Compared with general circular flanges, flanges on conical shells have different configurations. In the Chinese national code GBISO, however, there are no related contents about flange design of this kind of type. So,...Compared with general circular flanges, flanges on conical shells have different configurations. In the Chinese national code GBISO, however, there are no related contents about flange design of this kind of type. So, it needs to study loads of flanges of this kind of type. This paper takes the flange connection of a wide angle diffuser in a transonic and supersonic wind tunnel as the background, according to the principles of flange design in Chinese national code GB150, combining the characteristics of flanges of a wide angle diffuser, the loads of flanges have been analyzed, and the equations of loads and their locations have been presented.展开更多
文中提出一种集成可变母线的宽输入范围双有源全桥(dual active full bridge,DAB)变换器。与传统DAB变换器不同,所提变换器本质上是四开关Buck-Boost变换器与DAB变换器原边全桥进行复用,从而实现可变母线的构造与集成。通过调节可变母...文中提出一种集成可变母线的宽输入范围双有源全桥(dual active full bridge,DAB)变换器。与传统DAB变换器不同,所提变换器本质上是四开关Buck-Boost变换器与DAB变换器原边全桥进行复用,从而实现可变母线的构造与集成。通过调节可变母线的电压,可以在很宽的电压调节范围内实现电压匹配。同时辅助电感仅处理总功率的一部分并以连续导通模式工作,从而降低损耗并减小尺寸。所有开关均被证明可实现理论上的全负载范围零电压开关操作。此外,提出一种混合脉宽调制加相移调制控制策略来实现电压匹配控制并调节功率流;详细介绍其工作原理、工作特点和参数设计原则;最后,搭建一台1 k W实验室样机来验证理论分析。展开更多
文摘Compared with general circular flanges, flanges on conical shells have different configurations. In the Chinese national code GBISO, however, there are no related contents about flange design of this kind of type. So, it needs to study loads of flanges of this kind of type. This paper takes the flange connection of a wide angle diffuser in a transonic and supersonic wind tunnel as the background, according to the principles of flange design in Chinese national code GB150, combining the characteristics of flanges of a wide angle diffuser, the loads of flanges have been analyzed, and the equations of loads and their locations have been presented.
文摘文中提出一种集成可变母线的宽输入范围双有源全桥(dual active full bridge,DAB)变换器。与传统DAB变换器不同,所提变换器本质上是四开关Buck-Boost变换器与DAB变换器原边全桥进行复用,从而实现可变母线的构造与集成。通过调节可变母线的电压,可以在很宽的电压调节范围内实现电压匹配。同时辅助电感仅处理总功率的一部分并以连续导通模式工作,从而降低损耗并减小尺寸。所有开关均被证明可实现理论上的全负载范围零电压开关操作。此外,提出一种混合脉宽调制加相移调制控制策略来实现电压匹配控制并调节功率流;详细介绍其工作原理、工作特点和参数设计原则;最后,搭建一台1 k W实验室样机来验证理论分析。
