Patent · US Expired

Process for detecting abutment and blocking in an electric motor

US6150782A · kind A · utility

9Cited by

4References

4Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfram Breitling · Sachsenheim, DE
Juergen Munz · Leinfelden, DE
Harald Eisenhardt · Rutesheim, DE

Key dates

Filing date	Aug 23, 1999
Grant date	Nov 21, 2000
Priority date	—
Expiry date	Aug 23, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S388/903
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a stop and jamming detection system in an electric motor, in particular a stepping or commutator motor, a parameter is determined by current measurement, from the profile of the instantaneous current by comparison with a reference value, as a signal for the stop and jamming detection system. In addition to sensing the current flowing through a winding of the motor, the instantaneous operating voltage and the resistance of the motor winding are sensed. All three parameters are conveyed to an analysis circuit. By comparison with reference values, a determination is made by the analysis circuit as to whether the motor is jammed or movable. Reliable and economical stop and jamming detection system for an electric motor, which is used in particular in a wide variety of operating conditions in motor vehicles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.