CN105337434A - Hybrid excitation permanent magnet brushless motor for electric vehicle - Google Patents
Hybrid excitation permanent magnet brushless motor for electric vehicle Download PDFInfo
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- CN105337434A CN105337434A CN201510751940.9A CN201510751940A CN105337434A CN 105337434 A CN105337434 A CN 105337434A CN 201510751940 A CN201510751940 A CN 201510751940A CN 105337434 A CN105337434 A CN 105337434A
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Abstract
The invention discloses a hybrid excitation permanent magnet brushless motor for an electric vehicle. A rotor is internally embedded with an inner layer of permanent magnetic steels and an outer layer of permanent magnetic steels distributed uniformly along the circumferential direction; V-type NdFeB permanent magnetic steels are in the outer layer; spoke-shaped ferrite permanent magnetic steels are in the inner layer; the two kinds of permanent magnetic steels are located on the same pole; the NdFeB permanent magnetic steels and the ferrite permanent magnetic steels are symmetrical about the central axis of the pole; the V-type openings of the NdFeB permanent magnetic steels face the ferrite permanent magnetic steels; each NdFeB permanent magnetic steel is composed of a first NdFeB permanent magnetic steel and a second NdFeB permanent magnetic steel which are the same and are symmetrical about the central axis of the pole; and the top parts of the V-type openings of the NdFeB permanent magnetic steels and the outer ends of the ferrite permanent magnetic steels are directly fixedly connected. by adopting a rare earth permanent magnetic steel and ferrite hybrid excitation mode, parallel connection of the two kinds of permanent magnetic steel main magnetic circuits is realized, and torque density and power density of the motor are further improved.
Description
Technical field
The invention belongs to technical field of motor manufacture, refer in particular to a kind of permanent magnetic brushless being suitable for the application scenarios such as electric automobile and needing high torque density, high power density, the requirement of high efficiency driveability.
Background technology
High-performance permanent magnet brushless motor relies on the advantages such as small size, high torque density, high power density, high efficiency, good dynamic response to be successfully applied in the drive system of automobile.But because the rare earth permanent-magnetic material price in permanent magnetic brushless constantly rises, supply chain is more and more unstable, and the development of permanent magnetic brushless is subject to serious obstruction.In order to the manufacturing cost reducing motor in the torque output situation not affecting motor becomes study hotspot instantly, non-terres rares motor and hybrid excitation class motor are there is.
1) non-terres rares motor.Consider that ferrite has the advantages such as cheap, manufacturing process is simple, coercive force is large, anti-degaussing ability is stronger, Ferrite Material is extensively adopted to replace rare earth permanent-magnetic material at present, and due to Ferrite Material residual flux density not high, maximum magnetic energy product is less, the rotor structure of general use spoke-like to increase permanent-magnet torque, thus reduces the gap between non-terres rares motor and terres rares motor performance as much as possible.Patent Chinese Patent Application No. is propose a kind of 8 pole 9 groove trapezoidal ferrite excitation magneto in the document of 201120445225.X, the embedded magnetism-collected structure of this multipole drastically increases the air gap flux density of motor, thus meets the requirement of high power and high torque (HT).And burst rotor structure effectively eliminates magnetic bridge leakage field especially, further increase the Driving Torque of motor, realize ferrite motor and to reach or close to the identical torque output capability of surface-mount type rare-earth permanent-magnet electric machine.But, because ferritic consumption and volume are comparatively large, will inevitably increase the volume of motor, thus the torque of this kind of non-terres rares motor and power density are reduced to some extent; Ferrite Material is very easily by irreversible degaussing, and the end of magnet needs to use extra non-magnet material to protect, and makes this motor inevitably cause the complicated of structure, and manufactures the increase of difficulty of processing and cost; And burst rotor structure limits running up of motor to a certain extent, also improve the difficulty of assembling.Chinese Patent Application No. is propose a kind of Magneticflux-switching type built-in type permanent-magnet memory electrical machine in the document of 201310149285.0, by being combined with DC magnetization winding by the non-rare earth Al-Ni-Co permanent magnet magnet steel with online adjustable magnetic characteristic, effectively improve Driving Torque and the power output of motor.Magnetizing current or pulsed magnetizing current in short-term is only needed because alnico magnet magnetizes online, magnetizing current action time very short (being only Millisecond), substantially reduce the electric excitation copper loss needed for flux control, thus effectively improve the operational efficiency of motor in weak magnetic area.But such motor is owing to adding flux control winding, need extra inner space to place such winding, this makes the volume of such motor comparatively large, and torque and power density decrease.In addition, such motor-field on-line control and control also need extra magnetization winding inverter, and electric machine control system cost and complexity also increase thereupon.
2) hybrid excitation class motor.Being integrated with the mixed excitation electric machine of electric excitation winding, by regulating the size and Orientation of electricity excitation magnetic field to regulate air-gap field, thus achieving wider speed adjustable range and high power, high efficiency output performance.Chinese Patent Application No. is propose a kind of mixed excitation electric machine in the document of 201510095867.4, this motor uses the mode of the common excitation of less magnet steel, excitation winding to replace a certain pole of magneto originally, thus achieves the reduction of larger speed adjustable range, less rare earth use amount and cost by adjustment exciting current.Chinese Patent Application No. is propose a kind of rotor with salient pole formula mixed excitation electric machine based on magnetic gear in the document of 201410257708.5, motor-field is produced with the excitation winding be wound on stator tooth by the permanent magnetic steel being affixed on stator surface, improve the reliability of motor on the one hand, also improve the nonadjustable defect in conventional permanent magnet motor magnetic field on the other hand, there is the advantage that low speed increases magnetic, the weak magnetic of high speed.But in the structure of the first shunt excitation formula, due to the existence of axial magnetic circuit, stator and rotor back yoke needs to increase the good electrical pure iron of magnetic property, and structure is comparatively complicated, manufactures, installs also relative difficulty; And in the structure of the second series excitation formula, the magnetic circuit of electric excitation is through permanent magnetic steel, magnetic circuit reluctance is larger, make exciting current comparatively large, copper loss increases, simultaneously, electricity excitation magnetic kinetic potential directly acts on permanent magnetic steel, adds the risk of its irreversible demagnetization, also reduces the reliability of motor.
Therefore, while minimizing rare earth permanent-magnetic material consumption, how obtaining rational in infrastructure, high torque density, high power density permanent magnetic brushless becomes problem demanding prompt solution in current permanent magnetic brushless field.
Summary of the invention
The object of the invention is for solving the problems such as rare earth permanent-magnetic material cost is high, supply is unstable, providing that a kind of structure is simple, reliability is high, there is high torque (HT), the hybrid excitation permanent magnetic brushless used for electric vehicle of high power density.
For achieving the above object, the technical solution used in the present invention is: the present invention includes stator, rotor and rotating shaft, rotor coaxial is positioned at stator interior, the center of rotor is used for laying rotating shaft, stator is by stator tooth, stator slot and stator yoke composition, stator slot is formed between adjacent two stator tooths, armature is around being arranged in stator slot, internal rotor is embedded with the inside and outside two-layer permanent magnetic steel be along the circumferential direction evenly arranged, skin is the Nd-Fe-B permanent magnetic magnet steel of V-type, internal layer is the ferrite permanent-magnet magnet steel of spoke-like, two kinds of permanent magnetic steels are positioned at samely extremely to be gone up, Nd-Fe-B permanent magnetic magnet steel and the ferrite permanent-magnet magnet steel pole central shaft all about pole, place is symmetrical, the V-type opening of Nd-Fe-B permanent magnetic magnet steel is towards ferrite permanent-magnet magnet steel, each Nd-Fe-B permanent magnetic magnet steel is made up of about the pole central shaft of pole, place is symmetrical the first identical Nd-Fe-B permanent magnetic magnet steel and the second Nd-Fe-B permanent magnetic magnet steel, and the V-type open top of described Nd-Fe-B permanent magnetic magnet steel and the outer end of ferrite permanent-magnet magnet steel are directly fixedly linked, Nd-Fe-B permanent magnetic magnet steel in two neighboring pole tangentially alternately magnetizes, and the ferrite permanent-magnet magnet steel in two neighboring pole also tangentially alternately magnetizes, and the Nd-Fe-B permanent magnetic magnet steel on homopolarity is consistent with the magnetizing direction of ferrite permanent-magnet magnet steel.
Further, rotor outer circle is uniform-distribution with triangular notch, triangular notch number equals the number of poles of motor, on the axis being centrally located between two neighboring pole of triangular notch;
The outer edge of Nd-Fe-B permanent magnetic magnet steel 3 has semicircle magnetic barrier;
Radial width is had between described Nd-Fe-B permanent magnetic magnet steel outward flange and rotor outward flange;
Armature winding becomes the centralized arrangement of modularization fractional-slot, and every phase winding concentrates in together, and each winding technique, on stator tooth, forms double-decker in stator slot.
The beneficial effect that the present invention has after adopting technique scheme is:
1, the present invention adopts the mode of thulium permanent magnet and ferrite combination excitation, wherein thulium permanent magnet adopts V-type magnetism-collected structure to improve air gap flux density peak value, ferrite adopts spoke-like structure to improve permanent-magnet torque, these two kinds of permanent magnetic steels all adopt alternately cutting orientation magnetizing mode, thus achieve the parallel connection of two kinds of permanent magnetic steel main magnetic circuits, further increase torque density and the power density of this few rare earth permanent magnet brushless motor, minimizing thulium permanent magnet consumption with the basis reduced costs enable to compare favourably with the torque output capability of rare earth permanent magnet brushless motor.
2, the present invention adopts the structure that thulium permanent magnet is directly connected with ferrite end, thus achieve the series connection on two kinds of permanent magnetic steel brow leakage roads, so just can omit thulium permanent magnet inner boundary every magnetic measure, and the anti-degaussing measure of ferrite external boundary nonmagnetic substance, decrease the difficulty of motor processing and manufacturing; And because leakage field is fully used, effective permanent magnet flux linkage that hybrid excitation magnet steel produces increases, and torque output capability is promoted; In addition, because thulium permanent magnet is not easily by weak magnetic, in series circuit, the working point of ferrite external boundary is higher, can reduce to a great extent by the risk of irreversible degaussing, improve the reliability of motor of the present invention.
3, the present invention adopt thulium permanent magnet outside, ferrite is at interior rotor structure, thus ferritic consumption can be increased as much as possible, improve the torque output capability of motor, also taking full advantage of the inner space of motor, improving conventional internal formula permagnetic synchronous motor to reduce leakage field and the drawback of wasting space in rotating shaft.
4, the present invention adopts non-magnetic salient pole type pivot structure, effectively can reduce the leakage field of ferrite inner boundary.
5, the present invention is by adopting the measure of slotting on outer circle of motor rotor, has effectively filtered part low-order harmonic, has reduced the cogging torque of motor.
6, stator of the present invention adopts the centralized winding of modularization fractional-slot, be conducive to increasing d-axis inductance further, increase the weak magnetic of motor and wide range speed control serviceability.Also can reduce alternate mutual inductance simultaneously, increase the reliability of fault-tolerant ability and raising motor.
Accompanying drawing explanation
Fig. 1 is the radial section structural representation of the present invention's hybrid excitation permanent magnetic brushless used for electric vehicle;
Fig. 2 is the close-up schematic view of stator in Fig. 1;
Fig. 3 is that in Fig. 1, stator armature winding is modularization centralized formula connected mode schematic diagram;
Fig. 4 is partial structurtes and the physical dimension mark enlarged diagram of Fig. 1 rotor;
Fig. 5 is structure and the physical dimension mark enlarged diagram of magnet steel 3 in Fig. 1 rotor;
Fig. 6 is structure and the physical dimension mark enlarged diagram of magnet steel 4 in Fig. 1 rotor;
Fig. 7 is that in rotor of the present invention, magnet steel magnetizes schematic diagram;
Fig. 8 is the magnetic flux schematic diagram of magnet steel in rotor of the present invention;
Fig. 9 is no-load magnetic field distribution map of the present invention;
Figure 10 is the torque-speed performance comparison figure of the present invention and conventional internal formula permagnetic synchronous motor;
Figure 11 is the power-rate performance comparison diagram of the present invention and conventional internal formula permagnetic synchronous motor.
In figure: 1. stator; 2. rotor; 3. Nd-Fe-B permanent magnetic magnet steel; 4. ferrite permanent-magnet magnet steel; 5. magnetic barrier; 6. triangular notch; 7. stator yoke; 8. stator slot; 9. stator tooth; 10. rotating shaft; 11,12,13,14,15,16,17,18,19,20,21,22. armature winding; 31. first Nd-Fe-B permanent magnetic magnet steel; 32. second Nd-Fe-B permanent magnetic magnet steel.
Embodiment
See Fig. 1, the present invention is a kind of few rare earth hybrid excitation wide range speed control permanent magnetic brushless, adopts outer stator structure, comprises stator 1, rotor 2 and rotating shaft 10.It is inner that rotor 2 is coaxially positioned at stator 1, and the center of rotor 2 is used for laying rotating shaft 10.Have air gap between stator 1 inwall and rotor 2 outer wall, the thickness of air gap is processed relevant with assembly technology with the power grade of motor, selected permanent magnetic material and stator 1, rotor 2.Stator 1 and rotor 2 are all formed by the silicon steel plate stacking of 0.35mm thickness, and stacking factor is 0.95.
Rotor 2 inside is embedded with inside and outside two-layer permanent magnetic steel, this inside and outside two-layer permanent magnetic steel is along the circumferential direction evenly arranged, skin is the Nd-Fe-B permanent magnetic magnet steel 3 of V-type, internal layer is the ferrite permanent-magnet magnet steel 4 of irregular spoke-like, two kinds of permanent magnetic steels are positioned at samely extremely to be gone up, Nd-Fe-B permanent magnetic magnet steel 3 and ferrite permanent-magnet magnet steel 4 are symmetrical about the pole central shaft of pole, place, and when Nd-Fe-B permanent magnetic magnet steel 3 embeds, leave certain radial width between Nd-Fe-B permanent magnetic magnet steel 3 outward flange and rotor 2 outward flange.Rotor 2 cylindrical is uniform-distribution with triangular notch 6, and number equals the number of poles of motor, and being centrally located on the axis of two neighboring pole of triangular notch 6.
See Fig. 2, stator 1 is made up of stator tooth 9, stator slot 8, stator yoke 7.Form stator slot 8 between adjacent two stator tooths 9, armature is around being arranged in stator slot 8.Stator tooth 9 radial cross-section is approximately T-shaped, and T-shaped top is near rotor 2, and T-shaped bottom and stator yoke 7 are connected as a single entity.The facewidth note t at the radial center place of stator tooth 9
9, the radial width of stator yoke 7 is y
7, in order to prevent the saturation effects of stator yoke 7 and make full use of magnetic circuit space, require t
9≈ 2y
7.Armature winding is laid in stator slot 8.
See Fig. 2 and Fig. 3, wherein "+" inlet wire direction that is armature winding, the outlet direction that "-" is armature winding, A, B, C are motor three-phase windings.Motor of the present invention contains 12 grooves, armature winding 11,12,13,14,15,16,17,18,19,20,21, the centralized arrangement of 22 one-tenth following modularization fractional-slots: A+A-B+B-B-B++C-C+C+C-A+A-A-A+B-B+B+B-C+C-C-C+A-A+.Wherein every phase winding concentrates in together, and each winding technique is on stator tooth 9, in stator slot 8, form double-decker.
See Fig. 4, the Nd-Fe-B permanent magnetic magnet steel 3 of the outer field V-type that rotor 2 is inlayed is near air gap, and the ferrite permanent-magnet magnet steel 4 of the spoke-like of internal layer is near rotating shaft 10.The V-type opening of Nd-Fe-B permanent magnetic magnet steel 3 is towards ferrite permanent-magnet magnet steel 4, the external boundary of Nd-Fe-B permanent magnetic magnet steel 3 is bottom V-type, the outer edge of Nd-Fe-B permanent magnetic magnet steel 3 has semicircle magnetic barrier (or air gap) 5, in order to reduce the leakage field of Nd-Fe-B permanent magnetic magnet steel 3 external boundary.Rotating shaft 10 adopts salient-pole structure, thus reduces the leakage field of ferrite permanent-magnet magnet steel 4 inner boundary; The inner of Nd-Fe-B permanent magnetic magnet steel 3 is V-type open top, is directly fixedly linked with the outer end of ferrite permanent-magnet magnet steel 4.Two kinds of permanent magnetic steels are uniformly distributed around spindle central point o.Wherein, the external diameter of rotor 2 is R
2o, the internal diameter of rotor 2 is R
2i, in order to match with standard rotating shaft and ensure to make full use of the inner space of motor, demand fulfillment 15mm≤R
2i≤ 0.25R
2o.The distance of triangular notch 6 top and center of circle o is R
6, triangle angle of release is 2 θ
6, consider the reasonability of motor, meeting 0.9R
2o≤ R
6< R
2owith 0 ° of < θ
6when < 0.25 θ (θ is rotor pole arc), by motor performance optimum option optimal value.
See Fig. 5, the Nd-Fe-B permanent magnetic magnet steel 3 of each V-type is made up of about the pole central shaft of pole, place is symmetrical the first Nd-Fe-B permanent magnetic magnet steel 31 and the second Nd-Fe-B permanent magnetic magnet steel 32, first Nd-Fe-B permanent magnetic magnet steel 31 is identical with the structure of second these two Nd-Fe-B permanent magnetic magnet steel of Nd-Fe-B permanent magnetic magnet steel 32, and the angle between the first Nd-Fe-B permanent magnetic magnet steel 31 and the second Nd-Fe-B permanent magnetic magnet steel 32 is θ
3, the width of the first Nd-Fe-B permanent magnetic magnet steel 31 and the second Nd-Fe-B permanent magnetic magnet steel 32 is all w
3, thickness is all h
3, in order to ensure the reasonability of electric machine structure, and improve the torque output capability of motor and increase d-axis inductance, need satisfy condition 25 °≤θ
3≤ 30 °, 0 < w
3< 0.25R
2o, w
3× h
3=30.8mm
2(consumption of two Nd-Fe-B permanent magnetic magnet steel is definite value); Beeline between two Nd-Fe-B permanent magnetic magnet steel and the axis, pole of its pole, place is x
3, in order to ensure the mechanical strength of silicon steel sheet and reduce leakage field as far as possible, need satisfy condition 1mm≤x
3≤ 2mm; Nd-Fe-B permanent magnetic magnet steel 31 is y apart from the longest distance of the center of circle o of machine shaft 10
3, consider that rotor external boundary and magnetic hinder the mechanical strength of silicon steel sheet between 5 and reduces leakage field as far as possible, need satisfy condition 0.8R
2o< y
3< R
2o-0.5h
3-2mm.
See Fig. 6, the beeline between ferrite permanent-magnet magnet steel 4 and center of circle o is x
4, in order to while leaving enough spaces to salient pole rotating shaft 10, improve the consumption of ferrite permanent-magnet magnet steel 4 to improve the torque output capability of motor, need satisfy condition R
2i< x
4< 1.5R
2i; Beeline between on the axis of ferrite permanent-magnet magnet steel 4 to two neighboring pole is y
4, in order to ensure the mechanical strength of silicon steel sheet between adjacent two blocks of ferrite permanent-magnet magnet steel 4 and reduce leakage field, need satisfy condition 1mm≤y
4≤ 2mm; The inner length diametrically of ferrite permanent-magnet magnet steel 4 is h
4, in order to torque output capability is improved in the inner space making full use of motor, and ensure the mechanical strength of electric mach reasonability and silicon steel sheet, need satisfy condition 0mm < h
4< 0.5 (R
2o-x
4).
See Fig. 7, Nd-Fe-B permanent magnetic magnet steel 3 in two neighboring pole adopts the mode that alternately magnetizes, ferrite permanent-magnet magnet steel 4 in two neighboring pole also adopts the mode that alternately magnetizes, every extremely go up employing cutting orientation magnetizing direction, the permanent-magnet magnetic steel capital, and Nd-Fe-B permanent magnetic magnet steel 3 on homopolarity is consistent with the magnetizing direction of ferrite permanent-magnet magnet steel 4.
See Fig. 8 and Fig. 9, the main magnetic circuit of Nd-Fe-B permanent magnetic magnet steel 3 is p
3, p
3closed-loop path is formed via the first Nd-Fe-B permanent magnetic magnet steel 31, rotor 2, second Nd-Fe-B permanent magnetic magnet steel 32, rotor 2, air gap, the second stator tooth 92, stator yoke 7, first stator tooth 91, air gap, rotor 2, first Nd-Fe-B permanent magnetic magnet steel 31; The main magnetic circuit of ferrite permanent-magnet magnet steel 4 is p
4, p
4closed-loop path is formed via ferrite permanent-magnet magnet steel 4, rotor 2, air gap, the second stator tooth 92, stator yoke 7, first stator tooth 91, air gap, rotor 2, ferrite permanent-magnet magnet steel 4, and the main magnetic circuit p of two kinds of excitation materials
3with main magnetic circuit p
4form parallel-connection structure, the mode of this kind of magnetic field superposition is conducive to the torque density and the power density that improve motor.Leakage magnetic circuit p
34with the main magnetic circuit p of Nd-Fe-B permanent magnetic magnet steel 3
3with the main magnetic circuit p of ferrite permanent-magnet magnet steel 4
4in parallel, closed-loop path is formed via the first Nd-Fe-B permanent magnetic magnet steel 31, ferrite permanent-magnet magnet steel 4, second Nd-Fe-B permanent magnetic magnet steel 32, rotor 2, air gap, the second stator tooth 92, stator yoke 7, first stator tooth 91, air gap, rotor 2, first Nd-Fe-B permanent magnetic magnet steel 31, achieve the series connection of two kinds of excitation material leakage magnetic circuits, this kind of structure can utilize permanent magnetic steel leakage field originally, makes it as effective magnetic field to improve the fan-out capability of the torque of motor of the present invention; And, can omitting every magnetic measure of Nd-Fe-B permanent magnetic magnet steel 3 inner boundary and ferrite permanent-magnet magnet steel 4 external boundary, thus reduce the difficulty of motor processing and manufacturing; In addition, the magnetic field intensity of Nd-Fe-B permanent magnetic magnet steel 3 working point is higher, so leakage magnetic circuit p
34on magnetic field intensity also higher, thus the external boundary of ferrite permanent-magnet magnet steel 4 can be protected, make it not easily by irreversible degaussing.
See Figure 10 and Figure 11, model I is traditional built-in type permanent-magnet brushless electric machine, and model II is few rare earth hybrid excitation wide range speed control permanent magnetic brushless proposed by the invention, and in model II, the consumption of Nd-Fe-B permanent magnetic magnet steel is the half of consumption in model I.Two motor models all adopt identical control method, namely base speed adopts maximum torque per ampere control below, and base speed adopts weak magnetics detect above, passes through finite element simulation, obtain relevant torque and the power characteristic of two motors, respectively as shown in Figure 10 and Figure 11.As shown in Figure 10, motor of the present invention is under the prerequisite reducing half Nd-Fe-B permanent magnetic magnet steel, by using the ferrite permanent-magnet magnet steel of low cost and the structure of reasonable arrangement two kinds of excitation materials, its torque output capability and traditional internal permanent magnet synchronous motor are compared favourably.As shown in Figure 11, compared with traditional internal permanent magnet synchronous motor, motor of the present invention shows wider output-constant operation speed adjustable range, for combinationally using of magnetic material opens wide prospect.
Claims (8)
1. a hybrid excitation permanent magnetic brushless used for electric vehicle, comprise stator (1), rotor (2) and rotating shaft (10), it is inner that rotor (2) is coaxially positioned at stator (1), the center of rotor (2) is used for laying rotating shaft (10), stator (1) is by stator tooth (9), stator slot (8) and stator yoke (7) composition, stator slot (8) is formed between adjacent two stator tooths (9), armature is around being arranged in stator slot (8), it is characterized in that: rotor (2) inside is embedded with the inside and outside two-layer permanent magnetic steel be along the circumferential direction evenly arranged, skin is the Nd-Fe-B permanent magnetic magnet steel (3) of V-type, internal layer is the ferrite permanent-magnet magnet steel (4) of spoke-like, two kinds of permanent magnetic steels are positioned at samely extremely to be gone up, Nd-Fe-B permanent magnetic magnet steel (3) and ferrite permanent-magnet magnet steel (4) the pole central shaft all about pole, place is symmetrical, the V-type opening of Nd-Fe-B permanent magnetic magnet steel (3) is towards ferrite permanent-magnet magnet steel (4), each Nd-Fe-B permanent magnetic magnet steel (3) is made up of about the pole central shaft of pole, place is symmetrical the first identical Nd-Fe-B permanent magnetic magnet steel (31) and the second Nd-Fe-B permanent magnetic magnet steel (32), and the V-type open top of described Nd-Fe-B permanent magnetic magnet steel (3) and the outer end of ferrite permanent-magnet magnet steel (4) are directly fixedly linked, Nd-Fe-B permanent magnetic magnet steel (3) in two neighboring pole tangentially alternately magnetizes, ferrite permanent-magnet magnet steel (4) in two neighboring pole also tangentially alternately magnetizes, and the Nd-Fe-B permanent magnetic magnet steel (3) on homopolarity is consistent with the magnetizing direction of ferrite permanent-magnet magnet steel (4).
2. hybrid excitation permanent magnetic brushless used for electric vehicle according to claim 1, it is characterized in that: rotor (2) cylindrical is uniform-distribution with triangular notch (6), triangular notch (6) number equals the number of poles of motor, on the axis being centrally located between two neighboring pole of triangular notch (6).
3. hybrid excitation permanent magnetic brushless used for electric vehicle according to claim 2, is characterized in that: the distance between the top of triangular notch (6) and rotor center of circle o is R
6, leg-of-mutton angle of release is 2 θ
6, need 0.9R be met
2o≤ R
6< R
2owith 0 ° of < θ
6< 0.25 θ, θ are rotor pole arc, R
2ofor the external diameter of rotor.
4. hybrid excitation permanent magnetic brushless used for electric vehicle according to claim 1, is characterized in that: the outer edge of Nd-Fe-B permanent magnetic magnet steel (3) has semicircle magnetic barrier (5).
5. hybrid excitation permanent magnetic brushless used for electric vehicle according to claim 1, is characterized in that: have radial width between described Nd-Fe-B permanent magnetic magnet steel (3) outward flange and rotor (2) outward flange.
6. hybrid excitation permanent magnetic brushless used for electric vehicle according to claim 1, it is characterized in that: armature winding becomes the centralized arrangement of modularization fractional-slot, every phase winding concentrates in together, each winding technique, on stator tooth (9), forms double-decker in stator slot (8).
7. hybrid excitation permanent magnetic brushless used for electric vehicle according to claim 1, is characterized in that: the external diameter of rotor (2) is R
2o, internal diameter is R
2i, need 15mm≤R be met
2i≤ 0.25R
2o; Angle between first Nd-Fe-B permanent magnetic magnet steel (31) and the second Nd-Fe-B permanent magnetic magnet steel (32) is θ
3, the width of the first Nd-Fe-B permanent magnetic magnet steel (31) and the second Nd-Fe-B permanent magnetic magnet steel (32) is all w
3, thickness is all h
3, 25 °≤θ need be met
3≤ 30 °, 0 < w
3< 0.25R
2o, w
3× h
3=30.8mm
2; First Nd-Fe-B permanent magnetic magnet steel (31) and the beeline between the second Nd-Fe-B permanent magnetic magnet steel (32) and the axis, pole of its pole, place are x
3, need 1mm≤x be met
3≤ 2mm; The longest distance of the first Nd-Fe-B permanent magnetic magnet steel (31) and the second Nd-Fe-B permanent magnetic magnet steel (32) distance center of circle o is y
3, need 0.8R be met
2o< y
3< R
2o-0.5h
3-2mm; Beeline between ferrite permanent-magnet magnet steel (4) and center of circle o is x
4, need R be met
2i< x
4< 1.5R
2i; Beeline between on axis between ferrite permanent-magnet magnet steel (4) to two neighboring pole is y
4, need 1mm≤y be met
4≤ 2mm.
8. hybrid excitation permanent magnetic brushless used for electric vehicle according to claim 1, is characterized in that: the facewidth at the radial center place of stator tooth (9) is t
9, the radial width of stator yoke (7) is y
7, need t be met
9≈ 2y
7.
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|---|---|---|---|
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|---|---|---|---|
| CN201510751940.9A CN105337434B (en) | 2015-11-09 | 2015-11-09 | Hybrid excitation permanent magnetic brushless used for electric vehicle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978273A (en) * | 2016-06-22 | 2016-09-28 | 上海电机学院 | Method and structure for optimizing cogging torque of built-in type permanent-magnet synchronous motor |
| WO2019174328A1 (en) * | 2018-03-16 | 2019-09-19 | 珠海格力电器股份有限公司 | Rotor structure and motor having same |
| CN111819782A (en) * | 2017-08-15 | 2020-10-23 | 鲲腾科技公司 | Electrical machine system with distributed winding structure |
| US10985620B2 (en) | 2018-03-14 | 2021-04-20 | Accelerated Systems Inc. | Devices to be used as magnets |
| US11283315B2 (en) | 2018-03-14 | 2022-03-22 | Accelerated Systems Inc. | Devices to be used as magnets |
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| JP2003199273A (en) * | 2001-12-27 | 2003-07-11 | Toshiba Corp | Permanent magnet system reluctance type rotating electric machine |
| CN1707911A (en) * | 2005-05-18 | 2005-12-14 | 天津大学 | Built-in mixed rotor magnetic circuit structural controllable flux permanent magnetic synchronous machine |
| CN103872821A (en) * | 2012-12-10 | 2014-06-18 | 株式会社电装 | Rotating electric machine |
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2015
- 2015-11-09 CN CN201510751940.9A patent/CN105337434B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003199273A (en) * | 2001-12-27 | 2003-07-11 | Toshiba Corp | Permanent magnet system reluctance type rotating electric machine |
| CN1707911A (en) * | 2005-05-18 | 2005-12-14 | 天津大学 | Built-in mixed rotor magnetic circuit structural controllable flux permanent magnetic synchronous machine |
| CN103872821A (en) * | 2012-12-10 | 2014-06-18 | 株式会社电装 | Rotating electric machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978273A (en) * | 2016-06-22 | 2016-09-28 | 上海电机学院 | Method and structure for optimizing cogging torque of built-in type permanent-magnet synchronous motor |
| CN111819782A (en) * | 2017-08-15 | 2020-10-23 | 鲲腾科技公司 | Electrical machine system with distributed winding structure |
| US10985620B2 (en) | 2018-03-14 | 2021-04-20 | Accelerated Systems Inc. | Devices to be used as magnets |
| US11283315B2 (en) | 2018-03-14 | 2022-03-22 | Accelerated Systems Inc. | Devices to be used as magnets |
| WO2019174328A1 (en) * | 2018-03-16 | 2019-09-19 | 珠海格力电器股份有限公司 | Rotor structure and motor having same |
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| Publication number | Publication date |
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| CN105337434B (en) | 2018-02-02 |
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