Abstract: Disclosed is a switched reluctance motor which can reduce noise and prevent overheating in rotation of a rotor. The switched reluctance motor includes: a stator core having a plurality of inwardly protruded poles at predetermined intervals; coils wound around the protruded poles of the stator core; and a rotor core being rotatably housed inside the stator core with a predetermined gap, and having a plurality of outwardly protruded poles along the radial direction, and round units protruded from the front ends of each protruded pole of the rotor core starting to meet each protruded pole of the stator core, so that gaps between the protruded poles of the stator core and the protruded poles of the rotor core can be gradually reduced.

Abstract: An axial motor includes an armature side stator (13), a pair of rotors, and a pair of stators, which are arranged with gaps left therebetween in the axial direction of a drive shaft (34). The armature side stator (13) includes armature coils (24). The pair of rotors are a first rotor (12) and a second rotor (14) that are arranged on both sides of the stator (13) and include inducers (20, 21, 27, 28). The pair of stators are a first field side stator (11) and a second field side stator (16) that are arranged respectively on oppositely spacing sides of the first rotor and the second rotor. The first and second rotors (12, 14) are mounted to the drive shaft (34). The first and second field side stators (11, 15) include respectively first and second field coils (18, 31) arranged in a tone form about the axis of the drive shaft (34).

Abstract: A two-phase switched reluctance machine is provided using discontinuous core structures as the stator for low-cost, high-performance drives. This discontinuous stator core structure contains short flux paths and maximum overlap between the rotor poles and stator poles in the stator discontinuous core structures, regardless of the rotor position. Example configurations of such core structure include E-core, L-core and I-core configurations. Using less steel and magnet wire than in conventional SRM designs results in cost savings of stator material and winding material. Efficiency of this novel SRM is improved because of shorter flux paths resulting in reduction of core losses and decreased phase resistance resulting in reduction of copper losses. Two-phase simultaneous excitation of the novel SRM can reduce torque ripple during commutation as compared with existing two-phase SRMs.

Abstract: A 2-axis driving electromagnetic scanner, having a structure in which a mirror is separated from a driving unit and directly driven, is provided. The electromagnetic scanner includes: an outer driving unit which is capable of rotating around a first axis; an inner driving unit which is suspended from the outer driving unit so as to rotate around a second axis perpendicular to the first axis; and a stage which is located on an upper surface of the inner driving unit so as to rotate together with the inner driving unit. In the electromagnetic scanner, the stage is connected to the inner driving unit by a link unit protruding from a center of a lower surface of the stage.

Abstract: In a motor, a stationary member is provided with a number M (M is a positive integer) of first poles within 360 electrical degrees at spaces therebetween. A plurality of windings are at least partly wound in the spaces, respectively. A movable member is movably arranged relative to the stationary member and provided with a number K (K is a positive integer) of second poles. The number K of second poles is different from the number M of first poles. A unidirectional current supply unit supplies a unidirectional current to at least one of the windings so as to create an attractive force between at least one of the first poles and a corresponding at least one of the second poles to thereby move the movable member relative to the stationary member.

Abstract: Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain rotors for use in transverse and commutated flux machines may be formed to facilitate a “many to many” flux switch configuration between flux concentrating stator portions having opposite polarities. Other rotors may be formed from a first material, and contain flux switches formed from a second material. Yet other rotors may be machined, pressed, stamped, folded, and/or otherwise mechanically formed. Via use of such rotors, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.

Abstract: Disclosed are single- and poly-phase transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Exemplary devices, including polyphase devices, may variously be configured with an interior rotor and/or an interior stator. Other exemplary devices, including polyphase devices, may be configured in a slim, stacked, and/or nested configuration. Via use of such polyphase configurations, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.

Abstract: The energy storage device has an electrical machine (12) comprising a rotor (14) and a stator (16), the stator (16) being separated from the rotor (14) by an air gap (18) and having at least one stator coil (20). The rotor (14), moreover, has a fly-mass (22) and, together with the latter, constitutes a rotating body. The rotor (14) or the rotating body consists of a multiplicity of thin sheet-metallic discs (30), which have the form, substantially, of an annular disc having an outer edge and an inner edge. There has been applied to these sheet-metal discs (30), at their outer edge, a first tensile stress and, at their inner edge, a first shear stress.

Abstract: A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface of the ferromagnetic material grains, wherein an amount of iron atoms in the fluorine compound particles is 1 to 50 atomic %.

Abstract: An accessory drive system which is capable of preventing the driving efficiency thereof from being lowered and achieving simplified construction, and reduction of the size and manufacturing costs. The system has a rotating machine including a first rotor, a second rotor, and a stator. The first rotor is formed by magnetic poles circumferentially arranged, with each two adjacent ones having different polarities. The stator has an armature row for generating a rotating magnetic pole that circumferentially rotates, between the armature and magnetic pole rows. The second rotor is formed by soft magnetic material elements circumferentially arranged with space, and disposed between the magnetic pole and armature rows. A ratio between the number of the armature magnetic poles, that of the magnetic poles, and that of the soft magnetic material elements is set to 1:m:(1+m)/2(m?1.0).

Abstract: The present invention provides a magnetically geared generator including an inner winding unit having a first number of pole pairs, an outer winding unit arranged coaxially around the inner winding unit and having a second number of pole pairs, and a rotatable magnetic flux modulator arranged coaxially between the inner winding unit and the outer winding unit. The inner winding unit, the outer winding unit and the rotatable magnetic flux modulator are adapted to convert rotational input energy provided at the rotatable magnetic flux modulator into electrical output energy provided as an alternating output current at one of the inner winding unit and the outer winding unit, and to control an output frequency of the alternating output current by communicating output energy as an alternating feedback current to the other one of the inner winding unit and the outer winding unit and by adjusting a feedback frequency of the alternating feedback current.

Abstract: A motor for high temperature applications has a stator that carries windings and a rotor that carries magnets. The rotor and the stator are built up from a stack of laminations made of a high temperature rare-earth permanent magnetic alloy. The stator windings are made of a high temperature magnet wire insulated with a vitreous enamel film bonded to the magnet wire. The stator windings are bonded together with an electrically resistant adhesive made of a ceramic binder. Preferably, the stator and rotor laminations are made of an iron-cobalt-vanadium permanent magnetic alloy selected to have high magnetic saturation, high D.C. maximum permeability, low D.C. coercive force, and low A.C. core loss. In a preferred embodiment, these components are integrated in a switched reluctance motor (SRM) that can operate at at least 460° C. for long durations.

Abstract: Flux-switching electrical machines. In particular, a flux-switching electrical machine having a stator and a rotor. The stator has permanent magnets, armature windings and excitation windings, and the rotor has no winding or permanent magnet but includes a plurality of flux-switching teeth. The stator is generally formed by a succession of elementary cells, each cell being intended to interact with only a single tooth of the rotor at a time. Each cell includes one of the permanent magnets; a first slot for at least partly housing one of the excitation windings at least; and second slots for housing one of the armature windings.

Abstract: An electric machine, such as a switched reluctance motor (SRM), having a stator housing that allows for stator chuck assemblies to be removed and replaced independently of other stator chuck assemblies is described. The stator housing of the electric machine has a plurality of slots for receiving the stator chuck assemblies and for supporting the chuck assemblies in fixed positions relative to a rotor assembly of the electric machine. In preferred embodiments, the slots are disposed on the exterior surface of the stator housing.

Abstract: A combined motor-battery system comprising an electric power source adapted to convert self-originating electrical current to mechanical power utilizing a set of common functional structures. Preferred embodiments include an electrochemical cell comprising field reactive electrodes that directly produce extractable mechanical forces in the presence of a magnetic field.

Abstract: The electric machine of the invention operates in a synchronous manner based on the principle of reluctance variation. It comprises the following combination: a fixed portion (1) with notches (11) for receiving armature coils (12) connected in series by phase, wherein the successive windings as wound in opposite directions; a mobile portion (4) with teeth (6) facing the notches (11), wherein to a tooth of the mobile portion corresponds a number M×(2P) of notches in the fixed portion, M being an integer and P the number of phases; an excitation portion (15) with a coil or a permanent magnet for generating a continuous magnetic flow between the fixed (1) and mobile (4) portions. The invention can be used in the production of rotary or linear synchronous electric motors and in the production of alternators.

Abstract: Electric machines which are excited with permanent magnets are to be improved in terms of their smoothness of operation and their loss properties. For this purpose, an electric machine is proposed comprising a first active part (40) on which one electric magnet (41, 42) and at least one permanent magnet (44) are mounted, and a second active part (43) which has a multiplicity of pole teeth (45, 46) and which interacts magnetically with the first active part (40). The pole teeth (45, 46) are spaced apart from one another in a non-uniform fashion in the direction (3) of the movement of the electric machine and/or have different average widths from one another, with the respective width of a tooth being measured in the direction (3) of movement and being averaged in terms of the extent of the tooth in the transverse direction with respect to the direction of travel. The geometry of the tooth causes the harmonics of the magnetic field to be influenced in a selective fashion.

Abstract: A variable flow coolant pump for an engine of a motor vehicle comprises a pump housing defining a fluid chamber. The fluid chamber includes a fluid inlet and a fluid outlet for providing flow of coolant through the housing. An impeller is rotationally supported in the fluid chamber between the inlet and the outlet for pumping coolant through the housing. An engine driven shaft is disposed within the housing for supporting the impeller and rotating the impeller about a longitudinal axis. An electromagnetic field generator selectively produces a magnetic field that moves the impeller axially along the shaft between a first position and a second position which selectively changes the amount of coolant flow through the housing between the fluid inlet and the fluid outlet.

Abstract: An electrical machine comprises a moving part and a stationary part. The moving part is in the form of an inner rotor without windings, and the rotor comprises at least two magnetic conductors, which are separated from one another axially such that impeller wheels are formed. The stationary part has a number of magnetically acting webs in the circumferential direction of the machine. The webs are operatively connected to the magnetic conductors of the rotor. The stationary part has at least one first winding structure which is likewise operatively connected to the axially separated magnetic conductors of the rotor. In addition, a second winding structure is included on the webs wherein either the first winding structure acts as an armature winding and the second winding structure acts as a field winding, or vice versa. The impeller wheels are radially innerly magnetically effectively connected by means of a further magnetic conductor.

Abstract: A cable for supplying electric power to a motor is electrically connected to an inner conductor of a terminal block via a contact by a mating structure of a male connector and a female connector. A connecting member for electrically connecting the inner conductor and a motor winding includes a fixed terminal and a movable terminal. The fixed terminal is electrically connected to the inner conductor by a fixing member and has a portion formed to extend along a terminal at the tip of the motor winding. The movable terminal is elastically deformable in accordance with the position of the terminal and arranged to hold the terminal interposed between itself and the fixed terminal. As a result, a motor module can be assembled to the terminal block integrally formed with a housing, while component tolerance is effectively absorbed by the connecting member.

Abstract: A motor is disclosed, which includes: a rotor, to an inside of which a magnet is coupled, and from a center portion of which a tube-shaped cylindrical portion protrudes out; a shaft, which has one end coupled to the cylindrical portion, where the outer diameter of the one end of the shaft is greater than that of the other side; a holder, which supports the other end of the shaft, and which has a portion inserted in the cylindrical portion; a bearing, which is positioned between the holder and the other end of the shaft, and which rotatably supports the other end of the shaft; a stator, which is adjacent to the magnet, and which has a coil wound around a portion; and a base, which supports the holder. This motor may be utilized to better maintain verticality in the shaft of the motor and prevent wobbling in the disk.

Abstract: The sintered magnet and the rotating machine equipped with the same are disclosed. The sintered magnet includes crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or oxyfluoride compound layer containing at least one element selected from an alkali metal element, an alkali earth metal element, and a rare earth element. The layer is formed inside some of the crystal grains or in a part of a grain boundary part. An oxyfluoride compound or fluoride compound layer containing carbon in a stratified form is formed on an outermost surface of the crystal grains. The fluoride compound or oxyfluoride compound layer has a concentration gradient of carbon, contains at least one light rare earth element and at least one heavy rare earth element. The heavy rare earth element has a concentration lower than that of the light rare earth element.

Abstract: A permanent magnet-less, brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by an alternating current. An uncluttered rotor disposed within the magnetic rotating field is spaced apart from the stator to form an air gap relative to an axis of rotation. A stationary excitation core spaced apart from the uncluttered rotor by an axial air gap and a radial air gap substantially encloses the stationary excitation core. Some permanent magnet-less, brushless synchronous systems include stator core gaps to reduce axial flux flow. Some permanent magnet-less, brushless synchronous systems include an uncluttered rotor coupled to outer laminations. The quadrature-axis inductance may be increased in some synchronous systems. Some synchronous systems convert energy such as mechanical energy into electrical energy (e.g., a generator); other synchronous systems may convert any form of energy into mechanical energy (e.g., a motor).

Abstract: A rotor is operable to rotate in a rotating direction, and is provided with five teeth that define five slots therebetween at regular intervals in the rotating direction. A pair of arc-shaped magnets surrounds the rotor, and faces each other through the rotor. A value of a circumferential angle between two adjacent slots with respect to an axis of the rotor is defined as a. A value of a circumferential angle between opposite end edges of an inner surface of the magnet in a circumferential direction of the magnet, which faces the rotor, with respect to the axis of the rotor is defined as b. The value of b falls within a range from 23 to 25 when the value of a is assumed as 12.

Abstract: In a synchronous reluctance motor composed of a stator core and a rotor core, convex grooves are formed along q-axis in an outer circumferential surface of the rotor core. A rotor coil is wound in the convex grooves. Applying a direct current to the rotor coil generates a torque of a current magnetic flux ?i in addition to a reluctance torque. Each convex groove formed at the q-axis prevents decreasing the reluctance torque. The rotor coil has a cross sectional shape in a diametrical direction of the rotor coil so that the rotor coil has a maximum diametrical width at the q-axis position, and the diametrical width of the rotor coil is gradually decreased according to the distance from the q-axis position.

Abstract: A permanent magnet-less synchronous system includes a stator that generates a magnetic revolving field when sourced by an alternating current. An uncluttered rotor is disposed within the magnetic revolving field and spaced apart from the stator to form an air gap relative to an axis of rotation. The rotor includes a plurality of rotor pole stacks having an inner periphery biased by single polarity of a north-pole field and a south-pole field, respectively. The outer periphery of each of the rotor pole stacks are biased by an alternating polarity.

Abstract: The invention disclosed is a magnet engine, more specifically an engine that derives its power from the power contained in a magnet (22) and employs a cam or barrel drive mechanism (28) to translate the power in the magnet (22) into useful power output. The magnet engine is comprised generally of one or more in-line reciprocating magnet (22) and piston (20) component pairs arranged circularly around and parallel to a central axis, one or more variable magnetic field conductors (23) positioned generally between and generally equidistant from each of the magnet (22) and piston (20) components, in a magnet (22) and piston (20) component pair, that effect a reciprocating motion in the magnet (22) and piston (20) components, and one or more cam drives (28), positioned concentric to the magnet (22) and piston (20) component pairs, that are employed to translate the reciprocating motion of the magnet (22) and piston (20) component pairs into rotary motion.

Abstract: This motor of the type comprising a magnet-less rotor with studs, centred on an axis, and a stator which comprises a casing for conducting magnetic flux, at least two windings which are arranged on the casing and on the circumference of a circle which surrounds the rotor and which is centred on the axis, and at least two magnets, each being arranged on the circumference of the circle between two successive windings of the stator, wherein each magnet has in cross-section a width which increases progressively from the axis of the motor to the outer side of the motor.

Abstract: A rotating electric machine apparatus includes at least one end plate associated with an inner assembly unit that operates to prevent contact between the inner assembly unit and an outer assembly unit. The end plate is peripherally sized to allow the slidable assembly of the inner assembly unit into the outer assembly unit while preventing undesirable contact of the inner assembly unit with the outer assembly unit.

Abstract: A flux-switching machine stator comprising two or more C-cores, each C-core having two legs and a back portion joining the legs, and a permanent magnet arranged between legs of adjacent C-cores. Each leg has a main portion and a tip portion further from the back portion characterized in that the tip portion of each leg is angled relative to the main portion of the respective leg.

Abstract: Disclosed herein is a superconducting field coil of a homopolar type superconducting synchronous machine. The superconducting synchronous machine includes a superconducting field coil which comprises a single or double pancake coil formed by winding a superconducting wire, a core-type rotor which is made of a magnetic material, and an armature winding excited to three phases on a surface of a core of a stator. The field coil of the homopolar type superconducting synchronous machine is not rotated when the machine is in operation. Thus, there is no part for coupling the rotating field coil to a stationary cryo-cooler for cooling a refrigerant, so that the structure is simple, reliability is high, and various cooling methods are available.

Abstract: A magnetic motor that comprises two assemblies, a rotor assembly (built up arrangement of rotor discs populated with permanent magnets) spaced in circular fashion on or about the disc and a stator assembly (built up arrangement of stator discs or planes populated with groups of permanent magnets spaced apart in circular fashion) so that the magnets on the rotor disc can move between the stator magnet groups in the same plane during rotation of the rotor assembly. The rotor (rotor discs) are connected to a common shaft (drive shaft) mounted on bearings to the mainframe to allow relative motion (rotation between the rotor and the stator).

Abstract: The invention relates to a module (6) for primary parts (12) of synchronous motors (7, 8, 13) which are excited by permanent magnets, which comprise at least one secondary part (9) which is at least sectionally devoid of permanent magnets. Said secondary part (9) is made of an iron structure comprising teeth (11) which leads to the primary part (12). Said module (6) comprises at least one permanent magnet (1, 14) and at least one iron rod (2) which is arranged on the opposite sides. Recesses (3) are arranged between the iron rod (2) on one side and at least one winding (5) is guided about the iron rod (2). An additional module (6) can be secured at least to one side of the module (6) such that the iron rod (2) engages in the recesses (3) of the adjacent module (6) and the modules (6) can be placed together in relation to various predetermined primary parts (12).

Abstract: A rotating shaft is accommodated in a case. A ferromagnetic portion is formed on the rotating shaft, and electromagnets are provided to the case. Many projecting portions are formed so as to be arranged in a direction along which the movement of the rotating shaft is required to be regulated. Furthermore, Many projecting portions are likewise formed on the ferromagnetic portion. According to this construction, magnetic flux occurring in the electromagnets concentrates, so that restoring force occurs in the axial direction with suppressing reduction of the attractive force in a radial direction to the ferromagnetic portion. Therefore, the movement in the axial direction of the rotating shaft can be regulated.

Abstract: A motor and a control unit therefor comprise: salient rotor poles and salient stator poles, which are arranged along circumferences of phases A, B and C with an even interval therebetween; magnetic paths for passing magnetic fluxes, the paths permitting the magnetic fluxes passing through the salient rotor and stator poles of each phase to return to the rotor side; and substantially looped windings arranged between the salient stator poles of individual phases and the magnetic paths for passing magnetic fluxes, wherein currents are supplied to the windings in synchronization with the rotational position of the rotor to thereby output torque. Since the structures of the stator, the rotor and the windings are simple, productivity is enhanced, whereby high quality, small size and low cost can be realized.

Abstract: Disclosed herein is to a flux reversal motor. The flux reversal motor includes a mover, and a plurality of permanent magnets. The mover moves linearly relative to a stator. A plurality of permanent magnets, having identical polarities, is provided in the end of each mover tooth. The permanent magnets are arranged on the left and right sides of a protrusion of the end of the mover tooth. Thus low noise/low vibration, high speeds, high precision, and high thrust motion can be realized.

Abstract: An electro-magnetic circular engine in which the motive force is electro-magnetism. The electro-magnetic circular engine comprises a hub assembly, first and second electro-magnetic wheels, electro-magnetic means, and electrical means. The electro-magnetic circular engine includes the rotation of the hub assembly in a predetermined direction continuously after the initial activation of the hub assembly by assembly of applying a short period of the external force, such as from a starter. At least three alternators are connected to the rotating shaft and work at a minimum of 35 amps to over 600 amps each and recharge batteries.

Abstract: The present invention is a system and method for utilizing magnetic energy. The basic principles of the present invention may be implemented in a variety of systems and methods. A magnet may be rotated or an electromagnet may be controlled in order to control a magnetic field generated by a set of magnets. As a result, numerous, substantial benefits may be achieved by providing at least one set of multiple magnets. For example, the present invention may be used in systems and methods to perform a variety of functions including, but not limited to: (1) to control, manipulate, hold, and/or release a load; (2) to open and/or close a pathway; (3) to open and/or close a circuit; (4) to apply a magnetic field to a load and/or to remove a magnetic field from a load; (5) to intermittently apply and remove a magnetic field; (6) to increase the magnetic field that may be applied to a load; (7) to induce a load into motion; (8) to create energy; and (9) to improve the energy efficiency of a device or system.

Abstract: To ensure that liquid and/or vapours do not escape from a tank space during cleaning by means of cleaning equipment, a housing (2) is provided with magnetic coupling equipment according to the invention, comprising two cooperating pole elements (8,9) which extend hermetically isolated from each other with pole parts extending in the turbine housing (3) on the tank space side and the gear housing (1) itself outside the tank space, respectively. This provides a considerable degree of security against liquid and gas leakage, while making it possible to achieve a compact structure with easy access for service and maintenance.

Abstract: An electro-magnetic circular engine in which the motive force is electro-magnetism. The electro-magnetic circular engine comprises a hub assembly, first and second electro-magnetic wheels, electro-magnetic means, and electrical means. The electro-magnetic circular engine includes the rotation of the hub assembly in a predetermined direction continuously after the initial activation of the hub assembly by assembly of applying a short period of the external force, such as from a starter. At least three alternators are connected to the rotating shaft and work at a minimum of 35 amps to over 600 amps each and recharge batteries.

Abstract: There is provided a magnetic motor which comprises a rotation assembly having a rotation axis and a plurality of rotating bodies fixedly installed at an interval along the rotation axis and magnetized to have multipole; one or more electromagnets, installed in a region influenced by a magnetic field derived from the adjacent rotating bodies, whereby the rotating assembly is driven by magnetic repulsive and attractive forces between the rotating bodies and the one or more electromagnets; and a controller for sequentially controlling magnetization of the electromagnets.

Abstract: A primary disc and the secondary discs are each fitted with magnetic means, typically in the form of permanent magnets of the same polarity, located along a radial line from the centre point of the discs, and arranged generally transverse to the axis of rotation of the respective disc. As shown in the drawings, these magnets are also located at or adjacent to the periphery of the disc(s). The magnets are embedded into each of the primary and secondary discs such that the faces of the magnets are flush with the exterior faces of the primary and secondary discs. In the embodiment, each of the magnets embedded in the primary disc has a North pole which is aligned with a North pole of a magnet embedded in the secondary disc. Each of the South pole of those magnets embedded in the primary disc has a South pole which is aligned with a South pole of a magnet embedded in the other secondary disc.

Abstract: A motor used to drive optical elements includes a stator, a rotor revolved relative to the stator, and a feedback apparatus used to sense the position of the rotor. The feedback apparatus is an encoder. The invention utilizes such described structure so as to eliminate the system's instability caused by the drift of the conventional capacitive type transducer or an inductance type transducer. Moreover, the response of the motor used to drive optical elements has been improved greatly by utilizing multipole motor.

Abstract: Using this invention, no input fuel is required to sustain operation of electric generators and other machines and devices. This is done using a magnetic motor that has parallel and perpendicular, rotatable shafts and gears to which those generators and other machines are connected along with equally spaced, perpendicular extensions having permanent magnets attached to those extensions and arranged so as to allow repelling magnetic interaction; and where the shafts also have ways of maintaining required spacing and rotational timing to allow the magnets to interact in precise and extremely close proximity a number of times per rotation causing perpetual movement.

Abstract: A magnetic motor which includes an elongated, horizontally disposed frame having a drive shaft rotatably mounted therein with the drive shaft being supported at its opposite ends by titanium bearing blocks. Opposing first and second slide panels having bar magnets at the inner surfaces thereof are movably mounted on the frame and are movable towards the drive shaft which has magnets mounted thereon in a helical fashion. As the slide panels with the magnets thereon are moved towards the drive shaft, the magnets on the slide panels will cause the magnets on the drive shaft to be repelled thereby causing the rotation of the drive shaft. Movement of the slide panels is controlled by actuators.

Abstract: A turbocharger comprises a turbine wheel and a compressor wheel mounted to a turbocharger shaft. An electric induction motor is provided for assisting rotation of the compressor wheel in predetermined circumstances. The motor comprises a fixed stator having motor field coils which generate a rotating magnetic field when energised by an AC control signal which induces eddy current flow in a rotor to generate a rotor magnetic field which in turn interacts with the stator magnetic field producing torque in the rotor.

Abstract: A high efficiency, low maintenance single stage or multi-stage centrifugal compressor assembly for large cooling installations. The assembly is highly efficient by virtue of a variable frequency drive (VFD) that drives a permanent magnet motor and matches compressor speed with compressor load, a direct drive impeller that eliminates gearing losses, and magnetic bearings that reduce frictional losses. The back-emf produced by the motor provides an intermediate power source for the magnetic bearings in the event of a loss of electrical power. A cooling system provides direct cooling of the rotor with gas refrigerant, and cooling of the stator with liquid refrigerant. Modular construction allows the compressor to be retrofit with upgrades. An inlet guide vane system operates without need for oil lubrication. The use of light metal castings and elimination of gearing reduces the weight to one-third or less of comparably powered conventional units.

Abstract: The invention relates to a spindle motor having a stationary part and a rotating part that are rotatably supported with respect to each other by means of radial and axial bearing systems, the radial bearing system being a fluid bearing and the rotating part being driven by an electromagnetic drive system. The spindle motor is characterized in that the axial bearing system is designed as a magnetic bearing and that it operates against a magnetic preload.

Abstract: A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface of the ferromagnetic material grains, wherein an amount of iron atoms in the fluorine compound particles is 1 to 50 atomic %.

Abstract: A magnetic conducting housing of a motor includes a body and at least one first positioning structure. The magnetic conducting housing has a magnetic element disposed around an inner wall thereof. The body has a top surface and a side wall connected with a circumference of the top surface to form an opening. The first positioning structure extends from the side wall of the body and is close to the opening for holding the magnetic element. Also, a motor and a fan with above-mentioned magnetic conducting housing are disclosed.