Title :
A new coupled inductors design in 2-phase interleaving VRM
Author :
Yugang, Yang ; Dong, Yan ; Lee, Fred C.
Author_Institution :
Inst. of Electr. & Control Eng., Liaoning Tech. Univ., Huludao, China
Abstract :
In order to adapt the power delivery requirements of modern microprocessors of high current, low voltage and faster transient response, interleaving VRM with coupled inductors should be used. At first, this paper presents a numerical analysis of benefits of 2-phase coupled inductors and gives out the region of coupling coefficient in which the transient response speed increases meanwhile the steady-state ripple current decreases, coupled inductors should be designed in this region. Secondly, this paper proposes a novel magnetic coupling structure of 2-phase coupled inductors and sets up its magnetic model to simplify the coupling structure and reduce the winding length. Its validity is verified with 3D FEA simulation.
Keywords :
coupled circuits; finite element analysis; inductors; microprocessor chips; transient response; voltage regulators; 2-phase interleaving VRM; 3D FEA simulation; coupled inductor design; coupling coefficient; magnetic coupling structure; microprocessor; numerical analysis; steady-state ripple current; transient response; voltage regulator module; winding length; Coupling circuits; Inductance; Inductors; Interleaved codes; Low voltage; Magnetic cores; Microprocessors; Numerical analysis; Steady-state; Transient response;
Conference_Titel :
Power Electronics and Motion Control Conference, 2009. IPEMC '09. IEEE 6th International
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3556-2
Electronic_ISBN :
978-1-4244-3557-9
DOI :
10.1109/IPEMC.2009.5157410
