Hybrid Tunable Magnet Actuator: Design of a Linearized Force-Flux Tunable Magnet Actuator

Recent studies have shown that tunable magnets (soft permanent magnets) can significantly reduce Joule heating in electromagnetic actuators. To achieve high motion accuracy and repeatability, this article proposes a novel actuator design with a linearized force-flux relation. In prior designs of variable reluctance tunable magnet actuators,...

A review on non-destructive evaluation of construction materials and structures using magnetic sensors

The growing demand towards life cycle sustainability has created a tremendous interest in non-destructive evaluation (NDE) to minimize manufacturing defects and waste, and to improve maintenance and extend service life. Applications of Magnetic Sensors (MSs) in NDE of civil Construction Materials to detect damage and deficiencies have become...

Magnetic Field Prediction of U-shaped Interior Permanent Magnet Motor Considering Magnetic Bridge Saturation

In this article, a new analytical model for predicting the magnetic field of the U-shaped interior permanent magnet motor (IPMM) is proposed. In the polar coordinates, rectangular permanent magnets are equivalent to the combination of consistent fan-shaped subdomains, and after that, the Laplace or Poisson equation of each solution domain can...

A Review on Non-destructive Evaluation of Civil Structures Using Magnetic Sensors

The growing demand towards life cycle sustainability has created a tremendous interest in non-destructive evaluation (NDE) to minimize manufacturing defects and waste, and to improve maintenance and extend service life. Applications of Magnetic Sensors (MSs) in NDE of civil engineering structures have become of great interest in recent years...

Magnetic properties of structural steels for simulation of crack monitoring by finite element method

The metal magnetic memory method is a novel technique for monitoring fatigue cracks in steel structures, which can reduce operational expenses and increase safety by minimizing inspections. The crack geometry can be identified by measuring the self magnetic flux leakage, which is induced by the Earth’s magnetic field and the permanent...

Effect of stress-induced magnetization on crack monitoring by self magnetic flux leakage method

Wireless crack monitoring on ships and offshore structures based on Self Magnetic Flux Leakage (SMFL) measurements is a promising method to guarantee the structural integrity in a more effective way, leading to reduced operational costs and increased safety. For accurate crack sizing, the SMFL measurements must be interpreted correctly, also...

On self magnetic flux leakage in support of fatigue crack monitoring in ship and offshore structures: A numerical, experimental, and full-scale application study

Ship and offshore structures are prone to fatigue damage as they are cyclically<br/>loaded by waves. Therefore, regular inspection is needed in order to confirm adequate structural integrity throughout the entire service life of the structure. Detected fatigue cracks that are too long for safe operation need to be repaired. Detected cracks of...

Testing and Numerical Simulation of Magnetic Fields Affected by Presence of Fatigue Cracks

Magnetic interference pattern in planar SNS Josephson junctions

Simple phase bias for superconducting circuits

A superconducting phase-bias tool, based on a trapped fluxoid in a ring, is proposed and demonstrated. It can provide arbitrary phase values and is simple to fabricate. The phase bias has been realized in two superconducting quantum interference devices, where the critical current versus magnetic flux is shown to be shifted by ?/2 and ?.

Finite-size effects on the vortex-glass transition in thin YBa2Cu3O7-d films

Voltage noise of YBa2Cu3O7-d films in the vortex-liquid phase

Some problems concerning the accuracy and efficiency of self-consistent iterative calculations in magnetic recording