Title:
過電圧を制限する方法および回路構成
Document Type and Number:
Japanese Patent JP3917156
Kind Code:
B2
Abstract:
In order to limit an overvoltage at a parallel circuit of IGBT ( 3 ) and freewheeling diode ( 7 ), an undesirable current spike is used to switch on the intrinsically turned-off IGBT ( 3 ') during the presence of the current spike precisely to an extent such that a current which counteracts the overvoltage arises in the IGBT/freewheeling diode pair. The oppositely acting current reduces the current gradient in leakage inductances (Lsigma) and reduces the undesirable induced overvoltages.
Inventors:
Münzer, mark
Bayerer, Reinhold
Kanshato, peter
Bayerer, Reinhold
Kanshato, peter
Application Number:
JP2004520416A
Publication Date:
May 23, 2007
Filing Date:
June 25, 2003
Export Citation:
Assignee:
Eupeque Europeche Gezelshaft Fure Rice Tungshall Plitter Mbeher
International Classes:
H02M1/00; H02H7/12; H02H9/04; H02M1/32; H02M7/48; H03K17/082; H02H7/08; H02M1/088
Domestic Patent References:
| JP2000245137A | ||||
| JP8162929A | ||||
| JP2001238431A | ||||
| JP10248237A | ||||
| JP2001245466A | ||||
| JP10150764A | ||||
| JP11055936A |
Foreign References:
| US4679112 | ||||
| DE4038199A1 |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office
Kenzo Hara
Ryuichi Kijima
Ichiro Kaneko
Kenzo Hara
Ryuichi Kijima
Ichiro Kaneko
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