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Projects / Programmes source: ARIS

Research of parameters for drying and vacuum impregmnation of paper capacitors

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Research activity

Code Science Field Subfield
2.09.02  Engineering sciences and technologies  Electronic components and technologies  Electronic components 

Code Science Field
T000  Technological sciences   
T001  Technological sciences  Electronics and Electrical technology 
T210  Technological sciences  Mechanical engineering, hydraulics, vacuum technology, vibration and acoustic engineering 
T170  Technological sciences  Electronics 
Keywords
drying, vacuum, impregnation, zemperature, moisture, pressure, degasation, paper dielectric....
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (17)
no. Code Name and surname Research area Role Period No. of publications
1.  21521  PhD Valentin Ažbe  Energy engineering  Researcher  2001 - 2002  183 
2.  03930  PhD Martin Bizjak  Electric devices  Head  2002 - 2003  93 
3.  11528  IVAN BLAŽIČ  Mechanical design  Researcher  2002  0 
4.  07480  Marjan Drab  Electronic components and technologies  Researcher  2002 - 2003  67 
5.  18469  MSc Samoel Malnarič  Electronic components and technologies  Researcher  2002 - 2003  5 
6.  14961  Zoran Mitrović  Electronic components and technologies  Researcher  2002 - 2003  1 
7.  15603  Andrej Mohar    Researcher  2001 - 2002  2 
8.  11667  MSc Vladimir Murko  Engineering sciences and technologies  Researcher  2001 - 2002  52 
9.  16218  Marko Pečar  Process engineering  Researcher  2002 - 2003  7 
10.  06963  MSc Andrej Pirih  Telecommunications  Researcher  2001 - 2002  45 
11.  08814  Franc Plevnik  Electronic components and technologies  Researcher  2002 - 2003  8 
12.  16219  MSc Erazem Polutnik  Process engineering  Researcher  2002 - 2003  19 
13.  11461  Branko Požek  Electronic components and technologies  Researcher  2002 - 2003  3 
14.  09619  Karol Požun  Electronic components and technologies  Researcher  2001 - 2002  56 
15.  01737  MSc Andrej Pregelj  Electronic components and technologies  Researcher  2002 - 2003  249 
16.  11524  Jože Rožman  Electronic components and technologies  Researcher  2002  8 
17.  11527  Željko Šutej  Electronic components and technologies  Researcher  2001 - 2002  0 
Organisations (1)
no. Code Research organisation City Registration number No. of publications
1.  0782  University of Ljubljana, Faculty of Mechanical Engineering  Ljubljana  1627031  29,777 
Abstract
Characteristics of metal foil wounded capacitors with intermediate paper insulation depend strongly on insualting properties of paper. Humidity of paper influences the insulation properties and dielectricity. Due to ionic impurities of absorbed water the paper resistivity is reduced, which causes the increase in the instability of capacitors. Therefore the paper should be dried as much as possible due to removal of water and than impregnated with an agent, having high dielectric coefficient and without ionic impurities. The capacitor windings should be protected against further water admission in technology procedure. During drying process the paper temperature has not to exceed 110 C. Therefore the vacuum drying is most suitable procedure. Manufacturers are still working under technological receipts that for years untill now haven't been tested or revised, the data about influence of paper and impregnant humidity on quality of capacitor are deficient. Simple methods are necessary to control the intermediate stages of manufacturing process in order to optimize the whole drying or impregnation procedure. The aim of research activity is to reproduce the existing technology results by using vacuum drying methods in a suitable vacuum system. The successive drying phases of samples will be characterised by measurement of relevant quantities of drying samples (temperature, pressure, humidity).The experimental results obtained in laboratory research will be extensively analized for it's planned industrial application in order to modify them for the applicability in industrial practice. Paralell with described activities a new method for humidity measurements will be introduced. By varying the experimental conditions in the system the optimal parameters for drying the capacitors windings and the impregnant will be found out.Above mentioned optimal parameters will serve as the guidelines in order to establish the new improved impregnation technology. It will be ecologically acceptable and will assure high quality of capacitors, grater production , smaller energy consuption and enlarged competition on market.
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