Abstract The electromagnet is an important component of the circuit breaker operating mechanism. stable work depends on normal electromagnet. In order to study operation characteristics electromagnet, simulation model established analyze action moving iron core and coil current under On this basis, change typical faults, such as jamming voltage reduction, has also been studied. What’s more, cha...

A low-cost method, which integrates distance sensing functionality into a switched electromagnet by using a hybrid switching mode and current ripple measurements, is proposed. The electromagnet is controlled by a micro-controller via a MOSFET H bridge, utilizing a comparator-based current control. Additionally, a method for calculating the inductance of the electromagnet and approximating the m...

PURPOSE This paper represents the initial phase of a proposed operator-friendly semiautomatic method for positioning and directing an intravascular three-magnet tip catheter in the human heart using an electromagnetic system. METHODS A predictive computer algorithm based on a comprehensive mathematical model is developed, which accurately calculates the magnetic field generated by the electro...

Magnetic levitation is a technique to suspend an object without any support other than that of a magnetic field. The technique finds application in various fields where friction or abrasion between metallic surfaces (like bearings) or products of friction are detrimental to the environment or to the rubbing surfaces themselves. In a simple configuration, an electromagnet is used to lift up a fe...

In this paper, a linear actuator for precision positioning of dual objects is proposed based on a double friction drive principle using a single piezoelectric element (PZT). The linear actuator consists of an electromagnet and a permanent magnet, which are connected by the PZT. The electromagnet serves as an object 1, and another object (object 2) is attached on the permanent magnet by the magn...

For the removal of steel pellets from the rumen of sheep, a, powerful, lowvoltage electromagnet has been developed. This is introduced and withdrawn via the oesophagus. Manipulation of the sheep tips the pellet from the reticulum into the ventral rumen sac where it is accessible to the magnet. X-ray fluoroscopy is a useful although not an essential aid. For the removal of weakly magnetic pellet...

The Newtonian and relativistic relationships between the velocity, momentum and energy of an electron traveling at relativistic speeds are compared. Plots of these values are obtained using an electromagnet, velocity selector and solid-state detector. Values of the electron charge and electron rest energy are calculated at e = 1.44 ± .02 × 10−19 C and mec = 514 ± 6 keV, respectively. The possib...

This paper investigated experimentally the feasibility of the method to estimate the stress in the prestressing tendons of prestressed concrete bridges using the magnetic field induced by a moving electromagnet. This method is based on the Villari effect in which the magnetic permeability of prestressing tendons changes when subjected to a mechanical stress. The test results show high linearity...