Patent · US Active

Method and device for detecting blocking or sluggishness of a DC motor

US8922149B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Thomas Malich · Kappelrodeck, DE
Volker Lurk · Offenburg, DE
Gerald Roos · Achern, DE
Nikolas Haberl · Baden-Baden, DE
Frank Fischer · Mesa, US
Christian Poddey · Besigheim, DE
Michael Koerner · Laufenburg (Baden), DE
Jan Van Goethem · Gernsheim, DE
Daniel Hofacker · Achern, DE
Tobias Stiefel · Baden-Baden, DE

Key dates

Filing date	Jan 25, 2011
Grant date	Dec 30, 2014
Priority date	—
Expiry date	Jun 10, 2031

Classification

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

Abstract

The invention relates to a method for detecting blocking or sluggishness (M1, M3) of a DC motor (2). The method comprises the following steps: applying a voltage pulse (Uv,t=Os) to the DC motor (2); monitoring a motor current (IMotor) flowing through the DC motor (2); detecting a maximum value of the motor current (IMotor) following the application of the voltage pulse; checking whether a change in the motor current (IMotor) after reaching the maximum value exceeds a specific amount; signalling the blocking or the sluggishness (M1, M3) of the DC motor (2) if the change in the motor current (IMotor) after reaching the maximum value exceeds the specific amount.

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