CN105846627A - Rotor structure for improving permanent magnet motor power and torque density - Google Patents
Rotor structure for improving permanent magnet motor power and torque density Download PDFInfo
- Publication number
- CN105846627A CN105846627A CN201610174193.1A CN201610174193A CN105846627A CN 105846627 A CN105846627 A CN 105846627A CN 201610174193 A CN201610174193 A CN 201610174193A CN 105846627 A CN105846627 A CN 105846627A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- rotor
- bar
- trough
- shaped trough
- 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
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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
- H02K21/12—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
- 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
- H02K1/26—Rotor cores with slots for windings
- H02K1/265—Shape, form or location of the slots
-
- 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]
-
- 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)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a rotor structure for improving permanent magnet motor power and torque density. The rotor is obtained through laminating silicon steel sheets. The rotor is provided with a trough for embedding a permanent magnet. The trough for embedding the permanent magnet is a V-shaped trough which faces the outer circle of the rotor. The left top end and the right top end of the V-shaped trough is provided with a plurality of symmetrical elongated troughs which are communicated with the V-shaped trough. Compared with the rotor structure of an existing permanent magnet motor, the rotor structure has advantages of improving a magnetic flux path through arranging the elongated troughs, reducing magnetic leakage, improving utilization rate of the permanent magnet, adding a saliency effect, improving efficiency and power density of the motor, reducing cogging torque, simplifying a motor optimization program and improving design efficiency.
Description
Technical field
The present invention relates to a kind of rotor structure for permanent magnet motor, especially a kind of built-in rotor structure of permanent-magnet motor, it is adaptable to
The application scenario having limited motor volume, weight, power and torque is (such as compressor, air-conditioning draught fan, electric tool
With electric automobile etc.), belong to specific type of electric machine technical field.
Background technology
Magneto has the distinguishing features such as the close height of power, efficiency is high, reliability is high, is producing and is obtaining in sphere of life
It is widely applied.Due to rare earth permanent magnet resource scarcity, the manufacturing cost of magneto becomes magneto large-scale application
Bottleneck.Therefore the optimization to permanent magnet motor structure designs, and improves its power and torque density becomes domestic and international expert and
The research topic of persons.
Interior permanent magnet machines is the permanent magnet motor structure of the embedded permanent magnet of a kind of rotor, and its operation principle is: stator winding
The rotating excitation field that energising produces, the magnetic field interaction that the permanent magnet built-in with rotor produces makes rotor rotate, and produces
Raw torque.Owing to motor d, q axle magnetic circuit is asymmetric, the synthesis that torque is permanent-magnet torque and reluctance torque that motor produces.
Therefore, the optimization of rotor magnetic circuit structural, embedded permanent magnet trough is designed, and to improve magneto power and torque density,
Reduce permanent magnetism consumption, reduction manufacturing cost has important theory significance and economic worth.
Summary of the invention
It is an object of the invention to provide the rotor structure of a kind of magneto, use this structure under same volume, Ke Yiti
The power of high magneto and torque density, and realize the high-efficiency operation of motor.
The technical solution used in the present invention is: a kind of rotor structure improving magneto power and torque density, including turning
Son, the bar-shaped trough that connects with permanent magnet trough of permanent magnet trough and permanent magnet；
Described rotor is formed by silicon steel plate stacking, is provided with the permanent magnet trough for embedding permanent magnet, institute on described rotor
Stating permanent magnet trough is the V-shape groove towards rotor outer circle, has and V-shape groove on the top, left and right of described V-shape groove
The bar-shaped trough of some symmetries of connection.
As preferably, rotor center of circle angle shared by the bar-shaped trough of described some symmetries is 22.5 °/p～67.5 °/p (p is for the most right
Number), the width of described some bar-shaped troughs is 0.25Wm～0.5Wm(WmFor permanent magnet radial width), described some bar shapeds
Width between groove is 0.1Wm～0.25Wm.As its number n ＞ 1, shared by each bar-shaped trough, the angle of rotor central angle is each
Unequal, difference angle is 5 °/p～20.5 °/p.
Described some bar-shaped troughs, centered by the rotor center of circle, a width of t, angle is α；Between described some bar-shaped troughs
Spacing is m；Number, angle, width and the spacing of described some bar-shaped troughs are uncertain value, can enter as required
Row sum-equal matrix.By adjusting the number of bar-shaped trough, and the angle of bar-shaped trough, width, separation are optimized design and obtain
Different output, torque.The present invention is by changing rotor magnetic circuit path, and is adjusted rotor magnetic circuit magnetic resistance,
And then improve air gap magnetic density waveform, improve power and torque density.
Beneficial effects of the present invention:
1) rotor structure used, improves permanent magnetic circuit, reduces permanent magnetism leakage field, improves the utilization rate of permanent magnet,
Improve power and torque density.
2) rotor structure used, by adjusting the angle of bar-shaped trough, width, number, it is possible to obtain different output
Characteristic, improves the designability of motor different operating requirement, simplify design program, it is to avoid design iterations causes
The wasting of resources.
3) rotor structure used, changes the overtone order of cogging torque, it is achieved that mutually supporting of cogging torque harmonic wave
Disappear, reduce cogging torque.
Accompanying drawing explanation
Fig. 1 is slot shape of rotor structure chart of the present invention.
Fig. 2 is the rotor structure figure of embodiments of the invention 1.
Fig. 3 is the rotor structure figure of embodiments of the invention 2.
Fig. 4 is the rotor structure figure of embodiments of the invention 3.
Fig. 5 is the rotor structure figure of embodiments of the invention 4.
Detailed description of the invention
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of rotor structure improving magneto power and torque density of the present invention, rotor 1 is by silicon steel
Sheet is overrided to form, and is provided with the permanent magnet trough 2 for embedding permanent magnet 4, described permanent magnet trough 2 on described rotor 1
For the V-shape groove towards rotor 1 cylindrical, connect if having on the top, left and right of described V-shape groove with V-shape groove
Dry symmetrical bar-shaped trough 3.Described some bar-shaped troughs, centered by the rotor center of circle, a width of t, angle is α；If it is described
Spacing between dry bar-shaped trough is m；Number, angle, width and the spacing of described some bar-shaped troughs are uncertain value,
Can be adjusted as required.By adjusting the number of bar-shaped trough, and the angle of bar-shaped trough, width, separation are entered
Row optimizes the different output of design acquisition, torque.Shared by the bar-shaped trough of described some symmetries, rotor center of circle angle is
22.5 °/p～67.5 °/p (p is number of pole-pairs), the width of described some bar-shaped troughs is 0.25Wm～0.5Wm(WmFor permanent magnet
Radial width), the width between described some bar-shaped troughs is 0.1Wm～0.25Wm.As its number n ＞ 1, each bar shaped
Shared by groove, the angle of rotor central angle is each unequal, and difference angle is 5 °/p～20.5 °/p.
Embodiment 1
As in figure 2 it is shown, this embodiment is 6 pole 9 groove structures, use centralized winding construction, rotor 1 permanent magnet trough 2
Top, left and right respectively have a symmetrical bar-shaped trough 3.Described bar-shaped trough 3 width t=0.5mm, angle [alpha]=13 °.
Embodiment 2
As it is shown on figure 3, this embodiment is 6 pole 18 groove structures, use distributed winding construction, rotor 1 permanent magnet trough 2
Top, left and right respectively have three symmetrical bar-shaped troughs 3.Described bar-shaped trough 3 width t1=t2=t3=0.8mm, angle
α1=α2=α3=8 °.
Embodiment 3
As shown in Figure 4, this embodiment is 8 pole 12 groove structures, uses centralized winding construction, rotor 1 permanent magnet trough 2
Top, left and right respectively have two symmetrical bar-shaped troughs 3.Described bar-shaped trough 3 width t=0.6mm, angle [alpha]1=5 °,
α2=7 °.
Embodiment 4
As it is shown in figure 5, this embodiment is 8 pole 24 groove structures, use distributed winding construction, rotor 1 permanent magnet trough 2
Top, left and right respectively have two symmetrical bar-shaped troughs 3.Described bar-shaped trough 3 width t=0.55mm, angle [alpha]1=8 °,
α2=4 °.
It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention,
Can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.In the present embodiment
The clearest and the most definite each ingredient all can use prior art to be realized.
Claims (3)
1. the rotor structure improving magneto power and torque density, it is characterised in that: include rotor, permanent magnetism
Bar-shaped trough that body groove connects with permanent magnet trough and permanent magnet；
Described rotor is formed by silicon steel plate stacking, is provided with the permanent magnet trough for embedding permanent magnet, institute on described rotor
Stating permanent magnet trough is the V-shape groove towards rotor outer circle, has and V-shape groove on the top, left and right of described V-shape groove
The bar-shaped trough of some symmetries of connection.
A kind of rotor structure improving magneto power and torque density the most according to claim 1, its feature exists
In: shared by the bar-shaped trough of described some symmetries, rotor center of circle angle is 22.5 °/p～67.5 °/p, and p is number of pole-pairs, bar-shaped trough
Width is 0.25Wm～0.5Wm, WmFor permanent magnet radial width, the width between bar-shaped trough is 0.1Wm～0.25Wm。
A kind of rotor structure improving magneto power and torque density the most according to claim 1, its feature exists
In: during described bar-shaped trough number n ＞ 1, shared by each bar-shaped trough, the angle of rotor central angle is each unequal, and difference angle is
5 °/p～20.5 °/p.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610174193.1A CN105846627A (en) | 2016-03-24 | 2016-03-24 | Rotor structure for improving permanent magnet motor power and torque density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610174193.1A CN105846627A (en) | 2016-03-24 | 2016-03-24 | Rotor structure for improving permanent magnet motor power and torque density |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105846627A true CN105846627A (en) | 2016-08-10 |
Family
ID=56584471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610174193.1A Pending CN105846627A (en) | 2016-03-24 | 2016-03-24 | Rotor structure for improving permanent magnet motor power and torque density |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105846627A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453502A (en) * | 2017-08-31 | 2017-12-08 | 广东美芝制冷设备有限公司 | Rotor, motor and compressor |
| USD960086S1 (en) | 2017-07-25 | 2022-08-09 | Milwaukee Electric Tool Corporation | Battery pack |
| US11780061B2 (en) | 2019-02-18 | 2023-10-10 | Milwaukee Electric Tool Corporation | Impact tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872819A (en) * | 2012-12-10 | 2014-06-18 | 艾默生环境优化技术(苏州)有限公司 | Rotor assembly and permanent magnet motor including the same |
| CN104104168A (en) * | 2014-07-16 | 2014-10-15 | 东南大学 | Stator and rotor structure of built-in permanent magnet brushless direct current motor |
| CN104201808A (en) * | 2014-09-12 | 2014-12-10 | 东南大学 | Hybrid excitation fault tolerant motor system based on automatic position detection |
| CN104882978A (en) * | 2015-05-07 | 2015-09-02 | 东南大学 | Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure |
| CN104937815A (en) * | 2013-01-24 | 2015-09-23 | 三菱电机株式会社 | Permanent-magnet-type rotating electric mechanism |
| CN204886471U (en) * | 2015-09-01 | 2015-12-16 | 浙江绿源电动车有限公司 | Rotor, motor and electric motor car |
-
2016
- 2016-03-24 CN CN201610174193.1A patent/CN105846627A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872819A (en) * | 2012-12-10 | 2014-06-18 | 艾默生环境优化技术(苏州)有限公司 | Rotor assembly and permanent magnet motor including the same |
| CN104937815A (en) * | 2013-01-24 | 2015-09-23 | 三菱电机株式会社 | Permanent-magnet-type rotating electric mechanism |
| CN104104168A (en) * | 2014-07-16 | 2014-10-15 | 东南大学 | Stator and rotor structure of built-in permanent magnet brushless direct current motor |
| CN104201808A (en) * | 2014-09-12 | 2014-12-10 | 东南大学 | Hybrid excitation fault tolerant motor system based on automatic position detection |
| CN104882978A (en) * | 2015-05-07 | 2015-09-02 | 东南大学 | Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure |
| CN204886471U (en) * | 2015-09-01 | 2015-12-16 | 浙江绿源电动车有限公司 | Rotor, motor and electric motor car |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD960086S1 (en) | 2017-07-25 | 2022-08-09 | Milwaukee Electric Tool Corporation | Battery pack |
| US11462794B2 (en) | 2017-07-25 | 2022-10-04 | Milwaukee Electric Tool Corporation | High power battery-powered system |
| US11476527B2 (en) | 2017-07-25 | 2022-10-18 | Milwaukee Electric Tool Corporation | High power battery-powered system |
| CN107453502A (en) * | 2017-08-31 | 2017-12-08 | 广东美芝制冷设备有限公司 | Rotor, motor and compressor |
| CN107453502B (en) * | 2017-08-31 | 2023-07-04 | 广东美芝制冷设备有限公司 | Motor rotor, motor and compressor |
| US11780061B2 (en) | 2019-02-18 | 2023-10-10 | Milwaukee Electric Tool Corporation | Impact tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160810 |
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| RJ01 | Rejection of invention patent application after publication |