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The traditional RF-MEMS switch is proved to have high return wave loss and low stability in signal transmission. This paper adopts CST to study S parameter characteristics of the RF-MEMS switch and design a new structure switch based on photon crystal. The experiment shows that the new structure switch has excellent tranmission characterisitcs relative to the common structure. In the end, the switch...
This paper studies an fast calculating method of IGBT, then introduces several different PWM techniques in converters. It further compared the MVA rated three-phase IGBT converter's loss rates under different PWM means. Based on the lowest power loss, it presents the most desirable PWM method.
This paper describes an active voltage control for IGBT connected in series. The gate drive circuit not only amplifies the control signal, but also control the IGBT's dv/dt and over voltage during switching transient. This make the switching performance less dependent on IGBT itself. This paper provides a stability analysis to judge the controller stability. The experiment results show the IGBT voltage...
This paper proposes an improved method to describe power losses in IGBT converters. This method includes dependency of voltage, current and temperature, and it could be fast and accurate. Since the relative higher converter dissipation is one of the main barriers in high power applications, it is further compared the MVA rated three-phase IGBT converter's loss rates under different operating frequency,...
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