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Master's Dissertation
DOI
10.11606/D.54.1974.tde-17092010-103444
Document
Author
Full name
Luiz Ernesto Carrano de Almeida
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1974
Supervisor
Title in Portuguese
Carga espacial monopolar livre a voltagem constante
Keywords in Portuguese
Carga espacial a voltagem constante
Matriz com condutividade
Matriz sem condutividade
Abstract in Portuguese
Neste trabalho estudamos o movimento de cargas espaciais livres em sólidos dielétricos isolantes ou condutores, sub¬metidos à uma d.d.p. conhecida, admitindo uma distribuição qualquer de cargas que toca inicialmente um dos eletródios.Usando o método das características, reduzimos o problema à solução de uma equação diferencial de la. ordem. Como aplicações, resolvemos os casos de uma densidade linear, quadrática e exponencial, em sólidos com condutividade nula sob a condição de curto-circuito. Observamos que as distribuições tendem rapidamente para distribuições uniformes e, em certos casos, pode ocorrer inversão de corrente, dependendo do tipo de distribuição inicial
Title in English
Free-monopolar space charge at constant voltage
Keywords in English
Matrix com conductivity
Matrix sem conductivity
Space charge at constant voltage
Abstract in English
Free space charge motion is studied in solid dielectrics, insulators or conductors, under a given voltage. We assume an arbitrary charge distribution contact which is initially in contact with one of the electrodes. Using the "Method of Characteristics" we can reduce the problem to the resolution of a first order differential equation. Results are applied for linear, quadratic and exponential charge distributions in solids with zero conductivity under short¬circuit conditions. We saw that the charge profiles fall rapidly to uniform distributions and for cases dependent on initial distributions, current inversions are observed
 
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LuisCarranoM.pdf (1.38 Mbytes)
Publishing Date
2010-09-17
 
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