基于光伏并网逆变器的基本原理和拓扑结构,提出一种基于DSP的3 k W非隔离型光伏并网逆变器的设计。通过理论分析和计算,进行电路元件参数的设计,包括主电路参数、检测和保护电路、驱动电路的设计。搭建3 k W实验样机一台,样机实验表明,...基于光伏并网逆变器的基本原理和拓扑结构,提出一种基于DSP的3 k W非隔离型光伏并网逆变器的设计。通过理论分析和计算,进行电路元件参数的设计,包括主电路参数、检测和保护电路、驱动电路的设计。搭建3 k W实验样机一台,样机实验表明,该设计方案满足了逆变器的设计要求,能够实现安全、可靠并网运行,输出电流具有较低的谐波含量。展开更多
Core-shell structured SiO2/poly（N-isopropylacrylamide） （SiO2/PNIPAM） microspheres were successfully fabricated through hydrolysis and condensation reaction of tertraethyl orthosilicate （TEOS） on the surface of P...Core-shell structured SiO2/poly（N-isopropylacrylamide） （SiO2/PNIPAM） microspheres were successfully fabricated through hydrolysis and condensation reaction of tertraethyl orthosilicate （TEOS） on the surface of PNIPAM template at 50 ~C. The PNIPAM template can be easily removed by water at room temperature so that SiO2 hollow microspheres were finally obtained. The transmission electron microscope and scanning electron microscope observations indicated that SiO2 hollow microspheres with an average diameter of 150 nm can be formed only if there are enough concentration of PNIPAM and TEOS, and the hy- drolysis time of TEOS. FTIR analysis showed that part of PNIPAM remained on the wall of SiO2 because of the strong interaction between PNIPAM and silica. This work provides a clean and efficient way to prepare hollow microspheres.展开更多
文摘基于光伏并网逆变器的基本原理和拓扑结构,提出一种基于DSP的3 k W非隔离型光伏并网逆变器的设计。通过理论分析和计算,进行电路元件参数的设计,包括主电路参数、检测和保护电路、驱动电路的设计。搭建3 k W实验样机一台,样机实验表明,该设计方案满足了逆变器的设计要求,能够实现安全、可靠并网运行,输出电流具有较低的谐波含量。
文摘Core-shell structured SiO2/poly（N-isopropylacrylamide） （SiO2/PNIPAM） microspheres were successfully fabricated through hydrolysis and condensation reaction of tertraethyl orthosilicate （TEOS） on the surface of PNIPAM template at 50 ~C. The PNIPAM template can be easily removed by water at room temperature so that SiO2 hollow microspheres were finally obtained. The transmission electron microscope and scanning electron microscope observations indicated that SiO2 hollow microspheres with an average diameter of 150 nm can be formed only if there are enough concentration of PNIPAM and TEOS, and the hy- drolysis time of TEOS. FTIR analysis showed that part of PNIPAM remained on the wall of SiO2 because of the strong interaction between PNIPAM and silica. This work provides a clean and efficient way to prepare hollow microspheres.
