Patents by Inventor Rolf Baldauf

Rolf Baldauf 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).

  • Multi-phase resonant converter with trimmable inductor and phase current balancing method
    Patent number: 8749332
    Abstract: A trimmable inductor assembly is provided for optimal balancing of phase currents in a multi-phase resonant converter. A magnetic device includes first and second core portions defining an outer edge of the device having a first axis, and further defining a first air gap. A bracket is positioned proximate the outer edge of the device and a magnetic plate is coupled to the bracket, with the magnetic plate and the second core portion defining a second air gap. A positioning device is coupled to the bracket and is responsive to control signals based on a detected phase current imbalance to drive the bracket and the magnetic plate between a first position defining a minimum air gap for the assembly and a second position defining a maximum air gap for the assembly.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: June 10, 2014
    Assignee: Power-One, Inc.
    Inventors: Gordon Zongbo Hu, Andrew Guoqun Li, Rolf Baldauf