Nowadays,in order to expand the roof view to bring passengers closer to nature,more and more new energy vehicles are opting for canopy designs without sunshades.However,after removing traditional sunshades,new solutio...Nowadays,in order to expand the roof view to bring passengers closer to nature,more and more new energy vehicles are opting for canopy designs without sunshades.However,after removing traditional sunshades,new solutions must be sought to address issues such as heat insulation,glaring sunlight,and interior reflections from the roof glass during the summer months.This paper conducts an in-depth analysis of the technical advantages and shortcomings of sunshade-free canopy in terms of heat insulation and interior reflections during summer,from both theoretical analysis and experimental comparison perspectives,and proposes improvement strategies.The research results indicate that although the panoramic roof enhances the vehicle's interior view and technological appeal,it still has shortcomings in terms of heat insulation and the problem of interior reflections caused by direct sunlight.The proposed improvement strategies can effectively mitigate these issues,and offers consumers more comfortable and intelligent driving experiences.展开更多
介绍了一种用于市电环境下的可调光LED灯具电源的设计方法。220 V 50 Hz的交流电经过双向可控硅切相调压后送入电源,电源内部进行整流并通过BUCK降压处理输出到LED负载。电源设计以恩智浦半导体(NXPSemiconductors)SSL2101芯片为核心,...介绍了一种用于市电环境下的可调光LED灯具电源的设计方法。220 V 50 Hz的交流电经过双向可控硅切相调压后送入电源,电源内部进行整流并通过BUCK降压处理输出到LED负载。电源设计以恩智浦半导体(NXPSemiconductors)SSL2101芯片为核心,通过采集输入电压中的切相信号分量感知调光指令,改变PWM频率即占空比,实现与普通白炽灯相当的调光效果。实验表明,该电源方案切实可行,具有效率高,体积小的特点,已实用于家庭调光灯泡中。展开更多
文摘Nowadays,in order to expand the roof view to bring passengers closer to nature,more and more new energy vehicles are opting for canopy designs without sunshades.However,after removing traditional sunshades,new solutions must be sought to address issues such as heat insulation,glaring sunlight,and interior reflections from the roof glass during the summer months.This paper conducts an in-depth analysis of the technical advantages and shortcomings of sunshade-free canopy in terms of heat insulation and interior reflections during summer,from both theoretical analysis and experimental comparison perspectives,and proposes improvement strategies.The research results indicate that although the panoramic roof enhances the vehicle's interior view and technological appeal,it still has shortcomings in terms of heat insulation and the problem of interior reflections caused by direct sunlight.The proposed improvement strategies can effectively mitigate these issues,and offers consumers more comfortable and intelligent driving experiences.
文摘介绍了一种用于市电环境下的可调光LED灯具电源的设计方法。220 V 50 Hz的交流电经过双向可控硅切相调压后送入电源,电源内部进行整流并通过BUCK降压处理输出到LED负载。电源设计以恩智浦半导体(NXPSemiconductors)SSL2101芯片为核心,通过采集输入电压中的切相信号分量感知调光指令,改变PWM频率即占空比,实现与普通白炽灯相当的调光效果。实验表明,该电源方案切实可行,具有效率高,体积小的特点,已实用于家庭调光灯泡中。
