US Patent 7348684 Drive unit

Patent 7348684 was granted and assigned to BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT on March, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73486840

Patent Inventor Names

Torsten Franke0

Date of Patent

March 25, 2008

Patent Application Number

111945490

Date Filed

August 2, 2005

Patent Primary Examiner

‌

Joseph Waks

Patent abstract

A drive unit is provided including a synchronous machine, a pulse counter unit for detecting a rotor position during the running operation of the synchronous machine, and a control unit. The control unit is constructed such that, with the start of the operation of the synchronous machine, the stator winding of the synchronous machine is energized such that the rotor aligns itself corresponding to a magnetic preference direction parallel to the direction of the magnetic stator field generated by the energizing. In addition, the pulse counter unit is set to a defined starting value.