EP3465876A1 - Rotorkern mit verwendung von dauermagneten bzw. elektrische maschine mit verwendung dieses rotorkerns - Google Patents
Rotorkern mit verwendung von dauermagneten bzw. elektrische maschine mit verwendung dieses rotorkernsInfo
- Publication number
- EP3465876A1 EP3465876A1 EP17720384.1A EP17720384A EP3465876A1 EP 3465876 A1 EP3465876 A1 EP 3465876A1 EP 17720384 A EP17720384 A EP 17720384A EP 3465876 A1 EP3465876 A1 EP 3465876A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recess
- permanent magnet
- face
- rotor
- rotor core
- 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
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
- H02K1/27—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
-
- 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
Definitions
- the invention relates to a rotor core.
- the invention further relates to a rotor with such a rotor core, an electric machine with such a rotor and a vehicle with such a machine.
- the rotor is made with a set of openings arranged in a V-shaped configuration which opens towards the outer circumference around the permanent magnets, each having the same rectangular cross-sectional profile along its length and in the
- Axial direction along the rotor axis to take firmly by allowing their corners are inserted into the set of openings.
- each set include magnet openings adapted to receive and enclose the permanent magnets of the respective pair, first openings located above each of the permanent magnets and separated from each other in the direction of its width and serving as external flux barriers prevent the
- Magnetic flux around the permanent magnet rotates, and second openings, which are located between the permanent magnets of each pair and serve as internal flux barriers.
- Between the second apertures of each pair is a central bridge extending in a radial direction from the rotor axis to connect the inner and outer edges defining the aperture to form the permanent magnets against the centrifugal force which is generated. when the rotor is rotating at a high speed, hold in position.
- the internal flux barriers are several times larger than the outer flux barriers.
- the rotor effectively splits and separates the magnetic flux lines of the stator windings into two through the large internal flux barriers and through a center groove per magnetic pole on the outer circumference of the rotor. This causes the rotor to effectively produce a reluctance torque and the
- Torque ripple is limited while the torque is improved.
- the invention has the object, in a rotor of a permanent magnet-excited electric machine of the type described to further reduce the torque ripple and to increase the mean torque.
- each magnetic pole of the rotor at least two permanent magnets, which in a "V-shaped
- the rotor core designed according to the invention thus has two or more permanent magnets per magnetic pole of the rotor, of which a part or all, but at least two, are arranged in the "V-shaped configuration."
- the permanent magnets are seen in a radial plane of the rotor of at least In the case of the rectangular cross-section of the permanent magnets, two pole faces and two are preferred, in the axial direction of the rotor at least almost over the axial length of the rotor core Side surfaces formed, wherein the permanent magnets are designed "flat", ie, the pole faces have a larger dimension than the side surfaces.
- the pole faces of like poles of two permanent magnets face one another, whereas each side face points radially inward and radially outward, ie, the latter faces the rotor outer surface.
- Each one of these outwardly directed side surfaces is followed by one of the inventively designed recesses and extends to the rotor outer surface down to a connecting web of the magnetically conductive material of the rotor core;
- Connecting bar separates the recess from the rotor outer surface.
- the recess takes in a rough approximation a four-sided shape, i. their boundary is divided into four sections:
- a third section faces in the circumferential direction the outside of the "V-shaped design of the permanent magnets and with a constriction or
- Constriction or reduction or narrowing of the recess designed which forms a support shoulder on which the permanent magnet with a portion, in particular end portion, its radially outwardly facing side surface is supported, in particular against centrifugal forces;
- a fourth section faces the interior of the V-shaped configuration of the permanent magnets in the circumferential direction and is formed with a formation, ie a bulge, through which the recess expands towards the interior of the V-shaped configuration, i. is enlarged, and this protrudes beyond the inside of the "V-shaped design-facing pole face of the permanent magnet, that is, over a plane which is spanned by this pole face or in which this pole face lies out.
- This third and fourth section of the boundary of the recess are preferably designed to a predominant portion of their extensions not rectilinear, but rounded, as will be explained in more detail below.
- the recesses are arranged and designed to permanent magnets of the same "V-shaped configuration symmetrical to a radial center axis of this" V-shaped design.
- the invention enables the design of a rotor core, the high mechanical strength and a good distribution of mechanical stresses during operation and a very low torque ripple and thus a great smoothness with less
- the magnetic flux can be controlled to achieve improved utilization of the mass of the material of the rotor core as well as that of the permanent magnets therein, i. Regions of the rotor core that are not or only slightly penetrated by the magnetic flux during operation are still further excluded from training with the material of the rotor core. It is by the
- Impression i. Supporting shoulder, achieved a positive and positive, effective fixation of the permanent magnets in the rotor core.
- the recesses very effectively prevent or at least reduce a magnetic short circuit between the poles of the permanent magnets.
- the magnetic flux of the permanent magnets is very cheap, targeted and effectively directed into the stator of the electric machine, which contributes to reducing the noise.
- the so-called Vollpolmoment is increased, so that a particularly high power can be delivered while allowing a high electromotive force.
- the connecting webs effectively absorb the mechanical loads that occur.
- a maximum length of the recess between the side surface of the permanent magnet and the end face of the recess is located on the edge facing the indentation of the recess, ie, facing the exterior of the "V-shaped design", and that • A smallest length of the recess between the side surface of the permanent magnet and the end face of the recess is located on the edge facing the formation of the recess, that is, facing the interior of the "V-shaped design" is located.
- the edge of the recess facing the indentation or support shoulder forms, in other words, the indentation or support shoulder or is in contact with the indentation or
- the shape of the edge of the recess forms the formation, i. This boundary is designed with the shaping.
- the roughly four-sided shape of the recess then forms an oblique quadrilateral with the four sections of the boundary described above, which opens to the exterior of the "V-shaped" design.
- the recess the largest possible area of the radial cross-sectional area of the rotor core is covered by the recess, i. the
- Recess extends over as large a proportion of the radial cross-sectional area of the rotor core and thus contributes to a reduction in the mass of the rotor core. At the same time, this embodiment of the recess contributes to an even better control of the magnetic flux and thus to a further increase in the average torque and a further reduction of the torque ripple.
- Recess has an at least almost constant or to the interior of the "V-shaped design towards decreasing, determined in the radial direction of the rotor core width and that
- the angle between the side surface of the permanent magnet and the end face of the recess thus results on the one hand by a predetermined taper of the connecting web between its widest and its narrowest point or if the front side is at least almost parallel to the rotor outer surface or one to the rotor outer surface in the region of the recess extends tangential direction, by the extension direction of the connecting web, on the other hand by a curvature of the rotor outer surface and the position and inclination of the permanent magnets of the "V-shaped design in the rotor core Width of the connecting web and, if necessary, their taper by the mechanical stresses to be absorbed during operation, in order to save material of the rotor core and possibly to achieve the lowest possible magnetic conductivity in this area for
- the width of the connecting bridge is chosen as low as possible.
- the formation is radiused with a radius that is at least almost twice the smallest length of the recess between the side surface of the permanent magnet and the end face of the recess.
- the indentation is radiused with a radius
- o is at least almost half of the smallest length of the recess between the side surface of the permanent magnet and the end face of the recess, o is particularly preferably at least almost equal to the radius with which the
- Forming is rounded.
- ⁇ is particularly preferably at least almost equal to 0.9 times this maximum length.
- the rotor core is characterized in that
- o is at least almost 0.3 times the smallest length of the recess between the side surface of the permanent magnet and the end face of the recess, o optionally at least almost equal to 0.2 times the largest length of the
- a permanent magnet excited electric machine which is characterized by a rotor of the aforementioned type and / or by a rotor core of the above-described design.
- a machine is preferably used for traction drives of vehicles, in particular road vehicles with electric drives, preferably battery-powered drives.
- the machine according to the invention allows operation at high speeds, has a high average torque and at most only a very small torque ripple. This not only improves the traction, but also the noise can be reduced, whereby the ride comfort and performance of such equipped
- Vehicle can be increased.
- the dimensions of the recesses can be adapted to different designs and
- the recesses according to the invention direct the magnetic flux from the two permanent magnets of the V-shaped design in addition to an amplified and homogenized magnetic field or a reinforced and homogenized magnetic flux in the stator of the electric machine, which in addition to a reduction of
- the invention as the minimum magnet arrangement per magnetic pole underlying "V-shaped design of the two permanent magnets can be optionally supplemented by further permanent magnets.
- a third permanent magnet tangentially arranged along the circumferential direction of the rotor core at least nearly midway of the V-shaped configuration may be added per magnetic pole and thus to each of the V-shaped configurations of the two permanent magnets from the two permanent magnets of the "V-shaped design in this magnet arrangement in addition to an amplified magnetic field or an amplified magnetic flux in front of the third permanent magnet, which also increases the Vollpolmoment.
- FIG. 1 shows a representation of a rotor core in a roughly schematic, axial view with three permanent magnets per magnetic pole
- FIG. 2 is a fragmentary, roughly schematic representation of the rotor core of FIG.
- FIG. 3 shows an enlarged detail of the illustration of the rotor core according to FIG. 2 with a detailed reproduction of one of the recesses according to FIG.
- the reference numeral 100 designates a rotor core as used as a basis for the embodiments of the invention explained below.
- the rotor core 100 is reproduced in an axial view, ie a view in the direction of a rotation axis 110 of the rotor core 100 and thus a rotor constructed with this
- the rotor core 100 here has, for example, ten magnetic poles.
- three permanent magnets 101, 102, 103 are provided, of which two 101, 102 in a "V-shaped configuration 101, 102 which extend to a rotor outer surface 104, ie radially outward opens, and the third 103 are arranged tangentially along a circumferential direction 105 and thus along the rotor outer surface 104 of the rotor core 100 at least almost centrally to a radial center axis 106 of the "V-shaped configuration 101, 102. All
- Permanent magnets 101, 102, 103 are - as far as the mechanical stability of the rotor core 100th allows - moved close to the rotor outer surface 104.
- Rotor core 100 covers the "V-shaped configuration 101, 102, ie the configuration of the first 101 and the second 102 of the two permanent magnets 101, 102, an angular range 107, which is equal to the pole pitch of the rotor core 100.
- the transitions of each two adjacent, two adjacent the magnetic poles associated and in the circumferential direction 105 of the "V-shaped configuration 101, 102 covered angle ranges 107, ie the locations where each two of the triangular arrays of permanent magnets 101, 102, 103 adjoin in the circumferential direction 105 of the rotor core 100 are indicated by cut lines 108 in FIG.
- the illustration of constructive details of the rotor core 100 is omitted in FIG. 1 and only the arrangement of the permanent magnets 101, 102, 103 relative to the outer circumference of the rotor core 100, i. to the rotor outer surface 104, and the rotor shaft opening 109 reproduced.
- FIG. 2 a part of the cutting edge cut along the section lines 108 in FIG. 1 is shown
- Rotor core 100 i. one of the angular regions 107 with the three permanent magnets 101, 102, 103, enlarged reproduced in a rough schematic representation.
- Rotor outer surface 104 facing side surface 1 15 and 1 16 of the first 101 and the second 102 of the permanent magnets 101, 102 of the "V-shaped design borders. Of these side surfaces 1 15 and 1 16, the recesses extend 1 1 1 and 1 12 to the rotor outer surface 104 out. Opposite the rotor outer surface 104 are the recesses 1 1 1, 1 12 at one end face 1 17 and 1 18 of the respective recess 1 1 1 or 1 12 by a rotor core 100, i. from the material, formed connecting web 1 13 or 1 14 bounded.
- the connecting webs 1 13, 1 14 are designed to be tapered to the radial center axis 106 in along the circumferential direction 105 advantageous.
- Each of the recesses 1 1 1, 1 12 has in a circumferential direction 105 of the rotor core 100 to the outside of the "V-shaped configuration 101, 102 out facing boundary 1 19 and 120 as a support shoulder for the first and second permanent magnet 101 and 102 configured indentation 121 and 122, respectively.
- each of the recesses 1 1 1, 1 12 each have a formation 125 and 126, respectively.
- These protrusions 125, 126 each project beyond a plane of a pole surface 127, 128 of the permanent magnets 101, 102 facing the interior of the "V" shaped configuration 101, 102, toward the interior of the "V” shaped configuration 101, 102.
- the recesses 1 1 1, 1 12 are designed and arranged symmetrically with respect to the radial center axis 106. In the axial direction of the rotor core 100, i. in the direction of the axis of rotation 1 10, the recesses 1 1 1, 1 12 extend with constant
- FIG. 3 shows an enlarged detail from the representation of the rotor core 100 according to FIG. 2 with a detailed reproduction of the first recess 11 1.
- the design of the first recess 11 1 is described in more detail by way of example with reference to FIG.
- the second recess 1 12 of the first mirror image designed so that a separate
- FIG. 3 shows only one recess 129 in the rotor core 100, which is set up and designed to receive the first permanent magnet 101, as well as the position of the side surface 15 of the first permanent magnet 101 facing the rotor outer surface 104.
- a thickness dimension of the first permanent magnet 101 between the pole face 127 of the first permanent magnet 101 facing the inside of the "V-shaped configuration 101, 102 and a pole face 130 of the first permanent magnet 101 facing the exterior of the" V-shaped configuration 101, 102 is designated by 11 ,
- the rotor outer surface 104 facing side surface 1 15 of the first permanent magnet 101 forms with a straight, central portion 131 of the end face 1 17 of the first recess 1 1 1 an acute angle a1.
- the angle ⁇ 1 opens toward the exterior of the V-shaped configuration (101, 102).
- the first recess 1 1 1 forms a skewed quadrilateral, the corners are rounded here, however, as will be explained below.
- this oblique, rounded rectangle has a maximum length 14, which thus has a maximum length 14 of the first recess 1 1 1 between the side surface 15 of the first permanent magnet 101 and the end face 1 17 of the first Recess 1 1 1 forms.
- This largest length 14 is located at that of the indentation, ie support shoulder, 121 facing edge 1 19 of the first recess 1 1 1, ie, facing the exterior of the "V-shaped configuration 101, 102 out.
- Pole surface 127, 130 measured, located at the Form 125 facing
- This measure 15 is according to the invention 5 to 20%, the thickness 11 of the first permanent magnet 101 between the interior of the "V-shaped configuration 101, 102 facing pole surface 127 of the first permanent magnet 101 and the outer surface of the V-shaped configuration 101, 102 facing pole surface 130 of the first permanent magnet 101st Particularly preferably and as shown in FIG. 3, the dimension 15 is at least almost 10% of the thickness dimension 11 of the first permanent magnet 101.
- the formation 125 is rounded with a radius R2, which is at least almost twice the smallest length 17 of the first recess 1 1 1 between the side surface 15 of the first permanent magnet 101 and the end face 1 17 of the first Recess 1 1 1.
- the measure 15 is then determined as the maximum measure at the apex of this fillet with the radius R2.
- the indentation 121 jumps from the outer surface of the V-shaped configuration 101, 102 facing pole face 130 of the first permanent magnet 101 to the interior of the "V-shaped configuration 101, 102 maximum, i. at a vertex of the indentation, by a measure 16 back, according to the invention 10 to 40%, preferably 20 to 30%, more preferably at least almost 27%, the thickness 11 of the first permanent magnet 101 and is accordingly removed in Figure 3.
- the indentation 121 is rounded, with a radius R3, the at least almost half of the smallest length 17 of the first recess 1 1 1 between the side surface 15 of the first permanent magnet 101 and the end face 1 17 of the first
- Recess 1 1 1 Particularly preferred is the radius R3, with which the indentation 121 is rounded, at least almost equal to the radius R2, with which the formation 125 is rounded. This too is in the embodiment of Figure 3 in this way
- this fillet has a radius R4.
- the radius R4 is measured according to the invention at least almost four thirds of the smallest length 17 of the first recess 1 1 1 between the side surface 1 15 of the first permanent magnet 101 and the end face 1 17 of the first recess 1 1 1.
- the radius R4 can also be sized be that it is at least almost equal to the largest length 14 of the first recess 1 1 1 between the side surface 1 15 of the first permanent magnet 101 and the end face 1 17 of the first recess 1 1 1.
- the radius R4 is at least nearly equal to 0.9 times this largest length 14.
- the fillet has a radius R1.
- the radius R1 is
- the radius R1 can also be such that it is at least almost equal to 0.2 times the largest length 14th the first recess 1 1 1 between the side surface 1 15 of the first permanent magnet 101 and the end face 1 17 of the first recess 1 1 1.
- the first permanent magnet 101 Parallel to the pole face 127, 130 and thus at right angles to its thickness 11, the first permanent magnet 101 has a width 13. Further, the first recess 1 1 1 parallel z the thickness 11 of the first permanent magnet 101 has a largest width 12, which consists of the thickness dimension 11, the dimension 15 by which the formation 125, the pole face 127 of the first permanent magnet 101 to the interior of the " V-shaped configuration 101, 102, ie to the radial center axis 106, towards maximum projected, and the dimension 16, by which the support shoulder 121 from the pole face 130 to the interior of the "V-shaped configuration 101, 102 out maximally determined determined.
- the thickness dimension 11 of the first permanent magnet 101 is only at most 10%, preferably at least almost exactly 8%, larger than the largest width 12 of the first recess 1 1 1.
- a magnetically conductive rotor core of a rotor of a permanent magnet electric machine proposed for low torque ripple and high torque per magnetic pole of the rotor two permanent magnets in the rotor outer surface toward opening "V-shaped design and to each permanent magnet one of whose Rotor outer surface facing side surface adjacent, extending to the rotor outer surface and thereof by a
- Connecting web berandete recess comprises.
- Each of the recesses has in a circumferential direction of the rotor core to the outside of the "V-shaped design pointing out their boundaries a support shoulder for the permanent magnet and in a direction of the interior of the" V-shaped design out facing their boundaries on a formation.
- the formation projects beyond a plane of a pole face of the permanent magnet facing the interior of the "V-shaped design” toward the interior of the "V-shaped design”.
- Rotor outer surface i. outer circumference of 100
- Cutting lines designate transitions of each two adjacent
- FIG. 16 shows a measure by which the 121 in FIG. 19 springs back a maximum from the pole face 130 to the interior of the V-shaped configuration 101, 102
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016209709.1A DE102016209709A1 (de) | 2016-06-02 | 2016-06-02 | Rotorkern |
| PCT/EP2017/058910 WO2017207158A1 (de) | 2016-06-02 | 2017-04-13 | Rotorkern mit verwendung von dauermagneten bzw. elektrische maschine mit verwendung dieses rotorkerns |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3465876A1 true EP3465876A1 (de) | 2019-04-10 |
Family
ID=58645016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17720384.1A Ceased EP3465876A1 (de) | 2016-06-02 | 2017-04-13 | Rotorkern mit verwendung von dauermagneten bzw. elektrische maschine mit verwendung dieses rotorkerns |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3465876A1 (de) |
| CN (1) | CN109314419A (de) |
| DE (1) | DE102016209709A1 (de) |
| WO (1) | WO2017207158A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019206088A1 (de) * | 2019-04-29 | 2020-10-29 | Volkswagen Aktiengesellschaft | Rotorblech, insbesondere Blechschnitt, für einen Rotor einer elektrischen Maschine und elektrische Maschine |
| DE102019117364A1 (de) * | 2019-06-27 | 2020-12-31 | Valeo Siemens Eautomotive Germany Gmbh | Rotor für eine elektrische Maschine, elektrische Maschine für ein Fahrzeug und Fahrzeug |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070063607A1 (en) * | 2005-09-21 | 2007-03-22 | Toyota Jidosha Kabushiki Kaisha | Permanent magnet type rotating electric machine capable of suppressing deformation of rotor core |
| EP2613426A1 (de) * | 2010-09-02 | 2013-07-10 | Sumitomo Bakelite Co., Ltd. | Fixierung einer harzzusammensetzung zur verwendung in einem rotor |
| US20140217849A1 (en) * | 2013-02-07 | 2014-08-07 | Honda Motor Co., Ltd. | Rotor for rotary electric machine |
| WO2014156678A1 (ja) * | 2013-03-29 | 2014-10-02 | 株式会社小松製作所 | 電動機 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006254629A (ja) * | 2005-03-11 | 2006-09-21 | Toyota Motor Corp | 回転電機のロータ、回転電機、車両駆動装置 |
| JP2009153236A (ja) * | 2007-12-18 | 2009-07-09 | Toyota Central R&D Labs Inc | 回転電機の回転子及び回転電機 |
| JP5935615B2 (ja) * | 2012-09-14 | 2016-06-15 | 株式会社デンソー | 回転電機のロータ |
| JP2014072995A (ja) | 2012-09-28 | 2014-04-21 | Suzuki Motor Corp | Ipm型電動回転機 |
| CN204967578U (zh) * | 2015-09-23 | 2016-01-13 | 渤海大学 | 降低永磁同步电机转矩波动的转子结构 |
-
2016
- 2016-06-02 DE DE102016209709.1A patent/DE102016209709A1/de not_active Withdrawn
-
2017
- 2017-04-13 WO PCT/EP2017/058910 patent/WO2017207158A1/de not_active Ceased
- 2017-04-13 EP EP17720384.1A patent/EP3465876A1/de not_active Ceased
- 2017-04-13 CN CN201780034016.6A patent/CN109314419A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070063607A1 (en) * | 2005-09-21 | 2007-03-22 | Toyota Jidosha Kabushiki Kaisha | Permanent magnet type rotating electric machine capable of suppressing deformation of rotor core |
| EP2613426A1 (de) * | 2010-09-02 | 2013-07-10 | Sumitomo Bakelite Co., Ltd. | Fixierung einer harzzusammensetzung zur verwendung in einem rotor |
| US20140217849A1 (en) * | 2013-02-07 | 2014-08-07 | Honda Motor Co., Ltd. | Rotor for rotary electric machine |
| WO2014156678A1 (ja) * | 2013-03-29 | 2014-10-02 | 株式会社小松製作所 | 電動機 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2017207158A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017207158A1 (de) | 2017-12-07 |
| CN109314419A (zh) | 2019-02-05 |
| DE102016209709A1 (de) | 2017-12-21 |
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