CN106357027A - Motor rotor and motor - Google Patents
Motor rotor and motor Download PDFInfo
- Publication number
- CN106357027A CN106357027A CN201610867159.2A CN201610867159A CN106357027A CN 106357027 A CN106357027 A CN 106357027A CN 201610867159 A CN201610867159 A CN 201610867159A CN 106357027 A CN106357027 A CN 106357027A
- Authority
- CN
- China
- Prior art keywords
- rotor core
- permanent magnet
- rotor
- motor
- distance
- 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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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
- 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
-
- 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)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a motor rotor and a motor, and relates to the technical field of electrical appliances. The motor rotor comprises a rotor core and a permanent magnet arranged in a permanent magnet slot of the rotor core, and is characterized in that the rotor core is provided with a plurality of outer edges, and each outer edge is provided with a first end and a second end opposite to the first end; the rotor core is rotated in a direction from the second end to the first end, and the distance between the first end and the center of the rotor core is smaller than the distance between the second end and the rotor core. The motor rotor and the motor provided by the invention have the advantages that the leakage flux of the tangential motor rotor can be reduced, and the core loss can be reduced, thereby improving the motor efficiency.
Description
Technical field
The present invention relates to technical field of electric appliances, in particular to a kind of rotor and motor.
Background technology
Fig. 1 is the schematic diagram of tangential rotor magnetic structure in prior art, as shown in figure 1, in tangential rotor magnetic circuit
In structure, permanent magnet effect in parallel, there are two permanent magnetism body sections to provide every pole magnetic flux to air gap, and then air gap flux density can be improved,
Especially more prominent in the case that number of poles is more.But the motor rotor construction compared to radial, tangential rotor
There is the defect that magnetic flux leakage is big, iron loss is high.
Content of the invention
The present invention is intended to provide a kind of can reduce tangential rotor magnetic flux leakage, the rotor reducing iron loss and electricity
Machine.
The invention provides a kind of rotor, including rotor core and the permanent magnet trough that is arranged on described rotor core
Interior permanent magnet, described rotor core has multiple outer rims, and described outer rim has first end and relative with described first end
Two ends, are to be rotated towards described first extreme direction by described second end in the direction of rotor core rotation, described first end
Distance apart from described rotor core center is less than distance in described rotor core for described second end.
Preferably, there is at described second end of described outer rim the lobe towards adjacent described permanent magnet.
Preferably, distance in the tangential direction at the second end of described rotor core for the described lobe be less than described forever
The half of the width of magnet slot.
Preferably, distance in the tangential direction at the second end of described rotor core for the described lobe be equal to described forever
The 1/3 of the width of magnet slot.
Preferably, described permanent magnet trough is less than described permanent magnet trough near institute away from the width of described rotor core center
State the width of rotor core center.
Preferably, on the radial cross-section of described rotor core, permanent magnet is away from the width of described rotor core center
Degree is less than the width near described rotor core center for the described permanent magnet trough.
Preferably, described permanent magnet is made up of neodymium iron boron or Ferrite Material.
Preferably, described permanent magnet trough is provided with every bore near rotor internal diameter side.
The invention provides a kind of motor, including such as any of the above-described described rotor be set in described rotor
Outer stator.
Preferably, the corresponding central angle of the tooth of described stator is α, and formed at the described first end of described rotor core opens
The corresponding central angle of mouth is β, 0.8 β≤α≤1.2 β.
Preferably, described second end of described rotor core and the distance of the inwall of described stator are equal to described rotor core
Distance with the described inwall of described positioning at maximum outside diameter, the described first end of described rotor core and the inwall of described stator
Distance be less than the distance with the described inwall of described stator at described rotor core maximum outside diameter.
Rotor according to the present invention and motor, the described first end of described rotor core is in described rotor core
The distance of the heart is less than distance in described rotor core for described second end, so that permanent magnet is outer outside rotor core
The air gap of edge one end is little, and the air gap of the other end is big, and the degree of saturation of permanent magnet end position magnetic circuit is reduced, the iron loss of motor
Reduced, and then improve electric efficiency.Meanwhile, described permanent magnet trough being smaller than away from described rotor core center
Described permanent magnet trough, near the spacing of described rotor core center, under identical rotor core external diameter rated condition, adopts
Said structure can increase the tangential length of permanent magnet, and then increased magnetic flux area, increases motor output torque ability further,
Improve motor performance.
Brief description
The accompanying drawing constituting the part of the application is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of tangential rotor magnetic structure in prior art；
Fig. 2 is the structural representation of the rotor according to the present invention；
Fig. 3 is the experimental comparison figure of the motor according to the present invention and the iron loss of motor in prior art；
Fig. 4 is rotor according to the present invention structural representation under another embodiment；
Fig. 5 is the structural representation of the motor according to the present invention.
Description of reference numerals:
10th, rotor core；11st, permanent magnet trough；111st, every bore；12nd, outer rim；121st, first end；122nd, the second end；13、
Lobe；20th, permanent magnet；30th, stator.
Specific embodiment
In conjunction with the description of accompanying drawing and the specific embodiment of the invention, can clearly understand the details of the present invention.But
It is, the specific embodiment of invention described herein to be only used for explaining the purpose of the present invention, and can not understand by any way
One-tenth is limitation of the present invention.Under the teachings of the present invention, technical staff is contemplated that the arbitrarily possible change based on the present invention
Shape, these are regarded as belonging to the scope of the present invention.It should be noted that when element is referred to as " being arranged at " another yuan
Part, it can be directly on another element or can also there is element placed in the middle.When an element is considered as " connection "
Another element, it can be directly to another element or may be simultaneously present centering elements.Term " installation ",
" being connected ", " connection " should be interpreted broadly, for example, it may be being mechanically connected or electrical connection or two element internals
Connection, can be to be joined directly together it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art,
The concrete meaning of above-mentioned term can be understood as the case may be.To describe this below with reference to the accompanying drawings and in conjunction with the embodiments in detail
Invention.
As shown in Fig. 2 the structural representation of the rotor according to the present invention, propose one in an embodiment of the present invention
Kind of rotor, rotor include rotor core 10 and be arranged on rotor core 10 permanent magnet trough 11 in permanent magnet
20, rotor core 10 has multiple outer rims 12, and outer rim 12 has first end 121 and second end 122 relative with first end 121,
The direction of described rotor core 10 rotation is to be rotated towards described first end 121 direction by described second end 122, first end
121 distances apart from rotor core 10 center are less than distance in rotor core 10 for second end 122.
Rotor according to the present invention and motor, the first end 121 of rotor core 10 is apart from rotor core 10 center
Distance distance in rotor core 10 less than the second end 122, so that permanent magnet 20 is near the outer rim of rotor core 10
The air gap of 12 one end is little, and the air gap of the other end is big, and the degree of saturation of permanent magnet 20 end position magnetic circuit is reduced, the ferrum of motor
Damage and reduce, and then improve electric efficiency.The experimental comparison figure of the iron loss of motor in motor according to the present invention and prior art,
As shown in figure 3, y-axis represents the iron loss of motor, x-axis express time in Fig. 3, the motor using the rotor of the present invention is running
Under equal conditions tested with using the motor of rotor of the prior art under state, using electricity of the prior art
The motor of machine rotor iron loss under operation is 15.6w, and adopts the motor of the rotor of the present invention in running status
Under iron loss be 12.6w, iron loss reduces about 19%, and electric efficiency improves about 0.6%.
In order to further appreciate that the rotor in the embodiment of the present invention, it will be further explained below and illustrate.
Rotor core 10 has multiple outer rims 12, and outer rim 12 has first end 121 and second end relative with first end 121
122, rotated to first end 121 direction from the second end 122 in rotor core 10, first end 121 is apart from rotor core 10 center
Distance distance apart from rotor core 10 center less than the second end 122.From the cross section of outer rim 12, point in outer rim 12 away from
Can be in increase trend from first end 121 to the second end 122 entirety with a distance from rotor core 10 center, according to increase
Degree and trend outer rim 12 can take on a different shape, and for example, the shape of outer rim 12 can be by the camber line of two or more
Section is connected to form it is also possible to be connected to form with straightway by arc.So, so that permanent magnet 20 is near rotor core 10
The air gap of the second end 122 side of outer rim 12 is little, and the air gap of first end 121 side is big, and then reduces permanent magnet 20 end position
The degree of saturation of magnetic circuit, reduces the iron loss of motor.Because permanent magnet 20 end saturation can lead to relevant position appearance larger
Electromagnetic force, causes the vibration noise of motor, using said structure, can weaken the degree of saturation of permanent magnet 20 end, and then subtract
The vibration noise of small machine.
As shown in Fig. 2 when rotor is from the second end 122 to first end 121 rotate counterclockwise, d axle can be arranged left
Gas length at rotor core 10 outer rim 12 of side from the second end 122 to first end 121 by being gradually reduced greatly, setting d axle is right
Air gap at side rotor core 10 outer rim 12 is even air gap, and gas length is equal to the most stingy between stator 30 and rotor core 10
Gap length, the gas length at rotor core 10 outer rim 12 on the left of d axle is more than the gas at d axle right rotor iron core 10 outer rim 12
Gap length.In motor operating state, because quadrature axis armature reaction plays increasing magnetic action to the front half-shadow of main field, rear half-shadow is risen
Demagnetizing effect, therefore front half-shadow adopts the larger magnetic circuit part of air gap, and rear half-shadow adopts the less magnetic circuit part of air gap, Ke Yi
Reduce the performance of the power output ensureing motor while motor iron loss.
In one preferred embodiment, as shown in Fig. 2 have at the second end 122 of outer rim 12 towards adjacent forever
The lobe 13 of magnet 20.Because permanent magnet 20 can be subject to centrifugal forces when rotor rotates, corresponding in permanent magnet trough 11
The lobe 13 of the side setting at the second end 122 of rotor core 10 outer rim 12 can be used for permanent magnet 20 and then fixing,
And then prevent permanent magnet 20 due to being flown out by centrifugal force.Lobe 13 is tangential at the second end 122 of rotor core 10
Distance on direction is less than the half of the width of permanent magnet trough 11.In an embodiment being more highly preferred to, lobe 13 exists
1/3 of the width b being equal to permanent magnet trough 11 apart from a in tangential direction at second end 122 of rotor core 10, so, that is,
Can ensure that the reliability of motor operation it can also be ensured that the performance of motor.
In one preferred embodiment, structure under another embodiment for the rotor according to the present invention is shown
It is intended to, as shown in figure 4, permanent magnet trough 11 is smaller than permanent magnet trough 11 near rotor core away from rotor core 10 center
The spacing of 10 centers.It is also that the shape of permanent magnet trough 11 substantially can be trapezoidal.It is arranged on the permanent magnetism in permanent magnet trough 11
The shape of body 20 needs to match with permanent magnet trough 11, and so, permanent magnet 20 can also be following shape, and that is, permanent magnet 20 is substantially
Can be trapezoidal, its bottom and upper segment can not be straight line.On the radial cross-section of rotor core 10, permanent magnet 20 away from turn
The width of sub- iron core 10 center is less than the width near rotor core 10 center for the permanent magnet trough 11.Because permanent magnet 20 is in ladder
Shape structure, in motor high-speed rotation, even if rotor does not do any safeguard procedures, permanent magnet 20 is still fixed in permanent magnet
In groove 11, be not in the danger destroying or flying out.Under the conditions of the external diameter identical of rotor core 10, with employing in outer rim 12
The second end 122 at have and compare towards the mode of the lobe 13 of adjacent permanent magnet 20, using the manner of trapezium structure
Permanent magnet 20 radical length can be increased, also increase magnetic flux area, further increase the torque capacity of motor output, carry
The high performance of motor.In general, permanent magnet 20 can be made up it is also possible to by other permanent magnetism of neodymium iron boron or Ferrite Material
Material is made.
In one preferred embodiment, permanent magnet trough 11 is provided with every bore near rotor core 10 internal diameter side
111.Each permanent magnet trough 11 can be both provided with every bore 111 on the both sides of rotor core 10 internal diameter side, every bore 111
Axis direction along rotor core 10 runs through rotor core 10.Arrange can effectively optimize magnetic circuit every bore 111, improve motor
Rotor and electric efficiency, are conducive to the even running of motor, reduce noise.
The structural representation of the motor according to the present invention, as shown in figure 5, present invention also offers a kind of motor, including such as
Any of the above-described rotor and the stator 30 being set in outside rotor.The corresponding central angle of tooth of stator 30 is α, rotor ferrum
The corresponding central angle of opening being formed at the first end 121 of core 10 is β, when under conditions of α and β satisfaction 0.8 β≤α≤1.2 β, can
To effectively reduce the iron loss of motor, improve the output torque of motor.When β and α is roughly equal, the performance of motor reaches optimum shape
State.Further, since the structure of rotor core 10 makes the second end 122 of rotor core 10 and the distance of the inwall of stator 30 be equal to
Distance with the inwall of positioning at rotor core 10 maximum outside diameter, the first end 121 of rotor core 10 and the inwall of stator 30
Distance is less than the distance with the inwall of stator at rotor core 10 maximum outside diameter.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
According to the present invention, the first end 121 of rotor core 10 distance apart from rotor core 10 center is less than the second end
122 distances in rotor core 10, so that the air gap near rotor core 10 outer rim 12 one end for the permanent magnet 20 is little,
The air gap of the other end is big, and the degree of saturation of permanent magnet 20 end position magnetic circuit is reduced, and the iron loss of motor is reduced, and then
Improve electric efficiency.Because permanent magnet 20 end saturation can lead to relevant position larger electromagnetic force, cause motor
Vibration noise, using said structure, can weaken the degree of saturation of permanent magnet 20 end, and then reduce the vibration noise of motor.
Meanwhile, using the lobe 13 having at the second end 122 of outer rim 12 towards adjacent permanent magnet 20 or permanent magnet
Groove 11 is away from the mode being smaller than the spacing near rotor core 10 center for the permanent magnet trough 11 of rotor core 10 center
To permanent magnet 20 and then fixing, and then prevent permanent magnet 20 due to being flown out by centrifugal force.Outside identical rotor core 10
Under the rated condition of footpath, permanent magnet trough 11 is smaller than near rotor ferrum away from rotor core 10 center using permanent magnet trough 11
The mode of the spacing of core 10 center can also increase the tangential length of permanent magnet 20, and then increased magnetic flux area, increases further
Plus motor output torque ability, improve motor performance.The corresponding central angle of tooth of stator 30 is the first of α and rotor core 10
When holding the corresponding central angle of opening being formed at 121 to meet certain condition for β, the iron loss of motor can be effectively reduced, improve electricity
The output torque of machine.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (11)
1. a kind of rotor, including rotor core (10) and be arranged in the permanent magnet trough (11) of described rotor core (10)
Permanent magnet (20) it is characterised in that described rotor core (10) has multiple outer rims (12), described outer rim (12) has first
End (121) and second end (122) relative with described first end (121), the direction that described rotor core (10) rotates is by institute
State the second end (122) to be rotated towards described first end (121) direction, described first end (121) is apart from described rotor core
(10) distance at center is less than the distance apart from described rotor core (10) center for described second end (122).
2. rotor according to claim 1 is it is characterised in that described second end (122) place of described outer rim (12)
There is the lobe (13) towards adjacent described permanent magnet (20).
3. rotor according to claim 2 is it is characterised in that described lobe (13) is in described rotor core (10)
The tangential direction at the second end (122) place on distance be less than described permanent magnet trough (11) width half.
4. rotor according to claim 3 is it is characterised in that described lobe (13) is in described rotor core (10)
The tangential direction at the second end (122) place on distance be equal to described permanent magnet trough (11) width 1/3.
5. rotor according to claim 1 is it is characterised in that described permanent magnet trough (11) is away from described rotor core
(10) width of center is less than the width near described rotor core (10) center for the described permanent magnet trough (11).
6. rotor according to claim 1 is it is characterised in that radial cross-section in described rotor core (10)
On, described permanent magnet (20) is less than described permanent magnet trough (11) near described away from the width of described rotor core (10) center
The width of rotor core (10) center.
7. rotor according to claim 1 is it is characterised in that described permanent magnet (20) is by neodymium iron boron or ferrite material
Material is made.
8. rotor according to claim 1 is it is characterised in that described permanent magnet trough (11) is near described rotor core
(10) internal diameter side is provided with every bore (111).
9. a kind of motor is it is characterised in that including described rotor as arbitrary in claim 1 to 8 and being set in described electricity
Stator (30) outside machine rotor.
10. motor according to claim 9 it is characterised in that described stator (30) the corresponding central angle of tooth be α, institute
The corresponding central angle of opening stating described first end (121) the place formation of rotor core (10) is β, 0.8 β≤α≤1.2 β.
11. motors according to claim 9 it is characterised in that described second end (122) of described rotor core (10) with
The distance of the inwall of described stator (30) is equal to described interior with described stator (30) at described rotor core (10) maximum outside diameter
The distance of wall, the described first end (121) of described rotor core (10) and the distance of the inwall of described stator (30) are less than described
Distance with the described inwall of described stator (30) at rotor core (10) maximum outside diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867159.2A CN106357027B (en) | 2016-09-29 | 2016-09-29 | Rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867159.2A CN106357027B (en) | 2016-09-29 | 2016-09-29 | Rotor and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106357027A true CN106357027A (en) | 2017-01-25 |
| CN106357027B CN106357027B (en) | 2018-10-23 |
Family
ID=57866083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610867159.2A Active CN106357027B (en) | 2016-09-29 | 2016-09-29 | Rotor and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106357027B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600326A (en) * | 2020-12-09 | 2021-04-02 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor and washing machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4658167A (en) * | 1984-05-08 | 1987-04-14 | Dso "Elprom" | Rotor with permanent magnets for an electrical machine |
| JP2001061240A (en) * | 1999-08-23 | 2001-03-06 | Daido Steel Co Ltd | Motor that rotates in one direction |
| US20040217667A1 (en) * | 2003-02-18 | 2004-11-04 | Popov Vladimir Vladimirovich | Rotor assembly and stator assembly for an electrical machine |
| CN201708671U (en) * | 2010-06-29 | 2011-01-12 | 西安磁林电气有限公司 | Permanent magnetic slotless brushless direct current motor |
| CN102545433A (en) * | 2012-01-09 | 2012-07-04 | 美的威灵电机技术（上海）有限公司 | Tangential rotor for rotating motor |
| CN206135583U (en) * | 2016-09-29 | 2017-04-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and motor |
-
2016
- 2016-09-29 CN CN201610867159.2A patent/CN106357027B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4658167A (en) * | 1984-05-08 | 1987-04-14 | Dso "Elprom" | Rotor with permanent magnets for an electrical machine |
| JP2001061240A (en) * | 1999-08-23 | 2001-03-06 | Daido Steel Co Ltd | Motor that rotates in one direction |
| US20040217667A1 (en) * | 2003-02-18 | 2004-11-04 | Popov Vladimir Vladimirovich | Rotor assembly and stator assembly for an electrical machine |
| CN201708671U (en) * | 2010-06-29 | 2011-01-12 | 西安磁林电气有限公司 | Permanent magnetic slotless brushless direct current motor |
| CN102545433A (en) * | 2012-01-09 | 2012-07-04 | 美的威灵电机技术（上海）有限公司 | Tangential rotor for rotating motor |
| CN206135583U (en) * | 2016-09-29 | 2017-04-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600326A (en) * | 2020-12-09 | 2021-04-02 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor and washing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106357027B (en) | 2018-10-23 |
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Effective date of registration: 20180816 Address after: 519070, Jinji Hill Road, front hill, Zhuhai, Guangdong Applicant after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Address before: 519070 science and technology building, 789 Jinji Road, Qianshan, Zhuhai, Guangdong Applicant before: Zhuhai Gree Energy Saving & Refrigerating Technology Resarch Center Co., Ltd. |
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