CN107659103B - Asynchronous starting permanent magnet synchronous motor - Google Patents
Asynchronous starting permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN107659103B CN107659103B CN201711081139.3A CN201711081139A CN107659103B CN 107659103 B CN107659103 B CN 107659103B CN 201711081139 A CN201711081139 A CN 201711081139A CN 107659103 B CN107659103 B CN 107659103B
- Authority
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- China
- Prior art keywords
- rotor
- stator
- structural member
- squirrel cage
- magnetic
- 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
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 241000555745 Sciuridae Species 0.000 claims abstract description 22
- 238000004804 winding Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 230000004888 barrier function Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000005389 magnetism Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
Classifications
-
- 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
- H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to an asynchronous starting permanent magnet synchronous motor, which comprises a stator winding, wherein the stator winding is arranged in a slot of a stator core, and is characterized in that a first rotor is arranged in the stator core, a second rotor is arranged in the first rotor, and the stator winding comprises: a flat-bottomed squirrel cage groove is formed on the outer circle of the rotor I, and a guide bar of a squirrel cage of cast aluminum or cast copper is arranged in the squirrel cage groove; the rotor II consists of two sections of rotor II iron cores, the two sections of rotor II iron cores twist an interval angle between two slots of a stator, a magnetic steel slot is formed in the rotor II iron core, magnetic steel is arranged in the magnetic steel slot, a non-magnetic steel structural member is arranged at the outer circle of the central axis of the two poles of the rotor II iron core, and the distance from the bottom of a squirrel cage slot to the inner hole of the rotor I iron core of the rotor I and the steel structural member of the rotor II jointly play a magnetic isolation role. The invention solves the production efficiency problem of stator offline and suppresses the influence of stator tooth harmonic wave on motor operation. Meanwhile, the problem of pole leakage caused by the sectional torsion angle of the second rotor is solved by adding the steel structural member.
Description
Technical Field
The invention relates to an asynchronous starting permanent magnet synchronous motor, and belongs to the field of motors.
Background
The permanent magnet synchronous motor used in industry at present can not finish the starting process by the motor by only accessing the power grid when a frequency converter or a controller is not provided. The asynchronous starting permanent magnet synchronous motor utilizes a squirrel cage widely used for the asynchronous motor to complete the starting process, so that the problem is well solved. After the motor normally runs, the squirrel cage stops to play a role, and the motor is actually a common permanent magnet synchronous motor, and the permanent magnet synchronous motor usually affects the torque output by the motor due to stator tooth harmonic wave and rotor tooth harmonic wave in the running process, so that the problems of increased loss, overlarge vibration noise and the like of the motor are caused. Generally, in order to eliminate stator tooth harmonic wave, methods such as stator chute or rotor oblique pole can be adopted, and the stator oblique pole can greatly influence the automation and efficiency of stator offline, meanwhile, the stator resistance and loss are increased, and the rotor oblique pole has a certain difficulty in implementation because of the placement problem of a rotor squirrel cage and magnetic steel.
In view of the above problems, several patents have been filed in this field. In the aspect of rotor oblique pole, patent number ZL200520046139.6, the name is an asynchronous starting permanent magnet synchronous motor rotor structure, a rotor sectional oblique pole method is provided, but the size of the torsion angle is limited by a process needing to ensure the conduction of a squirrel cage guide bar. The magnetic steel is arranged in an arched manner, the bottom of the rotor squirrel cage is arranged in a shape similar to an arc along the bottom of the rotor squirrel cage, and the arrangement angle of each pole of magnetic steel is only two thirds of the angle occupied by each pole. In the aspect of rotor blocking, patent number ZL201110250809.6, the name is a self-starting permanent magnet synchronous motor rotor, a cage rotor and a synchronous rotor are separated, but only the cage rotor is skewed, rotor skewed poles are not performed, and the magnetic steel placement mode is a mode that the bottom of the cage rotor groove is arranged along the arc of the groove bottom. The above patent does not protect the arrangement modes of the V-shaped magnetic steel and the U-shaped magnetic steel, and meanwhile, because of self-restriction, stator tooth harmonic waves are not eliminated, and a good technical effect cannot be achieved.
Disclosure of Invention
The invention aims to solve the technical problems that: the production efficiency problem of stator offline and the influence of stator tooth harmonic wave on motor operation are restrained.
In order to solve the technical problem, the technical scheme of the invention provides an asynchronous starting permanent magnet synchronous motor, which comprises a stator winding, wherein the stator winding is arranged in a groove of a stator core, and the asynchronous starting permanent magnet synchronous motor is characterized in that a first rotor is arranged in the stator core, and a second rotor is arranged in the first rotor, wherein: a flat-bottomed squirrel cage groove is formed on the outer circle of the rotor I, and a guide bar of a squirrel cage of cast aluminum or cast copper is arranged in the squirrel cage groove; the rotor II consists of two sections of rotor II iron cores, the two sections of rotor II iron cores twist an interval angle between two slots of a stator, a magnetic steel slot is formed in the rotor II iron core, magnetic steel is arranged in the magnetic steel slot, a non-magnetic steel structural member is arranged at the outer circle of the central axis of the two poles of the rotor II iron core, and the distance from the bottom of a squirrel cage slot to the inner hole of the rotor I iron core of the rotor I and the steel structural member of the rotor II jointly play a magnetic isolation role.
Preferably, the steel structural member is a T-shaped steel structural member or a one-piece steel structural member.
Preferably, the lower end of the T-shaped steel structural member is provided with two triangular protrusions.
Preferably, the outer circular span of the steel structural member is the angle between two squirrel cage groove spaces of the first rotor plus the angle spanned by the groove bottoms of the squirrel cage grooves of the first rotor.
Preferably, a non-magnetic isolating sheet is arranged between the two sections of the rotor two cores.
The invention solves the production efficiency problem of stator offline and suppresses the influence of stator tooth harmonic wave on motor operation. Meanwhile, the problem of pole leakage caused by the sectional torsion angle of the second rotor is solved by adding the steel structural member.
Drawings
Fig. 1 is a schematic diagram of a general assembly structure of a motor, in which:
1-a stator core, 2-a stator winding, 3-a first rotor, 4-a second rotor and 11-a magnetism isolating sheet;
FIG. 2 (a) is a schematic structural view of a rotor I;
fig. 2 (b) is a cross-sectional view of a rotor core, in which:
5-a rotor-iron core and 6-a mouse cage;
fig. 3 (a) and fig. 3 (b) are schematic structural diagrams of two magnetic steels of a rotor in a V shape;
FIG. 3 (c) is an enlarged view of part B of FIG. 3 (a);
fig. 3 (d) is a partial enlarged view of the portion C in fig. 3 (b), in which:
7-a rotor two-core, 8-magnetic steel, 9-a magnetism isolating groove and 10-a non-magnetic T-shaped or one-shaped steel structural member;
fig. 4 (a) and fig. 4 (b) are schematic structural diagrams of two magnetic steels of the rotor in a "U" shape.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
The invention is further described below with reference to specific examples, taking a 6-pole, rotor "V" shaped magnet steel arrangement, a motor with a stator slot number/rotor slot number of 54/48 as an example.
For the smoothness of motor torque operation, the vibration generated by the motor is suppressed. When the stator iron core is in a straight slot structure, the stator winding adopts a concentric winding, and simultaneously the rotor is divided into a first rotor part and a second rotor part, and the second rotor is in a diagonal pole mode. The invention mainly carries out oblique poles with V-shaped and U-shaped rotor magnetic steel arrangement structures.
As shown in fig. 1, which is a schematic diagram of the general assembly structure of the motor, the stator winding 2 is placed in a slot of the circular stator core 1, the inside of the stator core 1 is a first rotor 3, and the inside of the first rotor 3 is a second rotor 4. A flat-bottomed cage groove is formed in the outer circle of the rotor I3, and a guide bar of a cage 6 of cast aluminum or cast copper is arranged in the cage groove. The second rotor 4 is composed of two sections of second rotor iron cores 7, the two sections of second rotor iron cores 7 twist an angle between two slots of a stator, a magnetic steel slot is formed in the second rotor iron core 7, magnetic steel 8 is arranged in the magnetic steel slot, and a magnetism isolating slot 9 is formed in the bottom of the V shape to isolate magnetism, so that magnetism leakage is reduced. A non-magnetic T-shaped or one-shaped steel structural member 10 is arranged at the excircle of the central axis of the two poles of the rotor core 7. The non-magnetic steel structural member 10 forms a magnetic isolation structure together with the groove bottom part of the first rotor 3 after the second rotor iron core 7 is twisted, so that the interelectrode magnetic flux leakage of the second rotor iron core 7 is reduced. The outer circular span of the steel structural member 10 is the rotor-3 cage groove spacing angle plus the angle spanned by the rotor-3 cage groove bottoms. The distance from the bottom of the cage groove to the inner hole of the rotor I iron core 5 and the non-magnetic T-shaped or one-shaped steel structural member 10 of the rotor II 4 jointly play a role in magnetism isolation. A non-magnetic isolating sheet 11 is arranged between the two sections of rotor two iron cores 7, so that the mutual magnetic leakage between the two sections of rotor two iron cores 7 is reduced.
Claims (4)
1. An asynchronous starting permanent magnet synchronous motor, comprising a stator winding (2), wherein the stator winding (2) is arranged in a groove of a stator core (1), and is characterized in that a first rotor (3) is arranged in the stator core (1), and a second rotor (4) is arranged in the first rotor (3), wherein: the outer circle of the rotor I (3) is provided with a flat-bottomed squirrel cage groove, and the squirrel cage groove is internally provided with a guide bar of a squirrel cage (6) of cast aluminum or cast copper; the rotor II (4) is composed of two sections of rotor II iron cores (7), the two sections of rotor II iron cores (7) twist a distance angle between two slots of a stator, a magnetic steel slot is formed in the rotor II iron cores (7), magnetic steel (8) is arranged in the magnetic steel slot, a non-magnetic steel structural member (10) is arranged at the outer circle of the central axis of two poles of the rotor II iron cores (7), the distance from the bottom of the squirrel cage slot to the inner hole of a rotor I iron core (5) of the rotor I (3) and the steel structural member (10) of the rotor II (4) jointly play a magnetic isolation role, wherein the non-magnetic steel structural member (10) and the slot bottom part of the rotor I (3) jointly form a magnetic isolation structure after the rotor II iron cores (7) twist, so that interelectrode magnetic leakage of the rotor II iron cores (7) is reduced, and the outer circle span of the steel structural member (10) is the distance angle between two squirrel cage slots of the rotor I (3) plus the angle spanned by the squirrel cage slot bottom of the rotor I (3).
2. An asynchronous starting permanent magnet synchronous motor according to claim 1, characterized in that the steel structural member (10) is a T-shaped steel structural member or a steel structural member.
3. An asynchronous start permanent magnet synchronous motor according to claim 2 wherein the lower end of the T-section steel structure has two triangular projections.
4. An asynchronous starting permanent magnet synchronous motor according to claim 1, characterized in that a non-magnetically conductive magnetic barrier sheet (11) is provided between the two rotor cores (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711081139.3A CN107659103B (en) | 2017-11-06 | 2017-11-06 | Asynchronous starting permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711081139.3A CN107659103B (en) | 2017-11-06 | 2017-11-06 | Asynchronous starting permanent magnet synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107659103A CN107659103A (en) | 2018-02-02 |
| CN107659103B true CN107659103B (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711081139.3A Active CN107659103B (en) | 2017-11-06 | 2017-11-06 | Asynchronous starting permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN107659103B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110474470B (en) * | 2019-07-10 | 2021-08-03 | 中车永济电机有限公司 | Low-loss low-noise totally-enclosed self-ventilation traction motor for 100% low-floor vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2862483Y (en) * | 2005-10-31 | 2007-01-24 | 上海日立电器有限公司 | Rotor structure for asynchrony-started permanent magnetic synchrony motor |
| CN102142758A (en) * | 2011-03-07 | 2011-08-03 | 浙江大学 | Cage rotor of self-starting permanent magnet synchronous motor |
| CN102142755A (en) * | 2011-03-07 | 2011-08-03 | 浙江大学 | V-shaped slot rotor of self-starting permanent magnet synchronous motor |
| CN203896152U (en) * | 2014-04-25 | 2014-10-22 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN104184294A (en) * | 2014-08-03 | 2014-12-03 | 赵晓东 | Enhanced type pole-changing speed-changing permanent-magnet synchronous motor |
| CN106130279A (en) * | 2016-06-29 | 2016-11-16 | 清华大学 | A kind of asynchronous machine with permanent magnet excitation |
-
2017
- 2017-11-06 CN CN201711081139.3A patent/CN107659103B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2862483Y (en) * | 2005-10-31 | 2007-01-24 | 上海日立电器有限公司 | Rotor structure for asynchrony-started permanent magnetic synchrony motor |
| CN102142758A (en) * | 2011-03-07 | 2011-08-03 | 浙江大学 | Cage rotor of self-starting permanent magnet synchronous motor |
| CN102142755A (en) * | 2011-03-07 | 2011-08-03 | 浙江大学 | V-shaped slot rotor of self-starting permanent magnet synchronous motor |
| CN203896152U (en) * | 2014-04-25 | 2014-10-22 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN104184294A (en) * | 2014-08-03 | 2014-12-03 | 赵晓东 | Enhanced type pole-changing speed-changing permanent-magnet synchronous motor |
| CN106130279A (en) * | 2016-06-29 | 2016-11-16 | 清华大学 | A kind of asynchronous machine with permanent magnet excitation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107659103A (en) | 2018-02-02 |
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