The design of the circuit ? key parameters including pulse width in the level shifter part and delay time of the filter circuit , and the necessity to add a limiting current resistor at source the ldmos were emphatic analyzed . author finished the design of each sub - circuit 对电路关键参数高低压电平位移脉冲宽度、高端滤波电路滤波宽度的设计及在ldmos源端加入限流电阻的必要性进行了重点分析,完成了各单元电路的设计。
With the application of real - time multi - tasks mechanism and modulization software structure , the controller can set and modify the parameters on - line , collect and process the real - time data of the four - battery charge / discharge devices , termly and digitally regulate the closed loop and monitor the real - time faults , so that the system can control different styles of charging and discharging operate mode such as in constant current style , constant voltage with limited current style and static style 控制器软件采用实时多任务机制和模块化的设计思想,通过对蓄电池化成充放电过程中工艺参数的在线设定修改、实时数据的采集处理、定时的数字闭环调节和故障的监测,实现对蓄电池静电、恒流、恒压限流等多种充放电工作方式的控制。
Based on the high - low voltage electric driving unit , a new electric driving unit is built , which not only has the advantages of the high - low voltage electric driving unit but also has the advantage of obtaining high limiting current and low maintaining current easily . using self - excitation chopper circuit , the electric driving unit is good efficient , and the heat creating from the solenoid is small 在高低压驱动电路的基础上又设计出一种高低压自激斩波恒流驱动电路,该驱动电路除了具有高低压驱动电路的功能外,还具有高压限流和低压维持电流获取方便、能量利用更为合理、阀发热更少等特点。
By analyzing the charging & discharging characteristics of accumulators , and by improving the hardware and control algorithm of the former chargers , this dissertation designes a high - power charger . the charger can not only charge accumulators with constant voltage and limited current , but also charge them intelligently . meanwhile , it is characteristic of over - voltage , over - current and overheat protection , self - recovery and automatic current - averaged in parallel 本论文通过对蓄电池的充、放电特性的分析以及对以往充电机硬件和控制算法两个方面的改善,设计了一种不仅能对蓄电池进行恒压限流充电,还可以进行智能充电,同时具有过压、过流、过热保护、自恢复功能和并联自动均流的大功率充电机。
The flow characteristics , distributions of current density and chemical components , and the performance of these two different designs are calculated and compared . the flow and mass transport characteristics are analyzed in detail , which indicate that strong forced convection is produced in the interdigitated flow field , which consist of dead - end gas channel that force the gases through the porous electrodes . results of comparison show that forced convection induced by the interdigitated flow field in the diffusion layer effectively enhances mass transport of reactants and products , thus leading to a higher cell performance and the limiting current density 在传统流道设计的pemfc中,反应物从流道到催化层的供应和生成物从催化层到流道的排出主要是以扩散为主,而在交叉梳状流道设计中,以流动带动的对流传递则占据了主导地位,而且这种以对流为主的传递机理大大提高了反应物和产物传递速率,从而有效地改善了电池的极限电流密度和极化性能等特性。
The limiting current, in electrochemistry, is the limiting value of a faradaic current that is approached as the rate of charge-transfer to an electrode is increased . The limiting current can be approached, for example, by increasing the electric potential or decreasing the rate of mass transfer to the electrode.
limiting currentとは意味:限界電流{げんかい でんりゅう} limiting current meaning:[Electronics] In electrolysis, the highest current that conducts under certain conditions of ion concentration. This current depends on the electrolyte material, the concentration of the electrolyte i...limiting current перевод:предельный ток