WO2015089518A1 - Ventilateur à moteur à flux transversal à efficacité élevée - Google Patents

Ventilateur à moteur à flux transversal à efficacité élevée Download PDF

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Publication number
WO2015089518A1
WO2015089518A1 PCT/US2015/013007 US2015013007W WO2015089518A1 WO 2015089518 A1 WO2015089518 A1 WO 2015089518A1 US 2015013007 W US2015013007 W US 2015013007W WO 2015089518 A1 WO2015089518 A1 WO 2015089518A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
motor
coil
transverse flux
transverse
Prior art date
Application number
PCT/US2015/013007
Other languages
English (en)
Inventor
Thomas F. Janecek
Tyler Williams
Morgan CONKLIN
John Dyer
Original Assignee
Electric Torque Machines 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 US14/101,415 external-priority patent/US9509181B2/en
Priority claimed from US14/259,959 external-priority patent/US9360020B2/en
Application filed by Electric Torque Machines Inc. filed Critical Electric Torque Machines Inc.
Priority to US14/654,823 priority Critical patent/US9618003B2/en
Publication of WO2015089518A1 publication Critical patent/WO2015089518A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/145—Stator cores with salient poles having an annular coil, e.g. of the claw-pole type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H02K21/227—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos having an annular armature coil

Definitions

  • the present invention relates to fans and particularly high efficiency ceiling fans driven by a transverse flux motor.
  • HVAC high volume low speed
  • Electric motors used to drive the HVLS fans have lower efficiency at low speeds and therefore are often times running well below their peak efficiency speeds.
  • the most common ceiling fan motor is a single-phase induction motor ⁇ permanent-split capacitor type) with an externa! rotor.
  • the efficiency of such motors can be improved by increasing the size of (or the quality of steei used in) the stator and rotor stack, improving the lamination design, increasing the cross section of copper wiring, or operating the fan at reduced speed through capacitor speed control
  • induction motors are mounted to the fan blades directly. This configuration is known as direct-drive and means that the fan and motor rotate at the same speed.
  • ceiling fans could attach the fan blades to the motor via a geared mechanism that allows the fan blades to rotate at a different speed than the motor (a technology used in many industrial fans). This would enable higher motor speeds for a given fan RPM, which could increase overall efficiency.
  • BLDC motors are permanent magnet synchronous alternating current (AC) motors driven by a converter plus inverter combination control system. In this configuration, the motor displays characteristics of direct current motors; thus, they are called brushless direct current motors. Because there is no eiectricai current flowing in the rotor of a BLDC motor, there are no rotor energ losses, thereby resulting in greater efficiency. While a typical ceiling fan has an efficiency of about 40 Liters per second per Watt (L/s*W), (88 CF W), fans that have a BLDC motor are capable of efficiency ratings of more than 142L/s * W, (300CFM W).
  • Motors are typically designed for high efficiency, high power density, and low cost, Brushless DC motors require complicated windings that require speciai equipment and add additional manufacturing costs. Most brushless DC motors have relatively few poles, such as four to eight. The complicated winding required limits the number of poles that can practicaiiy be designed into a brushless DC motor. While some motors are generally compiicated in their assembly, so as to achieve higher performance characteristics, a design utilizing fewer components, or a weli-engineered assembly, may provide a superior motor solution at a lower price point. ⁇ 0007 J There exists a need for a fan that is highly efficient, efficient at low speeds, requires less materia!
  • the Invention is directed to fans comprising a transverse flux motor. Any suitable type of fan may be driven b a transverse flux motor, as described herein,
  • a ceiling fan is configured with a high efficiency transverse flux motor.
  • An exemplary fan comprising a transverse flux motor, as described herein, can provide an airflow efficiency of more than about 142L s*W, (300CF /W), more than about 236L/$*W, (SOOCFM/W), or more than about 330L/s * W, (700CFM/ ).
  • a transverse flux motor may require much less raw material than a conventional induction or brushiess DC motor.
  • An exemplary fan comprising an exemplary transverse flux motor, as described herein, can provide an essential airflow density of more than about 1.89 liters per second per grain (l/s*g), ⁇ 4CF /gram), more than about 2,36L/s * g, ⁇ 5 CF /gram) or even more than about 2,S3L/s*g, ⁇ 6 CFM/gram) wherein the fans have blade diameter less than about, 1.83m or 72rn.
  • the essential airflow density is the ratio of the airflow output to the weight of the essentia! motor components that consists of the stator, rotor, coil and in some embodiments the back-iron.
  • a transverse flux motor configured in a fan provides a power densit of about 100 W/kg or more, about 125 W/kg or more, about 150 W/kg, about 200 W/kg or more and any range between and including the power densities provided.
  • the torque magnet and total sfeei densities, or the ratio of the continuous available torque to the mass of the magnet and total motor steel, respectively is significantly higher than those of conventional motors.
  • a "transverse flux motor” may be any electrical motor wherein magnetic flux paths have sections where the flux Is generally transverse to a rotational plane of the motor.
  • the electrical motor may be a pure "transverse" flux motor, in another exemplary embodiment, when a magnet and/or flux concentrating components are on a stator and/or are held stationary as the electrical motor operates, the electrical motor may be a pure "commutated" flux motor.
  • transverse fiux motor may be considered to be a "eommutated flux motor” by fixing the rotor and moving the stator, and vice versa
  • a cot! may be fixed to a stator; alternatively, a coi! may be fixed to a rotor.
  • transverse flux motor will be used to describe a motor that is a pure transverse flux motor and a pure eommutated flux motor or any combination thereof
  • a transverse fiux motor with a high pole count, or number of poles within a singie phase, and low resistance provides efficient power output at Sow speed and thereby enables a direct drive motor, with no gearing, for fan applications and particularly HVLS fans.
  • HVLS fans require a high continuous power output or watts, such as 200 watts or more, 400 watts or more, 600 watts or more, 900 waits or more, or 200 watts or more, for example.
  • a transverse flux motor as described herein, is configured as a direct drive motor to drive a fan, such as an HVLS fan, as it can provide the required power output without the need of additional gearing.
  • the fan blades may be attached directly, or coupled, to the rotor of a transverse fiux motor, as described herein, and the rotor may b configured as an outer rotor,
  • a direct drive motor configuration incorporates a transverse flux motor that drives the fan blades one revolution for every revolution of the motor and requires no gearing.
  • a transverse fiux motor may have any suitable pole count including, but not limited to, about 30 or more, about 50 or more, about 70 or more, about 100 or more, about 120 or more and any range between and including the pole counts listed.
  • a transverse flux motor, as described herein, does not require the complicated winding configuration of other motor types and therefore higher pole counts are more easil produced and produced at a lower manufacturing cost.
  • Another important metric for an electric motor is the ratio of the continuous torque versus the volume of the motor, or volumetric torque density. As shown in FIG. 38, transverse flux motors have a much higher volumetric torque density than conventional brush less DC motors. The increase is on the order of three to six times.
  • Continuous torque is defined as the amount of torque a motor can produce without any su plemental cooling and in one embodiment includes only conventionally air cooled motors and excludes water cooled motors.
  • a standard metric for determining maximum continuous torque is the amount of torque produced by a motor in a 40°C environment wherein the motor case remains below 80*0. Many motors have a high peak power output but would overheat and fail if operated at or near the peak power output level for too long.
  • Transverse flux motors are capable of providing a high continuous torque, or power output, without overheating as conventional motors often do.
  • the volume of the motor as used in the volumetric torque density metric is defined in one embodiment as the volume of the electro- active motor components, or the components of the motor that produce torque including the rotor, stator and coil, in another embodiment, the volume of the motor is defined as the essential components of the motor, including the stator, the rotor, and the coil. Any suitable method of measuring the motor volume may be used, including water displacement. As can be seen in FIG.
  • a transverse flux motor having a volume of approximately 2800cm 3 produces a continuous torque of more than 80N-m, which is more than four times greater the continuous torque produced by a simiiariy sized BLDC motor.
  • a transverse flux motor, as described herein, may have a volumetri torque density of about 0,006N-m/cm J or more, about 0.01 N-m/cm 3 or more, about 0.02N-m cm 3 or more, about 0.03N-m/cm 3 or more, and any range between and including the values provided.
  • This high continuous torque output enables a transverse flux motor to be configured as a directed drive motor fo a fan, wherein no additional gearing is required to drive the fan blades.
  • the fan hiades may be attached directiy to or otherwise coupled to the rotor wherein one revolution of the rotor spins the fan blades one revolution
  • the transvers flux motors are capable of providing a continuous power output, or watts of power without overheating as conventional motors often do.
  • Continuous power output, or continuous watts as used herein means that the motor can run essentially non-stop at the indicated continuous output level with no supplemental cooling.
  • Many motors have a high peak power output but would overheat and fai! if run at o near the peak power output level for too iong.
  • a transverse flux motor, as described herein may be configured to produce continuous output power of about 200 watts or more, about 400 watts or more, about 800 waits or more and any range between and including the continuous power output levels described.
  • An essentially continuous power density is the ratio of the continuous power output to the weight of the essential motor components, as described herein.
  • a transverse flux motor, as described herein may produce at least 200 continuous watts of torque, or at least 400 continuous watts of torque or at last 600 continuous watts of torque,
  • the fan is a ceiling fan or a nonportable device that is suspended from a ceiling for circufating air via the rotation of fan blades.
  • a ceiling fan may be a high volume Sow speed, HVLS, fan that comprises relatively long fan blades that rotate at a relatively low speed.
  • HVLS fan generally has a fan blade diameter in excess of 2,1m ⁇ 7ft ⁇ and may have a diameter in excess of 3.0m (10ft), 4.6m (15ft) or 6,1m (20ft) and any range between the fan blade diameters listed.
  • a HVLS fan may be configured to rotate at relatively Sow speeds between 50 revolutions per minute (rpm) and generally no more than lOOrpm.
  • a fan, as described herein is a residential ceiling fan that has a biade diameter of no more than 1 ,83m (72in), it is to be understood that a residential fan, as described herein, may be implemented in many- locations and environments other than a residence and this term is merely used for convenience.
  • a fan is an electronic enclosure cooling fan and ma be configured within an electronic device, such as a computer, or server, for example.
  • a fan as described herein, is configured to ventilate an enclosure that may comprise one or more electronic devices.
  • the fan may be configured externa! to the electronic devices, such as servers and processors, for example.
  • a fan, as described herein, may be used fo move any type of fiuid, such as air, water, coolant, or any type of liquid,
  • an electrical motor includes a rotor for rotation about a rotational axis, a coif arranged circumferenfiaiiy with respect to and encircling the rotational axis, and a stator assembly.
  • an electric motor as described herein is configured with the rotor located radially inward from the stator assembly.
  • the stator assembly includes a lamina structure comprising a stem portion and a plurality of radially extending members integral therewith.
  • the extending members may be configured to form a plurality of opposing extending members about the coil
  • a first sef of extending members may be configured on a first side of the coil and the second set of extending members may be configured on a second and opposing side of the coil.
  • the extending members may be configured in an alternating configuration with a first extending member configured on a first side of the coil and the two adjacent extending members configured on the second side of the coil.
  • the electrical motor may be a transverse flux motor or a commuiated flux motor.
  • a lamina structure may be ring shaped having a generally planar
  • a ring shaped iamina may be a unitary piece of materia! wherein radiaiiy extending members have a bent configuration to accommodate placement of a coii between a first side and a second side.
  • a fan comprises a transverse flux motor that comprises a unique stato assembly having a ring shaped iamina structure.
  • the ring shaped iamina structure comprises a stern portion and a plurality of radiaiiy extending members integral with said stem portion and configured to form a plurality of opposing extending members about a coil.
  • the iamina may be a p!anar piece of material such a meta! sheet and in an exemplary embodiment the iamina is a unitary piece of materia!, wherein the plurality of radiaiiy extending members alternate from one side of a coil to an opposing side of a coii.
  • a lamina may be stamped from a singie sheet of materia! that is planar and the extending members may be formed, such as by bending, to configure the extending members on either side of a coii, in another embodiment, the ring shaped iamina structure comprises two lamina that are magnetically coupled together over the stem portion.
  • the ring shaped Iamina structure as described herein eliminates the need for a return eiement and therefore reduces cost, reduces weight, and reduces magnetic fiux losses.
  • a transverse fiux motor comprising a ring shaped Iamina stator may be configured with the plurality of radially extending members extending out from an inner stem portion or in from an outer stem portion, in one embodiment, the fan biades are directly coupled with an outer rotating rotor of a transverse fiux motor. In another embodiment, the fan biades are coupied to the stator and the rotor is configured within the ring shaped rotor.
  • a iamina structure such as a ring shape iamina may comprise one or more electrical segmentations.
  • An electrical segmentation may be a gap cut, or slit in the lamina that extends between two adjoining radiaiiy extending members and substantially through a magnetic fiux path portion of the stem portion.
  • An electrical segmentation gap will substantially reduce eddy currents.
  • Extending members may be bent at their extended ends to form a tooth, in another embodiment, a separate tooth may be coupled with an extended end of an extending member.
  • a powdered metal tooth may be attached to the extended end of extending members.
  • a tooth formed from a bent portion of the extended end of the extended member may be configured substantially perpendicular to the extending member and alternating teeth may form a coil channel
  • a coii may be located and retained within a coii channel
  • the tooth, or extended ends of a stator may be configured with a coil space, or space between opposing siator teeth, that is large enough to allow insertion of a coil therethrough, in an exemplary embodiment, a coil space is formed in the rotational axis between a first and second set of teeth, whereby the coil space is configured for placement of a coil into a coii channel through said coil space.
  • the siator teeth may be configured to extend at least partially over a coii that is located within a coii channel in an exemplary embodiment, a coii in inserted into a coil channel through a coif space and subsequently the coil space is reduced by pressing the two opposing teeth toward each other.
  • a lamina, and more particularly the configuration of teeth may be configured to hay ⁇ a phase offset.
  • a first tooth and an adjacent second stator tooth in a first set of stator teeth may be separated, center to center, by a first angular distance, wherein one or more remaining stator teeth in the first set of stator teeth are each separated, center to center, by a second angular distance.
  • the second angular distance being different from the first angular distance, and wherein the first angular distance is computed with a phase offset computed as a fraction of an even distribution angular distance of the first set of stator teeth.
  • a tooth may include one or more hood portions coupling sides of the head portion to the planar portion.
  • the hood portions may be sloped or may have an angled configuration, or may include a combination of slopes and angles.
  • An electrical motor as described herein, may have such low losses that an aluminum coil may be used instead of traditional copper and thereby provide a lower cost motor.
  • An electric motor as described herein, may be a singie phase or multi-phase motor.
  • a plurality of ring shaped lamina structures may be stacked adjacent to each other to form a three-phase motor, for example.
  • An electric motor may comprise one or more flexible magnets
  • a back iron comprises a flexible magnet and this flexible magnet may be configured radially outward around the stator.
  • an electric motor as described herein, comprises a motor housing and a back-iron magnei is coupled with the housing,
  • Figure 1 A illustrates an exemplary commutated flux machine in accordance with an exemplary embodiment
  • Figure 18 illustrates an exemplary commutated flux machine in accordance with an exemplary embodiment:
  • Figure 2A illustrates an exemplary axial gap configuration in accordance with an exemplary embodiment
  • Figure 28 illustrates an exemplary radial gap configuration i accordance with an exemplar embodiment
  • Figure 3A illustrates an exemplary cavity engaged configuration in accordance with an exemplary embodiment
  • Figure 38 illustrates an exemplary face engaged configuration in accordance with an exemplary embodiment
  • Figure 3C illustrates an exemplary face engaged transverse flux configuration in accordance with an exemplary embodiment
  • Figure 4 illustrates an embodiment of a transverse flux staior of the present disclosure
  • Figure 5 illustrates a reduced sectional view of the staior of Figure 4 during an assembly thereof
  • Figure 6 illustrates a sectional view of the stator of Figure 4
  • Figure 7 illustrates an embodiment of a stator formed from a plurality of the stators of Figure 4;
  • Figure 8 illustrates an embodiment of a partially assembled stator configured for use with an inner rotor to be positioned therein;
  • FIGS 9A and 98 illustrate reduced perspective views of stators formed lamina that utiiize folding inner material to the outer portion of the lamina;
  • Figure 10 illustrates an embodiment of a stator formed from a plurality of lamina stacked adjacent to one another, having an outer rotator configuration
  • FIG. 11 illustrates a cross sectional view of the stator of Figure 10
  • Figure 12 illustrates another embodiment of a stator formed from a plurality of lamina staked adjacent to one another, having an inner rotator configuration
  • Figure 13 illustrates another embodiment of a staior of the present disclosure, utilizing a pair of lamina to surround a coil therein;
  • Figure 4 illustrates a cross sectional view of the staior of Figure 13
  • Figures 5A and 15B illustrate cross sectional and assembled views of stators of the present disclosure, formed utilising a pair of lamina to surround a coil, where the stator may be stacked adjacent to other stators to build a larger stator assembly;
  • Figure 16 illustrates an embodiment of a portion of a lamina configured to improve flux paths therein.
  • Figures 17 illustrates an exemplary three-phase motor configuration having three lamina stacked next to each other.
  • Figure 18 shows an exemp!ary three-phase stator assembly.
  • Figure 19 shows the exemplary three-phase stator assembly of FIG- 18 configured within the rotor
  • Figure 20 shows a cross-sectional view of an exemplary high efficiency transverse flux motor fan.
  • Figure 21 shows a perspective view of an exemplary residential ceiling fan
  • Figure 22 shows a side view of an exemplary HVLS fan.
  • Figures 23 to 28 show graphs of the mass of motor components as described in Example 1 .
  • Figures 27-29 show graph of motor component mass to torque ratios, as described in Example 1 .
  • Figure 30 shows a table of motor component mass and size as described in Example 1.
  • Figure 31 shows a table of motor power and CFIV1 output, as described in Example 1
  • Figure 32 shows a table of motor power requirements and power output, as described in Example 1.
  • Figure 33 shows a table of moto component mass to motor torque, as described in Example 1 ,
  • Figure 34 shows the modeled torque versus RPfvl for a ceiling fan driven by an exemplar transverse flux motor.
  • the terms “comprises,” “comprising;' “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion.
  • a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may Include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • use of "a” or “an” are employed to describe elements and components described herein. This is done merely for convenience and to give s general sense of the scope of the invention. This description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is meant otherwise.
  • an electrical machine for example a transverse flux machine (TFiVI) 100A, generally comprises a rotor 150A, a siator 1 10A, and a coil 120A.
  • Trie rotor 150A comprises a plurality of interleaved magnets 154 and flux concentrators 152, also referred to as a pole.
  • the rotor 150A is configured to interact with stator 1 1D in order to facilitate switching of magnetic flux
  • Siator 11 OA is configured to be magnetically coupled to rotor 150A, and is configured to facilitate flow of magnetic flux via interaction wit rotor 150A.
  • Siator 1 1 OA at least partially encloses coil 120A.
  • Coil 120A is configured to generate a current output responsive to flux switching and/or accept a current input configured to drive rotor ⁇ 50 ⁇ .
  • Transverse flux machine 100A may also comprise various structural components, for example components configured to facilitate operation of transverse flux machine 100A.
  • transverse flux machine 100A may comprise any suitable components configured to support, guide, modify, and/or otherwise manage and/or control operation of transverse flux machine 00A and/or components thereof,
  • an electrical machine for example a commutated flux machine 100B, generally comprises a stator 108, a rotor 150B, and a coil 120B.
  • Stator 1 10B comprises a plurality of interleaved magnets 114 and flux concentrators 112.
  • Stator 0B at least partially encloses coil 1208,
  • Stator 110B is configured to interact wit rotor 1508 in order to facilitate switching of magnetic flux,
  • Stato 110B is configured to be magnetically coupled to rotor 150B, and is configured to facilitate flow of magnetic flux via interaction with rotor 1508.
  • Coil 120B is configured to generate a current output responsive to flux switching and/or accept a curren input configured to drive rotor 150B.
  • Commutated flux machine 100B may also compris various structural components, for example components configured to facilitate operation of commutated flux machine 100B.
  • commutated flux machine 100B may comprise any suitable components configured to support, guide, modify, and/or otherwise manage and/o control operation of commutated flux machine 1008 and/or components thereof.
  • transverse flux machines and/or commutated flux machines may be configured in multiple ways, For example, with reference to Figure 2A. a commutated flux machine may be configured with a stator 210 at ieasf partially surrounding a coil 220 and generaliy aligned with the rotational plane of a rotor 250. Such a configuration is referred to herein as "axiai gap.” In another configuration, with reference to Figure 2B. a commutated flux machine may be configured with stator 210 rotated about 90 degrees with respect to the rotational plane of rotor 250. Such a configuration is referred to herein as "radial gap.”
  • a flux concentrator 352 in a commutated flux machine may engage a stator 310 at least partially surrounding a coil 320 by extending at least partially into a cavity defined by stator 310. Such a configuration is referred to herein as "cavity engaged.”
  • flux concentrator 352 in a eommutated flu machine may engage stator 310 by ciose!y approaching two terminal faces of stator 310.
  • a transverse flux machine 300 comprises a coil 320 at least partially surrounded by stator 310.
  • Stator 310 is face engaged with rotor 350 in an axiai gap configuration.
  • a stator for an electrical machine such as a transverse fiux machine and/or
  • lamina may comprise a lamination stack (e.g., a plurality of lamina) formed from a generally planar material configured to transmit magnetic flux.
  • lamina may be in a shape configured to facilitate transmission of magnetic flux in a desired manner and/or direction, in an embodiment, the !amina may be assembled side by side into the lamination stack ⁇ e.g., as side laminations).
  • lamina may comprise a generally ring-shaped structure. It may be appreciated that the ring shaped structure may be arcuate, polygonal, a combination thereof, or of any other appropriate shape or configuration.
  • lamina may be configured with one or more teeth.
  • teeth are located on the outer edge of the lamina and/or on the inner edge of the side lamination.
  • teeth may be disposed to generally face the radial interior of the ring (for example, in connection with the use of an "inner” rotor in a radial gap configuration), the radia! exterior of the ring (for example, in connection with the use of an "outer" rotor in a radial gap configuration), and/or an axial side
  • the lamina typically comprise a materia! suitable for transmission of magnetic flux.
  • lamina may comprise silicon steel, !n an exemplary embodiment, the lamina may comprise M19 silicon steel.
  • Lamina may also comprise cold rolled grain oriented ("CRGO") silicon steel, nickel-based alloys (e.g.. Carpenter brand high- permeability "49" alloy and/or the like), cobalt-based alloys (e.g., Carpenter brand "Hiperco” cobalt-based materials and/or the like), nickel-cobalt alloys, and/or the like.
  • lamina may comprise any suitable material having a desired electrical resistivity and/or magnetic permeability.
  • the lamina may include one or more cuts o gaps, therein, which may extend completely through the side lamination, breaking the electricai circuit.
  • the lamina may be formed from spaced segments that are circumferentially arranged to form a generally ring-shaped structure in a transverse flux machine. Each segment may be partially electrically and/or physically separated from one another, either by cutting a generally ring-shaped lamina into segments, or forming the generally ring-shaped lamina from segments.
  • Figure 4 illustrates a transverse flux stator 400 formed with a single lamina 410 such as a sheet of metal including silicon steel or another suitable materia! having a desired electrical resistivity and/or magnetic permeability, including but not limited to those materials described above.
  • the single lamina 410 may be formed from a single piece of stamped steel.
  • the single lamina 410 may have various geometric configurations in various embodiments, facilitating a variety of motors based thereon.
  • multiple lamina 410 may be formed simultaneously.
  • the multiple lamina 410 may be formed by placing multiple sheets of lamination materia!
  • the single lamina 410 may initially be formed
  • annular lamina having an Inner portion 420 and an outer portion 430 relative to a central axis A.
  • the centra! axis A may be an axis of rotation for the rotor associated with the transverse flux stator 400 (not shown in Figure 4).
  • radial cuts into one or more of the inner portion 420 and the outer portion 430 may be utilized to form opposing pairs of teeth (e.g., terminal protruding portions of stator material) and associated flux paths.
  • the outer portion 430 of the single lamina 410 is cut or otherwise formed (such as in the stamping process) with a plurality of gaps 440 defining a plurality of radially extending members 450 which may form the teeth.
  • the members 450 extend radially relative to the axis of rotation of the rotor in the illustrated embodiment, it may be appreciated that in some embodiments the members of the single iamina 410 may be configured to extend along the axis of rotation, e.g., for a radial gap configuration of stator.
  • gaps 440 are generally linear, in other embodiments, the gaps 440 may have a curved or angled configuration. As shown in Figure 4, adjacent
  • I S radially extending members 450 may be bent or otherwise angled in opposing axia!
  • angles of the radialiy extending members 450 are alternated so that every other radialiy extending member 450 is on each axiai side of the space for receiving coil assembly 460.
  • each of adjacent radialiy extending members 450 may be bent to form the space
  • alternate ones of the extending members 450 may be bent, whiie others alternate ones of the extending members 450 may be generally planar with the uncut portion of the single lamina 410
  • the single lamina 410 may include a stem portion 470 from which the radialiy extending members 450 may extend radially from and at least some of which may protrude axiaily outwards relative to the axis A to define the vo!ume of the space to receive the coil assembly 460.
  • each of the radially extending members 450 may be bent away from a space therebetween thai may house the coil assembly 460.
  • the coii assembly 460 may comprise elements or assemblies configured to selectively generate electromagnetic forces in the lamina 410, and may include structures appurtenant thereto.
  • a coil channel 480 may be placed in the space between the radially extending members 450, and a coil 490 may be wound around the transverse flux stator 400 within the coil channel 480 to form the coil assembly 460.
  • the coil 480 alone, or other configuration of coii assembly 460, may be positioned within the space between the radially extending members 450 directly.
  • the coii channel 480 may be formed from one or more pieces which may form a groove into which the coil 490 may be wound into.
  • the coil channel 480 may be formed from one or more pieces of insulating materia! (e.g., plastic, such as formed nylon, or another polymer), which may be secured together ⁇ e.g., via pins, snaps, vveids, adhesive, or other securements) to form an annular channel into which the coii 490 may wind.
  • the application of electric current to the coil in the coil assembly 460 may generate flux fields in the lamina 410 causing rotation of the rotor.
  • the ⁇ application of a moving/variable magnetic force to the transverse flux stater 400 may generate an electric current in the coii of the coil assembly 460 (e.g., in the context of a generator).
  • FIG. 6 which illustrates a cross sectional view of the transverse flux stator 400 from Figure 4, in an embodiment the radially extending members 450 may be bent close to the coil assembly 460 (e.g.. after it is placed in the space, or bent initially to form a close configuration of the space, with the coil assembly 460 installed therein), in an embodiment, heads 500 of the radially extending members 450 may interleave with one anothe to form flux concentrating teeth which may surround the coii assembly 460 therein.
  • stator 400 forms desired flux paths when the coil assembly 460 is activated ⁇ e.g., through electromagnetic processes, with electric current passing through the coil 490 in the illustrated embodiment), it may be appreciated that the radially extending members 450 may be angled or positioned relative to one another to form the desired flux paths (including but not limited to forming a polyphase configuration, implementing a phase offset, or so on).
  • Figure 7 illustrates a perspective view of a multiphase stator assembly 510 formed from a plurality of the transverse flux staiors 400 positioned adjacent to one another along the axis A. If may be appreciated that fhe plurality of transverse flux stators 400 in the stator assembly 510 may be utilized in conjunction with an associated rotor assembled concentric thereto. St may be appreciated that in an embodiment the power of the motor may be scalable through use of additional transverse flux stators 400 in the stator assembly 510, utilizing a common rotor.
  • transverse flux stator configured as an inner stator that would he utilized with an exterior rotor, or outer rotor configuration to surround and rotate about the inner stator, if may be appreciated that in some embodiments the teachings herein may be utilized to construct a transverse flux stator configured to be utilized as an exterio stator for use with an inferior rotor configured to rotate within the exterior stator.
  • a transverse fiux stator 520 configured to be utilized with an Interior rotor may be formed from a strip of staior material 530 which may be cut, die pressed, or otherwise formed in an elongated manner configured to form a plurality of radially extending members 540, As shown, the radially extending members 540 may protrude from a connecting portion 550. As shown, the strip of staior material 530 may be wound around a coil assembl 560, which may be positioned within a channel defined by opposing radially extending members 540 on opposite sides of the connecting portion 550.
  • the coil assembl 580 may be similar in configuration to the coil assembly 460, and may comprise a coil, which may b wound within a coil channel. It may be appreciated that in some embodiments the coil ma be of a unitary construction around which the strip of stator materia! 530 is positioned. In an embodiment where the coil assembly 560 comprises a coil channel, the coii channel may itself be of a unitary construction.
  • the connecting portion 550 may be formed with thinner regions 570 thereon ⁇ e.g.. pressed to a reduced thickness, or containing perforations) configured to facilitate wrapping the strip of stator material 530 around the coii assembly 560,
  • head portions may be formed on the radially extending members 540, similar to the head portions 500, which may be folded inward over the coif assembly 560, creating flux concentrating teeth that may interleave with one another to secure the strip of stator material 530 around the coil assembly 560, and form desired f!ux paths when the coil assembly 560 is activated (e.g., current is passed through the coil), to engage the inner rotor associated with the transverse flux stator 520.
  • each radially extending member 540 may be utilized to form the desired flux path for the transverse flux stator 520.
  • the connecting portion 550 or the radiaiiy extending members 540 may be angled or positioned relative to one another to form the desired flux paths ⁇ including but not iimited to forming a polyphase configuration, implementing a phase offset, or so on).
  • the embodiment of Figure 8 illustrates the transverse flux stator 520 being formed from a strip of stator material 530, it may be appreciated that in an embodiment, the transverse flux stator 520, being configured for use wit an inner rotator, may be formed from a stamped lamination having a annular configuration with cuts or gaps formed in the inner portion of the annulus to form radially extending members extending in alternating axial directions to form the opposing pairs of teeth and associated flux paths, in some
  • segments of the inner portion of a single lamina may he cut (e.g., as part of a press stamping process, or otherwise) and folded towards the outer portion of the single lamina to form an annulus configuration.
  • Figure 9A illustrates a reduced sectiona! perspective view of an embodiment of a transverse flux motor 580 with segments of a stator 590 and an associated rotor 600 shown therein.
  • the stator 590 may be formed from a single lamina 6 0 shaped by cutting (or otherwise forming) an annulus having an outer portion 820 and an inner portion 630, wherein the outer portion 620 is dent outwards to form a space for a coil assembiy 640, which may be similar to the coil assemblies 480 and 580, as described above, As shown in the illustrated embodiment, however, segments from the inner portion 630 may be folded outwards over the outer portion 820, to increase the available flux path area. Specifically, by folding the inner lamination material from the inner portion 630 alongside the outer portion 620, the size of the flux path may be increased.
  • a transverse flux stator 650 may be configured as shaped from a single lamina 660, by cutting (or otherwise forming) an annulus having an outer portion 670 and an inner portion 680, wherein the outer portion 670 is bent outwards to form a space for a coii assembly 690, which may be similar to the coil assemblies 460 and 560, as described above.
  • segments of the inner portion 680 may be folded towards the outer portion 670, and may align adjacent to the outer portion 670 to increase the available flux path area, in a manner that would not increase the thickness of the transverse fiux stator 650 [0084] in some embodiments, the single lamina forming both opposing pairs of teeth may be stacked with other iamina that also form both opposing pairs of teeth, to provide additional cross-sectional area for the flu channel.
  • Figures 10 and 11 illustrate a transverse flux stator 700 formed from a plurality of lamina 710 (individually iamina 710a-g), each of which is configured to surround a coil assembly 720, and form the opposing pairs of teeth for the transverse flux stator 700.
  • the coil assembly 720 may be similar to the coii assemblies 460 and 560 described above.
  • a reduced view of a portion of a rotor 730 is aiso depicted, it may be appreciated that in an embodiment each iamina 710 may be formed similarly to the single iamina 410, however in a manner configured for stacking of the Iamina 710 adjacent to one another.
  • each radially extending member 740 of the may be iamina 710 may be spaced relative to one another to facilitate the stacking.
  • certain of the iamina 710 may be different from other of the iamina 710, such as at the radially extending members 740 thereof, to facilitate the stacking of the iamina 710 (e.g. , with the radially extending members 740 protruding outwards further than others of the radially extending members to facilitate proper positioning relative to one another, or to create appropriate space for the coil assembly 720).
  • the outermost layered tips of the radially extending members 740 of the lamina 710 may together face the rotor 730, and serve as the face of a tooth of the transverse flux stator 700.
  • an embodiment of the transverse flux siator 700 (as transverse flux siator 700*) formed from a plurality of the iamina 710 (as iamina 710*) may have an inner rotor stator configuration.
  • a partial view of a rotor 730 * configured to rotate within the transverse flux stator 700 * is aiso illustrated, in this embodiment, the lamina 710 has a stem potion 470 that is configured radially outside of the inwardly radially extending members 740.
  • Other variations of transverse flux stato 700 are aiso possible in other embodiments,
  • the single piece lamina comprises opposing pairs of teeth and associated flux paths (e.g., the unitary body is configured to surround both sides of the coii), it may be appreciated that in other embodiments the stator may comprise a pair of lamina, which when assembled together are configured to sandwich the coil therebetween
  • Figures 13 and 14 illustrate a transverse flux stator 750 formed from a first lamina 760 and a second lamina 770, which togethe are configured to surround a coii 780, and form the opposing pairs of teeth for the transverse flux stator 750.
  • a reduced view of a portion of a rotor 790 is aiso depicted, it may be appreciated that in an embodiment each iamina 780 and 770 may be formed similarly to the iamina 410, however in a manner configured for assembly together around the coil 780.
  • each iamina 760 and 770 may include radially extending members 800, which may be bent or otherwise formed to extend in an axial direction parallel to the axis of rotation A for the rotor 790, and thus may envelop the cos! 780, as shown.
  • each of the lamina 780 and 770 may inciude features configured to secure the lamina 760 to the lamina 770, or otherwise position the lamina 760 relative to the lamina 770 for assembly into the transverse fiux stator 750.
  • the iamina 780 includes embossing 810 that extends into apertures 820 in the larnina 770, which may align and/or snap the !amina 760 to the Iamina 770. in an
  • the embossing 810 and apertures 820 may be outside of the desired flux paths, to prevent undesirable eddy currents or current/fiux paths associated therewith.
  • Other mechanisms to secure the iamina 760 to the iamina 770 are also possible in various embodiments, including but not limited to tack or spot welds, pins, snaps, adhesive, or other securements.
  • Lamina 760 and 770 may be attached or secured together in the stem portion 470 to provide a magnetic flux path between the two separate and distinct lamina. As shown in Figure 13, the ring shaped Iamina comprises an aperture 836.
  • Figures 5A-B illustrates another embodiment of a transverse fiux stator comprising a pair of Iamina surrounding a coi!, which may be scalable to provide a desired performance.
  • Figure 15A illustrates a transverse fiux stator 830 comprising a Iamina 840 and a lamina 850, which may together surround a coil 860.
  • the coil 860 may be formed by wrapping electrically conductive wire within a space formed by the combination of the Iamina 840 and the Iamina 850, As further shown, in an embodiment one or more of the iamina 840 and/or the iamina 850 may be configured to form segments 870 comprising groups of radially extending segments 880 associated with that iamina. As shown in Figure 15A, the stator comprises a iamina comprising two separate iamina that are coup!ed together in the stem portion 888.
  • the segmentation gap 872 in the iamina 840 separates the first segment 870' f om the second segment 870 and extends partially into the stem portion 888, as shown in Figure 15A,
  • An electrical segmentation gap may be gap in the lamina including a cut away portion o slit.
  • a segmentation gap extends down into the stem portion through a magnetic flux path portion 889 of the stem portion, as indicated b the bold arrow in Figure 15 A.
  • An electrical segmentation gap will substantially reduce eddy currents.
  • a plurality of the transverse fiux stators 830 may be stacked together to form a multi-phase high performance transverse flux sfafor 890,
  • radially extending members of the stators may be formed by creating gaps between each of the radially extending members, and bending at least a portion of a head of the radially extending member.
  • the bent heads may be folded axiai!y inwards to form alternating heads, which may extend over the coil, and create flux concentrating teeth interleaved with one another to create desired flux paths and flux switches. Examples of such embodiments are iilustrated as with the head portions 500 of transverse flux stator 400, or with the head portions of the radially extending members 800 or 880 illustrated in the assemblies of transverse flux slafors 750 and 830,
  • the lamina may be constructed through other mechanisms which may create angled or sloped configurations of the head portions of the radially extending members, which may provide an improved flu path from an outermost exterior surface of the head portion to the remainder of the iamina.
  • Figure 16 illustrates a radiall extending member 900 which may be integral to other radially extending members on a lamina of a transverse flux stator.
  • the lamina comprising the radially extending member 900 may be formed utilizing a progressive die press process.
  • the iamina may be formed through a casting process.
  • the radially extending member 900 may have a planar portion 910 which may extend radially from an axis of rotation for a rotor associated with the transverse flux stator,
  • a head portion 920 ma extend generally axiaiiy relative to the axis of rotation, similarly to the head portions of other embodiments described herein.
  • the radially extending member 900 may include one or more hood portions 930 coupling sides of the head portion 920 to the pianar portion 910.
  • the hood portions 930 may be sloped, in other embodiments, the hood portions may have an angled configuration, or may included a combination of slopes and angles, to extend from the sides of the head portion 920 to the planar portion 910.
  • the head portion 920 adjacent to the planar portion 910 may itself have an angled or sloped configuration, such that at least a portion of the head portion 920 slopes or angles towards the pianar portion 910, without forming a direct right angle turn from the planar portion 910 to the head portion 920.
  • the head portion 920 may have a plurality of facets associated therewith, and may itself taper inwards, as show in the embodiment of Figure 16. It may be appreciated that in an embodiment the radially extending member 900 having the head portions 920 may facilitate flux collection in the air gap between adjacent radially extending members 900.
  • a stator 830 for a three phase motor comprises three separate iamina that are stack adjacent to each other.
  • Each of the ring shaped iamina 855 to 855" are made out of a unitary piece of material wherein the extending members 880 extend to either side of the col! assembly 460.
  • Two poles 581 and 581 ' are shown configured radially out from the stator.
  • a stator assembly 835 fo a three phase motor comprises three individual stators that are stacked adjacent to each other. Each of the three stators comprises a ring shaped Iamina 855 to 855".
  • the stator assembly 835, shown in Figure 18 is configured within a rotor 790.
  • the rotor 790 extends circumferentiai!y around the stator and is contained with a fan housing 865.
  • a back iron 885 comprises a flexible magnet that also extends circumferentially around the rotor.
  • the transverse fiux motor 925 is an integral part of the fan housing 865. whereby a portion of the transverse flux motor is attached to the fan housing.
  • the transverse fiux motor 580 has 48 poies 581 per phase.
  • a high efficiency transverse f!ux motor fan 995 comprises a three-phase transverse flux motor 935.
  • the stator assembl 835 comprises three ring shaped lamina 855 having an aperture 836.
  • a mounting rod 22 extends through the aperture and a pair of bearings allows the fan housing 865, attached to the rotor 790, to spin as the rotor is spun by the transverse flux motor.
  • the motor is therefore a direct drive motor, wherein one revolution of the motor creates one revolution of the fan blades.
  • the fan is configured with a direct drive motor and has no gearing between the motor and the fan blades.
  • the ceiling fan is mounted to a ceiling 17 and the fan blades 74 are coupled to the fan housing 865.
  • the controller 40 and power supply 42 are configured within the fan housing but could be configured external to the housing.
  • a back-iron 885 is configured In the fan housing and extends circumferentiai!y around the rotor.
  • FIG. 21 shows a perspective view of an exemplary residential ceiling fan 915 having four fan b!ades 74 and a transvers fiux motor configured within the fan housing 865.
  • the transverse flux motor may enable the residential ceiling fan to meet any one of the standards for, high efficiency as described herein, including, airflow density, power density and/or airflow efficiency.
  • the transverse flux motor may be an outer rotor configuration and the rotor may be attached to the fan housing 865, thereby providing a direct drive motor configuration wherein the fan blades are coupled with the rotor.
  • Figure 22 shows a side view of an exemplary HVLS fan 985 that comprises a transvers fiux motor within the fan housing 865, as described herein.
  • the biade diameter 36 or diameter of the circle created by the extended end of a fan biade as the biade rotates, may more than 2.1 m (7 ft).
  • the HVLS fan 985 is configured in a warehouse,
  • stator and rotor may be utilized in forming a motor or a generator.
  • the rotor may vary across embodiments, and in some embodiments may comprise rubberized or otherwise flexible magnets assembled in an annular configuration to surround or be received within the stator (in inner rotator or outer rotator stator
  • a particular transverse flux machine and/or commutated flux machine may incorporate use of segmented stator laminations, use of rainbow-iike back return laminations, use of a dual wound coil, use of a lamination stack with powdered metal teeth, use of a sixih- hase offset, use of extended magnets, use of an overhung rotor, use of stator tooth overlap, use of a tape wound rotor, use of a muittpath rotor, use of a partial stator, use of a polyphase design, and/or the like. All such combinations, permutations, and/or other interrelationships are considered to be within the scope of the present disclosure.
  • the terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, articie, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, articie, or apparatus.
  • the terms “coupled,” “coupling,” or any other variation thereof, are intended to cover a physical connection, an electrical connection, a magnetic connection, an optical connection, a communicative connection, a functional connection, and/or any other connection.
  • a comparative analysis was conducted of commercially available residential ceiling fans and a residential ceiling fan configured with a transverse flux motor as described herein.
  • the motors for eac of the fans was disassembled and the components were weighed and measured.
  • the fans were operated at both airflow rates and power metrics were measured and recorded.
  • the transverse flux motor was a three phase, 48 pole count outer rotor motor as generally shown in FIGS. 17-19.
  • the transverse fiux motor was configured with a unitary ring shaped lamina 855 as shown in FiG. 17.
  • BLOC bassh!ess DC
  • AC induction motor The three BLDC motors evaluated included, Craftmade, model Hathaway (8LDC1 ) having a 52 inch, ⁇ 1.3m) blade diameter, Harbor Breeze, model Kingsbury (BLPC2) having a 70 inch, (1.8m) blade diameter, and Craftmade, model Olivier (BLDC3), having a 70 inch, (1.8m) blade diameter.
  • Figure 30 shows a table of motor component mass and size.
  • the phase resistance is also provided in Figure 30.
  • the phase resistance of the transverse flux motor, Example 1 was only 4.6ohms, compared with the next lowest being 14ohms for the Olivier motor, or BLDC 1.
  • the total essentia! mass for each motor is provided in the fast ro and is the sum of the copper, magnet and totai motor steel mass.
  • the total motor steel mass includes the stater iron mass and back iron mass,
  • Figure 31 shows a table of motor power and CFM output, as described in Example 1.
  • Figure 32 shows a table of motor power requirements and power output.
  • the transverse fiux motor of Example 1 has an equivalent power output with a much lower re uired: power supply.
  • the transverse flux motor is more efficient at converting input power into power output
  • the continuous available torque provided by the transverse fiux motor was equivalent to the BLDC motors and double that of the induction motor.
  • Figure 33 shows a table of motor component mass to motor torque.
  • the transverse flux motor required much less essential motor mass per torque output.
  • a lighter weight motor in a fan, and particularly a ceiling fan, will make installation much easier.
  • a cet!ing fan is often times installed b a home owner and lifting a heavy fan while standing on a ladder can be dangerous.
  • a more efficient motor that weighs less wouid make installation safer.
  • Figure 34 shows th model torque of an exemplary transverse flux motor outfitted in a Hunter, Regalia 54044 ceiling fan.
  • a Regalia mode! number 54044 cet!ing fan by Hunter, Memphis, TN, was tested and then compared with the same fan configured with a transverse flux motor.
  • the commercially available Regalia fan was outfitted with an AC induction motor requiring 82 watts and producing a maximum airflow of 3112 liters/sec (6,595 CFM).
  • the residential type fan has five blades and a blade diameter of 1 ,5m (60in).
  • the motor dimensions are as provided in Table 1 ,
  • the permanent magnet wouid weigh 177g and having the following dimensions: 2.25mm radial thickness. 25mm axial, and 473mm circumference.
  • the materia! for the magnet would be an Arnold Magnetics Plastiform 2051 , MGOe.
  • the pole spacing wouid be 10mm center distance from North, to South, S.
  • the coils would weigh 470g for all three phases.
  • the coil material woufd be AWG copper magnet wire and the wire insulation wouid have UL classification of Class B (temperature 130oC) or better. There would be 335 turns.
  • the laminations would weight 164g and there would be three laminations ⁇ one per phase).
  • the lamination material would be 0.835mm thick lamination steel, similar to Tempel FPQ250 210,
  • the staior is a 3 phase design with 1 lamination per phase.
  • Laminations are formed by a combination of stamping ⁇ die cutting) and co!d-forming. To maximize performance, laminations are cut and formed in a pre-annealed state with annealing after forming. No forming is required after coif winding.
  • Prior to winding slots shall be insulated with UL recognized electrical grade Vulcanized Fiber (Fishpaper) or similar material.
  • the coils are a simple annuius shape and do not require multi-axis winding machines. Coils can be wound directly onto the stator and all three phase coils can be wound simultaneously. Alternatively, coils can be wound onto laminations prior to siator assembly.
  • Siator assembiy consists of three laminations attached to the axle shaft. There are several options for attachment including a stamped sheet metal hub with tab-in-siot, insert molding, etc. Hookup wire material and termination uses the same methods as existing ceiling fan motors. The simulations show that the thickness of the stamped end bell is sufficient to provide the magnetic back iron for the rotor.
  • Roior assembiy consists of insert molding the flexible ferrite magnetic material to the back iron (end beil). Magnetization of the poles can be performed after the magnet material is bonded to the back iron. The gap between rotor and stator was 0.635mm in the modei. This gap dimension was selected based on ease of manufacturing. Assembiy of the motor would be similar to-existing ceiling fan motors.
  • the modeled transverse flux motor would be able to match or exceed the airflow output of the Hunter's lOOoz-in (0,706 Nm), 180 RP performance requirement with 177 grams of lo cost molded ferrite magnet, three laminations totaling 164 grams and 470 grams of 26AWG magnet wire. From a manufacturing standpoint, this would be a very simple motor with only seven total electromagnetics parts and three single axis coils.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Soufflante à moteur à flux transversal à efficacité élevée utilisant un moteur à flux transversal qui peut fournir un couple pour entraîner des aubes de ventilateur à un poids réduit par rapport aux moteurs CC sans balai et à induction classiques. Un ventilateur renfermant un moteur à flux transversal peut être un ventilateur de plafond résidentiel ou un ventilateur à faible vitesse et à volume élevé. Les moteurs à flux transversal sont idéaux pour ces applications car ils sont plus efficaces à des tours faibles par minute. Un moteur à flux transversal peut posséder un stator utilisant une lame de forme annulaire qui possède des éléments transversaux qui forme un canal hélicoïdal. Une lame peut être une pièce de matériau unitaire qui est constituée à partie d'une feuille de métal, ce qui permet de créer un ensemble stator très léger. Un ventilateur illustratif peut fournir une efficacité d'écoulement d'air de plus d'environ 236 L/s*W, (SOOCFM/watt), une densité d'écoulement d'air essentielle de plus d'environ 2,36 L/s*g, (5 CFy/gramme) et une densité de puissance d'environ 150 W/kg ou plus.
PCT/US2015/013007 2013-12-10 2015-01-27 Ventilateur à moteur à flux transversal à efficacité élevée WO2015089518A1 (fr)

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US14/101,415 2013-12-10
US14/101,415 US9509181B2 (en) 2013-12-10 2013-12-10 Transverse flux stator geometry
US14/259,959 2014-04-23
US14/259,959 US9360020B2 (en) 2014-04-23 2014-04-23 Self-cooling fan assembly

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CN106855059A (zh) * 2015-12-08 2017-06-16 宁波菲仕工业设计有限公司 直驱吊扇
US9742226B2 (en) 2015-08-11 2017-08-22 Genesis Robotics Llp Electric machine
US11043885B2 (en) 2016-07-15 2021-06-22 Genesis Robotics And Motion Technologies Canada, Ulc Rotary actuator
US11139707B2 (en) 2015-08-11 2021-10-05 Genesis Robotics And Motion Technologies Canada, Ulc Axial gap electric machine with permanent magnets arranged between posts

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US6244821B1 (en) * 1999-02-19 2001-06-12 Mechanization Systems Company, Inc. Low speed cooling fan
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Publication number Priority date Publication date Assignee Title
US9742226B2 (en) 2015-08-11 2017-08-22 Genesis Robotics Llp Electric machine
US9742227B2 (en) 2015-08-11 2017-08-22 Genesis Robotics Llp Electric machine
US9742225B2 (en) 2015-08-11 2017-08-22 Genesis Robotics Llp Electric machine
US9748803B2 (en) 2015-08-11 2017-08-29 Genesis Robotics LLC Electric machine
US9748804B2 (en) 2015-08-11 2017-08-29 Genesis Robotics Llp Electric machine
US9755463B2 (en) 2015-08-11 2017-09-05 Genesis Robotics Llp Electric machine
US10075030B2 (en) 2015-08-11 2018-09-11 Genesis Robotics & Motion Technologies Canada, Ulc Electric machine
US10476323B2 (en) 2015-08-11 2019-11-12 Genesis Robotics & Motion Technologies Canada, Ulc Electric machine
US11043862B2 (en) 2015-08-11 2021-06-22 Genesis Robotics And Motion Technologies Canada, Ulc Electric machine
US11139707B2 (en) 2015-08-11 2021-10-05 Genesis Robotics And Motion Technologies Canada, Ulc Axial gap electric machine with permanent magnets arranged between posts
CN106855059A (zh) * 2015-12-08 2017-06-16 宁波菲仕工业设计有限公司 直驱吊扇
US11043885B2 (en) 2016-07-15 2021-06-22 Genesis Robotics And Motion Technologies Canada, Ulc Rotary actuator

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