Title :
The LC-PWM-SF-RDC cell in the application of DC-DC converters and DC-link inverters
Author :
de Freitas, L.C. ; Hey, H.L. ; Vieira, J.B., Jr. ; Coelho, E.A.A. ; Farias, V.J. ; Da Cruz, D.F.
Author_Institution :
Univ. Federal de Uberlandia, Brazil
Abstract :
The use of the lossless commutation pulse width modulation (PWM) source feeding resonant disconnecting circuit (LC-PWM-SF-RDC) cell in the DC link and DC-DC power converter topologies is proposed. The most important property of this cell in DC-DC applications is the ability to regulate output power and voltage by PWM, with constant operating frequency, and without sacrificing the lossless commutation. In the case of a DC link application the use of the LC-PWM-SF-RDC cell allows the inverter legs to be switched in low frequency, while the resonant DC link circuit is switched in high frequency by using conventional PWM strategies for DC-DC power converters. Operation principles, output characteristics, relevant equations, simulation and experimental results are presented for use of this cell in a buck DC-DC power converter. The simulation results for a DC link inverter are presented
Keywords :
commutation; invertors; power control; power convertors; pulse width modulation; switching circuits; voltage control; DC link; HF; LF; PWM; buck DC-DC power converter; inverters; lossless commutation; power control; resonant disconnecting circuit; switching circuits; voltage control; Circuit simulation; DC-DC power converters; Frequency conversion; Pulse circuits; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; RLC circuits; Resonance; Switching circuits;
Conference_Titel :
Telecommunications Energy Conference, 1992. INTELEC '92., 14th International
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-0779-8
DOI :
10.1109/INTLEC.1992.268423
