CN106487134B - Motor rotor construction and magneto - Google Patents
Motor rotor construction and magneto Download PDFInfo
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- CN106487134B CN106487134B CN201510559553.5A CN201510559553A CN106487134B CN 106487134 B CN106487134 B CN 106487134B CN 201510559553 A CN201510559553 A CN 201510559553A CN 106487134 B CN106487134 B CN 106487134B
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Abstract
The present invention provides a kind of motor rotor construction, including rotor core, rotor core is equipped with multiple permanent magnet trough groups, multiple permanent magnet trough groups are evenly distributed on the central axis side of rotor core, the U-shaped or V-type that each permanent magnet trough group is justified in opening towards rotor core periphery, permanent magnet is set in each permanent magnet trough group, each permanent magnet trough group includes at least two sections of sequentially connected permanent magnet troughs, magnetic bridge is set between two sections of adjacent permanent magnet troughs, the both ends of permanent magnet trough group are also both provided with magnetic bridge.Further relate to a kind of magneto.The motor rotor construction and magneto of the present invention, each permanent magnet trough group includes at least two sections of sequentially connected permanent magnet troughs, magnetic bridge is set between two sections of adjacent permanent magnet troughs, the both ends of permanent magnet trough group are also both provided with magnetic bridge, since the magnetic resistance at magnetic bridge is less than the magnetic resistance of permanent magnet portion, demagnetization magnetic flux will have major part by magnetic bridge, effectively increase the anti-demagnetization capability of motor.
Description
Technical field
The present invention relates to technical field of motors more particularly to a kind of motor rotor constructions and magneto.
Background technology
The magneto of the prior art, magnetic resistance is small near the both ends of permanent magnet, and collection is easy on permanent magnet both ends
The counter magnetic field of the coil effect of middle stator, permanent magnet both ends occur seriously subtracting magnetic so that torque reduces, even more so that motor is not
It can work normally.
Invention content
In view of the present situation of the prior art, the purpose of the present invention is to provide a kind of motor rotor construction and magnetoes, often
A permanent magnet trough group includes at least two sections of sequentially connected permanent magnet troughs, and magnetic bridge is arranged between adjacent two sections of permanent magnet troughs,
The both ends of permanent magnet trough group are also both provided with magnetic bridge, since the magnetic resistance at magnetic bridge is less than the magnetic resistance of permanent magnet portion, move back
Magnetic magnetic flux will have major part by magnetic bridge, change the magnetic potential circulating direction of demagnetized field, act on the demagnetization on permanent magnet
Magnetic potential is obviously reduced, and effectively increases the anti-demagnetization capability of motor.To achieve the above object, technical scheme is as follows：
A kind of motor rotor construction, including rotor core, the rotor core are equipped with multiple permanent magnet trough groups, Duo Gesuo
The central axis side that permanent magnet trough group is evenly distributed on the rotor core is stated, each permanent magnet trough group is in opening direction
The U-shaped or V-type of the rotor core periphery circle, each permanent magnet trough group is interior to be arranged permanent magnet, each permanent magnet trough
Group includes at least two sections of sequentially connected permanent magnet troughs, is arranged magnetic bridge between adjacent two sections of permanent magnet troughs, it is described forever
The both ends of magnet slot group are also both provided with magnetic bridge.
U-shaped, the Mei Gesuo that the permanent magnet trough group is justified in opening towards rotor core periphery in one of the embodiments,
It states permanent magnet trough group to be formed by three sections of sequentially connected permanent magnet troughs, the permanent magnet trough of interlude is arcuate structure, head and the tail section
Permanent magnet trough be square structure or class square structure.
Arc-shaped permanent magnet is set in the permanent magnet trough of the interlude in one of the embodiments, the head and the tail section
Rectangular permanent magnet is respectively provided in permanent magnet trough.
The permanent magnet trough edge of the head and the tail section also sets up bevelled edge, the bevelled edge in one of the embodiments,
Positioned at the opening inner side of the permanent magnet trough group, and it is placed in the end of the permanent magnet trough group, the permanent magnet trough of the head and the tail section
Interior rectangular permanent magnet is also correspondingly arranged bevelled edge.
Vertical range of the bevelled edge top at permanent magnet trough center line rotor outer circle in one of the embodiments,
For b, the width of the magnetic bridge at the permanent magnet trough group both ends is c, wherein 1.5≤b/c≤5.
In one of the embodiments, the mis-cut angle of the bevelled edge be θ, -240/2p ° of 150 °≤θ≤180 °,
In, p is that rotor number of pole-pairs, p >=6, and p are even number.
Vertical range of the bevelled edge top at permanent magnet trough center line rotor outer circle in one of the embodiments,
For b, the width of the magnetic bridge at the permanent magnet trough group both ends is c, and the mis-cut angle of the bevelled edge is θ, wherein 1.5≤
B/c≤5, -240/2p ° of 150 °≤θ≤180 °, p are that rotor number of pole-pairs, p >=6, and p are even number.
The permanent magnet trough width of the head and the tail section is more than the permanent magnet groove width of the interlude in one of the embodiments,
Degree.
In one of the embodiments, in the same permanent magnet trough group, between adjacent two sections of permanent magnet troughs
Magnetic bridge width is a, and the width of the magnetic bridge at the permanent magnet trough group both ends is c, wherein 1≤a/c≤2.5.
The V-type that the permanent magnet trough group is justified in opening towards the rotor core periphery in one of the embodiments, often
A permanent magnet trough group is formed by two sections of sequentially connected permanent magnet troughs, two sections of permanent magnet troughs be square structure or
Class square structure is respectively provided with rectangular permanent magnet in two sections of permanent magnet troughs.
Further relate to a kind of magneto, including the motor rotor construction described in any of the above-described technical solution.
The beneficial effects of the invention are as follows：
The present invention motor rotor construction and magneto, each permanent magnet trough group include at least two sections it is sequentially connected forever
Magnetic bridge is arranged between adjacent two sections of permanent magnet troughs in magnet slot, and the both ends of permanent magnet trough group are also both provided with magnetic bridge, by
Magnetic resistance at magnetic bridge is less than the magnetic resistance of permanent magnet portion, and demagnetization magnetic flux will have major part by magnetic bridge, and change demagnetization
The magnetic potential circulating direction in magnetic field, the demagnetization magnetic potential acted on permanent magnet are obviously reduced, and effectively increase the anti-demagnetization energy of motor
Power.
Description of the drawings
Fig. 1 is the structural schematic diagram of the motor rotor construction embodiment one of the present invention；
Fig. 2 is motor rotor construction schematic diagram shown in Fig. 1 with size marking；
Fig. 3 is the structural schematic diagram of the motor rotor construction embodiment two of the present invention；
Fig. 4 is the structural schematic diagram of the motor rotor construction embodiment three of the present invention；
Fig. 5 is the structural schematic diagram of the motor rotor construction example IV of the present invention；
Fig. 6 is the motor rotor construction simulation comparison result of the motor rotor construction and one embodiment of the invention of the prior art
Figure.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, right with reference to the accompanying drawings and embodiments
The motor rotor construction and magneto of the present invention is further elaborated.It should be appreciated that specific reality described herein
It applies example to be only used for explaining the present invention, be not intended to limit the present invention.
Referring to figs. 1 to Fig. 5, the motor rotor construction of one embodiment of the invention, including rotor core 100, rotor core 100
Multiple permanent magnet trough groups are equipped with, multiple permanent magnet trough groups are evenly distributed on the central axis side of rotor core 100, Mei Geyong
The U-shaped or V-type that magnet slot group is justified in opening towards 100 periphery of rotor core, each permanent magnet trough group is interior to be arranged permanent magnet 200,
Each group permanent magnet 200 is alternately arranged in the circumferencial direction of rotor core 100 in N, S.It is arranged six in figure on rotor core 100 forever
Magnet slot group.
Each permanent magnet trough group includes at least two sections of sequentially connected permanent magnet troughs 101, adjacent two sections of permanent magnet troughs 101
Between be arranged magnetic bridge 102, the both ends of permanent magnet trough group are also both provided with magnetic bridge 102.
Since the magnetic resistance that the magnetic resistance at magnetic bridge is less than permanent magnet portion works as electricity at this point, permanent magnet portion is equivalent to air
When machine demagnetizes, demagnetization magnetic flux can pass through along the path of magnetic resistance minimum, and demagnetization magnetic flux will have major part by magnetic bridge, change
The magnetic potential circulating direction for having become demagnetized field, the demagnetization magnetic potential acted on permanent magnet are obviously reduced, and effectively increase motor
Anti- demagnetization capability.
Embodiment one
As depicted in figs. 1 and 2, U-shaped, each permanent magnet that permanent magnet trough group is justified in opening towards 100 periphery of rotor core
Slot group is formed by three sections of sequentially connected permanent magnet troughs 101, and the permanent magnet trough 101 of interlude is arcuate structure, head and the tail section
Permanent magnet trough 101 is square structure or class square structure.
Wherein, arc-shaped permanent magnet 200 is set in the permanent magnet trough 101 of interlude, is all provided in the permanent magnet trough 101 of head and the tail section
Set rectangular permanent magnet 200.In same permanent magnet trough group, due to the permanent magnet trough of the permanent magnet trough 101 and head and the tail section of interlude
Magnetic bridge 102 is all had between 101, between arc-shaped permanent magnet 200 and direction permanent magnet 200 by magnetic bridge 102 carry out every
From magnetic bridge 102 is as guiding demagnetization magnetic circuit.
Preferably, in same permanent magnet trough group, the center line pair of two rectangular permanent magnets, 200 opposing arcuate permanent magnet 200
Claim setting.
As a kind of embodiment, in same permanent magnet trough group, the magnetic bridge between adjacent two sections of permanent magnet troughs 101
102 width are a, and the width of the magnetic bridge 102 at permanent magnet trough group both ends is c, wherein 1≤a/c≤2.5.
It, can obviously demagnetization magnetic potential of the weakening effect on permanent magnet magnetization, and then reduction permanent magnetism when designing 1≤a/c≤2.5
Body demagnetizes to inflection point area below, improves the anti-demagnetization capability of permanent magnet.Use the present embodiment magnet steel demagnetize to inflection point with
Under area significantly reduce, compared with the prior art, the calculated motor demagnetization current of the present embodiment improves 32% or more.
Obviously, in each permanent magnet trough group, can permanent magnet be set in any permanent magnet trough；Alternatively, also can be arbitrary
Permanent magnet is set in two permanent magnet troughs.It is not arranged in the permanent magnet trough 101 of permanent magnet and air dielectric or/and non magnetic can be filled
Material.
Embodiment two
As shown in figure 3, the difference between this embodiment and the first embodiment lies in：In same permanent magnet trough group, head and the tail section is forever
101 edge of magnet slot also sets up bevelled edge, and the bevelled edge is located at the opening inner side of the permanent magnet trough group, and is placed in described
The end of permanent magnet trough group, the rectangular permanent magnet 200 in the permanent magnet trough 101 of the head and the tail section are also correspondingly arranged bevelled edge.
Preferably, the center line symmetrical setting of the bevelled edge opposing arcuate permanent magnet 200 of the permanent magnet trough 101 of head and the tail section.
Bevelled edge is set, can effectively guide demagnetization magnetic potential towards smaller 100 excircle part of rotor core of magnetic resistance every magnetic
Pass through at bridge 102, i.e. guiding demagnetization magnetic potential is towards passing through at the magnetic bridge 102 at permanent magnet trough group both ends.So further promoted
The anti-demagnetization capability of motor.
Preferably, vertical range of the bevelled edge top at 101 center line rotor outer circle of permanent magnet trough is b, permanent magnet trough
The width of magnetic bridge 102 at group both ends is c, wherein 1.5≤b/c≤5.101 center line rotor outer circle of permanent magnet trough herein
Place refers to：Outside symmetrical center line close to the rotor core 101 of the bevelled edge and the rotor core 101 close to the bevelled edge
The intersection of Zhou Yuan.
Wherein, the mis-cut angle of bevelled edge is θ, -240/2p ° of 150 °≤θ≤180 °, wherein p is number of pole-pairs, p >=6, and
P is even number.The mis-cut angle of bevelled edge refer between 200 short side of bevelled edge and direction permanent magnet (side in width direction) institute at
The angle of obtuse angle angle.
The demagnetization area of the motor rotor construction of the present embodiment, permanent magnet will reduce, and further increase the anti-of permanent magnet
Demagnetization capability.
Embodiment three
As shown in figure 4, the difference between this embodiment and the first embodiment lies in：In same permanent magnet trough group, head and the tail section is forever
101 width of magnet slot is more than 101 width of permanent magnet trough of interlude.That is, the width of rectangular permanent magnet 200 is more than arcuate permanent magnetic
The width of body 200.At this point, rectangular permanent magnetism body thickness (width in figure) increases, same magnetic potential of demagnetizing acts on permanent magnet 200
On, since the area of permanent magnet 200 increases, the demagnetization of permanent magnet will be reduced to inflection point area below, equally can be into one
Step improves the anti-demagnetization capability of permanent magnet.
In the present embodiment, the design of the bevelled edge in embodiment two can also be used in 101 edge of permanent magnet trough of head and the tail section, first
Rectangular permanent magnet 200 in the permanent magnet trough 101 of endpiece is also correspondingly arranged bevelled edge.Preferably, the permanent magnet trough 101 of head and the tail section
Bevelled edge opposing arcuate permanent magnet 200 center line symmetrical setting.
Bevelled edge is set, can effectively guide demagnetization magnetic potential towards smaller 100 excircle part of rotor core of magnetic resistance every magnetic
Pass through at bridge 102, i.e., guiding demagnetization magnetic potential further improves electricity towards passing through at the magnetic bridge 102 at permanent magnet trough group both ends
The anti-demagnetization capability of machine.
Example IV
As shown in figure 5, the V-type that each permanent magnet trough group is justified in opening towards 100 periphery of rotor core, each permanent magnet trough
Group is formed by two sections of sequentially connected permanent magnet troughs 101, and the magnetic bridge 102 between adjacent two sections of permanent magnet troughs 101, two sections forever
Magnet slot 101 is square structure or class square structure, and rectangular permanent magnet 200, two sides are respectively provided in two sections of permanent magnet troughs 101
The 200 V-shaped arrangement of shape permanent magnet.Permanent magnet trough group is designed to V-type, it is possible to reduce permanent magnet quantity reduces complex process journey
Degree.
In the present embodiment, the design of the bevelled edge in embodiment two also can be used in two sections of permanent magnet troughs 101.Two sections of permanent magnets
Rectangular permanent magnet 200 in slot 101 is also correspondingly arranged bevelled edge.Preferably, the bevelled edge relative rotor of two sections of permanent magnet troughs 101
The diameter of iron core 100 is symmetrical arranged to the midline.
Certainly, the bevelled edge design that any one section in two sections of permanent magnet troughs 101 can be used in embodiment two.Using beveling
Rectangular permanent magnet 200 in the permanent magnet trough 101 of side design is also correspondingly arranged bevelled edge.
Bevelled edge is set, and the demagnetization area of permanent magnet will reduce, and further increase the anti-demagnetization capability of permanent magnet.
Embodiment five
The present invention also provides a kind of magneto, including the motor rotor construction described in any one technical solution, Permanent Magnet and Electrics
Machine is the prior art in addition to above-mentioned motor rotor construction, and details are not described herein again.Magneto is due to using above-mentioned rotor
Structure, therefore also achieve same advantageous effects.
The motor rotor construction and magneto of the above various embodiments, each permanent magnet trough group connect successively including at least two sections
The permanent magnet trough connect, is arranged magnetic bridge between adjacent two sections of permanent magnet troughs, the both ends of permanent magnet trough group be also both provided with every
Magnetic bridge, since the magnetic resistance at magnetic bridge is less than the magnetic resistance of permanent magnet portion, demagnetization magnetic flux will have most of by magnetic bridge, change
The magnetic potential circulating direction of demagnetized field, the demagnetization magnetic potential acted on permanent magnet are obviously reduced, and effectively increase the anti-of motor
Demagnetization capability.Rotor structure of the present invention can effectively reduce the demagnetized field acted on permanent magnet compared with prior art, improve
The demagnetization current of motor realizes the highly resistance demagnetization design of motor.By being compared it is found that prior art motor with existing magneto
Demagnetization current is 25A, and the motor demagnetization current of above example can reach 33A, compared with the prior art, magneto of the present invention
Demagnetization current improve 32% or more, the anti-demagnetization capability of motor is obviously improved.As shown in fig. 6, Fig. 6 is the motor of the prior art
The motor rotor construction simulation comparison result figure of rotor structure and one embodiment of the invention, wherein left side analogous diagram is existing in Fig. 6
There is a motor rotor construction analogous diagram of technology, right side analogous diagram is that the motor rotor construction of one embodiment of the invention emulates in Fig. 6
Figure.Two pieces of right side permanent magnet in the analogous diagram of left side is the permanent magnet after identified demagnetization, the permanent magnetism after identified demagnetization
The most dark position of body is expressed as demagnetization to the area of inflection point permanent magnet below；Two pieces of right side permanent magnet in the analogous diagram of right side is
Permanent magnet after identified demagnetization, it is below to inflection point that the most dark position of permanent magnet after identified demagnetization is expressed as demagnetization
The area of permanent magnet.As can be seen that the permanent magnet of the motor rotor construction of one embodiment of the invention from simulation comparison result figure
It demagnetizes to inflection point area below and significantly reduces, anti-demagnetization capability significantly improves.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of motor rotor construction, which is characterized in that including rotor core (100), the rotor core (100) is equipped with more
A permanent magnet trough group, multiple permanent magnet trough groups are evenly distributed on the central axis side of the rotor core (100), each
The U-shaped or V-type that the permanent magnet trough group is justified in opening towards the rotor core (100) periphery, each permanent magnet trough group
Interior setting permanent magnet (200), each permanent magnet trough group includes at least two sections of sequentially connected permanent magnet troughs (101), adjacent
Two sections of permanent magnet troughs (101) between setting magnetic bridge (102), the both ends of the permanent magnet trough group be also both provided with every
Magnetic bridge (102)；
The opening inner side of the permanent magnet trough group is provided with bevelled edge, and the bevelled edge is located at the end of the permanent magnet trough group；
The rectangular permanent magnet (200) being arranged in the permanent magnet trough group is also arranged in correspondence with bevelled edge；
Vertical range of the bevelled edge top at permanent magnet trough (101) center line rotor outer circle is b, the permanent magnet trough group
The width of magnetic bridge (102) at both ends is c, wherein 1.5≤b/c≤5.
2. motor rotor construction according to claim 1, which is characterized in that the permanent magnet trough group is in be open towards rotor
Iron core (100) periphery is justified U-shaped, and each permanent magnet trough group is formed by three sections of sequentially connected permanent magnet troughs (101), in
Between the permanent magnet trough (101) of section be arcuate structure, the permanent magnet trough (101) of head and the tail section is square structure or class square structure.
3. motor rotor construction according to claim 2, which is characterized in that in the permanent magnet trough (101) of the interlude
Arc-shaped permanent magnet is set, rectangular permanent magnet (200) is respectively provided in the permanent magnet trough (101) of the head and the tail section.
4. motor rotor construction according to claim 1, which is characterized in that the mis-cut angle of the bevelled edge be θ, 150 °
- 240/2p ° of≤θ≤180 °, wherein p is that rotor number of pole-pairs, p >=6, and p are even number.
5. motor rotor construction according to claim 2 or 3, which is characterized in that the permanent magnet trough (101) of the head and the tail section
Width is more than permanent magnet trough (101) width of the interlude.
6. according to claim 1-4 any one of them motor rotor constructions, which is characterized in that in the same permanent magnet trough group
In, magnetic bridge (102) width between adjacent two sections of permanent magnet troughs (101) is a, at the permanent magnet trough group both ends every
The width of magnetic bridge (102) is c, wherein 1≤a/c≤2.5.
7. motor rotor construction according to claim 1, which is characterized in that the permanent magnet trough group is in opening described in
The V-type of rotor core (100) periphery circle, each permanent magnet trough group is by two sections of sequentially connected permanent magnet trough (101) institute shapes
It is square structure or class square structure at, two sections of permanent magnet troughs (101), is all provided in two sections of permanent magnet troughs (101)
Set rectangular permanent magnet (200).
8. a kind of magneto, which is characterized in that including claim 1-7 any one of them motor rotor constructions.
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| CN201510559553.5A CN106487134B (en) | 2015-09-02 | 2015-09-02 | Motor rotor construction and magneto |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510559553.5A CN106487134B (en) | 2015-09-02 | 2015-09-02 | Motor rotor construction and magneto |
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| Publication Number | Publication Date |
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| CN106487134A CN106487134A (en) | 2017-03-08 |
| CN106487134B true CN106487134B (en) | 2018-11-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3064837B1 (en) * | 2017-04-03 | 2020-01-17 | Moving Magnet Technologies | ROTOR FOR ELECTRIC MACHINE WITH INTERNAL PERMANENT MAGNETS |
| CN107394923B (en) * | 2017-08-30 | 2020-03-06 | 广东威灵电机制造有限公司 | Rotor core and rotor |
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| CN203206017U (en) * | 2013-03-14 | 2013-09-18 | 珠海格力电器股份有限公司 | Permanent magnet injection molding rotor and motor |
| CN103580321A (en) * | 2012-07-24 | 2014-02-12 | 广东美芝精密制造有限公司 | Permanent magnet motor rotor structure for compressor |
| CN203747527U (en) * | 2013-02-14 | 2014-07-30 | 三菱电机株式会社 | Permanent magnet embedded type motor, compressor and refrigeration air conditioner |
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| CN205141858U (en) * | 2015-09-02 | 2016-04-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Electric motor rotor structure and permanent -magnet machine |
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2015
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580321A (en) * | 2012-07-24 | 2014-02-12 | 广东美芝精密制造有限公司 | Permanent magnet motor rotor structure for compressor |
| CN202978479U (en) * | 2012-11-05 | 2013-06-05 | 艾默生环境优化技术(苏州)有限公司 | Motor rotor and motor and compressor comprising same |
| CN203747527U (en) * | 2013-02-14 | 2014-07-30 | 三菱电机株式会社 | Permanent magnet embedded type motor, compressor and refrigeration air conditioner |
| CN203206017U (en) * | 2013-03-14 | 2013-09-18 | 珠海格力电器股份有限公司 | Permanent magnet injection molding rotor and motor |
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