WO2013150061A2 - Synchron-reluktanzmotor und unterwasserpumpe - Google Patents
Synchron-reluktanzmotor und unterwasserpumpe Download PDFInfo
- Publication number
- WO2013150061A2 WO2013150061A2 PCT/EP2013/057002 EP2013057002W WO2013150061A2 WO 2013150061 A2 WO2013150061 A2 WO 2013150061A2 EP 2013057002 W EP2013057002 W EP 2013057002W WO 2013150061 A2 WO2013150061 A2 WO 2013150061A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reluctance motor
- synchronous reluctance
- rotor
- motor according
- stator
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/132—Submersible electric motors
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/42—Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1677—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- 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
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- the invention relates to a synchronous reluctance motor for driving an underwater pump with a stator-rotor arrangement, wherein the rotor comprises a flow barrier cut for the expression of one or more magnetic pole pairs.
- the invention relates to an underwater pump with such a drive motor.
- Submersible motor pumps are used to convey liquid media in boreholes.
- the outside of the housing of the motors is completely or partially wetted by the pumped medium, usually groundwater.
- the pump drive motors used are encapsulated to prevent the penetration of the fluid into the engine compartment.
- the engine compartment is filled with a suitable liquid medium, preferably with a water-glycol mixture or oil, which wets both the unprotected rotor and in the case of an unprotected stator, the stator together with plastic-insulated winding wires or in the case of a protected stator, a can.
- a suitable liquid medium preferably with a water-glycol mixture or oil, which wets both the unprotected rotor and in the case of an unprotected stator, the stator together with plastic-insulated winding wires or in the case of a protected stator, a can.
- the injected medium ensures sufficient cooling capacity of the engine.
- the medium ensures a constant lubrication of the hydrodynamic plain bearings and may provide a desirable anti-corrosive effect of the active parts.
- Submersible motor pump units are installed in suitable boreholes in the area of the pumped medium.
- the drilling costs vary depending on the drilling depth and the required Bohrioch bemessers.
- Straight borehole depths of a few hundred meters cause enormous costs, which are halted for example by limiting the permissible Bohrioch bemessers.
- the active part length of the motor must be correspondingly increased.
- the associated very slim design of the unit can increase the ratio of rotor length to the rotor diameter.
- the active part length of the rotor is at least twice as large as the rotor diameter. For manufacturing reasons, therefore, a relatively large air gap must be realized, which is significantly larger than conventional motors fails.
- the air gap dimensions of submersible motors are more than twice the air gap dimensions of conventional motors.
- the object of the invention is therefore to modify a known synchronous refuktance motor in such a way that it can also be used in an underwater pump is, however, without having to accept appreciable losses in efficiency and power factor.
- a synchronous Reiuktanzmotor which has a stator and a stator operatively connected to the rotor.
- the rotor comprises a flux barrier cut for the expression of one or more pairs of magnetic poles.
- the rotor of the synchronous reluctance machine may preferably be provided with a cylindrical soft magnetic element coaxially arranged on the rotor axis.
- the soft magnetic element preferably comprises flux-conducting and flux-barrier sections which differ from each other in a different degree of magnetic permeability.
- the large magnetic conductivity portion is designated as the d axis of the rotor and the portion of comparatively lower conductivity as the q axis of the rotor.
- An optimal torque yield occurs when the d-axis has the largest possible magnetic conductivity and the q-axis has the lowest possible magnetic conductivity.
- This requirement can be achieved by forming a plurality of air-filled recesses in the soft magnetic element along the q-axis.
- the soft magnetic element is a laminated core, which is constructed from a plurality of stacked in the axial direction of the rotor sheets.
- This design prevents the occurrence of eddy currents in the soft magnetic element, in particular, offers a Construction of the laminated core according to the technical teaching of US 5,818,140, to which reference is expressly made in this context.
- ferrofluid According to the filling medium previously used in the engine compartment is replaced by a ferrofluid.
- a suitable choice of the ferrofluid used leads to a relative permeability of p R > 1.
- the increase in the permeability in the air gap corresponds in its effect to a geometric reduction of the magnetic air gap.
- the magnetically active air gap is correspondingly reduced.
- the greater the value of the permeability in the air gap the more advantageous is the efficiency and power factor of the synchronous reluctance motor used.
- the interaction between rotor and stator is enhanced.
- certain engine principles can also be used where, due to the technical conditions, a comparatively large air gap condition.
- ferrofluid allows the use of a synchronous reluctance motor for driving an underwater pump with a satisfactory efficiency and power factor.
- the fluid used improves the heat dissipation in the engine compartment.
- hydrodynamic sliding bearings are constantly lubricated and the ferrofluid can have a corrosion-protective effect on the active parts of the synchronous reluctance motor used.
- the ferrofluid has one or more magneto-responsive components which are magnetizable and typically superparamagnetic.
- the magnetic components can be present in different forms in a carrier liquid.
- the combination of particles and carrier liquid forms the ferrofluid.
- the components are present as particles suspended in the carrier liquid.
- the individual particles are colloidally suspended in the carrier liquid.
- the particle size is in the nano range, preferably between 1 nm and 10 nm, with particular particle sizes in the range between 5 nm and 10 nm prove to be favorable.
- One or more particles suitably consist of at least one of iron, magnetite, cobalt or a special alloy.
- the particles may be provided with a surface coating, in particular a polymeric coating. It is possible to add a surface-active substance which adheres to the surface of the particles as a monomolecular layer.
- the radicals of polar molecules of the surfactant repel each other and thus prevent clumping of the particles.
- the viscosity of the ferrofluid used is in the range of that of water, i. H. in the range of about 1 mPa-s at 20 ° C.
- the use of the ferrofluid entails a negative side effect, since the increased permeability in the engine compartment also increases scattering losses that occur. Unlike air-filled engines, the spread of the scattering field lines is no longer inhibited but encouraged, which is why the losses occur significantly.
- means may be provided in the region of at least one winding head of the stator for reducing the forehead control occurring.
- one or more elements are placed in this area to displace the ferrofluid in this area.
- Suitable elements are one or more plastic bodies, which are preferably attachable to one or more winding heads or can be attached to these.
- Alternative means for reducing the occurrence of frontal scattering arise by casting the winding heads or foaming the space around the winding heads. Basically, materials with non-magnetic properties are suitable.
- the rotor of the synchronous reluctance machine preferably consists of a laminated rotor core.
- the rotor core has individual flow barriers for the expression of one or more pairs of poles. Flush barriers are formed in a conventional manner by recesses in the rotor core, which are usually filled with air. In this case, there is a risk that the ferrofluid gets into the cavity of the river barriers.
- the rotor or at least a part of the rotor is designed encapsulated in order to seal off the rotor body from the ferrofluid.
- one or more flow barriers can be sealed separately and protected against undesired liquid entry. It is also possible to fill the flow barriers with a suitable material, such as plastic, to prevent the ingress of liquid.
- the invention further relates to an underwater pump with a synchronous reluctance motor driving the pump according to the features of the motor according to the invention or an advantageous embodiment of the synchronous reluctance motor.
- the underwater pump obviously has the same advantages and properties as the synchronous reluctance motor according to the invention or an advantageous embodiment of the motor, for which reason a renewed description is dispensed with at this point.
- FIG. 1 shows a schematic longitudinal section of the synchronous reluctance motor according to the invention
- Figure 2 is a schematic cross-sectional view of the rotor of the synchronous reluctance motor according to the invention.
- Figure 3 a detail of the stator of the synchronous reluctance motor according to the invention.
- the synchronous reluctance motor 10 shown in FIG. 1 has a conventional stator 11 and a rotor 12 which is rotatably mounted to the stator 11 and which is itself arranged coaxially on the shaft 13.
- the rotor body consists of a laminated package, for example a laminated core, wherein the individual layers or sheets are stacked in the axial direction of the shaft 13.
- a schematic representation of a single layer is shown in FIG.
- the distance between the rotor and stator walls is called the air gap.
- the motor interior is filled with a ferrofluid 20 in FIG. 1, which increases the permeability in the region between stator 11 and rotor 12 and compensates for the comparatively large geometric distance.
- the interaction between rotor 12 and stator 11, ie the reluctance force, is increased by the increased permeability.
- the ferrofluid 20 used consists of a few nanometer sized magnetic particles which are colloidally suspended in a suitable carrier liquid.
- the viscous properties of the ferrofluid 20 used are selected so that the friction between the rotor and ferrofluid 20 is as small as possible.
- the ferrofluid 20 has a viscosity in the order of the viscosity of water.
- Occurring scattering losses in the region of the winding heads 15 of the stator 1 1 should be reduced by one or more plastic body 16 as much as possible.
- the plastic body is mounted on the corresponding winding head 15 and surrounds this to complete displacement of the ferrofluid.
- FIG. 3 shows a detailed view of a cross section through the stator pack 1 with winding space 17.
- a slot wedge 30 is provided, which displaces the ferrofluid in the slot slot to form a magnetic slot
- FIG. 2 shows a cross section through the rotor core 12.
- the drawing schematically illustrates a single flow barrier of a rotor layer 41.
- the otherwise air-filled recess 40 of the rotor layer 41 is completely filled or foamed with a plastic-like material in order to prevent possible entry of the fluid.
- the complete rotor body 12, as indicated in Figure 1 be executed encapsulated.
- the rotor surface is completely coated with a suitable material 50 to protect the rotor body from liquid ingress.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Synchronous Machinery (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2014144348A RU2014144348A (ru) | 2012-04-04 | 2013-04-03 | Синхронный реактивный индукторный двигатель и погружной насос |
US14/390,487 US20150171698A1 (en) | 2012-04-04 | 2013-04-03 | Synchronous Reluctance Motor and Underwater Pump |
BR112014024013A BR112014024013A8 (pt) | 2012-04-04 | 2013-04-03 | Motor síndrico de relutância e bomba subaquática |
JP2015503868A JP2015514387A (ja) | 2012-04-04 | 2013-04-03 | 同期リラクタンスモータおよび水中ポンプ |
EP13715657.6A EP2834905A2 (de) | 2012-04-04 | 2013-04-03 | Synchron-reluktanzmotor und unterwasserpumpe |
CN201380015920.4A CN104285360A (zh) | 2012-04-04 | 2013-04-03 | 同步磁阻马达和水下泵 |
KR1020147027821A KR20140141632A (ko) | 2012-04-04 | 2013-04-03 | 동기식 릴럭턴스 모터 및 수중 펌프 |
ZA2014/06729A ZA201406729B (en) | 2012-04-04 | 2014-09-12 | Snychronous reluctance motor and underwater pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012205567A DE102012205567A1 (de) | 2012-04-04 | 2012-04-04 | Synchron-Reluktanzmotor und Unterwasserpumpe |
DE102012205567.3 | 2012-04-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2013150061A2 true WO2013150061A2 (de) | 2013-10-10 |
WO2013150061A3 WO2013150061A3 (de) | 2014-07-24 |
Family
ID=48087558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2013/057002 WO2013150061A2 (de) | 2012-04-04 | 2013-04-03 | Synchron-reluktanzmotor und unterwasserpumpe |
Country Status (11)
Country | Link |
---|---|
US (1) | US20150171698A1 (de) |
EP (1) | EP2834905A2 (de) |
JP (1) | JP2015514387A (de) |
KR (1) | KR20140141632A (de) |
CN (1) | CN104285360A (de) |
BR (1) | BR112014024013A8 (de) |
CA (1) | CA2869344A1 (de) |
DE (1) | DE102012205567A1 (de) |
RU (1) | RU2014144348A (de) |
WO (1) | WO2013150061A2 (de) |
ZA (1) | ZA201406729B (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015016685A1 (de) * | 2015-12-22 | 2017-06-22 | Ksb Aktiengesellschaft | Kreiselpumpe , insbesondere Umwälzpumpe |
CN106849390A (zh) * | 2017-04-13 | 2017-06-13 | 浙江贝德泵业有限公司 | 一种带有永磁同步电机的空调泵 |
ES2928872T3 (es) | 2017-04-14 | 2022-11-23 | Carrier Corp | Mejora de inductancia de devanado de una máquina eléctrica |
CN111509914A (zh) * | 2019-01-31 | 2020-08-07 | 马斌严 | 外转式马达结构 |
GB2605433A (en) * | 2021-03-31 | 2022-10-05 | Epropelled Ltd | Fluid core electromagnetic machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5818140A (en) | 1995-07-11 | 1998-10-06 | Vagati; Alfredo | Synchronous reluctance electrical motor having a low torque-ripple design |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB421857A (en) * | 1932-11-28 | 1935-01-01 | Franz Sigmund | Improvements in or relating to submersible electric motors |
GB803395A (en) * | 1955-12-02 | 1958-10-22 | Harland Engineering Co Ltd | Improvements in or relating to electric motors |
DE1105976B (de) * | 1959-07-04 | 1961-05-04 | Pleuger & Co | Elektrischer Kurzschlusslaeufermotor grosser axialer Laenge der nassen Bauart mit kegelfoermigem Laeufer |
DE2101672A1 (de) * | 1971-01-15 | 1972-07-20 | Licentia Gmbh | Heizungswasser-Umwälzpumpe |
SU1130958A1 (ru) * | 1981-03-05 | 1984-12-23 | Среднеазиатский Филиал Всесоюзного Научно-Исследовательского Института Гидромашиностроения | Погружной электродвигатель |
JPS5854846A (ja) * | 1981-09-25 | 1983-03-31 | Toshiba Corp | 回転子巻線 |
JPS5935546A (ja) * | 1982-08-20 | 1984-02-27 | Hitachi Ltd | 水中モ−タの固定子の製造方法 |
US5053666A (en) * | 1988-06-06 | 1991-10-01 | General Electric Company | Construction of reluctance motors |
JPH0417537A (ja) * | 1990-05-11 | 1992-01-22 | Daikin Ind Ltd | 電動機の回転子 |
WO1998011650A1 (de) * | 1996-09-10 | 1998-03-19 | Sulzer Electronics Ag | Rotationspumpe und verfahren zum betrieb derselben |
JP3957807B2 (ja) * | 1997-03-13 | 2007-08-15 | 松下電器産業株式会社 | ロータコア |
JP2000134849A (ja) * | 1998-10-28 | 2000-05-12 | Brother Ind Ltd | リラクタンスモータ |
JP2001349294A (ja) * | 2000-06-07 | 2001-12-21 | Nidec Shibaura Corp | ポンプモータ |
DE10152497A1 (de) * | 2001-10-24 | 2003-05-15 | Pierburg Gmbh | Nassläuferpumpe |
JP3775348B2 (ja) * | 2002-05-31 | 2006-05-17 | 株式会社日立製作所 | 回転電機 |
CA2630120C (en) * | 2002-09-18 | 2011-04-19 | Artificial Lift Company Limited | Electric motors for powering downhole tools |
US6879076B2 (en) * | 2002-12-09 | 2005-04-12 | Johnny D. Long | Ellipsoid generator |
KR100690682B1 (ko) * | 2005-06-15 | 2007-03-09 | 엘지전자 주식회사 | 플럭스배리어 타입 동기 릴럭턴스 모터의 로터 |
US20100164303A1 (en) * | 2008-12-31 | 2010-07-01 | Schlumberger Technology Corporation | Submersible motor with ferrofluid gap |
CN102386691A (zh) * | 2010-09-06 | 2012-03-21 | 郑州市鑫科节能技术有限公司 | 一种节能型电动机 |
-
2012
- 2012-04-04 DE DE102012205567A patent/DE102012205567A1/de not_active Withdrawn
-
2013
- 2013-02-14 CA CA2869344A patent/CA2869344A1/en not_active Abandoned
- 2013-04-03 WO PCT/EP2013/057002 patent/WO2013150061A2/de active Application Filing
- 2013-04-03 RU RU2014144348A patent/RU2014144348A/ru unknown
- 2013-04-03 EP EP13715657.6A patent/EP2834905A2/de not_active Withdrawn
- 2013-04-03 JP JP2015503868A patent/JP2015514387A/ja active Pending
- 2013-04-03 BR BR112014024013A patent/BR112014024013A8/pt not_active Application Discontinuation
- 2013-04-03 US US14/390,487 patent/US20150171698A1/en not_active Abandoned
- 2013-04-03 CN CN201380015920.4A patent/CN104285360A/zh active Pending
- 2013-04-03 KR KR1020147027821A patent/KR20140141632A/ko not_active Application Discontinuation
-
2014
- 2014-09-12 ZA ZA2014/06729A patent/ZA201406729B/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5818140A (en) | 1995-07-11 | 1998-10-06 | Vagati; Alfredo | Synchronous reluctance electrical motor having a low torque-ripple design |
Also Published As
Publication number | Publication date |
---|---|
WO2013150061A3 (de) | 2014-07-24 |
BR112014024013A2 (de) | 2017-06-20 |
EP2834905A2 (de) | 2015-02-11 |
DE102012205567A1 (de) | 2013-10-10 |
ZA201406729B (en) | 2015-11-25 |
KR20140141632A (ko) | 2014-12-10 |
BR112014024013A8 (pt) | 2018-07-31 |
CA2869344A1 (en) | 2013-10-10 |
US20150171698A1 (en) | 2015-06-18 |
CN104285360A (zh) | 2015-01-14 |
JP2015514387A (ja) | 2015-05-18 |
RU2014144348A (ru) | 2016-05-27 |
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