Alternating-Current Copper Loss Reduction in a High-Frequency Transformer for Railways Using a Magnetic Tape
Alternating-Current Copper Loss Reduction in a High-Frequency Transformer for Railways Using a Magnetic Tape
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使用磁带降低铁路高频变压器的交流铜损
DOI：
10.1109/tmag.2021.3113498
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发表时间：
2021
影响因子：
2.1
通讯作者：
Norio Koike
中科院分区：
文献类型：
--
作者：
K. Shimura;Kazuma Kubota;Mitsuhide Sato;Ttsutomu Mizuno;Masayuki Sakurada;Takao Nebashi;Norio Koike
考虑到安装空间，通过提高驱动频率来有效缩小铁路电源的尺寸是必要的。然而，驱动频率的增加增加了用于电源的开关和磁性元件的损耗。在这项研究中，我们专注于减少交流（ac）铜损由于皮肤和邻近效应的附加在适当的位置上的高频变压器的铁路线的外圆周上的磁性材料。在这篇文章中，我们提出了一个简单的方法，附加磁性材料的绕组在高频变压器使用磁带。在磁场模拟中，我们利用磁带来降低高频Transformer的交流铜损。使用阻抗分析仪进行实际测量时，16 kHz下的交流电阻降低了12.5%。在电流为31.6 A、频率为16 kHz的条件下，热饱和时的温升降低了21.4%。分析和实际测量表明，在高频Transformer中使用磁带可以减少交流铜损和发热。
The effective downsizing of power supply for railway by increasing the drive frequency is essential considering the mounting space. However, an increase in the drive frequency increases the loss in switching and magnetic elements used for power supplies. In this study, we focus on reduction of alternating current (ac) copper loss due to the skin and proximity effects by attaching a magnetic material at appropriate positions on the outer circumference of the wire in high-frequency transformers for railway. In this article, we propose a simple method of attaching magnetic materials to a winding in high-frequency transformers using a magnetic tape. In the magnetic field simulation, we could reduce ac copper loss in the high-frequency transformer using magnetic tape. The ac resistance at 16 kHz was reduced by 12.5% for the actual measurement using an impedance analyzer. The temperature rise at the thermal saturation was reduced by 21.4% for the energization experiment with a current of 31.6 A and frequency of 16 kHz. Analysis and actual measurements revealed that employing a magnetic tape in a high-frequency transformer can reduce ac copper loss and heat generation.