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Master's Dissertation
DOI
10.11606/D.54.1975.tde-14102009-140715
Document
Author
Full name
Paulo Cesar de Camargo
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1975
Supervisor
Title in Portuguese
Estudo teórico sobre carga espacial monopolar livre.
Keywords in Portuguese
Carga espacial
Dielétricos
Abstract in Portuguese
Com hipóteses de simetria plana e que a distribuição inicial de cargas, ocupa totalmente a amostra (tocando os dois eletródios), estudou-se o problema do movimento de carga espacial livre (M.C.E.L.) monopolar, em sólidos isolantes, submetidos à uma d.d.p. conhecida. Utilizando o método das características, reduziu-se o problema à um sistema de duas equações diferenciais ordinárias,de ia. ordem. O método foi aplicado para as distribuições linear, exponencial e p ~ x -1/2 , sob condições de curto circuito. são apresentados gráficos relativos à evolução temporal do perfil da densidade de cargas e da corrente externa. Estes resultados são comparados com outros obtidos por um cálculo aproximado, baseado em princípios variacionais .
Title in English
Theoretical study of one-carrier free space charge
Keywords in English
Dielectric
Space charge
Abstract in English
Assuming planar symmetry and an arbitrary charge distribution that spreads through the sample, the one-carrier free - space-charge motion is studied in insulators solids. Using the method of characteristics we can reduce the problem t o the resolution of a system of two ordinary first order differential equations. Results are applied for linear, exponential and S.C.L. current charge distributions , under short-circuit conditions, The charge distribution for several times and the discharge currents are presented. The results are compared with those coming from an approximated method, based on variational principles.
 
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PauloCamargoM.pdf (1.36 Mbytes)
Publishing Date
2010-02-10
 
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