectric (ME) gyrator consisting of a trilayer laminate of nickel-iron-based constant elasticity alloy (Ni–Fe–Cr) and lead zirconate titanate with a coil wound around it has been developed and systematically characterized. Highly efficient magneto-mechanical-electric conversion can be achieved by means of the combination contributions of high quality factors from individuals, and much energy can be transferred through the gyration device. Under an electromechanical resonance frequency of 54.04 kHz, experimental results show that maximum efficiency reaches as high as 88.5% under an extremely low input density of 3.31 µW/cm3 with an optimum load resistance of 9.6 kΩ and a magnetic bias of 66 Oe. Such a highly efficient ME gyrator with a high Q factor can be beneficial or degrade the design goals that are likely to be achievable for practical applications in compact power transfer electronic devices.

Теория Квазистатического Магнитоэлектрического Взаимодействия В Трехслойных Асимметричных Пьезомагнитострикционных Структурах

“…Весьма перспективным оказалось использование пьезомагнитострикционных композиционных материалов для создания преобразователей ток-напряжение (МЭ гираторов) [1][2][3], сборщиков энергии [4], высокочувствительных датчиков магнитного поля [5][6][7][8][9][10][11], электрически перестраиваемых катушек индуктивности [12]. Для получения максимального эффекта принципиальным остается вопрос повышения эффективности МЭ преобразования, особенно в области низких частот, где величина МЭ связи практически не зависит от частоты.…”

Theory of quasi-static magnetoelectric interaction in three-layer asymmetric piezomagnetostrictive structures

“…The use of piezomagnetostrictive composite materials turned out to be very promising for the creation of current-to-voltage converters (ME gyrators) [1][2][3], energy harvesters [4], highly sensitive magnetic field sensors [5][6][7][8][9][10][11], electrically retuned inductors [12]. To obtain the maximum effect the question of increasing the efficiency of the ME conversion remains fundamental, especially in the low-frequency region, where the value of the ME coupling is practically independent of frequency.…”