Learn LLC voltage loop test based on RIGOL DHO924S oscilloscope measurement

 

LLC CONVERTER PROTOTYPE

 

Um conversor LLC (do inglês, "Inductance-Inductance-Capacitance") é um tipo de conversor ressonante que inclui quatro blocos principais: os interruptores de potência, o tanque ressonante, o transformador e o retificador de diodo. Os conversores LLC são conhecidos por sua alta eficiência, baixa EMI (interferência eletromagnética) e alta densidade de potência, tornando-os ideais para aplicações onde essas características são críticas.

High-Frequency Transformer Design Methodology

 

Optimal Design and Implementation of High-voltage High-power Silicon Steel Core Medium Frequency Transformer Pei Huang, Chengxiong Mao, Senior Member, IEEE, Dan Wang, Member, IEEE, Libing Wang, Yuping Duan, Jun Qiu, Guang Xu, and Huihong Cai

Optimal Design and Implementation of High-voltage High-power Silicon Steel Core Medium Frequency Transformer Pei Huang, Chengxiong Mao, Senior Member, IEEE, Dan Wang, Member, IEEE, Libing Wang, Yuping Duan, Jun Qiu, Guang Xu, and Huihong Cai 

Abstract—A 1.5 kV, 35 kW, 1 kHz silicon steel core medium frequency transformer is designed and prototyped for a 10 kV, 0.5 MW electronic power transformer. This transformer uses 0.18 mm silicon steel as core material due to the advantages of easy processing, high saturation flux density, low noise, and low cost. The detailed design considerations and an optimal design method are presented in this paper. Different from the previous work on medium frequency transformer design, the proposed approach takes ripples into account. Core loss model under square wave excitation with ripple and winding loss model considering sideband harmonics are established. Besides, 2D finite element simulations are adopted to obtain ac/dc resistance factors. Finally, the proposed approach is verified by experiments on prototype. The test results show performance better than expected, with efficiency over 99% and power density of 2.9623×106 W/m3.

VIEW FULL TEXT: https://ieeexplore.ieee.org/document/7862899

Processo de fabricação de transformador trifásico (Dongguan Wenbian Electric)

Processo de fabricação de transformador trifásico (Dongguan Wenbian Electric)