CN211579726U - High-reluctance permanent magnet synchronous rotor structure of new energy automobile driving motor - Google Patents
High-reluctance permanent magnet synchronous rotor structure of new energy automobile driving motor Download PDFInfo
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- CN211579726U CN211579726U CN202020413593.5U CN202020413593U CN211579726U CN 211579726 U CN211579726 U CN 211579726U CN 202020413593 U CN202020413593 U CN 202020413593U CN 211579726 U CN211579726 U CN 211579726U
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Abstract
The utility model relates to a high magnetic resistance permanent magnet synchronous rotor structure of a new energy automobile driving motor; the magnetic pole structure comprises a rotor and magnetic steel, wherein the rotor is provided with a plurality of symmetrical magnetic poles, the polarities of adjacent magnetic poles are opposite, each magnetic pole comprises a plurality of V-shaped magnetic steel grooves which form a multilayer groove body structure and are provided with openings facing to the surface of the outer circle of the rotor, the magnetic steel is respectively arranged in the V-shaped magnetic steel grooves, and the magnetic poles are provided with a plurality of auxiliary grooves which penetrate through the surface of the outer circle of the rotor to form notches with different R diameters; the beneficial effects of the utility model embody: the salient pole ratio and the reluctance torque are improved by adopting a double-layer V-groove structure in each magnetic pole of the rotor, the using amount of a permanent magnet is reduced to reduce the cost, 4 arc notches with different R diameters are arranged on the surface of the outer circle of the rotor of each magnetic pole, so that a non-uniform air gap is formed between the magnetic pole and the stator, harmonic waves are effectively eliminated, the torque pulsation and the cogging torque are reduced, the rotor adopts a straight groove laminating process to replace a traditional skewed slot laminating process, the production process is simplified, the production efficiency is improved, and the production cost is reduced.
Description
Technical Field
The utility model relates to a driving motor rotor technical field refers in particular to a high reluctance permanent magnetism synchronous rotor structure who is arranged in the power assembly of fields such as new energy automobile driving motor, low-speed electric motor car driving motor, servo motor to improve the new energy automobile driving motor that the reluctance torque proportion accounts for than.
Background
In order to solve the problems of energy crisis and environmental pollution, the automobile industry has gradually advanced to the new energy industrialization process, a permanent magnet synchronous motor is built in a new energy automobile, the torque of the permanent magnet synchronous motor is composed of reluctance torque and permanent magnet torque, a traditional permanent magnet motor rotor is generally a magnetic pole composed of a plurality of single V-shaped grooves, and the defects of low power density, narrow high-speed constant power range, large torque fluctuation, low overload capacity, poor reliability and the like exist generally, so that the proportion of the permanent magnet torque and the reluctance torque is difficult to meet the use requirements of the new energy automobile, in order to improve the proportion of the permanent magnet torque and the reluctance torque, a high reluctance technology is required to be used, so that the cost and the back electromotive force are reduced, in order to achieve the purposes, a rotor chute or a chute pole is the most commonly used for reducing the torque fluctuation, but the chute and the chute pole have influence on the magnetic induction intensity flat top width of the, and the consumption of the permanent magnet is large, increase production cost, make the stator slot area reduce, reduce and exert oneself, including the stator chute is handled, make production technology and structure complicated, be not convenient for the production and use, the practicality is relatively poor.
At the same time, according to
E0＝ψmW, the lower the back electromotive force requirement control, the lower the breakdown voltage resistance requirement of the controller device and the lower the cost, so that the new energy is achieved by reducing the back electromotive force from the viewpoint of a new energy automobile power systemThe source automobile power assembly has low cost.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model aims at providing a driving motor's rotor refers in particular to a high reluctance permanent magnetism synchronous rotor structure who is arranged in the power assembly of fields such as new energy automobile driving motor, low-speed electric motor car driving motor, servo motor to improve the new energy automobile driving motor that the magnetic resistance torque ratio accounts for than.
Realize above-mentioned purpose, the utility model discloses a technical scheme be: the utility model provides a new energy automobile driving motor's high magnetic resistance permanent magnetism synchronous rotor structure, includes rotor and a plurality of magnet steel of mutually supporting, the rotor is provided with the magnetic pole of the mutual symmetry of a plurality of, and is adjacent polarity between the magnetic pole is opposite, a plurality of the magnetic pole all includes a plurality of open end orientation of constituteing multilayer cell body structure the V-arrangement magnetic steel groove on rotor excircle surface, a plurality of the magnet steel install symmetrically respectively in the V-arrangement magnetic steel groove, a plurality of the magnetic pole all is provided with a plurality of and runs through the rotor excircle surface forms the auxiliary tank of different R footpath breach.
Preferably, V-arrangement magnet steel groove is two at least, and it includes first magnet steel groove and is located first magnet steel inslot side just is close to the second magnet steel groove of rotor excircle department, supplementary groove includes the supplementary breach of first supplementary breach and second, first supplementary breach distribute in first magnet steel groove with between the second magnet steel groove, the supplementary breach of second distribute in the second magnet steel inslot.
Preferably, the auxiliary groove is four at least, including two be R1, R4 respectively first supplementary breach and two be R2, R3 respectively the supplementary breach of second, two first supplementary breach is located respectively both ends tip between first magnet steel groove and the second magnet steel groove, two the supplementary breach of second is set up respectively with a determining deviation in the rotor interval that second magnet steel groove open end covers.
Preferably, the first magnetic steel groove is composed of two permanent magnetic grooves which are not communicated and are symmetrically arranged in a V shape along the magnetic pole axis a, the second magnetic steel groove is composed of two permanent magnetic grooves which are communicated with each other and are symmetrically arranged in a V shape along the magnetic pole axis a, and the V-shaped included angle of the first magnetic steel groove is smaller than the V-shaped included angle of the second magnetic steel groove.
Preferably, the first auxiliary notches R1 and R4 and the second auxiliary notches R2 and R3 are circular arc notches having different R angles and formed by being recessed in the rotor shaft center direction.
Preferably, the outer side of the rotor is sleeved with a stator, and the inner circular surface of the stator and the auxiliary groove on the outer circular surface of the rotor form a non-uniform air gap.
Preferably, the auxiliary grooves are straight grooves which penetrate through the outer circumferential surface of the rotor and are parallel to the axis of the rotor.
The beneficial effects of the utility model embody: the utility model aims at providing a new energy automobile driving motor's high reluctance permanent magnetism synchronous rotor structure, structure through all adopting double-deck V groove in each magnetic pole of rotor is in order to improve salient pole ratio and reluctance torque, realize reducing the quantity of permanent magnet and reduce cost, whole 8 utmost points 36 groove integer groove designs in order to improve the NVH performance, and simultaneously, set up 4 different R footpath circular arc breachs on the rotor excircle of every magnetic pole on the surface, make it and stator form inhomogeneous air gaps, can eliminate the harmonic effectively, and can further reduce torque pulsation and tooth's socket torque under each operating mode, wholly adopt the straight flute to replace traditional chute technology, simplify rotor structure and production technology, effectively reduce production cost, convenient production and assembly, accelerate production efficiency, therefore, the clothes hanger is strong in practicability.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the rotor of the present invention.
Fig. 3 is a schematic view of the cross-sectional structure of the rotor of the present invention.
Fig. 4 is an enlarged schematic structural view of a portion a of fig. 3 of the present invention.
Fig. 5 is a schematic diagram of the torque peak-to-peak value of the straight-slot tooth socket of the present invention.
Fig. 6 is a schematic diagram of the maximum torque waveform and torque ripple according to the present invention.
Reference is made to the accompanying drawings in which:
1-a rotor; 2-magnetic steel; 3-magnetic pole; 4-an auxiliary tank; 5-a first magnetic steel groove; 6-a second magnetic steel groove; 7-a first auxiliary gap; 8-a second auxiliary gap; 9-stator.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
as shown in fig. 1-4, a high magnetic resistance permanent magnet synchronous rotor structure of new energy automobile driving motor, including rotor and a plurality of magnet steel 2 of mutually supporting, the rotor is provided with the magnetic pole 3 of a plurality of mutual symmetry, and is adjacent polarity between the magnetic pole 3 is opposite, a plurality of the magnetic pole 3 all includes a plurality of open end orientation of constituteing multilayer cell body structure the V-arrangement magnet steel 2 groove on rotor excircle surface, a plurality of magnet steel 2 install symmetrically respectively in the V-arrangement magnet steel 2 groove, a plurality of magnet pole 3 all is provided with a plurality of and runs through the rotor excircle surface forms the auxiliary tank 4 of different R footpath breach.
Preferably, V-arrangement magnet steel 2 groove is two at least, and it includes first magnet steel groove 5 and is located 5 inboards of first magnet steel groove and be close to the second magnet steel groove 6 of rotor excircle department, supplementary groove 4 includes supplementary breach 7 of first supplementary breach 7 and second, first supplementary breach 7 distribute in first magnet steel groove 5 with between the second magnet steel groove 6, the supplementary breach 8 of second distribute in the second magnet steel groove 6.
Preferably, the auxiliary grooves 4 are at least four, and include two R1, R4 respectively the first auxiliary gap 7 and two R2, R3 respectively the second auxiliary gap 8, two the first auxiliary gap 7 is located respectively at the both ends tip between the first magnetic steel groove 5 and the second magnetic steel groove 6, two the second auxiliary gap 8 is set up respectively with a certain interval in the rotor interval that the second magnetic steel groove 6 open end covers.
Preferably, the first magnetic steel groove 5 is composed of two permanent magnetic grooves which are not communicated and are symmetrically arranged in a V shape along the axis a of the magnetic pole 3, the second magnetic steel groove 6 is composed of two permanent magnetic grooves which are communicated with each other and are symmetrically arranged in a V shape along the axis a of the magnetic pole 3, and the V-shaped included angle of the first magnetic steel groove 5 is smaller than the V-shaped included angle of the second magnetic steel groove 6.
Preferably, the first auxiliary notches 7R1 and R4 and the second auxiliary notches 8R2 and R3 are circular-arc notches having different R angles and formed by being recessed in the rotor shaft center direction.
Preferably, the outer side of the rotor is sleeved with a stator 9, and the inner circular surface of the stator 9 and the auxiliary groove 4 on the outer circular surface of the rotor form a non-uniform air gap.
Preferably, the auxiliary grooves 4 are straight grooves which penetrate through the outer circumferential surface of the rotor and are parallel to the axis of the rotor.
The utility model relates to a high magnetic resistance permanent magnet synchronous rotor structure of a new energy automobile driving motor, which integrally comprises a rotor and a plurality of magnetic steels 2 arranged on the rotor, wherein, the rotor is optimally but not restrictively provided with eight magnetic poles 3, the eight magnetic poles 3 are symmetrically and uniformly distributed on the rotor along the core part axis of the rotor, the polarities of two adjacent magnetic poles 3 are opposite, each magnetic pole 3 is a double-layer groove body structure, the double-layer groove body structure is specifically composed of double-layer V-shaped magnetic steel 2 grooves to improve salient pole ratio and reluctance torque, thereby reducing the using amount of permanent magnets, reducing cost, increasing reluctance torque ratio, achieving a high magnetic resistance permanent magnet synchronous technical route, the double-layer V-shaped magnetic steel 2 grooves comprise a first magnetic steel groove 5 close to the core part of the rotor and a second magnetic steel groove 6 which is positioned at the inner side of the first magnetic steel groove 5 and close to the outer circle surface of the rotor, the V-shaped open ends of the first magnetic steel groove 5 and the second magnetic steel groove 6 are both towards the outer circle, first magnetic steel groove 5 and second magnetic steel groove 6 all use 3 axis a of magnetic pole to be constructed into bilateral symmetry's structure as the symmetry axis, and wherein, first magnetic steel groove 5 comprises two mutually independent and use 3 axis a of this magnetic pole as the permanent magnet groove of symmetry axis, and second magnetic steel groove 6 then comprises two permanent magnet grooves that communicate each other and use 3 axis a of this magnetic pole as the symmetry axis, all is provided with a plurality of magnet steel 2 that is the V-arrangement symmetry in first magnetic steel groove 5 and second magnetic steel groove 6.
Further, a plurality of auxiliary slots 4 penetrating through the outer circumferential surface of the rotor to form notches with different R diameters are arranged on each magnetic pole 3 of the rotor, the number of the auxiliary slots 4 is optimally but not limited to be four, the four auxiliary slots 4 comprise two first auxiliary notches 7 of R1 and R4 respectively and two second auxiliary notches 8 of R2 and R3 respectively, as shown in fig. 3, the first auxiliary notches 7R1 and R4 are respectively arranged between the first magnetic steel slot 5 and the second magnetic steel slot 6 and close to the two end feet of the outer circumferential surface of the rotor, the second auxiliary notches 8R2 and R3 are respectively arranged in the rotor area covered by the open end of the second magnetic steel slot 6, wherein the second auxiliary notches 8R2 and R3 are respectively distributed at intervals on the inner side close to the two end feet of the second magnetic steel slot 6, and by adopting the design of four circular arcs with different R diameters on each magnetic pole 3, the non-uniform air gap is formed between the rotor and the stator 9 sleeved on the outer side of the rotor, so that different high-order harmonics are weakened, the magnetic field is modulated through R angles at different positions, as shown in fig. 5 and 6, the air gap magnetic density sine is improved, the torque pulsation is reduced, and the peak value of the reverse straight-groove tooth socket torque is +/-0.075 Nm.
Further, the rotor adopts the 3 structures of magnetic pole in double-deck V-arrangement magnet steel 2 groove in order to improve salient pole ratio and reluctance torque, and the efficiency of two kinds of operating modes of big load of balanced low-speed and high-speed light load that this kind of structure can be better simultaneously improves high-efficient area, compares with the structure of traditional high magnetic resistance technical route, more can reduce the permanent magnet quantity to reduce whole more than 20% cost, and can reduce more than 17% back electromotive force.
Furthermore, in order to improve NVH performance, an integral slot design of an eight-pole rotor and a thirty-six slot stator 9 is adopted, a plurality of auxiliary slots 4 on the outer circle surface of the rotor can reduce torque pulsation and cogging torque under various working conditions, the inner diameter of the stator 9 and the auxiliary notches R1, R2, R3 and R4 on the outer circle surface of the rotor form a non-uniform air gap together, high-order harmonics are weakened, and adopts the straight groove design to replace the traditional inclined groove process, greatly simplifies the production process, shortens the production period, improves the production efficiency, the sine degree of the motor is high, so that the air gap magnetic field only contains less higher harmonics, the torque fluctuation of the whole motor in the running process is small, even the uneven air gap design is used, the torque ripple of the even air gap motor which exceeds 20 percent can be reduced to be below 10 percent, the electromagnetic noise is small, the harmonics can be completely weakened, and the design of the controller is simpler.
The above, it is only the preferred embodiment of the present invention, not right the technical scope of the present invention makes any restriction, the technical personnel of the industry, under this technical scheme's enlightenment, can do some deformation and modification, all the basis the utility model discloses a technical essence is to any modification, the equivalent change and the modification of the above embodiment do, all still belong to the technical scheme's scope of the present invention.
Claims (7)
1. The utility model provides a new energy automobile driving motor's high magnetic resistance permanent magnetism synchronous rotor structure, includes rotor and a plurality of magnet steel of mutually supporting, its characterized in that: the rotor is provided with a plurality of mutual symmetrical magnetic poles, and is adjacent polarity between the magnetic pole is opposite, a plurality of the magnetic pole all includes a plurality of open end orientation of constituteing multilayer cell body structure the V-arrangement magnet steel groove on rotor excircle surface, a plurality of the magnet steel install symmetrically respectively in the V-arrangement magnet steel groove, a plurality of the magnetic pole all is provided with a plurality of and runs through the rotor excircle surface forms the auxiliary tank of different R footpath breach.
2. The high-reluctance permanent magnet synchronous rotor structure of the new energy automobile driving motor according to claim 1, characterized in that: v-arrangement magnet steel groove is two at least, and it includes first magnet steel groove and is located first magnet steel inslot side just is close to in the second magnet steel groove of rotor excircle department, supplementary groove includes the supplementary breach of first supplementary breach and second, first supplementary breach distribute in first magnet steel groove with between the second magnet steel groove, the supplementary breach of second distribute in the second magnet steel inslot.
3. The high-reluctance permanent magnet synchronous rotor structure of the new energy automobile driving motor according to claim 2, characterized in that: the auxiliary groove is four at least, includes two and is R1, R4 respectively first supplementary breach and two are R2, R3 respectively the supplementary breach of second, two first supplementary breach is located respectively both ends tip between first magnet steel groove and the second magnet steel groove, two the supplementary breach of second is set up respectively with a determining deviation in the second magnet steel groove open end covers in the rotor interval.
4. The high-reluctance permanent magnet synchronous rotor structure of the new energy automobile driving motor according to claim 2, characterized in that: the first magnetic steel groove is formed by two permanent magnetic grooves which are not communicated and are symmetrically arranged in a V shape along a magnetic pole axis a, the second magnetic steel groove is formed by two permanent magnetic grooves which are communicated with each other and are symmetrically arranged in a V shape along the magnetic pole axis a, and the V-shaped included angle of the first magnetic steel groove is smaller than the V-shaped included angle of the second magnetic steel groove.
5. The high-reluctance permanent magnet synchronous rotor structure of the new energy automobile driving motor according to claim 3, characterized in that: the first auxiliary notches R1 and R4 and the second auxiliary notches R2 and R3 are circular arc notches with different R angles formed by being recessed along the rotor shaft center direction.
6. The high-reluctance permanent magnet synchronous rotor structure of the new energy automobile driving motor according to claim 1, characterized in that: the outer side of the rotor is sleeved with a stator, and the inner circle surface of the stator and the auxiliary groove on the outer circle surface of the rotor form a non-uniform air gap.
7. The high-reluctance permanent magnet synchronous rotor structure of the new energy automobile driving motor according to claim 3, characterized in that: the auxiliary grooves are straight grooves which penetrate through the surface of the outer circle of the rotor and are parallel to the axis of the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020413593.5U CN211579726U (en) | 2020-03-27 | 2020-03-27 | High-reluctance permanent magnet synchronous rotor structure of new energy automobile driving motor |
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| CN202020413593.5U CN211579726U (en) | 2020-03-27 | 2020-03-27 | High-reluctance permanent magnet synchronous rotor structure of new energy automobile driving motor |
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| CN211579726U true CN211579726U (en) | 2020-09-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224486A (en) * | 2020-03-27 | 2020-06-02 | 广东金霸智能科技股份有限公司 | High-reluctance permanent magnet synchronous rotor structure of new energy automobile driving motor |
| CN112953058A (en) * | 2021-02-18 | 2021-06-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure and permanent magnet auxiliary synchronous reluctance motor |
-
2020
- 2020-03-27 CN CN202020413593.5U patent/CN211579726U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224486A (en) * | 2020-03-27 | 2020-06-02 | 广东金霸智能科技股份有限公司 | High-reluctance permanent magnet synchronous rotor structure of new energy automobile driving motor |
| CN112953058A (en) * | 2021-02-18 | 2021-06-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure and permanent magnet auxiliary synchronous reluctance motor |
| CN112953058B (en) * | 2021-02-18 | 2024-06-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure and permanent magnet auxiliary synchronous reluctance motor |
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