Invention Grant
- Patent Title: Faulty load detection for multi-phase electric motor
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Application No.: US16414903Application Date: 2019-05-17
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Publication No.: US10768235B2Publication Date: 2020-09-08
- Inventor: Jörg Hartzsch
- Applicant: Elmos Semiconductor AG
- Applicant Address: DE Dortmund
- Assignee: Elmos Semiconductor Aktiengesellschaft
- Current Assignee: Elmos Semiconductor Aktiengesellschaft
- Current Assignee Address: DE Dortmund
- Agency: Bejin Bieneman PLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@34504eb4 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@29b48a39 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@e699244
- Main IPC: H02M1/32
- IPC: H02M1/32 ; H02P29/024 ; G01R31/34 ; G01R19/165

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.
Public/Granted literature
- US20190277915A1 FAULTY LOAD DETECTION FOR MULTI-PHASE ELECTRIC MOTOR Public/Granted day:2019-09-12
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