Title :
Modeling and Analysis for Beat-Frequency Current Sharing Issue in Multiphase Voltage Regulators
Author :
Sun, Juanjuan ; Lee, Fred C. ; Xu, Ming ; Qiu, Yang
Author_Institution :
Virginia Polytech. Inst. & State Univ., Blacksburg
Abstract :
Under high-frequency repetitive load transients, multiphase voltage regulators (VRs) suffer from beat-frequency oscillations of the phase currents. To investigate this issue, this paper develops a methodology based on the multifrequency model with describing functions. The influences from the interleaving operation are identified. After that, the analysis is extended to studying of the higher-order beat-frequency issue. Then, a solution by applying coupled inductors is proposed. Experimental and simulation results are presented as verification.
Keywords :
inductors; transients; voltage regulators; beat-frequency current sharing; coupled inductors; high-frequency repetitive load transients; interleaving operation; multiphase voltage regulators; Capacitors; Inductors; Interleaved codes; Power supplies; Power system modeling; Regulators; Switching frequency; Thermal stresses; Virtual reality; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2007. PESC 2007. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-0654-8
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2007.4342225
