Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode
Reexamination Certificate
2006-01-25
2010-12-14
Louie, Wai-Sing (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Field effect device
Having insulated electrode
C257S048000
Reexamination Certificate
active
07851866
ABSTRACT:
An object of the present invention is to provide an electric power converter including means for accurately detecting a principal current of IGBT. An electric power conversion device according to the present invention includes principal current estimation means for estimating a principal current by using: an output of temperature measuring means whose diode is disposed in the same semiconductor substrate as an IGBT including an emitter having flowing therethrough the principal current and a sense emitter having flowing therethrough a sense current proportional to the principal current; the sense current; and the information, preliminarily stored in memory means, on the relationship among the semiconductor substrate temperature, the principal current and the sense currant.
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Mori Mutsuhiro
Sakurai Naoki
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Jahan Bilkis
Louie Wai-Sing
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