Patents Assigned to Enviro World Systems, Inc.
  • Method and apparatus to control input to AC induction motors
    Patent number: 6954046
    Abstract: One embodiment of the present invention is a method to control input to an alternating current (AC) induction motor from a power supply that includes steps of: (a) determining a measure of reactive power (VAR) in two input lines to the motor during a time period; and (b) maintaining an SSR (solid state relay) connected in series between the power supply and the motor in a non-conducting state for a subsequent time period, the length of which subsequent time period is determined by analyzing the measure of VAR.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: October 11, 2005
    Assignee: Enviro World Systems, Inc.
    Inventor: Jerry D. Cashatt
  • Method and apparatus to control input to AC induction motors
    Publication number: 20040174134
    Abstract: One embodiment of the present invention is a method to control input to an alternating current (AC) induction motor from a power supply that includes steps of: (a) determining a measure of reactive power (VAR) in two input lines to the motor during a time period; and (b) maintaining an SSR (solid state relay) connected in series between the power supply and the motor in a non-conducting state for a subsequent time period, the length of which subsequent time period is determined by analyzing the measure of VAR.
    Type: Application
    Filed: March 18, 2004
    Publication date: September 9, 2004
    Applicant: Enviro World Systems, Inc.
    Inventor: Jerry D. Cashatt
  • Method and apparatus to control input to AC induction motors
    Patent number: 6737827
    Abstract: Method/apparatus for controlling input to an AC induction motor from a power supply that determines a measure of reactive power in two input lines to the motor from the power supply, and uses that measure of reactive power to control an SSR in series between the power supply and the motor. In one arrangement, a voltage difference between the two input lines and a current in one of the lines is used to determine the measure of reactive power.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: May 18, 2004
    Assignee: Enviro World Systems, Inc.
    Inventor: Jerry D. Cashatt