电流 current; galvanic current; electric current; electricity; current flow◇电流保护装置 current protective device; 电流饱和 current saturation; 电流倍增 current multiplication; 电流测量 current measurement; 电流测量仪表 current instruments; 电流差动 current differential; 电流常数 current constant; 电流断路器 tie [line] breaker; 电流方向 sense of current; 电流放大器 current amplifier; 电流分配 current division; 电流消耗 current drain; 电流效率 current efficiency; 电流效率测定法 current efficiency determination method; mination method; 电流谐振 current resonance; 电流选择开关 current selected switch; 电流指示器 current indicator
The difference between the method that the sum and the subtraction of two - arm currents are separately controlled and the method that two - arm currents are separately controlled is discussed , and the later method which is more simple and accurate is selected 比较了总电流与差电流单独控制和两臂电流单独控制这两种稳流方案的异同,从工程角度选择了一种较易实现和精度高的方案。
Unlike the traditional single mode of charge pump structure , the paper adopted 1x / 1 . 5x fractional adaptive charge pump , which can automatically convert working mode with the change of input voltage , and utilized ultra - low - dropout current regulators to make 0 . 15v led _ minimum regulation voltage in order to remain the charge pump working mostly in higher - efficiency 1x mode 与传统的单一转换模式的电荷泵结构不同,本文采用了1倍/ 1 . 5倍分数型自适应电荷泵技术,可随输入电压的变化自行转换工作模式;采用低压差电流调节器使led阴极最小调节电压仅为0 . 15v ,使电荷泵更多地工作在效率更高的1倍模式。
The mutual inductor of electric current and voltage mutual inductor play an important role in relay protection . prevent from ct differential to protect and miss movement an important subject that the generatrix is protected on the saturation , put forward two electric current pass zero hour linear to spread person who become put into differential to protect in ct in recent years , avoid ct saturation district , can judge the bus bar trouble correctly 但是在母线区外发生短路故障(特别是故障电流含有大量非周期分量)时, ct会出现饱和现象, ct饱和后,不能正确地传变一次侧电流,从而使二次电流发生严重畸变,产生很大的差电流,这样就容易引起误动作。防止ct饱和时差动保护误动作一直是母线保护的一个重要课题,近年来提出的在ct二次电流过零时的线性传变区投入差动保护,避开ct饱和区,能对母线故障做出正确判断。
A white led driver circuit is presented in this paper . the circuit drives up to four white leds with regulated constant current for uniform intensity . by utilizing proprietary adaptive 1x / 1 . 5x modes and ultra - low - dropout current regulators , it maintains the highest possible efficiency over the full 1 - cell li + battery input voltage range 整体电路以恒定电流驱动4只白光led ,利用1倍/ 1 . 5倍分数型电荷泵和低压差电流调节器,在整个锂电池供电电压范围内保持最高的效率,并使四个白光led获得均匀的亮度。