For the inverter control circuit , the simulation model of 74hc4046 is established . two pulse signals can be obtained by forming dead time , which are used to drive the switching devices 对于逆变控制电路，本文建立了基于74hc4046的仿真模型，通过死区形成环节得到两路触发信号，去驱动主电路的开关器件。
Modern power inverters provide the industrial control industry with significant advantages , especially the faster switching devices of pulsewidth modulated ( pwm ) inverters have increased drive performance 现代变流技术为工业控制提供了?种完美的方案，尤其是pwm变频器的高频率开关大大提高了交流电动机的调速性能。
Y . r . yang , c . l . chen , " analysis of self - excited electronic ballasts using bjts / mosfets as switching devices , " iee proceedings - circuits , devices , and systems , vol . 145 , no . 2 . pp . 95 - 104 , april 1998 杨岳儒，陈秋麟，林昌贤“变流器辅助电源之设计及制作”工研院能资所电力电子技术双月刊，第18期，第11 - 23页， 1993年12月。
This paper introduces the operation principle of ac voltage stabilizer and analyzes in detail the existing problems of thyristor used as switching device and proposes the methods for solving these problems 介绍了所研制的新型无触点电力稳压源的基本工作原理，详细分析了作为开关器件的晶闸管在使用过程中存在的一些问题及解决方法。
Compared with the traditional open type switching device , gis has massive comprehensive superiority in technological economy : lit is of small bulk and because of this the proportion of the room is largely reduced 与传统敞开式开关设备相比， gis在技术经济上有不可比拟的综合优势： 1 gis设备体积小，能大大减少配电装置的占地和占用空间比例2
The simulation results confirm that the control method is very effective in optimizing the frequency of switching devices , balancing the neural point voltage of three - level inverter , and improving drive system performance 通过仿真研究，该方法既能优化功率器件的开关频率，同时又有效抑制了三电平逆变器中点电压的偏离，提高了传动系统的整体性能。
The products mentioned are widely used in such fields as machinery , automobiles , aviation , watercrafts , railway locomotives , switch devices , elevators , air - conditioners , construction , cases and bags , furniture , kitchen , leisure articles , etc 公司产品广泛应用于机械、汽车、航空、船泊、铁道机车、配电开关装置、电梯、空调、建筑、箱包、家俱、炊具及休闲用品等领域。
Capacitor bank switching is one of the most rigorous working conditions that medium - voltage switchgears face . because of their excellent general performances , the vacuum switching device is regarded as the first choice equipment of capacitor bank operating switches 投切电容器组是中压开关设备所面临的最严酷的工况之一,真空开关因其优良的综合性能被当作电容器组操作开关的首选设备。
The second chapter introduces the essence of the switched ethernet and the switch devices , import the definition of the smart switch , point out the position of our broadband access switch sw1000 in the whole system , and make the partition of the logic modules 第二章介绍交换式以太网和交换机的工作原理，引入智能交换机概念，介绍sw1000在整个系统中的地位，给出了逻辑功能模块的划分。
The common mode voltage has high abrupt transformation rate because of the fast switching devices , whose dv / dt can exceed 6000 v / us . under so high dv / dt , the oil film acts as a capacitor and provides a charging mechanism for rotor shaft voltage buildup 由于变频器的高开关频率，导致共模电压具有很高的电压变化率，其dv dt可以达到6000v us以上，在如此高的电压变化率下，润滑油膜充当了电容的作用对转轴进行充电，形成轴电压。
