Control Unit for Electromagnet Current

Modeling, Simulation and Control of Dual Electromagnet Active Magnetic Levitation

This paper presents the simulation of the dual electromagnet Active Magnetic Levitation System realized in the COMSOL Multiphysics software. The mixed mode of Partial Differential and Ordinary Differential Equations is used to realize the levitated object motion. Two control scenarios are given as illustrative example of the working model.

Electromagnet Design Basics for Cold Atom Experiments

Handheld electromagnet carrier for transfer of hyperpolarized carbon-13 samples.

PURPOSE Hyperpolarization of carbon-13 ((13) C) nuclei by dissolution dynamic nuclear polarization increases signal-to-noise ratio (SNR) by >10,000-fold for metabolic imaging, but care must be taken when transferring hyperpolarized (HP) samples from polarizer to MR scanner. Some (13) C substrates relax rapidly in low ambient magnetic fields. A handheld electromagnet carrier was designed and con...

The Construction and Use of a Rumino-electromagnet for Sheep

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 This is introduced and withdrawn via the oesophagus.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...

A Review of the Control Techniques for Brushless Direct Current Motors (REVIEW PAPER)

This paper surveys the literature of the brushless DC motor speed control techniques. The paper should prove useful to both researchers as well as practising engineers as a signpost to the current state of the art. Based on the review some further studies are suggested.