A Study on the Improved Stability of Inverter through History Management of Semiconductor Elements for Power Supply

Abstract

Abstract. This study suggested the methods to check a proper replacement time, etc. by managing operation data of IGBT used as switching element of inverter for improving the stability of inverter, which was checked through practical experiment. This study accumulated and recorded data such as operation time of IGBT and temperature of radiator for the use in setting, etc. of proper replacement time by checking the data through an indicator. Methods and systems suggested in this study will be also easily used in various sectors using other electric system and semiconductor switching elements for power.

Optimized Design for Electric Vehicle Quick Charging System in Consideration of Economic Feasibility

“…Equation (4) shows the voltage controller including the feed forward compensator and Figure 6 shows the control block diagram. Here, f k refers to the feed forward compensator gain wherein the optimal value is determined through the frequency response characteristic of the output voltage with regards to the load current.…”

“…Also, the development of electric vehicles has taken a serious roll as the Californian government (CARB) passed the ZEV (Zero Emission Vehicle) regulation in 1998 that obliges the use of electric vehicles. Many still agree that the electric vehicles are the solution for air pollution due to automotive emission and it is expected that the endeavor in their development will continue [3][4][5].…”