Patents Assigned to Heller-DeJulio Corporation
  • Rotary induction machine having control of secondary winding impedance
    Patent number: 6163137
    Abstract: A rotary induction machine in which operating characteristics of the machine are controlled by adding impedance elements to the rotor windings in which the impedance elements are stationary and connected to the rotor windings by a rotary transformer.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: December 19, 2000
    Assignee: Heller-DeJulio Corporation
    Inventors: Alan K. Wallace, James A. Oliver
  • Rotary induction machine having control of secondary winding impedance
    Patent number: 5986438
    Abstract: A rotary induction machine having wound primary and secondary windings with resistive means connected in series with secondary windings and inductive reactive means connected across said resistive means, with the inductive reactance means and resistive means selected to provide an effective resistance which controls the current in the generator secondary windings, whereby the generator rated current is reached at the highest slip for the range of desired power output.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: November 16, 1999
    Assignee: Heller-DeJulio Corporation
    Inventors: Alan K. Wallace, James A. Oliver
  • Rotary induction machine having control of secondary winding impedance
    Patent number: 5587643
    Abstract: A rotary induction machine having wound primary and secondary windings with capacitive means connected directly across said secondary windings and resistive means connected in series with said secondary windings.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: December 24, 1996
    Assignee: Heller DeJulio Corporation
    Inventor: Samuel Heller
  • Rotary induction generator adapted to be driven by a prime mover for generating electric power
    Patent number: 5525894
    Abstract: A rotary induction generator having a stator with stator windings defining a three-phase stator and a rotor mounted for rotation therein, and having wound thereon three rotor windings defining a three-phase rotor and having resistive-reactive means connected to said secondary windings to increase the efficiency of said generator and limit the power output to the capacity of the generator over a wide range of speeds.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: June 11, 1996
    Assignee: Heller-DeJulio Corporation
    Inventor: Samuel Heller