By high voltage and high power, the pulse source also can beapplied for the measurement of soil resistivity.
由于设计的输出电压幅值较高，功率较大，所以该电源也可以应用于土壤电阻率测量系统中。
This invention relates to envelope impulse control PWM technique, it can occur envelone impulse used for working process. It has two type main circuit in secondary winding of high frequency transformer, so the pior power frequency transformer set in electrospark pulse power system is eliminated.
本发明采用包络脉冲控制PWM技术，去掉了电火花脉冲电源中传统的工频变压器，可直接产生出加工用的包络式脉冲，在高频变压器的副边有两种形式的主回路。
High power electromagnetic pulse; measurement technique; standard gain horn; waveform reconstruction
高功率电磁脉冲；测量技术；标准增益喇叭天线；波形重建
The RNSIC is equipped with diodes, inductors and capacitors, the operational principle, characteristics, design method, disadvantages and improved scheme of which are illustrated in detail. The novel 24-pulse rectifier connects the primary side of its phase-shifting transformer with the rectifier in series, so the input power of the transformer is only half of the input one of the rectifier. In the dc side, a voltage injection circuit is added to give the input currents into shape. The analysis, simulation and experiment on it are given in this paper. The high power factor three-phase rectifier adopting third-harmonic currents injection is researched then, in which the third harmonic is provided by LC resonant circuit and injected to the ac side. A novel circuit is given and analysed detailly in this paper.
RNSIC整流器由三相二极管整流桥、输入滤波电感和与整流二极管并联的电容构成，本文分析了其工作原理、特性、参数设计方法及存在的缺陷，并提出了改进方案；新型24脉波整流器移相变压器原边线圈串联在输入侧，使得变压器输入功率只有整流器输入功率的一半，在直流侧注入6次方波电压，以达到24脉波的效果，论文对其进行了分析、仿真及实验研究；采用三次谐波注入法的三相整流器通过在直流侧引入三次谐波电流，注入交流侧，达到整形输入电流的效果，论文提出了一种新型谐波注入方案，并给出了分析、仿真和实验研究。
The heat conduction in frozen biological tissue irradiated by high - power short - pulse laser was investigated experimentally. The micro - scale film resistance thermometer with 1 JAS response time was used to measure temperature.
本文采用响应时间为1μs的超小型薄膜铂热电阻温度计及日本YOKOGAWA DL2700高速数字示波器，对微秒量级脉冲激光照射下冷冻生物组织内的热传导进行了实验研究。
A single-stage and high power pulse tube cooler working between 20~40 K has been designed and constructed in order to precool the second stage of a 4 K separate two-stage pulse tube cooler.
为了满足液氦温区分离型二级脉管制冷机第二级预冷的需要，设计制作了1台20～40K温区单级大功率脉管制冷机。
The pre-pulse duration and contrast are very important in the ultra-high power CPA laser system.
在超强激光系统中，对比度和本底宽度是压缩光脉冲极为重要的指标。
The high coulomb and current power pulse closing switch is one of the crucial components of the power conditioning system.
脉冲能源系统的关键元件之一是高库仑量大电流的脉冲闭合开关。
Pumping with a high power LD and with a Q switching technology, laser pulse with the characteristics of high repetition rate, high peak power and shot pulse width, will be obtained.
用较大功率LD作为泵浦源并利用调Q技术，可以获得高峰值功率高光束质量的激光输出，这在激光测量、激光雷达、激光遥感等领域有着非常广阔的应用前景。
To compare with the traditional constant current capacitor charging power supply, the series resonance capacitor charging power supply which is developed in recent years has a more constant current, small volume, high efficiency, high power density and its suitable for variable capacitor load in a large range. so it is very suitable for capacitor charging power supply and can satisfy the demand of the repeat frequency pulse power technology.
近年来发展起来的串联谐振充电电源与传统直流电源相比较，具有恒流充电、体积小、效率高、功率密度大、适合宽范围变化的负载等优点，是较为理想的电容器充电电源，能更好的满足当前重复频率脉冲功率技术下对电容器充电电源的要求。
The paper mainly analyzes the characteristics of YAG laser, free electron laser and TEA CO_2 laser, compares their average power, peak power, high single-pulse energy, and transmitting property in atmosphere. The result shows nowadays, TEA CO_2 laser is the most appropriate one at present to be used as the high power source in the field. It's power can reach 10kW level, single pulse energy can reach 0.5～1kJ, repetitive frequency is 20～40Hz, the laser wavelength lies in the atmospheric window, and it isn't sensitive to the atmospheric change. The laser work media flows fast, and it has no the thermal lens effect and damage threshold.
主要分析了目前YAG固体激光器、自由电子激光器和TEA脉冲CO2激光器的特点，通过上述4个方面性能的比较，认为在目前水平下，TEA脉冲CO2激光器是进行激光推进的首选强激光源，其优点表现在：功率可达10kW量级，单脉冲能量可达0.5～1kJ，重复频率为20～40Hz；激光波长处于大气传输窗口，对大气变化不敏感；工作物质快速流动，不存在热透镜效应和破坏阈值；相关光学元件易于制造；光束质量较好；运行成本低。
Its high/low voltage level shift circuit adopt double pulse triggered model to reduce the power loss, filters and current limit resistances are also adopted to avoid the fault triggering induced by the transient displacement current caused by dV/dt of the highside and the premature breakdown of the LDMOS. The static latch-up characteristics of CMOS in the circuit is analyzed. It is demonstrated that vertical triggering current is far smaller than lateral triggering current, and the vertical triggering current of high-side even reduces following the rise of the high-side floating power, so that vertical triggering is easier to cause the CMOS to latch up. n〓 and p〓 stopper are introduced accounting that the transient displacement current caused by dV/dt of the high-side must worsen its latch up characteristics.
结隔离采用双降场层结构可得到足够的高端穿通电压，使结隔离高/低端SPIC与常规CMOS工艺兼容；高/低压电平转移采用双脉冲触发模式降低电路功耗，并加入滤波电路和限流电阻避免高端dV/dt产生的瞬态位移电流导致误触发以及LDMOS过早击穿；分析了该电路中CMOS的静态闩锁，指出纵向触发电流远小于横向触发电流，且它随高端悬浮电源的提高而减小，以至纵向触发更容易使CMOS闩锁；考虑高端dV/dt产生的位移电流会恶化CMOS的闩锁，采用n〓和p〓沟道截止环以提高电路抗闩锁性能。
The high-power special pulse power supply has been accomplishe...
电源可分别工作于恒压、恒流两种工作方式。
Filamentation also refers the self-focusing of a high power laser pulse.
成丝还提到了自聚焦的高功率激光脉冲。
But along with the technical development in electronics technology and establishment in the power cable distributing parameter theory foundation, it appears the low voltage pulse method and pulse electric current method, and the pulse electric current method is divide into the two kinds of direct current high voltage flashover method and striking high voltage flashover method.
而随着电力电子技术的发展，建立在电力电缆分布参数理论基础上，出现了低压脉冲法与脉冲电流法，而脉冲电流法又分为直流高压闪络与冲击高压闪络两种方法。
The fast pulse high voltage DC power with star point modulate unit commutates with low voltage modulator solves the above problems, especially, the dip and overvoltag...
而高压滤波电感可以等效到低压星点处，使滤波电感绝缘等级低，通过提供电感续流通道给星点电感预充电，补偿了高压直流开关合分闸时负载电压跌落和过冲，降低电源动态内阻，加速了脉冲边沿动态响应过程，特别适用于需要快速响应脉冲高压电源的微波功率放大元件
To research the mechanism of high power supercontinuum generation by sub-nanosecond pulse pumping photonic crystal fiber, a 1.8 m PCF is pumped by 570 ps pulses from a Yb-doped mode-locked fiber laser, and it puts out SC with 1.15 W power and 750 nm spectral coverage.
研究了亚纳秒脉冲抽运光子晶体光纤产生高功率超连续谱的机理。采用掺镱锁模光纤激光器产生的脉宽570 ps光脉冲，抽运1.8 m光子晶体光纤，得到了平均功率为1.15 W、光谱覆盖范围为750 nm的超连续谱。
The ultra-short laser pulse technique is applied widely in research because of its extremely high time resolution and peak power.
飞秒量级的超短脉冲激光具有极高的时间分辨率及峰值能量，在许多领域都有非常重要的应用。
Quick stepper motor for high-frequency and smaller torque output, usually in the N cm level, can be used as the control of small precision machine tool table can also hydraulic and Amplifier of electro-hydraulic torque pulse CNC machine motor to drive the table, and the stepper motor power output is more torque on the N m-class, the machine can be driven directly to the moving parts.
快速步进电动机连续工作频率高而输出转矩较小，一般在N·cm级，可以作为控制小型精密机床的工作台也可以和液压转矩放大器组成电液脉冲马达去驱动数控机床的工作台，而功率步进电动机的输出转矩就比较大是N·m级的，可以直接去驱动机床的移动部件。
The IC also includes Pulse Frequency Modulation that operates in currents below 100mA, enabling the IC to provide high efficiency in all current ranges and reduce the power consumption of end equipment in stand-by mode.
新款IC亦包含可在低电流范围时发挥高效率的脉冲频率调变，并让设备在待机模式时可保持在低功耗状态。