Abstract: A pulse generating wheel, combined with a radial shaft sealing ring, for a machine element that can rotate about an axis. The pulse generating wheel has a cylindrical sleeve that can be slid onto the machine element. The radial shaft sealing ring is provided with a sealing lip, made of polymer material, that is delimited on the side facing the atmosphere by a conical surface. In a first axial position of the cylindrical sleeve, the conical surface is contacted by the cylindrical sleeve and can be expanded in the radial direction. The cylindrical sleeve can be displaced out of the first axial position into a second axial position in which the sealing lip moves into direct contact with the machine element, and the cylindrical sleeve is at an axial distance from the conical surface.

Abstract: A switched reluctance motor includes a stator defining a plurality of radially-inwardly-extending poles and a rotor defining a plurality of radially-outwardly-extending poles. The poles of the stator and the rotor are respectively divided into at least two longitudinal sections, with each pole section featuring a different shape when viewed in radial cross-section. The shape of one rotor pole section is such as to subdivide the pole into three teeth, namely, a central tooth flanked on either side by a side tooth, further characterized in that the shape of the central and side teeth are symmetric relative to a radius bisecting the central tooth. In a preferred embodiment, the circumferential spacing between the central tooth and each side tooth of one rotor pole is less than the circumferential spacing between the opposed side teeth of adjacent rotor poles.

Abstract: An aerodynamic drag reduction arrangement for use in a mechanical device that incorporates a high speed rotating element includes a boundary layer control member that defines a control surface. The control member is positioned adjacent the rotating element so as to optimize the clearance therebetween in order to effectively block axial flow and prevent radial pumping in order to minimize power consumption. The aerodynamic drag reduction arrangement is particularly adapted for use in electric rotors and scroll fluid devices.

Abstract: A combined linear-rotary stepping motor shares stator iron plates and mover iron cores for a linear motor portion and a rotary motor portion without lengthening the length in the shaft direction.The combined linear-rotary stepping motor includes a stator 1 having a stator iron core 10 provided with a plurality of salient poles 11, 12, 13, . . . composed of the salient poles having a plurality of first stator teeth 24 formed in inner peripheral surfaces thereof in the direction of a shaft 21 and the salient poles having a plurality of second stator teeth 25 formed in inner peripheral surfaces thereof in the circumferential direction and a mover 2 having mover iron cores 22a and 22b supported within the stator 1 movably in the shaft direction and rotatably and provided with a plurality of mover teeth 26 formed in outer peripheral surfaces thereof at an equal pitch in the shaft direction and the circumferential direction in opposing relation to the first and second stator teeth 24, 25.

Abstract: An axial flux induction motor has a stator and a disc-shaped rotor facing the stator with an air gap there-between. The rotor disc includes a first material of relatively high magnetic permeability and a second material of relatively high electrical conductivity, the first material being of higher specific gravity than the second material. The first material is in the form of an annular ring imbedded in or supported on one surface of the disc, opposite the surface thereof which faces the stator. The outer radius R.sub.1 of the annular ring and the outer radius R.sub.2 of the disc are related so that 1.2 R.sub.1 <R.sub.2 <1.6 R.sub.1. This achieves that at high rotational speeds the two disc materials will be subjected to more nearly equal centrifugal forces thereby making it feasible to operate at higher motor speeds.

Abstract: An electrical machine of the reluctance or permanent magnet type includes one or more pawns of high permeance material which are relatively moveable along a plurality of C-shaped stators which are regularly spaced at a predetermined stator pitch dimension. The pawn or pawns are of a length equal to or exceeding the stator pitch dimension such that as the pawn is pulled into the air gap of a stator which is energized, the magnetic field induced in the pawn or provided by a permanent magnet is coupled to a following stator which is not yet energized to avoid reverse acceleration of the pawn and reduce vibration. The field coupled to the following stator also reduces the power required to establish a desired level of magnetic flux in the following stator when the following stator is energized. The cross-section of the air gap of the stator and the pawn are closely matched to maintain a minimum air gap when the pawn passes through the air gap of each stator.

Abstract: The present invention relates to doubly salient reluctance machines (DSRMs) including switched reluctance machines, stepping motors and hybrid stepping motors. To improve the utilization of the machine windings and associated electronic circuits the windings are fully pitched across the stator poles, preferably with each stator slot containing conductors from a single winding only, and the power supply is switched to the windings to provide the required current sequence.

Abstract: A multiphase induction motor having concentrated phase windings utilizes adaptive torque control based on detection of asymmetry in the magnetic field density and corrective adjustment to restore symmetry based on voltage differences in the torque phase motor windings.

Abstract: An object of the present invention is to obtain a reluctance-type motor which is small in diameter and has good efficiency in a high speed region, or generates a large output torque without causing vibration, and allows regenerative braking as occasion demands. A magnetic rotor has two salient poles. A fixed armature has eight slots disposed at regular intervals. These eight slots are associated with No. 1-, No. 2-, No. 3-and No. 4-phase armature coils of two-phase full-wave current supply mode, so as to constitute a compact small-diameter motor. Each armature coil is supplied with current by an amount of 90-degree electric angle in response to a position detecting signal. Thus, a maximum torque can be obtained with good efficiency. Using electrostatic energy of a small-capacitance capacitor, transformation of magnetic energy of each armature coil can be completed in a short time. As a result, the motor can rotate at a higher speed.

Abstract: A variable reluctance electric motor includes a stator having a plurality of axially extending inner teeth and a rotor assembly rotatably supported therein. The rotor assembly includes a shaft having a plurality of rotor pole sub-assemblies provided thereon. Each of the rotor pole sub-assemblies includes a hub secured to the shaft, a pair of annular rotor packs secured to the ends of the hub, and an electromagnetic coil disposed loosely about the hub between the two rotor packs. Each of the rotor packs has a plurality of axially extending outer teeth formed thereabout which are disposed adjacent to the inner stator teeth. The rotor pack teeth of each of the rotor pole sub-assemblies are angularly offset from one another, preferably by equal amounts. The electromagnetic coils are engaged by the stator such that the rotor assembly is free to rotate relative thereto.

Abstract: The invention relates to an asynchronous electric machine, wherein a rotor rotating relative to a stator is provided with an electrically conductible coating. An air gap (.delta.) between the rotor and the stator is designed according to the following formula ##EQU1## in which D.sub.r =outer rotor diameter (mm),D.sub.s =inner stator diameter (mm),u=peripheral speed (m/s),.delta.=air gap (mm),A=a constant, whose magnitude .gtoreq.0.3, preferably 0.7-1.5, suitably 1,B=a constant, whose magnitude .ltoreq.150, preferably 50-100, suitably 70,C=a constant whose magnitude .ltoreq.1200, preferably 300-600, suitably 400; quality m/s/.sub.mmThe peripheral speed of the rotor is more than 100 m/s. Furthermore, the rotor is provided on its shaft body with an electrically conductible coating, which is designed to be continuous and to extend over the entire operative surface area of the rotor.

Abstract: An improved method is provided for the design of high-efficiency electric machines. The maximum practical value of air gap flux density B.sub.g is selected, consistent with maintaining acceptable noise and vibration levels. The value of B.sub.g selected is then used to determine the dimensions of the stator and rotor laminations so as to result in flux density levels that minimize core loss, stator I.sup.2 R and rotor I.sup.2 R losses, and magnetizing current requirements.

Abstract: A switched reluctance motor includes a stator having a central bore for rotation of a rotor therein. The stator has four equally spaced teeth extending radially inwardly from the yoke of the stator to define the central bore. A rotor assembly for rotation in the central bore of the stator is included. The rotor assembly has three teeth extending radially outwardly from the central axis of the motor to terminate in close proximity to the stator teeth. Stator windings associated with the stator teeth generate a magnetic field in the central bore to cause rotation of the rotor assembly.

Abstract: The invention relates to a reluctance motor having a ferromagnetic stationary member (3) and a ferromagnetic member (5) which is movable relative thereto, which exhibit an air gap (4) between spaced-apart pole faces (3c, 5c) of salient pole parts (3b, 5b), one of the members being provided with excitation coils, which surround ferromagnetic cores (3a, 5a) providing a ferromagnetic coupling between the pole parts of this member, the ferromagnetic cores being dimensioned to have such cross-sections that during the magnetisation of these cores by the excitation current the cores are magnetically saturated at the same time as the salient pole parts.

Abstract: An a.c. electrical machine includes a plurality of first elements spaced from each other; a plurality of second elements spaced from each other and interstitially disposed with the first elements; a plurality of electrical windings on each of the first elements providing a current flow in a first direction; and a return for completing a magnetic flux path in a second direction perpendicular to the first direction on successive first elements and through the second elements for generating a force in a third mutually perpendicular direction between the first and second elements.

Abstract: A reluctance type motor capable of rotating at a high speed with a large output torque has transistors (20a-20f) connected to both ends of phase exciting coils (39a-39c), a current supply control circuit for successively activating the exciting coils in response to position detecting signals, which represent rotor rotational positions to be detected by position detecting elements, and diodes (21a-21f) connecting the exciting coils and capacitors (47a-47c). When a current supply to the exciting coil is stopped, the capacitor is promptly charged by a magnetic energy stored in the exciting coil to extinguish the magnetic energy and also to rapidly build up an exciting current supplied to a subsequently activated exciting coil by use of a charged voltage in the capacitor.

Abstract: The object of the present invention is to obtain a motor capable of producing a large torque and operating with good efficiency in a high-speed region. A reluctance type motor according to the present invention, when one armature coil (32a) is deactivated through one switching element connected to a negative voltage terminal, prevents the magnetic energy stored in the magnetic core from returning to the electric power source by means of a back-flow preventing diode (21a). The magnetic energy is used to charge a small-capacitance capacitor (47a) to hold it to a high voltage. Thus, a trailing-off of current becomes steep. After a predetermined time has elapsed, a next armature coil (32e) is activated. As an applied voltage is a high voltage charged in the capacitor, the exciting current builds up sharply. Since the building-up and the trailing-off of the exciting current of the armature coil can be made sharp, the rotational speed can also be increased up to several 10 thousand rpm.

Abstract: An asynchronous salient pole induction motor having a stator core with equally-spaced teeth with inner ends having equal angular extent and defining a bore whereat a squirrel cage rotor is provided. A main field winding includes serially connected coils embracing alternate stator teeth and connected across a single phase source of alternating current. An auxiliary field winding includes serially connected coils embracing consecutive teeth intermediate the teeth having the main winding coils thereon. The auxiliary winding coils are phase displaced from the main winding coils. Each of the teeth faces at their inner ends are shaped for increasing the air gaps on both sides of the center line longitudinal plane of each tooth thereby increasing the magnetic reluctance between each of the teeth and the rotor on both sides of the center line plane.

Abstract: A switched reluctance motor (10) provides position and speed detection without a shaft position sensor. At least one of the stator pole faces (54) and/or at least one of the rotor pole faces (60) has an irregularity such as a notch (52 and/or 58) providing a perturbation or blip (70, 82) in the inductance profile (72, 76, 84) of the motor (10) during rotation of the rotor (14) indicative of the position of the rotor (14) relative to the stator (12). The frequency of the perturbations indicates motor speed.

Abstract: A reluctance-type motor in which two or more three-phase, half-wave reluctance-type motors are juxtaposed within an outer casing (42), the number of magnetic poles (16a, . . .) and salient poles per motor decreases. Accordingly, a long and narrow motor having a small diameter can be obtained. With a construction in which n number of three-phase, half-wave motors are juxtaposed, the output torque is multiplied by n. Further, by providing a phase difference of 120/n degrees for the output torque of each motor, the torque ripple can be made small and the characteristics at the start-up time become good. By feeding back the magnetic energy in an exciting coil to the D.C. power supply of the applied high voltage, the magnetic energy is extinguished rapidly to prevent a counter-torque from occurring, and a magnetic energy is stored rapidly by the applied high voltage to prevent a reduced torque from occurring.

Abstract: Windingless rotor, variable reluctance, field excited, eletromechanical machines that provide for a family of windingless rotor machines consisting of both line commutated, synchronous machines, and self-commutated or self-synchronous machines, in both rotary and linear format. The basic operational format of this group of machines is a combination of an interdependent working relationship between the geometric parameters of the stator and rotor poles, and specially contoured pole surfaces and tips, all working in a complementary relationship to provide magnetically workable, variable reluctance air gaps that are capable of controlling the alternating magnetic flux waveform to effect a viable and efficient energy conversion process at substantially the fundamental frequency component, which is also the synchronous frequency of operation of the machine.

Abstract: A brushless homopolar dynamoelectric machine motor (1) has a rotor (3) with a least one winding (5) having multiple turns. The rotor is inductively charged using a flux pump or a rectifier. Solenoid pairs (15a, 15b, 17a, 17b) comprise field windings for the motor and compensate for winding and field losses. The motor is an axisymmetric motor in which superconductive materials are used.

Abstract: A reluctance type electric motor, when an energization current in an exciting coil is interrupted at the end of a position detection signal, large magnetic energy stored in the exciting coil is prevented from being fed back to a power source by a reverse current prevention diode (43a, 43b) and it is forcedly caused to flow into an exciting coil to be next energized. Extinction of the stored magnetic energy in the preceding-stage exciting coil and accumulation of magnetic energy in the succeeding-stage exciting coil can be rapidly effected. A high-speed rotation (up to approximately 100,000 r.p.m.) can be attained with high torque obtained. If a plurality of teeth usually used for magnetic poles are provided, an effect that output torque increased by several times can be attached when a normal rotation speed is obtained.

Abstract: A limited angle torque actuator produces a substantially constant torque over an excursion angle of 90 degrees or more. The actuator uses a core made from a highly permeable magnetic material such as soft iron. In a preferred embodiment, one or more permanent magnets are attached to the outer surface of the cylindrical core. In another embodiment, the permanent magnets are spaced apart from a stationary core to create an air gap therebetween. When current flows through a coil wound on the stator, first and second stator poles are created which interact with the permanent magnets to rotate the rotor assembly.

Abstract: The present invention discloses a same polarity induction generator comprising a casing, a stator composed of a plurality of magnetic poles spaced away at a predetermined mechanical angle, a rotary shaft, a rotor mounted on said rotary shaft and composed of two pairs of ferrite magnets each pair having one polarity located outwardly of a circumference of the rotor and the other polarity located inwardly of the circumference, the respective pairs being arranged so as to have different polarities on the outer circumference of the rotor, magnetic cores fixedly mounted on the casing, and coil wirings each wound around said respective magnetic cores so as to intersect magnetic fluxes formed among said ferrite magnets.

Abstract: A high speed communication apparatus for a computerized axial tomography (CAT) scanner utilizes large diameter slip rings to permit continuous rotation of a rotatable gantry. A communication signal is applied at a first point on one slip ring, and is terminated by a resistive termination at a point 180.degree. opposite the driving point. The communication signal may then be received at any point on the slip ring. The drive and termination connections to the slip ring may be made by brushes, with the receive connection being made by a physical connection to the slip ring. Alternately, the drive and terminate connection may be made by physical contact, with the receive connection being made by a brush.

Abstract: A magnetizing type induction motor includes a conventional rotor enclosed within a novel stator. The stator has a pair of crescent-shaped pole pieces, the thickness of the stator pieces at their centers being larger than the thickness at the opposite edges thereof. These stator pieces are secured together by a pair of end cover plates which are provided with fitting grooves for receiving the stator pieces, and coupling pins are installed between the facing edges of the stator pieces. This magnetizing type induction motor is easily miniaturized and is not subject to frequent failures so that it can be reliably used in automated apparatuses.

Abstract: A reluctance motor is powered by a commutated ac voltage supply which comprises full cycles of the ac waveform interspersed with periods of zero power of fixed duration measured in full cycles. Motor structures are described which combine, with the above method of excitation, a feature by which a portion of the magnetic circuit carrying the magnetic flux developing reluctance drive torque during the power-on periods is magnetized cyclically over a range above the knee of the application B-H curve. A closed circuital dc flux path through this portion and separate from the ac flux route through the stator poles is magnetized as by permanent magnets to secure this near-saturation condition in which thermodynamic adiabatic cooling processes operate to enhance the power conversion efficiency of the motor by virtue of domain flux rotation processes.

Abstract: A variable speed controllable induction motor comprises a single rotor formed in one-piece having different sets of rotor conductive members effective respectively at different speed ranges, that is, at least a set of first conductive members specifically effective for a lower speed range and a set of second conductive members specifically effective for a higher speed ranges; a plurality of stators disposed side by side surrounding and facing respective portions of said rotor; and a phase shifting apparatus for producing phase differences on the respective portions of the rotor conductive members. The motor can achieve an overall wide range speed control due to the combined effects of the characteristics obtained respectively from the different set of the rotor conductive members.

Abstract: Radial loop coils are wound in radial planes partly in the conventional slots of the stator and/or rotor core at right angles to the planes of the conventional drum coils. No conventional drum coils are wound. A cylindrical body of nonmagnetic material is fixedly interposed between the rotor core and the shaft and/or between the stator core and the yoke so that the flux of the stator and the rotor core flows in opposite side portions of the stator and rotor core, not through the shaft or the yoke, to generate e.m.f. in the radial loop coils by the transformer action. The flux which is produced by the transformer m.m.f. of the radial loop coils is constrained to flow into the air gap by virtue of the presence of the cylindrical body of nonmagnetic material where it acts to eliminate changes in the main magnetic field flux density distribution in the air gap.

Abstract: A squirrel-cage induction motor having a sectional stator comprising a first stator fixedly held on a frame, and a second stator circumferentially movably supported on the frame beside the first stator. The second stator is displaced relative to the first stator through a gear mechanism by a control motor through an angle meeting operating conditions of the squirrel-cage motor required by the load. Thus, the squirrel-cage induction motor has satisfactory response characteristics, and the second stator can manually be turned in case the component of the mechanism for driving the second stator, for example, the control motor, malfunctions.

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 reluctance electric machine which comprises a stator with electric windings, a rotor including ferromagnetic material members, inserted into the stator and separted therefrom by an air gap, and members of non-ferromagnetic material inserted in the rotor in such a way that the cross section of the ferromagnetic material members of the rotor, at least near the air gap, is decreased by the insertion of the members of non-ferromagnetic material in such a way that the ratio between the ferromagnetic material cross section and the whole cross section available does not exceed 0.6, and the ratio between at least one linear dimension of the non-ferromagnetic material members, lying in a plane tangent to the air gap, and the thickness of the machine air gap, does not exceed 5. The electric machine is fed by an electronic circuit for vectorial control (in amplitude and phase) of the current feeding the electric windings of the stator.

Abstract: Selective compliance in up to six degress of freedom in a magnetically levitated fine motion device, or robot wrist, with limited motion in X,Y,Z, ROLL, PITCH, YAW, is provided by controlled actuation currents applied to six electrodynamic forcer elements. The wrist has a stator support base defining a dual periphery, carrying a number of stator magnet units. A shell flotor unit nests within the stator support base dual periphery, and carries forcer coils at locations corresponding to respective magnet units. The magnet unit and related flotor coil form a forcer element. There are a number of forcer elements. The vector sum of all the translational forces and rotational torques established at the forcer elements determines the X,Y,Z, ROLL, PITCH, and YAW motion of the flotor. The flotor carries an end effector which may be a tool. Position and orientation of the flotor is monitored by light emitting diodes and lateral effect cells.

Abstract: Stator slots are skewed relative to rotor slots with a skew amount comprising an integer multiple of a stator electrical angle of 60.degree., thereby minimizing a torque ripple which is an integer multiple of six times of a primary frequency of electrical energy.

Abstract: A three-phase induction motor is subjected to countermeasure for the rotor and the stator in order to remove two harmonic components of the orders causing a torque ripple, among a plurality of harmonic components included in a magnetic flux generated in an air gap between a stator core and a rotor core. In the three-phase induction motor, conductor grooves of the rotor core are skewed by an electrical angle of 2.pi./n where n is the order of one of the harmonic components to be removed. In the stator, the number of slots (N) is selected so that an equation N=l.times.m.times.q is satisfied, where l=the number of poles, m=the number of phase, and q is a non integer number representing the number of slots per pole per phase, and the stator winding pitch is determined according to the order of another harmonic component to be removed.

Abstract: An improvement of a homopole type AC generator which is of homopole type arrangement and is adapted to generate alternating current (AC) depending upon interlinkaging operation of magnetic fluxed comprising a rotor magnet rotatable by a roational force from outside, a yoke through which magnetic fluxes flow from the N pole of the rotor magnet to the S pole and forms a part of a magnetic circuit, and generating coils provided at positions interlinking with the magnetic cirucit, wherein a magnetic circuit connecting two rotary pole pieces which are provided on a rotary drive shaft at both sides of the rotor magnet is disconnected to eliminate a harmful magnetic circuit opposing the action of generation.

Abstract: An induction-motor structure having a synchronous-rotor and an induction-rotor in which inner- and outer-synchronous-rotor poles and a synchronous-rotor-pole connector surround the inner-cylindrical surface of the hollow cylindrical induction rotor, the outer-cylindrical surface of a hollow cylindrical stator core having alternating-current windings and surround the ends of that induction rotor and that core. At least one of the rotor poles includes magnetic field concentrators. A stationary field winding mounted on the end of the stator may be used adjust power factor.

Abstract: In a spherical pump, having a separation wall separating the wet part from the dry part of the pump, the column for the ball of the spherical bearing is made from the same material as the separation wall and is clamped in a cylindrical protrusion of the separation wall.

Abstract: An X-Y table generally comprises a stationary bed and a table body disposed on the bed to be movable along guide member in X- and Y-axis directions in rectangular coordinates. The table body is driven by a linear motor to be disposed between the table body and the stationary bed, and the linear motor comprises a fixed member as a stator disposed on the upper surface of the stationary bed or the lower surface of the table body, first and second movable members disposed in operative association with the fixed member on the other surface, and a magnetic device for moving the first and second movable members. The fixed member is provided with fixed teeth formed in a lattice shape, with equal pitches in X- and Y-axis directions.

Abstract: A power and free roller conveyor has a plurality of spaced rollers defining a conveyor path and to each of which is fixed a drive that comprises the secondary of a linear induction motor. The primary of the linear induction motor is positioned adjacent the drivers to enable an interaction of magnetic flux and current resulting from the propagation of a magnetic wave along the primary to cause the drivers and the rollers to rotate. The speed, torque, and direction of rotation of the rollers can be controlled by a voltage and frequency control unit.

Abstract: A rotor of induction motor comprises a rotary shaft, a cylindrical rotor core fixedly secured on the rotary shaft, a conductive cover fixed on the outer circumferential surface of the rotor core, the conductive cover being formed of a composite material of magnetic material and electrically highly conductive material to have a circumferential permeability smaller than a radial permeability, and a magnetic skin made of a magnetic material and provided on the outer circumferential surface of the conductive cover, the magnetic skin having a circumferential permeability and an electrical conductivity which are set to be larger than the circumferential permeability and an electrical resistivity of the conductive cover, respectively, whereby a loss due to a spatial higher harmonics magnetic flux of higher order generated by a pulsating magnetic flux of slots in a stator of induction motor can be prevented.

Abstract: An improved electric motor is operated from a single phase alternating current power source and employs a start winding and a run winding connected in series. A capacitor is connected in parallel with the start winding; and the inductance of the start winding and the capacitance of the capacitor are selected to form an LC resonant circuit at the operating frequency, thereby displacing the phase of the alternating current in the motor winding by 90.degree..

Abstract: A rotor for an electric motor with a spherical surface consists of a ring of soft iron and a squirrel cage made preferably from copper. The squirrel cage consists of copper bars lying in spiral grooves and a cooper ring on each axial end of the iron ring, short-circuiting all bars. The pole segments between the grooves do not have pole shoes. A cap made of ferro-magnetic metal covers the windings and acts magnetically in the same way as pole shoes. The cap surrounds the hollow spaces between the ring and the cap. The squirrel cage will preferably be cast by filling the spaces with molten copper during manufacture.

Abstract: A three-phase induction motor includes winding slots and a stator winding. The number of winding slots per pole per phase is a noninteger. The stator winding is a three-phase balanced winding. A pitch s of the winding satisfies s=(r-t)/r or s=r/(r+t) (where t is an odd number and r is the order of a harmonic wave to be suppressed).

Abstract: A spherical motor particularly adapted for robotic control. The motor comprises a stator housing defining a semispherical socket having an opening of generally polar cap form with a spherical rotor rotatably received in the socket for rotation therein about three axes intersecting at the center of the rotor with one of the axes projecting through the opening and the other two axes being orthogonal thereto. A motion transmitter is carried by the rotor and aligned generally along one axis to project through the opening, and windings are carried by the stator housing in encompassing and in opposed relation to the rotor for rotating the rotor about the axis. A polyphase control selectively controls relative phase and energization of the windings to rotate the spherical rotor a substantially unlimited amount about one axis and in limited amounts about the other axes so as to maintain the motion transmitting member within the confines of the opening.

Abstract: Electrical machines having a first assembly including first and second windings, both of which windings are approximately equally displaced from an axis. The first winding has conductors which are approximately parallel to the axis over most of their length, and the second winding has conductors which are approximately perpendicular to the axis over most of their length. A second assembly surrounds the first assembly and has a winding arrangement. The first assembly is rotatable within the second assembly around more than one axis upon electrical energization of the winding arrangement and of the first and second windings in the first assembly. Also described is electrical apparatus including means for adjustably controlling the relative phases of the set of alternating currents and connected with the electrical machine.

Abstract: A low inertia, speed variable induction motor comprises a frame, a stator fixedly placed in the frame, a yoke fixedly placed in the frame in opposition to the stator with a predetermined gap and a cup-shaped rotor which is inserted into the gap and is fixedly mounted on an output shaft supported in the frame in a freely rotatable manner. Rotating magnetic field is produced in the gap by the stator and the yoke to generate a rotational torque of the cup-shaped rotor. The cup-shaped rotor is formed of a material or materials having a hysteresis characteristic and an eddy current producing characteristic to obtain a large torque.

Abstract: Electrical machine including a base member, a rotor and a stator. The base member has a first magnetically permeable body with a first winding arrangement. The rotor has a second magnetically permeable body and is rotatable relative to the base member around first and second axes. The stator is adjacent to the base member, surrounds the rotor and has a stator core and second and third winding arrangements. The stator core is wound with the second winding arrangement held inward near the rotor, and wound with the third winding arrangement exterior to the stator core. The second winding arrangement is energizable to rotate the rotor around the first axis, and the first and third winding arrangements are jointly energizable to rotate the rotor around the second axis. Other electrical machines are also described.

Abstract: A rotating machine is provided of the type in which the rotor includes a plurality of radial permanent magnets joined by pole pieces in the form of arcs of a circle, wherein the pole pieces have slots therein which oppose the propagation of magnetic fluxes in any direction other than the substantially radial direction of the concentration of the armature flux. The result is a notable increase in the power-to-weight ratio of the machine.