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首页> 外文会议>International Conference on Ferrites >DOWNSIZING OF TRANSFORMER BUILT INTO FLYBACK MODE POWER SUPPLY USING A NEW LOW LOSS Mn-Zn FERRITE WITH HIGH SATURATION FLUX DENSITY
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DOWNSIZING OF TRANSFORMER BUILT INTO FLYBACK MODE POWER SUPPLY USING A NEW LOW LOSS Mn-Zn FERRITE WITH HIGH SATURATION FLUX DENSITY

机译：使用具有高饱和通量密度的新的低损耗MN-Zn铁氧体，实现变压器的缩小功能。使用具有高饱和通量密度的新低损耗MN-Zn铁氧体

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New MnZn ferrite with high saturation flux density Bms was developed as material suitable for transformer cores built into flyback mode power supplies. The Bms at 100°C is 460mT and the core loss Pcv at 100kHz, 200mT and 100°C is 380kW/m~3. Bms is increased by 20% and Pcv is almost the same as that of the current low loss MnZn ferrite. By the circuit calculation, the transformer using the new ferrite was designed to reduce 20% in the cross sectional area and 30% in the volume, because of the 20% larger value of the incremental flux density AB than that of the current ferrite. In spite of the smaller volume, the temperature rise in the new ferrite transformer is almost equal to that of the transformer using the current ferrite. In addition, the gap length in the center pole of the new core was decreased so that the leakage flux, which causes eddy current loss in the windings, was reduced. The conversion efficiency of the power supply was, as a result, enhanced by 0.4%.
机译：具有高饱和助熔剂密度BMS的新MNZN铁氧体作为适用于反激模式电源内置的变压器核心的材料。 100°C时的BMS为460mt，100kHz，200mT和100°C的核心损耗PCV为380kW / m〜3。 BMS增加了20％，PCV几乎与当前低损耗MNZN铁氧体的相同。通过电路计算，使用新铁素体的变压器设计成减少横截面积20％，体积中的30％，因为增量磁通密度AB的20％较大的值比当前铁氧体的20％。尽管体积较小，但新铁氧体变压器中的温度升高几乎等于使用​​电流铁氧体的变压器的温度。另外，降低了新芯的中心极点中的间隙长度，使泄漏通量导致绕组中的涡流损失。结果，电源的转换效率提高了0.4％。

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