To realize larger‐capacity “Hybrid‐core transformer: HBT”, this research has assembled a 30‐MVA three‐phase trial HBT and evaluated the loss performances. The hybrid‐core consisting of the wound amorphous‐ and the stacked silicon steel‐cores, is expected having advantages of lower iron loss of the iron‐based amorphous material and the higher mechanical strength and saturation magnetic flux density of the silicon steels simultaneously. Three‐dimensional finite‐element method analysis revealed that the silicon steel core prevented over‐saturation of the amorphous core. The hybrid configuration enabled the design to have an approximately 10% higher magnetic flux density than configurations with only an amorphous core. We then assembled a prototype 30‐MVA three‐phase HBT designed on the basis of our investigation results. Operation tests demonstrated that the HBT has 62%‐reduced iron loss and 0.10%‐higher 50%‐loaded power efficiency from the conventional silicon steel core transformer.

中文翻译：

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通过试制演示了66 kV级30 MVA三相混合芯变压器的减损效果

为了实现更大容量的“混合芯变压器：HBT”，本研究组装了一个30 MVA的三相试验性HBT并评估了损耗性能。预计由缠绕的非晶态铁芯和堆叠式硅钢芯组成的混合芯具有以下优势：铁基非晶态材料的铁损更低，同时硅钢具有更高的机械强度和饱和磁通密度。三维有限元方法分析表明，硅钢芯可防止非晶态铁芯过饱和。混合配置使设计的磁通密度比仅具有非晶形磁芯的配置高约10％。然后，我们根据调查结果组装了30-MVA三相HBT原型。