External and Internal Factors Influencing the Short Circuit of IGBTs and SiC-MOSFETs

Xing Liu (Autor)

Buch | Softcover

232 Seiten

2025
Universitätsverlag Chemnitz
978-3-96100-289-4 (ISBN)

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This work investigates the application-relevant short-circuit type II and III behaviours of discrete IGBTs and SiC-MOSFETs. Unlike the well-studied SC I, SC II and III involve complex dynamic processes, requiring a deeper physical understanding. External influencing factors such as gate driver design, gate resistance, package parasitics, and magnetic coupling are analysed experimentally, revealing their role in shaping gate voltage overshoot, current peaks, and induced overvoltages.Internally, TCAD simulations highlight the plasma effect in IGBTs, which significantly impacts current peak, decay dynamics, and self-turn-off risks. Additionally, a novel channel potential modification-induced displacement current (CPiC) mechanism is introduced as a contributor to gate voltage overshoot, complementing the classical Miller effect. The SC type III introduces IGBT-diode interactions. Moreover, plasma effects in high-voltage SiC-MOSFETs under SC III are shown for the first time, with implications for dead time and gate bias optimisation. Overall, this dissertation provides new insights into short-circuit physics and suggests methods to improve the ruggedness of IGBTs and SiC-MOSFETs in demanding applications.

Erscheinungsdatum	18.10.2025
Zusatzinfo	Illustrationen, Diagramme
Verlagsort	Chemnitz
Sprache	englisch
Maße	148 x 210 mm
Gewicht	342 g
Themenwelt	Technik ► Elektrotechnik / Energietechnik
Schlagworte	Halbleiterbauelement • IGBT • Kurzschluss • MOS-FET • Semiconductor Devices • short circuit • SiC-MOSFETs • SW1 • SW2 • SW3
ISBN-10	3-96100-289-4 / 3961002894
ISBN-13	978-3-96100-289-4 / 9783961002894
Zustand	Neuware