Current Reduction Method for Dual Active Bridge Converter in Non-linear Dead-time Compensation Method
Current Reduction Method for Dual Active Bridge Converter in Non-linear Dead-time Compensation Method
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DOI：
10.1541/ieejias.140.175
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发表时间：
2020-03
影响因子：
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通讯作者：
Kengo Kawauchi;Hayato Higa;Hiroki Watanabe;K. Kusaka;J. Itoh
中科院分区：
文献类型：
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作者：
Kengo Kawauchi;Hayato Higa;Hiroki Watanabe;K. Kusaka;J. Itoh
本文提出了一种双有源桥式（DAB）变换器的控制方法，既实现了由于死区时间引起的非线性传输功率误差的减小，又实现了电感电流的三电平减小。通过三电平运算，在电感电流中设计一个零电流周期来补偿非线性传输功率误差。此外，还提出了三电平运行的电感电流减小方法。在非线性传输功率误差补偿方法中，通过确定零电流周期为死区时间，抑制循环电流来减小电感电流。通过一台2.0 kw样机验证了该方法的有效性。实验结果表明，传输功率误差降低了85.1%。此外，电感电流降低高达64.1%，损耗降低高达58.6%。此外，在电压控制中利用电压极性反转现象消除了直流偏置。
This paper proposes a control method for a dual active bridge (DAB) converter, which achieves both a reduction method of a non-linear transmission power error due to the dead-time and an inductor current reduction with a three-level operation. The non-linear transmission power error is compensated by designing a zero current period in the inductor current by the three-level operation. In addition, the inductor current reduction method for the three-level operation is also proposed. In the non-linear transmission power error compensation method, the inductor current is reduced by suppressing the circulating current with determining zero-current period to be the dead-time. The validity of the proposed method is confirmed by a 2.0-kW prototype. As the experimental results, the transmission power error is reduced by up to 85.1%. In addition, the inductor current is reduced by up to 64.1% and loss is reduced by up to 58.6%. Moreover, the DC offset is eliminated by utilizing the voltage polarity reverse phenomenon in the voltage control.