hard-switchの例文
- 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
- 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
- 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
- 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
- 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
