The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1992
Filed:
Nov. 30, 1990
Applicant:
Inventor:
Chihiro Okado, Fuchu, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 37 ; 363 56 ; 363 98 ;
Abstract
In a bridge type power converter, one of series-connected semiconductor elements of an inverter bridge is constituted by an MCT having a low-loss characteristic, or substantially constant-voltage characteristic, with a small voltage drop under conduction, and the other semiconductor element is constituted by an IGBT having a constant-current characteristic with a current suppressed in accordance with a drive signal. A failure current is suppressed by a current-suppressing effect of the IGBT and safely interrupted by turning off the MCT and the IGBT.