Now showing items 1-10 of 1547
Influence of double excitation AC/DC in the reactive power demand of 3-phase transformers
In this work it is discussed the performance of the reactive power demand in three-leg transformer core and three-phase transformer bank, under different conditions of AC/DC double excitation. In order to analyse the ...
A new three-phase low THD power supply with high-frequency isolation and 60V/200A regulated DC output
This work proposes a new isolated high power factor 12kW power supply based on an 18-pulse transformer arrangement. Three full-bridge converters are used for isolation and to balance the DC-link currents, without current ...
Planning of secondary distribution circuits through evolutionary algorithms
In this work, the planning of secondary distribution circuits is approached as a mixed integer nonlinear programming problem (MINLP). In order to solve this problem, a dedicated evolutionary algorithm (EA) is proposed. ...
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 ...
Asymmetrical magnetization in three-phase core type transformers
The performance of the three-phase core type transformers, under AC/DC double excitation is discussed in this work. It is presented a mathematical model that considers the mutual coupling between phases and the magnetic ...
Eigenvalue analyses of two parallel lines using a single real transformation matrix
For a typical non-symmetrical system with two parallel three phase transmission lines, modal transformation is applied using some examples of single real transformation matrices. These examples are applied searching an ...