摘要：A novel integrated water treatment facility, inner-recycling continuous sand filter, is discussed. The theory of micro-flocculation is applied in the sand-washing circulation system with continuous filtration and backwashing. The design and operation parameters, which affect the performance of the filter, are discussed. The key design parameters are provided as follows: diameter of filter material is 0.7 to 1.0 mm, depth of filter bed is 0.6 m, filtration velocity is less than 12 m/h, ratio of gas to water is 9:11 and sand recycling rate is 2 to 4 mm/min.

摘要：针对目前桥式拓扑驱动中,因脉冲变压器隔离驱动器与MOSFET制造和安装过程中引入寄生参数,导致波形畸变及耦合干扰,从而引起驱动桥式拓扑过程中功率器件损坏和开关损耗大等影响驱动器品质的问题。给出引入寄生参数的脉冲变压器隔离驱动器驱动电路等效模型,在此基础上分析产生上述问题的内在机理,并以此为依据进行参数及电路优化,最后通过实验结果表明优化后的驱动信号具有最小的波形失真,驱动电压脉冲的前沿、后沿具有合适的陡度及合适的顶降,从而使MOSFET工作于最佳的开关过程,可有效地保证桥式拓扑电路安全可靠地运行。