current adj. 1.通用的,流行的。 2.现在的,现时的,当时的。 3.流畅的;草写的。 the current price 市价。 current news 时事。 current expenditure 经常费。 current expenses 日常费用。 the current issue [number] (杂志的)本期。 the current week 本星期。 the current year 今年。 the 10th current [curt.] 本月十日。 current account 往来存款账;【法律】交互计算。 current English 现代通行英语,日常英语。 current handwriting 草书。 current money 通行货币。 current rate 现价,成交价。 current thoughts 现时代思潮。 pass [run, go]current 通用,流行。 n. 1.水流;气流;电流。 2.思潮,潮流;趋势,倾向。 3.进行,过程。 a cold current 寒流。 the Japan current 日本海流,黑潮。 the great current of events 天下大势。 a density 密着(海)流。 an alternating [a direct] current 【电学】交[直]流电。 current of air 气流。 current of time [the times] 时势,时代潮流 (go [swim] with [against] the current of the times 顺应[违反]时势)。
The controller can ensure reliable cool start , at the same time meet the rapid activation of the warm start . 3 、 the realization theory of the boost power factor correction that uses quasi - length models , uncertain frequency , and peak current - controlled devices , is derived theoretically 根据金卤灯击穿电压?时间的关系,提出了一种采用脉冲变压器的快速启动方式,既能保证冷灯可靠启动,同时又满足了热灯快速启动的要求。
During the circuit design , the author analyzed the basic principle of the direct current motor , pwm control , h - bridge power driver , and two control techniques of h - bridge power drive circuit , designed its general structure , so the feasibility of the design is confirmed . then , reference , oscillator , power dmos gate drive circuit ( charge pump , bootstrap ) , and dead time generation circuit are designed and analyzed in the sub - circuits . a current - controlled oscillator is presented in this thesis 在电路设计中,作者介绍了直流电机的工作原理和数学模型、脉宽调制( pwm )控制原理、 h桥电路基本原理和h桥功率驱动电路的两种控制模式,设计了驱动电路的总体结构,给出了电路的功能模块,确定了设计的可行性,然后在子电路模块中,重点分析设计了基准源电路、振荡器电路、高端功率管栅驱动电路(电荷泵及自举电路) 、低端功率管栅驱动电路和死区时间产生电路。
Simulation comparisons verify the superior performance of the tri - state pwm technology . experimental results indicate that the current - controlled tri - state pwm switching power amplifier based on sample - hold strategy has high frequency bandwidth and fast dynamic response in a wide load range , which can well meet the demands of high - speed magnetic bearing 仿真结果验证了电流三态调制技术的优越性能;实验表明本文研制的基于采样-保持策略电流三态调制开关功放具有结构简单、效率高、纹波小、电流动态响应快、频带宽、受负载影响小等优点,能很好地满足高速磁轴承的要求。
This paper analyses influence of inductance and capacitance to system , resonance of filter and output characteristic of inverter . after analyse the characteristic of inverter parallel system , form parallel system by current - controlled two state modulation inverters , and realize current sharing by pll and current - sharing circuit 分析了滤波电感和电容对系统的影响,并对输出滤波器的谐振现象和逆变器的外特性进行了深入的研究,证明了该调制技术抑制谐振的优点,指出了影响逆变器外特性的主要因素。
To transform a voltage - control problem to a current - control problem , a current - controlled voltage - source inverter ( cc - vsl ) is considered , and a power flow controller based on ph control algoritltnm is designed to improve dynamics of control system and implement closed - loop control to active and reactive power . to promote adaptation and robust , a self - tuned p1 power controller based on fuzzy rule is presented 论文还探讨了采用电流跟踪控制pwm电压型逆变器实现sssc的问题,将注入串联电压控制问题转换为逆变器的电流控制问题,以此建立了sssc控制系统的结构,并设计了基于pi控制算法的sssc的潮流控制器,仿真表明其改善了系统动态特性,实现了对p和q的闭环控制。
We take current - controlled dc / dc boost converter with feedback as a computer simulation example and explain the mechanism ; the simulation results demonstrate that by making use of chaos inherent in dc / dc boost converter and controlling parameters we can reduce emi level of the switched - mode power supply without any additional circuits being involved 以具有反馈环路的dc dcboost型变换器为对象,进行了机理阐述和计算机模拟。所得结果表明,利用开关模式电源中固有的混沌现象,通过简单的组合参数控制就可以在不附加任何外围电路的情况下降低开关模式电源的电磁干扰水平。