Abstract: An electromagnetic actuator for producing axial forces between a stator element and a rotor element. The stator and rotor elements comprise structural bases with a laminated magnetic flux carrying assemblies secured therein. The laminated assemblies comprise a plurality of ferromagnetic sheets, each sheet extending substantially radially from and parallel to the axis of rotation. The rotor and stator elements are axially spaced with respective laminated assemblies in facing relationship.

Abstract: A stator housing surrounds the portion of a rotor having a magnetic flux carrying member extending around the rotor within the stator housing. A plurality of electromagnets are supported by the stator around the periphery of the rotor oppositely of the magnetic flux carrying member. Each of the electromagnets includes a stacked arrangement of laminations having an E-shaped cross-sectional configuration. Each lamination includes a pole tip in close proximity to the surface of the magnetic flux carrying member to form an air gap. Magnetizing coils extend around the legs of the E-shaped laminations. When electrical current is supplied to the coils, magnetic forces are exerted upon the magnetic flux carrying member enabling the rotor to be positioned in a levitated state within the stator housing.

Abstract: An electromagnetic axial thrust bearing comprises a rotating member, at least one stationary member and a winding for generating a m.m.f. associated with the stationary member. The stationary member is comprised of a solid ferromagnetic material having at least one arc-shaped groove substantially concentric with the turning axis of the rotating member. The groove is lined with laminates of a ferromagnetic material. The winding is laid into the lined groove of the stationary member. The rotating member has a groove facing the groove in the stationary member. Laminates of ferromagnetic material are stacked thereon.

Abstract: 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.

Abstract: A multi-winding a-c electric power supply is connected to a d-c load circuit via a power rectifier assembly comprising at least two legs connected in parallel across the load circuit. Each leg has at least four serially interconnected unilaterally conducting devices. A first one of the power supply windings is connected between the two rectifier legs at points between first and second devices thereof, and a duplicate winding (voltages of both windings are in-phase and of equal amplitude) is connected between the legs at points between third and fourth devices thereof, whereby the windings are effectively connected in parallel. The respective junctures of the second and third devices in all of the rectifier legs are interconnected by switching means which, upon switching to a closed circuit state, short circuits these junctures and thereby changes the connection of the windings from parallel to series.

Abstract: A plurality of stationary markers (A, B, C, and D) are symmetrically placed at predetermined locations in the right of way of an electrically propelled traction vehicle on opposite sides of a transition point coinciding with a gap (14) between adjacent sections (13a, 13b) of a wayside conductor. Proximity sensing means (PSR, PSL) on the vehicle provide discrete output signals on a first line (43) upon passing the first and third markers (A and C) and on a second line (44) upon passing the second and fourth markers (B and D). Receiver logic means (42) includes means (108, 111-115, and 118-127), responsive to the output signals on the first and second lines, respectively, for producing a first control signal (on line 51) during the first-to-third marker interval and a second control signal (on line 50) during the second-to-third marker interval.