CN204244048U - Motor - Google Patents
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- CN204244048U CN204244048U CN201420721849.3U CN201420721849U CN204244048U CN 204244048 U CN204244048 U CN 204244048U CN 201420721849 U CN201420721849 U CN 201420721849U CN 204244048 U CN204244048 U CN 204244048U
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- auxiliary tank
- magnet steel
- steel groove
- groove structure
- motor
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model provides a kind of motor.Motor comprises rotor, and rotor comprises: rotor core, rotor core is provided with magnet steel groove structure, is provided with permanent magnet in magnet steel groove structure, and magnet steel groove structure is circular arc; Auxiliary tank, auxiliary tank is between magnet steel groove structure and rotor core outer, and auxiliary tank and magnet steel groove structure are arranged correspondingly, and auxiliary tank is circular arc, the bearing of trend of auxiliary tank is identical with the bearing of trend of magnet steel groove structure, and auxiliary tank and magnet steel groove structure protruding in the same way.This motor effectively can reduce noise.
Description
Technical field
The utility model relates to motor apparatus field, in particular to a kind of motor.
Background technology
As illustrated in fig. 1 and 2, rotor comprises rotor core 10 ', and time unloaded, motor-field as shown in Figure 1, and during load, motor-field as shown in Figure 2.In prior art, permanent-magnet synchronous reluctance motor has the advantage of high-efficiency and low-cost, in practice process, has magnet steel groove in usual rotor, and is embedded in magnet steel groove by permanent magnet, thus make full use of reluctance torque.The Driving Torque of motor is synthesized by permanent-magnet torque and reluctance torque, and due to the design feature of motor own, the fluctuation of DQ axle inductance difference is comparatively large, causes reluctance torque fluctuation wherein comparatively large, makes motor produce larger vibration.By magnet steel size and position in conversion rotor, torque pulsation can not be effectively reduced under many circumstances or reduce motor performance.
If slot on rotor core, although can reduce noise to a certain extent, can occupy d axle magnetic circuit space, magnetic linkage total value can slightly be declined, and therefore motor performance can slightly decline; And when the weak magnetic component of motor is not 0, the centre position of the front pole (direction of rotation is anterior) of every block magnet steel and the armature field corresponding to rear pole (direction of rotation rear portion) changes, and this form cannot be dealt with problems.
Utility model content
Main purpose of the present utility model is to provide a kind of motor, causes greatly with the torque pulsation solving motor of the prior art the problem that noise is large.
To achieve these goals, according to an aspect of the present utility model, a kind of motor is provided, comprise rotor, rotor comprises: rotor core, rotor core is provided with magnet steel groove structure, be provided with permanent magnet in magnet steel groove structure, magnet steel groove structure is circular arc; Auxiliary tank, auxiliary tank is between magnet steel groove structure and rotor core outer, and auxiliary tank and magnet steel groove structure are arranged correspondingly, and auxiliary tank is circular arc, the bearing of trend of auxiliary tank is identical with the bearing of trend of magnet steel groove structure, and auxiliary tank and magnet steel groove structure protruding in the same way.
Further, auxiliary tank is double-deck, and arranges along the spaced radial of rotor core, forms iron core passage between two-layer auxiliary tank.
Further, the outer of rotor core has arc-shaped concave, and arc-shaped concave and auxiliary tank are arranged correspondingly, and arc-shaped concave is concentric with auxiliary tank, forms iron core passage between arc-shaped concave and auxiliary tank.
Further, the two ends angularly a of the iron core passage of auxiliary tank, angle a determines according to formula 1,
A=(1.5 ~ 1.8) × 360/Z formula 1
Wherein, Z is the stator number of teeth.
Further, auxiliary tank is arranged in angular regions δ max, and angular regions δ max determines according to formula 2,
δ max=θ+a formula 2
Wherein, θ is weak magnetic deviation, and θ determines according to the difference in inductance of the d axle of motor and motor q axle, and a limit of δ max is the center line of adjacent two magnetic poles.
Further, one deck of the close rotor core outer of auxiliary tank is upper strata groove, one deck away from rotor core outer of auxiliary tank is lower floor's groove, minor distance of W 1 between upper strata groove and rotor core outer is 0.3mm to 0.4mm, and the minor distance of W 2 between lower floor's groove and rotor core outer is 0.4mm to 0.6mm.
Further, motor also comprises stator, and stator comprises: stator core; Stator tooth, stator tooth is arranged around the circumferential uniform intervals of stator core, and extends along the radial direction of stator core.
Further, form iron core passage between upper strata groove and lower floor's groove, the thickness W3 of iron core passage is greater than the width W 4 of the stator tooth of 0.3 times.
Further, magnet steel groove structure comprises at least one deck magnet steel groove, is provided with permanent magnet in each magnet steel groove, has gap between the outer of permanent magnet and the interior edge of corresponding magnet steel groove, and the span in gap is 0.1mm to 0.3mm.
Further, auxiliary tank is air groove.
Application the technical solution of the utility model, motor comprises rotor, and rotor comprises rotor core and auxiliary tank, rotor core is provided with magnet steel groove structure, is provided with permanent magnet in magnet steel groove structure, and magnet steel groove structure is circular arc; Auxiliary tank is between magnet steel groove structure and rotor core outer, and auxiliary tank and magnet steel groove structure are arranged correspondingly, auxiliary tank is circular arc, and the bearing of trend of auxiliary tank is identical with the bearing of trend of magnet steel groove structure, and auxiliary tank and magnet steel groove structure protruding in the same way.By arranging auxiliary tank on rotor, auxiliary tank corresponds to magnet steel groove vibrational power flow, auxiliary tank can be utilized like this to form iron core passage, the weak magnetic component Central Plains of winding can be utilized through the part magnetic linkage of iron core short circuit by the process of this auxiliary tank, generation torque exports, utilize this torque to export to neutralize, to improve torque pulsation, and then realize the object reducing noise.Wherein, the rear edge of magnet steel groove structure refers to the rear end in the rotation direction of rotor.This auxiliary tank and corresponding magnet steel groove structure extend in the same way, and protrudingly in the same way can reduce the space between rotor core outer and magnet steel groove structure that auxiliary tank takies.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the magnetic field schematic diagram of motor of the prior art;
Fig. 2 shows the structural representation of the weak magnetic area of motor of the prior art;
Fig. 3 shows the sectional structure schematic diagram of the motor according to embodiment of the present utility model;
Fig. 4 shows the enlarged drawing at the B place in Fig. 3;
Fig. 5 shows the sectional structure schematic diagram of the motor of the individual layer auxiliary tank according to another embodiment of the present utility model; And
Fig. 6 shows prior art and torque of the present utility model exports comparison diagram.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, rotor core; 11, magnet steel groove structure; 12, permanent magnet; 20, auxiliary tank; 21, upper strata groove; 22, lower floor's groove; 31, stator tooth.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As shown in Fig. 3 to 6, according to embodiment of the present utility model, motor comprises rotor, rotor comprises rotor core 10 and auxiliary tank 20, rotor core 10 is provided with magnet steel groove structure 11, is provided with permanent magnet 12 in magnet steel groove structure 11, magnet steel groove structure 11 is circular arc; Auxiliary tank 20 is between magnet steel groove structure 11 and rotor core 10 outer, and auxiliary tank 20 and magnet steel groove structure 11 are arranged correspondingly, auxiliary tank 20 is circular arc, the bearing of trend of auxiliary tank 20 is identical with the bearing of trend of magnet steel groove structure 11, and auxiliary tank 20 is protruding in the same way with magnet steel groove structure 11.By arranging auxiliary tank 20 on rotor, auxiliary tank 20 corresponds to magnet steel groove structure 11 and arranges, auxiliary tank 20 can be utilized like this to form iron core passage, the weak magnetic component Central Plains of winding can be utilized through the part magnetic linkage of iron core short circuit in the process by this auxiliary tank 20, generation torque exports, utilize this torque to export to neutralize, to improve torque pulsation, and then realize the object reducing noise.Wherein, the rear edge of magnet steel groove structure 11 refers to the rear end in the rotation direction of rotor.This auxiliary tank 20 and corresponding magnet steel groove structure 11 extend in the same way, and protrudingly in the same way can reduce the space between rotor core 10 outer and magnet steel groove structure 11 that auxiliary tank 20 takies.
As shown in Figure 6, by auxiliary tank 20, Driving Torque is pulsed to reduce, to reduce noise.
Wherein, auxiliary tank 20 can be individual layer, bilayer or multilayer.
If auxiliary tank 20 is double-deck, and arranges along the spaced radial of rotor core 10, then form iron core passage between two-layer auxiliary tank 20.
As shown in Figure 5, if auxiliary tank 20 is individual layer, then correspondingly the corresponding position, outer of rotor core 10 has and auxiliary tank 20 depression in the same way, and to form iron core passage, this is recessed to form arc-shaped concave, and this arc-shaped concave is concentric with auxiliary tank 20.
The two ends angularly a of the iron core passage of this auxiliary tank 20, angle a refer to the angle between the normal of the outer of the rotor core that the two ends of the center arc of the Width of iron core passage are corresponding, and angle a determines according to formula 1,
A=(1.5 ~ 1.8) × 360/Z formula 1
Wherein, Z is the stator number of teeth.Also namely, angle a is the 360/Z of 1.5 to 1.8 times.
This auxiliary tank 20 is arranged in angular regions δ max, and angular regions δ max determines according to formula 2,
δ max=θ+a formula 2
Wherein, θ is weak magnetic deviation, θ determines according to the difference in inductance of the d axle of motor and motor q axle, d axle and q axle inductance difference are determined by electric machine structure, when electric machine structure is determined, the difference in inductance of d axle and q axle is fixed, the inductance difference of d axle and the q axle magnetic linkage that to be magnetic circuit produce from quadrature axis and the magnetic linkage difference produced with d-axis, d-axis refers to pole center line, and quadrature axis refers to interpolar center line; Wherein limit of angular regions δ max is the center line of adjacent two magnetic poles, and this edge rotor rotation direction forms another limit of this angular regions δ max after rotating θ+a angle.
Under motor does not pass into current conditions, no-load magnetic field distribution as shown in Figure 1; Motor-field is symmetrical along pole center line; Because this motor is embedded permanent magnet type, its d axle is different with the inductance of q axle, during operation, there is weak magnetic deviation θ, that is: in composite magnetic power Fig. 2 of three-phase current, the amplitude position of F is ahead of q axle angle of rotor, and this angle is called weak magnetic deviation θ; Can find in Fig. 2, the composite magnetic power that winding produces interacts with former no-load magnetic field, and carry out Vector modulation with no-load magnetic field, namely the rear pole place of rotor magnetic pole direction of rotation forms territory, a slice weak magnetic area; Weak magnetic deviation θ determines according to motor d axle and q axle inductance difference.This kind of set-up mode is not the excellent noise reduction effect of the situation of 0 to weak magnetic component.
In the present embodiment, motor also comprises stator, and stator comprises stator core and stator tooth 31.Stator tooth 31 is arranged around the circumferential uniform intervals of stator core, and extends along the radial direction of stator core.
One deck of close rotor core 10 outer of auxiliary tank 20 is upper strata groove 21, one deck away from rotor core 10 outer of auxiliary tank 20 is lower floor's groove 22, minor distance of W 1 between upper strata groove 21 and rotor core 10 outer is 0.3mm to 0.4mm, and the minor distance of W 2 between lower floor's groove 22 and rotor core 10 outer is 0.4mm to 0.6mm.There are two thinnest parts with the surface, outer of rotor core 10 in auxiliary tank 20, these two thinnest parts are called rib, and its thickness should meeting under mechanical strength condition, as far as possible thin.
Form iron core passage between upper strata groove 21 and lower floor's groove 22, the thickness W3 of iron core passage is greater than the width W 4 of the stator tooth 31 of 0.3 times, causes this partial torque effectively to utilize to avoid iron core passage supersaturation.
Preferably, magnet steel groove structure 11 comprises multilayer magnet steel groove, is provided with permanent magnet 12 in each magnet steel groove, has gap between the outer of permanent magnet 12 and the interior edge of corresponding magnet steel groove, and the span in gap is 0.1mm to 0.3mm.
In the present embodiment, the multilayer magnet steel groove that magnet steel groove structure 11 comprises is arranged along rotor core 10 spaced radial.The number of plies of the magnet steel groove that magnet steel groove structure 11 comprises can specifically be selected according to demand.
In the present embodiment, auxiliary tank 20 is air groove.
This motor is permagnetic synchronous motor.This motor is single direction rotation motor, such as compressor electric motor particularly.Motor comprises motor stator and is placed in the rotor of motor stator inside.Motor stator comprises by stator tooth 31, stator yoke and the winding that is embedded in stator slot.Rotor is by arc-shaped permanent magnet, form for installing the magnet steel groove structure 11 of arc-shaped permanent magnet, auxiliary tank 20 and rotor shaft hatch.
Magnet steel groove structure 11 is radially two-layer or sandwich construction; Permanent magnet 12 embeds in the magnet steel groove of magnet steel groove structure 11 correspondingly, and ensures the gap of each limit 0.1 ~ 0.3mm; Two-layer or multilayer magnet steel radially on a direction forms a pole; Two adjacent magnet steel of circumference form a pair magnetic pole.
One deck groove of every pole magnet steel groove structure 11 near the outer of rotor core 10 is with there is auxiliary tank 20 between rotor outer and the position of auxiliary tank 20 is not arranged symmetrically with relative to the center line of the magnetic pole of its correspondence; It is arranged in the Hou Yanchu of rotor direction of rotation.In the present embodiment, the direction of rotation of rotor is counterclockwise.
Auxiliary tank 20 is engraved structure, is air in groove.
Form an iron core passage between upper strata groove 21 and lower floor's groove 22, the thickness W3 > 0.3 × W4 of iron core passage, causes this partial torque effectively to utilize to avoid its supersaturation.
The two ends angle a of iron core passage, a=(1.5 ~ 1.8) × 360/Z; Wherein Z represents the total number of teeth of stator; If desirable 15 ° ~ 18 ° of Z=36, a; Wherein, during a=(1.5 ~ 1.8) × 360/Z, the reluctance torque that auxiliary tank 20 can be made to produce is in higher level; During a<1.5 × 360/Z, the distance between center line of two teeth that iron core passage two ends are corresponding is respectively greater than the distance at iron core passage two ends too much, does not produce reluctance torque; During a>1.8 × 360/Z, the distance that the distance between center line of two teeth that iron core passage two ends are corresponding is respectively greater than iron core passage two ends is very few, and reluctance torque effect declines, and effect weakens;
Auxiliary tank 20 should be placed in angular regions δ max, and wherein angular regions δ max wherein angle limit is defined as the center line of two consecutive roots; Another limit is the angle line of auxiliary tank 20 near the forward position of its corresponding magnetic pole; Wherein δ max=θ+(1.5 ~ 1.8) * 360/Z=θ+a; Wherein, when δ max is greater than this value, auxiliary tank 20 can take the d axle magnetic linkage that permanent magnet produces, and reduces permanent-magnet torque, has run counter to Design assistant groove and played a role in improving, do not affected the original idea of former overall magnetic circuit; When δ max is less than this value, the shared region of its auxiliary tank is less than the amplitude position of composite magnetic power (in Fig. 2 F), and auxiliary tank design can not play its useful effect.
From above description, can find out, the utility model the above embodiments achieve following technique effect: between the magnet steel groove in each pole of rotor core and surface, rotor core outer, and be positioned at rotor direction of rotation rear increase along place individual layer, bilayer or or multilayer auxiliary tank, winding weak magnetic component Central Plains is utilized, to produce torque and export in process through the part magnetic linkage of iron core short circuit in the auxiliary tank by described design; And by rational Position Design, to reach the effect in " peak clipping Pinggu ", to improve torque pulsation.
By the design of auxiliary tank, the reluctance torque utilizing auxiliary tank to produce is synthesized with former torque, increase the trough value of former torque, reduce the peak value of former torque profile, reduce its torque pulsation coefficient, because auxiliary tank produces the utilization of reluctance torque, by rational design, its torque can be increased export, lifting motor performance.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a motor, comprises rotor, it is characterized in that, described rotor comprises:
Rotor core (10), described rotor core (10) is provided with magnet steel groove structure (11), be provided with permanent magnet (12) in described magnet steel groove structure (11), described magnet steel groove structure (11) is circular arc;
Auxiliary tank (20), described auxiliary tank (20) is positioned between described magnet steel groove structure (11) and described rotor core (10) outer, and described auxiliary tank (20) and described magnet steel groove structure (11) are arranged correspondingly, described auxiliary tank (20) is circular arc, the bearing of trend of described auxiliary tank (20) is identical with the bearing of trend of described magnet steel groove structure (11), and described auxiliary tank (20) and described magnet steel groove structure (11) are protruding in the same way.
2. motor according to claim 1, is characterized in that, described auxiliary tank (20) is double-deck, and arranges along the spaced radial of described rotor core (10), forms iron core passage between two-layer described auxiliary tank (20).
3. motor according to claim 1, it is characterized in that, the outer of described rotor core (10) has arc-shaped concave, described arc-shaped concave and described auxiliary tank (20) are arranged correspondingly, and described arc-shaped concave is concentric with described auxiliary tank (20), between described arc-shaped concave and described auxiliary tank (20), form iron core passage.
4. the motor according to Claims 2 or 3, is characterized in that, the two ends angularly a of the iron core passage of described auxiliary tank (20), and described angle a determines according to formula 1,
A=(1.5 ~ 1.8) × 360/Z formula 1
Wherein, Z is the stator number of teeth.
5. motor according to claim 4, is characterized in that, described auxiliary tank (20) is arranged in angular regions δ max, and angular regions δ max determines according to formula 2,
δ max=θ+a formula 2
Wherein, θ is weak magnetic deviation, and θ determines according to the difference in inductance of the d axle of motor and motor q axle, and a limit of δ max is the center line of adjacent two magnetic poles.
6. motor according to claim 2, it is characterized in that, one deck of close described rotor core (10) outer of described auxiliary tank (20) is upper strata groove (21), one deck away from described rotor core (10) outer of described auxiliary tank (20) is lower floor's groove (22), minor distance of W 1 between described upper strata groove (21) and described rotor core (10) outer is 0.3mm to 0.4mm, and the minor distance of W 2 between described lower floor groove (22) and described rotor core (10) outer is 0.4mm to 0.6mm.
7. motor according to claim 6, is characterized in that, described motor also comprises stator, and described stator comprises:
Stator core;
Stator tooth (31), described stator tooth (31) is arranged around the circumferential uniform intervals of described stator core, and extends along the radial direction of described stator core.
8. motor according to claim 7, it is characterized in that, form iron core passage between described upper strata groove (21) and described lower floor groove (22), the thickness W3 of described iron core passage is greater than the width W 4 of the stator tooth (31) of 0.3 times.
9. motor according to claim 1, it is characterized in that, described magnet steel groove structure (11) comprises at least one deck magnet steel groove, described permanent magnet (12) is provided with in each magnet steel groove, have gap between the outer of described permanent magnet (12) and the interior edge of corresponding described magnet steel groove, the span in described gap is 0.1mm to 0.3mm.
10. motor according to claim 1, is characterized in that, described auxiliary tank (20) is air groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721849.3U CN204244048U (en) | 2014-11-25 | 2014-11-25 | Motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721849.3U CN204244048U (en) | 2014-11-25 | 2014-11-25 | Motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204244048U true CN204244048U (en) | 2015-04-01 |
Family
ID=52773490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420721849.3U Withdrawn - After Issue CN204244048U (en) | 2014-11-25 | 2014-11-25 | Motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204244048U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600947A (en) * | 2014-11-25 | 2015-05-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Electric motor |
| CN112470365A (en) * | 2018-06-07 | 2021-03-09 | 马威动力控制技术有限公司 | Rotor for an electric machine and electric machine comprising said rotor |
-
2014
- 2014-11-25 CN CN201420721849.3U patent/CN204244048U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600947A (en) * | 2014-11-25 | 2015-05-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Electric motor |
| CN104600947B (en) * | 2014-11-25 | 2016-03-02 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor |
| CN112470365A (en) * | 2018-06-07 | 2021-03-09 | 马威动力控制技术有限公司 | Rotor for an electric machine and electric machine comprising said rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150401 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |