CN111082563A - Rotor structure of permanent magnet synchronous motor - Google Patents
Rotor structure of permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN111082563A CN111082563A CN202010009786.9A CN202010009786A CN111082563A CN 111082563 A CN111082563 A CN 111082563A CN 202010009786 A CN202010009786 A CN 202010009786A CN 111082563 A CN111082563 A CN 111082563A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- boss
- rotor body
- magnetic pole
- rotor
- 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 15
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
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
-
- 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
-
- 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)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a permanent magnet synchronous motor rotor structure, which comprises a rotor body and permanent magnets, wherein the permanent magnets are circumferentially distributed on the rotor body, the outer edge of the rotor body opposite to the permanent magnets is a magnetic pole arc, the magnetic pole arc is an arc concentric with the rotor body, the adjacent magnetic pole arcs are inwards sunken, a boss is arranged at the sunken part, the bottom end of the boss is connected with the magnetic pole arc in an inclined plane, the magnetic resistance of l-axis magnetic flux and the magnetic resistance of q-axis magnetic flux can be reduced, an embedded permanent magnet motor not only can realize that the air gap magnetic potential waveform is very close to a sine wave like a surface-mounted permanent magnet motor, but also can have a larger salient pole ratio, and therefore the weak magnetic capacity of the embedded unequal air gap permanent magnet motor is greatly improved.
Description
Technical Field
The invention relates to the field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor rotor structure.
Background
The traditional embedded permanent magnet synchronous motor has uniform air gaps, namely the profile of the outer diameter of a rotor is a whole circle and is concentric with the inner circle of a stator. The existing rotor of an embedded permanent magnet motor adopts a structure that a pit is arranged between magnetic poles to isolate magnetism, and also belongs to a rotor structure with uneven air gaps. The other is a rotor structure with straight line cutting between two adjacent magnetic pole grooves on the outer diameter profile of the rotor. The magnetic potential waveform of the air gap magnetic field of the rotor with the uniform air gap structure and the rotor with the pit structure can not reach the sine waveform, so that a plurality of harmonic waves exist, the performance of the motor is poor, the loss is large, the efficiency is low, and the noise is large. The rotor structure in which the pole slots are cut with straight lines therebetween can improve the above disadvantages, but the salient pole ratio is not large enough.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a permanent magnet synchronous motor rotor structure which is high in salient pole ratio and easy to process.
In order to solve the technical problem, the rotor structure of the permanent magnet synchronous motor provided by the invention comprises a rotor body and permanent magnets, wherein the permanent magnets are circumferentially distributed on the rotor body, the outer edge of the rotor body opposite to the permanent magnets is a magnetic pole arc, the magnetic pole arc is an arc concentric with the rotor body, adjacent magnetic pole arcs are inwards sunken, a boss is arranged at the sunken part, and the bottom end of the boss is connected with the magnetic pole arc in an inclined plane.
Preferably, the width of the inclined plane is greater than the width of the boss.
As the preferred scheme, the inclined plane includes first inclined plane and second inclined plane, the boss bottom, first inclined plane, second inclined plane the magnetic pole arc connects gradually, first inclined plane with the contained angle between the second inclined plane is the obtuse angle.
Preferably, the outer surface of the boss is a circular arc surface concentric with the rotor body.
Preferably, the side surface of the boss is a rectangular surface.
Preferably, the permanent magnet is a cuboid, and the chord length of the magnetic pole arc is equal to the length of the permanent magnet.
Preferably, the height of the boss is 0.6-6 times of the air gap of the motor.
Preferably, the chord length of the boss is 0.6-6 times of the air gap of the motor.
Preferably, the distance from the outer vertex of the boss to the center of the rotor body is greater than or equal to the distance from the magnetic pole arc to the center of the rotor body.
The invention has the following beneficial effects:
according to the embedded permanent magnet motor, the outer edge of the rotor body is designed to be the outer peripheral surface consisting of the circular arc and the boss, the bottom end of the boss is connected with the circular arc in an inclined plane, the magnetic resistance of the l-axis magnetic flux and the magnetic resistance of the q-axis magnetic flux can be reduced, the embedded permanent magnet motor can achieve the effect that the air gap magnetic potential waveform is very close to a sine wave like a surface-mounted permanent magnet motor, the embedded permanent magnet motor can have a larger salient pole ratio, and therefore the weak magnetic capacity of the embedded unequal air gap permanent magnet motor is greatly improved.
Drawings
Fig. 1 is a schematic view of a rotor structure of a permanent magnet synchronous motor according to an embodiment.
Fig. 2 is a schematic side view of a rotor structure of a permanent magnet synchronous motor according to an embodiment.
Wherein, 1, the rotor body; 101. a magnetic pole arc; 102. a boss; 103. a first inclined plane; 104. a second inclined plane; 2. and a permanent magnet.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
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.
Referring to fig. 1 and 2, the rotor structure of the permanent magnet synchronous motor of the present embodiment includes a rotor body 1 and permanent magnets 2, the permanent magnets 2 are circumferentially distributed on the rotor body 1, the outer edge of the rotor body 1 opposite to the permanent magnets 2 is a magnetic pole arc 101, the magnetic pole arc 101 is an arc concentric with the rotor body 1, adjacent magnetic pole arcs 101 are recessed inward, a boss 102 is disposed at the recessed portion, the bottom end of the boss 102 is connected with a magnetic pole arc 11 by an inclined surface, that is, a groove is disposed at the outer edge of the rotor body 1, the bottom end of the boss 102 is connected with the inclined surface of the magnetic pole arc 101 to form a groove, the present embodiment makes the outer edge of the rotor body 1 be an outer peripheral surface composed of an arc and the boss 102, and the bottom end of the boss 102 is connected with the arc by the inclined surface, so that the outer peripheral surface of the rotor body 1 has projections and recesses, which, the concave-convex of the peripheral surface of the rotor body 1 can convert higher harmonic components generated on the rotor into fundamental wave components, so that the embedded permanent magnet motor not only can realize that the air gap magnetic potential waveform is very close to sine waves like a surface-mounted permanent magnet motor, but also can have a larger salient pole ratio, thereby greatly improving the weak magnetic capacity of the embedded unequal air gap permanent magnet motor. Further, the width of the inclined plane between the boss 102 and the magnetic pole arc 101 is greater than that of the boss 102, and the width of the inclined plane in the direction tangential to the rotor body 1 is greater than that of the boss 102 in the direction tangential to the rotor body 1, so that the rotor can be kept to rotate stably, and the flux weakening capability of the embedded unequal air gap permanent magnet motor is improved. The inclined plane comprises a first inclined plane 103 and a second inclined plane 104, the bottom end of the boss 102, the first inclined plane 103, the second inclined plane 104 and the magnetic pole arc 101 are sequentially connected, and an included angle between the first inclined plane 103 and the second inclined plane 104 is an obtuse angle and can be in smooth transition.
The outer surface of the boss 102 of this embodiment is an arc surface concentric with the rotor body 1, and the side surface of the boss 102 is a rectangular surface. The height of the boss 102 is 0.6-6 times of the motor air gap, the chord length of the boss 102 is 0.6-6 times of the motor air gap, and the specific size of the boss 102 is determined according to the size of the motor. The permanent magnet 2 is a cuboid, and the chord length of the magnetic pole arc 101 is equal to the length of the permanent magnet 2. In addition, the distance from the outer vertex of the boss 102 to the center of the rotor body 1 is greater than or equal to the distance from the magnetic pole arc 101 to the center of the rotor body 1, that is, the radius of the outer surface of the boss 102 may be equal to or less than the radius of the magnetic pole arc 101.
The rotor can be manufactured by cutting the annular rotor body blank at the outer edge of the rotor body blank according to the height and the chord length of the boss 102, and is easy to process.
In summary, in the embodiment, the outer edge of the rotor body 1 is designed to be the outer peripheral surface consisting of the circular arc and the boss 102, and the bottom end of the boss is connected with the circular arc in an inclined plane, so that the outer peripheral surface of the rotor body 1 has the concave-convex shape, the magnetic resistance of the l-axis magnetic flux and the magnetic resistance of the q-axis magnetic flux can be reduced, the inductance is increased, and the salient pole ratio of the motor is increased.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a permanent magnet synchronous motor rotor structure, its characterized in that, includes rotor body and permanent magnet, the permanent magnet is in circumference distributes on the rotor body, with the outer fringe of the rotor body that the permanent magnet is relative is the magnetic pole arc, the magnetic pole arc be with the concentric circular arc of rotor body, it is adjacent inwards sunken between the magnetic pole arc, the depressed part is equipped with the boss, the bottom of boss with the magnetic pole arc is the inclined plane and connects.
2. The permanent magnet motor rotor structure of claim 1, wherein the width of the chamfer is greater than the width of the boss.
3. The rotor structure of a permanent magnet motor according to claim 1, wherein the inclined planes include a first inclined plane and a second inclined plane, the boss bottom end, the first inclined plane, the second inclined plane and the magnetic pole arc are connected in sequence, and an included angle between the first inclined plane and the second inclined plane is an obtuse angle.
4. The rotor structure of a permanent magnet motor according to claim 1, wherein the outer surface of the boss is a circular arc surface concentric with the rotor body.
5. The rotor structure of a permanent magnet motor according to claim 1, wherein the side surface of the boss is a rectangular surface.
6. The rotor structure of a permanent magnet synchronous motor according to claim 1, wherein the permanent magnet is a rectangular parallelepiped, and the chord length of the magnetic pole arc is equal to the length of the permanent magnet.
7. The rotor structure of the PMSM of claim 4, wherein the height of the boss is 0.6-6 times of the motor air gap.
8. The rotor structure of the permanent magnet synchronous motor as claimed in claim 4, wherein the chord length of the boss is 0.6-6 times of the air gap of the motor.
9. The rotor structure of a permanent magnet synchronous motor according to claim 4, wherein a distance from an outer vertex of the boss to a center of the rotor body is greater than or equal to a distance from the pole arc to the center of the rotor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009786.9A CN111082563A (en) | 2020-01-06 | 2020-01-06 | Rotor structure of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009786.9A CN111082563A (en) | 2020-01-06 | 2020-01-06 | Rotor structure of permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111082563A true CN111082563A (en) | 2020-04-28 |
Family
ID=70322071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010009786.9A Pending CN111082563A (en) | 2020-01-06 | 2020-01-06 | Rotor structure of permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111082563A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048024A1 (en) * | 2001-09-10 | 2003-03-13 | Chu M. T. | Rotor structure for a motor having built-in type permanent magnet |
| CN102263445A (en) * | 2010-05-31 | 2011-11-30 | 德昌电机(深圳)有限公司 | Brushless motor |
| CN106953440A (en) * | 2015-10-13 | 2017-07-14 | 株式会社安川电机 | Electric rotating machine, the manufacture method of rotor core |
| CN211456833U (en) * | 2020-01-06 | 2020-09-08 | 广州博捷电机有限公司 | Rotor structure of permanent magnet synchronous motor |
-
2020
- 2020-01-06 CN CN202010009786.9A patent/CN111082563A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048024A1 (en) * | 2001-09-10 | 2003-03-13 | Chu M. T. | Rotor structure for a motor having built-in type permanent magnet |
| CN102263445A (en) * | 2010-05-31 | 2011-11-30 | 德昌电机(深圳)有限公司 | Brushless motor |
| CN106953440A (en) * | 2015-10-13 | 2017-07-14 | 株式会社安川电机 | Electric rotating machine, the manufacture method of rotor core |
| CN211456833U (en) * | 2020-01-06 | 2020-09-08 | 广州博捷电机有限公司 | Rotor structure of permanent magnet synchronous motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209250350U (en) | A kind of high power density permanent magnet motor | |
| CN110022013B (en) | Rotor with inclined magnetic poles and asymmetric salient poles and high-performance permanent magnet motor | |
| CN109245471B (en) | alternating pole type permanent magnet vernier motor | |
| US11699931B2 (en) | Rotor structure of interior permanent magnet motor | |
| CN104882978A (en) | Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure | |
| CN103929033B (en) | A kind of permanent magnet is the permanent-magnetic synchronous motor rotor structure of arch | |
| CN104953728A (en) | Polygonal stator iron core and motor comprising polygonal stator iron core | |
| CN112615452A (en) | Rotary motor rotor and motor | |
| CN211456833U (en) | Rotor structure of permanent magnet synchronous motor | |
| CN209120022U (en) | A kind of Novel dual-rotor permanent magnet motor structure | |
| CN205864083U (en) | The permanent magnet of motor and there is its motor, compressor | |
| CN109149818A (en) | A kind of low-cost and high-performance harmonic wave cuts the continuous pole permanent-magnet synchronous machine of polar form | |
| CN113381542A (en) | Rotor punching sheet, motor rotor and permanent magnet synchronous motor | |
| CN111082563A (en) | Rotor structure of permanent magnet synchronous motor | |
| CN205070632U (en) | Magnet steel rotor and PMSM | |
| WO2013170672A1 (en) | Motor with concentrated winding, generator, and electric motor | |
| CN205141856U (en) | Rotor assembly and motor possessing same | |
| CN206135581U (en) | Electric motor rotor and permanent -magnet machine | |
| CN213305085U (en) | Rotor punching sheet of permanent magnet alternating current generator | |
| CN205610360U (en) | Concatenation formula stator and motor | |
| CN208923934U (en) | A kind of low-cost and high-performance harmonic wave cuts the continuous pole permanent-magnet synchronous machine of polar form | |
| CN211930360U (en) | Magnetic steel, synchronous motor rotor with same and synchronous motor | |
| CN209472519U (en) | Stator punching sheet for improving resonance noise, stator and motor | |
| CN203691194U (en) | Nonuniform air gap high-efficiency permanent-magnet synchronous motor | |
| CN208241417U (en) | A kind of high power density permanent magnet motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |