WO2011105986A1 - Moteur à courant alternatif sans balai - Google Patents

Moteur à courant alternatif sans balai Download PDF

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Publication number
WO2011105986A1
WO2011105986A1 PCT/US2010/000610 US2010000610W WO2011105986A1 WO 2011105986 A1 WO2011105986 A1 WO 2011105986A1 US 2010000610 W US2010000610 W US 2010000610W WO 2011105986 A1 WO2011105986 A1 WO 2011105986A1
Authority
WO
WIPO (PCT)
Prior art keywords
circular
rotor
motor
stator
solenoid
Prior art date
Application number
PCT/US2010/000610
Other languages
English (en)
Inventor
S. Peter Lee
Original Assignee
Lee S Peter
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
Application filed by Lee S Peter filed Critical Lee S Peter
Priority to PCT/US2010/000610 priority Critical patent/WO2011105986A1/fr
Priority to CN2010800365941A priority patent/CN102484398A/zh
Publication of WO2011105986A1 publication Critical patent/WO2011105986A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/47—Air-gap windings, i.e. iron-free windings

Definitions

  • the invention generally pertains to electrical motors and more particularly to a brushless a-c motor that utilizes a non-conductive stator having wire windings that are wound parallel to the longitudinal axis of the stator.
  • Electrical motors are generally classified as alternating-current (a-c) motors or direct-current (d-c) motors. In either classification the motors are designed to receive electrical energy and convert that energy into mechanical energy, also referred to as "torque".
  • A-c motors are used more often than d-c motors because of the availability of a-c power over d-c power. All motors however, sustain energy losses in converting the electrical energy to the mechanical energy. This loss is due to bearing friction, cogging, the resistance loss that occurs by current flowing through the conductors of the motor armature, the electrical field and core losses that are due to hysteresis and eddy currents. These losses can contribute to a non-smooth rotation, the production of heat and lower efficiency.
  • Prior art motors utilize laminated metal stators that have wire windings which are wound perpendicular to the longitudinal axis of the rotor. The windings produce the magnetic force that pushes or pulls against a set of magnets which are located around the rotor of the motor.
  • the inventive brushless a-c motor utilizes a stator that is made of a non-conductive material such as plastic and a metal rotor that rotates around the stator to produce a rotational force.
  • the non-conductive stator has wire windings that are wound parallel to the longitudinal axis of the stator. The rotational force is produced when current flows through the wires.
  • the combination of the non-conductive stator, the permanent magnets in the rotor and the novel wire winding eliminates or at least minimizes the problems listed above for the prior art motors. Additionally, the inventive design provides a high efficiency electrical energy converter.
  • the 7,183,686 patent discloses a synchronous motor that includes a stator, a rotor and permanent magnets.
  • the rotor includes a rotor iron core that rotates relative to the stator, and a plurality of conductor bars accommodated within corresponding slots in the rotor iron core.
  • the conductor bars have opposite ends that are short circuited by respective short circuit rings to form a starter cage conductor.
  • the rotor also has a plurality of magnet retaining slots located on an inner side of the conductor bars, in which permanent magnets are embedded.
  • the 7,183,684 patent discloses a permanent magnet rotary motor that can maintain a higher torque density and reduce cogging torque when compared to a conventional permanent magnet rotary motor.
  • a pair of end surfaces from each permanent magnet is used for a rotor that is placed substantially parallel to a virtual plane.
  • the virtual plane extends in the radial direction of a rotor core while passing through the centers of a stator core.
  • the 5,894,183 patent discloses a permanent magnet rotor for an electric generator or motor having a core lamination hub formed from a stack of round plates.
  • the plates have peripheral slots for holding the first end of a rectangular magnet.
  • Each magnet has an outer end which is held by a slotted pole piece formed from laminated plates.
  • a first and a second side plate overlie each side of the lamination hub, the magnets and the pole pieces.
  • Fasteners are passed through holes in the side plates, hub plates and pole pieces to form a rigid rotor.
  • the 4,393,320 patent discloses a permanent magnet rotor comprising a housing defining a central rotor axis and an inner ring secured within the housing. Annularly extending around the rotor axis is a plurality of permanent magnets that are annularly spaced around the inner ring. An outer ring is secured within the housing and annularly extending around the permanent magnets are a plurality of outer ring segments.
  • the rotor has a filler material that fills the spaces between adjacent permanent magnets and adjacent the outer ring segments.
  • the brushless a-c motor (BACM) disclosed herein is designed to provide a high performance motor that features a stator which is made of a non-conductive material and has windings that are wound parallel to the longitudinal axis of the stator.
  • the BACM is comprised of four major elements: a circular stator, a circular rotor, a bearing and a circular belt
  • the circular stator is made of plastic and includes an outer surface, a left intermediate surface and a right surface.
  • the outer surface has a multiplicity of longitudinally extending wire notches. Extending from the left intermediate surface is a first set of wire attachment structures and an integral central protrusion.
  • a second set of wire attachment structures From the right surface of the stator extends a second set of wire attachment structures. Around and between the two sets of attachment structures and inserted into the longitudinal wiring notches is a multiplicity of insulated wires that are wound parallel to the longitudinal axis of the stator. The ends of the wires exit the stator through a wire exit slot and terminate at an input a-c power source that can be comprised of a singe-phase power source, a two-phase power source or a three-phase power source. The frequency of the input power is proportionally synchronized with the rotational speed of the rotor which is controlled by an electronic control unit.
  • the circular rotor which is dimensioned to rotate around the outer surface of the stator, includes an inner surface, an outer surface, a right edge and a left edge. To the inner surface is longitudinally attached a multiplicity of permanent magnets that are equally spaced with alternating north (N) and south (S) poles. To the rotor's right edge is attached a right circular plate and to the rotor's left edge is a left circular plate having a perimeter edge that is spaced from the inner surface of the cylindrical cylinder. The left circular plate also has a centered bore that is dimensioned to be attached over the central protrusion located on the stator.
  • the central protrusion further includes a terminus from where extends a rod support cavity that terminates within the confines of the circular stator. Into the cavity is inserted a rigidly attached motor support rod that provides structural integrity and stability to the BACM.
  • the bearing has a perimeter edge that interfaces with the inner surface of the rotor.
  • the bearing is designed to support the rotor without the need for a motor shaft and to add structural integrity to the BACM which significantly reduces motor vibrations.
  • the circular belt has a first end that is located around the outer surface of the circular rotor, and a second end that is located around a rotating work piece. Since the belt is located around the rotor, a motor shaft is not required.
  • the primary object of the invention is to produce a
  • BACM that utilizes a plastic stator that eliminates the cogging and eddy currents that are prevalent in prior art motors. Additionally, the design of the BACM results in smooth rotation, produces less heat and provides higher torque and speed than similarly sized prior art motors.
  • the back EMF can also be used to provide and control the speed of the rotor and in particular a low motor speed, • can be utilized as a generator by driving the rotor and producing a three-phase voltage source on the stator wiring, and
  • FIGURE 1 is a side elevational-sectional view of a brushless a-c motor that operates with a stator made of plastic and having insulated wires that are wound parallel to the longitudinal axis of the stator.
  • FIGURE 2 is a side elevational view of the stator showing a multiplicity of wire attachment structures and wiring notches that are used to wind and retain the insulated wires referenced in FIGURE 1.
  • FIGURE 3 is an illustration showing the wiring sequence for an a-c power source consisting of a three-phase a-c power.
  • FIGURE 4 is an elevational end view of the rotor's right circular plate showing the arrangement of a set of cooling fins that provide cooling air when the rotor is rotating.
  • FIGURE 5 is a sectional end view of the rotor showing the placement of twelve permanent magnets wherein the maximum number of magnets is dependent upon the space available on the rotor.
  • FIGURE 6 is a sectional end view of a circular rotor and a left circular plate showing a rotor locking solenoid inserted into one of a plurality of locking cavities.
  • FIGURE 7 is a side elevational-sectional view of a brushless a-c motor that is adapted for rotating a wheel of a vehicle.
  • the preferred embodiment of the BACM 10 is designed to operate as a general-purpose a-c motor.
  • the BACM 10 can be designed to be powered by either a single- phase, a two-phase or a three phase a-c power source that is proportionally synchronized with the rotational speed of the rotor 44.
  • the invention disclosure will be limited to a three-phase a-c power source 180, as shown in the FIGURE 3 illustration.
  • the preferred embodiment of the BACM 10 is comprised of eight major elements: a stator 12, a motor support rod 38, a rotor 44, a multiplicity of permanent magnets 56, a right circular cooling plate 64, a left circular plate 74, a bearing 80 and a motor support stand 90.
  • the circular stator 12 as shown assembled in FIGURE 1 and removed from the assembly in FIGURE 2, is constructed of a non-conductive material that can be selected from the group consisting of polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), acrylic, polycarbonate, nylon, phenolic, polyurethane and TEFLON®.
  • PVC polyvinyl chloride
  • ABS acrylonitrile butadiene styrene
  • acrylic polycarbonate
  • nylon phenolic
  • polyurethane polyurethane
  • the stator 12 includes an outer surface 14, a left intermediate surface 16 from where extends integrally a central protrusion 20 having a terminus 22, and a right surface 34.
  • the outer surface 14, as best shown in FIGURE 2 includes a multiplicity of longitudinally extending wiring notches 36.
  • thirty-six notches are required when twelve permanent magnets 56 are attached to the rotor 44.
  • From the left intermediate surface 16 and from the right surface 34 extend a multiplicity of wire attachment structures 18.
  • a total of eighteen wire attachment structures 18 are required on both the left intermediate surface 16 and on the right surface 34. For clarity, only two sets of the structures 18 are shown in FIGURE 1.
  • the wiring structures 18 can be selected from the group consisting of studs, hooks, open eyelets and a pair of compressed springs.
  • a multiplicity of insulated wires 32 that are wound parallel to the longitudinal axis of the stator 12.
  • the ends of the wires 32 are inserted through a wire exit slot 24 that is located on the surface of the central protrusion 20. From the wire exit slot 24, which is dimensioned to accommodate the wiring from the three-phase power source, the wiring extends outward and terminates at the a-c power source 180, as shown in FIGURE 1.
  • the central protrusion 20 also includes a rod support cavity 26 that extends from the terminus 22 of the protrusion 20 and that terminates within the circular stator 12, and a keyed slot 28 that extends longitudinally along the surface 30 of the rod support cavity 26.
  • the motor support rod 38 is made of a metal such as stainless steel and its function is to provide structural integrity and stability to the BACM 10.
  • the rod 38 is dimensioned to be inserted into the rod support cavity 26 that extends from the central protrusion 20 into the stator 12.
  • a longitudinal keyed tab 40 that is dimensioned to interface with the keyed slot 28 that extends along the rod support cavity 26. The combination of the keyed slot 28 and the keyed tab 40 maintains the motor support rod 38 in a secured fixed position.
  • the circular rotor 44 as shown in FIGURES 1, 5 and 6, is dimensioned to rotate around the outer surface 14 of the circular stator 12.
  • the rotor 44 which is constructed of metal, is further comprised of a circular cylinder 46 having radially therethrough a plurality of cooling air outlets 62, a right circular cooling plate 64, a left, fixed locking plate 74 and a multiplicity of permanent magnets 56.
  • the inner surface 48 of the circular rotor 44 can include a magnet spacer 68 or a magnet groove 70 that further secure and maintain the magnets 56 in alignment.
  • the plate 74 as shown in FIGURES 1 and 6, includes an electrically operated, rotor-locking solenoid 42 that can engage a plurality of locking cavities 58 that are located around the peripheral inner surface 48 of the circular cylinder 46, as shown best in FIGURE 6.
  • the right circular cooling plate 64 has a diameter with a perimeter edge 66 that is attached flush with the right edge 52 of the cylinder 46 by an attachment means such as a bolt 60.
  • the plate 64 further has a plurality of inward facing fins 72, as shown best in FIGURE 4, that produce an in-flow of cooling air when the rotor 44 is rotating. The inflow air is exhausted through the cooling air outlets 62, as shown in FIGURE 1.
  • the left circular plate 74 has a diameter with a perimeter edge 76 that is spaced from the inner surface 48 and flush with the left edge 54 of the cylinder 46.
  • the plate 74 further has a centered bore 78 that is dimensioned to fit over and be attached to the central protrusion 20 located on the stator 12.
  • the perimeter edge 76 has a solenoid cavity 77 into which is inserted an electrically powered, spring-loaded solenoid 42.
  • the solenoid is positioned to engage one of a plurality of locking cavities 58 that are located around the inner surface 48 of the circular cylinder 46, as shown in FIGURE 6.
  • the solenoid 42 is powered, the solenoid 42 is placed in retracted position, allowing the rotor 44 to rotate.
  • the solenoid 42 is not powered, the solenoid 42 is placed in an extended position that locks the rotor 44.
  • the centerline of each locking cavity 58 is aligned with the centerline of a north (N) pole or a south (S) pole of a corresponding magnet 56 to establish a fixed relative position.
  • This position further establishes a rotor starting point that is utilized by an electronics control unit (not shown) to determine if the rotor 44 is to rotate in either a clockwise or a counter-clockwise direction. Other methods of establishing a fixed relative position can also be utilized.
  • the rotor 44, the right circular plate 64, the left circular plate 74 and the motor support rod 38 can be made of a material that is selected from the group consisting of metal or plastic, wherein the plastic is further selected from the group consisting of polyphenylene, polyamide-imide and polyetherimide.
  • the multiplicity of permanent magnets 56 are longitudinally attached by an attachment means such as a heat-resistant adhesive, to the inner surface 48 of the circular cylinder 46.
  • the magnets 56 are also equally spaced around the circumference of the circular cylinder 46, with alternating north (N) and south (S) poles, a total of twelve magnets are shown in FIGURE 5.
  • N north
  • S south
  • the number of permanent magnets 56 can be any even number and depends upon the space that is available on the rotor 44.
  • the permanent magnets 56 can be selected from the group consisting of Alnico, ceramic, samarium cobalt or Neodymium-iron-boron or the like.
  • the bearing 80 as shown in FIGURE 1, has an outer diameter with a perimeter edge 82 that interfaces with the inner surface 48 of the circular cylinder 46.
  • the bearing 80 is held laterally in place by a right retaining ring 84 and a left retaining ring 86, and directly and securely supports the rotor 44 without the need for a motor shaft. Thus eliminating or at least significantly reducing motor vibration.
  • the bearing (80) can consist of a conventional roller bearing or a permanently lubed steel ball bearing.
  • the motor support stand 90 can be produced in several designs.
  • An example of a typical stand 90, as shown in FIGURE 1, includes a base 92 having means for being attached to a work surface 182, and an integral vertical section 94.
  • the vertical section 94 has a bore 96 that fits over the central protrusion 20 located on the circular stator 12, and has means for being attached to the terminus 22 of the central protrusion 20.
  • the means for attaching the right circular plate 64 and the vertical section 94 of the support stand 90 can be comprised of a threaded boh 60.
  • the BACM 10 does not require an output shaft to transfer the electrical energy to a mechanical energy.
  • a circular belt 98 can be utilized that has a first end that is wound around the outer surface 50 of the circular rotor 44 and a second end that is wound around a rotating work piece (not shown).
  • the outer surface 50 of the rotor 44 can include a pair of belt securement tabs 88, as shown in FIGURE 1.
  • the wheel attachment structure 100 is comprised of a cylindrical cylinder 46, a tire rim 112 and a tire 134.
  • the circular cylinder 46 has an inner surface 48 and an outer surface 50. From the outer surface 50 and adjacent the left edge 54 of the cylinder 46 extends outward an inner mounting tab 102.
  • the tab 102 has an outer side 104 and an inner side 106, wheref om the inner side 106 extends inward a threaded mounting stud 108.
  • the tire rim 112 has an inner surface 114 and an outer surface 116. From the inner side 1 14 extends downward an outer mounting tab 118 having an outer side 120 and an inner side 122. The inner side 106 of the inner mounting tab 102 interfaces with the outer side 120 of the outer mounting tab 118.
  • the outer mounting tab 1 18 further has a bore 124 that is dimensioned to accept the threaded mounting stud 108 that secures both the tabs 102,118 when a nut 60 is tightened on the mounting stud 108.
  • the tire rim 1 12 further has on each rim end 128 a tire mounting structure 130 that interfaces with a tire bead 132 of a tire 134.
  • a motor shaft and gear assembly can easily be attached to the circular rotor 44 to transfer power.
  • the BACM 10 could be modified to function as a generator by driving the rotor 44 and producing a three-phase voltage from the stator 12.
  • the BACM 10 is primarily designed to function with a single non- conductive stator 12 and a single rotor 44 that utilizes a plurality of permanent magnets 56.
  • a design having multiple stators 12 and rotors 44 that are concentrically aligned and located around a common single shaft can also be utilized. With this design, a maximum number of magnets 56 and wiring 32, as allowed by the space available, can be utilized to provide a high power output.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention porte sur un moteur à courant alternatif sans balai (BACM) (10) constitué par un stator non conducteur (12) et un rotor (44). Le rotor (44) présente une surface extérieure (50), une surface droite (34) et une surface intermédiaire gauche (16) d'où part une protubérance (20) ayant une cavité (26) dans laquelle est insérée une tige support de moteur (38). Le stator (12) comprend une multiplicité d'encoches de bobinage s'étendant longitudinalement (36) et, sur la surface intermédiaire gauche (16) et la surface droite (34), sont disposées des structures de fixation de fil (18). Autour et entre les structures (18) et les encoches (36), est bobinée une multiplicité de fils isolés (32) qui se terminent à une source d'alimentation en courant alternatif (180). Le rotor (44) présente une surface intérieure (48) qui porte, attachés longitudinalement, une multiplicité d'aimants (56) et qui est attachée à un palier (80), qui est attaché à la protubérance centrale (20). Pour faire travailler le BACM (10), une extrémité d'une courroie circulaire (98) est placée autour du rotor (44) et l'extrémité opposée est insérée sur une pièce à travailler.
PCT/US2010/000610 2010-02-26 2010-02-26 Moteur à courant alternatif sans balai WO2011105986A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2010/000610 WO2011105986A1 (fr) 2010-02-26 2010-02-26 Moteur à courant alternatif sans balai
CN2010800365941A CN102484398A (zh) 2010-02-26 2010-02-26 无刷交流马达

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2010/000610 WO2011105986A1 (fr) 2010-02-26 2010-02-26 Moteur à courant alternatif sans balai

Publications (1)

Publication Number Publication Date
WO2011105986A1 true WO2011105986A1 (fr) 2011-09-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/000610 WO2011105986A1 (fr) 2010-02-26 2010-02-26 Moteur à courant alternatif sans balai

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CN (1) CN102484398A (fr)
WO (1) WO2011105986A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10411544B2 (en) 2016-10-03 2019-09-10 Steering Solutions Ip Holding Corporation Brushless motor assembly
WO2019061127A1 (fr) * 2017-09-28 2019-04-04 Schaeffler Technologies AG & Co. KG Ensemble générateur d'extrémité d'essieu, ensemble roues et bogie
DE102018102976A1 (de) * 2018-02-09 2019-08-14 Nidec Corp. Drahthalter
JP7393125B2 (ja) * 2018-03-13 2023-12-06 フスコ オートモーティブ ホールディングス エル・エル・シー 中間状態を有する双安定ソレノイド

Citations (14)

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US4097754A (en) * 1976-10-20 1978-06-27 Tecumseh Products Company Short pitch alternator
US4663536A (en) * 1985-03-04 1987-05-05 Precise Power Corporation A.C. motor-generator
US4728833A (en) * 1985-07-15 1988-03-01 Shicoh Engineering Co., Ltd. 1-phase self-starting brushless motor
US5767601A (en) * 1995-12-19 1998-06-16 Mitsuba Corporation Permanent magnet electric generator
US6093984A (en) * 1998-08-21 2000-07-25 Kabushiki Kaisha Toshiba Rotor for electric motor
US6396177B1 (en) * 1999-01-08 2002-05-28 Lg Electronics Inc. Structure of rotor for outer rotor type brushless motor
US6429566B1 (en) * 1999-11-10 2002-08-06 Isuzu Motors Limited Rotor of rotating machine
US6727632B2 (en) * 2001-11-27 2004-04-27 Denso Corporation Flat rotary electric machine
US6751842B2 (en) * 1999-04-30 2004-06-22 Precise Power Corporation Method of constructing a rotor for use in a high speed controlled-pole electric machine
US6759779B2 (en) * 2002-01-24 2004-07-06 Visteon Global Technologies, Inc. Automotive alternator stator assembly with rectangular continuous wire
US6798092B1 (en) * 2000-10-12 2004-09-28 Christopher W. Gabrys Low outgas flywheel motor/generator
US7004730B1 (en) * 2003-04-21 2006-02-28 Rowan Electric, Inc. Integral shaft for use in mud pumps
US7015616B2 (en) * 2002-04-01 2006-03-21 Honeywell International, Inc. System and method for providing coil retention in the rotor windings of a high speed generator
US7687959B1 (en) * 2007-12-17 2010-03-30 Lee S Peter Brushless a-c motor

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US6433448B1 (en) * 1998-11-17 2002-08-13 Eaton Corporation Integrated torque motor and throttle body
JP4490621B2 (ja) * 2002-06-20 2010-06-30 株式会社東芝 外転形永久磁石モータの回転子

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097754A (en) * 1976-10-20 1978-06-27 Tecumseh Products Company Short pitch alternator
US4663536A (en) * 1985-03-04 1987-05-05 Precise Power Corporation A.C. motor-generator
US4728833A (en) * 1985-07-15 1988-03-01 Shicoh Engineering Co., Ltd. 1-phase self-starting brushless motor
US5767601A (en) * 1995-12-19 1998-06-16 Mitsuba Corporation Permanent magnet electric generator
US6093984A (en) * 1998-08-21 2000-07-25 Kabushiki Kaisha Toshiba Rotor for electric motor
US6396177B1 (en) * 1999-01-08 2002-05-28 Lg Electronics Inc. Structure of rotor for outer rotor type brushless motor
US6751842B2 (en) * 1999-04-30 2004-06-22 Precise Power Corporation Method of constructing a rotor for use in a high speed controlled-pole electric machine
US6429566B1 (en) * 1999-11-10 2002-08-06 Isuzu Motors Limited Rotor of rotating machine
US6798092B1 (en) * 2000-10-12 2004-09-28 Christopher W. Gabrys Low outgas flywheel motor/generator
US6727632B2 (en) * 2001-11-27 2004-04-27 Denso Corporation Flat rotary electric machine
US6759779B2 (en) * 2002-01-24 2004-07-06 Visteon Global Technologies, Inc. Automotive alternator stator assembly with rectangular continuous wire
US7015616B2 (en) * 2002-04-01 2006-03-21 Honeywell International, Inc. System and method for providing coil retention in the rotor windings of a high speed generator
US7004730B1 (en) * 2003-04-21 2006-02-28 Rowan Electric, Inc. Integral shaft for use in mud pumps
US7687959B1 (en) * 2007-12-17 2010-03-30 Lee S Peter Brushless a-c motor

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Publication number Publication date
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