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Proposal of a simplified process to correct the phase decoupling using modal analysis
(2012-12-11)
Modal analysis is widely approached in the classic theory of transmission line modeling. This technique is applied to model the three-phase representation of conventional electric systems taking into account their self and ...
25 kHz amorphous core transformer for induction heating applications
(Elsevier B.V., 1990-01-01)
The analysis of the feasibility and economics of amorphous core power transformers for induction heating applications in the field 10-50 kHz is developped. The results obtained on a 25 kHz-150 kVA concentric winding trial ...
Análise de falhas e defeitos nos transformadores de potência e seus dispositivos
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Eletrotécnica, 2014-07-25)
The purpose of this Completion of Course Work was study and analyzes the faults and defects of power transformers occurring in the electrical system of a certain electric energy company, aiming to contribute to improvements ...
New 12kW three-phase 18-pulse high power factor AC-DC converter with regulated output voltage for rectifier units
(1999-12-01)
This work presents a new high power factor three-phase rectifier based on a Y-connected differential autotransformer with reduced kVA and 18-pulse input current followed by three DC-DC boost converters. The topology provides ...
New 12kW three-phase 18-pulse high power factor AC-DC converter with regulated output voltage for rectifier units
(1999-12-01)
This work presents a new high power factor three-phase rectifier based on a Y-connected differential autotransformer with reduced kVA and 18-pulse input current followed by three DC-DC boost converters. The topology provides ...
Proposal of a simplified process to correct the phase decoupling using modal analysis
(2012-12-11)
Modal analysis is widely approached in the classic theory of transmission line modeling. This technique is applied to model the three-phase representation of conventional electric systems taking into account their self and ...
Análise de padrões de desligamentos de transformadores da rede básica
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Eletrotécnica, 2012-11-09)
This study presents a mathematical model of the maintenance applied at power transformers in Basic Network based on records about the duration of scheduled and unplanned shut downs. The monograph has as central theme, with ...
Estratégias de controle para correção da distorção harmônica da corrente de entrada do retificador Boost em MCD entrelaçado em série
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Sistemas de EnergiaUTFPR, 2019-05-15)
This work proposes two control techniques based on variable duty-cycle for the serial interleaved boost rectifier. The purpose of the control strategies is to increase the power factor and efficiency of the rectifier by ...