Editorial

TY - JOUR

T1 - Editorial

AU - Ravindra, Nuggehalli M.

N1 - Funding Information: The first of the papers focuses on ‘Modeling on magnetoelectric effect of functional piezoelectric dielectric’.1 This paper is by Jia-Wei Zhang (Northeast Electric Power University, Jilin City, China; Key Laboratory of Engineering Dielectric and Its Application of Ministry of Education, Harbin University of Science and Technology, Harbin, China; Key Laboratory of Silicon Device Technology, Chinese Academy of Sciences, Beijing, China), Hong-Yan Guo (Northeast Electric Power University, Jilin City, China), Wei-Xing Geng (State Grid Ningxia Electric Power Corporation, Maintenance Company, Ningxia, China), Chun-Ling Liu (State Grid Ningxia Electric Power Corporation, Maintenance Company, Ningxia, China) and Rui-Tong Liu (State Grid Liaoning Province Power Company Limited, Power Research Institute, Shenyang, China). In the context of wireless magnetoelectric devices based on functional dielectrics, this paper focuses on investigating the magnetoelectric response of a magnetic actuator by comparing the results of simulation with those of experiments. Multiphysics modeling of the magnetic actuator – composed of a piezoelectric bender coated with silver electrodes, a lock-in amplifier and magnetic poles – is carried out using the finite-element method and Multiphysics modules. Due to the direct coupling of the piezoelectric layer and the Lorentz force induced by eddy currents in the silver electrodes, a magnetoelectric voltage was generated on the suspended piezoelectric bender. The good agreement between the experimental data and the simulation results demonstrates the coupling between eddy-current-induced Lorentz forces in the silver electrodes and the piezoelectric layer. The proposed prototype is based on the magnetoelectric functional dielectric without the magnetic phase and also without applying a power source, so that it could be low cost, have linear feedback and be practical. These features make it a candidate prototype for a new type of magnetoelectric actuators and sensors. Funding Information: The fourth paper ‘Arcing failure analysis of miniature circuit breaker using nano-W–Cu material’4 has been reported by Dezhi Xiong (Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Ministry of Education, Wuhan University of Technology, Wuhan, China; Metering Center of State Grid Hunan Electric Power Company, Changsha, China), Xiangqun Chen (Metering Center of State Grid Hunan Electric Power Company, Changsha, China), Jie Yang (Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Ministry of Education, Wuhan University of Technology, Wuhan, China), Yi Zuo (Energy and Power Engineering College, Changsha University of Science and Technology, Changsha, China), Junhua Hu and Jinbo Li (Metering Center of State Grid Hunan Electric Power Company, Changsha, China). In order to solve the problem of frequent failures of miniature circuit breakers and the resulting short arcing, research on nano-tungsten–copper (nano-W–Cu) material in arcing failure analysis of miniature circuit breakers was carried out by the authors. Ordinary pure copper material – which is widely used in electrical power distribution – exhibits major limitations such as low melting point and metal vapor, which causes frequent failure of the miniature circuit breaker. In this way, on the basis of analyzing the mechanism of miniature circuit breaker arcing and using nano-W–Cu material, this paper makes provisions for the 10 kA tolerance test process and conditions of short-circuit current and extracts the commonly used test for a certain type of miniature circuit breaker combined with nano-W–Cu material. The test results show that miniature circuit breaker arcing can be reduced by using nano-W–Cu material to replace the ordinary pure copper alloy. This could significantly enhance the performance of miniature breaker arcing and its breaking capacity and reduce the miniature circuit breaker arc time as well as the breaking time, which could effectively improve the reliability, security and stability of miniature circuit breakers and effectively solve the problem of miniature circuit breaker arcing failure.

PY - 2018

Y1 - 2018

UR - http://www.scopus.com/inward/record.url?scp=85058305225&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85058305225&partnerID=8YFLogxK

U2 - 10.1680/jemmr.2018.7.1.1

DO - 10.1680/jemmr.2018.7.1.1

M3 - Editorial

AN - SCOPUS:85058305225

SN - 2046-0147

VL - 7

SP - 1

EP - 3

JO - Emerging Materials Research

JF - Emerging Materials Research

IS - 1

ER -