CN109391110B - A disc motor structure - Google Patents
A disc motor structure Download PDFInfo
- Publication number
- CN109391110B CN109391110B CN201710671227.2A CN201710671227A CN109391110B CN 109391110 B CN109391110 B CN 109391110B CN 201710671227 A CN201710671227 A CN 201710671227A CN 109391110 B CN109391110 B CN 109391110B
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- CN
- China
- Prior art keywords
- winding
- end cover
- magnetic steel
- rare earth
- rotating shaft
- 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.)
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Links
- 238000004804 winding Methods 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 44
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 239000000696 magnetic material Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- 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
- H02K1/2793—Rotors axially facing stators
-
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a disc type motor structure which comprises a rotor disc and a rotating shaft, wherein the rotor disc is a rare earth magnetic steel ring, the rare earth magnetic steel ring is fixedly sleeved on the rotating shaft, a left stator disc comprises a left magnet yoke, a left winding and a left end cover, the left magnet yoke is positioned between the left winding and the left end cover, a right stator disc comprises a right magnet yoke, a right winding and a right end cover, the right magnet yoke is positioned between the right winding and the right end cover, the left stator disc and the right stator disc are sleeved at two ends of the rotating shaft, bearings are arranged between the left end cover and the rotating shaft, and bearings are arranged between the right end cover and the rotating shaft, and the left winding and the right winding are respectively positioned at the left side and the right side of the rare earth magnetic steel ring. The invention reduces the consumption of rare earth magnetic steel through the structures of the double stator disks and the single rotor disk, and the rare earth magnetic steel ring is integrally manufactured and is wholly magnetized, thereby greatly facilitating production and effectively improving production efficiency.
Description
Technical Field
The invention relates to the field of motor structures, in particular to a disc type motor structure.
Background
Disc motors have evolved faster in recent years. The motor usually has the characteristic of no iron core, the magnetic field is axial, and the magnetic steel adopts rare earth permanent magnet materials. The motor adopts a double-rotor single-stator structure, and a stator coil is positioned in the middle of the double rotors. The magnetic field air gap of the motor is large, and a large amount of rare earth permanent magnet materials are needed to improve the torque. In order to improve the utilization rate of rare earth permanent magnet materials, halbach (Halbach) arrays are mostly adopted to improve the use efficiency of the magnetic materials. However, the Halbach array is difficult to wholly magnetize after the assembly is completed, and the difficulty of assembling each small magnetic steel after magnetizing is high, so that the Halbach array is very inconvenient in actual processing and production. Therefore, how to improve the production efficiency of the disc motor is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a disc motor structure capable of effectively improving production efficiency so as to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme that the disc type motor structure comprises:
the rotor disc is a rare earth magnetic steel ring, and the rare earth magnetic steel ring is fixedly sleeved on the rotating shaft;
the left stator disc comprises a left magnetic yoke, a left winding and a left end cover, wherein the left magnetic yoke is positioned between the left winding and the left end cover;
The right stator disc comprises a right magnetic yoke, a right winding and a right end cover, wherein the right magnetic yoke is positioned between the right winding and the right end cover;
the left stator disc and the right stator disc are sleeved at two ends of the rotating shaft, a bearing is arranged between the left end cover and the rotating shaft, a bearing is arranged between the right end cover and the rotating shaft, and the left winding and the right winding are respectively positioned at the left side and the right side of the rare earth magnetic steel ring.
Preferably, the rotor disc is fixed on the rotating shaft through a magnetic steel inner sleeve.
Further, an inner spline is arranged on the inner circumference of the magnetic steel inner sleeve, and an outer spline matched with the inner spline is arranged on the outer circumference of the rotating shaft.
Further, the magnetic steel inner sleeve is bonded with the rare earth magnetic steel ring.
Further, a plurality of first notches are formed in the outer circumference of the magnetic steel inner sleeve, a plurality of second notches corresponding to the first notches are formed in the inner circumference of the rare earth magnetic steel ring, and the first notches and the second notches are positioned through bolts.
Preferably, the left magnetic yoke is adhered to the left end cover, and the right magnetic yoke is adhered to the right end cover.
Preferably, the left winding is attached to the left yoke and the right winding is attached to the right yoke.
Preferably, the left end cover or the right end cover is provided with a wire outlet hole.
Preferably, the left end cover and the right end cover are connected through a housing, the left winding and the right winding are both mounted on the housing, and the rotor disc is located in the housing.
As described above, the disk motor structure of the invention has the following beneficial effects:
1. The invention reduces the consumption of rare earth permanent magnet materials (rare earth magnetic steel rings) through the structures of the double stator disks and the single rotor disk.
2. The rare earth magnetic steel ring is integrally manufactured, a plurality of small magnetic steels are not required to be assembled, and the rare earth magnetic steel ring can be integrally magnetized, so that the production is greatly facilitated, and the production efficiency is effectively improved.
3. The left winding and the right winding can be directly connected with the end covers at two sides, so that the heat dissipation of the left winding and the right winding is greatly facilitated, and the current density of the motor is improved.
4. According to the invention, the rare earth magnetic steel ring on the rotor disk does not need to be supported by a turntable, so that the moment of inertia is further reduced, and the dynamic characteristic of the motor is improved.
5. The invention adopts the structure of the double stator disks and the single rotor disk, eliminates the influence of mutual attraction between the magnetic steel between the two rotor disks in the double rotor disks of the single stator disk, and further optimizes the production process of the disk motor.
Drawings
Fig. 1 is a structural view of a rotor disk in the present invention.
FIG. 2 is a cross-sectional view taken at H-H in FIG. 1.
Fig. 3 is a schematic view showing the rotor disk in a disassembled state in the present invention.
Fig. 4 is a schematic overall structure of the present invention.
FIG. 5 is a cross-sectional view taken at I-I in FIG. 4.
Fig. 6 is a schematic diagram of the present invention in a split mode.
Fig. 7 is a first structural view of the left and right yokes in the present invention.
Fig. 8 is a second structural view of the left and right yokes in the present invention.
Fig. 9 is a third construction diagram of the left and right yokes in the present invention.
Fig. 10 is a series star view of a left stator plate and a right stator plate in the present invention.
Fig. 11 is a series triangular view of a left stator plate and a right stator plate in the present invention.
Fig. 12 is a parallel star view of a left stator plate and a right stator plate in the present invention.
Fig. 13 is a parallel delta view of a left stator plate and a right stator plate in the present invention.
In the figure:
1. Rotor disc 100 positioning hole
10. Magnetic steel inner sleeve 13 bolt
11. Second recess 101 internal spline
102. First notch 4 rotation shaft
41. Left yoke of external spline 21
22. Left end cover of left winding 23
31. Right yoke 32 right winding
33. Right end cap 5 bearing
6. Wire outlet hole of shell 7
8. Bolt 200 silicon steel sheet
300. Soft magnetic material
Detailed Description
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present invention, and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the terms of modification, variation of proportions, or adjustment of sizes, without affecting the efficacy or achievement of the present invention, should be construed as falling within the scope of the present invention. Also, the terms such as "upper", "lower", "left", "right", "middle" and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.
An embodiment 1-6 show a disk motor structure, comprising:
The rotor disc 1 and the rotating shaft 4 are combined with fig. 1-3, the rotor disc 1 is a rare earth magnetic steel ring, and the rare earth magnetic steel ring is fixedly sleeved on the rotating shaft 4. The rare earth magnetic steel ring 11 is of an integrated disc-shaped structure, and the whole rare earth magnetic steel ring is magnetized once to form permanent magnetic steel during processing, so that the production and manufacturing processes are simple.
A left stator disc, in connection with fig. 4-6, comprising a left yoke 21, a left winding 22 and a left end cap 23, said left yoke 21 being located between the left winding 22 and the left end cap 23. A right stator disk including a right yoke 31, a right winding 32, and a right end cap 33, the right yoke 31 being located between the right winding 32 and the right end cap 33. Referring to fig. 5 and 6, the left stator disc and the right stator disc are sleeved at two ends of the rotating shaft 4, wherein a bearing 5 is arranged between the left end cover 23 and the rotating shaft 4, a bearing 5 is arranged between the right end cover 33 and the rotating shaft 4, and the left winding 22 and the right winding 32 are respectively positioned at the left side and the right side of the rare earth magnetic steel ring. When the rotating shaft 4 rotates, the rotating shaft 4 rotates with the rare earth magnetic steel ring, and the left and right stator plates are relatively fixed.
The principle of the invention is that a double-stator-disc single-rotor-disc structure is adopted, the rotor disc 1 is positioned between the left stator disc and the right stator disc, and the whole stator disc is free of iron cores, so that the magnetic field air gap is effectively reduced. The rare earth magnetic steel ring is made of rare earth permanent magnetic material, has a whole disc-shaped structure and has no array form, thereby being convenient for magnetizing and improving the production efficiency. The rare earth permanent magnetic material is a permanent magnetic material prepared by an alloy formed by rare earth metal and transition metal (such as cobalt, iron and the like) through a certain process. The magnetic field of the rare earth magnetic steel ring is axially magnetized, and the left winding 22 and the right winding 32 on the left stator disk and the right stator disk have the same structure and are overlapped in space (axial direction). The left yoke 21 is arranged on the outer side of the left winding 22, and the right yoke 31 is arranged on the outer side of the right winding 32, so that the utilization rate of rare earth permanent magnet materials can be effectively improved. That is, the present invention can realize the maximum utilization of the rare earth material and can also effectively improve the production efficiency. The rare earth magnetic steel ring does not need to be supported by a turntable, so that the rotational inertia of a motor rotor is further reduced, and the dynamic characteristic of the motor is improved. The dynamic characteristics are improved, namely the motor is accelerated and decelerated rapidly.
Embodiment two:
Referring to fig. 1-6, in particular, when the rotating shaft 4 is made of a non-magnetic material (for example, aluminum alloy), it can be in direct contact fit with the rare earth magnetic steel ring, but referring to fig. 2 and 3, when the rotating shaft 4 is made of a magnetic material (for example, alloy steel), it cannot be in direct contact fit with the rare earth magnetic steel ring, and at this time, the rotor disk 1 is fixed on the rotating shaft 4 through the magnetic steel inner sleeve 10. The magnetic steel inner sleeve can be made of non-magnetic materials, such as PPS high-strength engineering plastics, high-strength magnesium aluminum alloys and the like. As shown in fig. 3, in this embodiment, the inner circumference of the magnetic steel inner sleeve 10 is provided with an internal spline 101, and the outer circumference of the rotating shaft 4 is provided with an external spline 41 that mates with the internal spline 101. The magnetic steel inner sleeve 10 and the rare earth magnetic steel ring in the embodiment are bonded together through structural adhesive.
Further, as shown in fig. 2 and 3, the outer circumference of the magnetic steel inner sleeve 10 in the present embodiment is provided with a plurality of first notches 102, and the inner circumference of the rare earth magnetic steel ring is provided with a plurality of second notches 11 corresponding to the first notches 102, and the first notches 102 and the second notches 11 are positioned by bolts 13. Thereby facilitating the fixation of the inner circumference of the rare earth magnetic steel ring and the outer circumference of the magnetic steel inner sleeve 10. In order to ensure the perpendicularity of the magnetic steel inner sleeve 10 and the rotating shaft 4 after assembly, the lengths of the internal spline 101 and the external spline 41 are larger than the axial thickness of the magnetic steel inner sleeve 10.
The specific structure of the left stator plate 2 and the right stator plate 3 in this embodiment is that the left magnetic yoke 21 is embedded in and adhered to the inner wall of the left end cover 23 through structural adhesive to enhance the strength of the left end cover 23, and the right magnetic yoke 31 is embedded in and adhered to the inner wall of the right end cover 33 through structural adhesive to enhance the strength of the right end cover 33. For effective heat dissipation, the left winding 22 is abutted against the left yoke 21, the right winding 32 is abutted against the right yoke 31, and referring to fig. 5, since the area of the left yoke 21 is smaller than that of the left winding 22, the area of the right yoke 31 is smaller than that of the right winding 33, and a part of the left winding 22 and the right winding 32 are abutted directly against the left end cover 23 and the right end cover 33, respectively. And then let the heat of left winding 22 directly give off through left yoke 21 and left end cover 23, the heat of right winding 32 directly gives off through right yoke 31 and right end cover 33, improves radiating efficiency to can effectively improve the current density of this motor, just also can promote rated power. In addition, a heat conductive material such as heat conductive silicone grease may be coated on the left and right windings 22 and 32 to further enhance the heat dissipation effect of the left and right windings 22 and 32.
The left yoke 21 and the right yoke 31 in the present invention may be rolled and pressed from an electrical silicon steel sheet 200, and have a circular ring structure consisting of a plurality of concentric cylinders in the axial direction, referring to fig. 7. The left and right yokes 21 and 31 may also be made of a non-oriented soft magnetic material 300, such as an integral annular structure made of SMC, see fig. 8. The left yoke 21 and the right yoke 31 may also be circular ring-shaped yokes formed by splicing a plurality of soft magnetic materials 300 having a fan-shaped structure in the circumferential direction, referring to fig. 9.
In this embodiment, as shown in fig. 4 or 5, the right end cover 33 is provided with a wire outlet 7 for leading out the motor wire. The wire outlet hole 7 may be formed in the left end cover 23.
In this embodiment, referring to fig. 6, the left winding 22 and the right winding 32 are respectively provided with a positioning hole 100, and the left winding 22 and the right winding 32 are accurately matched and connected with the housing 6 through the positioning holes 100 and the bolts 8, so as to ensure that the left winding 22 and the right winding 32 are overlapped in space (axial direction) during assembly.
Referring to fig. 5 and 6, the left end cover 23 and the right end cover 33 are connected through the housing 6, the housing 6 is in a ring structure, the left winding 22 and the right winding 32 are both mounted on the housing 6 through bolts 8, and the left end cover 23 and the right end cover 33 are both connected with the housing 6 through bolts 8. After assembly, the rotor disc 1 is located in the housing 6, with the left stator disc 2 and the right stator disc 3 sandwiching the rotor disc 1.
The left winding 22 and the right winding 32 in the invention are three-phase windings respectively, six contacts are respectively arranged, the three-phase winding contacts of the left winding 22 are A11, B11 and C11 and A12, B12 and C12 respectively, and the three-phase winding contacts of the right winding 32 are A21, B21 and C21 and A22, B22 and C22 respectively. The contact connections of the two windings may be connected in series or in parallel.
In actual use, fig. 10 shows a series star connection, that is, contacts a12, B12, and C12 are connected with contacts a21, B21, and C21 respectively to form intermediate contacts, and contacts a11, B11, and C11 are sequentially connected together, and the outgoing lines of the whole motor are a22, B22, and C22.
Fig. 11 shows a series delta connection, i.e. contacts a12, B12, C12 are connected with contacts a21, B21, C21 respectively as intermediate contacts, contacts B11, C11, a11 are connected with contacts a22, B22, C22 respectively, and the outgoing lines of the whole motor are a22, B22, C22.
Fig. 12 shows a parallel star connection, contacts a11, B11, C11 are connected with contacts a21, B21, C21 respectively, contacts a11, B11, C11 are connected together in sequence, contacts a12, B12, C12 are connected with contacts a22, B22, C22 respectively, and the outgoing lines of the whole motor are a22, B22, C22.
Fig. 13 shows a parallel delta connection, contacts a11, B11, C11 are connected with contacts a21, B21, C21, contacts a12, B12, C12 are connected with contacts a22, B22, C22, contact a21 is connected with contact B22, contact B21 is connected with contact C22, contact C21 is connected with contact a22, and the outgoing lines of the whole motor are a22, B22, C22.
In summary, the disk motor structure provided by the invention can improve the production efficiency and save rare earth resources. Therefore, the invention effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. The present invention is capable of modifications in the foregoing embodiments, as obvious to those skilled in the art, without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671227.2A CN109391110B (en) | 2017-08-08 | 2017-08-08 | A disc motor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671227.2A CN109391110B (en) | 2017-08-08 | 2017-08-08 | A disc motor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109391110A CN109391110A (en) | 2019-02-26 |
| CN109391110B true CN109391110B (en) | 2024-12-24 |
Family
ID=65414020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710671227.2A Active CN109391110B (en) | 2017-08-08 | 2017-08-08 | A disc motor structure |
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| Country | Link |
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| CN (1) | CN109391110B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417225A (en) * | 2019-08-20 | 2019-11-05 | 黄向阳 | A kind of Double-rotor disc wheel hub permasyn morot |
| CN110417220A (en) * | 2019-08-20 | 2019-11-05 | 黄向阳 | A kind of bimorph transducer single rotor disc type permanent magnet motor |
| CN110829706B (en) * | 2019-10-28 | 2021-02-05 | 北京精密机电控制设备研究所 | Superspeed composite rotor connecting structure |
| CN113937921A (en) * | 2021-04-02 | 2022-01-14 | 上海鸣志电器股份有限公司 | A stepping motor rotor and a motor having the same |
| CN113346702B (en) * | 2021-06-23 | 2023-04-07 | 浙江盘毂动力科技有限公司 | Method for weakening target harmonic in axial flux motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202997874U (en) * | 2012-12-24 | 2013-06-12 | 合肥瑞箭新能源汽车零部件技术有限公司 | Double-stator disc type motor |
| CN207184291U (en) * | 2017-08-08 | 2018-04-03 | 擎声自动化科技（上海）有限公司 | A kind of disc type electric machine structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100568677C (en) * | 2005-09-20 | 2009-12-09 | 沈阳工业大学 | A dual-stator, single-rotor disc-type brushless double-fed AC motor |
| CN201928127U (en) * | 2010-12-03 | 2011-08-10 | 天津荣亨集团股份有限公司 | Flywheel energy-storage device for double-stator alternating-current motor |
-
2017
- 2017-08-08 CN CN201710671227.2A patent/CN109391110B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202997874U (en) * | 2012-12-24 | 2013-06-12 | 合肥瑞箭新能源汽车零部件技术有限公司 | Double-stator disc type motor |
| CN207184291U (en) * | 2017-08-08 | 2018-04-03 | 擎声自动化科技（上海）有限公司 | A kind of disc type electric machine structure |
Also Published As
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| CN109391110A (en) | 2019-02-26 |
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