Faculté des Sciences appliquées
Faculté des Sciences appliquées

Design and realization of very high voltage DC generators

Imeraj, Besir ULiège
Promotor(s) : Vanderbemden, Philippe ULiège ; Greffe, Christophe
Date of defense : 25-Jun-2018/26-Jun-2018 • Permalink :
Title : Design and realization of very high voltage DC generators
Translated title : [fr] Développement et réalisation d'alimentation DC très hautes tensions
Author : Imeraj, Besir ULiège
Date of defense  : 25-Jun-2018/26-Jun-2018
Advisor(s) : Vanderbemden, Philippe ULiège
Greffe, Christophe 
Committee's member(s) : Boigelot, Bernard ULiège
Embrechts, Jean-Jacques ULiège
Language : English
Number of pages : 121
Keywords : [en] high voltage DC generators
[en] X-rays
[en] DC
[en] Cockcroft-Walton generator
[en] X-RIS
[en] Full-wave circuit
[en] Half-wave circuit
[en] University
[en] Liège
[en] ULiège
Discipline(s) : Engineering, computing & technology > Electrical & electronics engineering
Funders : X-Ray Imaging Solutions (X-RIS)
Research unit : X-Ray Imaging Solutions (X-RIS)
Target public : Researchers
Professionals of domain
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil électricien, à finalité spécialisée en "electrical engineering"
Faculty: Master thesis of the Faculté des Sciences appliquées


[en] X-RIS is active in the development and supply of innovative solutions in digital radiology for the industry and the security. X-RIS provides user-friendly and pragmatic solutions that fit at best the application needs. The company is especially known in developing small and portable X-ray generators.
The present project aims at developing a new DC power supply for an X-ray generator. The DC supply is supposed to be as small as possible with an operating output voltage of 400 or 600 kV respectively having an output current of 0.25 and 0.15 mA. The size of systems working at a high voltage up to 400 kV is most of the time a few meters in height. Designing a generator that has a size of some centimeters is thus the main purpose.
To reach this objective, two kinds of circuits based on the Cockroft-Walton generator are studied: the half-wave and the full-wave multiplier. Through several simulations, the main features of both of them applied in particular cases of this project are exposed.
Furthermore, the final choices about the circuit design and the components are detailed. It will be shown through some tests the ways of decreasing the magnitude of the electric field in this high voltage generator. The processes of building up and testing the generator are also explained. Various insulating materials with their advantages and disadvantages are proposed. Finally, the tests suggest to follow some new perspectives that are also highlighted.



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  • Imeraj, Besir ULiège Université de Liège > Master ingé. civ. électr., à fin.


Committee's member(s)

  • Boigelot, Bernard ULiège Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Informatique
    ORBi View his publications on ORBi
  • Embrechts, Jean-Jacques ULiège Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Techniques du son et de l'image
    ORBi View his publications on ORBi
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