| Titre : | Studies of air cored toroidal inductors |
| Auteurs : | Djalal Belahrache, Auteur ; P. N. Murgatroyd, Directeur de thèse |
| Type de document : | texte imprimé |
| Editeur : | Loughborough University of Technology, 1987 |
| Format : | 73 f. / ill. / 30 cm. |
| Note générale : |
Mémoire de Master : Electronic and Electrical Engineering : Royaume-Uni, Loughborough University of Technology : 1987
Bibliogr. f. 74 - 75 . Annexe f. 76 - 94 |
| Langues : | Anglais |
| Index. décimale : | Ms00387 |
| Tags : | Air cored toroidal inductors Shafranov D shape Fortran computer program Inductance Loss calculations |
| Résumé : |
The thesis is mainly concerned with some optimum designs for air cored toroidal inductors.
It also describes theoretical and practical investigations of the inductance and losses of toroidal cage coils with the optimum Shafranov D shape. Air cored toroidal inductors are used in many power electronics applications. Unlike solenoids they do not generate high external magnetic fields that can cause interference in other neighbouring components. They are also preferred to iron cored inductors because they do not have saturation problems. The thesis has three main sections. The first outlines two different methods giving a family of optimum shapes for the cross section of an ideal thin toroidal inductor. A fortran computer program was prepared for the numerical calculation of the optimum shape, its perimeter length, and the inductance of the whole toroid. The second part deals with the problem of winding the greatest possible inductance with a given length of wire for single layer toroids. It treats the problem of toroids with square, circular and D shape cross sections. In the case of D shape cross sections, the optimum radiusratio has been determined. This means that the most economical design for single layer toroids, with both optimum turns and optimum shape, is obtained. In the third part, the toroidal cage coil, which is a special type of toroidal inductors that was invented to overcome practical manufacturing problems, exploits the Shafranov D shape for maximum field energy. Five cages have been prepared to test the accuracy of a theoretical inductance formula. Loss calculations and measurements are also given for alternating currents and the frequency-squared dependance of proximity effects is shown. |
Exemplaires (1)
| Cote | Support | Localisation | Section | Disponibilité | Spécialité | Etat_Exemplaire |
|---|---|---|---|---|---|---|
| Ms00387 | Papier + ressource électronique | Bibliothèque Annexe | Mémoire de Master | Disponible | Electronique | Consultation sur place/Téléchargeable |
Documents numériques (1)
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BELAHRACHE.Djalal.pdf URL
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