Patents by Inventor Jesper Riber Rosholm

Jesper Riber Rosholm 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 device for controlling a brushless electric motor
    Patent number: 6380707
    Abstract: The brushless electric motor (M) is provided with switching means (Q1-Q6) for selectively supplying current to the armature windings (U, V, W) of the motor (M) from a DC-power supply (1) The switching means (Q1-Q6) are controlled by measuring the back-electromotive forces developed in the windings (U, V, W) during operation and comparing these measurements with a high and low reference voltage, in such a way that each time a measured back-electromotive force with positive slope crosses the high reference voltage or a measured back-electromotive force with negative slope crosses the low reference voltage, a commutation signal is generated to commutate the switching means (Q1-Q6), this provides a highly simplified control of the switching means.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: April 30, 2002
    Assignee: Danfoss Compressors GmbH
    Inventors: Jesper Riber Rosholm, Jan Carøe Aarestrup