Patents by Inventor Benny Ljunggren

Benny Ljunggren 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 a device for charging a battery
    Patent number: 6677731
    Abstract: A device for charging a battery comprises an alternating current source, a rectifier being connected with its input to the alternating current source and being connected with its output to the battery for charging thereof. It also has a member for measuring the charging current from the rectifier to the battery and a means (13) for comparing the measured charging current with a current limit value and an arrangement adapted to control the voltage on the output of the rectifier based on information about said comparison and decrease it if the measured current exceeds the current limit value for reduction of the charging current.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: January 13, 2004
    Assignee: Bombardier Transportation GmbH
    Inventor: Benny Ljunggren
  • Method and a device for charging a battery
    Publication number: 20030141852
    Abstract: A device for charging a battery comprises an alternating current source, a rectifier being connected with its input to the alternating current source and being connected with its output to the battery for charging thereof. It also has a member for measuring the charging current from the rectifier to the battery and a means (13) for comparing the measured charging current with a current limit value and an arrangement adapted to control the voltage on the output of the rectifier based on information about said comparison and decrease it if the measured current exceeds the current limit value for reduction of the charging current.
    Type: Application
    Filed: November 20, 2002
    Publication date: July 31, 2003
    Inventor: Benny Ljunggren