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:
Apr. 16, 2019
Filed:
Jun. 24, 2016
Abb Oy, Helsinki, FI;
Jukka-Pekka Sjoroos, Brookfield, WI (US);
Kari Tikkanen, New Berlin, WI (US);
ABB Schweiz AG, Baden, CH;
Abstract
Monitoring aging in an electric drive system includes energizing the electric drive system such that electrical current flows through a power semiconductor device therein, determining a value indicative of a voltage across the power semiconductor device, at a current level where voltage is substantially independent of temperature, comparing the determined value with a reference value, and outputting a signal responsive to a difference between the values that is indicative of an aging state of the power semiconductor device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile