A magnetic field induced by an electromagnetic coil is the key variable that determines performance of a magnetically driven actuator. The applicability empirical models turns, static resistance, and inductance were discussed. Then, model mean was established analytically. Based on proposed model, sinusoidal response square-wave calculated with wire diameter as decision variable. amplitude phas...

home uterine activity monitoring (huam) has demonstrated to be of great value for preventing preterm labor in recent years. in this research, a low cost monitoring device for non-invasive monitoring of the uterine activity in pregnant women is presented. the new device has been designed based on an inductive colpitz oscillator and vertical displacement of a ferrite core in a coil. the resulting...

Induction Motor especially the squirrel cage type of this motor plays important role in industry. According to the application type, this motor place against various stresses that are caused failure in the motor. The most common failure is related to the Stator winding. Among these failures are turn-to-turn, coil-to-coil and phase to phase faults. Flow the high current do to the induction resul...

induction motor especially the squirrel cage type of this motor plays important role in industry. according to the application type, this motor place against various stresses that are caused failure in the motor. the most common failure is related to the stator winding. among these failures are turn-to-turn, coil-to-coil and phase to phase faults. flow the high current do to the induction resul...

introduction radiofrequency planar microcoils are used to increase the resolution of magnetic resonance images of small samples. in this study, we aimed to design and fabricate a spiral planar microcoil constructed on a double-sided printed circuit board (pcb). it has four rings with an internal diameter of 241 microns tuned and matched at 63.8 mhz. materials and methods to achieve the maximum ...

Introduction To obtain high-resolution magnetic resonance spectra (MRS), a homogeneous magnetic field is prerequisite with conventional methods. However, magnetic field homogeneity in vivo is often degraded in a large volume of human or animal tissues or in volumes with mixed tissues. Intermolecular double-quantum coherences (iDQCs), have been used to remove the effect of static field inhomogen...

INDEX OF SYMBOLS A Area enclosed by coil a Coil mean radius b Coil axial thickness c Coil radial thickness D Side length of square coil d Wire-to-wire spacing K Nagoaka coil constant l Coil length p Perimeter enclosed by coil P, F Grover disk coil constants R Circular wire radius s Side length of generic polygon w Trace width x, y Mean side lengths of rectangular coil μo Magnetic permeability o...

The principle object of this paper is to offer a modified design of Rogowski coil based on its frequency response. The improvement of the integrator circuit for nullifying the phase difference between the waveforms of the measured-current and the corresponding terminal voltage is a further object of this investigation. This paper addresses an accurate, yet more efficient measuring and protect...

statement of problem: a recent technique (mbt) has been introduced for easy and efficient orthodontic treatment by means of straight wire fixed appliances. although this technique has many advantages, in space closure stage causes up righting problem in upper incisors, which should be adjusted by applying additional torque in anterior region. purpose: the purpose of this clinical trial was to d...

hot spots are among the most serious operational issues in furnaces as they may result in the destruction of tubes. hence, it is essential to locate such hot spots precisely on the tube surfaces inside the industrial furnaces in order to secure a safe design and operation. in the current study, we have extended the model proposed by talmor in order to precisely locate the combustion hot spots o...