In this study, a magnetic field is analyzed using an analytical method and compared with the electromagnetic characteristics of 8-pole 9-slot 12-slot permanent magnet synchronous machines considering rotor eccentricity. The flux density back electromotive force (EMF) are derived perturbation theory theory. First, Fourier modeling performed through magnetization modeling, two analysis regions se...

Static eccentricity (SE) is frequently generated by manufacturing processes. As the nonuniformity of air-gap length caused SE, torque ripple and cogging increase in motor. This study analyzes distorted back electromotive force (EMF) due to SE. Further, a motor design considering SE performed for stable EMF low torque. First, was diagnosed analyzed using measured from test results base model. In...

A major part of the power consumption in the low-wattage reciprocating compressors, used for household refrigeration units, is associated with the motor. A variable speed compressor as opposed to a single speed compressor is known to provide energy savings due to its ability to match the load demand from the pump more closely to the power delivered by the pump. The current article presents an o...

This paper presents a distributed current source (DCS) method for modeling the eddy (EC) fields induced in biological or non-ferrous metallic objects two-dimensional axisymmetric and three-dimensional Cartesian coordinates. The EC objects, magnetic flux density (MFD) space, (MF) of sensing coils are formulated state-space representation. harmonic responses electromotive force (EMF) coil closed-...

Permanent magnet torque motor (PMTM) is widely used in aerospace, computer numerical control (CNC) machine tools, and industrial robots with many advantages such as high density, strong overload capacity, low ripple. With the upgrading of manufacturing, requirements for performance motors have become more stringent. At present, how to achieve output ripple has a research hotspot motors. In opti...

Nonlinear metasurfaces have become prominent tools for controlling and engineering light at the nanoscale. Usually, polarization of total generated third harmonic is studied. However, diffraction orders may present different polarizations. Here, we design an high quality factor silicon metasurface generation perform back focal plane imaging orders, which a rich variety states. Our results demon...

Because of a reported excess of cancers among children living near power lines, there is some concern that electric and magnetic fields (EMFs) induced by electric power sources may affect human health, and this possibility has provoked considerable controversy. The scientific question of whether there are such health effects is far from resolved. Building upon a set of detailed reviews of the a...