CN204145239U - Permagnetic synchronous motor and rotor assembly thereof - Google Patents

Permagnetic synchronous motor and rotor assembly thereof Download PDF

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Publication number
CN204145239U
CN204145239U CN201420536392.9U CN201420536392U CN204145239U CN 204145239 U CN204145239 U CN 204145239U CN 201420536392 U CN201420536392 U CN 201420536392U CN 204145239 U CN204145239 U CN 204145239U
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China
Prior art keywords
rotor
synchronous motor
permagnetic synchronous
groove
rotor core
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CN201420536392.9U
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Chinese (zh)
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胡健华
陈正胜
张尊睦
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Anhui Meizhi Precision Manufacturing Co Ltd
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Anhui Meizhi Precision Manufacturing Co Ltd
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Abstract

The utility model discloses a kind of permagnetic synchronous motor and rotor assembly thereof, described rotor assembly comprises: rotor core and multiple rotor magnet part, rotor core is formed with many group rotors groove, many group rotors groove is spaced apart distribution in the circumference of rotor core, every group rotor groove comprises at least one rotor, be provided with hole, at least two gaps between the rotor that wherein periphery wall of every group rotor groove middle distance rotor core is nearest and the periphery wall of rotor core, hole, at least two gaps is about the radial symmetric of rotor core; Multiple rotor magnet part is located in many group rotors groove respectively.According to the rotor assembly of permagnetic synchronous motor of the present utility model, by arranging hole, at least two gaps, the structure of rotor assembly is simple.When rotor assembly is applied on permagnetic synchronous motor, obviously can improve the cogging torque of permagnetic synchronous motor, weaken the harmonic content in air gap flux density and back electromotive force in permagnetic synchronous motor, reduce vibration and the noise of permagnetic synchronous motor.

Description

Permagnetic synchronous motor and rotor assembly thereof
Technical field
The utility model relates to art of refrigeration units, especially relates to a kind of permagnetic synchronous motor and rotor assembly thereof.
Background technology
Point out in correlation technique, in the motor that high magnetic conductive material is made, the cogging torque that the geometrical locations relation because of stator and rotor produces is comparatively large, vibrates larger.In addition, the voltage responded in stator winding, forms the distorted waveform containing a lot of high order harmonic component, causes, outside noise increase, also causing efficiency to reduce because iron loss increases.And when driving the interchange of stator supply three phase sine, be only fundametal compoment due to what play useful effect as torque, high fdrequency component forms torque ripple, makes vibration and noise increase due to this torque ripple.
Utility model content
The utility model is intended at least to solve one of technical problem existed in prior art.For this reason, an object of the present utility model is to propose a kind of rotor assembly for permagnetic synchronous motor, and the structure of rotor assembly is simple.
Another object of the present utility model is to propose a kind of permagnetic synchronous motor with above-mentioned rotor assembly.
According to the rotor assembly of the permagnetic synchronous motor of the utility model first aspect, comprise: rotor core, described rotor core is formed with many group rotors groove, described many group rotors groove is spaced apart distribution in the circumference of described rotor core, often organize described rotor and comprise at least one rotor, wherein often organize between the nearest described rotor of the periphery wall of rotor core described in described rotor middle distance and the periphery wall of described rotor core and be provided with hole, at least two gaps, hole, described at least two gaps is about the radial symmetric of described rotor core; And multiple rotor magnet part, described multiple rotor magnet part is located in described many group rotors groove respectively.
According to the rotor assembly of permagnetic synchronous motor of the present utility model, by arranging hole, at least two gaps, the structure of rotor assembly is simple.When rotor assembly is applied on permagnetic synchronous motor, obviously can improve the cogging torque of permagnetic synchronous motor, weaken the harmonic content in air gap flux density and back electromotive force in permagnetic synchronous motor, reduce vibration and the noise of permagnetic synchronous motor.
Particularly, each described rotor comprises the first groove section and two the second groove sections that communicate with each other, described two the second groove sections are connected to the two ends of described first groove section, and the free end of each described second groove section all extends towards the direction of the periphery wall of described rotor core.
Alternatively, the angle between each described second groove section and corresponding described first groove section is obtuse angle.
Further, hole, described gap is two, and the contiguous described second groove section in the one end in hole, each described gap arranges with the junction of the first corresponding groove section and the other end extends towards the direction of the periphery wall of described rotor core.
Preferably, the angle theta between hole, each described gap and the described first groove section of corresponding described rotor 1equal the angle theta between hole, described gap and the described second groove section of corresponding described rotor 2.
Alternatively, a described rotor magnet part is respectively equipped with in described first groove section and described two the second groove sections.
Alternatively, the width in hole, each described gap is 0.5mm ~ 1.5mm.
Alternatively, each described rotor is about the radial symmetric of described rotor core.
Alternatively, the multiple described rotor of spaced apart distribution in radial direction that described rotor is included in described rotor core is often organized.
According to the permagnetic synchronous motor of the utility model second aspect, comprising: the rotor assembly of stator and the permagnetic synchronous motor according to the above-mentioned first aspect of the utility model, wherein said rotor assembly is located at the inner side of described stator.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the profile of the rotor assembly of permagnetic synchronous motor according to the utility model embodiment;
Fig. 2 adopts the permagnetic synchronous motor of rotor assembly of the utility model embodiment and the cogging torque of traditional motor with the change curve of electrical degree;
Fig. 3 is the profile of the permagnetic synchronous motor according to the utility model embodiment;
Fig. 4 is the profile of the permagnetic synchronous motor according to another embodiment of the utility model.
Reference numeral:
100: rotor assembly;
1: rotor core; 11: rotor; 12: hole, gap;
111: the first groove sections; 112: the second groove sections;
2: rotor magnet part;
200: permagnetic synchronous motor;
201: stator; 2011: stator core; 2012: stator winding; 2013: stator slot.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
Below with reference to Fig. 1-Fig. 4, the rotor assembly 100 according to the permagnetic synchronous motor 200 of the utility model embodiment is described.
As shown in Figure 1, according to the rotor assembly 100 of the permagnetic synchronous motor 200 of the utility model first aspect embodiment, comprise rotor core 1 and multiple rotor magnet part 2.
Rotor core 1 can be formed by multiple rotor punching such as steel disc is stacked.Rotor core 1 is formed with many group rotors groove 11, many group rotors groove 11 is spaced apart distribution in the circumference of rotor core 1, and that is, be spaced from each other between two often adjacent group rotor grooves 11 certain distance in the circumference of rotor core 1.Such as show four group rotor groove 11, four group rotor grooves 11 in the example of fig. 1 to be preferably uniformly distributed in the circumference of rotor core 1, the angle between two now often adjacent group rotor grooves 11 is 90 °.Be appreciated that the group number of rotor 11 can according to actual requirement specific design, the utility model does not make particular determination to this.
Multiple rotor magnet part 2 is located in many group rotors groove 11 respectively, and multiple rotor magnet part 2 is arranged to have N pole alternately and S pole at multiple rotor magnet part 2 outer circumferential side.Alternatively, each rotor magnet part 2 can adopt rare earth permanent-magnetic material such as rare-earth Nd-Fe-B to make.
Specifically, every group rotor groove 11 comprises at least one rotor 11, and in other words, every group rotor groove 11 can only include a rotor 11, also can comprise multiple rotor 11.When every group rotor groove 11 comprises multiple rotor 11, multiple rotor 11 of every group rotor groove 11 can spaced apart distribution in the radial direction of rotor core 1, as shown in Figure 1, thus, take full advantage of the feature of reluctance torque, Driving Torque and the efficiency of permagnetic synchronous motor 200 can be promoted.
Be provided with hole, at least two gaps 12 between the rotor 11 that the periphery wall of every group rotor groove 11 middle distance rotor core 1 is nearest and the periphery wall of rotor core 1, now hole, at least two gaps 12 is positioned at the side of its periphery wall of vicinity of described rotor core 1.Hole, at least two gaps 12 is about the radial symmetric of rotor core 1, and that is, hole, at least two gaps 12 is symmetrical about the straight line at the center by rotor core 1.Be understandable that, direction " outward " refers to the direction away from rotor core 1 center, and its rightabout is defined as " interior ", namely towards the direction at rotor core 1 center.
Here, it should be noted that, " hole, gap 12 " refers to long and narrow hole, and namely width differs larger hole with the size of length.Alternatively, the width in hole, each gap 12 is 0.5mm ~ 1.5mm, to ensure the efficiency of permagnetic synchronous motor 200.Wherein, hole, each gap 12 can for running through the through hole of rotor core 1, and such as, rotor core 1 is run through along the axis of rotor core 1 in hole, each gap 12.
When rotor assembly 100 is applied on permagnetic synchronous motor 200, as shown in Figure 2, curve a in figure is the change curve of cogging torque with electrical degree of the permagnetic synchronous motor 200 of the rotor assembly adopting the utility model embodiment, and curve b is the change curve of cogging torque with electrical degree of traditional motor.As can be seen from Figure 2, adopt according to the permagnetic synchronous motor 200 of the rotor assembly 100 of the utility model embodiment relative to traditional motor, cogging torque obtains obvious improvement, and cogging torque amplitude reduces more than 50%.
According to the rotor assembly 100 of the permagnetic synchronous motor 200 of the utility model embodiment, by arranging hole, at least two gaps 12, the structure of rotor assembly 100 is simple, when rotor assembly 100 is applied on permagnetic synchronous motor 200, obviously can improve the cogging torque of permagnetic synchronous motor 200, weaken the harmonic content in air gap flux density and back electromotive force in permagnetic synchronous motor 200, reduce vibration and the noise of permagnetic synchronous motor 200.
According to a specific embodiment of the present utility model, each rotor 11 comprises the first groove section 111 and two the second groove sections 112 that communicate with each other, two the second groove sections 112 are connected to the two ends of the first groove section 111, and the free end of each second groove section 112 (such as, in Fig. 1 the periphery wall of adjacent rotor iron core 1 one end) all extends towards the direction of the periphery wall of rotor core 1.Thus, by arranging the second groove section 112, the magnetic flux short circuit to each other of multiple rotor magnet part 2 can be prevented.
As shown in Figure 1, first groove section 111 extends along the circumference of rotor core 1 substantially, each second groove section 112 extends along inward-outward direction substantially, specifically, one end of each second groove section 112 (such as, the inner in Fig. 1, the i.e. one end at adjacent rotor iron core 1 center) be connected with one end of the first groove section 111, the other end of each second groove section 112 (such as, outer end in Fig. 1, namely away from the one end at rotor core 1 center) extend towards the direction of the periphery wall of rotor core 1 and to be spaced apart from each other certain distance with the periphery wall of rotor core 1.
Be respectively equipped with a rotor magnet part 2 in first groove section 111 and two the second groove sections 112, as shown in Figure 1, be provided with three the rotor magnet parts 2 be spaced apart from each other in each rotor 11, the length of rotor magnet part 2 is slightly less than the length of corresponding groove section.Wherein, each rotor magnet part 2 is formed as rectangular configuration.Each rotor 11 preferably about the radial symmetric of rotor core 1, thus, can improve the efficiency of permagnetic synchronous motor 200 further.
Further, with reference to Fig. 1, the angle between each second groove section 112 and the first corresponding groove section 111 is obtuse angle, and that is, the angle between the second groove section 112 and the first corresponding groove section 111 is greater than 90 ° and is less than 180 °.But be not limited thereto.
As shown in Figure 1, hole, gap 12 is two, and the contiguous second groove section 112 in the one end in hole, each gap 12 arranges with the junction of the first corresponding groove section 111 and the other end extends towards the direction of the periphery wall of rotor core 1, now the shape in the hole, gap 12 of two radial symmetric is roughly " eight " font.Preferably, the angle theta between hole, each gap 12 and the first groove section 111 of corresponding rotor 11 1equal the angle theta between hole, gap 12 and the second groove section 112 of corresponding rotor 11 2.Thus, the cogging torque of permagnetic synchronous motor 200 can be improved further, reduce the vibration of permagnetic synchronous motor 200.
As shown in Figure 3 and Figure 4, according to the permagnetic synchronous motor 200 of the utility model second aspect embodiment, comprising: the rotor assembly 100 of stator 201 and the permagnetic synchronous motor 200 according to the above-mentioned first aspect embodiment of the utility model.Wherein, rotor assembly 100 is located at the inner side of stator 201.
Such as in the example of Fig. 3 and Fig. 4, stator 201 is respectively six groove structures and 24 groove structures, specifically, stator 201 comprises stator core 2011 and stator winding 2012, stator core 2011 is formed with multiple stator slot 2013, stator 201 in Fig. 3 stator 201 had in six stator slots 2013, Fig. 4 has 24 stator slots 2013, and stator winding 2012 is wrapped on stator core 2011 through multiple stator slot 2013.Stator 201 is located at the outside of rotor assembly 100.Rotor assembly 100 is the rotor assembly 100 of the permagnetic synchronous motor 200 according to the above-mentioned first aspect embodiment of the utility model, does not repeat them here.Be appreciated that the concrete structure of stator 201 can according to actual requirement specific design, the present invention does not make particular determination to this.
According to the permagnetic synchronous motor 200 of the utility model embodiment, while increase reluctance torque, also the electromagnetic torque of permagnetic synchronous motor 200 is increased, improve the efficiency of permagnetic synchronous motor 200, obviously can improve the cogging torque of permagnetic synchronous motor 200, weaken the harmonic content in air gap flux density and back electromotive force in permagnetic synchronous motor 200, reduce vibration and the noise of permagnetic synchronous motor 200.
According to the permagnetic synchronous motor 200 of the utility model embodiment other form and operation be all known for those of ordinary skills, be not described in detail here.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.

Claims (10)

1. a rotor assembly for permagnetic synchronous motor, is characterized in that, comprising:
Rotor core, described rotor core is formed with many group rotors groove, described many group rotors groove is spaced apart distribution in the circumference of described rotor core, often organize described rotor and comprise at least one rotor, wherein often organize between the nearest described rotor of the periphery wall of rotor core described in described rotor middle distance and the periphery wall of described rotor core and be provided with hole, at least two gaps, hole, described at least two gaps is about the radial symmetric of described rotor core; And
Multiple rotor magnet part, described multiple rotor magnet part is located in described many group rotors groove respectively.
2. the rotor assembly of permagnetic synchronous motor according to claim 1, it is characterized in that, each described rotor comprises the first groove section and two the second groove sections that communicate with each other, described two the second groove sections are connected to the two ends of described first groove section, and the free end of each described second groove section all extends towards the direction of the periphery wall of described rotor core.
3. the rotor assembly of permagnetic synchronous motor according to claim 2, is characterized in that, the angle between each described second groove section and corresponding described first groove section is obtuse angle.
4. the rotor assembly of permagnetic synchronous motor according to claim 2, it is characterized in that, hole, described gap is two, and the contiguous described second groove section in the one end in hole, each described gap arranges with the junction of the first corresponding groove section and the other end extends towards the direction of the periphery wall of described rotor core.
5. the rotor assembly of permagnetic synchronous motor according to claim 4, is characterized in that, the angle theta between hole, each described gap and the described first groove section of corresponding described rotor 1equal the angle theta between hole, described gap and the described second groove section of corresponding described rotor 2.
6. the rotor assembly of permagnetic synchronous motor according to claim 2, is characterized in that, is respectively equipped with a described rotor magnet part in described first groove section and described two the second groove sections.
7. the rotor assembly of the permagnetic synchronous motor according to any one of claim 1-6, is characterized in that, the width in hole, each described gap is 0.5mm ~ 1.5mm.
8. the rotor assembly of permagnetic synchronous motor according to claim 1, is characterized in that, each described rotor is about the radial symmetric of described rotor core.
9. the rotor assembly of permagnetic synchronous motor according to claim 1, is characterized in that, often organizes the multiple described rotor of spaced apart distribution in radial direction that described rotor is included in described rotor core.
10. a permagnetic synchronous motor, is characterized in that, comprising:
Stator; With
The rotor assembly of the permagnetic synchronous motor according to any one of claim 1-9, wherein said rotor assembly is located at the inner side of described stator.
CN201420536392.9U 2014-09-17 2014-09-17 Permagnetic synchronous motor and rotor assembly thereof Active CN204145239U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106712425A (en) * 2017-03-09 2017-05-24 广东志高精密机械有限公司 Permanent magnet synchronous motor for compressor
CN106936284A (en) * 2015-12-29 2017-07-07 丹佛斯(天津)有限公司 Motor
CN108711968A (en) * 2018-07-13 2018-10-26 珠海格力电器股份有限公司 Rotor assembly and motor
CN110017288A (en) * 2019-05-15 2019-07-16 苏州玲珑汽车科技有限公司 Electronic water pump for automobile
WO2021022922A1 (en) * 2019-08-02 2021-02-11 珠海格力电器股份有限公司 Rotor assembly and consequent pole motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106936284A (en) * 2015-12-29 2017-07-07 丹佛斯(天津)有限公司 Motor
CN106936284B (en) * 2015-12-29 2024-04-16 丹佛斯(天津)有限公司 Electric Motor
CN106712425A (en) * 2017-03-09 2017-05-24 广东志高精密机械有限公司 Permanent magnet synchronous motor for compressor
CN108711968A (en) * 2018-07-13 2018-10-26 珠海格力电器股份有限公司 Rotor assembly and motor
CN110017288A (en) * 2019-05-15 2019-07-16 苏州玲珑汽车科技有限公司 Electronic water pump for automobile
WO2021022922A1 (en) * 2019-08-02 2021-02-11 珠海格力电器股份有限公司 Rotor assembly and consequent pole motor

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