CN115333268A - Permanent magnet synchronous motor - Google Patents
Permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN115333268A CN115333268A CN202211247155.6A CN202211247155A CN115333268A CN 115333268 A CN115333268 A CN 115333268A CN 202211247155 A CN202211247155 A CN 202211247155A CN 115333268 A CN115333268 A CN 115333268A
- Authority
- CN
- China
- Prior art keywords
- punching sheet
- magnetic steel
- permanent magnet
- magnet synchronous
- machine according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 238000004080 punching Methods 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 239000003292 glue Substances 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 10
- 230000005855 radiation Effects 0.000 abstract description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
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
-
- 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
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- 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
Landscapes
- 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 the technical field of motors, in particular to a permanent magnet synchronous motor which comprises a machine shell, a stator assembly fixedly arranged in the machine shell, a rotor assembly rotatably arranged in the machine shell and a stator assembly fixedly arranged on the motor shaft, wherein the rotor assembly comprises a motor shaft and a punching sheet group fixedly arranged on the motor shaft, the punching sheet group is formed by stacking a plurality of punching sheets, and each punching sheet is obliquely provided with a plurality of magnetic steel grooves matched with magnetic steel. After the magnetic steel is obliquely arranged at 38 degrees, the air gap flux density is about 5 percent higher than the radial radiation, the magnetic flux area can be larger, the air gap flux density is improved, and the motor has higher torque density and power density.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a permanent magnet synchronous motor.
Background
With the further application of the built-in magnetic steel permanent magnet motor in the fields of industrial control and the like, more rigorous requirements are put forward on performance indexes of cogging torque, ripple torque, torque density, vibration noise, dynamic response and the like of the permanent magnet motor, and the permanent magnet motor has the problems of demagnetization and the like due to the principle characteristics of the permanent magnet motor.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the technical problems in the above technology, the present invention provides a permanent magnet synchronous motor, comprising,
a housing, a stator assembly fixedly disposed within the housing, and a rotor assembly rotatably disposed within the housing, and,
the rotor assembly comprises a motor shaft and a punching sheet group fixedly arranged on the motor shaft, wherein,
the punching sheet group is formed by stacking a plurality of punching sheets, and a plurality of magnetic steel grooves matched with the magnetic steel are obliquely arranged on each punching sheet.
Furthermore, the inclination angle of the magnetic steel grooves is 38 degrees, and each magnetic steel groove is uniformly distributed on the punching sheet.
Furthermore, glue holes are formed in the side walls of the magnetic steel grooves.
Furthermore, a first cavity and a second cavity are arranged at the position, close to the center of the punching sheet, of the magnetic steel slot, wherein,
the first cavity extends towards the center of the punching sheet,
the second cavity faces the adjacent punching sheet.
Furthermore, a plurality of through holes are formed in the punching sheet.
Further, a magnetic isolation bridge is arranged between every two adjacent magnetic steel grooves.
Furthermore, a notch is formed in the position, far away from the center of the punching sheet, of the magnetic steel groove.
Furthermore, a bulge is further arranged at the position, close to the center of the punching sheet, of the magnetic steel groove.
Further, the stator assembly comprises a framework arranged on the outer wall of the casing, wherein,
the diameter of the framework is matched with that of the punching sheet group;
and a plurality of groups of coils are wound on the framework.
Has the advantages that: 1. after the magnetic steel is obliquely arranged at 38 degrees, the air gap flux density is about 5 percent higher than the radial radiation, the magnetic flux area can be larger, the air gap flux density is improved, and the motor has higher torque density and power density.
2. Through setting up some jiao kou, can be fixed the magnet steel, avoid direct coating glue, produce and spill over the phenomenon.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a stator assembly of the present invention;
FIG. 3 is a schematic view of the construction of a rotor assembly of the present invention;
FIG. 4 is a schematic view of the structure of the punch of the present invention;
in the figure:
100. a housing;
200. a stator assembly, 210, a backbone;
300. the rotor assembly 310, the motor shaft 320, the punching sheet group 321, the punching sheet 322, the magnetic steel groove 323, the glue dispensing opening 324, the first cavity 325, the second cavity 326, the through hole 327, the magnetic isolation bridge 328, the notch 329 and the protrusion.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "top", "bottom", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are used for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like 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 other sequences than those illustrated or described herein.
Example one
As shown in fig. 1 to 4, a permanent magnet synchronous motor includes a casing 100, a stator assembly 200 fixedly disposed inside the casing 100, and a rotor assembly 300 rotatably disposed inside the casing 100, and the rotor assembly 300 includes a motor shaft 310 and a punching sheet set 320 fixedly disposed on the motor shaft 310, where the punching sheet set 320 is formed by stacking a plurality of punching sheets 321, and each punching sheet 321 is obliquely provided with a plurality of magnetic steel slots 322 adapted to magnetic steel.
The inclination angle of the magnetic steel slots 322 is 38 degrees, and each magnetic steel slot 322 is uniformly distributed on the punching sheet 321. After the magnetic steel is inclined by 38 degrees, the air gap flux density is about 5 percent higher than the radial radiation, the magnetic flux area can be larger, and the air gap flux density is improved, so that the motor has higher torque density and power density. Since the magnetic circuit of the permanent magnet motor has a demagnetization problem, the inclination angle is not unique, and the embodiment is described by 38 °.
And a glue point 323 is arranged on each side wall of the magnetic steel groove 322. When the motor is in a working condition of a high-vibration occasion, the rotor is integrally plastic-packaged; when the motor is in a fixed working environment, glue can be injected through the inserting glue dispensing port 323 to fix the permanent magnet, so that the phenomenon that the glue is directly smeared to overflow is avoided.
The magnetic steel slot 322 is provided with a first cavity 324 and a second cavity 325 near the center of the punch 321, wherein the first cavity 324 extends towards the center of the punch 321, and the second cavity 325 is arranged towards the adjacent punch 321. The first cavity 324 and the second cavity 325 ensure that the magnetic steel is inserted into the magnetic steel groove 322, and a positioning effect is achieved. Meanwhile, the first cavity 324 enables the magnetic steel to have a larger inclination angle, and the second cavity 325 has a magnetic flux leakage effect.
And a magnetic isolation bridge 327 is arranged between every two adjacent magnetic steel grooves 322. That is, the magnetic isolation bridge 327 exists between the first cavity 324 and the second cavity 325, and the magnetic isolation bridge 327 reduces the magnetic leakage of the motor.
The punching sheet 321 is further provided with a plurality of through holes 326. The magnetic steel slot 322 is provided with a notch 328 at a position far away from the center of the punch 321. The magnetic steel slot 322 is also provided with a protrusion 329 near the center of the punching sheet 321. The arrangement of the protrusions 329 determines the radial direction of the motor.
The stator assembly 200 comprises a framework 210 arranged on the outer wall of the casing 100, wherein the diameter of the framework 210 is adapted to the diameter of the punching sheet group 320; the bobbin 210 is wound with a plurality of sets of coils.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (8)
1. A permanent magnet synchronous motor is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a housing, a stator assembly fixedly disposed within the housing, and a rotor assembly rotatably disposed within the housing, and,
the rotor assembly comprises a motor shaft and a punching sheet group fixedly arranged on the motor shaft, wherein,
the punching sheet group is formed by stacking a plurality of punching sheets, and each punching sheet is obliquely provided with a plurality of magnetic steel grooves matched with the magnetic steel;
a first cavity and a second cavity are arranged at the position, close to the center of the punching sheet, of the magnetic steel slot, wherein,
the first cavity extends towards the center of the punching sheet,
the second cavity faces the adjacent punching sheet.
2. A permanent magnet synchronous machine according to claim 1, characterized in that:
the inclination angle of the magnetic steel grooves is 38 degrees, and each magnetic steel groove is uniformly distributed on the punching sheet.
3. A permanent magnet synchronous machine according to claim 2, characterized in that:
and glue applying openings are formed in the side walls of the magnetic steel grooves.
4. A permanent magnet synchronous machine according to claim 3, characterized in that:
the punching sheet is also provided with a plurality of through holes.
5. A permanent magnet synchronous machine according to claim 4, characterized in that:
and a magnetic isolation bridge is arranged between every two adjacent magnetic steel grooves.
6. A permanent magnet synchronous machine according to claim 5, characterized in that:
and a notch is formed in the magnetic steel groove far away from the center of the punching sheet.
7. A permanent magnet synchronous machine according to claim 6, characterized in that:
the magnetic steel groove is close to the center of the punching sheet and is also provided with a bulge.
8. A permanent magnet synchronous machine according to claim 1, characterized in that:
the stator assembly comprises a framework arranged on the outer wall of the casing, wherein,
the diameter of the framework is matched with that of the punching sheet group;
and a plurality of groups of coils are wound on the framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211247155.6A CN115333268A (en) | 2022-10-12 | 2022-10-12 | Permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211247155.6A CN115333268A (en) | 2022-10-12 | 2022-10-12 | Permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115333268A true CN115333268A (en) | 2022-11-11 |
Family
ID=83915037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211247155.6A Pending CN115333268A (en) | 2022-10-12 | 2022-10-12 | Permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115333268A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104169A (en) * | 2013-04-15 | 2014-10-15 | 株式会社安川电机 | Rotating electrical machine and manufacturing method of rotor |
| CN105071569A (en) * | 2015-08-19 | 2015-11-18 | 广东威灵电机制造有限公司 | Rotor and motor |
| CN108768025A (en) * | 2018-08-15 | 2018-11-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and magneto |
-
2022
- 2022-10-12 CN CN202211247155.6A patent/CN115333268A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104169A (en) * | 2013-04-15 | 2014-10-15 | 株式会社安川电机 | Rotating electrical machine and manufacturing method of rotor |
| CN105071569A (en) * | 2015-08-19 | 2015-11-18 | 广东威灵电机制造有限公司 | Rotor and motor |
| CN108768025A (en) * | 2018-08-15 | 2018-11-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and magneto |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221111 |