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:
Sep. 08, 2020
Filed:
May. 17, 2019
Elmos Semiconductor Ag, Dortmund, DE;
Jörg Hartzsch, Dortmund, DE;
Elmos Semiconductor Aktiengesellschaft, Dortmund, DE;
Abstract
A method for obtaining an indication of a faulty load condition of a multi-phase electric motor includes: (a) starting, a time measurement unit, (b) measuring a recirculation time interval for as long as a current that continues to flow has a magnitude larger than a threshold value, (c) continuing, in case the recirculation time interval is not terminated during the switch-off interval, the time measurement at least in a next switch-off interval, (d) repeating, for additional switch-off intervals the steps (a), (b), and (c) for respective motor phases, (e) comparing (1) the measured recirculation time intervals for respective motor phases with each other and/or (2) for one motor phase in sequential succession with each other and/or (3) with the expectation value of the respective motor phase, and (f) determining, based on a deviation, the indication of the faulty load condition.