Design and Implementation of an 18-kW 500-kHz 98.8% Efficiency High-Density Battery Charger With Partial Power Processing
Design and Implementation of an 18-kW 500-kHz 98.8% Efficiency High-Density Battery Charger With Partial Power Processing
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设计%20和%20实现%20of%20an%2018-kW%20500-kHz%2098.8%%20效率%20高密度%20电池%20充电器%20With%20部分%20功率%20处理
DOI：
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发表时间：
2022
影响因子：
5.5
通讯作者：
Agirman Ismail
中科院分区：
文献类型：
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作者：
Yuliang Cao;Minh Ngo;Ning Yan;D. Dong;R. Burgos;Agirman Ismail
可再生能源系统、微电网和交通电气化中储能系统的快速发展推动了对高密度、高效率双向电池充电器的需求。隔离式直流-直流转换器是一种关键器件，它与具有可变电压范围的电池连接。输入-并联-输出-串联（IPOS）部分功率（PP）转换器被认为是一种有前途的高效率、高密度解决方案，因为只有一小部分功率通过多级转换器处理以调节输出电压。然而，由于两个直流变压器（DCXs）之间的紧密耦合，PP变换器的设计是复杂的。为了解决这个问题，提出了一种双向软开关谐振型PP变换器的总体设计方法。在参数设计部分，提出了一种解耦设计方法，简化了DCXs的设计。利用该方法，可以分别设计两个DCX，并且可以容易地应用典型的优化方法。在硬件设计方面，为了减小交流回路电感和电阻，在电路布局和高频Transformer设计中采用了双向磁链抵消法和“内分”绕组结构，以获得较高的工作效率和功率密度。最后，整个设计过程是由一个18千瓦额定，25千瓦的峰值，在500 kHz的原型操作进行验证。实现的PP转换器具有98的峰值效率。8%，功率密度为142 W/in 3。本文附有两个视频，演示动态电压调节测试和效率测量。
The demand for high-density, high-efficiency bidirectional battery chargers is driven by the fast development of energy storage system in renewable energy system, microgrid, and transportation electrification. Isolated dc–dc converter that interfaces a battery with a variable voltage range is one of the critical components. Input-parallel output-series (IPOS) partial power (PP) converter is considered a promising high-efficiency, high-density solution because only a fraction of power is processed via multistage converters to regulate the output voltage. However, due to the tight coupling between two dc transformers (DCXs), the design of PP converter is complicated. To solve this issue, an overall design procedure for a bidirectional soft-switching resonant-type PP converter is proposed. In the parameters design part, a decoupled design method is proposed to simplify the DCXs design. With this method, two DCXs can be designed separately, and a typical optimization method can be easily applied. As for the hardware design part, to minimize the ac loop inductance and resistance, a two-direction (2-D) flux cancellation method and an “intraleaving” winding structure are proposed for circuit layout and high-frequency (HF) transformer to obtain high operation efficiency and power density. Finally, the whole design procedure is verified by an 18-kW-rated, 25-kW peak, prototype operating at 500 kHz. The realized PP converter features a peak efficiency of 98. 8% and a power density of 142 W/in3. This article is accompanied by two videos demonstrating the dynamic voltage regulation test and the efficiency measurement.