针对智能手机和平板电脑等移动设备的快速充电是消费电子行业中增长最快和规模最大的市场之一,相应电源适配器每年全球使用量达数亿件以上。其中涉及一系列新兴技术和挑战,包括USB Power Delivery(PD)。本文将探讨一些目前与快充相关的A...针对智能手机和平板电脑等移动设备的快速充电是消费电子行业中增长最快和规模最大的市场之一,相应电源适配器每年全球使用量达数亿件以上。其中涉及一系列新兴技术和挑战,包括USB Power Delivery(PD)。本文将探讨一些目前与快充相关的AC/DC功率转换关键技术,重点讨论对USB PD的支持、技术的发展,以及Dialog在这方面提供的最新产品和解决方案。展开更多
高级控制技术可缓解用LED替代MR16卤素灯泡时产生的变压器负载问题电子变压器（E T）的基本原理图含有一个常规全桥整流器,一个自激振荡斩波电路和输出功率变压器。与线路电压相比,自激振荡电路的工作频率相对较高,一般在20~300k H z之...高级控制技术可缓解用LED替代MR16卤素灯泡时产生的变压器负载问题电子变压器（E T）的基本原理图含有一个常规全桥整流器,一个自激振荡斩波电路和输出功率变压器。与线路电压相比,自激振荡电路的工作频率相对较高,一般在20~300k H z之间。这可以在变压器输出级上使用较小的磁性元件,从而使电子变压器的总体成本低于磁性变压器。电子变压器影响卤素LED照明的主要特征是它们的自激振荡中间级。展开更多
For three weeks in October 2009, the U.S. Department of Energy hosted the Solar Decathlon Competition in which 20 teams of college and university students competed to design, build, and operate their own version of a ...For three weeks in October 2009, the U.S. Department of Energy hosted the Solar Decathlon Competition in which 20 teams of college and university students competed to design, build, and operate their own version of a solar-powered house. Team North＇s mission was to deliver North House, a compelling, marketable solar powered home for people with active lifestyles, while building Canada＇s next generation of leaders in sustainable engineering, business and design. This paper deals with a solar-assisted space heating system that was studied as a potential design for the competition. Among several other conclusions, it was found that using a solar-assisted in-floor heating system can decrease the energy consumption to only 8% of the case without the in-floor loop.展开更多
文摘针对智能手机和平板电脑等移动设备的快速充电是消费电子行业中增长最快和规模最大的市场之一,相应电源适配器每年全球使用量达数亿件以上。其中涉及一系列新兴技术和挑战,包括USB Power Delivery(PD)。本文将探讨一些目前与快充相关的AC/DC功率转换关键技术,重点讨论对USB PD的支持、技术的发展,以及Dialog在这方面提供的最新产品和解决方案。
文摘高级控制技术可缓解用LED替代MR16卤素灯泡时产生的变压器负载问题电子变压器（E T）的基本原理图含有一个常规全桥整流器,一个自激振荡斩波电路和输出功率变压器。与线路电压相比,自激振荡电路的工作频率相对较高,一般在20~300k H z之间。这可以在变压器输出级上使用较小的磁性元件,从而使电子变压器的总体成本低于磁性变压器。电子变压器影响卤素LED照明的主要特征是它们的自激振荡中间级。
文摘For three weeks in October 2009, the U.S. Department of Energy hosted the Solar Decathlon Competition in which 20 teams of college and university students competed to design, build, and operate their own version of a solar-powered house. Team North＇s mission was to deliver North House, a compelling, marketable solar powered home for people with active lifestyles, while building Canada＇s next generation of leaders in sustainable engineering, business and design. This paper deals with a solar-assisted space heating system that was studied as a potential design for the competition. Among several other conclusions, it was found that using a solar-assisted in-floor heating system can decrease the energy consumption to only 8% of the case without the in-floor loop.
