Patents by Inventor Joachim Waschkies

Joachim Waschkies 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).

  • Motor control system for the PWM control of an electric motor
    Patent number: 7589490
    Abstract: The subject of the present invention is a motor control system having a monitoring circuit for monitoring PWM control for a DC electric motor, the PWM control comprising a power end stage having at least one field effect transistor, which controls the current at the DC electric motor. The motor control system is designed to monitor the current at the DC electric motor. The motor control system detects the voltage drop across the field effect transistor and comprises a temperature sensor for detecting the temperature of the field effect transistor. Furthermore, the motor control system is designed to determine the resistance of the field effect transistor from the detected temperature thereof, and to determine the current at the DC electric motor from the resistance of the field effect transistor and from the voltage drop across the field effect transistor.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: September 15, 2009
    Assignee: Ford Motor Company
    Inventors: Achim Haesters, Bernd Dienhart, Joachim Waschkies, Guido Lindeke, Cornelius Peter, Angelika Peter, legal representative
  • Motor control system for the PWM control of an electric motor
    Publication number: 20080008459
    Abstract: The subject of the present invention is a motor control system having a monitoring circuit for monitoring PWM control for a DC electric motor, the PWM control comprising a power end stage having at least one field effect transistor, which controls the current at the DC electric motor. The motor control system is designed to monitor the current at the DC electric motor. The motor control system detects the voltage drop across the field effect transistor and comprises a temperature sensor for detecting the temperature of the field effect transistor. Furthermore, the motor control system is designed to determine the resistance of the field effect transistor from the detected temperature thereof, and to determine the current at the DC electric motor from the resistance of the field effect transistor and from the voltage drop across the field effect transistor.
    Type: Application
    Filed: June 19, 2007
    Publication date: January 10, 2008
    Inventors: Achim Haesters, Bernd Dienhart, Joachim Waschkies, Guido Lindeke, Cornelius Peter, Angelika Peter