Load Test Method Using Two Small-Capacity Power Supplies for High-Frequency Transformers in Single-Phase Dual Active Bridge Converters
Load Test Method Using Two Small-Capacity Power Supplies for High-Frequency Transformers in Single-Phase Dual Active Bridge Converters
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DOI：
10.1109/apec43580.2023.10131148
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
K. Orikawa;S. Ogasawara
中科院分区：
文献类型：
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作者：
K. Orikawa;S. Ogasawara
本文提出了一种使用两个小容量的电源高频变压器的单相双有源桥（DAB）变换器工作在40 kHz的负载测试方法。实验证明，当测试用Transformer的额定输出功率为1 kW时，两个电源的总视在功率仅为56 VA。此外，实验结果表明，与通过从Transformer的输入功率中减去输出功率来获得功率损耗的传统方法相比，功率损耗测量的准确性提高了，因为在所提出的负载测试方法中，可以直接测量励磁损耗和负载损耗，并且功率分析器对于每个电源的电压和电流的范围可以适当地调整到每个电源的电压和电流。这是所提出的负载测试方法除了减少变压器负载测试的电源容量之外的另一个优点。
This paper proposes a load test method using two small-capacity power supplies for high-frequency transformers in single-phase dual active bridge (DAB) converters operated at 40 kHz. It is experimentally verified that the total apparent power for two power supplies is only 56 VA while the rated output power of a test transformer is 1 kW. Moreover, experimental results show the accuracy of power loss measurement is improved compared to a conventional method which obtains the power loss by subtracting an output power from an input power of the transformer because in the proposed load test method the excitation loss and the load loss can be measured directly, and the range of voltage and current of the power analyzer for each power supply can be properly adjusted to the voltage and current of each power supply. This is another advantage of the proposed load test method in addition to reducing the capacity of the power supply for the load test of transformers.