CN205070734U - High magnetic resistance utilization ratio PMSM - Google Patents
High magnetic resistance utilization ratio PMSM Download PDFInfo
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- CN205070734U CN205070734U CN201520736520.9U CN201520736520U CN205070734U CN 205070734 U CN205070734 U CN 205070734U CN 201520736520 U CN201520736520 U CN 201520736520U CN 205070734 U CN205070734 U CN 205070734U
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Abstract
The utility model relates to a high magnetic resistance utilization ratio PMSM, including stator core (1) and rotor, the rotor includes rotor core (4) and inlays the magnet steel group on rotor core (4), wherein: magnet steel group is officious announcement set up in the circumferential edge of rotor core (4) is along the department, magnet steel group includes little magnet steel group (2) and big magnet steel group (3), little magnet steel group (2) and big magnet steel group (3) are the V -arrangement structure, the circumferential edge reason of more being close to rotor core (4) in big magnet steel group (3) is compared in little magnet steel group (2), the quantity of little magnet steel group (2) equals the motor number of pole -pairs, the quantity of big magnet steel group (3) is the half the of little magnet steel group (2). The utility model discloses gathering the magnetism effect, obvious and to gather the magnetic action polar arc controllable, is favorable to improving the power density that back -emf sine degree improves the motor simultaneously, save the magnet steel quantity under the same moment of torsion and power. This technique specially adapted new energy automobile driving motor field.
Description
Technical field
The utility model relates to technical field of motors, is specifically related to a kind of high magnetic resistance utilance permagnetic synchronous motor.
In recent years, along with the rise of new-energy automobile industry, vehicle traction motor requires more and more higher to the peak torque of motor and the range of speeds background, and reduce system cost to meet overall dimensions of a car space, system wishes that motor possesses larger reluctance torque share.According to investigations: the share ratio that the salient pole reluctance torque of current domestic and international each heavy motor company development motor and permanent magnetic steel produce moment of torsion is generally less than 45%; If this ratio can be improved further, effectively can reduce system cost, improve the matching degree of motor power performance and system.In hybrid electric vehicle system, space anxiety, more and more harsher to power of motor density requirements, the power of motor torque density that just waiting in expectation can improve further.Further situation also has, universal along with industrial servo and vehicle electrical driving rate, require that motor has lower cost, and rare earth magnetic steel is as the critical material resource-constrained affecting motor cost.If rare earth can be substituted with ferrite can realize industry long term growth.
In order to energy savings, reduce carbon emission, permanent-magnet synchronous scheme selected by increasing motor at present.But according to Electrical Motor: general permagnetic synchronous motor, comprise stator punching 1-1, tile-shaped magnet steel 1-2, rotor punching 1-3 and duplicate removal hole 1-4 as shown in Figure 1, the permagnetic synchronous motor output torque of this kind of structure is proportional to operating current and the back emf coefficient of motor, and its working speed is inversely proportional to back emf coefficient.In addition, permagnetic synchronous motor needs to adopt special controller to operate continuously, when permagnetic synchronous motor has wide speed regulating range service requirement, engineering often runs into controller current drive capability deficiency or device proof voltage (the unloaded back-emf voltage particularly during motor maximum speed) problem that ability is inadequate.Therefore in order to take into account wide speed range and the power performance of motor.Generally this kind of motor is all adopted Interior permanent magnet formula rotor structure, tile-shaped magnet steel 1-2 before adopting square magnetic steel 2-2 to replace as shown in Figure 2 in a kind of permagnetic synchronous motor, secondly rely on the feature of embedded magnetic steel rotor motor quadrature axis inductance L q > d-axis inductance L d to produce salient pole reluctance torque, the output torque realizing motor is greater than the product of electric current and back emf coefficient.
Publication number CN104011974 patent discloses a kind of rotor, can play and increases reluctance torque thus realize the high effect exported.But obviously this motor is not done to consider on volume, cost, power density still has room for promotion simultaneously.
Utility model content
Goal of the invention of the present utility model is: for the above-mentioned technical problem existed in prior art, provides a kind of more high power density, the more wide speed regulating range high magnetic resistance utilance permagnetic synchronous motor that cost is lower simultaneously.
The technical solution adopted in the utility model is such: a kind of high magnetic resistance utilance permagnetic synchronous motor, comprise stator core 1 and rotor, the magnet steel group that described rotor comprises rotor core 4 and is embedded on rotor core 4, wherein: the non-homogeneous circumferential edges place being arranged at described rotor core 4 of described magnet steel group, described magnet steel group comprises little magnet steel group 2 and large magnet steel group 3, described little magnet steel group 2 and large magnet steel group 3 are v-shaped structure, and described little magnet steel group 2 is compared to the circumferential edges of large magnet steel group 3 closer to rotor core 4; The quantity of described little magnet steel group 2 equals motor number of pole-pairs, and the quantity of described large magnet steel group 3 is the half of little magnet steel group 2.
Further, described little magnet steel group 2 and large magnet steel group 3 are alternately distributed with rotor N, S pole.
Further, described rotor N pole has two-layer magnet steel group, and it is respectively little magnet steel group 2 and large magnet steel group 3; Described S pole has the little magnet steel group 2 of one deck.
Further, described rotor S pole has two-layer magnet steel group, and it is respectively little magnet steel group 2 and large magnet steel group 3; Described N pole has the little magnet steel group 2 of one deck.
Further, the magnetic line of force of described little magnet steel group 2 and the magnetic line of force series connection of large magnet steel group 3.。
Further, the polar arc c2 of described large magnet steel group 3 equals rotor polar distance; Between the polar arc c1 of described little magnet steel group 2 is 0.5 ~ 0.65 times of polar arc c2.
Further, described large magnet steel group 3 is provided with air groove by the two ends outside rotor core 4, and the both sides of described air groove are parallel with q axle.
Further, being magnetic bridge a2 between the air groove of described large magnet steel group 3 and the edge of rotor core 4, is magnetic bridge a1 between the two ends of described little magnet steel group 2 and the edge of rotor core 4; The thickness of described magnetic bridge a2 is 1 ~ 3 times of magnetic bridge a1.
Further, the magnet steel distance b2 between described little magnet steel group 2 and large magnet steel group 3 is 0.83 ~ 1.25 times of the spacing b1 of large magnet steel group 3 air groove and little magnet steel group 2 air groove.
Further, described rotor core 4 is provided with several duplicate removal holes 5, and is positioned at the outside of little magnet steel group 2, and described duplicate removal hole 5 is triangle or trapezium structure.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, structure of the present utility model is simple, and easily produce, cost is low, and easily uses popularization;
2, the utility model rotor adopts embedded structure, inscribe magnet steel in the core which adopts uneven magnet steel to arrange simultaneously, motor is made to produce larger moment of torsion under identical size, phase current and back-emf, or the back-emf that demand is lower under identical size, phase current and moment of torsion, so can effectively improve motor controllability; Poly-magnetic successful and magnet accumulating cap polar arc is controlled, is conducive to improving the power density that sine degree of back electromotive force improves motor simultaneously; Magnet steel consumption is saved under identical moment of torsion and power.This technology is specially adapted to new-energy automobile drive motors field;
3, the epitrochanterian flux circuit of the utility model is effectively widened, and therefore increase effectively the quadrature axis inductance of motor;
4, during the utility model empty load of motor, stator core is only subject to the effectively excitatory of little magnet steel group place rotor pole arc, and its magnetizing flux amount is less, and empty load of motor back-emf and magnetic flux are directly proportional, and therefore the unloaded back-emf of motor is lower;
5, the utility model motor is when load, the relative no-load magnetic field of the magnetic line of force in motor stator core becomes very dense, most of magnetic line of force of large magnet steel group 3 have passed through air gap through stator core, and become load from the leakage field of zero load and increase magnetic, therefore during load, the magnetic flux polar arc of motor obviously increases.
Accompanying drawing explanation
The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the permagnetic synchronous motor schematic diagram one of prior art;
Fig. 2 is the permagnetic synchronous motor schematic diagram two of prior art;
Fig. 3 is partial schematic diagram one of the present utility model;
Fig. 4 is partial schematic diagram two of the present utility model;
Fig. 5 is rotor schematic diagram of the present utility model;
Fig. 6 is empty load of motor magnetic field of the present utility model design sketch;
Fig. 7 is motor load magnetic circuit simulation figure of the present utility model;
Fig. 8 is the partial enlarged drawing of the utility model motor load magnetic circuit simulation figure.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Specific embodiment, as shown in Figures 3 and 4, a kind of high magnetic resistance utilance permagnetic synchronous motor, comprise stator core 1 and rotor, the magnet steel group that described rotor comprises rotor core 4 and is embedded on rotor core 4, wherein: the non-homogeneous circumferential edges place being arranged at described rotor core 4 of described magnet steel group, described magnet steel group comprises little magnet steel group 2 and large magnet steel group 3, described little magnet steel group 2 and large magnet steel group 3 are v-shaped structure, and described little magnet steel group 2 is compared to the circumferential edges of large magnet steel group 3 closer to rotor core 4; The quantity of described little magnet steel group 2 equals motor number of pole-pairs, and the quantity of described large magnet steel group 3 is the half of little magnet steel group 2.
Particularly, described little magnet steel group 2 and large magnet steel group 3 are alternately distributed with rotor N, S pole.
Particularly, described rotor S pole has two-layer magnet steel group, and it is respectively little magnet steel group 2 and large magnet steel group 3; Described N pole has the little magnet steel group 2 of one deck.
Particularly, the magnetic line of force of described little magnet steel group 2 and the magnetic line of force series connection of large magnet steel group 3.
Particularly, the polar arc c2 of described large magnet steel group 3 equals rotor polar distance; The polar arc c1 of described little magnet steel group 2 is 0.6 times of polar arc c2.
Particularly, described large magnet steel group 3 is provided with air groove by the two ends outside rotor core 4, and the both sides of described air groove are parallel with q axle.
Particularly, being magnetic bridge a2 between the air groove of described large magnet steel group 3 and the edge of rotor core 4, is magnetic bridge a1 between the two ends of described little magnet steel group 2 and the edge of rotor core 4; The thickness of described magnetic bridge a2 is 1.5 times of magnetic bridge a1.
Particularly, the magnet steel distance b2 between described little magnet steel group 2 and large magnet steel group 3 is 1 times of the spacing b1 of large magnet steel group 3 air groove and little magnet steel group 2 air groove.
Particularly, described rotor core 4 is provided with several duplicate removal holes 5, and is positioned at the outside of little magnet steel group 2, and described duplicate removal hole 5 is trapezium structure.
As shown in Figure 5, enough distances are left between epitrochanterian large magnet steel group 3 and little magnet steel group 2, the passage 1 that the magnetic cross flux produced for stator 1 can consist of the edge of little magnet steel group 2 and rotor core 4 and little magnet steel group 2 and the passage 27 formed between magnet steel group 3 greatly, and the passage 38 formed between little magnet steel group 2 and duplicate removal hole 5 penetrates rotor core 4 and forms armature reaction loop, compare the embedded magnetic steel structure of traditional V-arrangement (shown in Fig. 2) this flux circuit effectively to widen, therefore increase effectively the quadrature axis inductance of motor.
As shown in Figure 6, magnetic field effect during empty load of motor work.It is excitatory that stator 1 is only subject to rotor magnetic steel, and most of magnetic line of force of large magnet steel group 3 and the magnetic line of force series connection of little magnet steel group 2 are carried out effectively excitatory to stator, all the other magnetic fluxs form leakage field by rotor core 4, do not produce excitatory to the stator of motor.Therefore during empty load of motor, stator core is only subject to the effectively excitatory of little magnet steel group place rotor pole arc c1, and its magnetizing flux amount is less, and empty load of motor back-emf and magnetic flux are directly proportional, and therefore the unloaded back-emf of motor is lower.
From Fig. 3 and 5, due to the arrangement of special magnet steel, the quadrature axis inductance of motor is increased, d-axis inductance reduces.Be directly proportional according to the reluctance torque of the known motor of permanent magnet motor principle and the ac-dc axis inductance difference of motor, this magnetic structure possesses the condition that large reluctance torque exports.In addition it is obvious that special magnetic structure armature when loaded work piece increases magnetic, increase magnetic effect as shown in FIG. 7 and 8, motor is when load, the relative no-load magnetic field of the magnetic line of force in stator 1 becomes very dense, most of magnetic line of force of large magnet steel group 3 have passed through air gap through stator 1, become load from the leakage field of zero load and increase magnetic, therefore during load, the magnetic flux polar arc of motor obviously increases (emulation magnetic flux result is than time unloaded being increase 1.2 times).And the magnetic line of force in air-gap field obviously offsets to a direction, torsional interaction power is consistent, magnetic resistance is obvious.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. one kind high magnetic resistance utilance permagnetic synchronous motor, comprise stator core (1) and rotor, the magnet steel group that described rotor comprises rotor core (4) and is embedded on rotor core (4), it is characterized in that: the non-homogeneous circumferential edges place being arranged at described rotor core (4) of described magnet steel group, described magnet steel group comprises little magnet steel group (2) and large magnet steel group (3), described little magnet steel group (2) and large magnet steel group (3) are v-shaped structure, described little magnet steel group (2) is compared to the circumferential edges of large magnet steel group (3) closer to rotor core (4), the quantity of described little magnet steel group (2) equals motor number of pole-pairs, and the quantity of described large magnet steel group (3) is the half of little magnet steel group (2).
2. high magnetic resistance utilance permagnetic synchronous motor according to claim 1, is characterized in that, described little magnet steel group (2) and large magnet steel group (3) are alternately distributed with rotor N, S pole.
3. high magnetic resistance utilance permagnetic synchronous motor according to claim 2, is characterized in that, described rotor N pole has two-layer magnet steel group, and it is respectively little magnet steel group (2) and large magnet steel group (3); Described S pole has the little magnet steel group (2) of one deck.
4. high magnetic resistance utilance permagnetic synchronous motor according to claim 2, is characterized in that, described rotor S pole has two-layer magnet steel group, and it is respectively little magnet steel group (2) and large magnet steel group (3); Described N pole has the little magnet steel group (2) of one deck.
5. high magnetic resistance utilance permagnetic synchronous motor according to claim 1, is characterized in that, the magnetic line of force of described little magnet steel group (2) and the magnetic line of force series connection of large magnet steel group (3).
6. the high magnetic resistance utilance permagnetic synchronous motor according to claim 3 or 4, is characterized in that, the polar arc c2 of described large magnet steel group (3) equals rotor polar distance; Between the polar arc c1 of described little magnet steel group (2) is 0.5 ~ 0.65 times of polar arc c2.
7. high magnetic resistance utilance permagnetic synchronous motor according to claim 1, is characterized in that, described large magnet steel group (3) is provided with air groove by the two ends in rotor core (4) outside, and the both sides of described air groove are parallel with q axle.
8. the high magnetic resistance utilance permagnetic synchronous motor according to claim 1 or 7, it is characterized in that, being magnetic bridge a2 between the air groove of described large magnet steel group (3) and the edge of rotor core (4), is magnetic bridge a1 between the two ends of described little magnet steel group (2) and the edge of rotor core (4); The thickness of described magnetic bridge a2 is 1 ~ 3 times of magnetic bridge a1.
9. high magnetic resistance utilance permagnetic synchronous motor according to claim 1, it is characterized in that, the magnet steel distance b2 between described little magnet steel group (2) and large magnet steel group (3) is 0.83 ~ 1.25 times of the spacing b1 of large magnet steel group (3) air groove and little magnet steel group (2) air groove.
10. high magnetic resistance utilance permagnetic synchronous motor according to claim 1, it is characterized in that, described rotor core (4) is provided with several duplicate removal holes (5), and being positioned at the outside of little magnet steel group (2), described duplicate removal hole (5) is triangle or trapezium structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520736520.9U CN205070734U (en) | 2015-09-14 | 2015-09-14 | High magnetic resistance utilization ratio PMSM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520736520.9U CN205070734U (en) | 2015-09-14 | 2015-09-14 | High magnetic resistance utilization ratio PMSM |
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| Publication Number | Publication Date |
|---|---|
| CN205070734U true CN205070734U (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520736520.9U Expired - Fee Related CN205070734U (en) | 2015-09-14 | 2015-09-14 | High magnetic resistance utilization ratio PMSM |
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| Country | Link |
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| CN (1) | CN205070734U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639001A (en) * | 2018-12-28 | 2019-04-16 | 苏州英磁新能源科技有限公司 | A kind of rotor for synchronous magnetic resistance motor |
-
2015
- 2015-09-14 CN CN201520736520.9U patent/CN205070734U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639001A (en) * | 2018-12-28 | 2019-04-16 | 苏州英磁新能源科技有限公司 | A kind of rotor for synchronous magnetic resistance motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20210914 |
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| CF01 | Termination of patent right due to non-payment of annual fee |