Patents Assigned to Oilfield-Electric-Marine, Inc.
  • LOW SPEED AC MOTOR FOR DIRECT DRIVE APPLICATIONS
    Publication number: 20070267222
    Abstract: A low speed alternating current motor having motor shaft speeds of about 300 is provided, and such motor has application in numerous industries and devices, such as, for example, in top drive drilling systems. Because of the low shaft speed, mechanical speed reduction equipment may not be necessary. In addition, the motor shaft may be hollow to facilitate the flow of fluid, such as, for example, drilling mud.
    Type: Application
    Filed: October 3, 2006
    Publication date: November 22, 2007
    Applicant: OILFIELD-ELECTRIC-MARINE, INC.
    Inventors: ALVIE HOWARD, DANIEL MCNEASE, RUDY HARRIS, RICHARD BRADLEY
  • AC motor control system using parallel integrated sub systems
    Patent number: 6989650
    Abstract: A control system for a polyphase AC motor having a predetermined horsepower rating is provided comprising a plurality of integrated control systems each rated at less than the hoursepower rating for the motor and having a rectifier section, an inverter section, and a controller section, and a parallel controller interfaced to each integrated control system.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: January 24, 2006
    Assignee: Oilfield-Electric-Marine, Inc.
    Inventor: Kevin R. Williams