Importance of composite parameters in enhanced power conversion efficiency of Terfenol-D/PZT magnetoelectric gyrators
Abstract
A gyrator that is capable of current-to-voltage conversion can be realized with a magnetoelectric (ME) composite of ferromagnetic and ferroelectric phases placed in a coil. Here, we report the dependence of the power conversion efficiency (PE) on the relative thickness of the two ferroic phases in a gyrator of Terfenol-D and PZT. Both experimental and theoretical results on PE as a function of composite parameters, such as thickness ratio of the ferroic layers (n), magnetic field bias (HBias) and several gyrator parameters, such as the resistance load (RL), were discussed. By decreasing the thickness ratio of Terfenol-D to composite (n = 0.28) in coil-ME gyrators, a high power efficiency of 73.9% was found at a fundamental resonance frequency of 72.5 kHz under a HBias of 1000 Oe and RL = 2.6 kΩ in experiments. At the same time, the non-linear mechanical loss was reduced by decreasing the value of n which resulted in a flat response over a wide HBias range. This improved power efficiency promises ME gyrators for power transfer devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 13, 2017
- Source ID
- 10.1063/1.4978751
Entities
People
- Chung Ming Leung
- D. Viehland
- Gopalakrishnan Srinivasan
- Jiefang Li
- Junran Xu
- Xin Zhuang
Organizations
- Defense Advanced Research Projects Agency
- Oakland University
- Virginia Tech