EP3874583A1 - Conception de stator et de rotor pour exigences de couple périodiques - Google Patents

Conception de stator et de rotor pour exigences de couple périodiques

Info

Publication number
EP3874583A1
EP3874583A1 EP19805848.9A EP19805848A EP3874583A1 EP 3874583 A1 EP3874583 A1 EP 3874583A1 EP 19805848 A EP19805848 A EP 19805848A EP 3874583 A1 EP3874583 A1 EP 3874583A1
Authority
EP
European Patent Office
Prior art keywords
stator
magnetic flux
rotation
axis
rotor
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.)
Pending
Application number
EP19805848.9A
Other languages
German (de)
English (en)
Inventor
Steven Robert Shaw
George Harder Milheim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
eCircuit Motors Inc
Original Assignee
eCircuit Motors Inc
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
Priority claimed from US16/665,763 external-priority patent/US11527933B2/en
Application filed by eCircuit Motors Inc filed Critical eCircuit Motors Inc
Publication of EP3874583A1 publication Critical patent/EP3874583A1/fr
Pending legal-status Critical Current

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
    • H02K21/24—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
    • 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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246—Variable reluctance rotors
    • 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
    • H02K3/26—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components

Definitions

  • Permanent magnet axial flux motors and generators described by several patents including U.S. Patent No. 7,109,625 (“the’625 patent”), feature a generally planar printed circuit board stator (PCS) interposed between magnets featuring alternating north-south poles.
  • PCS printed circuit board stator
  • These printed circuit board stators when supported to the fixed frame from the outside edge of the stator, have a hole through which the shaft linking the rotors passes.
  • An alternate embodiment is to interchange roles of the inner and outer radius, resulting in a situation where the inner radius of the stator is supported, and the rotor envelopes the stator. The shaft is effectively moved to the outer radius in this configuration, sometimes called an“out-runner.”
  • FIG. 1 A shows an example of an axial flux motor or generator with which some aspects of this disclosure may be employed
  • FIG. 1B is an expanded view showing the components of the axial flux motor or generator shown in FIG. 1 A and a means for assembling such components;
  • FIG. 2 is a conceptual diagram showing three printed circuit board stators having equal areas but different configurations
  • FIG. 3 is a diagram showing how multiple stator segments may be arranged for manufacture on a printed circuit board panel of standard dimensions
  • FIG. 4 is a diagram showing how a subset of the stator segments shown in FIG. 3 would appear if they were arranged edge to edge on the circuit board panel shown in FIG. 3;
  • FIG. 5 shows an example arrangement of a stator segment with respect to magnets on a rotor in accordance with some aspects of the present disclosure
  • FIG. 6 shows the same arrangement as FIG. 5, but where the rotor is shown at an angle where the stator segment overlaps with a magnet section that provides peak torque;
  • FIG. 7 shows an example arrangement of multiple stator segments with respect to magnets on a rotor in accordance with some aspects of the present disclosure.
  • FIG. 8 illustrates a cross section of an example embodiment of an axial flux motor that is configured and integrated with a washing machine load in accordance with some aspects of the present disclosure.
  • a motor or generator comprises a rotor and a stator, wherein the rotor has an axis of rotation and is configured to generate first magnetic flux parallel to the axis of rotation, the stator is configured to generate second magnetic flux parallel to the axis of rotation, and at least one of the rotor or the stator is configured to generate a magnetic flux profile that is non- uniformly distributed about the axis of rotation.
  • a method involves arranging one or more magnetic flux producing windings of a stator non-uniformly about an axis of rotation of a rotor of an axial flux motor or generator.
  • a rotor for use in a motor or generator comprises a support structure and one or more magnet segments that are supported by the support structure and that generate first magnetic flux parallel to an axis of rotation about which the support structure rotates when assembled with a stator that generates second magnetic flux parallel to the axis of rotation, wherein the one or more magnet segments are configured and arranged to generate a magnetic flux profile that is non-uniformly distributed about the axis of rotation.
  • the magnetic flux generating components of the rotor are also arranged such that, at any given point in time, the locations of peak magnetic flux generated by the rotor are likewise distributed uniformly with respect to angle about the rotor’s axis of rotation. Accordingly, in all such machines, at any given time the machine is in operation, the locations of peak magnetic flux generated by each of the rotor and the stator are uniformly distributed as a function of angle about the machine’s axis of rotation.
  • the same angle separates each location of peak magnetic flux from the next adjacent location of peak magnetic flux about the axis of rotation so that that the magnetic flux profile of each of the rotor and the stator are uniformly distributed about the axis of rotation.
  • stator and/or the rotor may instead be configured to have a magnetic flux profile that is non- uniformly distributed about the rotor’s axis of rotation.
  • a stator can be configured so that it describes a fraction an arc surrounding the principle axis of the machine.
  • stator segment can be located, due to the integration of the machine with the attached load, at a large radius compared to a stator of equal area distributed uniformly about the same axis, the torque produced may be proportional to the increase in radius at which the stator segment is disposed, assuming equivalent flux in the gap and current density limits in the stator.
  • the cost of maintaining equivalent flux in the gap for an“off center” stator segment is an increase in magnet volume inversely proportional to the angle subtended by that segment. This is not a desirable tradeoff in most cases.
  • the magnet material may be distributed non-uniformly with respect to the rotor, so that the stator is exposed to peak magnetic flux density at the shaft angles where peak torque is desired.
  • a machine designed according to this principle may offer similar advantages.
  • stator and magnet system to produce peak torque at specific angles is not limited to one stator segment and/or one concentration of magnetic material on the rotor, although this is the simplest embodiment.
  • Embodiments including one or more non-uniformly distributed stator segments and/or one or more non-uniformly distributed magnet segments may provide useful combinations of torque capability as a function of angle. It should be appreciated that the same or similar torque capability as a function of angle can be achieved using different combinations of one or more non- uniformly distributed stator segments and one or more non-uniformly distributed magnet segments. For example, the same or similar torque capability as a function of angle can be achieved by interchanging the distribution of stator segments versus rotor magnet locations. This may allow designers to effect tradeoffs in the cost of magnet material and stator area while achieving the same or similar torque capability as a function of angle.
  • the design of a machine to produce peak torque at a particular angle does not preclude continuous rotation.
  • a machine designed according to the principles disclosed here can supply torque in a series of pulses (at the peak torque angles) that are smoothed by the moment of inertia of the attached load to provide approximately constant speed.
  • An advantage of this design is that the losses in the stator due to eddy currents may be zero when the stator does not overlap the magnets.
  • Another possibility for continuous rotation is to distribute magnets so that the stator segment always sees magnet flux, but at smaller magnitude than the“peak torque” angles.
  • Some embodiments described herein may be particularly advantageous for applications where the machine radius can be significantly increased, relative to a conventional design.
  • a planar circuit board stator (PCS) segment disposed at a larger radius than a uniform planar circuit board stator may achieve higher peak torque per unit area of stator.
  • stator segments can be“tiled” or arranged on a printed circuit board“panel” of standard size. This may allow a more efficient utilization of printed circuit board material and reduce the cost of the associated machine.
  • Examples of application areas include reciprocating piston or diaphragm type pumps, which may have a periodic torque requirement. Also, for purposes of balance, these machines frequently include an off-center mass that can potentially be replaced by an asymmetrically designed rotor. Similarly, generators coupled to single piston engines may benefit from co-design of balancing masses with the magnetic materials in a stator- segment type generator. Other potential applications include washing machines or other applications where the motor or generator moves through a limited angle, and periodic or “reversing” type loads.
  • the components of this expression include integration from a first radius rl to a second radius r2, comprising the active area of the stator.
  • the integral covers a complete annulus by the limits of integration on Q.
  • the force density is 0 -directed due to the axial flux and radial current density, i.e., fdens— J(r)xB
  • the force density is the product of the current density supported by the stator, and magnetic flux density resulting from the rotor magnet circuit and stator reaction at that current density.
  • B is assumed to be radial.
  • diverging radial traces effectively introduce a l/r decrease in current density from the inner radius rl .
  • a model capturing this effect is
  • J 0 is the maximum supported current density based on the interference of features at a given copper weight, via size and clearance requirements at the inner radius.
  • J 0 will approach a value dependent primarily on thermal considerations and clearance requirements. Taking J 0 as a constant for purposes of comparison between otherwise equivalent stators tends to make a conventional stator located around the central shaft, with a smaller rl, appear more competitive than a stator segment at a larger radius.
  • the area A of the stator or stator segment with angular extent d is [0025]
  • d 2p.
  • d ideally corresponds to a whole number of pole pairs.
  • the pole spacing over a segment need not also conform to the usual constraint of disposing poles uniformly over 2p rad, as in a conventional stator.
  • stator segments with larger r x offer higher peak torque per unit area
  • stator segments and magnetic material overlap fully at specific rotor angles (or angle ranges), peak torque is available (3) there is no eddy current loss in the machine when the magnetic material and stator do not overlap
  • stator segments can be obtained where r x , r 2 , and d are such that the segments can“nest” on a printed circuit board panel, minimizing wasted material and cost, and (5) peak torque per unit area (or per unit cost) increases with the radius of stator segment.
  • a practical design procedure for segments is to design conventional stator prototypes, where the torque requirement is increased by the ratio of the poles in the conventional stator relative to the poles intended to be preserved in the segment.
  • This procedure while expedient, does not exploit the freedom in the segmented design, because the pole spacing is simultaneously constrained to the angular extent of the segment, and to the 2p extent of the conventional design.
  • the segment angle d does not need to be a divisor of 2p and can thus be optimized to meet the design constraints.
  • Combinations of stator segments and magnetic material, concentrated at particular angles on the fixed frame and rotor, can achieve various torque capabilities as a function of angle.
  • One or more areas on the rotor may carry magnetic materials comprising different flux densities, one or more pole pairs, and may be distributed at various angles.
  • FIG. 1A shows an example of a system 100 employing a planar composite stator 110 in an assembly with rotor components l04a and l04b, shaft 108, wires 114, and controller 112.
  • FIG. 1B An expanded view showing these components and a means for their assembly is shown in FIG. 1B.
  • the pattern of magnetic poles in the permanently magnetized portions l06a, l06b of the rotor assembly is also evident in the expanded view of FIG. 1B.
  • FIG.1 A is an example of an embodiment where the electrical connections 114 are taken at the outer radius of the PCS 110, and the stator is mounted to a frame or case at the outer periphery.
  • the“out-runner” configuration involves mounting the stator at the inner radius, making electrical connections 114 at the inner radius, and replacing the shaft 108 with an annular ring separating the rotor halves. It is also possible to configure the system with just one magnet, either l06a or l06b, or to interpose multiple stators between successive magnet assemblies. Wires 114 may also convey information about the position of the rotor based on the readings of Hall-effect or similar sensors mounted on the stator. Not shown, but similar in purpose, an encoder attached to the shaft 108 may provide position information to the controller 112.
  • the system 100 in FIGS.1 A and 1B can function either as a motor, or a generator, depending on the operation of the controller 112 and components connected to the shaft 108.
  • the controller 112 operates switches so that the currents in the stator 110 create a torque about the shaft, due to the magnetic flux in the gap originating from the magnets l04a, l04b connected to the shaft 108.
  • the magnetic flux in the gap and/or the position of the rotor may be measured or estimated to operate the switches to achieve torque output at the shaft 108.
  • a source of mechanical rotational power connected to the shaft 108 creates voltage waveforms at the terminals 112 of the stator.
  • These voltages can either be directly applied to a load, or they can be rectified with a three- phase (or poly phase) rectifier within the controller 112.
  • the rectifier implementation 112 can be“self-commutated” using diodes in generator mode, or can be constructed using the controlled switches of the motor controller, but operated such that the shaft torque opposes the torque provided by the mechanical source, and mechanical energy is converted to electrical energy.
  • an identical configuration in Figure 1 A may function as both a generator and motor, depending on how the controller 112 is operated.
  • the controller 112 may include filter components that mitigate switching effects, reduce EMI/RFI from the wires 114, reduce losses, and provide additional flexibility in the power supplied to or delivered from the controller.
  • FIG. 2 shows geometries of three stators 202, 204, 206 with different angular and radial extent, but of equal area.
  • Stators 204 and 206 differ by the inner radius.
  • Stator 206 shows relative dimensions typical of stators as described by the’625 patent.
  • Stator 204 is a thin annular design. In stator 204, the inner radius is increased, but a stator with these relative dimensions does not make efficient use of a“panel” of printed circuit board material.
  • Stator 202 shows a stator segment 208, as proposed herein, of equal area and equivalent radius to stator 204. All else equal, at the larger radii, stators 202 and 204 would produce a higher peak torque than stator 206 as the radius increases the torque arm.
  • FIG. 3 shows the“panelization,” or packing, of stator segments like the segment 208 shown in FIG. 1, on a standard sized printed circuit board panel 302.
  • the effective utilization of the panel 302 is high with the illustrated arrangement. Cost of the stator segments 208 is inversely proportional to the utilization of the panel 302.
  • FIG. 4 shows an ineffective arrangement of segments 208 of the same size as in FIG. 3 on the panel 302. While this arrangement is not practical, it shows the effective panel utilization that would be achieved for a conventional stator with the same inner and outer radii as achieved by the segments 208.
  • FIG. 5 shows an example arrangement of a stator segment 208 with respect to magnets 502 on a rotor 504.
  • a dense angular extent 506 of the magnets 502, also referred to herein as a“dense magnet area,” on the rotor 504 is provided to achieve peak torque at the angle of overlap with the stator segment 208.
  • Less dense angular extents 508 of the magnets 502, also referred to herein as“less dense magnet areas,” are arranged to provide a lower torque capability independent of angle.
  • non magnetic elements may be added in the vicinity or the less dense magnet areas 508 to balance the weight of the rotor 504 as a whole.
  • an additional rotor portion (not shown) having a corresponding, though opposite polarity, magnet arrangement may be positioned above the illustrated portion of the rotor 504 such that the stator segment 208 may be positioned within a gap between the two rotor portions, with lines of magnetic flux extending in a direction parallel to the axis of rotation of the rotor between pairs of opposing, opposite polarity magnets.
  • an additional rotor portion (not shown) having a corresponding, though opposite polarity, magnet arrangement may be positioned above the illustrated portion of the rotor 504 such that the stator segment 208 may be positioned within a gap between the two rotor portions, with lines of magnetic flux extending in a direction parallel to the axis of rotation of the rotor between pairs of opposing, opposite polarity magnets.
  • stator segment 208 may include conductive traces and/or vias, e.g., disposed on one or more dielectric layers, that are configured to form windings that, when energized with current, generate magnetic flux in a direction parallel to the axis of rotation of the rotor.
  • Such windings may be configured to receive one or more phases of current from a power supply (not shown in FIG. 5), and may be arranged in one or more spirals, one or more serpentine patterns, or otherwise, so as to generate such magnetic flux.
  • the stator segment 208 may be held in place via an arcuate attachment member 510 to which the stator segment 208 may be attached using one or more fasteners 512, and the one or more windings (not illustrated) of the stator segment 208 may be connected to terminals 514 associated with the attachment member 510, which terminals may be connected to a controller (not shown in FIG. 5), such as the controller 112 discussed above in connection with FIGS.
  • FIG. 6 shows the same configuration as FIG. 5, but with the rotor 504 positioned at an angle where the stator segment 208 overlaps with the dense magnet section 506 that provides peak torque.
  • FIG. 7 shows an alternate arrangement to FIGS. 4 and 5.
  • stator segments 502a-g may be arranged so that they fully or nearly describe an annular stator with constant available torque at any angle.
  • a subset of the stator segments 502a-g may be made smaller, may be arranged with a coarser pitch, may contain fewer winding“turns,” and/or may be supplied with less power than one or more other stator segments 502, so that a machine with concentrated magnets can offer angle-specific peak torque, while still providing torque capability at any angle.
  • the stator segment 502a may be configured, arranged and/or energized differently than the other stator segments 502b-g for such a purpose.
  • stator segment(s) 208 no matter the particular arrangement of magnet(s) 502 and stator segment(s) 208 that is employed, in at least some circumstances, care may be taken to ensure that at least one stator segment 208 at least partially overlaps at least one magnet 502 at each position during a revolution of the rotor 504, so that the rotor 504 does not become “stuck” at a position where no magnetic flux from a stator segments 208 interacts with magnetic flux from a magnet 502.
  • stator segment(s) 208 and/or the magnet(s) 502 of the rotor 504 are configured to have a magnetic flux profile that is non-uniformly distributed about the machine’s principle axis of rotation.
  • stator segment(s) 208 are arranged such that, at any given point in time when the windings of the stator 504 are energized with current, the locations of peak magnetic flux generated by the stator are non-uniformly distributed with respect to angle about the rotor’s axis of rotation.
  • the magnets 502 of a rotor 504 are also arranged such that, at any given point in time, the locations of peak magnetic flux generated by the rotor are likewise non-uniformly distributed with respect to angle about the rotor’s axis of rotation. Accordingly, for each of the rotor and the stator in such machines, different angles separate at least some locations of peak magnetic flux from adjacent locations of peak magnetic flux about the axis of rotation so that that magnetic flux profile generated by such component is non-uniformly distributed about the axis of rotation.
  • FIG. 8 illustrates a cross section of an example embodiment of an axial flux motor 802 that is configured with components like those shown in FIGS. 5 and 6 and that is integrated with a washing machine load 804 in accordance with some aspects of the present disclosure.
  • a stator segment 208 of the motor 802 may be secured to a housing 806 containing a washing machine tub 808 via an attachment member 510 and one or more fasteners 512, and the washing machine tub 808 may be rotatably couple to the housing 806 via bearing elements 810.
  • a rotor 504 of the motor 802 may directly drive the washing machine tub 808 via a shaft 812 that may extend from and/or be fixedly attached to the washing machine tub 808.
  • continuous rotation at relatively high speed and low torque in“spin” mode may be achieved using the stator segment 208 and a collection of magnets 502 arranged into a dense magnet region 506 and one or more less dense magnet regions 508, as described above in connection with FIGS. 5 and 6.
  • a spin mode due to the non- uniform distribution of the magnetic flux profiles of the rotor and the stator about the rotor’s axis of rotation, as the rotor 504 rotates though a range of angles with respect to the stator segment 208 at a substantially constant speed, the periodicity of the torque produced due to interaction between the magnetic flux generated by the rotor and the stator is irregular.
  • the reversing action needed for“wash” mode may be a relatively low speed, high-torque mode of operation where torque can be supplied at specific angles.
  • the interaction of the stator segment 208 with the dense magnet region 506 may provide the peak torque requirement.
  • a motor or generator may comprise a rotor having an axis of rotation and configured to generate first magnetic flux parallel to the axis of rotation, and a stator configured to generate second magnetic flux parallel to the axis of rotation, wherein at least one of the rotor or the stator is configured to generate a magnetic flux profile that is non-uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in paragraph (Al), and the rotor may be further configured to generate a first magnetic flux profile that is non-uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in paragraph (A2), and the rotor may further comprise one or more magnet segments non-uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in paragraph (A3), and each of the one or more magnet segments may further have a respective surface location at which the first magnetic flux has a maximum density, and the respective surface locations may be non-uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in any of paragraphs (A2) through (A4), and the rotor may be further configured such that, as the rotor rotates though a range of angles with respect to the stator at a substantially constant speed, a periodicity of torque produced due to interaction of the first magnetic flux and the second magnetic flux is irregular.
  • a motor or generator may be configured as described in any of paragraphs (A2) through (A5), and the stator may be further configured to generate a second magnetic flux profile that is non-uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in paragraph (Al), and the stator may be further configured to generate a magnetic flux profile that is non- uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in any of paragraphs (A2) through (A7), and the stator may further comprise one or more printed circuit board segments non-uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in any of paragraphs (A2) through (A8), and the stator may further comprises conductive traces arranged on at least one dielectric layer to generate the second magnetic flux when energized with current.
  • a motor or generator may be configured as described in any of paragraphs (A2) through (A9), and the stator may be further configured such that, at any given time when the conductive traces are energized with current, one or more locations of maximum density of the second magnetic flux are non-uniformly distributed about the axis of rotation.
  • a motor or generator may be configured as described in paragraph (A9) or paragraph (A10), the conductive traces are arranged on the at least one dielectric layer and coupled to a power source to generate three phases of the second magnetic flux corresponding to three phases of current output by the power source.
  • a motor or generator may be configured as described in any of paragraphs (Al) through (Al l), and the stator may be further configured such that, as the rotor rotates though a range of angles with respect to the stator at a constant speed, a periodicity of torque produced due to interaction of the first magnetic flux and the second magnetic flux is irregular.
  • a rotor for use in a motor or generator may comprise a support structure, and one or more magnet segments that are supported by the support structure and that generate first magnetic flux parallel to an axis of rotation about which the support structure rotates when assembled with a stator that generates second magnetic flux parallel to the axis of rotation, wherein the one or more magnet segments are configured and arranged to generate a magnetic flux profile that is non-uniformly distributed about the axis of rotation.
  • a rotor may be configured as described in paragraph A13, and the one or more magnet segments may further include at least a first magnet segment and a second magnet segment spaced apart from the first magnet segment, and the first magnet segment may include a larger number of adjacent magnets than the second magnet segment.
  • a method may comprise arranging one or more magnetic flux producing windings of a stator non-uniformly about an axis of rotation of a rotor of an axial flux motor or generator.
  • (M2) A method may be performed as described in paragraph (Ml), wherein arranging the one or more magnetic flux producing windings further comprises arranging one or more printed circuit board segments including the windings non-uniformly about the axis of rotation.
  • (M3) A method may be performed as described in paragraph (Ml) or paragraph (M2), wherein arranging the one or more printed circuit board segments may further comprise arranging the one or more printed circuit board segments such that, at any given time when the windings are energized with current, one or more locations of maximum density of the second magnetic flux are non-uniformly distributed about the axis of rotation.
  • (M4) A method may be performed as described in any of paragraphs (Ml) through (M3), wherein the rotor may comprise magnets arranged non-uniformly about the axis of rotation.
  • (M5) A method may be performed as described in any of paragraphs (Ml) through (M4), wherein arranging the one or more magnetic flux producing windings may further comprise arranging the one or more magnetic flux producing windings such that, as the rotor rotates though a range of angles with respect to the stator at a constant speed, a periodicity of torque produced due to interaction of magnetic flux generated by the rotor and the stator is irregular.
  • the disclosed aspects may be embodied as a method, of which an example has been provided.
  • the acts performed as part of the method may be ordered in any suitable way. Accordingly, embodiments may be constructed in which acts are performed in an order different than illustrated, which may include performing some acts simultaneously, even though shown as sequential acts in illustrative embodiments.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne un moteur ou un générateur qui comprend un rotor et un stator, le rotor ayant un axe de rotation et étant conçu pour générer un premier flux magnétique parallèle à l'axe de rotation, le stator étant conçu pour générer un second flux magnétique parallèle à l'axe de rotation, et au moins l'un du rotor ou du stator étant conçu pour générer un profil de flux magnétique qui est distribué de manière non uniforme autour de l'axe de rotation. L'invention concerne également un procédé qui consiste à agencer un ou plusieurs enroulements produisant un flux magnétique d'un stator de manière non uniforme autour d'un axe de rotation d'un rotor d'un moteur ou d'un générateur de flux axial.
EP19805848.9A 2018-11-01 2019-10-30 Conception de stator et de rotor pour exigences de couple périodiques Pending EP3874583A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201862754051P 2018-11-01 2018-11-01
US16/665,763 US11527933B2 (en) 2015-10-02 2019-10-28 Stator and rotor design for periodic torque requirements
PCT/US2019/058716 WO2020092470A1 (fr) 2018-11-01 2019-10-30 Conception de stator et de rotor pour exigences de couple périodiques

Publications (1)

Publication Number Publication Date
EP3874583A1 true EP3874583A1 (fr) 2021-09-08

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EP19805848.9A Pending EP3874583A1 (fr) 2018-11-01 2019-10-30 Conception de stator et de rotor pour exigences de couple périodiques

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EP (1) EP3874583A1 (fr)
JP (1) JP2022506263A (fr)
KR (1) KR20210083341A (fr)
AU (2) AU2019370644B2 (fr)
BR (1) BR112021007191A2 (fr)
CA (1) CA3116171A1 (fr)
MX (1) MX2021005147A (fr)
PH (1) PH12021550989A1 (fr)
SG (1) SG11202103655XA (fr)
TW (1) TWI827721B (fr)
WO (1) WO2020092470A1 (fr)

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US11283319B2 (en) 2019-11-11 2022-03-22 Infinitum Electric, Inc. Axial field rotary energy device with PCB stator having interleaved PCBS
US20210218304A1 (en) 2020-01-14 2021-07-15 Infinitum Electric, Inc. Axial field rotary energy device having pcb stator and variable frequency drive
US11482908B1 (en) 2021-04-12 2022-10-25 Infinitum Electric, Inc. System, method and apparatus for direct liquid-cooled axial flux electric machine with PCB stator

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JP2022506263A (ja) 2022-01-17
CA3116171A1 (fr) 2020-05-07
BR112021007191A2 (pt) 2021-07-20
KR20210083341A (ko) 2021-07-06
MX2021005147A (es) 2021-07-15
AU2023258344B2 (en) 2024-02-01
PH12021550989A1 (en) 2021-10-04
WO2020092470A1 (fr) 2020-05-07
AU2023258344A1 (en) 2023-11-16
AU2019370644B2 (en) 2023-11-23
CN112997383A (zh) 2021-06-18
AU2019370644A1 (en) 2021-05-20
TWI827721B (zh) 2024-01-01
SG11202103655XA (en) 2021-05-28
TW202034607A (zh) 2020-09-16

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