中文摘要：

由于电压调整模块（VRM）的磁件中存在较大的直流偏磁，限制了磁件尺寸和损耗的减小，进而制约了VRM向着低压大电流和“轻、薄、小”方向发展。文中以消除磁件的直流偏磁为突破点，提出了用于四相VRM的可消除直流偏磁的平面型两相集成磁件和四相集成磁件，并用“场”、“路”相结合的方法进行了理论分析和电磁设计，使磁件铁心中柱和中轭的直流偏磁都得到消除，与现有集成磁件相比，具有绕组长度小，所占VRM主板面积小，绕组损耗小，绕组制造工艺简化，铁心得到最充分利用等优点。通过仿真和实验验证了其正确性。

英文摘要：

Because of the DC-bias in the magnetics of voltage regulation module（VRM）, the size and loss can＇t be reduced easily, this restricts VRM＇s development of low voltage and large current and ＂light, thin and small＂. In order to eliminate DC-bias, this paper proposed a 2-phase planar integrated magnetics and a 4-phase planar integrated magnetics whose DC-bias in the central poles and yokes can be eliminated in 4-phase interleaving VRM, and gave the theory analysis and the electric-magnetic design of the integrated magnetics with the method of combining ＂field＂ and ＂circuit＂. The magnetics proposed in this paper have the advantages of shorter winding length, smaller winding area, smaller loss and simpler winding manufacture technology, and the core can be utilized most sufficiently. The simulation and experiment results show that the magnetics proposed in this paper are valid.