Patents Assigned to Astro Dynamics, Inc.
  • Trans-synchronous motor apparatus and method
    Patent number: 4300077
    Abstract: This disclosure is concerned with a motor technique for generating speeds that are fractions of synchronous speeds, through novel time-staggered selected half-cycle energization of a plurality of magnetic poles by a controlled switching sequence, generating such a fractional motor speed that would otherwise have to be produced by a much larger number of magnetic poles.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: November 10, 1981
    Assignee: Astro Dynamics, Inc.
    Inventors: Leonhard Katz, Lawrence A. Ormord
  • Method of and motor apparatus for generating high speeds
    Patent number: 3991353
    Abstract: This disclosure deals with a motor technique for enabling the running at speeds higher than 3600 r.p.m., for 60 c.p.s. excitation, without the previously required commutators, brushes, gear boxes or frequency changers, through novel sequence switching of different selected portions of three-phase power, controlled to cause multiple magnetic pole energization at different times from different power phases in order to produce successive phase-displaced resultant waveforms that are substantially sinusoidal but of a multiple of 60 c.p.s.
    Type: Grant
    Filed: December 12, 1974
    Date of Patent: November 9, 1976
    Assignee: Astro Dynamics, Inc.
    Inventors: Leonhard Katz, Lawrence A. Ormord