Technological conditions of the cathode material lini1 - xcoxo2 using like sol impregnation method at air atmosphere have been investigated systematically . the structure and cycling performance of the sample linio . 7coo . 3o2 obtained at optimal conditions have been further studied too . the results indicates that the sample exhibits good electrochemical properties when cycled at low current density , and the material has little volume changes , showing good stru 通过对不同充放电电流下材料的xrd图谱的特征及循环稳定性的分析，发现空气中合成的lini _ ( 0 . 7 ) co _ ( 0 . 3 ) o _ 2材料以低电流密度充放电时具有良好的电化学稳定性，当材料以低电流密度在0 . 3 1 - y 1 . 0范围内进行脱/嵌锂反应，材料的体积变化较小，结构稳定。
With promulgation and obliging actualization of iec 1000 - 3 - 2 etc . international standards , power factor correction ( pfc ) technique become a hotspot of research in power electronics field . based on average current mode , the paper introduce the design and implementation of a fully digital controlled single - phase boost power factor corrector with fast response . the control - loop circuit is realized using digital control and the corrector can tend to unity power factor , lower current harmonics and high transfer efficiency 本文在平均电流模式控制的有源功率因数校正技术的基础上，设计了一种控制电路基于数字信号处理器( dsp ) 、主电路采用boost变换器拓扑结构的全数字单相功率因数校正器，用数字电路代替传统的模拟电路来实现对整个回路的控制，最终使得校正器具有输入功率因数接近于1 、低电流谐波以及高转换效率的特性。
