USRE38939E1 - Interlocking segmented coil array - Google Patents
Interlocking segmented coil array Download PDFInfo
- Publication number
- USRE38939E1 USRE38939E1 US09/561,826 US56182600A USRE38939E US RE38939 E1 USRE38939 E1 US RE38939E1 US 56182600 A US56182600 A US 56182600A US RE38939 E USRE38939 E US RE38939E
- Authority
- US
- United States
- Prior art keywords
- coil
- coils
- radially extending
- side portions
- coil array
- 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.)
- Expired - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims abstract description 32
- 230000004907 flux Effects 0.000 claims abstract description 16
- 238000003491 array Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 claims 4
- 239000004593 Epoxy Substances 0.000 claims 3
- 238000003754 machining Methods 0.000 claims 1
- 239000011800 void material Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 235000012771 pancakes Nutrition 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- 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
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
Definitions
- This present invention relates generally to electrical generator or motor structures and more specifically to brushless electromotive devices of the type which employ a flat coil array or structure operating within an axially-oriented magnetic field having flux lines mostly perpendicular to the working conductor portion of the coils.
- This may include disc or pancake rotary motors as well as linear motors having such flat coils and magnetic structure.
- Motors employing disc-shaped coil armatures and brush commutation have been in use since the late 1950's.
- Brushless disc-type motors were later developed, employing rotating magnets, coil stators and electronic commutation.
- Such motors have been used in large numbers in audio and video tape recorders and computer disc drives.
- a magnetic rotor disc with alternating North/South pole pieces rotates above and/or below a plane containing several flat, stator coils lying adjacent one another.
- Current flowing in the conductor wires of the coils interacts with the alternating magnetic flux lines of the disc, producing Lorentz forces perpendicular to the radially directed conductors and thus tangential to the axis of rotation.
- the invention relates to the construction and shape of the individual coils making up a coil array (circular or arc-shaped arrangement of coils) so as to allow interlocking or overlapping of multiple coils to form a thin disc coil array having double the density of, but not significantly more thickness than, non-overlapping coil arrays.
- the radially extending conductor portions of each coil all lie in a first plane while the circumferentially extending portions of each coil's conductors lie above and below said first plane.
- Another object of the present invention is to maximize the total length of the working conductors within a circular coil array by overlapping three adjacent coils, so as to maximize the electromotive interaction for a motor or generator of a given diameter. For any given device diameter, conductor cross-sectional area, and magnetic flux density, this technique maximizes the torque which may be produced by a motor, or the voltage produced by a generator.
- Another object of the invention is to provide a mechanism whereby multiple coil arrays may be closely stacked with corresponding magnetic rotors in alternating layers so as to increase the total coil area within a motor or generator of a given diameter. This increased coil area allows increased interaction between coils and magnets, improving the power conversion with the motor or generator.
- FIG. 1a is an illustration of a prior art (planer) coil assembly
- FIG. 1b is an illustration of a prior art magnet rotor associated with the coil assembly of FIG. 1a ;
- FIG. 2 is an illustration of another prior art (partially overlapping) coil assembly
- FIG. 3 is an illustration of a single wire-wound coil according to this invention.
- FIG. 4 is an illustration of three coils of FIG. 3 , overlapped in their proper orientation according to this invention.
- FIG. 5 is an illustration of a Segmented Coil Array (“SCA”) coil platter, with a partial cutaway showing the multiple internal coils of FIG. 3 , according to this invention
- FIG. 6 is an enlarged cross-sectional illustration of the SCA plater of FIG. 5 ;
- FIG. 7 is an illustration of three coils of an alternative embodiment of the present invention, overlapped in their proper orientation according to this invention.
- FIG. 8 is an illustration an alternate form of coil having lower resistive losses
- FIG. 9 illustrates a basic electromotive device showing three nested coils in their proper orientation to two adjacent magnet rotors.
- FIG. 10 is an illustration of three coaxially stacked SCA coil platters of FIG. 5 suitable for use in an electromotive device.
- FIG. 1 there is shown a prior art planer coil assembly 10 and a magnet rotor 11 which may be used to make a typical prior art disc-type motor.
- This coil assembly 10 consists of several individual coils 13 , 13 ′, 13 ′′ arranged in a circular pattern, each coil 13 having two radially extending conductor portions or legs 14 , 14 ′, an inner circumferentially extending leg 15 and an outer circumferentially extending leg 16 , all lying in a single plane.
- the magnet rotor 11 In a motor utilizing such a coil assembly, the magnet rotor 11 , having alternating North/South poles 18 , 19 arranged in a corresponding circular pattern and affixed to a central shaft (not shown), rotates in a plane closely adjacent to, but spaced slightly above and/or below, the plane containing the coils 13 , 13 ′, 13 ′′. While two magnet rotors 11 may be used, one on either side of the coil assembly 10 , only one may be used if a magnetic flux return, such as a soft iron disc (not shown), is placed on the other side of the coil assembly opposite the rotor.
- a magnetic flux return such as a soft iron disc (not shown)
- FIG. 2 shows a somewhat different prior art coil assembly 20 in which the working conductor legs 22 , 22 ′ of the wire-wound coil 23 overlap the adjacent coils 21 , 25 . Likewise, the radial legs 24 , 26 of coil 25 overlap adjacent coils 23 , 27 . While this overlapping arrangement allows denser packing of the working conductors 22 , 24 , 26 , it also requires that the spacing or gap between the rotor's magnets and flux return be twice as wide as would be required for a single thickness of the coil shown in FIG. 1 .
- FIG. 3 illustrates one individual coil 30 constructed according to the present invention.
- the coil 30 comprises round or flat conductor wire spirally wound in a keystone or trapezoidal shape defining a central open space 33 .
- the open space 33 is bounded by two radially extending side portions or working legs 37 lying in a first plane, an outer circumferentially extending base portion 35 and an inner circumferentially extending base portion 39 lying in a second plane, parallel to but spaced apart from and above the first plane.
- the open space 33 must be wide enough to accommodate two adjacent working legs 37 .
- the electrically conducting coil leads 34 , 36 extending from the outer circumference of the coil provide a means for applying an electrical current through the coil from an external source (not shown).
- each end of the radially extending legs 37 are offsetting bends 31 and 32 that provide the transition from the second plane to the first plane. These offsetting bends 31 and 32 are an important feature of the present invention and are required for the desired high density packing arrangement presented in FIG. 4 below.
- the length l of this working portion 38 is called the working length.
- the working length l of the individual coils are optimized for maximum torque or voltage production by ensuring that such working length l is about 42% of the distance from the center of the coil platter to the outer point of the coil working length, which distance is called the critical radius of the platter.
- FIG. 4 shows three typical coils 42 , 44 , 46 which would be arranged with 45 others in the same manner to form an assembly of 48 coils for this particular diameter array.
- the coils are arranged such that the working portions 38 of each coil are all in the same first plane and the central open space 33 of one coil 44 (between its working legs 37 ) is filled by one working leg 37 ′ from each of the adjacent coils 42 , 46 .
- the rest of the coil 44 (mostly the inner 39 and outer 35 circumferentially extending portions) cannot reside in the same first plane because it would require parts of different coils to pass through the same space. This is the reason the offsetting bends 31 and 32 are important, so that the ends will lie in a second (and third) plane whereby the coils may be nested to achieve a high density.
- a complete array of coils, affixed to each other and/or to a suitable structural material to form a coil platter (or an arc-shaped portion of the total coil platter) may be referred to as a Segmented Coil Array (“SCA”).
- SCA Segmented Coil Array
- a complete coil platter 50 is depicted in FIG. 5 . (This particular illustration does not show the coil leads 34 , 36 for clarity).
- This SCA platter 50 is composed of 48 individual coils 30 molded into an epoxy resin or other easily moldable material for support, which optionally may be further strengthened by also molding in layers of fiber reinforcing fabric.
- each coil 30 Since the inner 39 and outer 35 ends of each coil 30 lie in planes slightly above and below a first plane containing the working legs 37 , the molded platter 50 has a thin center face 54 with a thicker inner rim 52 and outer Tim 56 . Any other even numbers of coils other than 48 may also be used in an SCA, depending on the electrical or mechanical properties desired.
- the working length of the individual coils may be optimized for maximum torque production, in a motor, or voltage production, in a generator. This is done by making the coil working length 42% of the critical radius.
- This critical radius 58 is indicated in FIG. 5 and is defined as the distance from the center of the coil platter to the outermost points of the working length, before reaching the outer rim 56 .
- FIG. 6 A cross section of a portion of the coil platter 50 of FIG. 5 is illustrated in FIG. 6 .
- the exterior surface of the center face 54 is coated with one or two layers of PFTE 62 , 64 to provide abrasion resistance and low friction characteristics.
- one or two pieces of thin fiberglass cloth 63 , 65 may be added over the coils, under PFTE, to further increase strength and stiffness of the platter.
- FIG. 7 illustrates three coils of an alternative coil configuration 90 .
- An SCA formed with alternative coil configuration 90 is comprised of a first and a second multiplicity of coils of equal number.
- the coils of the first multiplicity of coils e.g. coils 91 , 93
- the coils of the second multiplicity of coils are formed such that the working legs 37 of each coil lie in a first plane, and the outer circumferentially extending base portion 35 and inner circumferentially extending base portion 39 of each coil lie outside the first plane.
- offsetting bends 31 and 32 near each end of the radially extending legs 37 of the coils of the second multiplicity of coils provide the transition of the base portions 35 and 39 from the first plane to outside the first plane.
- FIG. 7 depicts the angles of the offsetting bends 31 and 32 as being approximately 90 degrees in this alternative coil configuration 90 , but any angle of the offsetting bends 31 and 32 sufficient to allow the first and second multiplicity of coils to nest as depicted such that the working legs 37 of all coils of both the first and second multiplicity of coils lie substantially in a single plane is acceptable.
- FIG. 8 illustrates yet another alternate coil configuration 70 useful with the present invention and having lower electrical losses than coil 30 above.
- the coil 70 comprises flat conductor wire or ribbon (i.e. having a rectangular cross-section) spirally wound to form a basic keystone or trapezoidal shape surrounding a central open space 73 , much like coil 30 above.
- the open space 73 is, like in coil 30 , bounded by two radially extending portions or working legs 77 lying in a first plane, an outer circumferentially extending base portion 75 and an inner circumferentially extending portion 79 lying in a second plane, parallel to but spaced apart from the first plane.
- the low-loss coil 70 is machined after winding so that there are abrupt offsetting steps 71 near each end of the radially extending legs 77 . Further, sufficient material is machined away from the radially extending legs 77 so that, at least over the working length 78 , the legs 77 have a smaller cross-sectional area than the base portions 75 , 79 .
- the electrical resistance in the larger base portions 75 , 79 of coil 70 will be less than in corresponding base portions 35 , 39 of coil 30 , when both have the same sized working legs, thereby reducing the I 2 R losses of coil 70 .
- the open space 73 must be wide enough to accommodate two adjacent working legs 77 to achieve the high density nesting shown in FIG. 4 . Coil leads would typically extend from the outer circumference of the coil, but are not shown here to improve clarity.
- a circular coil platter 50 is exposed to an axially directed magnetic flux produced by a magnet rotor 11 , i.e. flux perpendicular to the plane containing the coils' working lengths.
- a magnet rotor 11 which could be composed of permanent magnet segments or electromagnets and which would be affixed to a central rotatable shaft, not shown
- FIG. 9 illustrates a magnet rotor 11 (which could be composed of permanent magnet segments or electromagnets and which would be affixed to a central rotatable shaft, not shown) is positioned adjacent one or both sides of the coil platter to form a basic electromotive device 80 .
- some type of flux return such as a soft iron disc, should be placed adjacent the opposite side of the coil platter.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Disclosed is a Segmented Coil Array (“SCA”) for use in rotary electromotive devices, such as motors and generators, which employ multiple coils operating within an axial gap magnetic structure. Individual conductor coils have offset circumferentially extending portions so as to allow interlocking of adjacent coils radially extending portions to form a circular array in which all of the coils' working conductors, which are those in the axial magnetic field, can be oriented in the same plane. This construction allows minimum magnet gap spacing, thus, maximizing the available magnetic flux. The resulting SCA may easily be commuted as a three-phase motor, actuator, or generator. The invention also provides a structure whereby multiple coil arrays and associated magnetic rotors may be alternately stacked in layers so as to further increase the total coil working area within a motor or generator of a given diameter.
Description
This present invention relates generally to electrical generator or motor structures and more specifically to brushless electromotive devices of the type which employ a flat coil array or structure operating within an axially-oriented magnetic field having flux lines mostly perpendicular to the working conductor portion of the coils. This may include disc or pancake rotary motors as well as linear motors having such flat coils and magnetic structure.
Motors employing disc-shaped coil armatures and brush commutation have been in use since the late 1950's. Brushless disc-type motors were later developed, employing rotating magnets, coil stators and electronic commutation. Such motors have been used in large numbers in audio and video tape recorders and computer disc drives. In such a motor, a magnetic rotor disc with alternating North/South pole pieces rotates above and/or below a plane containing several flat, stator coils lying adjacent one another. Current flowing in the conductor wires of the coils interacts with the alternating magnetic flux lines of the disc, producing Lorentz forces perpendicular to the radially directed conductors and thus tangential to the axis of rotation. While current flows through the entire coil, only the radial extending portions of the conductors (called the working conductors) contribute torque to the rotor. See, for example, U.S. Pat. Nos. 3,988,024; 4,361,776; 4,371,801; and 5,146,144. A variation of this arrangement is known in which the circumferential portions (nonworking conductors) of the wire-wound coils overlap each other. See, for example, U.S. Pat. Nos. 4,068,143; 4,420,875; 4,551,645; and 4,743,813. While this arrangement allows closer packing of the working conductors, it also requires that the gap between the rotor's magnets and flux return be about twice as thick as would be required for a single thickness of a non-overlapping coil, thus reducing the magnetic flux density and thus reducing the motor's efficiency.
In view of the well known disadvantages in the above-mentioned prior art, it is an object of the present invention to provide a novel coil structure which more efficiently provides electromotive interaction between these new coils and the magnets within a rotary motor or generator of the type having a generally flat, ring-shaped coil structure and employing an axial gap magnet structure, such as in disc or pancake motors, while minimizing the thickness of the coil and magnet flux gap. Specifically, the invention relates to the construction and shape of the individual coils making up a coil array (circular or arc-shaped arrangement of coils) so as to allow interlocking or overlapping of multiple coils to form a thin disc coil array having double the density of, but not significantly more thickness than, non-overlapping coil arrays. The radially extending conductor portions of each coil all lie in a first plane while the circumferentially extending portions of each coil's conductors lie above and below said first plane.
Another object of the present invention is to maximize the total length of the working conductors within a circular coil array by overlapping three adjacent coils, so as to maximize the electromotive interaction for a motor or generator of a given diameter. For any given device diameter, conductor cross-sectional area, and magnetic flux density, this technique maximizes the torque which may be produced by a motor, or the voltage produced by a generator.
Another object of the invention is to provide a mechanism whereby multiple coil arrays may be closely stacked with corresponding magnetic rotors in alternating layers so as to increase the total coil area within a motor or generator of a given diameter. This increased coil area allows increased interaction between coils and magnets, improving the power conversion with the motor or generator.
While this specification concludes with claims particularly pointing out and distinctly claiming the subject matter which is now regarded as the invention, it is believed that the broader aspects of the invention, as well as several of the features and advantages thereof, may be better understood by reference to the following detailed description of presently preferred embodiments of the invention when taken in connection with the accompanying drawings in which:
Referring now to the drawings and particularly to FIG. 1 , there is shown a prior art planer coil assembly 10 and a magnet rotor 11 which may be used to make a typical prior art disc-type motor. This coil assembly 10 consists of several individual coils 13, 13′, 13″ arranged in a circular pattern, each coil 13 having two radially extending conductor portions or legs 14, 14′, an inner circumferentially extending leg 15 and an outer circumferentially extending leg 16, all lying in a single plane. In a motor utilizing such a coil assembly, the magnet rotor 11, having alternating North/ South poles 18, 19 arranged in a corresponding circular pattern and affixed to a central shaft (not shown), rotates in a plane closely adjacent to, but spaced slightly above and/or below, the plane containing the coils 13, 13′, 13″. While two magnet rotors 11 may be used, one on either side of the coil assembly 10, only one may be used if a magnetic flux return, such as a soft iron disc (not shown), is placed on the other side of the coil assembly opposite the rotor. In use, electrical current in the radially extending conductors 14,14′ of the coil assembly 10 interacts with the alternating magnetic flux lines from the north 18 and south 19 poles of the rotor, producing Lorentz forces perpendicular to the radial conductors 14,14′ and thus tangential to the rotor's 11 axis of rotation. While current flows through the entire coil 13, only the radial conductor legs 14, 14′ (called the working conductors) contribute torque to the rotor 11 while the non-working legs 15, 16 merely complete a current path.
As one example of a preferred embodiment, FIG. 4 shows three typical coils 42, 44, 46 which would be arranged with 45 others in the same manner to form an assembly of 48 coils for this particular diameter array. The coils are arranged such that the working portions 38 of each coil are all in the same first plane and the central open space 33 of one coil 44 (between its working legs 37) is filled by one working leg 37′ from each of the adjacent coils 42, 46. The rest of the coil 44 (mostly the inner 39 and outer 35 circumferentially extending portions) cannot reside in the same first plane because it would require parts of different coils to pass through the same space. This is the reason the offsetting bends 31 and 32 are important, so that the ends will lie in a second (and third) plane whereby the coils may be nested to achieve a high density.
A complete array of coils, affixed to each other and/or to a suitable structural material to form a coil platter (or an arc-shaped portion of the total coil platter) may be referred to as a Segmented Coil Array (“SCA”). A complete coil platter 50 is depicted in FIG. 5. (This particular illustration does not show the coil leads 34, 36 for clarity). This SCA platter 50 is composed of 48 individual coils 30 molded into an epoxy resin or other easily moldable material for support, which optionally may be further strengthened by also molding in layers of fiber reinforcing fabric. Since the inner 39 and outer 35 ends of each coil 30 lie in planes slightly above and below a first plane containing the working legs 37, the molded platter 50 has a thin center face 54 with a thicker inner rim 52 and outer Tim 56. Any other even numbers of coils other than 48 may also be used in an SCA, depending on the electrical or mechanical properties desired.
It has been discovered that for a given SCA diameter, the working length of the individual coils may be optimized for maximum torque production, in a motor, or voltage production, in a generator. This is done by making the coil working length 42% of the critical radius. This critical radius 58 is indicated in FIG. 5 and is defined as the distance from the center of the coil platter to the outermost points of the working length, before reaching the outer rim 56.
A cross section of a portion of the coil platter 50 of FIG. 5 is illustrated in FIG. 6. Preferably, the exterior surface of the center face 54 is coated with one or two layers of PFTE 62, 64 to provide abrasion resistance and low friction characteristics. Similarly, one or two pieces of thin fiberglass cloth 63, 65 may be added over the coils, under PFTE, to further increase strength and stiffness of the platter.
In operation within a typical electromotive device, a circular coil platter 50 is exposed to an axially directed magnetic flux produced by a magnet rotor 11, i.e. flux perpendicular to the plane containing the coils' working lengths. One such way of providing this flux is illustrated in FIG. 9 in which a magnet rotor 11 (which could be composed of permanent magnet segments or electromagnets and which would be affixed to a central rotatable shaft, not shown) is positioned adjacent one or both sides of the coil platter to form a basic electromotive device 80. If only one magnet 11 is used in a particular device, some type of flux return, such as a soft iron disc, should be placed adjacent the opposite side of the coil platter. Here, only three coils 42, 44, 46 of an entire platter 50 of 48 coils 30 are shown for clarity in this example. As the coils are appropriately energized (by any well known control circuit, not shown), a rotating force or torque is produced in the magnet rotor(s). Depending on the results desired and the corresponding mechanical arrangement, the magnet rotor may cause a shaft to revolve at high speed or merely turn a small angle at high torque.
As illustrated in FIG. 10 , it is beneficial to stack multiple coil platters 50, 50′, 50″ along a common central axis with alternating layers of magnetic rotors 11. This arrangement increases the total working area, and thus the power, within an electromotive device of given diameter. For clarity, the coil leads and magnet rotors are again not shown in FIG. 10. The details of various possible mechanical arrangements to adapt the present invention to common industrial devices are so well known that they need not be discussed here.
While the present invention has been described in terms more or less specific to preferred embodiments, it is expected that various alterations, modifications, or permutations thereof will be readily apparent to those skilled in the art. For example, the invention may be embodied in an electrical generator as well as a motor. Instead of a circular coil array, the coils of the invention may be formed into a linear array or a partial circle rather than a complete circular array. Therefore, it should be understood that the invention is not to be limited to the specific features shown or described, but it is intended that all equivalents be embraced within the spirit and scope of the invention as defined by the appended claims.
Claims (30)
1. A segmented coil array for use in rotary electromotive devices with one or two magnet rotors, such as motors and generators, of the type which employ an axial gap magnetic structure, composed of an even multiple of individual wire-wound coils, each coil having substantially the same structure and size and comprising circumferentially extending base portions and radially extending side portions, the radially extending side portions and circumferentially extending base portions joined at their respective ends to define a generally trapezoidal shape: the coil array formed into a ring of partially overlapped alternating coils such that the radially extending side portions of each coil are coplanar.
2. The coil array of claim 1 wherein each individual coil has offsetting bends near each end of said radially extending side portions which cause the circumferentially extending base portions of the coil to lie outside the plane containing the radially extending side portions so as to allow partial overlapping of each coil by its two adjacent coils.
3. A segmented coil array, according to claim 2 , in which each coil's circumferentially extending base portions and radially extending side portions define a space containing one radially extending portion from each of its two adjacent coils thereby doubling the density of the coil's working conductors.
4. The coil array of claim 1 wherein a plurality of the individual coils have offsetting bends near each end of said radially extending side portions which cause the circumferentially extending base portions of the coil to lie outside the plane containing the radially extending side portions so as to allow partial overlapping of each coil by at least two adjacent coils.
5. A segmented coil array, according to claim 1 , in which the individual coils are over-molded with a moldable material to form a ring of suitable structural integrity and heat tolerance.
6. The segmented coil array of claim 5 in which the moldable material is epoxy.
7. The segmented coil array of claim 5 additionally comprising layers of fiber reinforcing fabric.
8. A segmented coil array, according to claim 1 , herein the coils are oriented to form a linear array.
9. A segmented coil array, according to claim 1 , wherein the coils are oriented to form a partial ring.
10. The coil array of claim 1 A segmented coil array for use in rotary electromotive devices with one or two magnet rotors, such as motors and generators, of the type which employ an axial gap magnetic structure, composed of an even multiple of individual wire-wound coils, each coil having substantially the same structure and size and comprising circumferentially extending base portions and radially extending side portions, the radially extending side portions and circumferentially extending base portions joined at their respective ends to define a generally trapezoidal shape: the coil array formed into a ring of partially overlapped alternating coils such that the radially extending side portions of each coil are coplanar, wherein the individual coils are formed such that the radially extending side portions of a coil have a smaller cross-sectional electrical conductor area than at least one of the circumferentially extending base portions.
11. The coil array of claim 1 , wherein the multiple individual wire-wound coils A rotary electromotive device comprising two rotors, at least one of which comprises a magnet rotor, said two rotors sandwiching therebetween a segmented coil array to provide two axial magnetic gaps, said segmented coil array being composed of an even multiple of individual wire-wound coils, each coil having substantially the same structure and size and comprising circumferentially extending base portions and radially extending side portions, the radially extending side portions and circumferentially extending base portions joined at their respective ends to define a generally trapezoidal shape, the coil array being formed into a ring of partially overlapping alternating coils such that the radially extending side portions of each coil are coplanar, said coils being affixed to each other to form a coil platter, having a central axis and known inner and outer diameters, in which the radially extending coil portions are the working conductors, and the working length of said conductors is being approximately 42% of the distance between the central axis of the coil platter and the outer diameter of the coil's working length, thereby optimizing the array for maximum torque, when used as a motor, or voltage production, when used in a generator.
12. The coil array of claim 1 , wherein the coil array is operably located in a rotary electromotive device, such as a motor or generator, the motor or generator having alternating layers of magnetic material to produce an axial gap magnetic structure, and further having several additional coil arrays arranged in layers of electromagnetic coil arrays which are stacked so as to further increase the total coil area within said electromotive device, each layer of coil structure operating in a separate axial magnetic flux gap formed by the layers of magnetic material.
13. The device of claim 12 wherein said magnetic material is a disc shaped permanent magnet rotor affixed to a rotatable shaft.
14. The device of claim 12 wherein said magnetic material is a disc shaped electromagnet rotor affixed to a rotatable shaft.
15. A segmented coil array for use in rotary electromotive devices, such as motors and generators, of the type which employ an axial gap magnetic structure, comprising an even multiple of identically shaped individual wire-wound coils, each coil comprising circumferentially extending base portions, and radially extending side portions joined at their respective ends to form a trapezoid shape, each side portion having offsetting bends at each end of said side portion adjacent to each base portion so that said base portions lie in a plane parallel to said side portions; the coil array formed by arranging a first set of coils into a ring with side portions being adjacent, and overlapping a second set of coils such that the radially extending side portions of each set of coils are all coplanar and the offsetting bends of alternate coils are oriented in different directions so that the base portion of the first set of coils are parallel to the base portions of the second set of coils.
16. A segmented coil array, according to claim 15 , in which the individual coils are over-molded with a moldable material to form a ring of suitable structural integrity and heat tolerance.
17. The segmented coil array of claim 16 in which the moldable material is epoxy.
18. The segmented coil array of claim 15 additionally comprising layers of fiber reinforcing fabric.
19. The coil array of claim 15 A segmented coil array for use in rotary electromotive devices, such as motors and generators, of the type which employ an axial gap magnetic structure, comprising an even multiple of identically shaped individual wire-wound coils, each coil comprising circumferentially extending base portions, and radially extending side portions joined at their respective ends to form a trapezoid shape, each side portion having offsetting bends at each end of said side portion adjacent to each base portion so that said base portions lie in a plane parallel to said side portions; the coil array formed by arranging a first set of coils into a ring with side portions being adjacent, and overlapping a second set of coils such that the radially extending side portions of each set of coils are all coplanar and the offsetting bends of alternate coils are oriented in different directions so that the base portions of the first set of coils are parallel to the base portions of the second set of coils, wherein the individual coils are formed such that the radially extending side portions of a coil have a smaller cross-sectional electrical conductor area than at least one of the circumferentially extending base portions.
20. The coil array of claim 15 , wherein the multiple A segmented coil array for use in rotary electromotive devices, such as motors and generators, of the type which employ an axial gap magnetic structure, comprising an even multiple of identically shaped individual wire-wound coils, each coil comprising circumferentially extending base portions, and radially extending side portions joined at their respective ends to form a trapezoid shape, each side portion having offsetting bends at each end of said side portion adjacent to each base portion so that said base portions lie in a plane parallel to said side portions; the coil array being formed by arranging a first set of coils into a ring with side portions being adjacent, and overlapping a second set of coils such that the radially extending side portions of each set of coils are all coplanar and the offsetting bends of alternate coils are oriented in different directions so that the base portions of the first set of coils are parallel to the base portions of the second set of coils and slightly above and below the co-planar radially extending side portions, the individual wire-wound coils being affixed to each other to form a coil platter, having a central axis and known inner and outer diameters, in which the radially extending side portions include a working length, and the working length is approximately 42% of the distance between the central axis of the coil platter and the outer diameter of the coil's working length, thereby optimizing the array for maximum torque, when used in a motor, or voltage production, when used in a generator.
21. In a method of manufacturing a stator for an axial gap electrical machine, the steps comprising
spiral winding a flat ribbon conductor into a plurality of coils having radially extending sides and circumferential ends in substantially the same structure and size around a central void;
forming at least one portion of the plurality of spiral wound coils to offset their circumferential ends from their radially extending sides by machining the radially extending sides of said at least one portion of coils to provide said offset of their circumferential ends; and
arranging the coils into a circumferentially extending stator with their radially extending sides lying generally coplanar by overlapping said at least one portion of coils in the arrangement with their radially extending side portions lying in the central voids of the remaining portion of the unformed coils and with their offset circumferential ends overlapping the circumferential ends of the remaining portion of the unformed coils.
22. A segmented coil array for use in rotary electromotive devices of the type which employ an axial gap magnetic structure, composed of a plurality of individually wound coils comprised of flat ribbon conductor, each coil comprising circumferentially extending base portions and radially extending side portions, the radially extending side portions and circumferentially extending base portions being joined at their respective ends to define a generally trapezoidal shape; a portion of individually wound coils being machined to offset their circumferentially extending base portions from their radially extending side portions, the coil array being formed into a ring of partially overlapped alternating coils such that the radially extending side portions of each coil are coplanar.
23. The coil array of claim 22 , wherein the individual coils are formed such that the circumferentially extending base portions of a coil have a larger cross-sectional area than one of the radially extending side portions.
24. The coil array of claim 22 wherein at least one circumferentially extending base portion has less electrical resistance than the radially extending side portions.
25. The coil array of claim 22 wherein each individual coil has offsets near each end of said radially extending side portions which cause the circumferentially extending base portions of the coil to lie outside the plane containing the radially extending side portions so as to allow partial overlapping of each coil by its two adjacent coils.
26. A coil array, according to claim 25 , in which each coil's circumferentially extending base portions and radially extending side portions define a space containing one radially extending portion from each of its two adjacent coils thereby doubling the density of the coil's working conductors.
27. A coil array, according to claim 22 , in which the individual coils are over-molded with a moldable material to form a coil platter with structural integrity and heat tolerance.
28. The coil array of claim 27 in which the moldable material is epoxy.
29. The coil array of claim 27 comprising at least one layer of fiber reinforcing fabric incorporated in the coil platter.
30. The coil array of claim 22 , wherein the multiple individual wound coils are affixed to each other form a coil platter, having a central axis and known inner and outer diameters, in which the radially extending coil portions are the working conductors, and the working length of said conductors is approximately 42% of the distance between the central axis of the coil platter and the outer diameter of the coil's working length.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/561,826 USRE38939E1 (en) | 1996-05-21 | 2000-04-28 | Interlocking segmented coil array |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/651,973 US5744896A (en) | 1996-05-21 | 1996-05-21 | Interlocking segmented coil array |
US09/561,826 USRE38939E1 (en) | 1996-05-21 | 2000-04-28 | Interlocking segmented coil array |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/651,973 Reissue US5744896A (en) | 1996-05-21 | 1996-05-21 | Interlocking segmented coil array |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE38939E1 true USRE38939E1 (en) | 2006-01-24 |
Family
ID=24615009
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/651,973 Ceased US5744896A (en) | 1996-05-21 | 1996-05-21 | Interlocking segmented coil array |
US09/561,826 Expired - Lifetime USRE38939E1 (en) | 1996-05-21 | 2000-04-28 | Interlocking segmented coil array |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/651,973 Ceased US5744896A (en) | 1996-05-21 | 1996-05-21 | Interlocking segmented coil array |
Country Status (10)
Country | Link |
---|---|
US (2) | US5744896A (en) |
EP (1) | EP0903001A4 (en) |
JP (1) | JP2000511399A (en) |
KR (1) | KR100421726B1 (en) |
CN (1) | CN1093697C (en) |
AU (1) | AU3232797A (en) |
BR (1) | BR9709328A (en) |
CA (1) | CA2255958C (en) |
RU (1) | RU2226312C2 (en) |
WO (1) | WO1997044880A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040002677A1 (en) * | 2001-12-11 | 2004-01-01 | Gentsler Curtis C. | Alternate site gene therapy |
US20060145558A1 (en) * | 2004-05-28 | 2006-07-06 | Toshiaki Kashihara | Alternator for a vehicle |
US20060284513A1 (en) * | 2005-06-20 | 2006-12-21 | Purvines Stephen H | Electric motor stator |
US20070103025A1 (en) * | 2005-10-25 | 2007-05-10 | Maxon Motor Ag | Electric motor with multilayered rhombic single coils made of wire |
US20100253173A1 (en) * | 2007-09-14 | 2010-10-07 | Koji Miyata | Axial gap type coreless rotating machine |
US20110027084A1 (en) * | 2009-07-31 | 2011-02-03 | Andrew Rekret | Novel turbine and blades |
US20120001502A1 (en) * | 2010-07-01 | 2012-01-05 | Yee-Chun Lee | Multi-unit Modular Stackable Switched Reluctance Motor System with Parallely Excited Low Reluctance Circumferential Magnetic Flux loops for High Torque Density Generation |
US20130062889A1 (en) * | 2010-03-23 | 2013-03-14 | Adaptive Generators As | Variable electrical generator |
US20130093280A1 (en) * | 2011-10-17 | 2013-04-18 | GM Global Technology Operations LLC | Multi-filar bar conductors for electric machines |
US20130093281A1 (en) * | 2011-10-17 | 2013-04-18 | Gb Global Technology Operations Llc | Bar conductor shapes for electric machines |
Families Citing this family (137)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5744896A (en) * | 1996-05-21 | 1998-04-28 | Visual Computing Systems Corp. | Interlocking segmented coil array |
US6281614B1 (en) * | 1997-08-01 | 2001-08-28 | Wolfgang Hill | Multiple phase electric machine with a space-optimized turn-to-turn winding |
US6208056B1 (en) * | 1997-09-08 | 2001-03-27 | Active Power, Inc. | Cartridge armatures for electro-dynamic machines |
US6140734A (en) * | 1998-04-03 | 2000-10-31 | Nikon Corporation Of Japan | Armature with regular windings and having a high conductor density |
GB2336250B (en) * | 1998-04-09 | 2003-03-12 | John Richard Padley | Radial magnetic field electricity generator |
US6118202A (en) | 1998-05-11 | 2000-09-12 | Active Power, Inc. | High-efficiency inductor-alternator |
US5982069A (en) * | 1998-06-30 | 1999-11-09 | Rao; Dantam K. | Axial gap machine phase coil having tapered conductors with increasing width in radial direction |
US6046518A (en) * | 1999-01-21 | 2000-04-04 | Williams; Malcolm R. | Axial gap electrical machine |
US6885678B2 (en) * | 1999-04-14 | 2005-04-26 | Verizon Services Corp. | Telecommunications network |
CA2407655A1 (en) * | 2000-04-12 | 2001-10-25 | Jore Corporation | Power work tools having a slim profile |
DE60138221D1 (en) * | 2000-12-11 | 2009-05-14 | Koninkl Philips Electronics Nv | REEL |
US6570273B2 (en) * | 2001-01-08 | 2003-05-27 | Nikon Corporation | Electric linear motor |
JP2002247823A (en) * | 2001-02-15 | 2002-08-30 | Sankyo Seiki Mfg Co Ltd | Magnetic levitation type motor |
US6930433B2 (en) * | 2003-04-16 | 2005-08-16 | Apex Drives Laboratories, Inc. | Brushless electro-mechanical device |
US7863784B2 (en) * | 2005-08-15 | 2011-01-04 | Apex Drive Laboratories, Inc | Axial flux permanent magnet machines |
US6552460B2 (en) * | 2001-03-08 | 2003-04-22 | Motile, Inc. | Brushless electro-mechanical machine |
ATE525788T1 (en) | 2001-05-24 | 2011-10-15 | Arjuna Indraeswaran Rajasingham | ELECTRIC MACHINE WITH AXIAL AIR GAP |
US7839047B2 (en) * | 2001-05-24 | 2010-11-23 | Arjuna Indraeswaran Rajasingham | Axial gap electrical machine |
US7098566B2 (en) * | 2001-05-24 | 2006-08-29 | Rajasingham Arjuna Indraes War | Axial gap electrical machine |
KR100432244B1 (en) * | 2001-06-25 | 2004-05-22 | 삼익Lms주식회사 | Iron core type linear motor for high thrust force |
US6965514B2 (en) | 2002-01-16 | 2005-11-15 | Rockwell Automation Technologies, Inc. | Fluid cooled vehicle drive module |
US6909607B2 (en) * | 2002-01-16 | 2005-06-21 | Rockwell Automation Technologies, Inc. | Thermally matched fluid cooled power converter |
US6972957B2 (en) * | 2002-01-16 | 2005-12-06 | Rockwell Automation Technologies, Inc. | Modular power converter having fluid cooled support |
US7032695B2 (en) * | 2002-01-16 | 2006-04-25 | Rockwell Automation Technologies, Inc. | Vehicle drive module having improved terminal design |
US7177153B2 (en) | 2002-01-16 | 2007-02-13 | Rockwell Automation Technologies, Inc. | Vehicle drive module having improved cooling configuration |
US6982873B2 (en) * | 2002-01-16 | 2006-01-03 | Rockwell Automation Technologies, Inc. | Compact vehicle drive module having improved thermal control |
US7187568B2 (en) * | 2002-01-16 | 2007-03-06 | Rockwell Automation Technologies, Inc. | Power converter having improved terminal structure |
US6898072B2 (en) * | 2002-01-16 | 2005-05-24 | Rockwell Automation Technologies, Inc. | Cooled electrical terminal assembly and device incorporating same |
US6865080B2 (en) * | 2002-01-16 | 2005-03-08 | Rockwell Automation Technologies, Inc. | Compact fluid cooled power converter supporting multiple circuit boards |
US7187548B2 (en) * | 2002-01-16 | 2007-03-06 | Rockwell Automation Technologies, Inc. | Power converter having improved fluid cooling |
US7061775B2 (en) * | 2002-01-16 | 2006-06-13 | Rockwell Automation Technologies, Inc. | Power converter having improved EMI shielding |
US7142434B2 (en) | 2002-01-16 | 2006-11-28 | Rockwell Automation Technologies, Inc. | Vehicle drive module having improved EMI shielding |
US6787961B2 (en) * | 2002-12-19 | 2004-09-07 | Visteon Global Technologies, Inc. | Automotive alternator stator assembly with varying end loop height between layers |
US6882077B2 (en) * | 2002-12-19 | 2005-04-19 | Visteon Global Technologies, Inc. | Stator winding having cascaded end loops |
US6894418B2 (en) * | 2002-07-30 | 2005-05-17 | Comprehensive Power, Inc. | Nested stator coils for permanent magnet machines |
US6759781B1 (en) * | 2003-02-14 | 2004-07-06 | American Superconductor Corporation | Rotor assembly |
US6768239B1 (en) | 2003-06-23 | 2004-07-27 | Magnetic Power-Motion, Llc | Electromotive devices using notched ribbon windings |
US7084548B1 (en) | 2003-07-11 | 2006-08-01 | Gabrys Christopher W | Low cost high speed electrical machine |
US7332837B2 (en) * | 2003-08-11 | 2008-02-19 | General Motors Corporation | Cooling and handling of reaction torque for an axial flux motor |
US7262536B2 (en) * | 2003-08-11 | 2007-08-28 | General Motors Corporation | Gearless wheel motor drive system |
US20050035678A1 (en) * | 2003-08-11 | 2005-02-17 | Ward Terence G. | Axial flux motor mass reduction with improved cooling |
JP4532864B2 (en) * | 2003-09-01 | 2010-08-25 | 住友重機械工業株式会社 | 3-phase linear motor |
JP4582448B2 (en) * | 2003-12-02 | 2010-11-17 | 日立金属株式会社 | θ-Y-X stage |
US6966198B2 (en) * | 2003-12-12 | 2005-11-22 | Visteon Global Technologies, Inc. | Air-cycle air conditioning system for commercial refrigeration |
US7081696B2 (en) | 2004-08-12 | 2006-07-25 | Exro Technologies Inc. | Polyphasic multi-coil generator |
US20060038461A1 (en) * | 2004-08-19 | 2006-02-23 | Gabrys Christopher W | Optimized air core armature |
US7411325B1 (en) | 2004-10-20 | 2008-08-12 | Revolution Electric Motor Company, Inc. | High efficiency combination motor and drive |
US7508157B1 (en) | 2005-01-18 | 2009-03-24 | Gabrys Christopher W | Line synchronous air core motor |
US8186975B2 (en) * | 2005-08-24 | 2012-05-29 | Metropolitan Industries, Inc. | Low profile pump with first and second rotor arrangement |
US7608965B2 (en) * | 2005-09-01 | 2009-10-27 | Wisconsin Alumni Research Foundation | Field controlled axial flux permanent magnet electrical machine |
JP4616145B2 (en) * | 2005-10-11 | 2011-01-19 | 本田技研工業株式会社 | motor |
US7750515B1 (en) | 2005-10-25 | 2010-07-06 | Gabrys Christopher W | Industrial air core motor-generator |
US7619345B2 (en) * | 2006-01-30 | 2009-11-17 | American Superconductor Corporation | Stator coil assembly |
US7471026B2 (en) * | 2006-03-13 | 2008-12-30 | Isca Innovatons, Llc | Brushless electric motor |
US7902700B1 (en) | 2006-04-03 | 2011-03-08 | Gabrys Christopher W | Low harmonic loss brushless motor |
AU2007257187A1 (en) | 2006-06-08 | 2007-12-13 | Exro Technologies Inc. | Poly-phasic multi-coil generator |
US20070284939A1 (en) * | 2006-06-12 | 2007-12-13 | Honeywell International | Aircraft electric brake and generator therefor |
US7719147B2 (en) | 2006-07-26 | 2010-05-18 | Millennial Research Corporation | Electric motor |
US20080061948A1 (en) * | 2006-08-18 | 2008-03-13 | Daniel Perez | System and method for communicating with gate operators via a power line |
JP4699961B2 (en) * | 2006-08-30 | 2011-06-15 | 本田技研工業株式会社 | Rotating electrical machine coil and manufacturing method thereof, and rotating electrical machine and manufacturing method thereof |
GB0617989D0 (en) * | 2006-09-13 | 2006-10-18 | Denne Phillip R M | Improvements in electrical machines |
US20080094186A1 (en) * | 2006-10-04 | 2008-04-24 | Viking Access Systems, Llc | Apparatus and method for monitoring and controlling gate operators via power line communication |
US20080106370A1 (en) * | 2006-11-02 | 2008-05-08 | Viking Access Systems, Llc | System and method for speech-recognition facilitated communication to monitor and control access to premises |
JP5362188B2 (en) * | 2007-03-29 | 2013-12-11 | キヤノン電子株式会社 | Magnetic detection sensor |
US8823238B2 (en) * | 2007-04-03 | 2014-09-02 | Hybridauto Pty Ltd | Winding arrangement for an electrical machine |
US7646132B2 (en) * | 2007-05-02 | 2010-01-12 | Empire Magnetics Inc. | Arcuate coil winding and assembly for axial gap electro-dynamo machines (EDM) |
US7841164B2 (en) * | 2007-09-19 | 2010-11-30 | Honeywell International Inc. | Direct metering fuel system with an integral redundant motor pump |
US20090085719A1 (en) * | 2007-09-28 | 2009-04-02 | Daniel Perez | System and method for monitoring and controlling a movable barrier operator utilizing satellite communication capabilities |
US7573173B1 (en) * | 2007-09-28 | 2009-08-11 | Aximet Technology, Inc. | Apparatus for axial magnetic field electric motor |
EP2266194A2 (en) | 2007-11-07 | 2010-12-29 | Frank Pommerening | Electric motor or generator of the disc type |
US8129880B2 (en) * | 2007-11-15 | 2012-03-06 | GM Global Technology Operations LLC | Concentrated winding machine with magnetic slot wedges |
US20090188166A1 (en) * | 2008-01-24 | 2009-07-30 | Hassan Taheri | System for gearless operation of a movable barrier utilizing lorentz forces |
US7816875B2 (en) * | 2008-01-24 | 2010-10-19 | Viking Access Systems, Llc | High torque gearless actuation at low speeds for swing gate, roll-up gate, slide gate, and vehicular barrier operators |
US20090200889A1 (en) * | 2008-02-08 | 2009-08-13 | Empire Magnetics Inc. | Nested Serpentine Winding for an Axial Gap Electric Dynamo Machine |
WO2009100436A2 (en) * | 2008-02-10 | 2009-08-13 | Empire Magnetics Inc. | Winding for an axial gap electro dynamo machine |
US7821168B2 (en) * | 2008-02-10 | 2010-10-26 | Empire Magnetics Inc. | Axial gap dynamo electric machine with magnetic bearing |
US8384263B2 (en) * | 2008-02-14 | 2013-02-26 | Hitachi, Ltd. | Rotating electrical machine having a compact stator |
US7816879B2 (en) * | 2008-02-19 | 2010-10-19 | Viking Access Systems, Llc | High torque movable barrier actuation at low speeds utilizing a hub motor |
US20090211160A1 (en) * | 2008-02-26 | 2009-08-27 | Ali Tehranchi | Access device with a photovoltaic housing utilized to generate power |
FR2930690A1 (en) * | 2008-04-29 | 2009-10-30 | Julien Gillonnier | Ironless spiral coil integrated electrical machine e.g. rotary type electrical machine, for bicycle, has movable parts or fixed part coupled to actuator when machine serves as generator to produce alternating current at terminals |
US10038349B2 (en) | 2008-08-15 | 2018-07-31 | Millennial Research Corporation | Multi-phase modular coil element for electric motor and generator |
BRPI0916951A2 (en) * | 2008-08-15 | 2019-09-24 | Millennial Res Corporation | electric motor |
DK2166644T3 (en) * | 2008-09-18 | 2019-05-06 | Siemens Ag | Group of three stator windings for a stator of an electric machine, stator device, generator and wind turbine |
FR2937093B1 (en) * | 2008-10-10 | 2013-10-11 | Vincent Genissieux | DEFORMABLE LODGE ROTATING MACHINE WITH ELECTROMAGNETIC DEVICE |
NO20084775A (en) | 2008-11-12 | 2010-05-10 | Smart Motor As | Device by an electric machine and a method for manufacturing stator sections for such machines |
EP2213533B1 (en) * | 2009-01-28 | 2012-03-14 | Alenia Aeronautica S.p.A. | Braking system for the undercarriage of an aircraft |
EP2213538A1 (en) * | 2009-01-28 | 2010-08-04 | Alenia Aeronautica S.p.A. | Braking system for the undercarriage of an aircraft |
EP2226923B1 (en) * | 2009-03-03 | 2015-06-10 | GE Energy Power Conversion Technology Limited | Coils |
JP2010252408A (en) * | 2009-04-10 | 2010-11-04 | Masaaki Iwatani | Coil component |
US20100289616A1 (en) * | 2009-05-18 | 2010-11-18 | Ali Tehranchi | Movable barrier system adapted to utilize biometric technology to identify and authorize access to premises |
US9337695B2 (en) * | 2010-02-22 | 2016-05-10 | GE Energy Conversion Technology LTD. | Single-layer coil with one bent endwinding and one straight endwinding |
KR101001030B1 (en) * | 2010-06-04 | 2010-12-15 | (주)설텍 | Permanet magnet generator of out rotor type and method for manufacturing permanet magnet generator of out rotor type |
US20120067676A1 (en) * | 2010-09-17 | 2012-03-22 | Brammo, Inc. | Vehicle wheel braking system |
EP2466731B1 (en) * | 2010-12-15 | 2013-06-12 | Infranor Holding S.A. | Synchronous motor with permanent magnets |
CN102097906B (en) * | 2011-01-11 | 2012-12-26 | 陈国宝 | Multilayer coreless coil permanent magnet motor |
WO2012113159A1 (en) * | 2011-02-25 | 2012-08-30 | 深圳市安托山特种机电有限公司 | Rare-earth permanent magnetic coreless power generator set |
EP2493056B1 (en) * | 2011-02-28 | 2020-06-24 | Siemens Aktiengesellschaft | Electrical machine, in particular an electrical generator |
WO2012128646A1 (en) * | 2011-03-24 | 2012-09-27 | Greenway Energy As | Coil assembly for three phased transverse axial flux multi disk machines |
WO2012148905A2 (en) * | 2011-04-25 | 2012-11-01 | Morningside Technology Ventures Ltd. | Polymeric solar concentrator and solar thermal device incorporating same |
FR2975546B1 (en) * | 2011-05-16 | 2014-05-02 | Bernard Perriere | TURBINE GENERATING ELECTRICAL CURRENT |
KR101392098B1 (en) * | 2011-05-26 | 2014-05-08 | 도요타지도샤가부시키가이샤 | Coil correction method and coil correction mechanism |
JP2013102659A (en) * | 2011-11-10 | 2013-05-23 | Toru Masuzawa | Lorentz motor |
RU2506688C2 (en) * | 2011-12-05 | 2014-02-10 | Сергей Михайлович Есаков | Magnetoelectric generator |
CN102522257B (en) * | 2011-12-09 | 2015-07-15 | 沈阳工业大学 | Disk-type gyromagnet longitudinal-blowing vacuum arc extinguish chamber |
CN102496518B (en) * | 2011-12-09 | 2015-04-15 | 沈阳工业大学 | Disk-type gyromagnetic vacuum arc extinguish chamber |
CN102522258B (en) * | 2011-12-09 | 2015-07-15 | 沈阳工业大学 | Disc-type gyromagnetic transverse blowing vacuum arc extinguish chamber |
CN102522256B (en) * | 2011-12-09 | 2015-07-15 | 沈阳工业大学 | Disc-type overlapping gyromagnetic vacuum arc extinguish chamber |
CN102592881B (en) * | 2011-12-09 | 2015-07-15 | 沈阳工业大学 | Disc type laminated gyromagnetic transversely-blowing vacuum arc extinguishing chamber |
CN102522259B (en) * | 2011-12-09 | 2015-07-15 | 沈阳工业大学 | Disc-type overlapping gyromagnetic longitudinal blowing vacuum arc extinguish chamber |
WO2014033716A1 (en) * | 2012-08-27 | 2014-03-06 | Albus Technologies Ltd. | Planar stator with efficient use of space |
CN103840588B (en) * | 2012-11-26 | 2016-08-17 | 直得科技股份有限公司 | Coreless linear motor coil assembly structure and unit coil thereof |
US9148047B2 (en) * | 2012-11-30 | 2015-09-29 | Chieftek Precision Co., Ltd. | Coil assembly having separation plates for iron less linear motor |
KR101437258B1 (en) * | 2013-01-09 | 2014-09-03 | 고려대학교 산학협력단 | Armature for coreless linear motor and coreless linear motor using the same |
CN103312070B (en) * | 2013-05-29 | 2016-07-13 | 黄国灿 | A kind of Novel electromagnetic coil |
US9890575B2 (en) | 2013-12-09 | 2018-02-13 | Viking Access Systems, Llc | Movable barrier operator with removable power supply module |
US9214837B2 (en) | 2013-12-13 | 2015-12-15 | Arm Limited | Electric motor with plural stator components |
US20160013694A1 (en) * | 2014-07-10 | 2016-01-14 | Metropolitan Industries, Inc. | Deeply nested coil arrays for motors and generators |
CN104638795A (en) * | 2015-02-03 | 2015-05-20 | 吕周安 | Stator winding structure of brushless coreless disk permanent magnetic motor and motor with the stator winding structure |
US10778049B2 (en) * | 2016-06-07 | 2020-09-15 | Sapphire Motors | Stator assembly with stack of coated conductors |
KR101769717B1 (en) * | 2016-09-19 | 2017-08-21 | 한양대학교 산학협력단 | Slotless motor and coil structure of the same |
KR101934889B1 (en) | 2016-11-09 | 2019-01-03 | 엘지전자 주식회사 | Coil substrate |
JP6389501B2 (en) * | 2016-11-30 | 2018-09-12 | 公明 岩谷 | Coil for rotating machine and rotating machine |
CN108242860A (en) * | 2016-12-27 | 2018-07-03 | 维尔纳(福建)电机有限公司 | A kind of stator without iron core and motor |
JP6775842B2 (en) * | 2017-01-30 | 2020-10-28 | 竹内 啓佐敏 | Coreless electromechanical equipment and coil assembly |
FR3064423B1 (en) * | 2017-03-22 | 2019-11-15 | Whylot Sas | ROTOR FOR MOTOR OR ELECTROMAGNETIC GENERATOR WITH ALVEOLAR STRUCTURE COMPRISING ALVEOLES FOR THE HOUSING OF RESPECTIVE MAGNETS |
CN106849437A (en) * | 2017-04-14 | 2017-06-13 | 厦门威而特动力科技有限公司 | A kind of armature winding and radial magnetic field permanent magnet iron coreless synchronous motor |
JP2020521418A (en) | 2017-05-23 | 2020-07-16 | ディーピーエム テクノロジーズ インク. | Variable coil connection system |
CN109217518B (en) * | 2017-07-06 | 2021-07-27 | 上海合栗智能科技有限公司 | Linear motor and stator thereof |
CN109586451A (en) * | 2018-11-28 | 2019-04-05 | 华中科技大学 | Axial magnetic flux iron-core-free winding, preparation process and the magneto with the winding |
RU2708370C1 (en) * | 2019-01-22 | 2019-12-09 | Общество с ограниченной ответственностью "Институт конгломеративных технологий" | Multi-winding low-speed generator |
GB2580916B (en) * | 2019-01-29 | 2021-09-29 | Saietta Group PLC | Axial flux electrical machine |
US11722026B2 (en) | 2019-04-23 | 2023-08-08 | Dpm Technologies Inc. | Fault tolerant rotating electric machine |
IT201900006398A1 (en) * | 2019-05-28 | 2020-11-28 | Navis S R L | AXIAL FLOW MULTISTAGE ROTATING MACHINE WITH PERMANENT MAGNETS AND "SLOT-LESS" STATORS, WITH INNOVATIVE STRUCTURE FOR ROTOR AND STATOR DISCS |
US20220186732A1 (en) * | 2020-12-11 | 2022-06-16 | Sapphire Motors | Integrated pump assembly with one moving part with stacked stator |
EP4315556A1 (en) | 2021-05-04 | 2024-02-07 | Exro Technologies Inc. | Battery control systems and methods |
CN117337545A (en) | 2021-05-13 | 2024-01-02 | Exro技术公司 | Method and device for driving coils of a multiphase motor |
RU210261U1 (en) * | 2021-11-29 | 2022-04-04 | Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" | End electric machine |
Citations (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3215876A (en) * | 1963-04-22 | 1965-11-02 | Nichols Ind Inc | Generator units including provision for generating from flux leakage |
US3226586A (en) | 1959-02-05 | 1965-12-28 | Printed Motors Inc | Axial airgap rotary machines |
US3348086A (en) | 1963-11-20 | 1967-10-17 | Fujiya Denki Kabushiki Kaisha | Flat coreless direct current motor |
US3678314A (en) | 1970-06-17 | 1972-07-18 | Alastair Howroyd Carter | Discoidal electric motor |
US3686521A (en) | 1971-04-07 | 1972-08-22 | Kollmorgen Corp | Magnetic motors |
US3700944A (en) * | 1971-11-08 | 1972-10-24 | Ford Motor Co | Disc-type variable reluctance rotating machine |
US3790835A (en) * | 1971-03-10 | 1974-02-05 | Matsushita Electric Ind Co Ltd | Disc armature |
US3988024A (en) * | 1974-06-14 | 1976-10-26 | Tokyo Shibaura Electric Co., Ltd. | Turntable apparatus |
US3999092A (en) * | 1974-04-04 | 1976-12-21 | Canadian General Electric Company Limited | Permanent magnet synchronous dynamoelectric machine |
US4007390A (en) * | 1973-07-26 | 1977-02-08 | Papst-Motoren Kg | Brushless D-C motor |
US4068143A (en) * | 1973-12-19 | 1978-01-10 | General Electric Company | Discoidal winding for dynamoelectric machines |
GB1581350A (en) | 1978-03-14 | 1980-12-10 | Campbell P | Electrical motor |
JPS56121359A (en) | 1980-02-28 | 1981-09-24 | Nippon Radiator Co Ltd | Armature for flat motor and manufacture thereof |
JPS56153962A (en) | 1980-04-28 | 1981-11-28 | Nippon Radiator Co Ltd | Manufacture of armature for flat motor |
US4319152A (en) | 1976-07-12 | 1982-03-09 | Gils Adrianus W Van | Laminated winding for electric machines |
JPS57135645A (en) | 1981-02-13 | 1982-08-21 | Mitsubishi Electric Corp | Polyphase armature coil |
US4361776A (en) * | 1979-07-11 | 1982-11-30 | Sony Corporation | Coil assembly for flat brushless motor |
US4371801A (en) * | 1978-10-11 | 1983-02-01 | General Electric Company | Method and apparatus for output regulation of multiple disk permanent magnet machines |
SU1056929A3 (en) | 1979-04-13 | 1983-11-23 | Институтул Де Церцетари Пентру Индустриа Электротехника (Инопредприятие) | Disc armature for electric machine |
US4420875A (en) * | 1979-12-05 | 1983-12-20 | Mavilor Systemes | Method of mounting and casting a flat rotor |
JPS6051447A (en) * | 1983-08-29 | 1985-03-22 | Takahashi Yoshiteru | Disk type brushless motor with preferable efficiency of superposed armature coil type |
US4551645A (en) * | 1981-06-04 | 1985-11-05 | Fuji Photo Film Co., Ltd. | Disc type brushless motor |
JPS62193543A (en) | 1986-02-19 | 1987-08-25 | Hitachi Ltd | Moving-coil type linear motor |
US4743813A (en) * | 1985-10-15 | 1988-05-10 | Mavilor Systemes S.A. | Direct current motor with electronic commutation circuit and encoder-controlled winding power |
US4839543A (en) * | 1988-02-04 | 1989-06-13 | Trilogy Systems Corporation | Linear motor |
US4868443A (en) | 1987-04-18 | 1989-09-19 | Lothar Rossi | Tachogenerator for electric machines |
US5087844A (en) | 1989-11-07 | 1992-02-11 | Hitachi Metals, Ltd. | Linear motor |
US5146144A (en) * | 1990-06-08 | 1992-09-08 | Eastman Kodak Company | Electric motor |
US5168185A (en) * | 1990-10-09 | 1992-12-01 | Hitachi Metals, Ltd. | Swing-type actuator |
US5304884A (en) * | 1988-01-19 | 1994-04-19 | Olympus Optical Company Limited | Molded armature |
EP0633563A2 (en) | 1988-05-04 | 1995-01-11 | M4 Data Limited | Tape drive machines |
US5396140A (en) * | 1993-05-28 | 1995-03-07 | Satcon Technology, Corp. | Parallel air gap serial flux A.C. electrical machine |
US5397953A (en) * | 1993-11-17 | 1995-03-14 | The United States Of America As Represented By The Secretary Of The Navy | Stator for disc type electric motor |
US5589722A (en) * | 1993-04-16 | 1996-12-31 | Teac Corporation | Sheet coil motor and method of fabricating the same |
US5619087A (en) | 1992-03-18 | 1997-04-08 | Kabushiki Kaisha Toshiba | Axial-gap rotary-electric machine |
US5744896A (en) * | 1996-05-21 | 1998-04-28 | Visual Computing Systems Corp. | Interlocking segmented coil array |
US5767600A (en) | 1997-02-27 | 1998-06-16 | Whiteley; Eric | Modular motor |
-
1996
- 1996-05-21 US US08/651,973 patent/US5744896A/en not_active Ceased
-
1997
- 1997-05-19 AU AU32327/97A patent/AU3232797A/en not_active Abandoned
- 1997-05-19 CN CN97194667A patent/CN1093697C/en not_active Expired - Fee Related
- 1997-05-19 BR BR9709328A patent/BR9709328A/en not_active IP Right Cessation
- 1997-05-19 RU RU98123112/09A patent/RU2226312C2/en not_active IP Right Cessation
- 1997-05-19 EP EP97928006A patent/EP0903001A4/en not_active Withdrawn
- 1997-05-19 WO PCT/US1997/009860 patent/WO1997044880A1/en active IP Right Grant
- 1997-05-19 CA CA002255958A patent/CA2255958C/en not_active Expired - Lifetime
- 1997-05-19 KR KR10-1998-0709565A patent/KR100421726B1/en not_active IP Right Cessation
- 1997-05-19 JP JP09543082A patent/JP2000511399A/en active Pending
-
2000
- 2000-04-28 US US09/561,826 patent/USRE38939E1/en not_active Expired - Lifetime
Patent Citations (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3226586A (en) | 1959-02-05 | 1965-12-28 | Printed Motors Inc | Axial airgap rotary machines |
US3215876A (en) * | 1963-04-22 | 1965-11-02 | Nichols Ind Inc | Generator units including provision for generating from flux leakage |
US3348086A (en) | 1963-11-20 | 1967-10-17 | Fujiya Denki Kabushiki Kaisha | Flat coreless direct current motor |
US3678314A (en) | 1970-06-17 | 1972-07-18 | Alastair Howroyd Carter | Discoidal electric motor |
US3790835A (en) * | 1971-03-10 | 1974-02-05 | Matsushita Electric Ind Co Ltd | Disc armature |
US3686521A (en) | 1971-04-07 | 1972-08-22 | Kollmorgen Corp | Magnetic motors |
US3700944A (en) * | 1971-11-08 | 1972-10-24 | Ford Motor Co | Disc-type variable reluctance rotating machine |
US4007390A (en) * | 1973-07-26 | 1977-02-08 | Papst-Motoren Kg | Brushless D-C motor |
US4068143A (en) * | 1973-12-19 | 1978-01-10 | General Electric Company | Discoidal winding for dynamoelectric machines |
US3999092A (en) * | 1974-04-04 | 1976-12-21 | Canadian General Electric Company Limited | Permanent magnet synchronous dynamoelectric machine |
US3988024A (en) * | 1974-06-14 | 1976-10-26 | Tokyo Shibaura Electric Co., Ltd. | Turntable apparatus |
US4319152A (en) | 1976-07-12 | 1982-03-09 | Gils Adrianus W Van | Laminated winding for electric machines |
GB1581350A (en) | 1978-03-14 | 1980-12-10 | Campbell P | Electrical motor |
US4371801A (en) * | 1978-10-11 | 1983-02-01 | General Electric Company | Method and apparatus for output regulation of multiple disk permanent magnet machines |
SU1056929A3 (en) | 1979-04-13 | 1983-11-23 | Институтул Де Церцетари Пентру Индустриа Электротехника (Инопредприятие) | Disc armature for electric machine |
US4361776A (en) * | 1979-07-11 | 1982-11-30 | Sony Corporation | Coil assembly for flat brushless motor |
US4420875A (en) * | 1979-12-05 | 1983-12-20 | Mavilor Systemes | Method of mounting and casting a flat rotor |
JPS56121359A (en) | 1980-02-28 | 1981-09-24 | Nippon Radiator Co Ltd | Armature for flat motor and manufacture thereof |
JPS56153962A (en) | 1980-04-28 | 1981-11-28 | Nippon Radiator Co Ltd | Manufacture of armature for flat motor |
JPS57135645A (en) | 1981-02-13 | 1982-08-21 | Mitsubishi Electric Corp | Polyphase armature coil |
US4551645A (en) * | 1981-06-04 | 1985-11-05 | Fuji Photo Film Co., Ltd. | Disc type brushless motor |
JPS6051447A (en) * | 1983-08-29 | 1985-03-22 | Takahashi Yoshiteru | Disk type brushless motor with preferable efficiency of superposed armature coil type |
US4743813A (en) * | 1985-10-15 | 1988-05-10 | Mavilor Systemes S.A. | Direct current motor with electronic commutation circuit and encoder-controlled winding power |
JPS62193543A (en) | 1986-02-19 | 1987-08-25 | Hitachi Ltd | Moving-coil type linear motor |
US4868443A (en) | 1987-04-18 | 1989-09-19 | Lothar Rossi | Tachogenerator for electric machines |
US5304884A (en) * | 1988-01-19 | 1994-04-19 | Olympus Optical Company Limited | Molded armature |
JPH01264558A (en) | 1988-02-04 | 1989-10-20 | Trilogy Syst Corp | Linear motor |
US4839543A (en) * | 1988-02-04 | 1989-06-13 | Trilogy Systems Corporation | Linear motor |
EP0633563A2 (en) | 1988-05-04 | 1995-01-11 | M4 Data Limited | Tape drive machines |
US5087844A (en) | 1989-11-07 | 1992-02-11 | Hitachi Metals, Ltd. | Linear motor |
US5146144A (en) * | 1990-06-08 | 1992-09-08 | Eastman Kodak Company | Electric motor |
US5168185A (en) * | 1990-10-09 | 1992-12-01 | Hitachi Metals, Ltd. | Swing-type actuator |
US5619087A (en) | 1992-03-18 | 1997-04-08 | Kabushiki Kaisha Toshiba | Axial-gap rotary-electric machine |
US5589722A (en) * | 1993-04-16 | 1996-12-31 | Teac Corporation | Sheet coil motor and method of fabricating the same |
US5396140A (en) * | 1993-05-28 | 1995-03-07 | Satcon Technology, Corp. | Parallel air gap serial flux A.C. electrical machine |
US5397953A (en) * | 1993-11-17 | 1995-03-14 | The United States Of America As Represented By The Secretary Of The Navy | Stator for disc type electric motor |
US5744896A (en) * | 1996-05-21 | 1998-04-28 | Visual Computing Systems Corp. | Interlocking segmented coil array |
US5767600A (en) | 1997-02-27 | 1998-06-16 | Whiteley; Eric | Modular motor |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040002677A1 (en) * | 2001-12-11 | 2004-01-01 | Gentsler Curtis C. | Alternate site gene therapy |
US20060145558A1 (en) * | 2004-05-28 | 2006-07-06 | Toshiaki Kashihara | Alternator for a vehicle |
US20060284513A1 (en) * | 2005-06-20 | 2006-12-21 | Purvines Stephen H | Electric motor stator |
US7345398B2 (en) * | 2005-06-20 | 2008-03-18 | Kurz-Kasch, Inc. | Electric motor stator |
US20070103025A1 (en) * | 2005-10-25 | 2007-05-10 | Maxon Motor Ag | Electric motor with multilayered rhombic single coils made of wire |
US7671504B2 (en) * | 2005-10-25 | 2010-03-02 | Maxon Motor Ag | Electric motor with multilayered rhombic single coils made of wire |
US20100253173A1 (en) * | 2007-09-14 | 2010-10-07 | Koji Miyata | Axial gap type coreless rotating machine |
US8299676B2 (en) * | 2007-09-14 | 2012-10-30 | Shin-Etsu Chemical Co., Ltd. | Axial gap type coreless rotating machine |
US20110027084A1 (en) * | 2009-07-31 | 2011-02-03 | Andrew Rekret | Novel turbine and blades |
US20130062889A1 (en) * | 2010-03-23 | 2013-03-14 | Adaptive Generators As | Variable electrical generator |
US8878373B2 (en) * | 2010-03-23 | 2014-11-04 | Adaptive Generators As | Variable electrical generator |
US20120001502A1 (en) * | 2010-07-01 | 2012-01-05 | Yee-Chun Lee | Multi-unit Modular Stackable Switched Reluctance Motor System with Parallely Excited Low Reluctance Circumferential Magnetic Flux loops for High Torque Density Generation |
US20130093280A1 (en) * | 2011-10-17 | 2013-04-18 | GM Global Technology Operations LLC | Multi-filar bar conductors for electric machines |
US20130093281A1 (en) * | 2011-10-17 | 2013-04-18 | Gb Global Technology Operations Llc | Bar conductor shapes for electric machines |
US8866361B2 (en) * | 2011-10-17 | 2014-10-21 | GM Global Technology Operations LLC | Bar conductor shapes for electric machines |
Also Published As
Publication number | Publication date |
---|---|
KR20000016004A (en) | 2000-03-25 |
RU2226312C2 (en) | 2004-03-27 |
AU3232797A (en) | 1997-12-09 |
CA2255958A1 (en) | 1997-11-27 |
US5744896A (en) | 1998-04-28 |
KR100421726B1 (en) | 2004-06-23 |
CA2255958C (en) | 2002-11-05 |
CN1218585A (en) | 1999-06-02 |
EP0903001A1 (en) | 1999-03-24 |
CN1093697C (en) | 2002-10-30 |
BR9709328A (en) | 1999-08-10 |
EP0903001A4 (en) | 2001-06-13 |
WO1997044880A1 (en) | 1997-11-27 |
JP2000511399A (en) | 2000-08-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
USRE38939E1 (en) | Interlocking segmented coil array | |
US7375449B2 (en) | Optimized modular electrical machine using permanent magnets | |
US6040650A (en) | Stator with coplanar tapered conductors | |
JP5033552B2 (en) | Axial gap type coreless rotating machine | |
US5057731A (en) | Simplified spindle motor for disc drive | |
EP0495582B1 (en) | High efficiency, low reactance disk-type machine including a rotor and stator | |
US20060038461A1 (en) | Optimized air core armature | |
US4788465A (en) | Armature for DC motor | |
RU98123112A (en) | SEGMENT MATRIX FROM MUTUALLY CONNECTED COILS | |
US6603237B1 (en) | High frequency electric motor or generator including magnetic cores formed from thin film soft magnetic material | |
US6879080B2 (en) | High frequency electric motor or generator including magnetic cores formed from thin film soft magnetic material | |
US8933607B1 (en) | High efficiency air core motor-generator | |
JP2008512072A (en) | Linear or rotation type 4-pole synchronous direct drive motor | |
US3550645A (en) | Wire wound armature,method and apparatus for making same | |
EP0983628A2 (en) | Brushless synchronous rotary electrical machine | |
US4859890A (en) | Flat windings and coil forms | |
CN109478813B (en) | Axial gap type rotating electric machine | |
US4068143A (en) | Discoidal winding for dynamoelectric machines | |
US6617748B2 (en) | Machine with cup-shaped armature and air gap | |
US4691746A (en) | Flat windings, coil forms, and winding method | |
US11689073B2 (en) | Rotor core design | |
US3534469A (en) | Method of manufacturing windings for disc-type dc machine armatures | |
JP2006506034A (en) | High frequency motor or generator | |
CN212660085U (en) | Disk type motor | |
JP4121040B2 (en) | Winding method and coil for rotating electrical equipment |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Fee payment |
Year of fee payment: 8 |
|
SULP | Surcharge for late payment |
Year of fee payment: 7 |
|
FPAY | Fee payment |
Year of fee payment: 12 |