Title :
Signal flow graph modelling of DC-DC parallel converter with coupled inductors
Author :
Veerachary, Mummadi ; Senjyu, Tomonobu ; Uezato, Katsumi
Author_Institution :
Dept. of Electr. & Electron. Eng., Ryukyus Univ., Okinawa, Japan
Abstract :
A signal flow graph nonlinear modeling method is employed to develop a unified model for the DC-DC parallel converter with coupled inductors. Derivation of large, small-signal and steady-state models from this unified signal flow graph is demonstrated. Converter performance expressions (steady-state and small-signal characteristic transfer functions) are derived. A large-signal model is developed and programmed in TUTSIM simulator. Large-signal responses against load and supply disturbances are obtained. Furthermore, to validate the signal flow graph modelling, large-signal responses are compared with PSIM simulator. The results closely matching with each other thus, validating the signal flow graph modelling
Keywords :
DC-DC power convertors; inductors; transfer functions; DC-DC parallel converter; PSIM simulator; TUTSIM simulator; coupled inductors; direct coupling; interleaved operation; inverse coupling; large-signal responses; signal flow graph modelling; signal flow graph nonlinear modeling; small-signal characteristic transfer functions; steady-state characteristic transfer functions; Coupling circuits; DC-DC power converters; Flow graphs; Inductors; Power system reliability; Steady-state; Switches; Switching converters; Transfer functions; Voltage;
Conference_Titel :
Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the
Conference_Location :
Osaka
Print_ISBN :
0-7803-7156-9
DOI :
10.1109/PCC.2002.998170
