Dual-tube Forward Converter with Electromagnetic Integration of Various Magnetic Materials

doi:10.11985/2022.01.019

Abstract

Abstract:

Due to the large number of passive components, the traditional double switch forward soft switching converter has the disadvantages of larger prototype size and higher magnetic component loss. In order to solve this problem, firstly, the flexible multi-layer foil (FMLF) integration technology is used to realize the electromagnetic integration of large capacitors and magnetic components in circuits. Compared with the traditional magnetic integration technology, the volume of passive components can be further reduced and the utilization ratio of magnetic cores can be improved. Secondly, the use of permalloy strips section fill in column of air gap, it divided into multiple isometric stingy gap, both limits the magnetic leakage of the middle column winding, and narrowed the air-gap diffusion flux, effectively reduce the eddy current loss and winding losses caused by diffused flux, so as to effectively improve the power density of power supply and meet the demand of lightweight, miniaturization and high efficiency of new energy development. Finally, a 60 W prototype is built to verify the rationality of the application of the magnetic component.

Key words: Double switch forward converter, electromagnetic integration, a variety of magnetic materials, soft switch

CLC Number:

TM46

LI Hongzhu, FAN Longlong. Dual-tube Forward Converter with Electromagnetic Integration of Various Magnetic Materials[J]. Journal of Electrical Engineering, 2022, 17(1): 148-155.

Figures/Tables 17

References 15

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参数	数值
中柱有效截面积A_ez/cm²	0.597
边柱有效截面积A_ec/cm²	0.35
磁心体积V_e/cm³	3.92
磁心常数C₁/mm^-1	1.089
无气隙等效电感因数A_L/(nH/N²)	2 400

参数	数值
参数	原边绕组	副边绕组	电感绕组
匝数	28	14	7
励磁线线径	0.1×130	0.1×400	0.1×400
最大耐流值/A	5.105	15.705	15.705

参数	计算值	仿真值
变压器原边电感L_p/μH	227.26	229.97
变压器副边电感L_s/μH	56.815	56.947
滤波电感L_o/μH	14.400	15.434
谐振电感L_r/μH	19.900	19.765
谐振电容C_r/nF	3.000	2.991
铁心损耗P_core-loss/W	1.435	1.465
绕组损耗P_ohmic-loss/W	2.063	2.301