SERVICE LIFE DIAGNOSTIC DEVICE AND POWER CONVERSION DEVICE

A service life diagnostic device includes a Vce amplifier, a Vee amplifier, and a service life diagnostic unit. The Vce amplifier measures a voltage between a collector main terminal connected to a collector electrode of a semiconductor element mounted on a semiconductor device, and an emitter main...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	WADA, Yukihiko
Format:	Patent
Sprache:	eng
Schlagworte:	MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	A service life diagnostic device includes a Vce amplifier, a Vee amplifier, and a service life diagnostic unit. The Vce amplifier measures a voltage between a collector main terminal connected to a collector electrode of a semiconductor element mounted on a semiconductor device, and an emitter main terminal connected to an emitter electrode of the semiconductor element. The Vee amplifier measures a voltage Vee between the emitter main terminal and an emitter reference terminal connected to the emitter electrode. The service life diagnostic unit diagnoses a service life of the semiconductor device using a correlation value between a temporal change of the voltage Vce and a temporal change of the voltage Vee.