Patents by Inventor Bernd Hexamer

Bernd Hexamer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and device for operating a synchronous machine
    Patent number: 8198840
    Abstract: According to the invention, estimated values (id (EST), iq (EST)) of the motor currents of a synchronous machine are determined by an observer in a co-ordinate system that rotates together with a rotor, independently of the target values (ud, uq) of electric voltages of the synchronous machine (PMSM) in the co-ordinate system that rotates with the rotor.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: June 12, 2012
    Assignee: Continental Automotive GmbH
    Inventor: Bernd Hexamer
  • Method and Device for Operating a Synchronous Machine
    Publication number: 20090206780
    Abstract: According to the invention, estimated values (id (EST), iq (EST)) of the motor currents of a synchronous machine are determined by an observer in a co-ordinate system that rotates together with a rotor, independently of the target values (ud, uq) of electric voltages of the synchronous machine (PMSM) in the co-ordinate system that rotates with the rotor.
    Type: Application
    Filed: January 17, 2007
    Publication date: August 20, 2009
    Applicant: Continental Automotive GmbH
    Inventor: Bernd Hexamer
  • Method and apparatus for controlling a brushless DC motor
    Publication number: 20050046371
    Abstract: Below a predetermined threshold value of the rotation speed, a sinusoidal or trapezoidal current is applied to the winding sections of a brushless DC motor. Above the predetermined threshold value of the rotation speed, the brushless DC motor is operated with block commutation. The brushless DC motor thus produces a very uniform torque over a very wide operating range, and can at the same time be designed to be very compact.
    Type: Application
    Filed: May 19, 2004
    Publication date: March 3, 2005
    Inventors: Martin Degen, Reiner Grossmann, Bernd Hexamer, Heiko Jausel, Werner Weiss