High frequency pulse width modulation power control systems can be realized using semiconductor switches.
高频脉冲宽度调制电力控制系统，可以实现用半导体开关。
High frequency pulse current machining and fine finishing can improve parts' machining accuracy and surface quality.
高频脉冲电流加工及光整加工技术能提高零件的加工精度和表面质量。
A kind of high frequency pulse electrical source at the need of electromagnetic ultrasonic experiments is presented.
针对电磁超声实验对脉冲电源的需求，研制了一种高频脉冲电源。
In the paper, the high frequency pulse tube coolers (PTCs) developed for 80 K and below temperature application are introduced.
首先介绍了作者开发的可用于80K及以下温区的高频脉冲管制冷机。
Experiment investigation on multi-bypass and fixed phase shifter comparison in single-stage high frequency pulse tube cryocooler;
本文采用数值模拟和实验研究的方法对高频脉冲管制冷机的重力特性进行了对比研究。
The results show that high frequency pulse electric current can refine and crinkle graphite flake, decrease the dimension of eutectic cell.
实验结果表明，在高频脉冲电流作用下铸铁石墨片细化，石墨片变得卷曲，共晶团尺寸减小。
The steady principle of the inverter with a high frequency pulse AC link and the unipolarity phase shifting control strategy are investigated.
该文深入分析研究了高频脉冲交流环节逆变器稳态原理特性与单极性移相控制策略。
The voltage force at a certain frequency, which is generated from a high frequency pulse power supply, is enforced to the two electrodes of the vacuum stove.
这就需要一个高频脉冲电源对真空炉的两个电极施加一定频率的电压场。
A circuit topology family of inverters with high frequency pulse AC link and a double polarities phase-shifting control strategy are proposed and deeply investigated.
提出并深入研究了高频脉冲交流环节逆变器电路拓扑族及其双极性移相控制策略。
Matching characteristics among linear compressor, regenerator, pulse tube and inertance tube have large impact on the performance of high frequency pulse tube cryocooler.
线性压缩机、回热器、脉冲管以及惯性管的耦合特性对高频脉冲管制冷机的整机性能有很大的影响。
A circuit topology family of inverters with high frequency pulse AC link and a double polarities phase shifting control strategy are proposed and deeply investigated in this paper.
提出并深入研究了高频脉冲交流环节逆变器电路拓扑族及其双极性移相控制策略。
When applied high frequency pulse current on CC. billet, the centerline pipe and centerline crack in billet are eliminated, and the central segregation and middle crack are improved.
用高频电场处理连铸小方坯，可以消除铸坯中心缩孔和中心裂纹。改善中心偏析和中间裂纹。
Use single stage version to reach the temperature of 20 K is a difficulty for high frequency pulse tube cooler (PTC). Multi-stage version is a popular method to reach the low temperature.
单级高频脉冲管制冷机直接降低到20K以下温区存在很大困难，采用多级方案是高频脉冲管制冷机获得更低温度的主要方法。
When high frequency pulse current is applied to CC billet, the centerline pipe and centerline crack in the billet are eliminated, and the central segregation and central crack are reduced.
进行了连铸工业试验，效果明显：铸坯中心缩孔和中心裂纹被消除，中心偏析和中间裂纹也得到降低。
Brazing quality and product reliability are both increased as using high frequency pulse microplasma arc heating process for assembly brazing of cathode and photoetching grid of electron tube.
采用高频脉冲微束等离子弧做为电子管阴极和光刻栅极装配钎焊工艺的热源，提高了钎缝质量和产品的可靠性。
For improving the SNR and the reducing transmit power of the SAR simultaneously, airborne SAR often use high PRF (Pulse Repetition Frequency).
机载SAR为提高信噪比并同时减少发射功率，往往使用较高的脉冲重复频率(PRF)。
The remote control device crystal frequency stabilization using pulse amplitude modulation transmitter, A simpler circuit, high frequency stability, launched 28MHZ are continuous carrier amplitude.
该遥控装置采用晶体稳频脉冲调幅发射机，电路较简单，频率稳定度高，发射的是间断的28MHZ等幅载波。
An improved plan of silicon controlled rectifier (SCR) line type trigger is described in detail. Anew practical circuit of bipolar transistor trigger for high pulse repeat frequency is presented.
详细地介绍了可控硅整流器(SCR)线型触发器的改进型设计方案，提出了用于高脉冲重复频率的双极晶体管触发器的实用新电路。
For a Doppler radar homing seeker with high pulse repetition frequency, the continuous wave approximation is not only simple, but also has a high calculation accuracy.
对于使用高脉冲重复频率的主动多普勒雷达导引头，连续波近似法不仅计算相对简单，而且可以给出较高的计算精度。
It is indicated from the results that effected by the high frequency group pulse power, higher machining quality is obtained by choosing higher main pulse frequency.
结果表明，在高频群脉冲电源作用下，选择较高的主脉冲频率，可获得良好的加工质量。
A novel drive system with high frequency AC pulse density modulation for electric vehicles is proposed, and its operation principle and control method are studied in detail.
提出了一种用于电动汽车的高频交流脉冲密度驱动系统并阐述了系统的工作原理和控制方法。
This paper discusses the theory analysis and circuit design of high-frequency high power source which is modulated by narrow pulse.
本文对窄脉冲调制的高频大功率源进行理论分析和电路设计。
Meanwhile, PWM inverters using high switching frequency device that shortens the rise time of PWM output pulse have been widely applied in high-speed AC driving locomotive.
同时，高速交流传动机车广泛采用高开关频率器件的脉宽调制（PWM）逆变器，使得逆变器输出脉冲具有陡上升沿。
The rational harmonic mode-locking has become a research subject of intense interest due to its application on the generation of ultra- high repetition frequency optical pulse train.
有理数谐波锁模技术是产生高速超短脉冲的重要技术之一，其光时分复用通信技术等领域中有重要的应用价值。
The practice proves that this circuit is effective for separation of high-frequency square wave signals and peak pulse interference signals.
实践证明：该电路能有效地实现高频方波信号与尖峰脉冲干扰信号的信噪分离。
Ultra high voltage + Ultra high frequency + Ultra high pulse: Please choose Amazing Capacitor.
超高电压+超高频率+超高脉冲：就选美志电容。
Functional relations between measured linewidth and optical parameters, structural parameters, oscillator coil and high-frequency rectangular pulse Numbers have been derived in the paper.
推导了被测线宽与光学性能参数，结构参数，振荡频率以及高频矩形脉冲数之间的函数关系式。
This pape studies the optimum design theory and practice of hight frequency high-power pulse transformer of arc welding inverter.
从理论和实践上探讨了弧焊逆变器的高频脉冲功率变压器的优化设计。
This paper will analyze the discharge high-frequency pulse theory and its application in JiangJin Power Supply Bureau's project.
对放电高频脉冲检测原理的装置进行了分析，并在重庆电力公司江津供电局工程中进行了应用。
The PP-IP characteristics at low frequency high pulse current and the emission spectra at direct current have been investigated and analyzed.
研究和分析了它们在低频大电流脉冲注入下的Pp—Ip特性和直流注入下的光谱特性。
应用推荐