CN211239476U - Rotor of motor and motor - Google Patents
Rotor of motor and motor Download PDFInfo
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- CN211239476U CN211239476U CN201921807746.8U CN201921807746U CN211239476U CN 211239476 U CN211239476 U CN 211239476U CN 201921807746 U CN201921807746 U CN 201921807746U CN 211239476 U CN211239476 U CN 211239476U
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Abstract
The utility model discloses a rotor and motor of motor, the rotor include pivot, rotor core and insert extremely multi-disc magnet steel in the rotor core, the multi-disc the magnet steel is followed rotor core's axle center circumference is arranged, rotor core includes first towards piece and second towards piece, first towards piece and second towards piece all include the edge rotor core circumference direction is equipped with a plurality of magnetic steel grooves, the magnetic steel groove is being close to the one end of pivot sets up first magnetic flux barrier section, adjacent two form second magnetic flux barrier section between the first magnetic flux barrier section, through the reasonable combination of two kinds of rotor towards pieces for rotor core's mechanical structure intensity is big to can effectively reduce the magnetic leakage flux of rotor, and then provide a reliable operation, efficient motor.
Description
Technical Field
The utility model relates to a permanent magnetism brushless DC motor field, in particular to rotor and motor of motor.
Background
In practical application, under the limited motor volume, the output power of the motor needs to be increased, and the radial magnetizing structure motor cannot provide enough magnetic flux due to the limitation of the motor volume. The rotor with the spoke type magnetic steel structure can realize that two pieces of magnetic steel are connected in parallel to provide magnetic flux, so that the air gap magnetic flux is obviously improved, and the output power of the motor is increased. However, the existing spoke type magnetic steel structure rotor has the phenomenon of serious magnetic flux leakage in work, so that the problem of low magnetic steel utilization rate is caused, and resource waste and production cost increase are caused.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a rotor and a motor of a motor, the rotor of the motor is a permanent magnet brushless dc motor rotor adopting a spoke type magnetic steel structure, which can effectively reduce the magnetic leakage of the motor and effectively enhance the mechanical strength of the rotor.
In order to solve the technical problem, the utility model discloses a concrete technical scheme as follows:
in one aspect, the utility model provides a rotor of motor, the rotor include pivot, rotor core and insert extremely multi-disc magnet steel in the rotor core, multi-disc magnet steel is spoke formula and follows rotor core circumference is arranged, rotor core includes first towards piece and second towards piece, first towards piece and second towards piece all include the edge a plurality of magnetic steel grooves that rotor core circumference direction was equipped with, the magnetic steel groove is followed the rotor core periphery is along radial direction orientation the inside extension of rotor core forms rectangle portion and first magnetic flow barrier portion in proper order, adjacent two the magnetic steel groove form second magnetic flow barrier portion between the first magnetic flow barrier portion.
Furthermore, the magnetic steel grooves are uniformly formed in the first punching sheet and the second punching sheet.
Furthermore, the magnetic steel groove on the first punching sheet further comprises a protruding portion, and the protruding portion is arranged at one end, far away from the center of the rotor core, of the rectangular portion.
Further, the protrusion is open.
Further, the magnetic steel slot on the second punching sheet further comprises a magnetic flux saturation portion, and the magnetic flux saturation portion is arranged at one end, far away from the center of the rotor core, of the rectangular portion.
Optionally, the first flux barrier is pointed; the second flux barrier is triangular in shape.
Further, the circumferential width of the first magnetic flux blocking portion gradually becomes smaller from the rectangular portion toward the inner periphery of the rotor core.
Further, a non-magnetic material is filled between the first magnetic flux barrier and the second magnetic flux barrier.
Furthermore, the excircle of the first punching sheet and the excircle of the second punching sheet both comprise a plurality of sections of arc sections which are not concentric.
Furthermore, the first punching sheet and the second punching sheet are both silicon steel sheets, and the magnetic steel is made of neodymium iron boron.
On the other hand, the utility model also provides a motor, the motor includes the stator and the above-mentioned rotor that provides a motor.
Adopt above-mentioned technical scheme, a rotor and motor of motor have following beneficial effect:
the rotor core is composed of two rotor punching sheets, the magnetic leakage flux of the rotor can be effectively reduced, and the performance of the motor is improved. In addition, the rotor punching sheet is provided with a plurality of protruding parts or magnetic flux saturation parts, so that the magnetic steel cannot be thrown out under the condition of high-speed operation of the rotor, the outer circle of the rotor punching sheet consists of a plurality of sections of arc sections which are not concentric, an uneven air gap is formed, the cogging torque of the motor is obviously reduced, and the operation stability of the motor is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic perspective view of a rotor with a spoke-type magnetic steel structure according to the present invention;
FIG. 2 is a schematic diagram of the structure of the rotor permanent magnet brushless DC motor with the spoke type magnetic steel structure of the present invention;
fig. 3 is a schematic structural diagram of the first punching sheet in the present invention;
fig. 4 is a schematic structural diagram of the second punching sheet in the present invention.
In the figure: 1-rotating shaft, 2-rotor core, 3-magnetic steel, 21-magnetic steel groove, 21 a-protrusion, 21 b-rectangular part, 21 c-first magnetic flux barrier part, 21 d-second magnetic flux barrier part, 21 e-magnetic flux saturation part and 4-magnetic core part.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Example 1
An embodiment of the present disclosure provides a rotor including a rotating shaft 1, a rotor core 2, and a magnetic steel 3, where the rotor core 2 is sleeved on the rotating shaft 1 and rotates synchronously with the rotating shaft 1, the magnetic steel 3 is disposed in the rotor core 2, and as shown in fig. 1 to 4, the rotor core 2 is formed by punching a plurality of electromagnetic steel plates into a predetermined shape and stacking the electromagnetic steel plates. The electromagnetic steel plate is preferably a silicon steel plate, has high magnetic induction and low iron loss, and is beneficial to reducing the loss of the motor. A plurality of magnetic steel grooves which are arranged in a spoke type structure are formed in the rotor core 2 along the circumferential direction of the rotor core 2, a plurality of magnetic steel grooves are inserted into the plurality of magnetic steel grooves, and the magnetic steel 3 can be rectangular and convenient to process. The magnetic steel 3 is preferably made of neodymium iron boron materials, so that the air gap flux of the motor can be improved, and the output power of the motor can be improved. The polarities of the two surfaces of the single magnetic steel 3 are opposite, and the polarities of the surfaces, facing each other, of the two adjacent magnetic steels 3 are the same, so that the multiple magnetic steels 3 are connected in parallel to provide magnetic flux, the air gap magnetic flux is obviously improved, and the output power of the motor is increased. The rotating shaft 1 is provided at the center portion of the rotor core 2 so that the rotor can freely rotate and output an electromagnetic torque.
The rotor core 2 comprises a first punching sheet and a second punching sheet, and the first punching sheet is axially laminated on the second punching sheet. The first punching sheet and the second punching sheet are both multiple, the first punching sheet comprises multiple magnetic steel slots 21 which are radially arranged, each magnetic steel slot 21 comprises a first magnetic flux blocking part 21c, each first magnetic flux blocking part 21c is arranged at a position close to the corresponding magnetic steel slot 21 and close to the corresponding rotating shaft 1, a second magnetic flux blocking part 21d is arranged between the corresponding first magnetic flux blocking parts 21c of the adjacent magnetic steel slots 21, each magnetic steel slot 21 further comprises a protruding part 21a and a rectangular part 21b, specifically, each protruding part 21a and the corresponding rectangular part 21b are formed by extending the corresponding magnetic steel slot 21 from the periphery of the corresponding rotor core 2 in the radial direction towards the inside of the corresponding rotor core 2, each protruding part 21a is arranged at one end of the corresponding rectangular part 21b, each first magnetic flux blocking part 21c is arranged at the other end of the corresponding rectangular part 21b, namely, each rectangular part 21b is provided with a first magnetic flux blocking part 21c close to one end of the corresponding rotating shaft 1, the rectangular portion 21b is used for accommodating the magnetic steel 3, and the circumferential width of the protruding portion 21a is designed to be smaller than that of the rectangular portion 21b, so that when the rotor rotates at a high speed, the plurality of pieces of magnetic steel 3 can be blocked by the protruding portion 21a and cannot be thrown out. The protrusions 21a are designed such that the adjacent core portions 4 are separated from each other at the outer circumferential surface of the rotor core 2, which is effective to reduce the leakage magnetic flux of the adjacent core portions 4 formed by the protrusions 21 a.
The second punching sheet comprises a plurality of magnetic steel grooves 21 which are radially arranged, each magnetic steel groove 21 comprises a first magnetic flux blocking part 21c, each first magnetic flux blocking part 21c is arranged at a position close to the magnetic steel groove 21 and close to the rotating shaft 1, and a second magnetic flux blocking part 21d is arranged between every two adjacent first magnetic flux blocking parts 21 c; the magnetic steel slot 21 further includes a magnetic flux saturation portion 21e and a rectangular portion 21b, specifically, the magnetic flux saturation portion 21e and the rectangular portion 21b are formed by extending the magnetic steel slot 21 from the outer periphery of the rotor core 2 along the radial direction toward the inside of the rotor core 2, the magnetic flux saturation portion 21e is disposed at one end of the rectangular portion 21b, and the first magnetic flux blocking portion 21c is disposed at the other end of the rectangular portion 21b, that is, the rectangular portion 21b is disposed at one end close to the rotating shaft 1 and provided with a first magnetic flux blocking portion 21 c.
The first magnetic flux barrier portion 21c is formed so as to gradually narrow in circumferential width from the rectangular portion 21b toward the inner periphery of the rotor core 2. The first magnetic flux blocking portion 21c has a positioning function of fixing the magnetic steel 3 in the radial direction of the rotor core 2.
Two magnetic circuits are formed between the first magnetic flux barrier 21c and two second magnetic flux barriers 21d adjacent to the first magnetic flux barrier 21c in the first punching sheet, and the two magnetic circuits are branched in different directions. The two magnetic circuits are in an inverted eight shape, the magnetic flux is saturated in the two magnetic circuits, and the function of reducing the leakage magnetic flux of the rotor is achieved.
As shown in fig. 4, unlike the first punching sheet in which an opening-shaped protrusion portion 21c is provided along the outer peripheral portion of the rotor core 2, the second punching sheet is provided with a magnetic flux saturation portion 21e along the outer peripheral portion of the rotor core 2, and the magnetic flux saturation portion 21e is designed to have a width such that the magnetic path of the portion tends to be saturated, thereby effectively reducing the magnetic flux leakage of the motor. The magnetic flux saturation portion 21e is designed such that the adjacent core portions 4 are connected to each other at the outer circumferential surface of the rotor core 2, and the mechanical structural strength of the rotor core 2 can be effectively enhanced.
The excircle of the first punching sheet and the excircle of the second punching sheet are composed of a plurality of sections of arc sections which are not concentric. Therefore, an uneven air gap is formed between the rotor core 2 and the stator, the cogging torque of the motor is obviously reduced, and the running stability of the motor is improved.
An embodiment in this specification also provides an electric machine comprising a stator and a rotor as provided above, the rotor being freely rotatable within the stator.
An embodiment of the present disclosure also provides a motor vehicle, an electric Scooter (E-Scooter), an electric Scooter, an electric bicycle, or an electric motorcycle, which is configured with the motor provided above.
Compared with the prior art, the utility model discloses following beneficial effect has: rotor core comprises two kinds of rotor punching, and the magnetic leakage flux of the reducible motor of first rotor punching, the second punching can increase partial magnetic leakage flux though, but can effectively strengthen rotor core's mechanical structure intensity, and the combination of two kinds of rotor punching can effectively reduce rotor magnetic leakage flux, can guarantee the mechanical structure intensity of motor when improving the motor performance.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention, as will be apparent to those skilled in the art, the invention is not limited to the details of the foregoing exemplary embodiment, but rather is embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a rotor of motor, its characterized in that, includes pivot (1), rotor core (2) and multi-disc magnet steel (3), and the multi-disc magnet steel (3) are followed the axle center circumference of rotor core (2) is arranged, rotor core (2) include first punching and second punching, first punching and second punching all include the edge a plurality of magnetic steel grooves (21) that rotor core (2) circumferential direction was equipped with, magnetic steel groove (21) are being close to the one end of pivot (1) sets up first magnetic flux barrier portion (21c), adjacent two form second magnetic flux barrier portion (21d) between first magnetic flux barrier portion (21 c).
2. The rotor of the motor according to claim 1, wherein the magnetic steel slots (21) on the first punching sheet extend from the outer periphery of the rotor core (2) in the radial direction towards the inside of the rotor core (2) to form a protrusion (21a) and a rectangular portion (21b) in sequence, and a first magnetic flux barrier portion (21c) is arranged at one end, close to the rotating shaft (1), of the rectangular portion (21 b).
3. A rotor of an electric machine according to claim 2, characterized in that the protrusions (21a) are open.
4. The rotor of the motor according to claim 1, wherein the magnetic steel slots (21) on the second punching sheet extend from the outer periphery of the rotor core (2) in the radial direction towards the inside of the rotor core (2) to form a magnetic flux saturation part (21e) and a rectangular part (21b) in sequence, and a first magnetic flux blocking part (21c) is arranged at one end, close to the rotating shaft (1), of the rectangular part (21 b).
5. A rotor of an electric machine according to claim 1, characterized in that the first flux barrier (21c) is pointed; the second magnetic flux barrier section (21d) has a triangular shape.
6. The rotor of an electric machine according to claim 2 or 4, characterized in that the circumferential width of the first flux barrier (21c) is gradually smaller from the rectangular portion (21b) toward the inner periphery of the rotor core (2).
7. The rotor of an electric machine according to claim 1, characterized in that a non-magnetic conductive material is filled between the one flux barrier (21c) and the second flux barrier (21 d).
8. The rotor of an electric machine of claim 5, wherein the outer circle of the first stamped sheet and the outer circle of the second stamped sheet both comprise a plurality of segments of circular arcs that are not concentric.
9. The rotor of an electric machine according to claim 1, characterized in that the first punching sheet and the second punching sheet are both silicon steel sheets, and the material of the magnetic steel (3) is neodymium iron boron.
10. An electrical machine comprising a stator and a rotor of an electrical machine according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921807746.8U CN211239476U (en) | 2019-10-25 | 2019-10-25 | Rotor of motor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921807746.8U CN211239476U (en) | 2019-10-25 | 2019-10-25 | Rotor of motor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211239476U true CN211239476U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921807746.8U Active CN211239476U (en) | 2019-10-25 | 2019-10-25 | Rotor of motor and motor |
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| Country | Link |
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| CN (1) | CN211239476U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659746A (en) * | 2021-10-18 | 2021-11-16 | 天津众科科技发展有限公司 | Rotor punching sheet group, rotor iron core, rotor and motor |
| CN114157067A (en) * | 2021-11-30 | 2022-03-08 | 台州阳春机电有限公司 | Motor rotor punching sheet |
-
2019
- 2019-10-25 CN CN201921807746.8U patent/CN211239476U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659746A (en) * | 2021-10-18 | 2021-11-16 | 天津众科科技发展有限公司 | Rotor punching sheet group, rotor iron core, rotor and motor |
| CN114157067A (en) * | 2021-11-30 | 2022-03-08 | 台州阳春机电有限公司 | Motor rotor punching sheet |
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