Patents by Inventor James S. Whited

James S. Whited 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).

  • Patent number: 4645997
    Abstract: In an apparatus for controlling the power factor of a power distribution system connected to inductive loads, banks of delta connected capacitors are added to or removed from the power lines of the power distribution system by a plurality of solid state switching devices which are under the control of a microprocessor. The solid state switching devices include optically isolated SCR devices that do not generate electrical interference and provide transient free operation. The microprocessor is also capable of calculating the power factor and displaying it on a digital readout.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: February 24, 1987
    Assignee: Kollmorgen Technologies Corporation
    Inventor: James S. Whited
  • Patent number: 4447771
    Abstract: A motor control system wherein the motor windings are energized by sinusoidal excitation currents synthesized from prerecorded sine values. The frequency of the winding excitation currents is synchronous with the rotor movement and the phase is a function of the rotor position with respect to the stator. The phase of the winding excitation is additionally controllable as a function of speed or some other adequate system parameter. It has further been found that the total operational speed range of the system is substantially increased by further adjusting and controlling the phase of the excitation currents as a function of the desired speed.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: May 8, 1984
    Assignee: Kollmorgen Technologies Corporation
    Inventor: James S. Whited