Patents by Inventor Micheal Hermann

Micheal Hermann 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).

  • Apparatus and method for controlling brushless electric motors and position encoders and indicating position thereof
    Patent number: 5280222
    Abstract: A brushless direct current motor is energized by a power stage. Switches of the power stage are selectively switched by an electronic control device. In order to determine the correct commutation pattern, without using rotor position indicators such as Hall effect devices, the control device is arranged to sample the power fed to the motor. The samples, each responsive to a test signal or normal energization pulses received by the motor, in a ordered sequence define an analogue function whose parameters can be determined by mathematical analysis. The analysis applied to the samples derives the necessary commutation information and the energization signals in a rapid manner by employing a vector or complex number addition based on functions dependent on variable inductance in the operation of the motor.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: January 18, 1994
    Assignee: Papst Motoren GmbH & Co. KG
    Inventors: Johann von der Heide, Uwe Muller, Micheal Hermann
  • Apparatus and method for controlling brushless electric motors and position encoders and indicating position thereof
    Patent number: RE39076
    Abstract: A brushless direct current motor is energized by a power stage. Switches of the power stage are selectively switched by an electronic control device. In order to determine the correct commutation pattern, without using rotor position indicators such as Hall effect devices, the control device is arranged to sample the power fed to the motor. The samples, each responsive to a test signal or normal energization pulses received by the motor, in a ordered sequence define an analogue function whose parameters can be determined by mathematical analysis. The analysis applied to the samples derives the necessary commutation information and the energization signals in a rapid manner by employing a vector or complex number addition based on functions dependent on variable inductance in the operation of the motor.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: April 25, 2006
    Assignee: Papst Licensing GmbH & Co. KG
    Inventors: Johann von der Heide, Uwe Muller, Micheal Hermann