Abstract：In order to improve the dynamic performance and decrease the steady ripple current of VRM, this paper proposes a kind of array magnetic integration coupling inductors which can be used in 4-phase VRM with the method of combining multi piece cores. At first, this paper analyses the effect of the array integrated magnetics' parameters on VRM's performance in the condition of the leakage flux is not considered. Sets up the equivalent circuit model of the array integrated magnetics, and analyses its magnetic field with finite element analysis software. Secondly, this paper modifies the equivalent circuit model in the condition of the leakage flux is considered. Thirdly, this paper compares the equivalent circuit models of the array integrated magnetics and the separated magnetics in the condition of same equivalent steady inductance and dynamic inductance with circuit simulation. The simulated results verify the theory, and the experimental results show that 4-phase VRM with array integrated magnetics has a preferable dynamic performance.
李洪珠, 杨玉岗, 荣德生, 李洪璠. 应用于四相电压调整模块的阵列式集成磁件[J]. 电工技术学报, 2009, 24(8): 77-83.
Li Hongzhu, Yang Yugang, Rong Desheng, Li Hongfan. Array Integrated Magnetics Applied to 4-Phase Voltage Regulator Module. Transactions of China Electrotechnical Society, 2009, 24(8): 77-83.
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2009, Vol. 24 
