Design, construction and performance of a buck-boost converter for an ultracapacitor-based auxiliary energy system for electric vehicles
Design, construction and performance of a buck-boost converter for an ultracapacitor-based auxiliary energy system for electric vehicles
复制标题
用于电动汽车超级电容器辅助能源系统的降压-升压转换器的设计、构造和性能
DOI：
10.1109/iecon.2003.1280706
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
J. Moreno
中科院分区：
文献类型：
--
作者：
M. Ortuzar;J. Dixon;J. Moreno
本文详细介绍了双向降压-升压变换器的设计、构造和测试过程。这种转换器被设想为在电动汽车的主要能源（在这种情况下是电池组）和基于超级电容器的辅助能源系统之间的受控能量传输设备。转换器能够以超过40千瓦的速率在两个方向上传输能量。电池组的标称电压为330v，而超级电容器的电压取决于它们的充电状态（SOC），范围从100v到300v。分析了控制电流传递和电流纹波的方程。这些方程将作为控制系统设计和平滑电感尺寸要求的指导。使用的拓扑结构是降压-升压配置。在设计平滑电感和管理热损耗时必须特别注意，因为这些对整体性能至关重要。该电感的额定功率为1.5 mH，能够在几分钟内以低损耗和无铁芯饱和（采用空气铁芯）传输200a。设计并制造了一种特殊的水冷式散热器，体积非常小，小于900cc，热阻小于0.011/spl°/C/W。控制系统在德州仪器公司的TMS320F241 DSP上实现，由两个控制回路组成。第一个回路控制转换器的电流，使用从第二个回路获得的值作为参考，第二个回路控制超级电容器的充电状态（SOC）。判定这第二个循环的准则在本文中没有讨论。最后给出了整个系统的一些实验结果。
This paper describes step by step the process of designing, constructing and testing a bidirectional buck-boost converter. This converter is conceiving to be used as a controlled energy-transfer-equipment between the main energy source of an electric vehicle (a battery pack in this case) and an auxiliary energy system based on ultracapacitors. The converter is able to transfer energy in both directions, at rates of more than 40 kW. The battery pack's nominal voltage is 330 V, while the ultracapacitor's voltage depends on their state of charge (SOC), ranging from 100 V to 300 V. Equations governing current transfer and current ripple are analyzed. These equations will be used as guidelines for the control system design and smoothing inductor size requirement. The topology used is a buck-boost configuration. Special care had to be taken in designing the smoothing inductor and managing thermal loses, for these are critical to the overall performance. The inductor constructed, rating l.5 mH, is capable of transferring 200 A for several minutes with low loses and no core saturation (air core was used). A special water-cooled heatsink was designed and constructed, with a very low volume of less than 900 cc and a thermal resistance of less than 0.011/spl deg/C/W. The control system was implemented on a TMS320F241 DSP from Texas Instruments, which consists in two control loops. The first one controls the converter's current, using as a reference the value obtained from the second loop, which controls the ultracapacitors state of charge (SOC). Criteria ruling this second loop are not discussed in this paper. Finally, some experimental results of the overall system are displayed.