Investigations of SiC MOSFET Short-Circuit Failure Mechanisms Using Electrical, Thermal, and Mechanical Stress Analyses

2020 ◽  
Vol 67 (10) ◽  
pp. 4328-4334
Author(s):  
Kailun Yao ◽  
Hiroshi Yano ◽  
Hiroshi Tadano ◽  
Noriyuki Iwamuro
Keyword(s):  
Mechanical Stress ◽  
Short Circuit ◽  
Failure Mechanisms ◽  
Stress Analyses

Short Circuit Failure Mechanisms of 650-V GaN/SiC Cascode Devices in Comparison with SiC MOSFETs

2021 ◽  
pp. 1-1
Author(s):  
Jiahui Sun ◽  
Kailun Zhong ◽  
Zheyang Zheng ◽  
Gang Lyu ◽  
Kevin J. Chen
Keyword(s):  
Short Circuit ◽  
Failure Mechanisms

Failure mechanisms of enhancement mode GaN power HEMTs operated in short circuit

2019 ◽  
Vol 100-101 ◽  
pp. 113454 ◽  
Author(s):  
C. Abbate ◽  
G. Busatto ◽  
A. Sanseverino ◽  
D. Tedesco ◽  
F. Velardi
Keyword(s):  
Short Circuit ◽  
Failure Mechanisms ◽  
Enhancement Mode

scholarly journals Investigation of short-circuit failure mechanisms of SiC MOSFETs by varying DC bus voltage

2018 ◽  
Vol 57 (7) ◽  
pp. 074102 ◽  
Author(s):  
Masaki Namai ◽  
Junjie An ◽  
Hiroshi Yano ◽  
Noriyuki Iwamuro
Keyword(s):  
Short Circuit ◽  
Failure Mechanisms ◽  
Dc Bus ◽  
Bus Voltage

Computation of Radial Electromagnetic Forces on Power Transformer LV Windings due to Short-Circuit Currents

2013 ◽  
Vol 732-733 ◽  
pp. 1069-1073 ◽  
Author(s):  
Han Bo Zheng ◽  
Jin Hua Han ◽  
Wei Wang ◽  
Xiao Gang Li ◽  
Yu Quan Li
Keyword(s):  
Mechanical Stress ◽  
Case Studies ◽  
Calculation Method ◽  
Electromagnetic Force ◽  
Radial Direction ◽  
Low Voltage ◽  
Power Transformer ◽  
Short Circuit ◽  
Leakage Flux ◽  
Short Circuit Currents

The short-circuit electromagnetic force in radial direction induces critical mechanical stress on a power transformer. In this paper, the radial short-circuit forces which are exerted on transformer low voltage (LV) windings are investigated. Firstly, the mechanisms of leakage flux and short-circuit electromechanical forces in transformer coils are analyzed. Afterwards, based on IEC standards followed by short-circuit tests, calculations of radial short-circuit forces and evaluations of the ability to withstand short currents in LV windings are developed. The case studies and comparisons with improved measures show that the evaluation and calculation method is feasible and effective, and this method also offers three useful ways to strengthen the ability to withstand short-circuit currents for transformer windings.

scholarly journals Mechanical-Stress Analytical Modeling for the Design of Coils in Power Applications

2014 ◽  
Vol 63 (4) ◽  
pp. 579-590
Author(s):  
D. Bellan
Keyword(s):  
Power Systems ◽  
Mechanical Stress ◽  
Short Circuit ◽  
Electrical Power ◽  
Short Circuit Current ◽  
Geometrical Parameters ◽  
Electrical Power Systems ◽  
Inrush Currents ◽  
Current Flows ◽  
The Relationship

Abstract Modern electrical-power systems are often exploited for transmitting high-frequency carrier signals for communications purposes. Series-connected air-core coils represent the fundamental component allowing such applications by providing a proper filtering in the frequency domain. They must be designed, however, to withstand also the line short-circuit current. When a high-magnitude current flows through a coil, strong mechanical stresses are produced within the conductor, leading to possible damage of the coil. In this paper, an approximate analytical model is derived for the relationship between the maximum mechanical stress and the electrical/geometrical parameters of the coil. Such a model provides the guidelines for a fast and safe coil design, whereas numerical simulations are only needed for the design refinement. The presented approach can be extended to other applications such as, for example, the mechanical stress resulting from the inrush currents in the coils of power transformers.

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