The system can display out voltage and out current . 80c198 microcomputer is used as the control circuit of this power source . the serial voltage regulate technology , high frequency switch technology and scr pre - regulate technology are adopted in the main circuit 电源的控制电路选用80c198单片机为核心，主电路采用线性串联调整稳压技术、高频开关技术和可控硅预稳压技术。
Established in 1997 , siemens medium voltage switching technologies ( wuxi ) ltd . ( former siemens vacuum interrupters ( wuxi ) ltd . ) is a joint venture between siemens ag , germany and wuxi electronics and instruments industry corp 成立于1997年11月的西门子中压开关技术(无锡)有限公司(原西门子真空开关管(无锡)有限公司) ，是由西门子输配电集团与无锡市电子仪表工业公司共同投资的合资企业。
A new control method , which can reduce the switching number of times of auxiliary switches to one half , is put forward . the new approaches are verified by experimentation . a generalized method to design a soft - switching vvvf is also discussed in the end 此外，还提出了一种软开关技术变频器的具体设计方法，该设计方法具有一般性，可以推广应用到不同容量的软开关变频器设计中。
It consists of forward stage and backward stage , of which the forward stage is a single - phase boost power factor correction circuit using ic uc3854 . the backward stage main circuit is a full - bridge converter using phase - shifting control soft - switching technique 该开关电源分为前级和后级，前级为采用boost结构的单相有源功率因数校正电路，后级为采用移相控制软开关技术的全桥变换器。
Passive measure include : filter , fielding , earthing , bypass , decoupling etc . positive measure have resonant switching modulation ( include soft switching modulation ) , random switching modulation and chaotic switching modulation which be studied in this thesis 从源头上减小电磁干扰的方法有：各种谐振开关技术(包括软开关技术) 、随机开关调制技术、以及本文研究的混沌开关调制技术等。
So it can reduce on and off loss of switches . during the analysis of this kind soft switching inverter , simple resonant principles are talked about firstly . analyzing the work principles , advantage and something need to rectify for different topologies 在分析这一类型的软开关技术变换器时,本文从简单的谐振原理出发,根据各种不同类型的拓扑结构,分析其工作原理、存在的优点以及待改进的地方。
A new technology based on molecular logic gates , jointly developed by hp labs and ucla , can store vast amounts of data permanently , yield a 100 billion reduction in power consumption , and put 100 workstations on the size of a grain of sand 一件hp研究室及ucla大学合作发展出来耶分子开关技术,有法度永远记录足侪资料、比今阿日耶技术省电一千亿倍、一粒沙遐细粒仔囝耶晶体有法度代替今阿日一百台工作站型电脑耶计算能力。
Multilevel converters and soft switching technology together with their applications in dc / dc field are introduced in this thesis . taking buck as the example , the operation principle and process of non - isolated three - level dc / dc converters are analyzed and discussed with calculation 本文对多电平和软开关技术及其在直流变换领域的应用进行了介绍，并以buck电路对例，对三电平非隔离直流变换电路的工作原理和过程进行了分析、计算与讨论。
2 . we present a novel de - rail parallel resonant zero voltage transition three - phase pwm voltage - source inverter which is based on resonant zero voltage ( zero current ) transition technique ; at the same time it ' s efficiency analysis and simulation result are presented . 3 把谐振过渡软开关技术应用于直流环节逆变器得到了一种新的谐振过渡软开关逆变器；论文对该新型谐振过渡软开关逆变器进行了工作原理、效率分析并对主电路进行了仿真。
The paper analyzed the working principle and gave an example of application in color television , for quasi - resonant is a good solution for improving the efficiency of power supply of color television , proving it is an ideal choice for superior big screen color television in the future 摘要提高彩电开关电源效率，准谐振软开关技术是很好的解决方案，分析了这种技术的工作原理，给出了在彩电中应用示例，结果证明它是未来高档大屏幕彩电电源的理想选择。
