Artículos de revistas
A 12 kW three-phase low THD rectifier with high-frequency isolation and regulated DC output
Fecha
2004-03-01Registro en:
IEEE Transactions on Power Electronics. Piscataway: IEEE-Inst Electrical Electronics Engineers Inc., v. 19, n. 2, p. 371-377, 2004.
0885-8993
10.1109/TPEL.2003.823201
WOS:000220162400014
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal de Santa Catarina (UFSC)
Institución
Resumen
A robust 12 kW rectifier with low THD in the line currents, based on an 18-pulse transformer arrangement with reduced kVA capacities followed by a high-frequency isolation stage is presented in this work. Three full-bridge (buck-based) converters are used to allow galvanic isolation and to balance the dc-link currents, without current sensing or current controller. The topology provides a regulated dc output with a very simple and well-known control strategy and natural three-phase power factor correction. The phase-shift PWM technique, with zero-voltage switching is used for the high-frequency dc-dc stage. Analytical results from Fourier analysis of winding currents and the vector diagram of winding voltages are presented. Experimental results from a 12 kW prototype are shown in the paper to verify the efficiency, robustness and simplicity of the command circuitry to the proposed concept.