Patents by Inventor Gottfried Juergen Gutsche

Gottfried Juergen Gutsche 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).

  • Patent number: 5764021
    Abstract: A method and device are disclosed for speed control of an AC induction motor by means of a control circuit which generate a motor drive voltage consisting of a combination of AC and time-spaced DC pulses. During the occurrence of the time-spaced DC pulses in the motor's AC drive voltage a back EMF suppression network is activated to absorb the motor's generated back EMF energy. A further feature of the invention is a slow down mode where the motor is decelerated from continuous full cycle AC to a requested slow speed setting by means of a higher contend of DC pulses in the AC drive voltage.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: June 9, 1998
    Assignee: Gottfried Gutsche
    Inventor: Gottfried Juergen Gutsche