Leistungsmodulgesundheitsüberwachung durch Periodische Gatestrominjektion mit Variabler Dauer

Details

Veröffentlichungs-Nr.

EP4582819

Aktenzeichen

EP24305034

Anmeldetag

8. Januar 2024

Veröffentlichung

9. Juli 2025

Rechtsraum

EP

IPC

G01R31/26G01R31/28G01K7/01

Abstract

The present disclosure concerns a method for measuring a degradation of thermal characteristics of a power module comprising sequences of: - injecting current pulses (P<inj>), having a voltage-clamped constant amplitude (I<inj>), between an emitter and a gate of a power semiconductor of such power module, a duration of said voltage-clamped constant amplitude (I<inj>) current pulses (P<inj>) being modulated periodically with a modulation frequency (F<mod>), said current pulses causing losses modulated with said modulation frequency (F<mod>), - measuring a parameter (k Tj) dependent of a junction temperature (Tj) of such power semiconductor at the beginning of said current pulses, - measuring a phase shift (Δφ) between said modulation frequency (F<mod>) and said parameter (k·Tj), said phase shift (Δφ) providing a health indicator for the power module.

Anmelder

Firmen

Mitsubishi Electric R&D Centre Europe B.V.
MITSUBISHI ELECTRIC CORPORATION

Land

🇳🇱 Niederlande

Fachgebiete