WO2007107132A1 - Rotor d'un moteur, notamment d'un moteur électrique - Google Patents

Rotor d'un moteur, notamment d'un moteur électrique Download PDF

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Publication number
WO2007107132A1
WO2007107132A1 PCT/DE2007/000048 DE2007000048W WO2007107132A1 WO 2007107132 A1 WO2007107132 A1 WO 2007107132A1 DE 2007000048 W DE2007000048 W DE 2007000048W WO 2007107132 A1 WO2007107132 A1 WO 2007107132A1
Authority
WO
WIPO (PCT)
Prior art keywords
segments
rotor
individual
another
rotor according
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.)
Ceased
Application number
PCT/DE2007/000048
Other languages
German (de)
English (en)
Inventor
Thomas Schencke
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.)
Temic Automotive Electric Motors GmbH
Original Assignee
Temic Automotive Electric Motors GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Temic Automotive Electric Motors GmbH filed Critical Temic Automotive Electric Motors GmbH
Priority to DE112007000076T priority Critical patent/DE112007000076A5/de
Publication of WO2007107132A1 publication Critical patent/WO2007107132A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew

Definitions

  • Rotor for a motor in particular an electric motor
  • the invention relates to a rotor for an electric motor, in particular a permanent-magnet.
  • the invention relates to a method for producing a lamella packet for a rotor.
  • Such electric motors are particularly suitable for use in motor vehicles.
  • electric motors which are designed as small engines, play an important role due to the limited space.
  • Small motors are electric motors of small dimensions and usually have a power of up to 1 kW.
  • the electric motor may preferably be a permanent-magnet commutator motor or a brushless, permanent-magnet DC or synchronous motor or another electric motor.
  • the designation "AC servo motor ⁇ , which is also used for this motor type, can lead to confusion since it is also used for highly dynamically controlled asynchronous motors. To exclude this, the electronically commutated motor is referred to below as the EC motor.
  • Electric motors can be designed as internal rotor or external rotor motors.
  • Internal rotor motors have an outer stator and an inner rotor. The rotor is inserted coaxially in the stator. In an external rotor motor, the outer rotor coaxially surrounds the inner stator.
  • the rotor or the rotor shaft is rotatably mounted in all variants.
  • the invention relates primarily to internal rotor motors, on the basis of which the invention is explained in more detail below.
  • Electric motors which are formed from packages of individual sheets or single lamellae and manufactured by so-called stamping-packaging or punching L'sier packaging. in the Detail are punched by means of a complex and expensive punching laser system, the individual sheets or fins within the stamping sequence and simultaneously welded into packages. In this case, the individual sheets or fins are connected to each other in a very rapid succession by pressed-out knobs of various designs (also called "bundling naps"). The onneiernoppen hold the individual slats together in the package.
  • the disk pack can be encapsulated with plastic ' .
  • the individual slats can be glued together.
  • the area between groove base and shaft is not completely required for commutator armatures or between magnet inner side and shaft in permanent magnet rotors for magnetic flux guidance and can be reduced to a defined yoke width.
  • the area between the yoke and a remaining inner ring for attaching the package to the rotor shaft is usually punched free except for a few remaining webs.
  • the recovered surface serves as an additional air passage surface for cooling the engine components.
  • Heat loss is better transported from heat sources to heat sinks. This can be caused by additional fan wheels, which are mounted on the motor shaft or limited
  • Air turbulence is usually not and the permissible
  • the invention is therefore an object of the invention to provide a rotor for an electric motor, which is also 'at less Size is sufficiently well cooled.
  • a particularly suitable method for producing a disk set for a rotor is to be specified.
  • the object is achieved by the features of claim 1.
  • the object is achieved by the features of claim 15th
  • a disc pack which comprises a plurality of stacked identical individual slats, each having distributed over the circumference outer segments, the are connected to each other via an annular, radially inwardly facing outer yoke, in whose inner circle a predetermined number of inner segments is provided, which are interconnected via an annular inner yoke, wherein inside the inner circle of the outer yoke wing elements are integrated so that upon rotation of Rotor axial flow is generated.
  • the wing elements thereby cause the inner free part of the rotor core in nature 'of blades of an axial fan, an axial air flow which is used to cool the motor components.
  • At least two of the individual lamellae are rotatable relative to one another in the circumferential direction such that their outer segments are arranged identically one above the other and their inner segments are offset relative to one another at a predetermined angle ⁇ , wherein the inner segments offset from one another form the wing elements.
  • Due to the angularly offset inner segments of axially one behind the other arranged individual lamellae is an integrated slightly curved ' Wing element formed, which is surrounded by the surrounding medium, in this case air, obliquely on rotation of the shaft and deflected.
  • the offset inner segments act like blades of an axial fan. Upon rotation of the shaft creates an axial pressure difference and a suction is generated, which flows through the inner region of the rotor as an axial flow.
  • the inner segments in the simplest form when punching packages from the individual slats, z. B.
  • Sheet metal lamellas to be punched out.
  • wings molded onto the inner segments or additionally introduced may form wings, which however require additional parts or an additional tool for overmolding.
  • At least one of the suction-side individual louvers and one of the pressure-side individual louvers are arranged offset to one another.
  • the number of predetermined inner segments equal to the number of the outer segments.
  • the number of outer segments is not equal to a whole multiple of the number of predetermined inner segments, which form the integrated wing elements. That is, the predetermined number of inner segments that make up the fan is. no divisor of the number of outer segments, ie no divisor of the number of slots or poles. In this case, any number of inner and outer segments can be specified.
  • the number of inner and outer segments depends on the type and structure of the engine.
  • a plurality of individual laminations stacked identically one above the other can each form one, group.
  • a plurality of groups are rotatable relative to each other in the circumferential direction, wherein the inner segments of a single group are arranged identically one above the other and the inner segments of adjacent groups are arranged offset ⁇ to one another at a predetermined angle and form the wing elements.
  • the least common multiple of the number results in the outer segments and the number of inner segments, the number of circumferential / division, by which the single lamella and / or groups of individual slats can be rotated or is.
  • the predetermined angle ⁇ by which the inner segments are arranged offset from each other during rotation of adjacent individual slats and / or adjacent groups of individual slats, can be determined according to:
  • At least one of the wing elements can additionally be arranged on the pressure side by a larger radial inner diameter of the inner circle of at least one pressure side
  • Stirnisolation be arranged suction and / or pressure side.
  • the reduction of the suction or pressure side openings causes a corresponding deflection of the flow.
  • the radially outwardly facing outer segments in one possible embodiment form poles of a permanent magnet rotor. These are provided in the outer segments, for example, recesses for receiving magnets. Each outer segment is provided with a recess in which at least one magnet is arranged. The magnets act as magnetic poles of the rotor. The number of poles corresponds to the number of distributed over the circumference of the disk pack arranged magnets and outer segments.
  • the outer segments can form grooves separated by grooves, in particular mushroom-shaped webs of a commutator armature. The grooves between the mushroom-shaped webs serve to accommodate windings.
  • the inner segments are designed as inner webs, the resulting freely stamped rotor inner region serves as an air passage surface for engine cooling.
  • the motor is an internal rotor motor in which the surface of the disk set of the rotor facing the stator is the outer surface of the essentially cylindrical rotor.
  • a plurality of individual lamellae are centered and stacked on one another in an identical position and punched out outer segments and inner segments, wherein individual or several identically punched individual lamellae are rotated in the circumferential direction to each other that their outer segments identical and their inner segments are offset from each other with a predetermined angle ⁇ and the mutually offset inner segments form integrated wing elements in the inner circle, which generate an axial air flow in the inner region of the rotor upon rotation of the rotor.
  • the individual lamellae by form,. Cloth and / or friction fit together. For example, these are mechanically connected to each other by knobs.
  • the individual slats can be mechanically clamped together.
  • these can be encapsulated with plastic or bonded together with adhesive.
  • the advantages achieved with the • invention are in particular that for the smallest possible Construction of the rotor and a sufficient engine cooling in the rotor inner region wing elements are integrated, which cause an axial flow of air during rotation of the rotor. Furthermore, the invention makes it possible to produce groups of individual lamellae for the rotor lamination stack. The engine is cheaper to produce overall.
  • FIG. 1 is a schematic perspective view of a rotor according to the invention with a freely punched rotor inner region (prior art),
  • FIG. 2 schematically shows a diagram for the offset of inner segments of the rotor blade package to form integrated wing elements
  • FIG. 3 shows schematically in perspective an alternative embodiment of a rotor according to the invention with free punched
  • FIG. 4 shows schematically a diagram for the offset of inner segments of the rotor blade package to form the integrated wing elements
  • Fig. 5 shows schematically in longitudinal section a further alternative embodiment of a rotor according to the invention with additionally changed end plates on the suction and pressure side.
  • FIG. 1 shows schematically in perspective the
  • the rotor 1 is formed of a plate pack 2, that a plurality of identical trained single laminations 2.1 to 2.n, which are centered stacked.
  • the plate or plate package 2 of the rotor 1 for an electric machine is usually produced by stamped packetizing. In this case, individual sheets 2.1 to 2.n outer segments 4 and inner segments 6 are punched out of individual sheets.
  • the outer segments 4 are formed as distributed over the circumference and radially outwardly facing webs, which are separated by grooves N from each other.
  • the outer segments 4 are formed depending on the design of the engine, for example, as a mushroom-shaped webs for receiving windings of a commutator or as webs with recesses for receiving magnets of a permanent magnet rotor.
  • the outer segments 4 are connected to each other radially inwardly via an annular outer yoke 8.
  • the inner segments 6 are punched out.
  • the inner segments 6 are connected to each other via an annular inner yoke 10, in whose inner circle K2 a shaft 12 of the rotor 1 centered can be arranged.
  • turning stations are provided in stamping package tools, which ensure a rotation of the individual laminations 2.1 to 2.n or sheets during packaging.
  • the symmetries in the structure of the sheet or the individual lamellae 2.1 to 2.n must be taken into account so that the smallest possible turning step corresponds to a slot pitch in the case of commutator armatures or a pole pitch in the case of permanent magnet rotors.
  • the individual blades 2.1 to 2.n are rotated by a multiple of a slot pitch, e.g. 90 °, because the interior has a different pitch.
  • the number of outer segments 4 is unequal, in particular greater than the number of inner segments 6.
  • Inner segments 6 freely stamped rotor inner region the known rotational function of Stanzunierwerkmaschine is used. As shown in detail in FIG. 2, the first individual lamella 2.1 and the last individual lamella 2.n are rotated forwards or backwards by a slot pitch in accordance with the desired flow direction.
  • a slot pitch in accordance with the desired flow direction.
  • at least one wing element is formed in the free-punched rotor inner region by a resulting offset arrangement of the inner segments 6 by an angle ⁇ of about 18 °, the upon rotation of the rotor 1 a axial air flow generated by the inner circle K2.
  • the number of the wing elements forming circumferentially uniformly distributed inner segments 6 is selected such that they are not a divisor of Nutg. Pole number and thus the number of outer segments 4.
  • the smallest common multiple KgV from the number of outer segments 4, ie groove or pole number, and the number of inner segments 6 then gives the number of divisions on the circumference by which the inner segments 6 adjacent and rotated individual lamellae 2.1 to 2.n offset can be.
  • the angle ⁇ by which the inner segments 6 in rotation of adjacent individual laminations 2.1 to 2.n is arranged offset from one another, can therefore be determined according to:
  • the disk set 2 is formed from 17 Einzelellairtellen 2.1 to 2.17, each having a sheet thickness of 0.65 mm. Through a twist of the individual slats 2.1 to 2.17 for each seven slot pitches up • results. a 6 ° gradation of the inner segments 6 in the rotor inner region, ie in the inner circle Kl of the outer yoke 8. In nine stages or groups G1 to G9 with different numbers of identical stacked individual lamellae 2.1 to 2.17, the fan profile shown in Figures 3 and 4 results from the mutually offset inner segments 6, which form the integrated wing elements.
  • a multiplicity of profiles can be represented so that the blade profile can be adjusted to the respective pressure or flow conditions in the rotor 1 and thus in the engine can be adjusted.
  • Table 2 shows the rotation of the axially successively arranged individual lamellae 2.1 to 2.17 in number of slot pitches and the grouping of the individual lamellae 2.1 to 2.17 into the groups G1 to G9 and the respective number of individual lamellae 2.1 to 2.17 in the respective group G1 to G9.
  • Table 2 Twist and number of plates for a sash profile
  • the inner segments 6 are designed in the inner region of the rotor assembly like the blades of a radial fan. During rotation, the molecules of the flowing medium are accelerated and pushed outward. This creates a radial pressure difference. If now the radially outer area and on the pressure side of the radial inner area at least partially covered by an end plate or alternatively by a Stirnisolation on the Sauseite, creates a corresponding flow, which can be used to cool the engine components. An example of this is shown in FIG.
  • the first individual lamella 2.1 has a smaller radial outer diameter Da of the inner ring circle K1 than the other individual lamellae 2.2 to 2.16.
  • the last individual lamella 2.17 has a larger radial inner diameter Di of the inner ring circle K1 than the other individual lamellae 2.1 to 2.16.
  • the individual laminations 2.1 to 2.n for example, thin metal sheets centered stacked.
  • the individual lamellae are 2.1 to 2.n in an identical position centered on each other.
  • a centered recess 14 for receiving the shaft 12 of the rotor 1 is punched in the individual blades 2.1 to 2.n.
  • the outer segments 4 and the inner segments 6 are punched out.
  • single lamellae 2.1 to 2.n can be stacked on top of each other.
  • a plurality of identically stacked individual lamellae 2.1 to 2.n form a group G1 to G9.
  • the groups G1 to G9 of individual lamellae 2.1 to 2.n are arranged rotated in the circumferential direction with respect to one another.
  • stator facing surface of the disk set 2 is the outer surface of the substantially cylindrical rotor first

Landscapes

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

Abstract

L'invention concerne un rotor d'un moteur à excitation permamente comprenant un paquet de lamelles (2) comportant une pluralité de lamelles individuelles (2.1 à 2.n) identiques superposées qui présentent respectivement des segments externes (4) répartis sur la circonférence et assemblés par une culasse externe (8) annulaire qui pointe radialement vers l'intérieur et dont le cercle interne (Kl) présente un nombre prédéterminé de segments internes (6) assemblés par une culasse interne (10). Des éléments ailettes sont intégrés à l'intérieur du cercle interne (Kl) de la culasse externe (8) de telle façon qu'un écoulement d'air axial se produise lors de la rotation du rotor (1).
PCT/DE2007/000048 2006-03-20 2007-01-16 Rotor d'un moteur, notamment d'un moteur électrique Ceased WO2007107132A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112007000076T DE112007000076A5 (de) 2006-03-20 2007-01-16 Rotor für einen Motor, insbesondere für einen Elektromotor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102006013128 2006-03-20
DE102006013128.2 2006-03-20
DE102006058711.1 2006-12-13
DE102006058711A DE102006058711A1 (de) 2006-03-20 2006-12-13 Rotor für einen Motor, insbesondere für einen Elektromotor

Publications (1)

Publication Number Publication Date
WO2007107132A1 true WO2007107132A1 (fr) 2007-09-27

Family

ID=37986862

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/000048 Ceased WO2007107132A1 (fr) 2006-03-20 2007-01-16 Rotor d'un moteur, notamment d'un moteur électrique

Country Status (2)

Country Link
DE (2) DE102006058711A1 (fr)
WO (1) WO2007107132A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017121526A1 (fr) * 2016-01-15 2017-07-20 Continental Automotive Gmbh Machine électrique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012219003A1 (de) * 2012-10-18 2014-04-24 Robert Bosch Gmbh Läuferanordnung für eine rotatorische elektrische Maschine
DE102016222260A1 (de) 2016-11-14 2018-03-08 Continental Automotive Gmbh Elektrische Maschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1043887A (en) * 1905-12-06 1912-11-12 Gen Electric Dynamo-electric machine.
JPH0360855U (fr) * 1989-10-13 1991-06-14
US5986366A (en) * 1998-09-23 1999-11-16 Sundstrand Corporation Rotor for a dynamoelectric machine
EP1220418A2 (fr) * 2000-12-27 2002-07-03 Asmo Co., Ltd. Noyau de moteur avec tôles de noyau empilés et son procédé d'empilage
US20040189140A1 (en) * 2003-01-15 2004-09-30 Takeo Fukuda Electric motor for hybrid vehicles
US20040222714A1 (en) * 2003-05-07 2004-11-11 Denso Corporation Rotary electric machine having laminated armature core

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1043887A (en) * 1905-12-06 1912-11-12 Gen Electric Dynamo-electric machine.
JPH0360855U (fr) * 1989-10-13 1991-06-14
US5986366A (en) * 1998-09-23 1999-11-16 Sundstrand Corporation Rotor for a dynamoelectric machine
EP1220418A2 (fr) * 2000-12-27 2002-07-03 Asmo Co., Ltd. Noyau de moteur avec tôles de noyau empilés et son procédé d'empilage
US20040189140A1 (en) * 2003-01-15 2004-09-30 Takeo Fukuda Electric motor for hybrid vehicles
US20040222714A1 (en) * 2003-05-07 2004-11-11 Denso Corporation Rotary electric machine having laminated armature core

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017121526A1 (fr) * 2016-01-15 2017-07-20 Continental Automotive Gmbh Machine électrique
CN108432093A (zh) * 2016-01-15 2018-08-21 大陆汽车有限公司 电动机器
CN108432093B (zh) * 2016-01-15 2020-01-31 大陆汽车有限公司 电动机器
US11018539B2 (en) 2016-01-15 2021-05-25 Vitesco Technologies GmbH Electric machine with helical cooling channels

Also Published As

Publication number Publication date
DE112007000076A5 (de) 2008-09-18
DE102006058711A1 (de) 2007-10-11

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