Connect public, paid and private patent data with Google Patents Public Datasets

Transverse and/or commutated flux system stator concepts

Download PDF

Info

Publication number
US20110273035A1
US20110273035A1 US13187744 US201113187744A US2011273035A1 US 20110273035 A1 US20110273035 A1 US 20110273035A1 US 13187744 US13187744 US 13187744 US 201113187744 A US201113187744 A US 201113187744A US 2011273035 A1 US2011273035 A1 US 2011273035A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
flux
stator
machine
exemplary
commutated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13187744
Inventor
David G. Calley
Thomas F. Janecek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Torque Machines Inc
Original Assignee
MOTOR EXCELLENCE LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K41/00Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02Linear motors; Sectional motors
    • H02K41/025Asynchronous motors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/24Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246Variable reluctance rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K37/00Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/02Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of variable reluctance type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/02Details of the magnetic circuit characterised by the magnetic material
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/04Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2201/00Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/12Transversal flux machines
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2201/00Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/15Sectional machines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49009Dynamoelectric machine
    • Y10T29/49012Rotor

Abstract

Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain exemplary stators for use in transverse and commutated flux machines may be configured with gaps therebetween, for example in order to counteract tolerance stackup. Other exemplary stators may be configured as partial stators having a limited number of magnets and/or flux concentrators thereon. Partial stators may facilitate ease of assembly and/or use with various rotors. Additionally, exemplary floating stators can allow a transverse and/or commutated flux machine to utilize an air gap independent of the diameter of a rotor. Via use of such exemplary stators, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • [0001]
    This application is a continuation of U.S. Ser. No. 12/942,495 filed on Nov. 9, 2010, now U.S. Patent Application Publication No. 2011/0050010 entitled “TRANSVERSE AND/OR COMMUTATED FLUX SYSTEM STATOR CONCEPTS”.
  • [0002]
    U.S. Ser. No. 12/942,495 is a divisional of U.S. Ser. No. 12/611,728 filed on Nov. 3, 2009, now U.S. Pat. No. 7,851,965 entitled “TRANSVERSE AND/OR COMMUTATED FLUX SYSTEM STATOR CONCEPTS”.
  • [0003]
    U.S. Ser. No. 12/611,728 is a non-provisional of U.S. Provisional No. 61/110,874 filed on Nov. 3, 2008 and entitled “ELECTRICAL OUTPUT GENERATING AND DRIVEN ELECTRICAL DEVICES USING COMMUTATED FLUX AND METHODS OF MAKING AND USE THEREOF INCLUDING DEVICES WITH TRUNCATED STATOR PORTIONS.”
  • [0004]
    U.S. Ser. No. 12/611,728 is also a non-provisional of U.S. Provisional No. 61/110,879 filed on Nov. 3, 2008 and entitled “ELECTRICAL OUTPUT GENERATING AND DRIVEN ELECTRICAL DEVICES USING COMMUTATED FLUX AND METHODS OF MAKING AND USE THEREOF.”
  • [0005]
    U.S. Ser. No. 12/611,728 is also a non-provisional of U.S. Provisional No. 61/110,884 filed on Nov. 3, 2008 and entitled “METHODS OF MACHINING AND USING AMORPHOUS METALS OR OTHER MAGNETICALLY CONDUCTIVE MATERIALS INCLUDING TAPE WOUND TORROID MATERIAL FOR VARIOUS ELECTROMAGNETIC APPLICATIONS.”
  • [0006]
    U.S. Ser. No. 12/611,728 is also a non-provisional of U.S. Provisional No. 61/110,889 filed on Nov. 3, 2008 and entitled “MULTI-PHASE ELECTRICAL OUTPUT GENERATING AND DRIVEN ELECTRICAL DEVICES WITH TAPE WOUND CORE LAMINATE ROTOR OR STATOR ELEMENTS, AND METHODS OF MAKING AND USE THEREOF.”
  • [0007]
    U.S. Ser. No. 12/611,728 is also a non-provisional of U.S. Provisional No. 61/114,881 filed on Nov. 14, 2008 and entitled “ELECTRICAL OUTPUT GENERATING AND DRIVEN ELECTRICAL DEVICES USING COMMUTATED FLUX AND METHODS OF MAKING AND USE THEREOF.”
  • [0008]
    U.S. Ser. No. 12/611,728 is also a non-provisional of U.S. Provisional No. 61/168,447 filed on Apr. 10, 2009 and entitled “MULTI-PHASE ELECTRICAL OUTPUT GENERATING AND DRIVEN ELECTRICAL DEVICES, AND METHODS OF MAKING AND USING THE SAME.” The entire contents of all of the foregoing applications are hereby incorporated by reference.
  • TECHNICAL FIELD
  • [0009]
    The present disclosure relates to electrical systems, and in particular to transverse flux machines and commutated flux machines.
  • BACKGROUND
  • [0010]
    Motors and alternators are typically designed for high efficiency, high power density, and low cost. High power density in a motor or alternator may be achieved by operating at high rotational speed and therefore high electrical frequency. However, many applications require lower rotational speeds. A common solution to this is to use a gear reduction. Gear reduction reduces efficiency, adds complexity, adds weight, and adds space requirements. Additionally, gear reduction increases system costs and increases mechanical failure rates.
  • [0011]
    Additionally, if a high rotational speed is not desired, and gear reduction is undesirable, then a motor or alternator typically must have a large number of poles to provide a higher electrical frequency at a lower rotational speed. However, there is often a practical limit to the number of poles a particular motor or alternator can have, for example due to space limitations. Once the practical limit is reached, in order to achieve a desired power level the motor or alternator must be relatively large, and thus have a corresponding lower power density.
  • [0012]
    Moreover, existing multipole windings for alternators and electric motors typically require winding geometry and often complex winding machines in order to meet size and/or power needs. As the number of poles increases, the winding problem is typically made worse. Additionally, as pole count increases, coil losses also increase (for example, due to resistive effects in the copper wire or other material comprising the coil). However, greater numbers of poles have certain advantages, for example allowing a higher voltage constant per turn, providing higher torque density, and producing voltage at a higher frequency.
  • [0013]
    Most commonly, electric motors are of a radial flux type. To a far lesser extent, some electric motors are implemented as transverse flux machines and/or commutated flux machines. It is desirable to develop improved electric motor and/or alternator performance and/or configurability. In particular, improved transverse flux machines and/or commutated flux machines are desirable.
  • SUMMARY
  • [0014]
    This disclosure relates to transverse and/or commutated flux machines. In an exemplary embodiment, an electrical machine comprises a partial stator assembly comprising a flux concentrator, a first magnet connected to a first side of the flux concentrator, and a second magnet connected to a second side of the flux concentrator opposite the first side. The first magnet and the second magnet are magnetically oriented such that a common magnetic pole is present on the first and second sides of the flux concentrator. The electrical machine further comprises a conductive coil at least partially enclosed by the partial stator assembly. The conductive coil is configured with a single winding configuration, and the electrical machine is at least one of a transverse flux machine or a commutated flux machine.
  • [0015]
    In another exemplary embodiment, a method of manufacturing an electrical machine comprises coupling a conductive coil to a partial stator assembly in a single winding configuration, and coupling a rotor to the partial stator assembly. The electrical machine is at least one of a transverse flux machine or a commutated flux machine.
  • [0016]
    In another exemplary embodiment, a method for generating electricity comprises coupling an electrical machine to a load. The electrical machine comprises a partial stator assembly, a conductive coil configured with a single winding configuration, and a rotor coupled to the partial stator assembly. The electrical machine is at least one of a transverse flux machine or a commutated flux machine. The method further comprises rotating the rotor to induce a voltage in the conductive coil.
  • [0017]
    The contents of this summary section are provided only as a simplified introduction to the disclosure, and are not intended to be used to limit the scope of the appended claims.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0018]
    With reference to the following description, appended claims, and accompanying drawings:
  • [0019]
    FIG. 1A illustrates an exemplary transverse flux machine in accordance with an exemplary embodiment;
  • [0020]
    FIG. 1B illustrates an exemplary commutated flux machine in accordance with an exemplary embodiment;
  • [0021]
    FIG. 2A illustrates an exemplary axial gap configuration in accordance with an exemplary embodiment;
  • [0022]
    FIG. 2B illustrates an exemplary radial gap configuration in accordance with an exemplary embodiment;
  • [0023]
    FIG. 3A illustrates an exemplary cavity engaged configuration in accordance with an exemplary embodiment;
  • [0024]
    FIG. 3B illustrates an exemplary face engaged configuration in accordance with an exemplary embodiment;
  • [0025]
    FIG. 3C illustrates an exemplary face engaged axial gap configuration in accordance with an exemplary embodiment;
  • [0026]
    FIG. 4 illustrates various motor performance curves in accordance with an exemplary embodiment;
  • [0027]
    FIG. 5 illustrates, in a cut-away view, an exemplary transverse flux machine configured for use in a vehicle in accordance with an exemplary embodiment;
  • [0028]
    FIG. 6 illustrates a side perspective view of an exemplary commutated flux machine section in accordance with an exemplary embodiment;
  • [0029]
    FIG. 7 illustrates a perspective view of an exemplary gapped stator coupled with an exemplary rotor and coil in accordance with an exemplary embodiment;
  • [0030]
    FIGS. 8A-8C illustrate exemplary partial stators coupled to a rotor in accordance with an exemplary embodiment;
  • [0031]
    FIGS. 9A-9C illustrate exemplary partial stators and truncated coils coupled to an exemplary electronics board in accordance with an exemplary embodiment; and
  • [0032]
    FIGS. 10A-10B illustrate an exemplary floating stator in accordance with an exemplary embodiment.
  • DETAILED DESCRIPTION
  • [0033]
    While exemplary embodiments are described herein in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that logical electrical, magnetic, and/or mechanical changes may be made without departing from the spirit and scope of the present disclosure. Thus, the following descriptions are not intended as a limitation on the use or applicability of the present disclosure, but instead, are provided merely to enable a full and complete description of exemplary embodiments.
  • [0034]
    For the sake of brevity, conventional techniques for electrical system construction, management, operation, measurement, optimization, and/or control, as well as conventional techniques for magnetic flux utilization, concentration, control, and/or management, may not be described in detail herein. Furthermore, the connecting lines shown in various figures contained herein are intended to represent exemplary functional relationships and/or physical couplings between various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in a practical electrical system, for example an AC synchronous electric motor.
  • [0035]
    Prior electric motors, for example conventional DC brushless motors, suffer from various deficiencies. For example, many electric motors are inefficient at various rotational speeds and/or loads, for example low rotational speeds. Thus, the motor is typically operated within a narrow RPM range and/or load range of suitable efficiency. In these configurations, gears or other mechanical approaches may be required in order to obtain useful work from the motor.
  • [0036]
    Moreover, many electric motors have a low pole count. Because power is a function of torque and RPM, such motors must often be operated at a high physical RPM in order to achieve a desired power density and/or electrical frequency. Moreover, a higher power density (for example, a higher kilowatt output per kilogram of active electrical and magnetic motor mass) optionally is achieved by operating the motor at high rotational speed and therefore high electrical frequency. However, high electrical frequency can result in high core losses and hence lower efficiency. Moreover, high electrical frequency can result in increased cost, increased mechanical complexity, and/or decreased reliability. Additionally, high electrical frequency and associated losses create heat that may require active cooling, and can limit the operational range of the motor. Heat can also degrade the life and reliability of a high frequency machine.
  • [0037]
    Still other electric motors contain large volumes of copper wire or other coil material. Due to the length of the coil windings, resistive effects in the coil lead to coil losses. For example, such losses convert a portion of electrical energy into heat, reducing efficiency and potentially leading to thermal damage to and/or functional destruction of the motor.
  • [0038]
    Moreover, many prior electric motors offered low torque densities. As used herein, “torque density” refers to Newton-meters produced per kilogram of active electrical and magnetic materials. For example, many prior electric motors are configured with a torque density from about 0.5 Newton-meters per kilogram to about 3 Newton-meters per kilogram. Thus, a certain electric motor with a torque density of 1 Newton-meter per kilogram providing, for example, 10 total Newton-meters of torque may be quite heavy, for example in excess of 10 kilograms of active electrical and magnetic materials. Similarly, another electric motor with a torque density of 2 Newton-meters per kilogram providing, for example, 100 total Newton-meters of torque may also be quite heavy, for example in excess of 50 kilograms of active electrical and magnetic materials. As can be appreciated, the total weight of these electric motors, for example including weight of frame components, housings, and the like, may be significantly higher. Moreover, such prior electric motors are often quite bulky as a result of the large motor mass. Often, a motor of sufficient torque and/or power for a particular application is difficult or even impossible to fit in the available area.
  • [0039]
    Even prior transverse flux machines have been unable to overcome these difficulties. For example, prior transverse flux machines have suffered from significant flux leakage. Still others have offered torque densities of only a few Newton-meters per kilogram of active electrical and magnetic materials. Moreover, various prior transverse flux machines have been efficiently operable only within a comparatively narrow RPM and/or load range. Additionally, using prior transverse flux machines to generate substantial output power often required spinning relatively massive and complicated components (i.e., those involving permanent magnets and/or relatively exotic, dense and/or expensive flux concentrating or conducting materials) at high rates of speed. Such high-speed operation requires additional expensive and/or complicated components for support and/or system reliability. Moreover, many prior transverse flux machines are comparatively expensive and/or difficult to manufacture, limiting their viability.
  • [0040]
    In contrast, various of these problems can be solved by utilizing transverse flux machines configured in accordance with principles of the present disclosure. As used herein, a “transverse flux machine” and/or “commutated flux machine” may be any electrical machine wherein magnetic flux paths have sections where the flux is generally transverse to a rotational plane of the machine. In an exemplary embodiment, when a magnet and/or flux concentrating components are on a rotor and/or are moved as the machine operates, the electrical machine may be a pure “transverse” flux machine. In another exemplary embodiment, when a magnet and/or flux concentrating components are on a stator and/or are held stationary as the machine operates, the electrical machine may be a pure “commutated” flux machine. As is readily apparent, in certain configurations a “transverse flux machine” may be considered to be a “commutated flux machine” by fixing the rotor and moving the stator, and vice versa. Moreover, a coil may be fixed to a stator; alternatively, a coil may be fixed to a rotor.
  • [0041]
    Moreover, there is a spectrum of functionality and device designs bridging the gap between a commutated flux machine and a transverse flux machine. Certain designs may rightly fall between these two categories, or be considered to belong to both simultaneously. Therefore, as will be apparent to one skilled in the art, in this disclosure a reference to a “transverse flux machine” may be equally applicable to a “commutated flux machine” and vice versa.
  • [0042]
    Moreover, transverse flux machines and/or commutated flux machines may be configured in multiple ways. For example, with reference to FIG. 2A, a commutated flux machine may be configured with a stator 210 generally aligned with the rotational plane of a rotor 250. Such a configuration is referred to herein as “axial gap.” In another configuration, with reference to FIG. 2B, a commutated flux machine may be configured with stator 210 rotated about 90 degrees with respect to the rotational plane of rotor 250. Such a configuration is referred to herein as “radial gap.”
  • [0043]
    With reference now to FIG. 3A, a flux switch 352 in a commutated flux machine may engage a stator 310 by extending at least partially into a cavity defined by stator 310. Such a configuration is referred to herein as “cavity engaged.” Turning to FIG. 3B, flux switch 352 in a commutated flux machine may engage stator 310 by closely approaching two terminal faces of stator 310. Such a configuration is referred to herein as “face engaged.” Similar engagement approaches may be followed in transverse flux machines and are referred to in a similar manner.
  • [0044]
    In general, a transverse flux machine and/or commutated flux machine comprises a rotor, a stator, and a coil. A flux switch may be located on the stator or the rotor. As used herein, a “flux switch” may be any component, mechanism, or device configured to open and/or close a magnetic circuit. (i.e., a portion where the permeability is significantly higher than air). A magnet may be located on the stator or the rotor. A coil is at least partially enclosed by the stator or the rotor. Optionally, flux concentrating portions may be included on the stator and/or the rotor. With momentary reference now to FIG. 1A, an exemplary transverse flux machine 100A may comprise a rotor 150A, a stator 110A, and a coil 120A. In this exemplary embodiment, a magnet may be located on rotor 150A. With momentary reference now to FIG. 1B, an exemplary commutated flux machine 100B may comprise a rotor 150B, a stator 110B, and a coil 120B. In this exemplary embodiment, a magnet may be located on stator 110B.
  • [0045]
    Moreover, a transverse flux machine and/or commutated flux machine may be configured with any suitable components, structures, and/or elements in order to provide desired electrical, magnetic, and/or physical properties. For example, a commutated flux machine having a continuous, thermally stable torque density in excess of 50 Newton-meters per kilogram may be achieved by utilizing a polyphase configuration. As used herein, “continuous, thermally stable torque density” refers to a torque density maintainable by a motor, without active cooling, during continuous operation over a period of one hour or more. Moreover, in general, a continuous, thermally stable torque density may be considered to be a torque density maintainable by a motor for an extended duration of continuous operation, for example one hour or more, without thermal performance degradation and/or damage.
  • [0046]
    Moreover, a transverse flux machine and/or commutated flux machine may be configured to achieve low core losses. By utilizing materials having high magnetic permeability, low coercivity, low hysteresis losses, low eddy current losses, and/or high electrical resistance, core losses may be reduced. For example, silicon steel, powdered metals, plated powdered metals, soft magnetic composites, amorphous metals, nanocrystalline composites, and/or the like may be utilized in rotors, stators, switches, and/or other flux conducting components of a transverse flux machine and/or commutated flux machine. Eddy currents, flux leakage, and other undesirable properties may thus be reduced.
  • [0047]
    A transverse flux machine and/or commutated flux machine may also be configured to achieve low core losses by varying the level of saturation in a flux conductor, such as in an alternating manner. For example, a flux conducting element in a stator may be configured such that a first portion of the flux conducting element saturates at a first time during operation of the stator. Similarly, a second portion of the same flux conducting element saturates at a second time during operation of the stator. In this manner, portions of the flux conducting element have a level of magnetic flux density significantly below the saturation induction from time to time, reducing core loss. For example, significant portions of the flux conducting element may have a level of flux density less than 25% of the saturation induction within the 50% of the time of its magnetic cycle. Moreover, any suitable flux density variations may be utilized.
  • [0048]
    Furthermore, a transverse flux machine and/or commutated flux machine may be configured to achieve low coil losses. For example, in contrast to a conventional electric motor utilizing a mass of copper C in one or more coils in order to achieve a desired output power P, a particular transverse flux machine and/or commutated flux machine may utilize only a small amount of copper C (for example, one-tenth as much copper C) while achieving the same output power P. Additionally, a transverse flux machine and/or commutated flux machine may be configured to utilize coil material in an improved manner (for example, by reducing and/or eliminating “end turns” in the coil). In this manner, resistive losses, eddy current losses, thermal losses, and/or other coil losses associated with a given coil mass C may be reduced. Moreover, within a transverse flux machine and/or commutated flux machine, a coil may be configured, shaped, oriented, aligned, manufactured, and/or otherwise configured to further reduce losses for a given coil mass C.
  • [0049]
    Additionally, in accordance with principles of the present disclosure, a transverse flux machine and/or commutated flux machine may be configured to achieve a higher voltage constant. In this manner, the number of turns in the machine may be reduced, in connection with a higher frequency. A corresponding reduction in coil mass and/or the number of turns in the coil may thus be achieved.
  • [0050]
    Yet further, in accordance with principles of the present disclosure, a transverse flux machine and/or commutated flux machine may be configured to achieve a high flux switching frequency, for example a flux switching frequency in excess of 1000 Hz. Because flux is switched at a high frequency, torque density may be increased.
  • [0051]
    With reference now to FIG. 4, a typical conventional electric motor efficiency curve 402 for a particular torque is illustrated. Revolutions per minute (RPM) is illustrated on the X axis, and motor efficiency is illustrated on the Y axis. As illustrated, a conventional electric motor typically operates at a comparatively low efficiency at low RPM. For this conventional motor, efficiency increases and then peaks at a particular RPM, and eventually falls off as RPM increases further. As a result, many conventional electric motors are often desirably operated within an RPM range near peak efficiency. For example, one particular prior art electric motor may have a maximum efficiency of about 90% at about 3000 RPM, but the efficiency falls off dramatically at RPMs that are not much higher or lower.
  • [0052]
    Gearboxes, transmissions, and other mechanical mechanisms are often coupled to an electric motor to achieve a desired output RPM or other output condition. However, such mechanical components are often costly, bulky, heavy, and/or impose additional energy losses, for example frictional losses. Such mechanical components can reduce the overall efficiency of the motor/transmission system. For example, an electric motor operating at about 90% efficiency coupled to a gearbox operating at about 70% efficiency results in a motor/gearbox system having an overall efficiency of about 63%. Moreover, a gearbox may be larger and/or weigh more or cost more than the conventional electric motor itself. Gearboxes also reduce the overall reliability of the system.
  • [0053]
    In contrast, with continuing reference to FIG. 4 and in accordance with principles of the present disclosure, a transverse and/or commutated flux machine efficiency curve 404 for a particular torque is illustrated. In accordance with principles of the present disclosure, a transverse and/or commutated flux machine may rapidly reach a desirable efficiency level (for example, 80% efficiency or higher) at an RPM lower than that of a conventional electric motor. Moreover, the transverse and/or commutated flux machine may maintain a desirable efficiency level across a larger RPM range than that of a conventional electric motor. Additionally, the efficiency of the transverse and/or commutated flux machine may fall off more slowly past peak efficiency RPM as compared to a conventional electric motor.
  • [0054]
    Furthermore, in accordance with principles of the present disclosure, a transverse and/or commutated flux machine may achieve a torque density higher than that of a conventional electric motor. For example, in an exemplary embodiment a transverse and/or commutated flux machine may achieve a continuous, thermally stable torque density in excess of 100 Newton-meters per kilogram.
  • [0055]
    Thus, in accordance with principles of the present disclosure, a transverse and/or commutated flux machine may desirably be employed in various applications. For example, in an automotive application, a transverse and/or commutated flux machine may be utilized as a wheel hub motor, as a direct driveline motor, and/or the like. Moreover, in an exemplary embodiment having a sufficiently wide operational RPM range, particularly at lower RPMs, a transverse and/or commutated flux machine may be utilized in an automotive application without need for a transmission, gearbox, and/or similar mechanical components.
  • [0056]
    An exemplary electric or hybrid vehicle embodiment comprises a transverse flux motor for driving a wheel of the vehicle, wherein the vehicle does not comprise a transmission, gearbox, and/or similar mechanical component(s). In this exemplary embodiment, the electric or hybrid vehicle is significantly lighter than a similar vehicle that comprises a transmission-like mechanical component. The reduced weight may facilitate an extended driving range as compared to a similar vehicle with a transmission like mechanical component. Alternatively, weight saved by elimination of the gearbox allows for utilization of additional batteries for extended range. Moreover, weight saved by elimination of the gearbox allows for additional structural material for improved occupant safety. In general, a commutated flux machine having a broad RPM range of suitable efficiency may desirably be utilized in a variety of applications where a direct-drive configuration is advantageous. For example, a commutated flux machine having an efficiency greater than 80% over an RPM range from only a few RPMs to about 2000 RPMs may be desirably employed in an automobile.
  • [0057]
    Moreover, the exemplary transmissionless electric or hybrid vehicle may have a higher overall efficiency. Stated otherwise, the exemplary vehicle may more efficiently utilize the power available in the batteries due to the improved efficiency resulting from the absence of a transmission-like component between the motor and the wheel of the vehicle. This, too, is configured to extend driving range and/or reduce the need for batteries.
  • [0058]
    Additionally, the commutated flux machine is configured to have a high torque density. In accordance with principles of the present disclosure, the high torque density commutated flux machine is also well suited for use in various applications, for example automotive applications. For example, a conventional electric motor may have a torque density of between about 0.5 to about 3 Newton-meters per kilogram. Additional techniques, for example active cooling, can enable a conventional electric motor to achieve a torque density of up to about 50 Newton-meters per kilogram. However, such techniques typically add significant additional system mass, complexity, bulk, and/or cost. Additionally, such conventional electric motors configured to produce comparatively high amounts of torque, for example the Siemens 1FW6 motor, are limited to comparatively low RPM operation, for example operation below 250 RPMs.
  • [0059]
    In contrast, in accordance with principles of the present disclosure, an exemplary passively cooled transverse flux machine and/or commutated flux machine may be configured with a continuous, thermally stable torque density in excess of 50 Newton-meters per kilogram. As used herein, “passively cooled” is generally understood to refer to systems without cooling components requiring power for operation, for example water pumps, oil pumps, cooling fans, and/or the like. Moreover, this exemplary transverse flux machine and/or commutated flux machine may be configured with a compact diameter, for example a diameter less than 14 inches. Another exemplary transverse flux machine and/or commutated flux machine may be configured with a continuous, thermally stable torque density in excess of 100 Newton-meters per kilogram and a diameter less than 20 inches. Accordingly, by utilizing various principles of the present disclosure, exemplary transverse flux machines and/or commutated flux machines may be sized and/or otherwise configured and/or shaped in a manner suitable for mounting as a wheel hub motor in an electric vehicle, because the transverse flux machine and/or commutated flux machine is significantly lighter and/or more compact than a conventional electric motor. In this manner, the unsprung weight of the resulting wheel/motor assembly can be reduced. This can improve vehicle handling and reduce the complexity and/or size of suspension components.
  • [0060]
    Further, in accordance with principles of the present disclosure, a transverse flux machine and/or commutated flux machine may desirably be utilized in an electromechanical system having a rotating portion, for example a washing machine or other appliance. In one example, a conventional washing machine typically utilizes an electric motor coupled to a belt drive to spin the washer drum. In contrast, a transverse flux machine and/or commutated flux machine may be axially coupled to the washer drum, providing a direct drive configuration and eliminating the belt drive element. Alternatively, a transverse flux machine and/or commutated flux machine, for example one comprising a partial stator, may be coupled to a rotor. The rotor may have a common axis as the washer drum. The rotor may also be coupled directly to the washer drum and/or integrally formed therefrom. In this manner, a transverse flux machine and/or commutated flux machine may provide rotational force for a washing machine or other similar electromechanical structures and/or systems.
  • [0061]
    Moreover, in accordance with principles of the present disclosure, a transverse flux machine and/or commutated flux machine may desirably be utilized to provide mechanical output to relatively lightweight vehicles such as bicycles, scooters, motorcycles, quads, golf carts, or other vehicles. Additionally, a transverse flux machine and/or commutated flux machine may desirably be utilized in small engine applications, for example portable generators, power tools, and other electrical equipment. A transverse flux machine and/or commutated flux machine may desirably be utilized to provide mechanical output to propeller-driven devices, for example boats, airplanes, and/or the like. A transverse flux machine and/or commutated flux machine may also desirably be utilized in various machine tools, for example rotating spindles, tables configured to move large masses, and/or the like. In general, transverse flux machines and/or commutated flux machines may be utilized to provide electrical and/or mechanical input and/or output to and/or from any suitable devices.
  • [0062]
    An electrical system, for example an electric motor, may be any system configured to facilitate the switching of magnetic flux. In accordance with an exemplary embodiment and with reference again to FIG. 1A, an electrical system, for example transverse flux machine 100A, generally comprises a rotor portion 150A, a stator portion 110A, and a coil 120A. Rotor portion 150A is configured to interact with stator portion 110A in order to facilitate switching of magnetic flux. Stator portion 110A is configured to be magnetically coupled to rotor portion 150A, and is configured to facilitate flow of magnetic flux via interaction with rotor portion 150A. Coil 120A is configured to generate an output responsive to flux switching and/or accept a current input configured to drive the rotor. Transverse flux machine 100A may also comprise various structural components, for example components configured to facilitate operation of transverse flux machine 100A. Moreover, transverse flux machine 100A may comprise any suitable components configured to support, guide, modify, and/or otherwise manage and/or control operation of transverse flux machine 100A and/or components thereof.
  • [0063]
    In accordance with an exemplary embodiment and with renewed reference to FIG. 1B, a commutated flux machine (CFM) system 100B comprises a stator 110 (for example, stator 110B), a rotor 150 (for example, rotor 150B), and a coil 120 (for example, coil 120B). In various embodiments, CFM system 100B has a generally circumferential stator which comprises multiple magnets 111B and flux concentrators 112B to form a complete circle. In an exemplary embodiment, stator 110B partially encloses coil 120B. Furthermore, rotor 150B has passive switching elements 151B, and rotates to interact with stator 110B and switch magnetic flux.
  • [0064]
    In an exemplary embodiment of the circumferential stator 110B, magnets 111B and flux concentrators 112B are arranged in alternating fashion. In one exemplary embodiment, magnets 111B are magnetically oriented in alternating directions while interleaving with flux concentrators 112B. Stated another way, magnets 111B may be arranged so that a north magnetic side of a particular magnet 111B is facing a north magnetic side of another magnet 111B, with a flux concentrator 112B therebetween. Likewise, a south magnetic side may be oriented facing another south magnetic side, separated by a flux concentrator 112B. The interleaving and alternating directions result in each flux concentrator 112B having a net magnetic pole.
  • [0065]
    In an exemplary embodiment, and with reference now to FIG. 5, a transverse and/or commutated flux machine may be implemented with multiple partial stators, for example as a wheel hub motor. For example, a transverse flux machine 500 may comprise a rotor 550, one or more coils 520 (shown as 520A and 520B), and one or more partial stators 510 (shown as 510A, 510B, and 510C). Moreover, via use of a plurality of partial stators, transverse flux machine 500 may be configured to produce polyphase output and/or operate responsive to polyphase input, for example when each of the plurality of partial stators correspond to a different phase.
  • [0066]
    With reference now to FIG. 6, in an exemplary embodiment a CFM stator unit 610 comprises a flux concentrator 612 and a magnet 611 that are both substantially C-shaped. The C-shaped components 611, 612 can be defined as having a first leg 615, a second leg 616, and a return portion 617 that connects to the first and second legs 615, 616. In an exemplary embodiment, CFM stator unit 610 is generally C-shaped to accommodate a substantially annular or doughnut shaped rotor portion 650 in a cavity engaged configuration. In another exemplary embodiment, CFM stator unit 610 is configured to be face engaged with rotor portion 650. Furthermore, in addition to C-shaped, in exemplary embodiments the shapes of the stator components may be U-shaped, rectangular, triangular, rounded cross-sectional shapes, and/or any other suitable shapes known to one skilled in the art.
  • [0067]
    In an exemplary embodiment, a stator further comprises a structural support that holds the magnets and flux concentrators for assembly and/or spacing. The structural support is designed to not interfere with the motion of the CFM system. In another exemplary embodiment, the stator further comprises cooling devices. The cooling devices may include radiative portions, conductive cooling portions, and/or the like. In yet another exemplary embodiment, the stator may also comprise components that measure certain characteristics of the device, such as Hall effect sensors and/or the like. Furthermore, in various exemplary embodiments the stator comprises components configured to drive the rotor.
  • [0068]
    With reference again to FIG. 6, CFM stator unit 610 may at least partially enclose a coil 620. Coil 620 may be any suitable height, width, and/or length to generate an electrical current responsive to flux switching in the stator. Coil 620 may also be any suitable height, width, and/or length configured to transfer a current to drive the rotor. In an embodiment, coil 620 is circular about an axis of rotation. In various exemplary embodiments, coil 620 has a diameter of between approximately 2 inches and approximately 36 inches in the plane of rotation. Moreover, coil 620 may have any suitable diameter, length, and/or other dimensions and/or geometries, as desired.
  • [0069]
    In an exemplary embodiment, coil 620 is coupled to an interior surface of concentrator 611. Moreover, in another exemplary embodiment, concentrator 611 is “wrapped” around coil 620 so that the interior surface of concentrator 611 is slightly larger than the height and width of coil 620 with as little as gap as possible. Coil 620 may also be desirably spaced away from and/or magnetically insulated from rotor switch 650, for example in order to reduce eddy currents and/or other induced effects in coil 620 responsive to flux switching near the surface of rotor switch 650.
  • [0070]
    In an exemplary embodiment, coil 620 is electrically coupled to a current source. The current source may be any suitable current source, but in one exemplary embodiment the current source is alternating power. It should be noted that coil 620 could be connected to be a source in general applications.
  • [0071]
    In an exemplary embodiment, coil 620 is generally constructed from copper. However, coil 620 may be made out of any suitable electrically conductive material and/or materials such as copper, silver, gold, aluminum, superconducting materials, and/or the like. In an exemplary embodiment, coil 620 is a loop. The loop is in contrast to windings, which may have greater losses than a single loop. Furthermore, coil 620 may be one solid piece, or may be made by coiling, layering, stacking, and/or otherwise joining many smaller strands or wires of electrically conductive material and/or low-loss materials together.
  • [0072]
    In accordance with an exemplary embodiment, the stator and rotor interact to create a magnetic flux circuit. Flux conduction is created, for example, by the switching elements of the rotor bridging the gap between opposite pole flux concentrators. In an exemplary embodiment, opposite pole flux concentrators are adjacent in the stator. In various exemplary embodiments, a flux path is created through the switching elements of the rotor. In another exemplary embodiment, a flux path is created through a magnet separating the adjacent flux concentrators. In an exemplary embodiment, AC synchronous flux flow is generated in response to similar flux conduction and flux paths being created simultaneously in adjacent flux concentrators. In another exemplary embodiment, asynchronous flux flow is generated in response to flux conduction and flux paths being created in adjacent flux concentrators at slightly delayed intervals.
  • [0073]
    In an exemplary generator embodiment, as the rotor moves into new position relative to the stator, flux flows in an opposite direction within the stator as compared to a prior position of the rotor. The change in flux direction causes the flux to be conducted around the coil in alternating directions. The alternating flux direction results in generation of alternating electrical output in the coil.
  • [0074]
    In an exemplary motor embodiment, the rotor is driven to rotate. The rotor movement is controlled, in an exemplary embodiment, by a control system which controls, for example, rotor RPM, axial positioning, acceleration, rotational direction, deceleration, starting, and/or stopping. In an exemplary embodiment, the rotor is driven in either direction (clockwise or counterclockwise), for example depending on a preference of an operator. The control system may further comprise programming memory, and a user interface, which may include graphics. The control system may include ports for coupling to additional electrical devices and/or may be coupled to additional electrical devices wirelessly. The control system may further comprise sensors for monitoring and measuring desired values of the system. These values may include one or more of phase matching, phase propagation, output waveforms, flux density, voltage constant, torque constant, webers of flux switched, RPM, system malfunctions, and/or the like. A power source may be coupled to the control system. This power source may be any suitable power source for operation of the control system, such as alternating current, direct current, capacitive charge, and/or inductance. In an exemplary embodiment, the power source is a DC battery.
  • [0075]
    Portions of rotor and/or stator elements may comprise any suitable flux conducting material and/or materials, such as steel, silicon steel, amorphous metals, metallic glass alloys, nanocrystalline composite, and powdered metals such as powdered iron.
  • [0076]
    In an exemplary embodiment, portions of a commutated and/or transverse flux machine, for example CFM system 100B, such as portions of the stator 110B or rotor 150B may be comprised of Metglas® brand amorphous metal products produced by Hitachi Metals America, for example Metglas® brand magnetic alloy 2605SA1 and/or the like. In general, such magnetic alloys have excellent flux conducing properties (e.g., permeability, for example, may be up to hundreds of thousands of times the permeability of silicon steel). Such magnetic alloys are also resistant to the effects of heat and losses), such as may occur with high speed operation of devices in accordance with aspects of the present disclosure. For example, losses for devices using such magnetic alloys, compared to using silicon steel, may be reduced from about 800 watts to about 30 watts or less, in some exemplary applications. Moreover, utilization of such magnetic alloys can allow for higher speed operation without the need for auxiliary cooling. For example, a device using magnetic alloy in place of silicon steel may be configured to achieve a continuous operation at a higher RPM, for example an RPM two times greater, five times greater, ten times greater, or even more. These features, in addition to other factors, allow the power to weight ratios of exemplary transverse and/or commutated flux devices to increase.
  • [0077]
    In certain exemplary embodiments, portions of CFM system 100B, such as portions of stator 110B or rotor 150B, may be comprised of stacked laminated steel. The orientation of the laminations may be varied to enhance flux transmission. For instance, certain laminations may be oriented in a radial direction. This approach may enhance mechanical strength and/or ease assembly. Alternatively, such as for a return portion in a flux conducting element of a stator, the surfaces of the laminations may be oriented parallel to the direction of flux transmission, thereby reducing eddy currents and/or other losses. Minimizing eddy current effects and/or otherwise enhancing flux transmission can be achieved using powdered iron; however, powdered iron generally does not conduct magnetic flux as efficiently as, for example, steel laminate (or other flux conducting material, such as Metglas® 2605SA1) and does not include the physical layer features potentially useful in minimizing or otherwise addressing eddy current and other losses. In addition, the use of powdered iron has the further drawback of increased hysteresis losses.
  • [0078]
    In an exemplary embodiment, portions of CFM system 100B, such as portions of the stator magnets, may comprise rare earth permanent magnets. Magnetic material may comprise any suitable material, for example neodymium-iron-boron (NIB) material. In an exemplary embodiment, the rare earth permanent magnets have a suitable magnetic field, for example a field in the range of 0.5 to 2.5 Tesla. In other exemplary embodiments, the stator magnets comprise inducted magnets and/or electromagnets. The inducted magnets and/or electromagnets may be made out of iron, iron alloys, metallic alloys, and/or the like, as well as other suitable materials as is known.
  • [0079]
    In an exemplary embodiment, a flux concentrator gathers the flux from one or more coupled magnets. A flux concentrator is typically made of some form of iron, such as silicon steel, powdered metals, amorphous metals, metallic glass alloys, nanocrystalline composite, and/or the like. Furthermore, in various exemplary embodiments, the flux concentrator may be made out of any suitable material, for example a material with a high permeability, high flux saturation, and/or high electrical resistance.
  • [0080]
    In addition to a circumferential CFM system as described, various other configurations of a CFM stator may be utilized. These other configurations include, but are not limited to, a gapped stator, a partial stator, and a floating stator.
  • [0081]
    In an exemplary embodiment and with reference now to FIG. 7, a gapped stator CFM system 700 comprises multiple commutated flux stator sections 701 assembled generally about the circumference of a coil 720 and a rotor 750. The gapped stator CFM system 700 further comprises a gap 702 between each of the multiple commutated flux stator sections 701. Furthermore, in an exemplary embodiment, a structural support (not shown) is located in gap 702 of gapped stator system 700.
  • [0082]
    In accordance with an exemplary embodiment, gapped stator CFM system 700 further comprises a support structure. The support structure holds multiple commutated flux stator sections 701 into place. In an exemplary embodiment, the support structure comprises several sections configured to hold the magnets and flux concentrators. Commutated flux stator sections 701 may be partitioned using spacers, for example portions of the support structure. The spacers may be configured to provide proper alignment of the multiple commutated flux stator sections 701. In an exemplary embodiment, the spacers are approximately as thick as a magnet in commutated flux stator sections 701. Moreover, the spacers may have any suitable thickness, as desired.
  • [0083]
    In various exemplary embodiments, the number of commutated flux stator sections 701 in gapped stator system 700 may range from 2 to 360 or more. The arc length of the multiple commutated flux stator sections 701 is less than the circumference of rotor 750. As defined herein, the arc length of multiple commutated flux stator sections 701 is the encompassed distance of rotor 750, not including the gap distance. In various exemplary embodiments, the total arc length of multiple commutated flux stator sections 701 is in the range of about 1% to about 95% of the circumference of rotor 750. In one embodiment, multiple commutated flux stator sections 701 are equally distributed about rotor 750 to form a substantially circumferential stator. In another embodiment, multiple commutated flux stator sections 701 are unequally distributed about rotor 750. For example, multiple commutated flux stator sections 701 may be located on only half of the circumference of rotor 750.
  • [0084]
    In another example, multiple commutated flux stator sections 701 are configured with uneven distances between each section. However, in an AC synchronous embodiment, multiple commutated flux stator sections 701 are typically located such that the switching portions of rotor 750 can magnetically engage each of multiple commutated flux stator sections 701. This can be accomplished, for example, by designing the distance between multiple commutated flux stator sections 701 to be a multiple of the distance between the switching elements of rotor 750.
  • [0085]
    In an exemplary embodiment, first magnet 711 has an outer edge parallel to, and opposite of, the interface between first magnet 711 and flux concentrator 712. Similarly, in the exemplary embodiment, second magnet 713 has an outer edge parallel to, and opposite of, the interface between second magnet 713 and flux concentrator 712. Stated another way, commutated flux stator section 701, in one embodiment, is “square” with respect to coil 720. In an exemplary embodiment, a “square” commutated flux stator section 701 facilitates manufacturing and assembly. In a modular approach, each commutated flux stator section 701 is manufactured with substantially flush inner cavities instead of rounded inner cavities. However, magnets 711, 713 and/or flux concentrator 712 can also be angled. For example, magnets 711, 713 might have a narrow first leg in comparison to the second leg, creating a tapered shape. Furthermore, flux concentrator 712 can also be tapered towards the axis of rotation of rotor 750. Moreover, magnets 711, 712 and/or flux concentrators 712 may be shaped, sized, and/or otherwise configured in any suitable manner, for example to achieve a desired torque density, output voltage waveform, and/or the like.
  • [0086]
    An advantage of a gapped stator configuration compared to a similar circumferential stator configuration is a decrease in weight. Another advantage is a decrease in the amount of magnetic material. Less magnetic material can result in a less expensive system. A decrease is weight is an advantage in various applications where a lower power is sufficient but extra weight is undesirable, for example due to structural stress.
  • [0087]
    In an exemplary embodiment, gaps 702 between commutated flux stator sections 701 are configured to provide ventilation for cooling. In other exemplary embodiments, various heat extraction devices such as heat sinks, other heat dispersive materials, fan blades, and/or other suitable devices may be added to and/or placed at least partially within gaps 702 between commutated flux stator sections 701.
  • [0088]
    Furthermore, in addition to cooling devices, other devices may be located in gaps 702 between commutated flux stator sections 701. In an exemplary embodiment, one or more measuring devices are located in gaps 702. The measuring devices, for example, may include devices to measure RPM, magnetic field strength, efficiency of the system, and/or the like.
  • [0089]
    Another advantage of gapped stator CFM system 700 is generally directed to assembly and/or repair of the stator. In an exemplary embodiment, commutated flux stator sections 701 are modular. Moreover, sections 701 may be separately removable and/or removable in multiple groups. Such a modular approach to assembly and/or disassembly results in easier replacement, as the removal and replacement of a section does not necessitate removing additional sections.
  • [0090]
    Also, the presence of gaps 702 enables a more forgiving manufacturing tolerance for gapped stator CFM system 700. For example, when alternating magnets and flux conducting elements are repeatedly stacked together, manufacturing tolerance variations can be cumulative, leading to magnets and/or flux conducting elements that are out of a desired alignment. By utilizing one or more gaps 702, the location of magnets and/or flux conducting elements can be periodically re-zeroed, eliminating tolerance stackup. As can be appreciated, less precisely manufactured components may thus be effectively utilized, reducing the expense of the system. Furthermore, the dimensions of gaps 702 may also be a function of at least one of an on-center distance between poles in gapped stator CFM system 700, a switch thickness of rotor 750, or the number of poles in gapped stator CFM system 700.
  • [0091]
    In addition to gapped stators disclosed above, principles of the present disclosure also contemplate “partial” or “truncated” stators. In accordance with an exemplary embodiment, a partial stator system comprises a stator that forms less than 360° coverage of a disk-shaped and/or annular rotor. In an exemplary embodiment, and with reference to FIG. 8A, a partial stator system 800 comprises a partial stator 810 and a rotor 850. Partial stator system 800 may be a portion of a fully circumferential stator design. For example, partial stator 810 may be coupled to less than 25% of the circumference of rotor 850. In another embodiment, partial stator 810 is coupled to less than 50% of the circumference of rotor 850. Moreover, partial stator 810 may at least partially enclose a portion of the circumference of rotor 850, for example a portion in the range of 1%-95%. In various embodiments, the range may be from 1%-75%, 2%-66%, or 5%-33%. Furthermore, the relationship with partial stator 810 and rotor 850 may be described in terms of relative arc lengths. For example, partial stator 810 may have an arc length less than 25% of the arc length of rotor 850.
  • [0092]
    In an exemplary embodiment and as illustrated in FIGS. 8B and 8C, a partial stator system 800 can also comprise gapped stator sections as previously described. In an exemplary embodiment, partial stator system 800 is an axial gap configuration, as shown in FIG. 2A. In another exemplary embodiment, partial stator system 800 is a radial gap configuration, as shown in FIG. 2B.
  • [0093]
    In various exemplary embodiments, partial stator system 800 is configured with an engagement between stator 810 and rotor 850. This engagement can be utilized for different purposes. For example, the engagement can be tailored for different sized rotors and/or different shaped rotors. Furthermore, in an exemplary embodiment the engagement is designed for at least one of: tailoring a voltage constant, tailoring a torque constant, tailoring a power density, or optimizing voltage and/or torque density for a specific application, and/or the like. Moreover, if partial stator system 800 comprises multiple stator sections, any particular stator section may be individually adjusted, for example for one of reasons set forth above.
  • [0094]
    Moreover, multiple partial stator sections may desirably be utilized, for example, in order to product polyphase output and/or respond to polyphase input. In various exemplary embodiments, multiple partial stator sections may be utilized, each corresponding to a different phase. However, any combination of partial stator sections and/or phases may be utilized, as desired.
  • [0095]
    In general, partial stator system 800 may be desirably utilized if an application requires less than the maximum power obtainable with a fully circumferential stator. In an exemplary embodiment, a number of commutated flux stator sections in partial stator system 800 can be customized to an application's requirements, for example a desired power output, efficiency, expense, and/or the like. In an exemplary embodiment, partial stator system 800 is designed based in part on a ratio between desired electrical output and the mass of system 800. Partial stator system 800 may also be designed in part based on the ratio between a rotor diameter and either of the electrical output or weight of system 800. In an exemplary embodiment, partial stator system 800 achieves more torque without increasing the amount of the stator material by increasing the diameter of the rotor.
  • [0096]
    Such applications may include bikes, scooters, washing machines, motorcycles, portable generators, power tools, and/or small engine applications. Partial stators may offer many and/or all of the benefits of gapped stators as discussed above. Moreover, partial stator system 800 may provide improved serviceability, for example because the stator components are more accessible and/or easier to assemble/disassemble compared to a fully circumferential stator.
  • [0097]
    Partial and/or gapped stators may be coupled to other components, for example control electronics. In an exemplary embodiment and with reference to FIG. 9A, a partial stator system 900 further comprises an electronics board 901 to capture the generated output from a coil 920. In another exemplary embodiment, electronics board 901 can be configured to provide power to partial stator system 900, for example delivering power to drive a rotor. Furthermore, in an exemplary embodiment, partial stator system 900 may be implemented within a commutated flux machine and/or a transverse flux machine. In one exemplary embodiment, a partial stator 910 is electrically connected to a truncated coil 920 that is mounted directly to electronics board 901. Electronics board 901 may, in an exemplary embodiment, include various electronic components 930. In an exemplary embodiment, electronic components 930 include integrated circuits, capacitors, invertors, and other suitable components, as desired.
  • [0098]
    Furthermore, in an exemplary embodiment, electronics board 901 is located a short distance from partial stator 910, and thus the length of truncated coil 920 from partial stator 910 to electronics board 901 is also short. In an exemplary embodiment, the length of truncated coil 920 from partial stator 910 to electronics board 901 is 1 inch or less. In another embodiment, the length of truncated coil 920 from partial stator 910 to electronics board 901 is in the range of 1-2 inches. Moreover, the length of truncated coil 920 may be any suitable length; however, the length of truncated coil 920 may often be desirably minimized to reduce resistive and/or other losses.
  • [0099]
    In accordance with an exemplary embodiment, a thickness to length ratio of truncated coil 920 is configured to permit a significant percentage of heat generated in truncated coil 920 to be removed conductively. In an exemplary embodiment, a significant percentage may be 70% or more of the generated heat. In various exemplary embodiments, a significant percentage may be between about 40% of the generated heat and 95% of the generated heat. With the appropriate physical dimensions and/or material properties, in an exemplary embodiment, truncated coil 920 can significantly cool itself conductively. In an exemplary embodiment, the ratio of the length of truncated coil 920 to the thickness of truncated coil 920 is about 20:1. In various exemplary embodiments, the ratio may be between about 10:1 to about 75:1. Moreover, the ratio may be any suitable ratio configured to allow truncated coil 920 to conductively transfer a suitable amount of heat, for example heat generated within the portion of truncated coil 920 at least partially enclosed by truncated stator 910.
  • [0100]
    Moreover, additional components, for example cooling components 931, may be coupled directly to coil 920. In an exemplary embodiment, cooling components 931 may utilize at least one of radiant, convective, or conductive cooling. Cooling components 931 may also be formed from and/or comprise a portion of coil 920. In this manner, thermal energy transferred from coil 920 to electronics board 901 may be reduced. Moreover, a rotor coupled to partial stator system 900 generally cools more effectively than a rotor in a fully circumferential stator system. This is due at least in part to the rotor only conducting flux in a portion of the rotation, which results in less heating of the rotor, also provides time for the rotor to cool when not conducting flux.
  • [0101]
    Furthermore, in various exemplary embodiments, truncated coil 920 is configured with minimal end turn material and/or no end turn material. An end turn may be considered to be a portion of a coil that is not linked by substantial flux. In other words, the portion of the coil that is not coupled to a flux concentrator and/or magnets may be considered to be an end turn. In general, end turns are undesirable because they incur coil losses without doing useful work. For example, an end turn of a traditional motor incurs large losses as current flows through an end turn coil portion. Coil losses may include resistive losses, eddy current losses, thermal losses, and/or other coil losses associated with a given coil mass and/or configuration. Furthermore, heating of the coil due to resistance is also reduced if using less coil material. In one embodiment, truncated coil 920 comprises a monolithic material core. Moreover, truncated coil 920 may comprise any suitable material, for example layered, laminated, and/or otherwise shaped and/or formed material, as desired.
  • [0102]
    In various exemplary embodiments, multiple commutated flux stator sections each have a corresponding truncated coil 920 in a single winding configuration, which can be connected to a single electronics board 901 (see, e.g., FIG. 9C). In other exemplary embodiments, truncated coil 920 comprises a double winding and/or more windings (see, e.g., FIG. 9B).
  • [0103]
    In addition to partial and/or gapped stators, principles of the present disclosure contemplate “floating” stators. As used herein, a “floating” stator may be a stator configured to be at least partially adjustable and/or moveable with respect to a rotor, for example in order to maintain a desired air gap. With reference now to FIGS. 10A and 10B, in an exemplary embodiment a floating stator system 1000 comprises a partial stator 1010, a rotor 1050, and one or more guide mechanisms 1011. Rotor 1050 may be attached to another object and held in place, and stator 1010 may be capable of floating. Alternatively, stator 1010 may be attached to another object and held in place, and rotor 1050 may be capable of floating.
  • [0104]
    In an exemplary embodiment, guide mechanisms 1011 are configured to help align rotor 1050 and/or mechanically facilitate a size of an air gap between rotor 1050 and partial stator 1010. Prior systems were often unable to achieve a targeted air gap as the diameter of the rotor increased. For example, many motors and/or generators are configured with an air gap no smaller than 1/250 of the diameter of the rotor, in order to prevent the rotor and stator from contacting and/or damaging one another. This is generally due to manufacturing tolerances and/or other difficulties, for example the difficulty of producing perfectly round components.
  • [0105]
    In contrast, via use of a floating stator 1010, floating stator system 1000 can be configured with an air gap independent of the diameter of a rotor. For example, in an exemplary embodiment, floating stator system 1000 is configured with a rotor diameter of 36 inches. This floating stator system 1000 may also be configured with an air gap of only 0.036 inches. In contrast, prior motors and/or generators having a similar rotor diameter were often configured with an air gap no smaller than 0.144 inches (i.e., an air gap no small than 1/250 of the diameter of the rotor). By decoupling selecting an air gap from a corresponding rotor diameter, commutated and/or transverse flux systems having large rotor diameters (and corresponding high torque) may be configured with narrow air gaps, improving the performance of the system. Stated another way, floating stator 1010 is capable of adjusting to gradual deviations in the diameter of the rotor.
  • [0106]
    Guide mechanisms 1011 may be at least one of wheels, rails, bearings, bumpers, spacers, lubricious material, and/or the like. Moreover, guide mechanisms may be any suitable device configured to direct, guide, and/or align rotor 1050 and partial stator 1010. In various exemplary embodiments, guide mechanisms 1011 also function to help clean off debris from rotor 1050. In these embodiments, guide mechanisms 1011 further comprise at least one of brushes, air or gas jets, wipers, or magnetic pick-up wipers to deflect magnetic debris. Moreover, guide mechanisms 1011 may comprise any suitable mechanism for clearing debris from rotor 1050.
  • [0107]
    Floating rotors can improve device manufacturing tolerances, ease of manufacturing, and robustness of overall design. Moreover, in an exemplary embodiment, a floating rotor further comprises a hubless design, such that the rotor is not connected to a central hub. In this manner, increased space in the middle of the rotor is provided. Moreover, such a hubless design can increase heat dissipation capabilities, for example by providing additional room for cooling airflow.
  • [0108]
    Furthermore, a hubless design may be configured to increase the floating capabilities of the rotor and/or stator, and/or to allow more tolerance within the system. Such increased floating and/or tolerance may be useful in flux machines that undergo sudden changes of direction, for example when installed in a vehicle. For example, in a vehicle, turning may increase a chance of a rotor and stator scraping, due to the angular momentum of the system. Moreover, in a vehicle, a rotor and stator may scrape and/or otherwise contact one another in an undesirable manner for various reasons, for example contact with a pothole, lateral acceleration during a turn, an external force, and/or the like. A hubless design may be configured to prevent rotor/stator contact resulting from any and/or all of the foregoing.
  • [0109]
    Suitable methods of forming and/or materials for stators, rotors, coils, switches, flux concentrators, and/or other flux conducting components of transverse and/or commutated flux machines may be found in U.S. patent application Ser. No. 12/611,733 filed Nov. 3, 2009, now U.S. Pat. No. 7,923,886 entitled “TRANSVERSE AND/OR COMMUTATED FLUX SYSTEM ROTOR CONCEPTS”. Principles of the present disclosure may suitably be combined therewith.
  • [0110]
    Principles of the present disclosure may also suitably be combined with principles for rotors in transverse flux machines and/or commutated flux machines as disclosed in U.S. patent application Ser. No. 12/611,733 filed Nov. 3, 2009, now U.S. Pat. No. 7,923,886 entitled “TRANSVERSE AND/OR COMMUTATED FLUX SYSTEM ROTOR CONCEPTS”, the contents of which are hereby incorporated by reference in their entirety.
  • [0111]
    Principles of the present disclosure may also suitably be combined with principles of polyphase transverse flux machines and/or polyphase commutated flux machines as disclosed in U.S. patent application Ser. No. 12/611,737 filed Nov. 3, 2009, now U.S. Pat. No. 7,686,508 entitled “POLYPHASE TRANSVERSE AND/OR COMMUTATED FLUX SYSTEMS”, the contents of which are hereby incorporated by reference in their entirety.
  • [0112]
    Moreover, principles of the present disclosure may suitably be combined with any number of principles disclosed in any one of and/or all of the U.S. patent applications incorporated by reference herein. Thus, for example, a particular commutated flux machine may incorporate use of a partial stator, use of a tape wound rotor, use of a polyphase design, and/or the like. All such combinations, permutations, and/or other interrelationships are considered to be within the scope of the present disclosure.
  • [0113]
    While the principles of this disclosure have been shown in various embodiments, many modifications of structure, arrangements, proportions, the elements, materials and components, used in practice, which are particularly adapted for a specific environment and operating requirements may be used without departing from the principles and scope of this disclosure. These and other changes or modifications are intended to be included within the scope of the present disclosure and may be expressed in the following claims.
  • [0114]
    In the foregoing specification, the invention has been described with reference to various embodiments. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the present disclosure. Accordingly, the specification is to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of the present disclosure. Likewise, benefits, other advantages, and solutions to problems have been described above with regard to various embodiments. However, benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or element of any or all the claims. As used herein, the terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also, as used herein, the terms “coupled,” “coupling,” or any other variation thereof, are intended to cover a physical connection, an electrical connection, a magnetic connection, an optical connection, a communicative connection, a functional connection, and/or any other connection. When language similar to “at least one of A, B, or C” is used in the claims, the phrase is intended to mean any of the following: (1) at least one of A; (2) at least one of B; (3) at least one of C; (4) at least one of A and at least one of B; (5) at least one of B and at least one of C; (6) at least one of A and at least one of C; or (7) at least one of A, at least one of B, and at least one of C.
  • STATEMENT OF INVENTION
  • [0115]
    A commutated flux stator section, comprising a flux concentrator, a first magnet connected to a first side of the flux concentrator and having an outer edge parallel to, and opposite of, the interface between the first magnet and the flux concentrator, and a second magnet connected to a second side of the flux concentrator opposite the first side. The second magnet may have an outer edge parallel to, and opposite of, the interface between the second magnet and the flux concentrator. The first magnet and the second magnet may be magnetically oriented such that a common magnetic pole is present on the first and second sides of the flux concentrator. The commutated flux stator section may partially enclose a radial section of a coil. The distance between the outer edges of the first and second magnet may be substantially equal throughout the commutated flux stator section partially enclosing the coil. The outer edge of the first magnet may be parallel to the outer edge of the second magnet. The first magnet and the second magnet may have the same thickness. The commutated flux stator section may comprise part of a commutated flux machine having an axis of rotation, and the commutated flux stator section may be tapered towards the axis of rotation. The first magnet, the second magnet, and the flux concentrator may be individually tapered towards the axis of rotation.
  • [0116]
    A commutated flux stator section comprising a plurality of commutated flux stator sections assembled at least partially about the circumference of a rotor, wherein the arc length of the plurality of commutated flux stator sections is less than the circumference of the rotor. A gap may be located between each of the plurality of commutated flux stator sections. A supporting structure may be located between one or more of the plurality of commutated flux stator sections. A tolerancing space may be located between at least two of the plurality of commutated flux stator sections. The tolerancing space may be configured to facilitate assembly of a commutated flux machine. The width of the tolerancing space may be a function of at least one of: a manufacturing tolerance, an on-center distance between poles in the commutated flux machine, a switch thickness of the rotor, or the number of poles in the commutated flux machine. The total arc length of the plurality of commutated flux stator sections may be in the range of about 1% to about 95% of the circumference of the rotor. A first subset of the plurality of commutated flux stator sections may each comprise a flux concentrator having a first polarity. A remaining subset of the plurality of commutated flux stator sections may each comprise a flux concentrator having a second polarity opposite the first polarity. The rotor may be a multipath rotor.

Claims (20)

1. An electrical machine, comprising:
a partial stator assembly comprising:
a flux concentrator;
a first magnet connected to a first side of the flux concentrator; and
a second magnet connected to a second side of the flux concentrator opposite the first side, wherein the first magnet and the second magnet are magnetically oriented such that a common magnetic pole is present on the first and second sides of the flux concentrator; and
a conductive coil at least partially enclosed by the partial stator assembly, wherein the conductive coil is configured with a single winding configuration, and wherein the electrical machine is at least one of a transverse flux machine or a commutated flux machine.
2. The electrical machine of claim 1, wherein the ratio of the length of the conductive coil to the thickness of the conductive coil is less than 20:1.
3. The electrical machine of claim 1, wherein the conductive coil is configured to remove, via conduction, at least 70% of the heat generated in the conductive coil arising from interaction of the conductive coil with the partial stator assembly.
4. The electrical machine of claim 1, further comprising an electronics board coupled to the conductive coil, wherein the length of the conductive coil from an edge of the partial stator assembly to an edge of the electronics board is less than two inches.
5. The electrical machine of claim 1, wherein the conductive coil is at least partially enclosed by multiple partial stator assemblies.
6. The electrical machine of claim 1, wherein the conductive coil comprises a laminated material.
7. The electrical machine of claim 1, further comprising a multipath rotor coupled to the partial stator assembly.
8. The electrical machine of claim 1, wherein the electrical machine comprises a plurality of partial stator assemblies and a plurality of conductive coils such that the electrical machine is a polyphase device.
9. The electrical machine of claim 1, wherein the partial stator assembly extends along less than 10% of the circumference of the electrical machine.
10. A method of manufacturing an electrical machine, the method comprising:
coupling a conductive coil to a partial stator assembly in a single winding configuration; and
coupling a rotor to the partial stator assembly, wherein the electrical machine is at least one of a transverse flux machine or a commutated flux machine.
11. The method of claim 10, further comprising coupling an electronics board to the conductive coil.
12. The method of claim 11, wherein the length of the conductive coil between the partial stator assembly and the electronics board is less than 2 inches.
13. The method of claim 10, wherein the rotor is a multipath rotor.
14. The method of claim 10, wherein coupling the conductive coil to a partial stator assembly comprises coupling the conductive coil to a plurality of partial stator assemblies in a single winding configuration.
15. The method of claim 10, wherein coupling the conductive coil to a partial stator assembly comprises:
coupling a first conductive coil to a first partial stator assembly in a single winding configuration; and
coupling a second conductive coil to a second partial stator assembly in a single winding configuration.
16. A method for generating electricity, the method comprising:
coupling an electrical machine to a load, wherein the electrical machine comprises:
a partial stator assembly;
a conductive coil configured with a single winding configuration; and
a rotor coupled to the partial stator assembly, wherein the electrical machine is
at least one of a transverse flux machine or a commutated flux machine; and
rotating the rotor to induce a voltage in the conductive coil.
17. The method of claim 16, wherein the electrical machine further comprises an electronics board coupled to the conductive coil, and wherein the length of the conductive coil between the partial stator assembly and the electronics board is less than 2 inches.
18. The method of claim 16, wherein the rotor is a multipath rotor.
19. The method of claim 16, wherein the electrical machine comprises a plurality of partial stator assemblies, each coupled to the rotor.
20. The method of claim 16, wherein the rotating the rotor is responsive to a force applied to the rotor by at least one of: an engine in a portable generator, a propeller, or a rider of a bicycle.
US13187744 2008-11-03 2011-07-21 Transverse and/or commutated flux system stator concepts Abandoned US20110273035A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US11087408 true 2008-11-03 2008-11-03
US11088908 true 2008-11-03 2008-11-03
US11088408 true 2008-11-03 2008-11-03
US11087908 true 2008-11-03 2008-11-03
US11488108 true 2008-11-14 2008-11-14
US16844709 true 2009-04-10 2009-04-10
US12611728 US7851965B2 (en) 2008-11-03 2009-11-03 Transverse and/or commutated flux system stator concepts
US12942495 US8008821B2 (en) 2008-11-03 2010-11-09 Transverse and/or commutated flux system stator concepts
US13187744 US20110273035A1 (en) 2008-11-03 2011-07-21 Transverse and/or commutated flux system stator concepts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13187744 US20110273035A1 (en) 2008-11-03 2011-07-21 Transverse and/or commutated flux system stator concepts

Publications (1)

Publication Number Publication Date
US20110273035A1 true true US20110273035A1 (en) 2011-11-10

Family

ID=42130517

Family Applications (9)

Application Number Title Priority Date Filing Date
US12611733 Expired - Fee Related US7923886B2 (en) 2008-11-03 2009-11-03 Transverse and/or commutated flux system rotor concepts
US12611737 Active US7868508B2 (en) 2008-11-03 2009-11-03 Polyphase transverse and/or commutated flux systems
US12611728 Active US7851965B2 (en) 2008-11-03 2009-11-03 Transverse and/or commutated flux system stator concepts
US12942495 Expired - Fee Related US8008821B2 (en) 2008-11-03 2010-11-09 Transverse and/or commutated flux system stator concepts
US12948925 Active US7994678B2 (en) 2008-11-03 2010-11-18 Polyphase transverse and/or commutated flux systems
US13039837 Active US8030819B2 (en) 2008-11-03 2011-03-03 Transverse and/or commutated flux system rotor concepts
US13173513 Active US8193679B2 (en) 2008-11-03 2011-06-30 Polyphase transverse and/or commutated flux systems
US13187744 Abandoned US20110273035A1 (en) 2008-11-03 2011-07-21 Transverse and/or commutated flux system stator concepts
US13230522 Active US8242658B2 (en) 2008-11-03 2011-09-12 Transverse and/or commutated flux system rotor concepts

Family Applications Before (7)

Application Number Title Priority Date Filing Date
US12611733 Expired - Fee Related US7923886B2 (en) 2008-11-03 2009-11-03 Transverse and/or commutated flux system rotor concepts
US12611737 Active US7868508B2 (en) 2008-11-03 2009-11-03 Polyphase transverse and/or commutated flux systems
US12611728 Active US7851965B2 (en) 2008-11-03 2009-11-03 Transverse and/or commutated flux system stator concepts
US12942495 Expired - Fee Related US8008821B2 (en) 2008-11-03 2010-11-09 Transverse and/or commutated flux system stator concepts
US12948925 Active US7994678B2 (en) 2008-11-03 2010-11-18 Polyphase transverse and/or commutated flux systems
US13039837 Active US8030819B2 (en) 2008-11-03 2011-03-03 Transverse and/or commutated flux system rotor concepts
US13173513 Active US8193679B2 (en) 2008-11-03 2011-06-30 Polyphase transverse and/or commutated flux systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13230522 Active US8242658B2 (en) 2008-11-03 2011-09-12 Transverse and/or commutated flux system rotor concepts

Country Status (6)

Country Link
US (9) US7923886B2 (en)
JP (3) JP2012508555A (en)
KR (3) KR20110093803A (en)
CN (3) CN102257709A (en)
EP (3) EP2342802A2 (en)
WO (3) WO2010062764A3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222194A1 (en) * 2012-12-04 2014-06-05 Schaeffler Technologies Gmbh & Co. Kg Method for producing transverse flux machine, involves inserting primary sub-segments in conductor ring, and bonding mechanically primary sub-segments with one another to circular primary ring
US9331531B2 (en) 2012-10-17 2016-05-03 Eocycle Technologies Inc. Method of manufacturing a transverse flux electrical machine rotor
US9419486B2 (en) 2012-09-24 2016-08-16 Eocycle Technologies Inc. Housing less transverse flux electrical machine
US9722479B2 (en) 2012-08-03 2017-08-01 Eocycle Technologies Inc. Wind turbine comprising a transverse flux electrical machine

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012508555A (en) 2008-11-03 2012-04-05 モーター エクセレンス, エルエルシー Rotor concept of lateral and / or Konmyuteto formula flux system
WO2010083054A1 (en) 2009-01-16 2010-07-22 Jore Matthew B Segmented stator for an axial field device
EP2394351A2 (en) 2009-02-05 2011-12-14 Eliyahu Rozinsky Electrical machine
WO2010119357A3 (en) * 2009-04-15 2012-03-29 Koninklijke Philips Electronics N.V. Drive with curved linear induction motor
WO2011031691A1 (en) * 2009-09-08 2011-03-17 Green Ray Technologies Llc Arbitrary phase relationship for electrical connections in n-phase electric machines
US9102076B2 (en) * 2009-11-25 2015-08-11 Cabot Corporation Methods for making aerogel composites
WO2011115633A1 (en) 2010-03-15 2011-09-22 Motor Excellence Llc Transverse and/or commutated flux system for electric bicycles
WO2011115632A1 (en) 2010-03-15 2011-09-22 Motor Excellence Llc Transverse and/or commutated flux systems configured to provide reduced flux leakage, hysteresis loss reduction, and phase matching
CN102959832B (en) * 2010-03-15 2016-11-16 电扭矩机器股份有限公司 Phase having a lateral offset and / or commutated flux system
US9154024B2 (en) 2010-06-02 2015-10-06 Boulder Wind Power, Inc. Systems and methods for improved direct drive generators
WO2012067895A4 (en) * 2010-11-17 2012-09-20 Motor Excellence, Llc Transverse and/or commutated flux system coil concepts
WO2012067896A3 (en) * 2010-11-17 2012-07-12 Motor Excellence, Llc Transverse and/or commutated flux systems having laminated and powdered metal portions
US8405275B2 (en) 2010-11-17 2013-03-26 Electric Torque Machines, Inc. Transverse and/or commutated flux systems having segmented stator laminations
US8749108B2 (en) * 2011-03-15 2014-06-10 Electric Torque Machines, Inc. Transverse and/or commutated flux systems having laminated and powdered metal portions
JP5800352B2 (en) * 2011-03-23 2015-10-28 Necネットワーク・センサ株式会社 Communication device and electronic equipment
US8400038B2 (en) 2011-04-13 2013-03-19 Boulder Wind Power, Inc. Flux focusing arrangement for permanent magnets, methods of fabricating such arrangements, and machines including such arrangements
US9006951B2 (en) 2011-06-28 2015-04-14 Electric Torque Machines Inc Cogging torque reduction device for electrical machines
EP2546127A8 (en) * 2011-07-13 2013-03-27 Xu, Hong-Jun Force measuring device for a bicycle
KR101259171B1 (en) * 2011-09-26 2013-04-30 이형진 High efficiency electric motor, high efficiency electric generator
WO2013070743A1 (en) * 2011-11-08 2013-05-16 Electric Torque Machines, Inc. Transverse and/or commutated flux systems having multidirectional laminations
US9300194B2 (en) * 2011-11-09 2016-03-29 Hamilton Sundstrand Corporation Electromagnetic device
EP2604876A1 (en) * 2011-12-12 2013-06-19 Siemens Aktiengesellschaft Magnetic radial bearing with individual core plates in tangential direction
CN102522834B (en) * 2012-01-01 2013-12-04 中国船舶重工集团公司第七一二研究所 Novel transverse flux motor
US9729016B1 (en) 2012-03-20 2017-08-08 Linear Labs, Inc. Multi-tunnel electric motor/generator
JP6223418B2 (en) 2012-03-20 2017-11-01 リニア ラボズ インコーポレイテッド Improved dc electric motor / generator magnetic flux density of the permanent magnet is strengthened
DE102012205826A1 (en) * 2012-04-11 2013-10-17 Bayerische Motoren Werke Aktiengesellschaft High-voltage starter pinion
US9461508B2 (en) 2012-05-30 2016-10-04 Prototus, Ltd. Electromagnetic generator transformer
US20140009025A1 (en) * 2012-07-06 2014-01-09 Persimmon Technologies Corporation Hybrid field electric motor
US8339019B1 (en) 2012-07-30 2012-12-25 Boulder Wind Power, Inc. Structure for an electromagnetic machine having compression and tension members
WO2014107474A1 (en) * 2013-01-04 2014-07-10 David Calley Metal ribbon stator and motor comprising same
US8736133B1 (en) 2013-03-14 2014-05-27 Boulder Wind Power, Inc. Methods and apparatus for overlapping windings
CN104135130B (en) * 2013-04-30 2016-11-23 丁景信 Electric motor
JP5886799B2 (en) * 2013-08-05 2016-03-16 富士重工業株式会社 The outside of the vehicle environment recognition device
US9236773B2 (en) * 2013-08-16 2016-01-12 Electric Torque Machines Inc Segmented stator with controlled eddy current
US20150147188A1 (en) * 2013-11-25 2015-05-28 Macroair Technologies, Inc. High Volume Low Speed Fan Using Direct Drive Transverse Flux Motor
US9509181B2 (en) 2013-12-10 2016-11-29 Electric Torque Machines Inc. Transverse flux stator geometry
DE102015212791A1 (en) * 2015-07-08 2017-01-12 Fgb A. Steinbach Gmbh & Co. Kg Secondary part and primary part for a transverse flux
US9742226B2 (en) 2015-08-11 2017-08-22 Genesis Robotics Llp Electric machine
CN105207377A (en) * 2015-10-13 2015-12-30 石瑛汉宫 Novel efficient energy-saving direct current motor

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020070627A1 (en) * 2000-09-06 2002-06-13 Ward Robert W. Stator core design
US20020113520A1 (en) * 2000-05-05 2002-08-22 Guenter Kastinger Unipolar transverse flux machine
US20040207281A1 (en) * 2001-07-09 2004-10-21 Andrej Detela Hybrid synchronous electric machine
US20050062352A1 (en) * 2001-08-16 2005-03-24 Guenter Kastinger Unipolar transverse magnetic flux machine
US6882066B2 (en) * 2000-07-26 2005-04-19 Robert Bosch Gmbh Unipolar transverse flux machine
US20070152528A1 (en) * 2005-12-29 2007-07-05 Korea Electro Technology Research Institute Permanent magnet excited transverse flux motor with outer rotor
US7358639B2 (en) * 2002-01-30 2008-04-15 Caamano Ramon A High frequency electric motor or generator
US20080211326A1 (en) * 2006-12-28 2008-09-04 Korea Electro Technology Research Institute Inner rotor type permanent magnet excited transverse flux motor
US20080315700A1 (en) * 2007-06-19 2008-12-25 Hitachi, Ltd. Rotating Electrical Machine

Family Cites Families (319)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1361136A (en) * 1917-02-06 1920-12-07 Burke Electric Company Dynamo-electric machine
US2078668A (en) * 1935-11-29 1937-04-27 Westinghouse Electric & Mfg Co Low-loss dynamo-electric machine
US2122307A (en) 1937-09-08 1938-06-28 Gen Electric Timer motor
US3403273A (en) * 1965-02-26 1968-09-24 Tanaka Instr Company Ltd Self-starting synchronous motor
US3437854A (en) * 1965-11-08 1969-04-08 Fujitsu Ltd Electric rotary step motor with plural offset stator windings
DE1513856A1 (en) 1966-02-04 1969-04-03 Giffey Pretre S A Ets Alternator
US3558941A (en) * 1968-07-04 1971-01-26 Giorgio Visconti Brebbia Permanent magnet stepping motor with single winding
DE2053262B2 (en) * 1970-10-30 1972-09-21
US3700942A (en) * 1971-02-03 1972-10-24 Max Alth Self-starting synchronous motors
US3869625A (en) * 1971-09-08 1975-03-04 Bruce A Sawyer Plural axis linear position
US3774059A (en) * 1971-09-13 1973-11-20 Cambridge Thermionic Corp Rotary stepping motor with laminated stator and rotor pole construction
DE2429492C3 (en) * 1974-06-20 1979-04-26 Elmeg-Elektro-Mechanik Gmbh, 3150 Peine
US4021691A (en) 1975-02-18 1977-05-03 Alexandr Antonovich Dukshtau Electrical machine stator
US3984711A (en) * 1975-04-07 1976-10-05 Warner Electric Brake & Clutch Company Variable reluctance step motor with permanent magnets
DE2727450A1 (en) 1976-07-05 1978-01-12 Philips Nv synchronous motor
US4255696A (en) * 1976-11-17 1981-03-10 Sigma Instruments, Inc. Synchronous motor system
US4114057A (en) 1976-12-06 1978-09-12 Esters Ernie B Dynamoelectric machine with inner and outer stators
US4127802A (en) * 1977-04-06 1978-11-28 Johnson Milton H High torque stepping motor
US4237396A (en) * 1977-10-06 1980-12-02 P A Management Consultants Limited Electromagnetic machines with permanent magnet excitation
JPS5484207A (en) * 1977-12-19 1979-07-05 Nippon Telegr & Teleph Corp <Ntt> Pulse motor
JPS5442403Y2 (en) * 1978-04-13 1979-12-10
US4363988A (en) 1978-06-12 1982-12-14 General Electric Company Induction disk motor with metal tape components
US4286180A (en) * 1978-07-20 1981-08-25 Kollmorgen Technologies Corporation Variable reluctance stepper motor
US4392072A (en) * 1978-09-13 1983-07-05 General Electric Company Dynamoelectric machine stator having articulated amorphous metal components
DE2845264C2 (en) 1978-10-18 1988-12-29 Robert Bosch Gmbh, 7000 Stuttgart, De
DE2918329A1 (en) 1979-05-07 1980-12-04 Papst Motoren Kg A method for attaching a galvanomagnetic sensor a recess in a printed circuit board
NL7904818A (en) 1979-06-20 1980-12-23 Philips Nv Stepper motor.
US4255684A (en) * 1979-08-03 1981-03-10 Mischler William R Laminated motor stator structure with molded composite pole pieces
US4388545A (en) 1981-06-10 1983-06-14 General Electric Company Rotor for a permanent magnet AC motor
DE3270973D1 (en) 1981-07-08 1986-06-12 Jeumont Schneider Variable reluctance electric motor for the translatery movement of the control rods in a nuclear reactor
US4501980A (en) * 1982-06-04 1985-02-26 Motornetics Corporation High torque robot motor
US4611139A (en) 1982-09-29 1986-09-09 Motorola, Inc. Axial air gap brushless alternator
US4459501A (en) * 1983-06-13 1984-07-10 Intra-Technology Assoc. Inc. Toroidal generator and motor with radially extended magnetic poles
DE3409047C2 (en) * 1984-03-13 1989-02-16 Kernforschungsanlage Juelich Gmbh, 5170 Juelich, De
GB8414953D0 (en) 1984-06-12 1984-07-18 Maghemite Inc Brushless permanent magnet dc motor
JPS61221561A (en) * 1985-03-27 1986-10-01 Nippon Denso Co Ltd Flat rotary electric machine
US4639626A (en) * 1985-04-26 1987-01-27 Magnetics Research International Corporation Permanent magnet variable reluctance generator
EP0201021B1 (en) * 1985-05-10 1990-03-28 Portescap Electric synchronous motor with a disc-shaped rotor
DE3602687A1 (en) 1986-01-30 1987-08-06 Weh Herbert Permanent magnet synchronous machine with transverse flux paths
GB8603590D0 (en) * 1986-02-13 1986-03-19 Lucas Ind Plc Dynamo electric machines
US4794286A (en) 1986-04-03 1988-12-27 Adept Technology, Inc. Variable reluctance stepper motor
US4850100A (en) 1987-12-23 1989-07-25 General Electric Company Method of making a rotor assembly
US4801834A (en) 1986-04-30 1989-01-31 General Electric Company Rotor assembly
US4835840A (en) 1986-06-16 1989-06-06 General Electric Company Method of making an improved disc rotor assembly
US4704555A (en) 1986-06-16 1987-11-03 General Electric Company Improved disc rotor assembly
DE3626149A1 (en) 1986-08-01 1988-02-11 Heinz Dipl Phys Ritter Cycle dynamo
DE8711725U1 (en) 1986-08-29 1987-10-15 Papst-Motoren Gmbh & Co Kg, 7742 St Georgen, De
WO1988002194A1 (en) * 1986-09-20 1988-03-24 Nippon Telegraph And Telephone Corporation Pulse motor
DE3705089C2 (en) 1987-02-13 1989-02-02 Herbert Prof. Dr.-Ing. 3300 Braunschweig De Weh
US4857786A (en) * 1987-04-06 1989-08-15 Hitachi, Ltd. Structure of stepping motor and method of driving the stepping motor
US5130595A (en) * 1987-11-23 1992-07-14 Chrysler Corporation Multiple magnetic paths machine
KR910007482B1 (en) * 1988-03-18 1991-09-26 미다 가쓰시게 Linier access apparatus and magnetic disk device
US4883999A (en) 1988-08-15 1989-11-28 Pacific Scientific Company Polyphase electronically commutated reluctance motor
US5015903A (en) 1988-08-15 1991-05-14 Pacific Scientific Company Electronically commutated reluctance motor
US4900965A (en) * 1988-09-28 1990-02-13 Fisher Technology, Inc. Lightweight high power electromotive device
DE3904516C1 (en) 1989-02-15 1990-06-13 Robert Bosch Gmbh, 7000 Stuttgart, De
KR910006289B1 (en) 1989-04-08 1991-08-19 남중형 Solenoid type electric generator
DE3917343C2 (en) 1989-05-27 2002-08-29 Bosch Gmbh Robert Clear slip ring claw-pole generator
DE3927453C2 (en) 1989-08-19 1991-05-23 Herbert Prof. Dr.-Ing. 3300 Braunschweig De Weh
US4959577A (en) 1989-10-23 1990-09-25 General Motors Corporation Alternating current generator
US5117142A (en) 1989-11-20 1992-05-26 501 Ibk Ab Permanent magnetized synchronous machine designed according to the transverse flux principle
JP3023510B2 (en) * 1989-12-12 2000-03-21 株式会社いすゞセラミックス研究所 Flywheel power generator with engine
JP2946604B2 (en) * 1990-02-26 1999-09-06 株式会社デンソー AC generator
FR2664105B1 (en) 1990-07-02 1995-06-09 Koehler Gerard step-by-step rotary motor has a variable reluctance transverse flux.
DE4021588A1 (en) * 1990-07-06 1992-01-09 Zacharias Johann Dr Ing Neag Homopolar generator as a DC-high voltage generators, and gleichstromumspanner hochspannungsgleichstromgenerator- or motor
US5038066A (en) * 1990-09-12 1991-08-06 General Motors Corporation Claw pole rotary actuator with limited angular movement
JPH05504045A (en) 1990-11-23 1993-06-24
DE4106063A1 (en) * 1991-02-27 1992-09-03 Forschungszentrum Juelich Gmbh Magnetic bearing cell
US5177054A (en) * 1991-04-08 1993-01-05 Emerson Electric Co. Flux trapped superconductor motor and method therefor
US5208503A (en) * 1991-04-12 1993-05-04 Hisey Bradner L Energy-efficient ferromagnetic stator and core apparatus
US5485072A (en) 1991-04-29 1996-01-16 J. M. Voith Gesellschaft M. B. H. Process for operating permanently excited single-phase alternating current machines
JP2530778Y2 (en) 1991-05-16 1997-03-26 日本ビクター株式会社 Ribbon coil armature
JP3237217B2 (en) * 1991-08-08 2001-12-10 株式会社デンソー The rotor of the automotive alternator
DE4132340C2 (en) 1991-08-26 1993-07-08 Loher Ag, 8399 Ruhstorf, De
DE69221267T2 (en) 1991-11-22 1998-02-26 Andrej Detela Hybridische synchronous machine with transverse flux magnetic
US5212419A (en) * 1992-01-10 1993-05-18 Fisher Electric Motor Technology, Inc. Lightweight high power electromotive device
US5530308A (en) * 1992-02-18 1996-06-25 General Electric Company Electromagnetic pump stator coil
US5195231A (en) 1992-02-18 1993-03-23 General Electric Company Method for producing inner stators for electromagnetic pumps
US5250865A (en) * 1992-04-30 1993-10-05 Avcon - Advanced Controls Technology, Inc. Electromagnetic thrust bearing for coupling a rotatable member to a stationary member
US5382859A (en) * 1992-09-01 1995-01-17 Unique Mobility Stator and method of constructing same for high power density electric motors and generators
DE4301076A1 (en) * 1993-01-16 1994-07-21 Forschungszentrum Juelich Gmbh Magnet bearing cell having rotor and stator
DE69405182D1 (en) * 1993-09-30 1997-10-02 Gate Spa Permanent magnet electric motor with low pulsating torque
DE4335848C2 (en) 1993-10-20 1996-07-11 Voith Gmbh J M Cooling arrangement for a transverse flux
US5780953A (en) 1993-12-07 1998-07-14 Nippondenso Co., Ltd. Alternator
DE4341963C2 (en) * 1993-12-09 1999-09-23 Stihl Maschf Andreas Magnet ignition
GB2289994B (en) 1994-03-03 1996-05-08 Harold Aspden Magnetic reluctance motors
DE19507233C2 (en) 1994-04-15 1998-03-12 Weh Herbert Prof Dr Ing Dr H C Transverse flux machine with permanent magnet excitation and multi-strand armature winding
US5696419A (en) * 1994-06-13 1997-12-09 Alternative Generation Devices, Inc. High-efficiency electric power generator
JPH0870568A (en) * 1994-06-20 1996-03-12 Mitsubishi Heavy Ind Ltd Two-degree-of-freedom operation motor, and its controller
FR2725566B1 (en) 1994-10-10 1997-02-14
EP0712199B1 (en) * 1994-11-10 1998-05-20 Voith Turbo GmbH Motor with tranverse flux
US5942828A (en) * 1995-12-16 1999-08-24 Hill; Wolfgang Transverse flux machine
US5578885A (en) 1994-12-22 1996-11-26 General Motors Corporation Rotor assembly for hybrid alternator
DE19522382C1 (en) * 1995-06-23 1996-12-19 Voith Gmbh J M Transverse flux for use in a direct drive for vehicles, particularly rail drive
US6043579A (en) * 1996-07-03 2000-03-28 Hill; Wolfgang Permanently excited transverse flux machine
GB9516475D0 (en) 1995-08-11 1995-10-11 Rolls Royce Power Eng Electrical machine
GB9516497D0 (en) * 1995-08-11 1995-10-11 Rolls Royce Power Eng Electrical machine
JP3351258B2 (en) * 1995-09-27 2002-11-25 株式会社デンソー Vehicle AC generator
JPH09142371A (en) * 1995-11-27 1997-06-03 Sanyo Electric Co Ltd Linear motor-driven bicycle
EP0777317A1 (en) 1995-11-28 1997-06-04 Voith Turbo GmbH &amp; Co. KG Circuit device for supplying power to a two-phase electrical machine
US5650680A (en) * 1995-12-11 1997-07-22 Marathon Electric Mfg. Co. Dynamo electric machine with permanent magnet rotor structure
JP3084220B2 (en) * 1995-12-21 2000-09-04 多摩川精機株式会社 Hybrid step motor
DE19610754C1 (en) 1996-03-19 1997-03-27 Voith Turbo Kg Rotor for electrical machine, in particular transverse flux machine
DE19610753A1 (en) 1996-03-19 1997-09-25 Voith Turbo Kg Method for operating a drive unit for a vehicle, especially for city buses and drive unit
DE19612034A1 (en) 1996-03-27 1997-10-02 Voith Turbo Kg Method for operating a drive unit for vehicles and power unit
JP3071392B2 (en) * 1996-04-22 2000-07-31 多摩川精機株式会社 Hybrid step motor
DE19619321C2 (en) 1996-05-14 1998-07-09 Voith Turbo Kg A method of operating a vehicle with a plurality of electric drive units
WO1997045943A1 (en) * 1996-05-30 1997-12-04 Toeroek Vilmos A self-starting brushless electric motor
JP3282521B2 (en) 1996-07-08 2002-05-13 トヨタ自動車株式会社 Reluctance motor
US5973436A (en) 1996-08-08 1999-10-26 Rolls-Royce Power Engineering Plc Electrical machine
JPH1069753A (en) * 1996-08-20 1998-03-10 Samsung Electro Mech Co Ltd Method and device for purifying air in hard disk drive
DE19634949C1 (en) 1996-08-29 1998-03-05 Weh Herbert Prof Dr Ing H C Transversal-flux electrical machine with several transverse magnetic circuits
US5925965A (en) 1996-09-06 1999-07-20 Emerson Electric Co. Axial flux reluctance machine with two stators driving a rotor
EP0833429A1 (en) 1996-09-27 1998-04-01 Voith Turbo GmbH &amp; Co. KG Transversal flux machine with a plurality ofparallely connected wine stands and circuit device for supplying such machine
DE19639670C2 (en) 1996-09-27 1999-09-02 Voith Turbo Kg A transverse flux machine with a plurality of parallel-connected windings ring
US5894183A (en) * 1996-10-29 1999-04-13 Caterpillar Inc. Permanent magnet generator rotor
JP3317479B2 (en) * 1996-11-13 2002-08-26 ミネベア株式会社 Stepping motor
DE29621166U1 (en) 1996-12-06 1998-04-09 Voith Turbo Kg Alternator, in particular transverse flux
DE19650572A1 (en) 1996-12-06 1998-06-10 Voith Turbo Kg Procedure for cooling AC machine esp transversal flux machine
DE19650570A1 (en) 1996-12-06 1998-06-10 Voith Turbo Kg A method for controlling the drag torque in a diesel-electric drive system and drive system
DE29621170U1 (en) 1996-12-06 1998-04-09 Voith Turbo Kg Alternator
US5982074A (en) * 1996-12-11 1999-11-09 Advanced Technologies Int., Ltd. Axial field motor/generator
US6411002B1 (en) 1996-12-11 2002-06-25 Smith Technology Development Axial field electric machine
US5731649A (en) * 1996-12-27 1998-03-24 Caama+E,Otl N+Ee O; Ramon A. Electric motor or generator
US6037692A (en) 1997-12-16 2000-03-14 Miekka; Fred N. High power low RPM D.C. motor
DE19704392A1 (en) 1997-02-06 1998-08-13 Voith Turbo Kg Use of a transverse flux for use in a single wheel for vehicles and individual wheel for vehicles
DE59800010D1 (en) 1997-03-19 1999-08-05 Abb Daimler Benz Transp Electromotive wheel hub drive for a vehicle
DE19714895C2 (en) * 1997-04-03 2002-06-27 Daimlerchrysler Rail Systems Unilateral transverse flux in multi-strand design
JP3131403B2 (en) * 1997-04-07 2001-01-31 日本サーボ株式会社 Stepping motor
DE19715019A1 (en) * 1997-04-11 1998-10-22 Voith Turbo Kg A rotor for an electrical machine, in particular a transverse flux machine
US5814907A (en) 1997-05-05 1998-09-29 Moog Inc. Electromagnetic force motor with internal eddy current damping
US6232693B1 (en) 1997-05-13 2001-05-15 Emerson Electric Co. Switched reluctance motor having stator inserts for noise reduction, magnet positioning, and coil retention
DE19728172C2 (en) 1997-07-02 2001-03-29 Wolfgang Hill Electrical machine with soft-magnetic teeth, and processes for their preparation
DE19729382A1 (en) 1997-07-10 1999-01-14 Voith Turbo Kg This electric drive arrangement with a Anfahrdrehmomentenwandler
JP3425369B2 (en) * 1997-09-24 2003-07-14 東芝テック株式会社 3-phase motor
DE19743906C2 (en) 1997-10-04 2002-06-13 Voith Turbo Kg A wheel drive
US6133669A (en) * 1997-12-31 2000-10-17 Tupper; Christopher N. Low-loss magnet core for high frequency claw-pole-type alternator
DE19806667A1 (en) 1998-02-18 1999-08-19 Bosch Gmbh Robert Synchronous machine, especially generator for car
JP3586706B2 (en) 1998-03-11 2004-11-10 独立行政法人農業生物資源研究所 Method of regulating cell death
DE19813155C1 (en) 1998-03-19 1999-10-28 Abb Daimler Benz Transp multi-strand transverse flux
CN1112753C (en) 1998-03-30 2003-06-25 赫加奈斯公司 Electrical machine element
US6177748B1 (en) 1998-04-13 2001-01-23 Reliance Electronics Technologies, Llc Interleaved laminated core for electromagnetic machine
JP2002512499A (en) * 1998-04-21 2002-04-23 ホガナス アクチボラゲット Stator of the induction machine
DE19818035A1 (en) * 1998-04-22 1999-10-28 Bayerische Motoren Werke Ag transverse flux
US6960860B1 (en) 1998-06-18 2005-11-01 Metglas, Inc. Amorphous metal stator for a radial-flux electric motor
DE19931394B4 (en) * 1998-07-13 2010-02-04 Lg Electronics Inc. Stator for a linear motor
WO2000005804A1 (en) 1998-07-23 2000-02-03 Voith Turbo Gmbh & Co. Kg Stator module for an electric motor
US6246561B1 (en) * 1998-07-31 2001-06-12 Magnetic Revolutions Limited, L.L.C Methods for controlling the path of magnetic flux from a permanent magnet and devices incorporating the same
DE19846924A1 (en) * 1998-10-12 2000-04-13 Sachsenwerk Gmbh Permanent magnet assembly of an electric machine and process for their preparation
DE59900532D1 (en) 1998-10-30 2002-01-24 Bombardier Transp Gmbh transverse flux
US6097118A (en) * 1998-10-30 2000-08-01 University Of Chicago Reluctance apparatus for flywheel energy storage
US6835941B1 (en) * 1998-11-30 2004-12-28 Nikon Corporation Stage unit and its making method, and exposure apparatus and its making method
DE19856526A1 (en) 1998-12-08 2000-06-15 Schaefertoens Joern Heinrich Electric generator, preferably for use in motor vehicle, has central core with star-shaped flat strips about bore, either as strips of different widths or of same width, with wedge-shaped cross-section
DE19858304C2 (en) 1998-12-17 2001-11-08 Voith Turbo Kg AC machine with transverse flux, in particular two-pole transverse flux for high speed
US6215616B1 (en) 1999-01-04 2001-04-10 Western Digital Corporation Disk drive spindle motor with wire guide insert
US6296072B1 (en) 1999-01-20 2001-10-02 Opti-Bike Llc Electric bicycle and methods
US6066906A (en) * 1999-02-17 2000-05-23 American Superconductor Corporation Rotating machine having superconducting windings
US6445105B1 (en) 1999-04-06 2002-09-03 General Electric Company Axial flux machine and method of fabrication
US6137202A (en) * 1999-04-27 2000-10-24 General Electric Company Insulated coil and coiled frame and method for making same
CN1078765C (en) 1999-05-04 2002-01-30 李宜和 Auxiliary power motor with improved structure
DE60032703T2 (en) 1999-05-11 2007-10-11 Höganäs Ab Stator with teeth made of soft magnetic powder material.
EP1063754B1 (en) 1999-06-22 2007-12-12 Bombardier Transportation GmbH Transversal flux machine
JP2001025197A (en) 1999-07-06 2001-01-26 Nissan Motor Co Ltd Stator of motor
FR2802358B1 (en) 1999-12-08 2002-01-18 Centre Nat Rech Scient Motor / generator has reluctance excited and winding in the air gap
DE19960737A1 (en) 1999-12-16 2001-07-05 Voith Turbo Kg A wheel drive
CA2394632C (en) 1999-12-23 2008-04-15 Hoganas Ab Electrical machine stator and rotor
JP3541934B2 (en) 2000-01-11 2004-07-14 三菱電機株式会社 The rotor of the AC generator
JP4675019B2 (en) 2000-01-14 2011-04-20 株式会社ハーモニック・ドライブ・システムズ Hybrid synchronous motor with a loop winding
EP1254502A2 (en) 2000-01-28 2002-11-06 IMP Limited Reluctance stepping motor
US6492758B1 (en) 2000-02-25 2002-12-10 Fisher & Paykel Limited Polyphase transverse flux motor
US20010030486A1 (en) * 2000-03-06 2001-10-18 Pijanowski Joseph M. Electric machine with structural spacer
DE10014226A1 (en) 2000-03-22 2001-09-27 Bosch Gmbh Robert Electromechanical wheel brake has transversal flux motor with annular stimulation winding enclosing axis, yokes distributed peripherally on stimulation winding, matching movable poles
GB0007743D0 (en) 2000-03-31 2000-05-17 Kelsey Hayes Co Actuator
WO2001078219A1 (en) 2000-04-07 2001-10-18 Abb Ab An electrical machine
JP4007476B2 (en) 2000-04-14 2007-11-14 三菱電機株式会社 Vehicle AC generator
DE10022319A1 (en) 2000-05-09 2001-11-29 Voith Turbo Kg Drive unit, in particular electric drive unit for driving a wheel axle in Trans Axel construction
JP2001327138A (en) 2000-05-12 2001-11-22 Kosumosu:Kk Motor utilizing converging phenomenon of magnetic flux
JP4641595B2 (en) 2000-07-14 2011-03-02 日本電産コパル株式会社 Claw-pole permanent magnet type stepping motor
US6611078B1 (en) 2000-07-19 2003-08-26 Tri-Seven Research, Inc. Flux diode motor
DE10043120A1 (en) 2000-08-31 2002-04-11 Wolfgang Hill Electric machine for high Ummagnetisierungsfrequenzen
CA2319848A1 (en) 2000-09-21 2002-03-21 Jean-Yves Dube Proportional action propulsion system
DE10047675A1 (en) 2000-09-25 2002-04-11 Voith Turbo Kg Stator module for a synchronous machine with transverse flux and synchronous machine
WO2002027897A1 (en) 2000-09-26 2002-04-04 Mitsubishi Denki Kabushiki Kaisha Ac generator for vehicle
US20080042507A1 (en) 2000-11-15 2008-02-21 Edelson Jonathan S Turbine starter-generator
DE10053265C2 (en) 2000-10-26 2003-02-06 Voith Turbo Kg Parking brake device on vehicles and drive system with a parking brake device
DE10053589A1 (en) 2000-10-27 2002-05-29 Voith Turbo Kg A rotor for an electrical machine, in particular a synchronous machine and a synchronous machine with transverse flux
DE10062073A1 (en) 2000-12-13 2002-06-20 Bosch Gmbh Robert Unipolar transverse flux
US20020074876A1 (en) * 2000-12-14 2002-06-20 Peter Campbell Flywheel magneto generator
US6952068B2 (en) 2000-12-18 2005-10-04 Otis Elevator Company Fabricated components of transverse flux electric motors
DE10106519A1 (en) 2001-02-13 2002-08-22 Bosch Gmbh Robert electric machine
JP3740375B2 (en) 2001-02-27 2006-02-01 株式会社日立製作所 Vehicle AC generator
DE10128646A1 (en) 2001-06-15 2003-01-02 Voith Turbo Kg stator
JP4113339B2 (en) 2001-06-18 2008-07-09 日本サーボ株式会社 3-phase annular coil type permanent magnet rotating electric machine
DE10130702A1 (en) 2001-06-26 2003-01-02 Bosch Gmbh Robert Permanently excited transverse flux
DE10131428A1 (en) 2001-06-29 2003-01-16 Bosch Gmbh Robert Switched reluctance motor with radial and transverse flow
JP2003013955A (en) 2001-07-02 2003-01-15 Ishikawajima Harima Heavy Ind Co Ltd Stator core of magnetic bearing
EP1414636B1 (en) 2001-08-01 2009-12-16 Sumitomo (SHI) Demag Plastics Machinery GmbH Electromechanical linear drive
DE10145447A1 (en) 2001-09-14 2003-04-03 Voith Turbo Kg Method for cooling a synchronous machine with transverse flux and synchronous machine with transverse flux
JP3561249B2 (en) 2001-09-17 2004-09-02 三菱電機株式会社 The stator of the alternator and a method of manufacturing
DE10145820A1 (en) 2001-09-17 2003-04-30 Voith Turbo Kg A rotor for a synchronous machine with transverse flux guidance, and methods for improving the corrosion protection
DE10146123A1 (en) 2001-09-19 2003-04-24 Minebea Co Ltd Electronically commutated electric motor with axially parallel coils
US6664704B2 (en) 2001-11-23 2003-12-16 David Gregory Calley Electrical machine
US6724114B2 (en) 2001-12-28 2004-04-20 Emerson Electric Co. Doubly salient machine with angled permanent magnets in stator teeth
DE10164290A1 (en) 2001-12-28 2003-07-17 Magnet Motor Gmbh Permanent magnet excited electric machine
US6777842B2 (en) 2001-12-28 2004-08-17 Emerson Electric Co. Doubly salient machine with permanent magnets in stator teeth
US7129612B2 (en) * 2002-01-24 2006-10-31 Visteon Global Technologies, Inc. Stator assembly with cascaded winding and method of making same
US6603237B1 (en) 2002-01-30 2003-08-05 Ramon A. Caamano High frequency electric motor or generator including magnetic cores formed from thin film soft magnetic material
US6879080B2 (en) 2002-01-30 2005-04-12 Ramon A. Caamano High frequency electric motor or generator including magnetic cores formed from thin film soft magnetic material
EP1470073B1 (en) 2002-01-31 2007-11-21 Inventio Ag Elevator, particularly for transporting passengers
JP3882725B2 (en) 2002-03-12 2007-02-21 株式会社デンソー Vehicular rotary electric machine
GB0206645D0 (en) * 2002-03-21 2002-05-01 Rolls Royce Plc Improvements in or relating to magnetic coils for electrical machines
US6545382B1 (en) 2002-03-29 2003-04-08 Western Digital Technologies, Inc. Spindle motor including stator with magnetic flux guides
DE10215251A1 (en) 2002-04-06 2003-10-16 Bosch Gmbh Robert Electrical machine, in particular, permanent magnet motors
CA2482125C (en) 2002-04-11 2013-05-21 Eocycle Technologies Inc. Transverse flow electric machine with a toothed rotor
DE10217285A1 (en) 2002-04-12 2003-11-06 Coreta Gmbh Electromechanical energy converter
DE10225156A1 (en) 2002-06-06 2003-12-18 Bosch Gmbh Robert Transverse flux, especially unipolar Transversalflussmasschine
CN1649766A (en) 2002-06-11 2005-08-03 安芸电器株式会社 Head lamp of bicycle and head lamp electric circuit
JP4003058B2 (en) 2002-07-17 2007-11-07 株式会社富士通ゼネラル Induction motor
US7859141B2 (en) 2002-08-14 2010-12-28 Volvo Technology Ab Electrical machine and use thereof
DE10242833B4 (en) 2002-09-14 2011-06-01 Mtu Aero Engines Gmbh Electric drive device
DE50211525D1 (en) 2002-11-16 2008-02-21 Minebea Co Ltd Miniature motor with permanent-magnet rotor
DE50211524D1 (en) 2002-11-16 2008-02-21 Minebea Co Ltd Miniature motor with permanent magnet rotor
US6822066B2 (en) * 2002-11-18 2004-11-23 Dow Corning Corporation Organosiloxane resin-polyene materials
GB0228642D0 (en) 2002-12-07 2003-01-15 Rolls Royce Plc An electrical machine
US6882077B2 (en) * 2002-12-19 2005-04-19 Visteon Global Technologies, Inc. Stator winding having cascaded end loops
US6787961B2 (en) * 2002-12-19 2004-09-07 Visteon Global Technologies, Inc. Automotive alternator stator assembly with varying end loop height between layers
US7230361B2 (en) 2003-01-31 2007-06-12 Light Engineering, Inc. Efficient high-speed electric device using low-loss materials
JP4182129B2 (en) 2003-03-24 2008-11-19 ホガナス アクチボラゲット Electrical machinery of the stator
KR101035764B1 (en) * 2003-04-15 2011-05-20 회가내스 아베 Core back of an electrical machine and method for making the same
US20040262105A1 (en) 2003-05-13 2004-12-30 Zhesheng Li Eddy-current wheelend retarder featuring modified rotor skin effect
JP4083071B2 (en) 2003-05-20 2008-04-30 三菱電機株式会社 Rotating electric machine and a control system for a vehicle
US6903485B2 (en) 2003-05-21 2005-06-07 Visteon Global Technologies, Inc. Claw-pole alternator with non-uniform air gap
CN100423408C (en) 2003-05-27 2008-10-01 奥蒂斯电梯公司 Modular transvers flux motor with integrated brake
US6965183B2 (en) 2003-05-27 2005-11-15 Pratt & Whitney Canada Corp. Architecture for electric machine
DE10325085B3 (en) 2003-06-03 2004-12-09 Compact Dynamics Gmbh transverse flux
JP3944140B2 (en) 2003-06-04 2007-07-11 本田技研工業株式会社 Claw pole type motor stator
US20080246362A1 (en) 2003-06-12 2008-10-09 Hirzel Andrew D Radial airgap, transverse flux machine
US20040251761A1 (en) 2003-06-12 2004-12-16 Hirzel Andrew D. Radial airgap, transverse flux motor
US20040251759A1 (en) 2003-06-12 2004-12-16 Hirzel Andrew D. Radial airgap, transverse flux motor
US20050006978A1 (en) 2003-07-07 2005-01-13 Bradfield Michael D. Twin coil claw pole rotor with stator phase shifting for electrical machine
US7242118B2 (en) * 2003-07-31 2007-07-10 Japan Servo Co., Ltd. Toroidal-coil linear stepping motor, toroidal-coil linear reciprocating motor, cylinder compressor and cylinder pump using these motors
US7250704B1 (en) 2003-08-06 2007-07-31 Synchrony, Inc. High temperature electrical coil
JP4062210B2 (en) * 2003-08-20 2008-03-19 松下電器産業株式会社 Linear motion mechanism of the electronic component mounting apparatus
JP2005075106A (en) * 2003-08-29 2005-03-24 Shimano Inc Bicycle hub generator
JP3825024B2 (en) 2003-09-02 2006-09-20 ミネベア株式会社 Claw-pole type stepping motor
JP4041443B2 (en) 2003-09-16 2008-01-30 本田技研工業株式会社 Claw pole type motor stator
US7339292B2 (en) 2003-09-22 2008-03-04 Japan Servo Co., Ltd Motor having shifted teeth of pressed powder construction
JP3964378B2 (en) 2003-10-23 2007-08-22 三菱電機株式会社 Vehicular rotary electric machine
JP2005160143A (en) * 2003-11-20 2005-06-16 Toyota Motor Corp Stator for dynamo-electric machine
JP4413018B2 (en) 2004-01-19 2010-02-10 三菱電機株式会社 AC rotating electric machine
JP2005204480A (en) 2004-01-19 2005-07-28 Mitsubishi Electric Corp Rotor of rotary electric machine, and rotary electric machine
JP4109639B2 (en) 2004-02-17 2008-07-02 三菱電機株式会社 The rotor of the rotating electrical machine
US7385330B2 (en) 2004-02-27 2008-06-10 Board Of Regents Of The Nevada System Of Higher Education On Behalf Of The University Of Nevada, Reno Permanent-magnet switched-flux machine
DE102004018520A1 (en) 2004-04-14 2005-11-03 Voith Turbo Gmbh & Co. Kg stator
US7116029B2 (en) 2004-07-19 2006-10-03 Rt Patent Company, Inc. AC induction motor having multiple poles and increased stator/rotor gap
US7345387B2 (en) 2004-08-09 2008-03-18 Mitsubishi Denki Kabushiki Kaisha Dynamoelectric machine
US7514833B2 (en) 2004-09-03 2009-04-07 Ut-Battelle Llc Axial gap permanent-magnet machine with reluctance poles and PM element covers
US20060082237A1 (en) 2004-10-20 2006-04-20 Raser Technologies, Inc. Toroidal AC motor
KR100603943B1 (en) 2004-10-22 2006-07-25 한국전기연구원 Bi-direction operating linear compressor using transverse flux linear motor
US20060091755A1 (en) 2004-10-28 2006-05-04 Precise Automation, Llc Transverse flux switched reluctance motor and control methods
US20080211336A1 (en) 2004-11-11 2008-09-04 Abb Research Ltd. Rotating Transverse Flux Machine
US6989622B1 (en) 2004-11-23 2006-01-24 Visteon Global Technologies, Inc. Alternator having claw-pole rotor
WO2006074627A1 (en) 2005-01-13 2006-07-20 Schaeffler Kg Power supply device for an electric motor method for operation of an electric motor
JP4369377B2 (en) 2005-02-04 2009-11-18 三菱電機株式会社 The rotary electric machine
JP4677812B2 (en) 2005-03-30 2011-04-27 株式会社デンソー Tandem rotary electric machine
US20090021099A1 (en) 2005-04-11 2009-01-22 Pulsed Inertial Electric Motor Pulsed Inertial Electric Motor
DE102005020952A1 (en) 2005-05-04 2006-11-16 Bosch Rexroth Aktiengesellschaft Phase module for a transverse flux
JP2006333652A (en) * 2005-05-27 2006-12-07 Nikki Denso Kk Linear motor and precision rotary table
WO2007000054A1 (en) 2005-06-29 2007-01-04 Eocycle Technologies Inc. Transverse flux electrical machine with segmented core stator
JP4380652B2 (en) 2005-08-26 2009-12-09 株式会社デンソー The rotor of the rotating electrical machine
KR100970532B1 (en) 2005-08-26 2010-07-16 회가내스 아베 An electric machine assembly
JP4706397B2 (en) 2005-08-30 2011-06-22 株式会社デンソー The rotor and its manufacturing method of a rotating electric machine
JP2007124884A (en) 2005-09-30 2007-05-17 Hitachi Industrial Equipment Systems Co Ltd Claw pole type rotary electric machine
US7348706B2 (en) * 2005-10-31 2008-03-25 A. O. Smith Corporation Stator assembly for an electric machine and method of manufacturing the same
US20070188037A1 (en) * 2006-02-15 2007-08-16 Lau Shing L An add-on kit comprising a ring of magnets installed onto a bicycle/car wheel; electromagnets installed onto a bike fork or car suspension which then provide assisted rotation.
DE102006016503A1 (en) 2006-04-07 2007-10-18 Siemens Ag A dispensing device for an electrical machine
JP4968509B2 (en) 2006-04-13 2012-07-04 株式会社デンソー Tandem vehicle alternator
DE102006022836A1 (en) 2006-05-16 2007-11-22 Minebea Co., Ltd. Stator and rotor assembly for a transverse flux
DE102006026719B4 (en) 2006-06-08 2012-04-26 Minebea Co., Ltd. Claw pole stator for a stepping motor and claw pole stepping motor
DE102006048561A1 (en) 2006-10-13 2008-04-17 Robert Bosch Gmbh Transverse flux machine, has stator composed of ring segment-shaped sections in its circumferential direction, where sections stay in force-fit connection with one another and are mechanically connected with one another
JP4692464B2 (en) 2006-10-16 2011-06-01 株式会社デンソー Vehicle AC generator
DE102006050201A1 (en) 2006-10-25 2008-04-30 Robert Bosch Gmbh The transverse flux machine and method for producing a transverse flux machine
DE102006051234A1 (en) 2006-10-31 2008-05-08 Robert Bosch Gmbh Transversal flux machine, has rotor arranged rotatably opposite to stator, which is provided with set of yokes for guiding winding, where yokes have side piece with varying height along width of side piece
DE102006052766A1 (en) 2006-11-09 2008-07-31 Robert Bosch Gmbh A process for producing a transverse flux
JP2008131732A (en) * 2006-11-20 2008-06-05 Sumitomo Electric Ind Ltd Driver for rotor
CN101207314B (en) 2006-12-18 2010-09-01 北京前沿科学研究所 Steady frequency phase locking generator adapting for variety torque power
US20080179982A1 (en) * 2007-01-30 2008-07-31 Arvinmeritor Technology, Llc Transverse flux, switched reluctance, traction motor with bobbin wound coil, with integral liquid cooling loop
WO2008098403A3 (en) 2007-02-15 2008-10-02 Gloor Engineering Electric machine
DE102007011369B3 (en) 2007-03-07 2008-04-10 Voith Patent Gmbh Rotor arrangement for single-sided transversal flow machine, has rotor unit provided with rotor shoe to stator unit, where adjacent rotor shoe is connected with inference unit, and flow concentration stays with stator arrangement
US7868510B2 (en) 2007-03-30 2011-01-11 Rittenhouse Norman P High-efficiency wheel-motor utilizing molded magnetic flux channels with transverse-flux stator
DE102007018930A1 (en) 2007-04-21 2008-10-23 Robert Bosch Gmbh Electric machine composed of sheet metal teeth
US7973444B2 (en) 2007-04-27 2011-07-05 Remy Technologies, Inc. Electric machine and rotor for the same
US7973446B2 (en) 2007-05-09 2011-07-05 Motor Excellence, Llc Electrical devices having tape wound core laminate rotor or stator elements
US7876019B2 (en) 2007-05-09 2011-01-25 Motor Excellence, Llc Electrical devices with reduced flux leakage using permanent magnet components
DE102007034929A1 (en) 2007-07-24 2009-02-05 Robert Bosch Gmbh transverse flux
US8129880B2 (en) 2007-11-15 2012-03-06 GM Global Technology Operations LLC Concentrated winding machine with magnetic slot wedges
KR100960880B1 (en) 2007-12-05 2010-06-04 한국전기연구원 Three phase permanent magnet excited transverse flux linear motor
US7579742B1 (en) 2008-01-17 2009-08-25 Norman Rittenhouse High-efficiency parallel-pole molded-magnetic flux channels transverse wound motor-dynamo
CN101978578A (en) 2008-03-19 2011-02-16 霍加纳斯股份有限公司 Integrated rotor pole pieces
ES2373776T3 (en) 2008-03-19 2012-02-08 Höganäs Ab (Publ) Permanent magnet rotor pole pieces with flux concentration.
EP2265437A1 (en) 2008-03-19 2010-12-29 Höganäs Ab (publ) Stator compacted in one piece
EP2283496A4 (en) 2008-04-14 2014-10-29 Inductotherm Corp Variable width transverse flux electric induction coils
CN201264675Y (en) 2008-07-15 2009-07-01 苏州市德豪电器配件有限公司 Highly effective energy-saving main unit type electric motorcycle
EP2148410A1 (en) 2008-07-21 2010-01-27 Siemens Aktiengesellschaft Electric machine with cascaded winding structure
US7709992B2 (en) 2008-07-31 2010-05-04 Emerson Electric Co. Electric machine
US7830057B2 (en) 2008-08-29 2010-11-09 Hamilton Sundstrand Corporation Transverse flux machine
US20120286592A1 (en) 2008-09-26 2012-11-15 Dumitru Bojiuc Permanent Magnet Operating Machine
JP2012508555A (en) * 2008-11-03 2012-04-05 モーター エクセレンス, エルエルシー Rotor concept of lateral and / or Konmyuteto formula flux system
DE102008054381A1 (en) 2008-12-08 2010-06-10 Robert Bosch Gmbh Electric machine with a flywheel
CN101552534B (en) 2009-05-19 2011-05-11 哈尔滨工业大学 Transverse flux cylinder type permanent magnet linear synchronous motor
EP2254091A1 (en) 2009-05-19 2010-11-24 Autoliv Development AB Vision system and method for a motor vehicle
KR101048055B1 (en) 2009-09-11 2011-07-11 한국전기연구원 Transverse flux electric machine to form a slit in the core
EP2317633A3 (en) 2009-10-28 2012-08-08 University of Bahrain Transverse Flux Machine
US8299677B2 (en) 2009-12-04 2012-10-30 Hamilton Sundstrand Corporation Transverse regulated flux machine
DE102009060959A1 (en) 2009-12-30 2011-07-07 Robert Bosch GmbH, 70469 transverse flux
DE102009060955A1 (en) 2009-12-30 2011-07-07 Robert Bosch GmbH, 70469 Stator winding for a transverse flux machine and this method of manufacturing a stator winding
DE102009060956A1 (en) 2009-12-30 2011-07-07 Robert Bosch GmbH, 70469 Stator winding for a transverse flux
US8390160B2 (en) 2010-01-14 2013-03-05 Hamilton Sundstrand Corporation Compact electromechanical actuator
CN101834510A (en) 2010-05-21 2010-09-15 浙江大学;浙江井田机电股份有限公司 Moving-magnet type transverse flux linear oscillatory motor for direct-drive compressor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020113520A1 (en) * 2000-05-05 2002-08-22 Guenter Kastinger Unipolar transverse flux machine
US6657329B2 (en) * 2000-05-05 2003-12-02 Robert Bosch Gmbh Unipolar transverse flux machine
US6882066B2 (en) * 2000-07-26 2005-04-19 Robert Bosch Gmbh Unipolar transverse flux machine
US20020070627A1 (en) * 2000-09-06 2002-06-13 Ward Robert W. Stator core design
US20040207281A1 (en) * 2001-07-09 2004-10-21 Andrej Detela Hybrid synchronous electric machine
US20050062352A1 (en) * 2001-08-16 2005-03-24 Guenter Kastinger Unipolar transverse magnetic flux machine
US7358639B2 (en) * 2002-01-30 2008-04-15 Caamano Ramon A High frequency electric motor or generator
US20070152528A1 (en) * 2005-12-29 2007-07-05 Korea Electro Technology Research Institute Permanent magnet excited transverse flux motor with outer rotor
US20080211326A1 (en) * 2006-12-28 2008-09-04 Korea Electro Technology Research Institute Inner rotor type permanent magnet excited transverse flux motor
US20080315700A1 (en) * 2007-06-19 2008-12-25 Hitachi, Ltd. Rotating Electrical Machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9722479B2 (en) 2012-08-03 2017-08-01 Eocycle Technologies Inc. Wind turbine comprising a transverse flux electrical machine
US9755492B2 (en) 2012-08-03 2017-09-05 Eocycle Technologies Inc. Rotatable transverse flux electrical machine
US9419486B2 (en) 2012-09-24 2016-08-16 Eocycle Technologies Inc. Housing less transverse flux electrical machine
US9559558B2 (en) 2012-09-24 2017-01-31 Eocycle Technologies Inc. Modular transverse flux electrical machine assembly
US9559559B2 (en) 2012-09-24 2017-01-31 Eocycle Technologies Inc. Transverse flux electrical machine stator with stator skew and assembly thereof
US9559560B2 (en) 2012-09-24 2017-01-31 Eocycle Technologies Inc. Transverse flux electrical machine stator phases assembly
US9331531B2 (en) 2012-10-17 2016-05-03 Eocycle Technologies Inc. Method of manufacturing a transverse flux electrical machine rotor
US9876401B2 (en) 2012-10-17 2018-01-23 Eocycle Technologies Inc. Transverse flux electrical machine rotor
DE102012222194A1 (en) * 2012-12-04 2014-06-05 Schaeffler Technologies Gmbh & Co. Kg Method for producing transverse flux machine, involves inserting primary sub-segments in conductor ring, and bonding mechanically primary sub-segments with one another to circular primary ring

Also Published As

Publication number Publication date Type
WO2010062765A2 (en) 2010-06-03 application
US20100109462A1 (en) 2010-05-06 application
CN102227862A (en) 2011-10-26 application
KR20110086063A (en) 2011-07-27 application
US20120001501A1 (en) 2012-01-05 application
US20100109453A1 (en) 2010-05-06 application
WO2010062766A2 (en) 2010-06-03 application
WO2010062766A3 (en) 2010-08-12 application
US7868508B2 (en) 2011-01-11 grant
KR20110084902A (en) 2011-07-26 application
EP2342800A2 (en) 2011-07-13 application
CN102257709A (en) 2011-11-23 application
KR20110093803A (en) 2011-08-18 application
US8030819B2 (en) 2011-10-04 grant
US7851965B2 (en) 2010-12-14 grant
US20110062723A1 (en) 2011-03-17 application
JP2012508549A (en) 2012-04-05 application
US8193679B2 (en) 2012-06-05 grant
EP2342803A2 (en) 2011-07-13 application
WO2010062765A3 (en) 2010-08-19 application
US20100109452A1 (en) 2010-05-06 application
CN102257708A (en) 2011-11-23 application
US20110259659A1 (en) 2011-10-27 application
EP2342802A2 (en) 2011-07-13 application
US8008821B2 (en) 2011-08-30 grant
JP2012508555A (en) 2012-04-05 application
US8242658B2 (en) 2012-08-14 grant
US7923886B2 (en) 2011-04-12 grant
US20110050010A1 (en) 2011-03-03 application
US20110148225A1 (en) 2011-06-23 application
WO2010062764A3 (en) 2010-08-19 application
WO2010062764A2 (en) 2010-06-03 application
JP2012507983A (en) 2012-03-29 application
US7994678B2 (en) 2011-08-09 grant

Similar Documents

Publication Publication Date Title
US5130595A (en) Multiple magnetic paths machine
Qu et al. Dual-rotor, radial-flux, toroidally wound, permanent-magnet machines
Chan et al. A novel polyphase multipole square-wave permanent magnet motor drive for electric vehicles
US6777851B2 (en) Generator having axially aligned stator poles and/or rotor poles
US6765327B2 (en) Integral driveline support and electric motor
US7190101B2 (en) Stator coil arrangement for an axial airgap electric device including low-loss materials
US6750588B1 (en) High performance axial gap alternator motor
US6924574B2 (en) Dual-rotor, radial-flux, toroidally-wound, permanent-magnet machine
Guo et al. Development of a PM transverse flux motor with soft magnetic composite core
US20090021089A1 (en) Motor and control unit thereof
US20060131985A1 (en) Electrical machines and assemblies including a yokeless stator with modular lamination stacks
Nagorny et al. Design aspects of a high speed permanent magnet synchronous motor/generator for flywheel applications
Atallah et al. A novel “Pseudo” direct-drive brushless permanent magnet machine
US6064132A (en) Armature structure of a radial rib winding type rotating electric machine
US6664704B2 (en) Electrical machine
US6946771B2 (en) Polyphase claw pole structures for an electrical machine
US6828710B1 (en) Airgap armature
Cavagnino et al. A comparison between the axial flux and the radial flux structures for PM synchronous motors
Wang et al. Modular three-phase permanent-magnet brushless machines for in-wheel applications
US6211595B1 (en) Armature structure of toroidal winding type rotating electric machine
Capponi et al. Recent advances in axial-flux permanent-magnet machine technology
US4980595A (en) Multiple magnetic paths machine
Chan Axial-field electrical machines-design and applications
US6486582B1 (en) Dynamo-electric machine rotating by electromagnetic induction such as it acts in linear electric motors
US20030057796A1 (en) Modularized stator

Legal Events

Date Code Title Description
AS Assignment

Owner name: MOTOR EXCELLENCE, LLC., ARIZONA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CALLEY, DAVID G.;JANECEK, THOMAS F.;SIGNING DATES FROM 20091104 TO 20091105;REEL/FRAME:026628/0722

AS Assignment

Owner name: ELECTRIC TORQUE MACHINES, INC., ARIZONA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOTOR EXCELLENCE, LLC;REEL/FRAME:029131/0506

Effective date: 20120702