查询词典 ignition rectifier

This is a small circuit board in the base of the bulb that uses a rectifier, a capacitor and a pair of transistors to produce a steady, high-frequency voltage that stabilises the current which passes through the mercury vapour in the tube.

安定器是荧光灯基座上的一块小小的电路板，利用一个整流器、一个电容器和一对三极管产生一个稳定的高频电压来稳定通过灯管内汞蒸气的电流。

With theoretical analysis, three-phase general PFC controller based on One Cycle Control for three-phase three-switch rectifier is deduced.

完成了7kW的基于单周期控制的三相高功率因数整流器的方案设计，并给出了相应的仿真结果和试验验证。

Two situations are evaluated: In the first one, the load is a typical rectifier load with high crest factor, while, in the second one, this load is in parallel with a resistive load.

在两种情况下的评估：在第1 ，负荷是一个典型的整流负荷与高波峰因数，而在第二个1 ，这个包袱是在同向平行电阻负载。

In this paper, a Delta modulated single-phase current source HF rectifier is Studied.

针对Delta调节单相电流型高频整流器。

Exchange power supply system including electrical network height power source, kerosene engine power set emergency power supply (long time emergency power supply), integral part's UPS power source; The cocurrent power supply system by the rectifier, the accumulator cell (short time emergency power supply), the direct-current converter as well as the corresponding power distribution cabinet is composed; The good earth and the antimine device, may improve the correspondence quality, guarantees the communication facility and operator's security.

交流供电系统包括电网高低电源、油机发电机组备用电源、重要部门的UPS电源；直流供电系统则由整流器、蓄电池、直流变换器以及相应的配电柜组成；良好的接地和防雷装置，可以提高通信质量，确保通信设备及操作人员的安全。

This paper then compares three kinds of power conversion circuit applied in it and advances a main circuit which is based on IGBT's power grade nowadays and is applied in high power direct-driven grid-connected wind turbine. It is made up of a six-phase rectifier, two paralleled BOOST chopper circuits and two paralleled SPWM inverters.

文章在比较此种风力发电机的三种类型变流电路拓扑结构的基础上，提出了一种在考虑现有开关器件功率水平的情况下符合大功率直驱并网型风力发电机要求的变流电路拓扑结构，即采用&六相不控整流+两个并联的升压斩波+两个并联的三相SPWM逆变&的电路结构，并对其各部分电路的工作原理进行了分析。

The mathematical model and working modes of a novel three-phase two-arm three-level neutral-point-clamped pulse width modulation rectifier suitable for direct-driving wind power system are analyzed in detail, and the constant frequency control strategies based on space voltage vectors are proposed and applied to the rectification conversion of direct-driven power generation system.

系统分析了新型三相两桥臂三电平中性点箝位脉宽调制(pulse width modulation，PWM)整流器的数学模型和工作模式，提出了基于空间电压矢量的恒频控制策略，并将其应用于直驱风力发电系统整流变换中。

Wind power generation ; permanent-magnet direct-driven ; uncontrollable rectifier ; Boost chopper ; SPWM inverter ; direct-current control

风力发电；永磁直驱；不控整流；升压斩波； SPWM逆变器；直接电流控制

Large axial induced draft fan;; inlet box;; internal flow characteristics;; inlet flow conditions;; rectifier object

论文导师吴克启，论文学位硕士，论文专业流体机械及工程论文单位华中科技大学，点击次数 13，论文页数 85页File Size1796K

Since the harmonic spectrum of ac-side phase voltage of PWM rectifier is influenced not only by pulse modulation style, but also by the parameters of close-loop adjustors, a three-phase voltage source inverter controlled by TMS320F2812 has been built to obtain the harmonics purely generated by SVPWM and verify the algorithm.

由于PWM整流器交流侧相电压的谐波频谱不仅与脉冲调制方式有关，还受到闭环调节器参数的影响，因此该文搭建了以TMS320F2812为控制核心的三相电压型逆变器系统以得到单纯由SVPWM产生的谐波频谱，并对该算法进行验证。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。