The main loop of the welder uses a thyratron transistor non - contact switch circuit , quick and reliable close time , accurate timing of welding , high precision of welding , good repeatability , bring a high quality welding 焊机主回路采用晶闸管无触点开关电路，关断时间快、可靠，焊接定时精确，焊接精度高，重复性好，可实现高品质焊接。
Aiming at the excessive high peak voltage , a simple lossless solution is adopted and a good effect is gained . base on this , the bias - magnetic experiment of ppf converter is carried out 针对实验过程中存在整流二极管关断尖峰大的问题,研究并采用了一种简单无损的尖峰抑制电路,取得了良好的效果,在此基础上对偏磁进行了部分实验验证。
If power shut suddent or turn off during the machine is runing , when restart it pls shut off the presure switch and put out all compress air in the store jar , afterward turn on the pressure switch to run the machina 本机器在运行中，如遇电源突然中断或关断，再次使用时应将压力开关关闭，并将储气罐内压缩空气排尽，然后再打开压力开关运行机器。 ”
This article has developed a method to lead through the examination crystal thyratron passing with shutting off , as well as the examination electrical network voltage synchronized signal , realizes the the 本文研制了一种通过检测晶闸管的导通与关断,以及检测电网电压同步信号,由87c196kc实现了异步电动机节能控制器的功率因数的检测,具有一定的创新性。
The accuracy of transfusion capacity and speed can be controlled . when there are some accidental situations during the transfusion , the equipment can stop the transfusion immediately in order to prevent the accident 而且能精确控制药液的输液量和输液速度,能对输液过程中出现的异常情况进行监测报警,同时及时自动关断输液通路,防止输液事故的发生。
Based on quasi - linear model of sr motor , the influences of angle on phase current , output power , energy loss are analyzed . an optimum result of angle is produced in accordance to given target 基于sr电机的准线性模型，本文分析了开通角和关断角与相电流、输出功率以及损耗之间的关系，并根据给定的优化目标，给出了该电机开通角和关断角的优化结果。
Green - mode which provides off - time modulation to linearly decrease the working frequency under light - load conditions and power limiting which will turn off the transistor when peak current of inductor reaches the threshold current 同时该电路集成了能在轻负载情况下自动降低频率的绿色模式以及能在电感峰值电流过高时关断调整管的功率限制模块,降低了系统的功耗。
The gips / gdps series of automatic shut - off valves are safety devices designed to stop the flow of gas when the downstream pressure of the valve reaches a value larger than and / or smaller than the preset operating limit 升压感应关断型?与gdps ?降压感应关断型?系列自动关断阀为安全设备，设计当此阀下游压力达到大于或?和?小于预定操作限度的压力值时，来中断瓦斯流动。
As the step - down transformer has no load when the scr is turned off , the system is stable during switching . less transformers , small area the device occupies , the relative simplicity of connection are the other advantages 这种补偿方案由于在晶闸管关断时降压变压器相当于空载，不存在暂态过程的不稳定问题；所用的变压器数目少；占地面积较少；接线相对较简单。
As the control core of the wielding power supply , outputs two pulses waveform . which is different from each other of their phase position . after the magnifying of the drive module m57959l , the output waveform can drive the igbt and control the 由tms320f2812dsp输出两路相位分别成180o反相的pwm脉冲波形,经过igbt专用驱动模块m57959l的驱动,来控制igbt的导通、关断。
