查询词典 rectifier instrument

After technical transformation, we used the rectifier with high-frequency switch to replace the rectifier with controllable silicon, the JKQ-2000B central controller to replace the PLC, and new WDCX-2G computer-aided control isolation and grounding failure detection apparatus to repla.

技术改造选用了高频开关整流器代替可控硅整流装置，选用JKQ-2000B型中央监控器代替PLC可编程控制器，选用WDCX-2G新型微机直流系统绝缘在线监测及接地故障定位装置代替老型号的绝缘监测装置。

High-power rectifier devices can work efficiently to high frequency alternating current into direct current, in the'60s and'70s, Thyristor power rectifier tube and to the development and application of great development.

大功率硅整流器能够高效率地把工频交流电转变为直流电，因此在六十年代和七十年代，大功率硅整流管和晶闸管的开发与应用得以很大发展。

According to the characteristics of the conventional rectifier circuit that there exists a dead area with top wave,a new nonlinear rectifier circuit with impedance transformation has been.

针对常规整流电路输入电流存在死区、呈尖顶波的特点，设计了一种非线性阻抗变换整流电路，从而有效地克服和缩小了输入电流的死区范围，同时改善了系统的功率因数品质。

Another limitation of the vacuum tube rectifier was that the heater power supply often required special arrangements to insulate it from the high voltages of the rectifier circuit.

真空管整流器的另一个限制是加热器电源经常需要特别安排，以使它遭受高电压的整流电路的影响。

Finally, the simulation of the system and the experimental results of PWM rectifier are presented. The results of the simulation and experiment indicate that the input power factor is close to 1, the output voltage of the rectifier is stable and the high quality charge and discharge: current of the accumulator is achieved, current ripple is small.

本文最后给出了系统的仿真和PWM整流器实验波形，仿真和实验的结果表明：系统实现了输入功率因数接近1，变流器输出电压稳定；获得了较高质量的蓄电池充放电电流，电流纹波小。

Dynamic large-signal, DC, and small-signal circuit models including parasitic resistances and current ripples of nonideal synchronous rectifier buck converter operating in CCM are established. Closed-loop modeling of nonideal synchronous rectifier buck converter for voltage-mode control is studied. Transfer functions are obtained. Effects of parasitic components on control loop design of the converter are explored. Systematic simulation analysis is performed. All the results show that it is necessary to include parasitic components of converters into equivalent models.

首次建立了考虑寄生电阻和电流纹波的同步整流 Buck 变换器在连续工作模式下的大信号平均模型、DC 和小信号电路模型，研究了电压控制的闭环建模，导出了传递函数，剖析了变换器的寄生参数对其控制电路设计的影响，进行了小信号特性的仿真研究，进一步阐明了考虑变换器的寄生参数建模的必要性。

By using synchronous rectifier, a higher efficiency low-voltage output DC/DC converter module can be achieved. This paper presents a kind of synchronous rectification DC/DC converter, which includes active clamp circuit, insulating transformer, and current double synchronous rectifier.

为提高低输出电压的DC/DC变换器的效率，提出了一种倍流同步整流有源箝位DC/DC变换器，电路拓扑主要包括有源箝位电路、隔离变压器和倍流同步整流电路。

Intelligent nuclear instrument has been a dominant developing direction of radioactivity measurement instrument. The instrument for radon measurement of air pulse ionization chamber, based on the theory that alpha rays decayed by radon and its progeny can ionize the air molecules, can measure the radon concentration accurately.

智能核仪器已成为放射性测量仪器发展的一个主导方向，利用氡及其子体衰变放出α射线能使空气分子电离的理论设计的空气脉冲电离室α测氡仪可以准确地测量空气中的氡浓度。

When medical instrument draft condition becomes poor and the internal temperature rises reaching the controlled temperature of bimetallic strip temperature control unit, the normally closed stationary contact and normally closed moving contact disconnect to make main circuit power interruption and instrument stopping work, at the same time normally closed moving contact and normal open stationary contact switching-on, indicating light working, prompting the medical instrument being stopped because of superheating.

当医用仪器通风条件变差，内部温度上升，达到双金属片温控器的控制温度时，常闭静触点和常闭动触点断开，主电路供电中断，仪器停止工作，同时常闭动触点与常开静触点接通，指示灯工作，提示医用仪器因过热而停机。

"Celesta"= keyboard instrument: a musical instrument with keys that are played to make hammers strike metal plates, making a soft tinkling sound the tinkling, magic-sounding instrument which plays "Hedwig's Theme" in the film sountrack

Celesta：钢片琴：用锤子敲击可发出铃声似的声音的带键盘和金属片的乐器。（电影原声碟里《hedwig'stheme》中那种叮叮咚咚的乐声就是钢片琴演奏的。

As a dominant party,CPC government should play a guardian,supervisee and guarantee role to overcome all the difficulties in the development of charitable cause and bring it into full play in the establishment of harmonious society on policies and regulations basis.

在中国共产党的文献中第一次把发展慈善事业提到&最广泛最充分地调动一切积极因素，不断提高构建社会主义和谐社会的能力&的高度来认识。近年来，社会学界对慈善事业的理论专著发表较多，有鉴于此，笔者不揣浅陋，谈谈自己的认识和见解。

Flow through the land, the land of the scale of operation allows the effectiveness of the land may be raised.

通过土地的流转，土地的规模经营可以让土地的效益得到提升。