CN207819580U - Combined magnetic pole permanent magnet rotor structure and permanent magnet synchronous motor - Google Patents
Combined magnetic pole permanent magnet rotor structure and permanent magnet synchronous motor Download PDFInfo
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- CN207819580U CN207819580U CN201721798671.2U CN201721798671U CN207819580U CN 207819580 U CN207819580 U CN 207819580U CN 201721798671 U CN201721798671 U CN 201721798671U CN 207819580 U CN207819580 U CN 207819580U
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Abstract
A kind of combined magnetic pole permanent magnet rotor structure of the utility model offer and permanent magnet synchronous motor.Wherein combined magnetic pole permanent magnet rotor structure includes at least two magnetic poles, and the magnetic pole includes permanent magnetism magnetic pole and magnetic resistance magnetic pole；The permanent magnetism magnetic pole includes the first hollow slots being set in electric machine rotor iron core, and places permanent magnet in first hollow slots；The magnetic resistance magnetic pole includes the second hollow slots being set in electric machine rotor iron core, and places non-magnetic material in second hollow slots；In two magnetic poles of the arbitrary neighborhood of the rotor, one of magnetic pole is the permanent magnetism magnetic pole, another magnetic pole is the magnetic resistance magnetic pole.Technical solution provided by the utility model is placed by permanent magnetism magnetic pole and magnetic resistance magnetic pole mixed and alternate, is effectively increased the reluctance torque of motor, is reduced permanent magnet dosage so that cost is greatly lowered.
Description
Technical field
The utility model is related to motor field more particularly to a kind of combined magnetic pole permanent magnet rotor structure and permanent magnet synchronous electrics
Machine.
Background technology
Motor is a kind of device for realizing energy converting between mechanical, and the rotor component mainly converted by completion energy transmits
The shaft of mechanical energy and for its provide protection casing constitute.Magneto carries out excitation using high-performance permanent magnet, with tradition
The electro-magnetic motor for possessing Exciting Windings for Transverse Differential Protection is compared, and magneto has simple in structure, reliable for operation, efficient, motor shape ruler
Very little flexile remarkable advantage, while the collector ring and brush of the problem of being susceptible to are also eliminated, improve motor running
Reliability, application range is extremely wide.But that there are permanent magnet dosages is more for the permanent magnet synchronous motor of the prior art, cost is higher, magnetic
Resistive torque accounts for the problems such as smaller in total output torque.
Utility model content
The main purpose of the utility model is to overcome the defects of the above-mentioned prior art, provide a kind of combined magnetic pole permanent magnetism
Rotor structure and permanent magnet synchronous motor, to solve the problems, such as that the of high cost of the prior art, reluctance torque accounting are small.
On the one hand the utility model provides a kind of combined magnetic pole permanent magnet rotor structure, including at least two magnetic poles, described
Magnetic pole includes permanent magnetism magnetic pole and magnetic resistance magnetic pole；The permanent magnetism magnetic pole includes the first hollow slots being set in electric machine rotor iron core,
And place permanent magnet in first hollow slots；The magnetic resistance magnetic pole includes the second hollow out being set in electric machine rotor iron core
Slot, and place non-magnetic material in second hollow slots；In two magnetic poles of the arbitrary neighborhood of the rotor,
In magnetic pole be the permanent magnetism magnetic pole, another magnetic pole is the magnetic resistance magnetic pole.
Optionally, the first hollow slots of the permanent magnetism magnetic pole and/or the second hollow slots of the magnetic resistance magnetic pole are about respective
Pole center line be set as symmetric shape.
Optionally, the symmetric shape includes：V-shape, U-shaped or "-" type.
Optionally, the long LAB of the first camber line is set as：2W+N/2P*(W+U)<LAB<6W+N/2P*(W+U)；Wherein, described
The long LAB of first camber line is the arc length that is determined by the first intersection point A and the second intersection points B in electric machine stator iron inner circle, described the
One intersection point A and the second intersection points B are respectively：The symmetrical center line for the permanent magnet placed in first hollow slots of the permanent magnetism magnetic pole is prolonged
After length, two intersection points with electric machine stator iron inner circle；N is the slot number of electric machine stator iron；P is the extremely right of electric machine rotor iron core
Number, the number of pole-pairs is the number of the permanent magnetism magnetic pole and the magnetic resistance magnetic pole；W is electric machine stator iron width of rebate；U is tooth
Boots width.
Optionally, the long LCD of the second camber line is set as：0.75*LAB<LCD<0.9*LAB；Wherein, second camber line is long
LCD is the arc length that is determined by third intersection point C and the 4th intersection point D in electric machine stator iron inner circle, the third intersection point C and the
Four intersection point D are respectively：After the symmetrical center line of second hollow slots of the magnetic resistance magnetic pole extends, with electric machine stator iron inner circle
Two intersection points.
The another aspect of the utility model provides a kind of permanent magnet synchronous motor again, has mixing described in any one of the above embodiments
Magnetic pole permanent magnet rotor structure.
Optionally, the permanent magnet synchronous motor is IPM synchronous motor.
Technical solution provided by the utility model is placed by permanent magnetism magnetic pole and magnetic resistance magnetic pole mixed and alternate, is effectively increased electricity
The reluctance torque of machine reduces permanent magnet dosage so that cost is greatly lowered.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and constitutes one of the utility model
Point, the exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the utility model
Improper restriction.In the accompanying drawings：
Fig. 1 is the schematic cross-section of the V-shape embodiment of combined magnetic pole permanent magnet rotor structure provided by the utility model；
Fig. 2 is the schematic three dimensional views of the V-shape embodiment of combined magnetic pole permanent magnet rotor structure provided by the utility model；
Fig. 3 is the size signal schematic diagram of combined magnetic pole permanent magnet rotor structure provided by the utility model；
Fig. 4 is the schematic cross-section of the U-shaped embodiment of combined magnetic pole permanent magnet rotor structure provided by the utility model；
Fig. 5 is the schematic cross-section of the "-" type embodiment of combined magnetic pole permanent magnet rotor structure provided by the utility model；
Fig. 6 is the optimal optimization interval diagram of combined magnetic pole permanent magnet rotor structure provided by the utility model；
Fig. 7 is the cost-performance contrast schematic diagram of combined magnetic pole permanent magnet rotor structure provided by the utility model.
Specific implementation mode
It is specific below in conjunction with the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Technical solutions of the utility model are clearly and completely described in embodiment and corresponding attached drawing.Obviously, described embodiment
Only it is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field
The every other embodiment that those of ordinary skill is obtained without making creative work, belongs to the utility model
The range of protection.
It should be noted that term " first " in the specification and claims of the utility model and above-mentioned attached drawing,
" second " etc. is for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that in this way
The data used can be interchanged in the appropriate case, so that the embodiments of the present invention described herein can be in addition at this
In illustrate or description those of other than sequence implement.In addition, term " comprising " and " having " and their any deformation, meaning
Figure, which is to cover, non-exclusive includes.
On the one hand the utility model provides a kind of combined magnetic pole permanent magnet rotor structure.Fig. 1 is provided by the utility model
The schematic cross-section of the V-shape embodiment of combined magnetic pole permanent magnet rotor structure；Fig. 2 be combined magnetic pole provided by the utility model forever
The schematic three dimensional views of the V-shape embodiment of magnetic rotor structure.As depicted in figs. 1 and 2, the utility model combined magnetic pole p-m rotor
Structure includes at least two magnetic poles, and the magnetic pole includes permanent magnetism magnetic pole 102 and magnetic resistance magnetic pole 103；The permanent magnetism magnetic pole 102 includes
The first hollow slots being set in electric machine rotor iron core, and place permanent magnet in first hollow slots；The magnetic resistance magnetic pole
103 include the second hollow slots being set in electric machine rotor iron core, and places non-magnetic material in second hollow slots；
In two magnetic poles of the arbitrary neighborhood of the rotor, one of magnetic pole is the permanent magnetism magnetic pole 102, another magnetic pole is
The magnetic resistance magnetic pole 103.
Embodiment schematic cross-section shown in FIG. 1 illustrates one kind with embodiment schematic three dimensional views shown in Fig. 2
Mixed magnetic pole permanent magnetic motor rotor structure.The rotor core 101 of the motor is usually made of permeability magnetic material, such as silicon steel sheet, non-
Brilliant material etc..Several regular air grooves are dispersed in this rotor core：Rare earth neodymium iron is placed in portion of air slot
The permanent magnets such as boron or ferrite provide permanent-magnet torque, referred to as permanent magnetism magnetic pole 102 for motor；There was only air in portion of air slot
Or filled by other non-magnetic materials such as resin, provide reluctance torque, referred to as magnetic resistance magnetic pole 103 for motor；Two kinds of magnetic pole alternatings
It places, while permanent-magnet torque and reluctance torque is provided for motor.
When the magnetic conductance of rotor magnetic circuit has larger variation on area of space, i.e., there are several rule inside rotor core
The air groove of distribution is restrained, magnetic pull is generated between stator and rotor cores, forms the torque of magnetic resistance property, commonly referred to as reluctance torque,
Motor with reluctance torque fan-out capability is properly termed as reluctance motor.Permanent-magnet torque is the permanent magnet and stator being distributed by rule
Magnetic fields generate, and can the permanent magnet that rule is distributed be known as permanent magnetism magnetic pole, similarly, inside reluctance motor, can incite somebody to action
The air groove for generating the rule distribution of reluctance torque is known as magnetic resistance magnetic pole.Not according to rotor structure and permanent magnet position
Together, can be divided into permanent magnet surfaces posted with it is embedded, the permanent magnet of IPM synchronous motor is embedded in internal rotor deeply.
Technical solution provided by the utility model is related to the design that internal rotor opens magnet steel slot structure, is consequently adapted to answering for embedded rotor
With.
Unlike traditional magneto, traditional magneto be it is each extremely in have permanent magnet, consecutive roots
Permanent magnet polarity is different；And technical solution provided by the utility model, permanent magnet pole be opened on rotor magnetic resistance pole institute between
It separates, therefore the dosage of permanent magnet can be reduced close to half, in the case where not changing motor torque fan-out capability, be had
Effect reduces the permanent magnet dosage of built-in permanent magnetic motor, and reduces motor cost.
Fig. 3 is the size signal schematic diagram of combined magnetic pole permanent magnet rotor structure provided by the utility model, is to this practicality
The mixed magnetic pole permanent magnetic motor of the technical solution of novel proposition carries out sizing specification.The slot number of the stator core 301 of the motor is remembered
For N, interior stator slot is copper conductors 302；The number of pole-pairs of the rotor core 101 of the motor is P, that is, has P 102 He of permanent magnetism magnetic pole
P magnetic resistance magnetic pole 103 is alternately placed.The symmetrical center line for the permanent magnet placed inside permanent magnetism magnetic pole, after extension with stator core
Inner circle meets at A, B at 2 points, and the symmetrical center line of magnetic resistance magnetic pole inner air slot meets at C, D two after extension with stator core inner circle
Point.Note stator core slot opening degree is W, and tooth boots width is U, then by the circle of 2 points of determinations of 2 points of AB and CD in stator core inner circle
Arc length can be indicated that note arc AB length is LAB (i.e. the first camber line is long), arc CD by stator rabbet width W and tooth boots width U
Length is LCD (i.e. the second camber line is long).
As shown in figure 3, according to a kind of embodiment of the utility model combined magnetic pole permanent magnet rotor structure, the first camber line is long
LAB is set as：
2W+N/2P*(W+U)<LAB<6W+N/2P*(W+U)；(1)
Wherein, the long LAB of the first camber line is to be determined by the first intersection point A and the second intersection points B in electric machine stator iron inner circle
Arc length, the first intersection point A and the second intersection points B are respectively：It is placed forever in first hollow slots of the permanent magnetism magnetic pole
After the symmetrical center line of magnet extends, two intersection points with electric machine stator iron inner circle；N is the slot number of electric machine stator iron；P is
The number of pole-pairs of electric machine rotor iron core, the number of pole-pairs are the numbers of the permanent magnetism magnetic pole and the magnetic resistance magnetic pole；W is motor stator
Iron core notch width；U is tooth boots width.
According to a kind of embodiment of the utility model combined magnetic pole permanent magnet rotor structure, the long LCD of the second camber line is set as：
0.75*LAB<LCD<0.9*LAB；(2)
Wherein, the long LCD of the second camber line is to be determined by third intersection point C and the 4th intersection point D in electric machine stator iron inner circle
Arc length, the third intersection point C and the 4th intersection point D are respectively：The symmetrical centre of second hollow slots of the magnetic resistance magnetic pole
After line extends, two intersection points with electric machine stator iron inner circle.
Adjust the length of pole arc of the permanent magnetism magnetic pole and magnetic resistance magnetic pole of electric motor with combined magnetic pole so that rotor core magnetic conductance is in space
Distribution on region changes, and can effectively promote accounting of the reluctance torque in total output torque, also can be to permanent magnet
Dosage modify.Total output torque refers to the sum of permanent-magnet torque and reluctance torque, and accounting is exactly that reluctance torque accounts for total output
The percentage of torque.When LAB and LCD meet the value range of above-mentioned (1) formula and (2) formula, the drop of mixed magnetic pole permanent magnetic motor
Cost optimization effect is best.
Fig. 6 is the optimal optimization interval diagram of combined magnetic pole permanent magnet rotor structure provided by the utility model.In Fig. 6
Abscissa is the long LAB of the first camber line, ordinate data 60%, 70%, 100% be permanent magnet dosage and output torque ratio.
Optimal optimization section shown in fig. 6, to the utility model proposes technical solution in mixed magnetic pole permanent magnetic motor size most
Excellent value range illustrates.In magneto, output torque and the permanent magnet dosage of the motor have positively related pass
System, and permanent magnet is also the important component of magneto cost.That is, permanent magnet dosage is more, the output of motor
Torque is accordingly bigger, and cost is also higher.Therefore, it is possible to use the ratio of permanent magnet dosage and output torque, a to evaluate
The cost declining effect of optimization of magneto.
Referring to (1) formula, in figure 6,401 be 2W+N/2P* (W+U)；402 be 6W+N/2P* (W+U).From Fig. 6,
It is the section of the ratio between permanent magnet dosage and output torque minimum between 401-402, this section is also reluctance torque accounting simultaneously
Maximum section.The longitudinal axis indicates the permanent magnetism scale of construction that units of torque needs, at this section 401-402, units of torque in Fig. 6
Permanent magnet dosage is minimum, and permanent-magnet torque accounting is also minimum, therefore reluctance torque is also maximum within the scope of this.
Fig. 7 is the cost-performance contrast schematic diagram of combined magnetic pole permanent magnet rotor structure provided by the utility model.The cross of Fig. 7
Coordinate is load, the amount that numerical value 50%, 100% are equivalent to perunit value, for example nominal load is 1, then 50% refer to is exactly 0.5
It loads again.Fig. 7 describes the technique effect in entirely load section.Curve 1 in Fig. 7 indicate the magneto of the prior art into
The relation curve of permanent magnet dosage and output torque ratio under row different loads；Curve 2 indicate the utility model proposes skill
Magneto in art scheme carries out the relation curve of permanent magnet dosage and output torque ratio under different loads.Shown in Fig. 7
Cost-performance comparison diagram, illustrate the utility model proposes technical solution in mixed magnetic pole permanent magnetic motor relative to tradition
The effect for reducing cost of magneto.By the utility model proposes technical solution in mixed magnetic pole permanent magnetic motor, with one
The magneto for the prior art that the identical size of money, identical slot number coordinate carries out the permanent magnet dosage under different loads and turns with output
The calculating and comparison of moment ratio value.It is clear from the figure that the utility model proposes technical solution in combined magnetic pole forever
Magneto has apparent reduction cost optimization effect, permanent magnet dosage under the same load at most to reduce 40%.
According to a kind of embodiment of the utility model combined magnetic pole permanent magnet rotor structure, the first of the permanent magnetism magnetic pole engraves
Second hollow slots of empty slot and/or the magnetic resistance magnetic pole are set as symmetric shape about respective pole center line.Wherein, described right
Claim shape include：V-shape, U-shaped or "-" type.Fig. 1 and Fig. 2 is combined magnetic pole permanent magnet rotor structure provided by the utility model
V-shape embodiment schematic cross-section and schematic three dimensional views；Fig. 4 is combined magnetic pole p-m rotor knot provided by the utility model
The schematic cross-section of the U-shaped embodiment of structure；Fig. 5 is the "-" type of combined magnetic pole permanent magnet rotor structure provided by the utility model
The schematic cross-section of embodiment.Two blocks of magnet steel that the shape of permanent magnetism magnetic pole is not limited only to Fig. 1 and Fig. 2 are V-shaped symmetrically placed, also may be used
With as shown in Figure 4 and Figure 5, permanent magnetism magnetic pole uses U-shaped or a type magnet steel.It is carried out when meeting preferred size shown in fig. 6
When magnet steel is arranged, apparent cost declining effect of optimization can be equally obtained.
To sum up, the utility model provides a kind of combined magnetic pole p-m rotor different from conventional permanent magnet motor rotor structure
Structure.Conventional permanent magnet motor, which is adjacent pole, permanent magnet arrangement, and adjacent polarity is different, in circumference in decile point in structure
Cloth.And in technical solution provided by the utility model, adjacent magnetic pole is different, a in two magnetic poles of arbitrary neighborhood,
In a pole be permanent magnet, another pole is the magnetic resistance pole containing air groove, also can be filled other non-magnetic materials.And it is adjacent
The polar arc of pole is different, i.e. LAB ≠ LCD.It is placed by permanent magnetism magnetic pole and magnetic resistance magnetic pole mixed and alternate, is effectively increased motor
Reluctance torque realizes the increased design of built-in permanent magnetic magnetic resistance of motor torque accounting, reduces permanent magnet dosage so that cost is big
To reduce.
The another aspect of the utility model provides a kind of permanent magnet synchronous motor again, has mixing described in any one of the above embodiments
Magnetic pole permanent magnet rotor structure.
According to a kind of embodiment of the utility model permanent magnet synchronous motor, the permanent magnet synchronous motor is built-in permanent magnetic
Synchronous motor.
Technical solution provided by the utility model is placed by permanent magnetism magnetic pole and magnetic resistance magnetic pole mixed and alternate, is effectively increased electricity
The reluctance torque of machine reduces permanent magnet dosage so that cost is greatly lowered.
The above description is only the embodiments of the present invention, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the right of the utility model.
Claims (7)
1. a kind of combined magnetic pole permanent magnet rotor structure, which is characterized in that including at least two magnetic poles, the magnetic pole includes permanent-magnet magnetic
Pole and magnetic resistance magnetic pole；
The permanent magnetism magnetic pole includes the first hollow slots being set in electric machine rotor iron core, and is placed in first hollow slots
Permanent magnet；
The magnetic resistance magnetic pole includes the second hollow slots being set in electric machine rotor iron core, and is placed in second hollow slots
Non-magnetic material；
In two magnetic poles of the arbitrary neighborhood of the rotor, one of magnetic pole is the permanent magnetism magnetic pole, another magnetic
The extremely described magnetic resistance magnetic pole.
2. structure according to claim 1, which is characterized in that the first hollow slots of the permanent magnetism magnetic pole and/or the magnetic
Second hollow slots of resistance magnetic pole are set as symmetric shape about respective pole center line.
3. structure according to claim 2, which is characterized in that the symmetric shape includes：V-shape, U-shaped or a word
Type.
4. structure according to any one of claim 1-3, which is characterized in that the long LAB of the first camber line is set as：2W+N/
2P*(W+U)<LAB<6W+N/2P*(W+U)；
Wherein, the long LAB of the first camber line is the circle determined by the first intersection point A and the second intersection points B in electric machine stator iron inner circle
Arc length, the first intersection point A and the second intersection points B are respectively：The permanent magnet placed in first hollow slots of the permanent magnetism magnetic pole
Symmetrical center line extend after, two intersection points with electric machine stator iron inner circle；N is the slot number of electric machine stator iron；P is motor
The number of pole-pairs of rotor core, the number of pole-pairs are the numbers of the permanent magnetism magnetic pole and the magnetic resistance magnetic pole；W is electric machine stator iron
Width of rebate；U is tooth boots width.
5. structure according to claim 4, which is characterized in that the long LCD of the second camber line is set as：0.75*LAB<LCD<
0.9*LAB；
Wherein, the long LCD of the second camber line is the circle determined by third intersection point C and the 4th intersection point D in electric machine stator iron inner circle
Arc length, the third intersection point C and the 4th intersection point D are respectively：The symmetrical center line of second hollow slots of the magnetic resistance magnetic pole is prolonged
After length, two intersection points with electric machine stator iron inner circle.
6. a kind of permanent magnet synchronous motor, which is characterized in that have the combined magnetic pole permanent magnetism as described in any one of claim 1-5
Rotor structure.
7. permanent magnet synchronous motor according to claim 6, which is characterized in that the permanent magnet synchronous motor is built-in permanent magnetic
Synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721798671.2U CN207819580U (en) | 2017-12-21 | 2017-12-21 | Combined magnetic pole permanent magnet rotor structure and permanent magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721798671.2U CN207819580U (en) | 2017-12-21 | 2017-12-21 | Combined magnetic pole permanent magnet rotor structure and permanent magnet synchronous motor |
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| Publication Number | Publication Date |
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| CN207819580U true CN207819580U (en) | 2018-09-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134462A (en) * | 2017-12-21 | 2018-06-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Combined magnetic pole permanent magnet rotor structure, setting method and permanent magnet synchronous motor |
-
2017
- 2017-12-21 CN CN201721798671.2U patent/CN207819580U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134462A (en) * | 2017-12-21 | 2018-06-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Combined magnetic pole permanent magnet rotor structure, setting method and permanent magnet synchronous motor |
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