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Commercialization of 1200-V silicon carbide (SiC) MOSFET has enabled power electronic design with improved efficiency as well as increased power density. High-voltage spikes induced in applications such as solenoid control, solid-state transformer, boost converter, and flyback converter can drive the MOSFET into avalanche mode operation due to high di/dt coupled with parasitic inductance. Avalanche...
Currently, former DC supply systems reach their limits. In several European Railway networks, there are several sectors where it is not possible to operate locomotives at their nominal ratings or to increase traffic. Indeed, the line-voltage drops between substations leads to severe limitations. To improve the power capacity of the line, a three-wire supply system with voltage boosters based on Imbricated...
In this paper, we present for the first time, the experimental results of a “Bimode Cross Switch (BXS)-Hybrid” built with 3.3kV Silicon Enhanced Trench Bi-mode IGBTs (Si-ET-BIGT) and Silicon Carbide MOSFETs (SiC-MOSFET). Also, we have compared the static (on-state) and dynamic (switching) characteristics of the 3.3kV BXS-Hybrid (1 × Si-ET-BIGT + 2 × SiC-MOSFET) with the full SiC-MOSFET (4 × SiC-MOSFET)...
This paper investigates SiC power semiconductor devices in a three-phase active front-end Boost PWM rectifier for power conversion efficiency improvement. Different from Si IGBT based Boost PFC rectifier, the SiC MOSFET based Boost PFC rectifier can achieve the synchronous rectification by MOSFET channel reverse conduction for efficiency improvement. The operation principle difference of three-phase...
The expectation for SiC devices in advanced power electronics applications for saving energy has been still larger. The 4H-SiC planer MOSFETs with high blocking voltage (1300 V) and large current (40 A) were fabricated. In addition, we have succeeded in fabricating the larger current (300 A) 4H-SiC trench MOSFET with low-on resistance (2.6 mΩ cm2). And, regarding high-temperature operation, SiC IPMs...
Silicon carbide (SiC) MOSFET power devices are expected to replace silicon IGBTs in power electronics applications requiring higher efficiency and power density, as well as capability to operate at higher temperatures. This paper reports on the development of high efficiency SiC power MOSFETs, power modules and switching converters at GE. The prototype 30A, 1200V discrete devices have on-resistance...
Power devices fabricated in 4H-SiC are poised to significantly impact the field of power electronics. There has been great interest in SiC as a material in which to fabricate power electronic devices for quite some time based on its very promising fundamental materials properties. However, it has been far more recently that the potential of SiC is being appreciated as a result of the recent advances...
The 5×4.2 mm2 chip of the SiC DIMOSFET was fabricated and tested. The drain-source avalanche breakdown voltage without any gate bias (Vgs=0V) is measured to be >1000V. The drain current (Id) >40A is observe under the conditions of Vds=1V and Vgs=+20V. Typical Ron and specific Ron are measured to be 22 mΩ and 3.5 mΩcm2 with Vth=2.3V. The SiC DIMOSFET is introduced into the PE circuits of the...
It is important to understand the properties of SiC MOSFETs that should be optimized to enhance the performance of advanced power. In this paper, the authors quantify the impact of the specific on-resistance and switching loss on determining the device current rating of SiC MOSFETs. This analysis is based on DC and transient characterization of GE 1200 V SiC MOSFETs with specific on-resistance of...
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