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:
Dec. 28, 2004
Filed:
Jul. 23, 2002
Fabrice Breit, Plateau la Laurence, FR;
Sorin Dinculescu, rue Saint Antoine du T., FR;
Emmanuel Dutarde, rue de la Bareille, FR;
Thierry Lebey, rue Ritay, FR;
José Saiz, Rue Jacques Prévert, FR;
Alstom, Paris, FR;
Abstract
A method of testing a power module including a control gate, an emitter, a collector, at least one power component on a dielectric substrate and a diode connected in antiparallel with the power component measures partial discharges occurring between the emitter and the collector when an alternating current voltage source superimposed on a direct current voltage source is connected between the collector and the emitter of the power module. The voltage V received by the power module between the collector and the emitter verifies at all times the condition V >0 so that the diode never conducts. The power component is maintained in a turned off state during the test by a direct current voltage source connected between the control gate and the emitter.