hard-switch造句

• To dissolve the switching power supply electro magnetism pollution towards environment , soft - switching pwm mode has been used instead of hard - switching pwm mode and a pfc stage has been added normally
  消除开关电源对环境的电磁污染，一是要采用软开关的pwm调节方式，二是在输入端增加功率因数校正器，这是目前一般采用的办法。
• This paper researches the digital characteristics of the welding power supply and the main circuit of the full bridge high power soft - switching . nowadays , welding machines usually apply the hard - switching as the topology , which causes the problem of higher loss and lower efficiency
  目前焊接逆变电源所应用的大功率电路多采用硬开关电路,这样在功率器件导通和关断过程中会产生很大的损耗,并且随着逆变频率的提高,损耗会增大,这样就降低了焊机的效率。
• Switching loss and efficiency of the proposed resonant pole zvt three - phase pwm inverter are analyzed and discussed . results of calculation and testing of the prototype together with a hard - switching inverter with the same specification show that an improvement of 2 % ~ 3 % is obtained . based on the analysis of drawbacks of existing svpwm technique in resonant pole zvt three - phase pwm inverters , several improved svpwm methods are presented
  对提出的谐振极零电压过渡三相pwm逆变器的开关损耗和工作效率，进行了深入的分析和讨论，并针对原理样机进行了理论计算和实际测量，并与相同规格的硬开关三相逆变器进行了对比研究，结果表明，采用提出的软开关技术的原理样机的效率可以提高2 % 3 。
• What have made a large amount of harmonic and high electro - magnetic interference ( emi ) has two reasons . the first reason is mainly the hard - switching pwm mode . the switch turns on at high voltage and turns off at high current in a short time ( ns ) , which leads to a high du / dt and di / dt and emi
  其原因一是由于硬开关的pwm调节方式，电子开关速度很快( ns数量级)在高电压下导通，大电流下关断，导致很高的du dt和di dt ，产生很强的尖峰脉冲，对周围环境造成电磁干扰。
• The problem is much more critical when the inverter frequency is high . in a welding machine , the main circuit with the technology of the soft - switching is much idealer than the hard - switching . firstly of all , by the theory of the soft - switching , this paper relatively analysis the advantages of the soft - switching and , with the help of the simulation software pspice , analyzes the main circuit of the full bridge shift - phased zero voltage zero current ( zvzcs ) soft - switching
  结合软开关实现原理,本文首先对比分析了软开关在提高效率、降低emi干扰等方面的技术优势,通过pspice软件仿真,分析研究了全桥移相零电压零电流( zerovoltagezerocurrent - - - - zvzcs )软开关电路,详细介绍了该电路的软开关实现过程,并给出了电路模型和关键元件的设计参数。