WO2018099507A1 - Rotor of an electric motor - Google Patents
Rotor of an electric motor Download PDFInfo
- Publication number
- WO2018099507A1 WO2018099507A1 PCT/DE2017/100898 DE2017100898W WO2018099507A1 WO 2018099507 A1 WO2018099507 A1 WO 2018099507A1 DE 2017100898 W DE2017100898 W DE 2017100898W WO 2018099507 A1 WO2018099507 A1 WO 2018099507A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- receiving pocket
- receiving
- rotor according
- recess
- Prior art date
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Classifications
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- 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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
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- 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 rotor equipped with permanent magnets of an electric motor according to the preamble of claim 1.
- Such a permanent magnet rotor for an electric machine is disclosed for example in DE 10 2006 056 873 A1.
- This known rotor has a rotor shaft and a rotor packet attached thereto.
- receiving pockets and recesses are provided, wherein permanent magnets are arranged in the receiving pockets.
- the permanent magnets are fixed in the respective associated receiving pocket by a bending of the lying between the respective recess and the respective receiving pocket portion of the inner region. The fixation of the permanent magnets in the receiving pockets is thus carried out by a subsequently introduced deformation of the receiving pockets.
- Another permanent magnet rotor is known from EP 1 009 085 B1.
- This permanent magnet rotor suitable for a brushless electric motor has a yoke formed by laminating many steel sheets and having an even number of outwardly projecting magnetic poles. To influence the magnetic flux, a cut-out shape of the magnetic poles is provided.
- the brushless electric motor should be executable as a three-phase four-pole motor or as a three-phase six-pole motor.
- WO 2016/037983 A1 discloses a method for producing a rotor unit of a permanently excited synchronous motor. As part of this manufacturing process, permanent magnets are first used in recesses of a sheet metal element package. Subsequently, the arrangement of the sheet metal element package and the permanent magnet is encapsulated in plastic.
- the invention is based on the object, a developed over the prior art permanent magnet rotor for an electric machine, that is an NEN electric motor and / or generator to specify which is characterized by a high mechanical precision at the same time both manufacturing technology and electrical engineering properties.
- the rotor is constructed from a laminated rotor core in which permanent magnets are each held in a receiving pocket with an oblong cross-section, in particular pressed in. At each end of both longitudinal sides of each receiving e- pocket an empty recess is arranged in each case. Overall, each receiving pocket so four recesses are assigned. Each of these recesses is smaller than the associated receiving pocket.
- the individual recesses each have, for example, a rectangular shape.
- the advantage of the empty recesses, which are arranged in pairs at both ends of each receiving pocket, is in particular that they absorb deformations, which are caused by the press-fitting of the permanent magnet in the receiving pocket.
- the geometry on the circumference of the rotor laminated core is virtually unaffected by the pressing in of the permanent magnets.
- the diameter of the rotor lamination stack is a variable which can not be changed. This also applies in cases in which the empty recesses, which are arranged next to the individual receiving pockets, have no rectangular but, for example, a rounded shape.
- each receiving pocket has at its four peripheral portions each adjacent to an empty recess in each case an inwardly directed projection which is provided for contacting the permanent magnet. Clamping forces between the permanent magnet and the rotor lamination stack are thus transferred mainly in those areas of the rotor lamination stack, which are designed to be significantly yielding by means of the empty recesses.
- the length of an empty recess measured in the longitudinal direction of a receiving pocket is shorter than the half length of the receiving pocket measured in the same direction.
- the sum of the lengths measured in the longitudinal direction of the receiving pocket of the arranged on a longitudinal side of the receiving pockets empty recesses is at least 15% and at most 35% of the measured in the same direction length of the receiving pocket.
- the elongated cross sections of the receiving pockets extend in the radial direction of the rotor lamination stack. Overall, this gives a star-shaped arrangement of the receiving pockets.
- each an elongated, also aligned in the radial direction additional recess is arranged according to an advantageous embodiment.
- the empty, elongated additional recesses act as flux-conducting clearances within the rotor laminated core. To a lesser extent, they also serve to absorb deformations which are caused by the pressing in of the permanent magnets, for example rare earth magnets, into the receiving pockets.
- each additional recess is preferably at least 65% and at most 95% of the length measured in the same direction of each receiving pocket equipped with a permanent magnet.
- each empty additional recess measured in the tangential direction of the rotor laminated core is preferably at least 20% and at most 40% of the width measured in the same direction of each receiving pocket.
- each receiving pocket and eight additional recesses are distributed uniformly.
- the angular distance between two adjacent receiving pockets is accordingly 45 °, wherein the additional recesses are each arranged centrally between two receiving pockets.
- the rotor is suitable for use in a brushless electric motor.
- this is an electric motor of an electric camshaft adjuster or a device for varying the compression ratio of a reciprocating piston engine.
- FIG. 1 shows a first embodiment of a permanent magnet rotor
- FIG. 2 shows a detail of the rotor according to FIG. 1, FIG.
- Fig. 3 shows a detail of a second embodiment of a permanent magnet rotor.
- a designated generally by the reference numeral 1 rotor is designed as a permanent magnet rotor and for use in a brushless DC motor (BDLC motor) provided.
- the electric motor is coupled on the output side with an actuating drive, not shown, which serves to adjust a camshaft of an internal combustion engine or an eccentric shaft.
- a secondary connecting rod is articulated to it, which cooperates with other components of a crank mechanism of a reciprocating piston engine in such a way that its compression ratio is adjustable.
- the rotor 1 comprises a plurality of rotor laminations 3, which together form a rotor laminations.
- In the rotor laminations 3 are in cross section elongated receiving pockets 2, in which magnets 4, namely permanent magnets, are pressed. All receiving pockets 2 are aligned in the radial direction of the rotor 1.
- the individual permanent magnets 4 each have a cuboid shape.
- each case between two circumferentially adjacent receiving pockets 2 is also a longitudinal, aligned in the radial direction additional recess 5.
- the measured in the radial direction of the rotor length of the additional recess 5 is denoted by Lzus, measured in the tangential direction width of the additional recess 5 with Bz.
- Lges is the length of the receiving pocket 2 measured in the radial direction
- BA denotes their width measured in the tangential direction.
- At the two ends of each longitudinal side of the substantially rectangular receiving pocket 2 is a comparatively small empty recess 6.
- the receiving pocket 2 is thus surrounded by four empty recesses 6, which are each rectangular in shape.
- the longitudinal sides of the empty recesses 6 are in this case arranged parallel to the longitudinal sides of the receiving pocket 2.
- the length, measured in the radial direction of the rotor 1, of the two recesses 6 arranged next to a longitudinal side of the receiving pocket 2 is denoted by Li, L2.
- the lengths Li, L2 of all recesses 6 are identical.
- the sum of the length Li of a first recess 6 at a certain longitudinal side of the receiving pocket 2 and the length L2 of the second arranged on this longitudinal side recess 6 is more than 15% and less than 35% of the length L tot of the receiving pocket. 2
- each receiving pocket 2 has a rectangular cross-section.
- Each magnet 4 pressed into a receiving pocket 2 rests against the entire longitudinal sides of the receiving pocket 2, apart from possible rounding off at the edges of the magnet 4 and / or at the corners of the receiving pocket 2.
- each receiving pocket 2 has a total of four projections 7, which are each directed into the interior of the receiving pocket 2 and are located in those sections of the longitudinal sides of the recess 2, which are each adjoined by an empty recess 6.
- acting on the radially inner and at the radially outer end of the receiving pocket 2 clamping forces between the magnet 4 and the rotor plate 3. In these areas by the given clamping association resulting deformations are absorbed by the empty recesses 6, without the outer contours of the rotor blade 3 change.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a rotor of an electric motor, in particular in an electric camshaft adjuster, comprising a rotor core stack formed from individual rotor metal sheets (3), in which magnets (4) are maintained in receiving pockets (2) having a longitudinal cross-section, each receiving pocket (2) being adjacent to at least one empty recess (6). One empty recess (6) is respectively arranged on each end of both longitudinal sides of each receiving pocket (2).
Description
Rotor eines Elektromotors Rotor of an electric motor
Die Erfindung betrifft einen mit Permanentmagneten bestückten Rotor eines Elektro- motors nach dem Oberbegriff des Anspruchs 1 . The invention relates to a rotor equipped with permanent magnets of an electric motor according to the preamble of claim 1.
Ein derartiger Permanentmagnetrotor für eine elektrische Maschine ist beispielsweise in der DE 10 2006 056 873 A1 offenbart. Dieser bekannte Rotor weist eine Rotorwelle und ein daran befestigtes Rotorpaket auf. In dem Rotorpaket sind Aufnahmetaschen sowie Aussparungen vorgesehen, wobei in den Aufnahmetaschen Permanentmagnete angeordnet sind. Die Permanentmagnete sind in der jeweils zugehörigen Aufnahmetasche durch eine Aufbiegung des zwischen der jeweiligen Aussparung und der jeweiligen Aufnahmetasche liegenden Teilbereichs des inneren Bereichs fixiert. Die Fixierung der Permanentmagnete in den Aufnahmetaschen erfolgt somit durch eine nachträglich eingebrachte Verformung der Aufnahmetaschen. Such a permanent magnet rotor for an electric machine is disclosed for example in DE 10 2006 056 873 A1. This known rotor has a rotor shaft and a rotor packet attached thereto. In the rotor package receiving pockets and recesses are provided, wherein permanent magnets are arranged in the receiving pockets. The permanent magnets are fixed in the respective associated receiving pocket by a bending of the lying between the respective recess and the respective receiving pocket portion of the inner region. The fixation of the permanent magnets in the receiving pockets is thus carried out by a subsequently introduced deformation of the receiving pockets.
Ein weiterer Dauermagnetrotor ist aus der EP 1 009 085 B1 bekannt. Dieser für einen bürstenlosen Elektromotor geeignete Permanentmagnetrotor weist ein Joch auf, das durch Laminieren vieler Stahlbögen gebildet ist und eine gerade Anzahl nach außen vorstehender Magnetpole aufweist. Zur Beeinflussung des Magnetflusses ist eine ausgeschnittene Form der Magnetpole vorgesehen. Der bürstenlose Elektromotor soll als Dreiphasen-Vierpolmotor oder als Dreiphasen-Sechspolmotor ausführbar sein. Another permanent magnet rotor is known from EP 1 009 085 B1. This permanent magnet rotor suitable for a brushless electric motor has a yoke formed by laminating many steel sheets and having an even number of outwardly projecting magnetic poles. To influence the magnetic flux, a cut-out shape of the magnetic poles is provided. The brushless electric motor should be executable as a three-phase four-pole motor or as a three-phase six-pole motor.
Die WO 2016/037983 A1 offenbart ein Verfahren zum Herstellen einer Rotoreinheit eines permanent erregten Synchronmotors. Im Rahmen dieses Herstellungsverfahrens werden zunächst Permanentmagnete in Aussparungen eines Blechelementpaketes eingesetzt. Anschließend wird die Anordnung aus dem Blechelementpaket und den Permanentmagneten mit Kunststoff umspritzt. WO 2016/037983 A1 discloses a method for producing a rotor unit of a permanently excited synchronous motor. As part of this manufacturing process, permanent magnets are first used in recesses of a sheet metal element package. Subsequently, the arrangement of the sheet metal element package and the permanent magnet is encapsulated in plastic.
Der Erfindung liegt die Aufgabe zugrunde, einen gegenüber dem Stand der Technik weiterentwickelten Permanentmagnetrotor für eine elektrische Maschine, das heißt ei-
nen Elektromotor und/oder Generator, anzugeben, welcher sich durch eine hohe mechanische Präzision bei zugleich sowohl fertigungstechnisch als auch elektrotechnisch günstigen Eigenschaften auszeichnet. The invention is based on the object, a developed over the prior art permanent magnet rotor for an electric machine, that is an NEN electric motor and / or generator to specify which is characterized by a high mechanical precision at the same time both manufacturing technology and electrical engineering properties.
Diese Aufgabe wird erfindungsgemäß gelöst durch einen für eine elektrische Maschine, insbesondere einen Elektromotor, vorgesehenen Rotor mit den Merkmalen des Anspruchs 1 . Der Rotor ist aus einem Rotorblechpaket aufgebaut, in welchem Permanentmagnete jeweils in einer Aufnahmetasche mit länglichem Querschnitt gehalten, insbesondere eingepresst, sind. An jedem Ende beider Längsseiten jeder Aufnahm e- tasche ist jeweils eine leere Aussparung angeordnet. Insgesamt sind jeder Aufnahmetasche damit vier Aussparungen zugeordnet. Jede dieser Aussparungen ist kleiner als die zugehörige Aufnahmetasche. Die einzelnen Aussparungen weisen beispielsweise jeweils eine rechteckige Form auf. This object is achieved by a for an electric machine, in particular an electric motor, provided rotor with the features of claim 1. The rotor is constructed from a laminated rotor core in which permanent magnets are each held in a receiving pocket with an oblong cross-section, in particular pressed in. At each end of both longitudinal sides of each receiving e- pocket an empty recess is arranged in each case. Overall, each receiving pocket so four recesses are assigned. Each of these recesses is smaller than the associated receiving pocket. The individual recesses each have, for example, a rectangular shape.
Der Vorteil der leeren Aussparungen, welche paarweise an beiden Enden jeder Aufnahmetasche angeordnet sind, liegt insbesondere darin, dass sie Verformungen, welche durch das Einpressen des Permanentmagneten in die Aufnahmetasche entstehen, aufnehmen. Damit wird die Geometrie am Umfang des Rotorblechpaketes durch das Einpressen der Permanentmagnete praktisch nicht beeinflusst. Insbesondere handelt es sich bei dem Durchmesser des Rotorblechpaketes um eine nicht veränderliche Größe. Dies gilt auch in Fällen, in denen die leeren Aussparungen, welche neben den einzelnen Aufnahmetaschen angeordnet sind, keine rechteckige, sondern beispielsweise eine abgerundete Form aufweisen. The advantage of the empty recesses, which are arranged in pairs at both ends of each receiving pocket, is in particular that they absorb deformations, which are caused by the press-fitting of the permanent magnet in the receiving pocket. As a result, the geometry on the circumference of the rotor laminated core is virtually unaffected by the pressing in of the permanent magnets. In particular, the diameter of the rotor lamination stack is a variable which can not be changed. This also applies in cases in which the empty recesses, which are arranged next to the individual receiving pockets, have no rectangular but, for example, a rounded shape.
Gemäß einer vorteilhaften Weiterbildung weist jede Aufnahmetasche an ihren insgesamt vier jeweils einer leeren Aussparung benachbarten Umfangsabschnitten jeweils einen nach innen gerichteten Vorsprung auf, welcher zur Kontaktierung des Permanentmagneten vorgesehen ist. Klemmkräfte zwischen dem Permanentmagneten und dem Rotorblechpaket werden damit hauptsächlich in denjenigen Bereichen des Ro- torblechpaketes übertragen, welche mittels der leeren Aussparungen signifikant nachgiebig gestaltet sind.
Die in Längsrichtung einer Aufnahmetasche gemessene Länge einer leeren Aussparung ist kürzer als die in derselben Richtung gemessene halbe Länge der Aufnahmetasche. Vorzugsweise beträgt die Summe der in Längsrichtung der Aufnahmetasche gemessenen Längen der an einer Längsseite der Aufnahmetaschen angeordneten leeren Aussparungen mindestens 15% und höchstens 35% der in derselben Richtung gemessenen Länge der Aufnahmetasche. According to an advantageous development, each receiving pocket has at its four peripheral portions each adjacent to an empty recess in each case an inwardly directed projection which is provided for contacting the permanent magnet. Clamping forces between the permanent magnet and the rotor lamination stack are thus transferred mainly in those areas of the rotor lamination stack, which are designed to be significantly yielding by means of the empty recesses. The length of an empty recess measured in the longitudinal direction of a receiving pocket is shorter than the half length of the receiving pocket measured in the same direction. Preferably, the sum of the lengths measured in the longitudinal direction of the receiving pocket of the arranged on a longitudinal side of the receiving pockets empty recesses is at least 15% and at most 35% of the measured in the same direction length of the receiving pocket.
In bevorzugter Ausgestaltung erstrecken sich die länglichen Querschnitte der Aufnahmetaschen in Radialrichtung des Rotorblechpakets. Insgesamt ist damit eine sternförmige Anordnung der Aufnahmetaschen gegeben. In a preferred embodiment, the elongated cross sections of the receiving pockets extend in the radial direction of the rotor lamination stack. Overall, this gives a star-shaped arrangement of the receiving pockets.
Zwischen zwei in Umfangsrichtung benachbarten Aufnahmetaschen ist gemäß einer vorteilhaften Ausgestaltung jeweils eine längliche, ebenfalls in Radialrichtung ausgerichtete Zusatzaussparung angeordnet. Die leeren, länglichen Zusatzaussparungen fungieren als flussleitende Freimachungen innerhalb des Rotorblechpaketes. In untergeordnetem Maße dienen sie auch der Aufnahme von Verformungen, welche durch das Einpressen der Permanentmagnete, beispielsweise Seltenerdmagnete, in die Aufnahmetaschen verursacht werden. Between two circumferentially adjacent receiving pockets each an elongated, also aligned in the radial direction additional recess is arranged according to an advantageous embodiment. The empty, elongated additional recesses act as flux-conducting clearances within the rotor laminated core. To a lesser extent, they also serve to absorb deformations which are caused by the pressing in of the permanent magnets, for example rare earth magnets, into the receiving pockets.
Die in Radialrichtung gemessene Länge jeder Zusatzaussparung beträgt vorzugsweise mindestens 65% und höchstens 95% der in derselben Richtung gemessenen Länge jeder mit einem Permanentmagneten bestückten Aufnahmetasche. The radially measured length of each additional recess is preferably at least 65% and at most 95% of the length measured in the same direction of each receiving pocket equipped with a permanent magnet.
Die in Tangentialrichtung des Rotorblechpakets gemessene Breite jeder leeren Zu- satzaussparung beträgt vorzugsweise mindestens 20% und höchstens 40% der in derselben Richtung gemessenen Breite jeder Aufnahmetasche. The width of each empty additional recess measured in the tangential direction of the rotor laminated core is preferably at least 20% and at most 40% of the width measured in the same direction of each receiving pocket.
Innerhalb des Querschnitts des Rotorblechpakets sind beispielsweise jeweils acht Aufnahmetaschen und acht Zusatzaussparungen gleichförmig verteilt. Der Winkelab- stand zwischen zwei benachbarten Aufnahmetaschen beträgt dementsprechend 45°,
wobei die Zusatzaussparungen jeweils mittig zwischen zwei Aufnahmetaschen angeordnet sind. Within the cross section of the rotor laminated core, for example, eight receiving pockets and eight additional recesses are distributed uniformly. The angular distance between two adjacent receiving pockets is accordingly 45 °, wherein the additional recesses are each arranged centrally between two receiving pockets.
Der Rotor ist für die Verwendung in einem bürstenlosen Elektromotor geeignet. Bei- spielsweise handelt es sich hierbei um einen Elektromotor eines elektrischen No- ckenwellenverstellers oder einer Vorrichtung zur Variation des Verdichtungsverhältnisses eines Hubkolbenmotors. The rotor is suitable for use in a brushless electric motor. For example, this is an electric motor of an electric camshaft adjuster or a device for varying the compression ratio of a reciprocating piston engine.
Nachfolgend werden zwei Ausführungsbeispiele der Erfindung anhand einer Zeich- nung näher erläutert. Hierin zeigen: In the following, two exemplary embodiments of the invention will be explained in more detail with reference to a drawing. Herein show:
Fig. 1 ein erstes Ausführungsbeispiel eines Permanentmagnetrotors, 1 shows a first embodiment of a permanent magnet rotor,
Fig. 2 ein Detail des Rotors nach Fig. 1 , FIG. 2 shows a detail of the rotor according to FIG. 1, FIG.
Fig. 3 ausschnittsweise ein zweites Ausführungsbeispiel eines Permanentmagnetrotors. Fig. 3 shows a detail of a second embodiment of a permanent magnet rotor.
Die folgenden Erläuterungen beziehen sich, soweit nicht anders angegeben, auf beide Ausführungsbeispiele. Einander entsprechende oder prinzipiell gleichwirkende Teile sind in allen Figuren mit den gleichen Bezugszeichen gekennzeichnet. Unless otherwise indicated, the following explanations refer to both embodiments. Corresponding or basically equivalent parts are indicated in all figures with the same reference numerals.
Ein insgesamt mit dem Bezugszeichen 1 gekennzeichneter Rotor ist als Permanentmagnetrotor ausgebildet und zur Verwendung in einem bürstenlosen Gleichstrommo- tor (BDLC-Motor) vorgesehen. Der Elektromotor ist ausgangsseitig mit einem nicht dargestellten Stellgetriebe gekoppelt, welches der Verstellung einer Nockenwelle eines Verbrennungsmotors oder einer Excenterwelle dient. Im Falle einer Excenterwelle ist an diese ein Nebenpleuel angelenkt, welches mit weiteren Komponenten eines Kurbeltriebs eines Hubkolbenmotors derart zusammenwirkt, das dessen Verdich- tungsverhältnis verstellbar ist.
Der Rotor 1 umfasst eine Vielzahl an Rotorblechen 3, welche zusammen ein Rotorblechpaket bilden. In den Rotorblechen 3 befinden sich im Querschnitt längliche Aufnahmetaschen 2, in welche Magnete 4, nämlich Permanentmagnete, eingepresst sind. Sämtliche Aufnahmetaschen 2 sind in Radialrichtung des Rotors 1 ausgerichtet. Die einzelnen Permanentmagnete 4 weisen jeweils eine Quaderform auf. A designated generally by the reference numeral 1 rotor is designed as a permanent magnet rotor and for use in a brushless DC motor (BDLC motor) provided. The electric motor is coupled on the output side with an actuating drive, not shown, which serves to adjust a camshaft of an internal combustion engine or an eccentric shaft. In the case of an eccentric shaft, a secondary connecting rod is articulated to it, which cooperates with other components of a crank mechanism of a reciprocating piston engine in such a way that its compression ratio is adjustable. The rotor 1 comprises a plurality of rotor laminations 3, which together form a rotor laminations. In the rotor laminations 3 are in cross section elongated receiving pockets 2, in which magnets 4, namely permanent magnets, are pressed. All receiving pockets 2 are aligned in the radial direction of the rotor 1. The individual permanent magnets 4 each have a cuboid shape.
Jeweils zwischen zwei in Umfangsrichtung benachbarten Aufnahmetaschen 2 befindet sich eine ebenfalls längliche, in Radialrichtung ausgerichtete Zusatzaussparung 5. Die in Radialrichtung des Rotors gemessene Länge der Zusatzaussparung 5 ist mit Lzus, die in tangentialer Richtung gemessene Breite der Zusatzaussparung 5 mit Bz bezeichnet. Mit Lges ist die in Radialrichtung gemessene Länge der Aufnahmetasche 2, mit BA deren in Tangentialrichtung gemessene Breite bezeichnet. An den beiden Enden jeder Längsseite der im Wesentlichen rechteckigen Aufnahmetasche 2 befindet sich eine vergleichsweise kleine leere Aussparung 6. Insgesamt ist die Aufnahmetasche 2 damit von vier leeren Aussparungen 6 umgeben, welche jeweils rechteckig geformt sind. Die Längsseiten der leeren Aussparungen 6 sind hierbei parallel zu den Längsseiten der Aufnahmetasche 2 angeordnet. Die in Radialrichtung des Rotors 1 gemessene Länge der beiden neben einer Längsseite der Aufnahmetasche 2 ange- ordneten Aussparungen 6 ist mit Li, L2 bezeichnet. In den Ausführungsbeispielen sind die Längen Li , L2 aller Aussparungen 6 identisch. Die Summe aus der Länge Li einer ersten Aussparung 6 an einer bestimmten Längsseite der der Aufnahmetasche 2 und der Länge L2 der zweiten an dieser Längsseite angeordneten Aussparung 6 beträgt mehr als 15% und weniger als 35% der Länge Lges der Aufnahmetasche 2. In each case between two circumferentially adjacent receiving pockets 2 is also a longitudinal, aligned in the radial direction additional recess 5. The measured in the radial direction of the rotor length of the additional recess 5 is denoted by Lzus, measured in the tangential direction width of the additional recess 5 with Bz. Lges is the length of the receiving pocket 2 measured in the radial direction, BA denotes their width measured in the tangential direction. At the two ends of each longitudinal side of the substantially rectangular receiving pocket 2 is a comparatively small empty recess 6. Overall, the receiving pocket 2 is thus surrounded by four empty recesses 6, which are each rectangular in shape. The longitudinal sides of the empty recesses 6 are in this case arranged parallel to the longitudinal sides of the receiving pocket 2. The length, measured in the radial direction of the rotor 1, of the two recesses 6 arranged next to a longitudinal side of the receiving pocket 2 is denoted by Li, L2. In the embodiments, the lengths Li, L2 of all recesses 6 are identical. The sum of the length Li of a first recess 6 at a certain longitudinal side of the receiving pocket 2 and the length L2 of the second arranged on this longitudinal side recess 6 is more than 15% and less than 35% of the length L tot of the receiving pocket. 2
Im Ausführungsbeispiel nach den Fig. 1 und 2 weist jede Aufnahmetasche 2 einen rechteckigen Querschnitt auf. Jeder in eine Aufnahmetasche 2 eingepresste Magnet 4 liegt hierbei - abgesehen von eventuellen Verrundungen an den Kanten des Magneten 4 und/oder an den Ecken der Aufnahmetasche 2 - an den gesamten Längsseiten der Aufnahmetasche 2 an.
Im Unterschied hierzu weist in der Ausführungsform nach Fig. 3 jede Aufnahmetasche 2 insgesamt vier Vorsprünge 7 auf, welche jeweils ins Innere der Aufnahmetasche 2 gerichtet sind und sich in denjenigen Abschnitten der Längsseiten der Aussparung 2 befinden, welchen jeweils eine leere Aussparung 6 benachbart ist. In diesem Fall wirken hauptsächlich am radial inneren sowie am radial äußeren Ende der Aufnahmetasche 2 Klemmkräfte zwischen dem Magneten 4 und dem Rotorblech 3. In diesen Bereichen durch den gegebenen Klemmverband entstehende Verformungen werden durch die leeren Aussparungen 6 aufgenommen, ohne die Außenkonturen des Rotorblechs 3 zu verändern.
In the embodiment according to FIGS. 1 and 2, each receiving pocket 2 has a rectangular cross-section. Each magnet 4 pressed into a receiving pocket 2 rests against the entire longitudinal sides of the receiving pocket 2, apart from possible rounding off at the edges of the magnet 4 and / or at the corners of the receiving pocket 2. In contrast to this, in the embodiment according to FIG. 3, each receiving pocket 2 has a total of four projections 7, which are each directed into the interior of the receiving pocket 2 and are located in those sections of the longitudinal sides of the recess 2, which are each adjoined by an empty recess 6. In this case, acting on the radially inner and at the radially outer end of the receiving pocket 2 clamping forces between the magnet 4 and the rotor plate 3. In these areas by the given clamping association resulting deformations are absorbed by the empty recesses 6, without the outer contours of the rotor blade 3 change.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Rotor 1 rotor
2 Aufnahm etasche 2 receiving pocket
3 Rotorblech 3 rotor plate
4 Magnet 4 magnet
5 Zusatzaussparung 5 additional recess
6 leere Aussparung 6 empty recess
7 Vorsprung 7 lead
Bz in Tangentialnchtung gemessene Breite der ZusatzaussparungBz measured in Tangentialnchtung width of the additional recess
BA in Tangentialnchtung gemessene Breite der AufnahmetascheBA in Tangentialnchtung measured width of the receiving pocket
Li , l_2 Längen der Aussparungen Li, l_2 lengths of the recesses
Lges in Radialrichtung gemessene Länge der Aufnahmetasche Lges Radially measured length of the receiving pocket
Lzus, in Radialrichtung gemessene Länge der Zusatzaussparung
Lzus, length of additional recess measured in radial direction
Claims
1. Rotor eines Elektromotors, mit einem aus einzelnen Rotorblechen (3) gebildeten Rotorblechpaket, in welchem Magnete (4) in Aufnahmetaschen (2) mit länglichem Querschnitt gehalten sind, wobei jeder Aufnahmetasche (2) mindestens eine leere Aussparung (6) benachbart ist, dadurch gekennzeichnet, dass an jedem Ende beider Längsseiten jeder Aufnahmetasche (2) jeweils eine leere Aussparung (6) angeordnet ist. 1. rotor of an electric motor, with a rotor lamination formed from individual rotor laminations (3), in which magnets (4) are held in receiving pockets (2) with an oblong cross-section, each receiving pocket (2) being adjacent at least one empty recess (6), characterized in that at each end of both longitudinal sides of each receiving pocket (2) each have an empty recess (6) is arranged.
2. Rotor nach Anspruch 1 , dadurch gekennzeichnet, dass jede Aufnahmetasche (2) an ihren insgesamt vier jeweils einer leeren Aussparung (6) benachbarten Umfangsabschnitten jeweils einen nach innen gerichteten Vorsprung (7) aufweist. 2. Rotor according to claim 1, characterized in that each receiving pocket (2) at their four in each case an empty recess (6) adjacent peripheral portions each having an inwardly directed projection (7).
3. Rotor nach Anspruch 1 , dadurch gekennzeichnet, dass jede Aufnahmetasche (2) einen rechteckigen Querschnitt beschreibt. 3. Rotor according to claim 1, characterized in that each receiving pocket (2) describes a rectangular cross-section.
4. Rotor nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Summe der in Längsrichtung der Aufnahmetasche (2) gemessenen Längen (Li, L2) der an einer Längsseite der Aufnahmetaschen (2) angeordneten leeren Aussparungen (6) mindestens 15% und höchstens 35% der in derselben Richtung gemessenen Länge (Lges) der Aufnahmetasche (2) beträgt. 4. Rotor according to claim 2 or 3, characterized in that the sum of the longitudinal direction of the receiving pocket (2) measured lengths (Li, L2) on a longitudinal side of the receiving pockets (2) arranged empty recesses (6) at least 15% and at most 35% of the measured in the same direction length (L ges ) of the receiving pocket (2).
5. Rotor nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass sich die länglichen Querschnitte der Aufnahmetaschen (2) in Radialrichtung des Rotorblechpakets erstrecken. 5. Rotor according to one of claims 2 to 4, characterized in that extending the elongate cross sections of the receiving pockets (2) in the radial direction of the rotor core.
6. Rotor nach Anspruch 5, dadurch gekennzeichnet, dass zwischen zwei in Umfangsrichtung benachbarten Aufnahmetaschen (2) jeweils eine längliche, ebenfalls in Radialrichtung ausgerichtete Zusatzaussparung (5) angeordnet ist. 6. Rotor according to claim 5, characterized in that between two circumferentially adjacent receiving pockets (2) each have an elongated, also aligned in the radial direction additional recess (5) is arranged.
7. Rotor nach Anspruch 6, dadurch gekennzeichnet, dass die in Radialrichtung gemessene Länge (Lzus) jeder Zusatzaussparung (5) mindestens 65% und höchstens 95% der Länge (Lges) jeder Aufnahmetasche (2) beträgt. 7. Rotor according to claim 6, characterized in that the measured in the radial direction length (Lzus) of each additional recess (5) is at least 65% and at most 95% of the length (L ges ) of each receiving pocket (2).
8. Rotor nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die in Tangen- tialrichtung des Rotorblechpakets gemessene Breite (Bz) jeder Zusatzausspa-
rung (5) mindestens 20% und höchstens 40% der Breite (BA) jeder Aufnahmetasche (2) beträgt. 8. Rotor according to claim 6 or 7, characterized in that the width (Bz) measured in the tangential direction of the rotor lamination stack of each additional recess (5) at least 20% and not more than 40% of the width (BA) of each receiving pocket (2).
9. Rotor nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass im Querschnitt des Rotorblechpakets jeweils acht Aufnahmetaschen (2) und Zusatzaussparungen (5) gleichförmig verteilt sind. 9. Rotor according to one of claims 6 to 8, characterized in that in the cross section of the rotor laminated core each eight receiving pockets (2) and additional recesses (5) are uniformly distributed.
10. Verwendung eines Rotors nach Anspruch 1 in einem Elektromotor eines Stellantriebs eines Verbrennungsmotors, nämlich eines elektrischen Nockenwellen- verstellers oder einer Vorrichtung zur Variation des Verdichtungsverhältnisses eines Hubkolbenmotors.
10. Use of a rotor according to claim 1 in an electric motor of an actuator of an internal combustion engine, namely an electric camshaft adjuster or a device for varying the compression ratio of a reciprocating engine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016223976.7 | 2016-12-01 | ||
| DE102016223976.7A DE102016223976A1 (en) | 2016-12-01 | 2016-12-01 | Rotor of an electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018099507A1 true WO2018099507A1 (en) | 2018-06-07 |
Family
ID=60190523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2017/100898 WO2018099507A1 (en) | 2016-12-01 | 2017-10-18 | Rotor of an electric motor |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102016223976A1 (en) |
| WO (1) | WO2018099507A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1009085B1 (en) | 1992-08-12 | 2005-12-21 | Seiko Epson Corporation | Permanent magnet rotor of brushless motor and production method thereof |
| US20070252469A1 (en) * | 2006-04-19 | 2007-11-01 | Asmo Co., Ltd. | Embedded magnet type rotating electric machine |
| DE102006056873A1 (en) | 2006-12-01 | 2008-06-05 | Siemens Ag | Permanent magnet rotor with bends for fixing the permanent magnets of the rotor package |
| EP2975730A1 (en) * | 2014-07-17 | 2016-01-20 | Siemens Aktiengesellschaft | Rotor package of a rotating electric machine |
| WO2016037983A1 (en) | 2014-09-08 | 2016-03-17 | Continental Automotive Gmbh | Method for producing a rotor unit of a permanently excited synchronous motor, and rotor unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010200480A (en) * | 2009-02-25 | 2010-09-09 | Denso Corp | Embedded magnetic motor |
| CN102377257B (en) * | 2010-08-10 | 2016-03-30 | 德昌电机(深圳)有限公司 | Brushless electric machine |
| FR2982093B1 (en) * | 2011-10-27 | 2017-11-03 | Valeo Equip Electr Moteur | ROTOR OF ROTATING ELECTRIC MACHINE AND ROTATING ELECTRIC MACHINE COMPRISING A ROTOR |
| EP2793364B1 (en) * | 2013-04-16 | 2016-03-23 | Siemens Aktiengesellschaft | Single segment rotor with demagnetised inner side and manufacturing method |
| JP6083523B2 (en) * | 2013-05-21 | 2017-02-22 | 日本電産株式会社 | Rotor and motor |
| DE102013218490A1 (en) * | 2013-09-16 | 2015-03-19 | Mahle International Gmbh | Rotor for an electric machine |
-
2016
- 2016-12-01 DE DE102016223976.7A patent/DE102016223976A1/en not_active Withdrawn
-
2017
- 2017-10-18 WO PCT/DE2017/100898 patent/WO2018099507A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1009085B1 (en) | 1992-08-12 | 2005-12-21 | Seiko Epson Corporation | Permanent magnet rotor of brushless motor and production method thereof |
| US20070252469A1 (en) * | 2006-04-19 | 2007-11-01 | Asmo Co., Ltd. | Embedded magnet type rotating electric machine |
| DE102006056873A1 (en) | 2006-12-01 | 2008-06-05 | Siemens Ag | Permanent magnet rotor with bends for fixing the permanent magnets of the rotor package |
| EP2975730A1 (en) * | 2014-07-17 | 2016-01-20 | Siemens Aktiengesellschaft | Rotor package of a rotating electric machine |
| WO2016037983A1 (en) | 2014-09-08 | 2016-03-17 | Continental Automotive Gmbh | Method for producing a rotor unit of a permanently excited synchronous motor, and rotor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016223976A1 (en) | 2018-06-07 |
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