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. 06, 2016
Filed:
Apr. 11, 2012
Antoine Chabaud, Tamm, DE;
Martin Frey, Lichtenstein, DE;
Sven Finke, Stuttgart, DE;
Frank Sader, Königstein, DE;
Markus Vogel, Gerlingen, DE;
Antoine Chabaud, Tamm, DE;
Martin Frey, Lichtenstein, DE;
Sven Finke, Stuttgart, DE;
Frank Sader, Königstein, DE;
Markus Vogel, Gerlingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An electronically commutated electric motor includes a stator and a rotor formed as a permanent magnet. A control unit is connected to the stator and configured to energize the stator to produce a rotating magnetic field. The electric motor further includes at least one Hall sensor configured to detect at least a magnitude of a sensor magnetic field produced by a sensor magnet connected to the rotor. The electric motor also includes at least one magneto resistive sensor configured to detect an alignment of a total magnetic field during a rotor revolution of the rotor and to generate a rotor position signal representing this alignment. The total magnetic field includes the sensor magnetic field and an interference magnetic field superimposed thereon. The control unit is further configured to determine the rotor position of the rotor at least depending on the alignment of the total magnetic field.