Pacific Scientific Company

Powertron Division of Contraves Goerz Corp.

Contraves Goerz Corporation

Pacsci Motion Control, Inc.

Powertec Industrial Motors, Inc.

Robert E Lordo

Bradley A Trago

George B Yundt

Lloyd W McSparran

Harry B Behm

A low voltage high horsepower brushless motor assembly including a plurality of axially aligned and interconnected stator module sections, a plurality of rotor modules mounted upon a common shaft corresponding to the plurality of stator module sections, and a single rotor position feedback encoder operating the motor, wherein each of the individual stator modules include multiple phase winding circuits terminating in a plurality of studs located on an exterior of their respective housings for interconnection with a plurality of controllers.

Low voltage high horsepower brushless motor assembly

The present invention is an apparatus for indicating the instantaneous position of a movable member along a range of motion with respect to a reference position. The apparatus includes a magnetic body that is fixedly attached to the movable member. The body has a contoured surface to control the shape of a magnetic field relative to position, and further includes at least two magnetic field sensors. Each of the sensors is disposed adjacent to the contoured surface of the magnetic body and fixed with respect to the reference position, and is positioned apart from the other sensors, so as to form a non-uniform gap between the contoured surface and each of the magnetic field sensors. Each of the sensors produces a position dependent signal corresponding to a value of the magnetic field. The apparatus further includes a decoding circuit electrically coupled to each of the magnetic field sensors so as to receive each of the position dependent signals. The decoding circuit produces a position dependent signal that is a predetermined function of the position dependent signals. Multiple sensors can be utilized to provide redundancy. Further, the apparatus can provide measurement correction of measurement errors caused by incorrect location of the magnetic field sensors.

Apparatus for measuring the position of a movable member

An electric machine, such as a motor or a generator, comprises a stator having a plurality of stator poles defining a plurality of slots, a rotor positioned within the stator, and at least a two sets of stator windings wound on the stator poles and occupying said stator slots such that the boundary windings of each set of stator windings occupies a common slot. These boundary windings of each set of stator windings are non-overlapping and include insulation positioned between them. The sets of stator windings are wound on the stator poles in a single pitch winding configuration significantly reducing the number of wire crossings resulting. In particular, the endturns defined by the individual phase coils are non-intersecting. Such a machine provides continued operation under various fault conditions.

Fault tolerant electric machine

A permanent magnet motor with enhanced inductance which comprises a motor frame having annular inner walls defining a void therein and a stator mounted on and extending around the periphery of the inner walls of the frame in the void in the motor frame. The stator includes windings positioned thereon for developing current from power supplied to the motor, the innermost portion of the stator defining a radial inner portion of the void. A rotor is mounted in the void radially inwardly of the stator for concentric rotation in the motor frame in closely spaced-apart relation to the stator. The rotor has an iron core for air gap flux interaction with the stator, and the rotor has a magnet zone and a lamination zone extending axially along the length of the rotor. The magnet zone has a permanent magnet positioned on the rotor and projecting therefrom for interaction with the windings on the stator to produce magnetic-field induced torque for rotating the rotor. The lamination zone has a plurality of stacked laminations positioned on the rotor for rotation therewith, the lamination zone being adjacent to the magnet zone and devoid of magnets. The laminations extend from the rotor shaft into closely spaced-apart radial alignment with a portion of the windings and forming an area of decreased air gap and increased inductance between the stator and the rotor.

Permanent magnet motor with enhanced inductance

A flight motion simulator includes a unit under test supported on a stationary frame for angular and translational movement along pitch, roll, and yaw axes. A rotor element is secured to the unit under test and has a spherical configuration. Magnetic bearings supported by the stationary frame support the rotor element in three degrees of freedom of movement. A drag-cup induction motor is mounted on the frame and connected to the unit under test to generate three degrees of freedom of movement by generating a rotating magnetic flux in a stator assembly to induce a corresponding flow of currents in the rotor element to produce torque and motion in the unit under test in the same direction as the flux movement in the stator assembly.

Spherical motion simulator

A frame (14) for a permanent magnet direct current motor (10) is formed of a plurality of frame modules (15). Each frame module (15) is of equal axial length and cross-sectional dimensions for being matingly connected together end-to-end to form the tubular frame (14) to a desired length.

Frame module for forming tubular frame of permanent magnet direct

A motor frame and stator assembly (20), (27), for a permanent magnet direct current motor is shown which is characterized by accommodating a larger and more powerful armature (12) relative to the interior and exterior dimensions of the frame (20). The assembly (20), (27) includes a metal frame (20) having a pre-determined length and continuous walls the inner surface of which define a void (24). A plurality of arcuate, recessed seats (25) is formed into the inner walls of the frame (20) in spaced-apart intervals around and extending along at least a part of the length of the frame (20). The walls of the frame (20) along the extent of the seats (25) are of reduced cross-sectional thickness. A plurality of permanent magnets (27) having a convex and concave side are mounted by the convex side against one of the plurality of seats (25). A permanent magnet DC motor (10) constructed of one or more metal frame modules (20) is also disclosed.

Growing community of inventors

Fort Mill, SC, United States of America

Robert E Lordo