CN102769367A - Permanent magnet assisted synchronous reluctance motor and installation method thereof - Google Patents

Permanent magnet assisted synchronous reluctance motor and installation method thereof Download PDF

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Publication number
CN102769367A
CN102769367A CN2012100562601A CN201210056260A CN102769367A CN 102769367 A CN102769367 A CN 102769367A CN 2012100562601 A CN2012100562601 A CN 2012100562601A CN 201210056260 A CN201210056260 A CN 201210056260A CN 102769367 A CN102769367 A CN 102769367A
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permanent magnet
rotor
stator
reluctance motor
permanent
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CN2012100562601A
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CN102769367B (en
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黄辉
胡余生
陈东锁
曾学英
肖勇
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Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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Abstract

The invention provides a permanent magnet assisted synchronous reluctance motor and an installation method thereof. The permanent magnet assisted synchronous reluctance motor comprises a rotor and a stator. The rotor comprises a rotor core and a plurality of groups of magnetic pole units are arranged in the rotor core. The stator surrounds the rotor. A gap is kept between the stator and the rotor. The stator comprises a stator core which is provided with a plurality of grooves and teeth arranged in the circumferential direction, and windings which are arranged in the grooves. Each group of magnetic pole unit comprises a plurality of layers of permanent magnet grooves which are arranged in the radial direction, and permanent magnets which are arranged in the permanent magnet grooves. The axial length of the rotor is larger than the axial length of the stator. The permanent magnet assisted synchronous reluctance motor and the installation method thereof mainly have the advantages that since layers of permanent magnet grooves and layers of permanent magnets are arranged, on the basis that permanent magnet linkage is fully used by the motor, the reluctance torque producing capability of the motor is greatly improved and the goal of keeping the efficiency of the motor using ferrite permanent magnets to be high is realized.

Description

The installation method of permanent magnetism assist in synchronization reluctance motor and motor
Technical field
The present invention relates to machine field, the installation method of particularly a kind of permanent magnetism assist in synchronization reluctance motor and motor.
Background technology
Fig. 1 shows the profile of the internal permanent magnet synchronous motor of prior art, and this motor comprises rotor 2 and is positioned at rotor 2 outsides and has the stator 3 of certain interval g with rotor 2.Stator 3 wherein is by the stator core 31 that is provided with a plurality of grooves 32 and tooth 33 at circumferencial direction and place the winding (not shown) of groove 32 to constitute; Its rotor 2 is provided with the rotor core 21 of many group magnetic pole units and is placed the permanent magnet 4 of the permanent magnet trough 5 of iron core to form by interior.Adopt high permanent magnetic material such as the rare-earth permanent magnet of magnetic property among Fig. 1 a wherein.Adopt more weak permanent magnetic material such as the ferrite of magnetic property among Fig. 1 b.
The internal permanent magnet synchronous motor of prior art, mainly through adopting the high magnetic characteristics permanent magnet to improve motor performance, common way is exactly built-in rare-earth permanent magnet for it.But because rare earth is non-renewable resources, and be the state key strategic materials, it costs an arm and a leg, and has limited and has adopted the motor of rare-earth permanent magnet to use widely.
Also there is the permanent magnet that adopts magnetic property more weak relatively (like ferrite etc.) to replace rare-earth permanent magnet to process built-in permagnetic synchronous motor in the prior art; And adopt rotor height to improve efficiency of motor greater than the mode of stator height; But because d, the q axle magnetic resistance difference of motor itself are little; Motor produces the limited in one's ability of reluctance torque, therefore makes to adopt above-mentioned rotor height also can't satisfy the demand of motor high efficiency greater than the method for stator height.
Summary of the invention
The present invention provides the installation method of a kind of permanent magnetism assist in synchronization reluctance motor and motor, overcomes the high and not high problem of non-rare-earth permanent magnet electric efficiency of motor cost of available technology adopting rare-earth permanent magnet.
The present invention realizes through following technical scheme: a kind of permanent magnetism assist in synchronization reluctance motor comprises: rotor, comprise rotor core, and many group magnetic pole units are set in the rotor core; Stator, surrounding rotor also and between the rotor has the gap, is included in stator core and the winding that places groove that circumferencial direction is provided with a plurality of grooves and tooth; Every group of magnetic pole unit comprises the permanent magnet trough and the permanent magnet that places permanent magnet trough of multilayer radial arrangement, and the axial length of rotor is greater than the axial length of stator.
Further, permanent magnet trough is two-layer, is respectively internal layer permanent magnet trough and outer permanent magnet trough, and permanent magnet is respectively internal layer permanent magnet and outer permanent magnet.
Further, the end of permanent magnet and permanent magnet trough the end inwall between have spacing, distance is not less than 1.5 times of shortest spacing between permanent magnet trough end and the rotor diameter.
Further, the spacing between internal layer permanent magnet and the outer permanent magnet is greater than 1/12 of the tooth boots width of the tooth of stator.
Further, rotor height and stator aspect ratio are less than or equal to 1.4.
Further, the external diameter of rotor is greater than or equal to 0.55 with the external diameter ratio of stator.
Further, the external diameter of rotor compares for being less than or equal to 0.65 with the external diameter of stator.
Further, the gap width between rotor and the stator is greater than or equal to 0.3mm, and is less than or equal to 0.45mm.
Further, permanent magnet trough is arbitrary cross sectional shape in arc, U-shaped, V-arrangement or the multistage rectangle.
Further, the permanent magnet number of plies is less than the permanent magnet trough number of plies.
Further, the permanent magnet trough in the rotor core is that three sections rectangles connections combine, and the magnet that it is rectangle that internal layer permanent magnet and outer permanent magnet are a cross section places the middle part with layer permanent magnet trough.
Further, the permanent magnet trough in the rotor core is that three sections rectangles connections combine, and the magnet that it is rectangle that internal layer permanent magnet and outer permanent magnet are divided into two cross sections places the both ends with layer permanent magnet trough respectively.
Further, the permanent magnet trough in the rotor core is an arc, and the magnet that it is arc that internal layer permanent magnet and outer permanent magnet are a cross section places the middle part with layer permanent magnet trough.
Further; Internal layer permanent magnet trough in the rotor core is that three sections rectangles connections combine; Outer permanent magnet trough is an arc, and the internal layer permanent magnet is a magnet that the cross section is a rectangle, the middle part of permanent magnet trough in placing; Outer permanent magnet is a magnet that the cross section is an arc, places the middle part of outer permanent magnet trough.
According to a further aspect in the invention, a kind of installation method of permanent magnetism assist in synchronization reluctance motor is provided, may further comprise the steps:
Step 1 is inserted the permanent magnet trough in the rotor core with permanent magnet, makes the axial length of the axial length of rotor greater than said stator;
Step 2 is used the baffle plate capping with the rotor core two ends, thereby permanent magnet is fixed in the permanent magnet trough;
Step 3, the rotor core that capping is good is positioned in the stator, and has covered motor housing.
Pass through technique scheme; Major advantage of the present invention is: multilayer permanent magnet trough and multi-layer magnet are set; Make motor on the basis that makes full use of the permanent magnetism magnetic linkage, the ability that motor produces reluctance torque also improves greatly, has realized adopting the purpose of the motor high efficiency of ferrite permanent magnet.
Description of drawings
The accompanying drawing that constitutes a part of the present invention is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 a shows the profile of rare earth permanent-magnet synchronization motor of the prior art;
Fig. 1 b shows the profile of non-rare earth permanent-magnet synchronization motor of the prior art;
Fig. 2 shows the profile of permanent magnetism assist in synchronization reluctance motor of the present invention;
Fig. 3 shows the rotor height of permanent magnetism assist in synchronization reluctance motor of the present invention and the sketch map of stator height;
Fig. 4 shows rotor and the stator height ratio of permanent magnetism assist in synchronization reluctance motor of the present invention chart to inductive impact;
Fig. 5 shows the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention and the chart that stator outer diameter ratio influences electromagnetic parameter;
Fig. 6 shows the chart of the motor gas-gap width of permanent magnetism assist in synchronization reluctance motor of the present invention to inductive impact;
Fig. 7 shows permanent magnet end distance in the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention with the spacing sketch map of layer permanent magnet trough end;
Fig. 8 shows permanent magnet end distance in the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention with the spacing ratio of the layer permanent magnet trough end chart to the demagnetization current influence;
Fig. 9 a shows the profile of first embodiment of the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention;
Fig. 9 b shows the profile of second embodiment of the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention;
Fig. 9 c shows the profile of the 3rd embodiment of the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention;
Fig. 9 d shows the profile of the 4th embodiment of the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention;
Figure 10 a shows the part sectioned view of the rotor core of permanent magnetism assist in synchronization reluctance motor of the present invention; And
Figure 10 b shows the part sectioned view of the rotor of permanent magnetism assist in synchronization reluctance motor of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
The profile of permanent magnetism assist in synchronization reluctance motor of the present invention has been shown among Fig. 2, and this motor comprises rotor 2 and is positioned at rotor 2 outsides and has the stator 3 of certain interval g with rotor 2.Stator 3 wherein is included in the stator core 31 and the winding (not shown) that places groove 32 that circumferencial direction is provided with a plurality of grooves 32 and a plurality of teeth 33.Wherein, The rotor core 21 that is provided with many group magnetic pole units in rotor 2 comprises is formed; All magnetic pole units are arranged in the form that the N utmost point and the S utmost point replace in the rotor circumference direction; Each magnetic pole unit comprises two-layer permanent magnet trough 5 and the permanent magnet that places in the permanent magnet trough, and the radial direction of two-layer permanent magnet trough 5 relative rotor centers is respectively internal layer permanent magnet trough and outer permanent magnet trough from inside to outside, and correspondingly permanent magnet is divided into internal layer permanent magnet 42 and outer permanent magnet 41.
In order to improve the anti-demagnetization capability of motor, the end 421,422,411,412 of inside and outside permanent magnet keeps certain distance respectively and with 51,52 of layer permanent magnet trough ends.In addition; For increasing d, the q axle difference in inductance of motor; Improve the ability that motor produces reluctance torque, need be in certain scope with the design of ectonexine permanent magnet spacing, for every extremely every phase groove number less than 1 situation; This spacing is L greater than the tooth boots width w of 1/12 stator tooth 33, and that optimum is w/12≤L≤w/3.
Fig. 3 is the sketch map of rotor height and external diameter, and D2 is rotor 2 external diameters, and D3 is stator 3 external diameters, and h2 is rotor 2 height, and h3 is stator 3 height.To the influence of motor electromagnetic parameter, much more more it having verified through increasing the ratio of rotor height and stator height, except utilizing the permanent-magnet torque of motor, can also increase the reluctance torque of motor when Fig. 4 showed the rotor height greater than the stator height.From figure, can find out; Along with the increase of rotor height, permanent magnetism magnetic linkage and motor q axle inductance increase to some extent, but the d axle inductance of motor remains unchanged basically; When increasing to stator height ratio, rotor height reaches 1.3 when above; Q axle inductance and magnetic linkage all increase very slow, and when this ratio met or exceeded 1.4, q axle inductance and magnetic linkage were constant basically.So preferably, said rotor 2 height are less than or equal to 1.4 with said stator 3 aspect ratios.
Fig. 5 shows the influence of rotor external diameter and stator outer diameter comparison motor inductance parameters among Fig. 2; Can know that from figure keeping under the constant situation of motor stator external diameter, the rotor diameter that increases motor can increase d, the q axle difference in inductance of motor; Improve the ability that motor produces reluctance torque; Consider technological feasibility, rotor external diameter and stator outer diameter for being greater than or equal to 0.55, and are less than or equal to 0.65 than best.
Aspect the motor gas-gap width, it is favourable to improving the motor permanent-magnet torque to reduce the motor gas-gap width, and this also sets up for the internal permanent magnet synchronous motor of prior art.But for permanent magnetism assist type synchronous magnetic resistance motor of the present invention; Reduce the motor gas-gap width except increasing the motor permanent-magnet torque; Can also improve the reluctance torque of motor effectively; Thereby promote efficiency of motor further, this internal permanent magnet synchronous motor with the low magnetic property ferrite permanent magnet of available technology adopting is compared, and performance advantage is more obvious.
The influence of the width of air gap of motor to inductance parameters has been shown among Fig. 6, from figure, can have found out, under the situation that the motor gas-gap width reduces gradually; The d axle inductance of motor slightly descends, but the increase of q axle inductance increases sharply, and particularly is reduced to 0.5mm when following when width of air gap; The increase of q axle inductance is more obvious, and this is highly beneficial to improving the motor reluctance torque, however; Consider that motor under the small air gap width makes the difficulty with assembly technology, the width of air gap of common motor is not less than 0.3mm.
Fig. 7 is the partial view of the rotor of the permanent magnetism assist in synchronization reluctance motor among Fig. 2, Fig. 8 be the permanent magnetism assist in synchronization reluctance motor among Fig. 2 the permanent magnet end and with the layer permanent magnet trough the end inwall between apart from the beeline t between δ and permanent magnet trough end and the rotor outer rim wRatio and the relation between the motor inductance parameters, from figure, can find out, suitably increase the demagnetization current that δ can improve motor, and δ increases to and t wRatio greater than 1.5 o'clock, it is less that demagnetization current promotes, and considers every utmost point air-gap flux size in addition, it is too big that δ is inappropriate for increase.So, preferably, having spacing between the end inwall of the end of said permanent magnet and said permanent magnet trough 5, said distance is not less than 1.5 times of shortest spacing between the external diameter of end and said rotor 2 of said permanent magnet trough 5.
Fig. 9 is the profile of other embodiment rotors of motor among Fig. 2.The permanent magnet trough 5 that Fig. 9 a shows in the iron core 21 is that three sections rectangles connections combine, and internal layer permanent magnet 42 is a magnet that the cross section is a rectangle with outer permanent magnet 41, places the middle part of permanent magnet trough.It is that three sections rectangles connect and combine that Fig. 9 b shows permanent magnet trough 5 in the iron core 21, and the magnet that it is rectangle that internal layer permanent magnet 42 and outer permanent magnet 41 are divided into two cross sections places the both ends of permanent magnet trough respectively.The permanent magnet trough 5 that Fig. 9 c shows in the iron core 21 is arc, and the magnet that it is arc that internal layer permanent magnet 42 and outer permanent magnet 41 are a cross section places the middle part of permanent magnet trough.The interior permanent magnet trough that Fig. 9 d shows in the iron core 21 is that three sections rectangles connections combine; Outer permanent magnet trough is an arc; Internal layer permanent magnet 42 is two magnets that the cross section is a rectangle; The both ends of permanent magnet trough in placing respectively, outer permanent magnet 41 is a magnet that the cross section is an arc, places the middle part of outer permanent magnet trough.But as the selection scheme of arranging, the number of plies of permanent magnet can be the same with permanent magnet trough, also can be less than the number of plies of permanent magnet trough, and the shape of each layer permanent magnet is also not necessarily with consistent with the shape of layer permanent magnet trough.
Figure 10 is for adopting dust core and laminating Fig. 2 rotor iron core profile and the rotor profiles figure that the silicon steel sheet plate combines and makes.Wherein Figure 10 a is for adopting the integrated rotor core 21 of dust core, and it comprises axis hole R, at a distance between the magnetic region 7 and the hole 6 that is used to place bracing piece.Fig. 8 b is for adopting the rotor profile of the present invention's technology; Wherein placing inside and outside permanent magnet 41 and 42 and adopt the magnetic conduction passage 8 between the inside and outside permanent magnetism that high permeability and high magnetic flux density process at a distance between the magnetic region in 7 simultaneously, the both ends of permanent magnet 41 and 42 with filled non-magnet material (like resin etc.) at a distance from the gap portion at 7 both ends between the magnetic region and be used to prevent permanent magnet 7 generation relative motions between separated magnetic region; On the other hand; For preventing that in motor operation course the centrifugal force of ectonexine permanent magnet causes situation such as the rotor outer rim deforms, and in hole 6, has placed the bracing piece (not shown); Lower baffle plate constitutes one to strengthen the mechanical strength of rotor on itself and the rotor, guarantees the reliability of motor rotation.
The installation method of a kind of permanent magnetism assist in synchronization reluctance motor provided by the invention may further comprise the steps:
Step 1 is inserted the permanent magnet trough 5 in the rotor core 21 with permanent magnet, makes the axial length of the axial length of rotor 2 greater than said stator 3;
Step 2 is used the baffle plate capping with rotor core 21 two ends, thereby permanent magnet is fixed in the permanent magnet trough 5;
Step 3, the rotor core 21 that capping is good is positioned in the stator 3, and has covered motor housing.
According to permanent magnetism assist in synchronization reluctance motor of the present invention, have following beneficial effect:
Among the present invention through the rotor height is designed to greater than the stator height; And on rotor, adopt special structural design; Make motor on the basis that makes full use of the permanent magnetism magnetic linkage; The ability that motor produces reluctance torque also improves greatly, has realized adopting the purpose of the motor high efficiency of ferrite permanent magnet.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (14)

1. permanent magnetism assist in synchronization reluctance motor comprises:
Rotor (2) comprises rotor core (21), and many group magnetic pole units are set in the said rotor core (21);
Stator (3), around said rotor (2) and and said rotor (2) between have the gap, be included in the winding that circumferencial direction is provided with the stator core (31) of a plurality of grooves (32) and tooth (33) and places said groove (32);
It is characterized in that every group of said magnetic pole unit comprises the permanent magnet trough (5) of multilayer radial arrangement and place the permanent magnet of said permanent magnet trough; The axial length of said rotor (2) is greater than the axial length of said stator (3).
2. permanent magnetism assist in synchronization reluctance motor according to claim 1 is characterized in that said permanent magnet trough (5) is two-layer, is respectively internal layer permanent magnet trough and outer permanent magnet trough, and said permanent magnet is respectively internal layer permanent magnet (42) and outer permanent magnet (41).
3. permanent magnetism assist in synchronization reluctance motor according to claim 1; It is characterized in that; Have spacing between the end inwall of the end of said permanent magnet and said permanent magnet trough (5), said distance is not less than 1.5 times of shortest spacing between the external diameter of end and said rotor (2) of said permanent magnet trough (5).
4. permanent magnetism assist in synchronization reluctance motor according to claim 2 is characterized in that, the spacing between said internal layer permanent magnet (42) and the said outer permanent magnet (41) is greater than 1/12 of the tooth boots width of the said tooth (33) of said stator (3).
5. permanent magnetism assist in synchronization reluctance motor according to claim 1 is characterized in that, said rotor (2) height is less than or equal to 1.4 with said stator (3) aspect ratio.
6. permanent magnetism assist in synchronization reluctance motor according to claim 1 is characterized in that, the external diameter ratio of the external diameter of said rotor (2) and said stator (3) is greater than or equal to 0.55.
7. permanent magnetism assist in synchronization reluctance motor according to claim 6 is characterized in that, the external diameter ratio of the external diameter of said rotor (2) and said stator (3) is less than or equal to 0.65.
8. permanent magnetism assist in synchronization reluctance motor according to claim 1 is characterized in that, the gap width between said rotor (2) and the said stator (3) is greater than or equal to 0.3mm, and is less than or equal to 0.5mm.
9. permanent magnetism assist in synchronization reluctance motor according to claim 1 is characterized in that, said permanent magnet trough (5) is arbitrary cross sectional shape in arc, U-shaped, V-arrangement and the multistage rectangle.
10. permanent magnetism assist in synchronization reluctance motor according to claim 2; It is characterized in that; Said permanent magnet trough (5) in the said rotor core (21) is that three sections rectangles connections combine; The magnet that it is rectangle that said internal layer permanent magnet (42) and said outer permanent magnet (41) are a cross section places the middle part with the said permanent magnet trough of layer (5).
11. permanent magnetism assist in synchronization reluctance motor according to claim 2; It is characterized in that; Said permanent magnet trough (5) in the said rotor core (21) is that three sections rectangles connections combine; The magnet that it is rectangle that said internal layer permanent magnet (42) and said outer permanent magnet (41) are divided into two cross sections places the both ends with the said permanent magnet trough of layer (5) respectively.
12. permanent magnetism assist in synchronization reluctance motor according to claim 2; It is characterized in that; Said permanent magnet trough (5) in the said rotor core (21) is an arc; The magnet that it is arc that said internal layer permanent magnet (42) and said outer permanent magnet (41) are a cross section places the middle part with the said permanent magnet trough of layer (5).
13. permanent magnetism assist in synchronization reluctance motor according to claim 2; It is characterized in that the said internal layer permanent magnet trough in the said rotor core (21) is that three sections rectangles connections combine, said outer permanent magnet trough is an arc; Said internal layer permanent magnet (42) is a magnet that the cross section is a rectangle; Place the middle part of said interior permanent magnet trough, said outer permanent magnet (41) is a magnet that the cross section is an arc, places the middle part of said outer permanent magnet trough.
14. the installation method of a permanent magnetism assist in synchronization reluctance motor is characterized in that, may further comprise the steps:
Step 1 is inserted the permanent magnet trough (5) in the rotor core (21) with permanent magnet, makes the axial length of the axial length of rotor (2) greater than said stator (3);
Step 2 is used the baffle plate capping with rotor core (21) two ends, thereby permanent magnet is fixed in the permanent magnet trough (5);
Step 3, the rotor core that capping is good (21) is positioned in the stator (3), and has covered motor housing.
CN 201210056260 2012-03-05 2012-03-05 Permanent magnet assisted synchronous reluctance motor and installation method thereof Active CN102769367B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104600937A (en) * 2013-12-24 2015-05-06 珠海格力节能环保制冷技术研究中心有限公司 Synchronous reluctance motor
CN105048670A (en) * 2015-08-14 2015-11-11 柳州佳力电机股份有限公司 High-power permanent magnet synchronous motor rotor
CN107659101A (en) * 2017-09-29 2018-02-02 珠海格力节能环保制冷技术研究中心有限公司 Reluctance type Consequent pole permanent magnet motor
WO2019174313A1 (en) * 2018-03-16 2019-09-19 珠海格力电器股份有限公司 Rotor structure, permanent magnet-assisted synchronous reluctance motor, and electric vehicle
CN110601399A (en) * 2019-09-12 2019-12-20 广东上水能源科技有限公司 Space permanent magnet motor

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CN202142925U (en) * 2011-08-05 2012-02-08 珠海格力电器股份有限公司 Rotor of motor and motor comprising same
CN202444392U (en) * 2012-03-05 2012-09-19 珠海格力节能环保制冷技术研究中心有限公司 Permanent magnet auxiliary synchronous reluctance motor

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CN1505239A (en) * 1995-05-31 2004-06-16 ���µ�����ҵ��ʽ���� Motor with built-in permanent magnets
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CN202142925U (en) * 2011-08-05 2012-02-08 珠海格力电器股份有限公司 Rotor of motor and motor comprising same
CN202444392U (en) * 2012-03-05 2012-09-19 珠海格力节能环保制冷技术研究中心有限公司 Permanent magnet auxiliary synchronous reluctance motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104600937A (en) * 2013-12-24 2015-05-06 珠海格力节能环保制冷技术研究中心有限公司 Synchronous reluctance motor
CN104600937B (en) * 2013-12-24 2016-03-09 珠海格力节能环保制冷技术研究中心有限公司 Synchronous magnetic resistance motor
CN105048670A (en) * 2015-08-14 2015-11-11 柳州佳力电机股份有限公司 High-power permanent magnet synchronous motor rotor
CN107659101A (en) * 2017-09-29 2018-02-02 珠海格力节能环保制冷技术研究中心有限公司 Reluctance type Consequent pole permanent magnet motor
WO2019174313A1 (en) * 2018-03-16 2019-09-19 珠海格力电器股份有限公司 Rotor structure, permanent magnet-assisted synchronous reluctance motor, and electric vehicle
CN110601399A (en) * 2019-09-12 2019-12-20 广东上水能源科技有限公司 Space permanent magnet motor

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