Patents by Inventor Dave Sewhuk

Dave Sewhuk 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 apparatus to drive two-phase motors from a three-phase bridge
    Patent number: 8552672
    Abstract: A motor drive for driving two-phase motors using a three-phase bridge output stage, and a method of operating the drive. The driven two-phase motor can be a two-phase bipolar motor (such as a hybrid stepping motor). The drive can also be configured so that a single output stage can be used to drive either two-phase or three-phase motors, with or without a feedback sensor. A reference return is provided from one of the three half-bridge output stages with each of the motor phase windings connected between the reference return and one of the other half-bridge outputs. The switches of each half-bridge are modulated so that current can be controlled in each of the two motor phase windings.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: October 8, 2013
    Assignee: Teknic, Inc.
    Inventors: Thomas John Bucella, Dave Sewhuk, Scott Mayne, Warren God
  • METHOD AND APPARATUS TO DRIVE TWO-PHASE MOTORS FROM A THREE-PHASE BRIDGE
    Publication number: 20120091935
    Abstract: A motor drive for driving two-phase motors using a three-phase bridge output stage, and a method of operating the drive. The driven two-phase motor can be a two-phase bipolar motor (such as a hybrid stepping motor). The drive can also be configured so that a single output stage can be used to drive either two-phase or three-phase motors, with or without a feedback sensor. A reference return is provided from one of the three half-bridge output stages with each of the motor phase windings connected between the reference return and one of the other half-bridge outputs. The switches of each half-bridge are modulated so that current can be controlled in each of the two motor phase windings.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 19, 2012
    Applicant: TEKNIC, INC.
    Inventors: Thomas John Bucella, Dave Sewhuk, Scott Mayne, Warren God