CN105322744A - Split type combined permanent magnet brushless motor for electric vehicle - Google Patents
Split type combined permanent magnet brushless motor for electric vehicle Download PDFInfo
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- CN105322744A CN105322744A CN201510757150.1A CN201510757150A CN105322744A CN 105322744 A CN105322744 A CN 105322744A CN 201510757150 A CN201510757150 A CN 201510757150A CN 105322744 A CN105322744 A CN 105322744A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a split type combined permanent magnet brushless motor for an electric vehicle. A rotor is coaxially positioned in the internal of a stator; a rectangular neodymium iron boron permanent magnet steel and two same rectangular ferrite permanent magnet steels are fixedly embedded in each pole of the rotor; the neodymium iron boron permanent magnet steels are close to air gaps and are symmetrical relative to the central line of the rotor poles; the two ferrite permanent magnet steels are close to a rotation shaft, are distributed on the two sides of the central line of the rotor poles and are symmetrical relative to the central line of the rotor poles; a magnetic conductive bridge is between the two ferrite permanent magnet steels; the permanent magnet steel on each pole is magnetized along the tangential direction of the circumference; the magnetizing directions on the same pole are the same, and the magnetizing directions on the adjacent two poles are opposite; the rare earth permanent magnet material and the non-rare-earth ferrite permanent magnet material are adopted at the same time; on the basis of ensuring the power density and the torque density of the permanent magnet motor with a small amount of rare earth, the cost of the motor is reduced by more than 50%; and in addition, the requirements on the torque and the power in the electric vehicle applications can be met on the premise of keeping the relatively high power density and the torque density.
Description
Technical field
The present invention relates to a kind of permagnetic synchronous motor, belong to motor manufacturing and control field, refer in particular to a kind of permanent magnetic brushless being suitable for the traction application scenario such as hybrid vehicle, electric automobile and needing the driveability requirements such as wide range speed control, high efficiency, high power density.
Background technology
Along with the lifting of permanent magnet performance, the rare-earth permanent-magnet electric machine based on neodymium iron boron, achieves extensive use in the field such as hybrid vehicle, electric automobile owing to having the advantage such as high power density, high efficiency.The exhaustive exploitation of rare earth mineral products not only makes rare earth storage level decline to a great extent in recent years, and causes heavy damage to biological environment.In order to protect the increase of rare earth resources and rare earth permanent magnet demand to result in rising violently of rare earth permanent magnet price, rare-earth permanent-magnet electric machine market also receives enormous impact, therefore, has occurred non-rare earth or few rare-earth permanent-magnet electric machine.
With regard to technological layer, non-terres rares motor can be divided into two classes.One class is the non-permanent magnetism class motor not adopting permanent magnetic material, as direct current machine, induction machine, switched reluctance machines etc.Because the armature winding on DC motor rotor needs to be connected with external circuit with brush by collector ring, when motor High Rotation Speed, can produce spark and wearing and tearing between collector ring and brush, the application in electric automobile field is relatively less.Induction machine structure is simple, and cost is relatively low, reliable, but its power density, efficiency, power factor etc. are relatively low.Switched reluctance machines structure is simple, low price and speed adjustable range is wider, but the structure of its double-salient-pole causes larger torque pulsation and running noises.Another kind of motor still belongs to the category of magneto, but this kind of motor have employed the non-rare earth permanent-magnetic material such as ferrite, aluminium nickel cobalt.Ferrite permanent-magnet materials is cheap, is only about 1/10th of rare earth permanent-magnetic material.But because the magnetic energy product of ferrite permanent-magnet is lower, directly use ferrite material permanent magnetism to replace rare earth permanent magnet excitation, the power density of motor can obviously decline, and is difficult to the requirement meeting electric automobile application.(publish in IEEETransactionsonIndustry.Applications50 volume in 2014 in document " PerformanceofPMASynRMwithferritemagnetsforEV/HEVapplicat ionsconsideringproductivity ", 4 phases, 2427-2435 page), in synchronous magnetic resistance motor, add ferrite permanent-magnet define permanent magnetism saturable synchronous magnetic resistance motor.This motor make use of reluctance torque and permanent-magnet torque simultaneously, effectively improves the torque density of motor.But because reluctance torque accounts for the major part of Driving Torque, the torque pulsation of permanent magnetism saturable synchronous magnetic resistance motor is larger.(publish in IEEEEnergyConversionCongressandExposition in 2013 in document " Rotorstructurein50kWspoke-typeinteriorpermanentmagnetsyn chronousmotorwithferritepermanentmagnetsforautomotiveapp lications ", 606-613 page), by increasing air gap in traditional spoke-like ferrite rotor, reluctance torque is utilized to improve the power density of motor, but therefore the mechanical strength of rotor also reduces, and there is risk during high-speed cruising.In order to ensure certain power density, ferrite permanent-magnet motor generally needs to adopt a large amount of ferrite permanent-magnet materials, and this can cause the d-axis inductance of motor to reduce, thus affects the weak magnetic speed-up ability of motor, is not suitable for the high-speed cruising of motor.
Therefore, while reducing rare earth permanent magnet consumption, how to ensure that the high power density of motor and the performance of wide speed regulating range are the technological difficulties that current magneto field needs to solve or break through.
Summary of the invention
The object of the invention is to propose one uses ferrite permanent-magnet materials and Nd-Fe-Bo permanent magnet material as excitation source simultaneously, has not only had higher power density but also has had the Split type combined permanent-magnet brushless electric machine used for electric vehicle of wider speed adjustable range.
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, rotor center is rotating shaft, between stator inner wall and rotor outer wall, there is air gap, rotor each extremely upper is fixedly inlaid with the ferrite permanent-magnet magnet steel of the Nd-Fe-B permanent magnetic magnet steel of the one piece of rectangle rectangle identical with two pieces, Nd-Fe-B permanent magnetic magnet steel is near air gap and relative to rotor pole center line symmetry, two blocks of ferrite permanent-magnet magnet steel are near rotating shaft and be distributed in the both sides of rotor pole center line and symmetrical relative to pole center line, it is magnetic conduction bridge between two blocks of ferrite permanent-magnet magnet steel, seamlessly between magnetic conduction bridge with two blocks of ferrite permanent-magnet magnet steel to be fixedly connected with, the radial centre lines of the same magnetic conduction bridge extremely gone up overlaps with the radial centre lines of Nd-Fe-B permanent magnetic magnet steel, the inner seamless outer end being fixedly connected with magnetic conduction bridge of the same Nd-Fe-B permanent magnetic magnet steel extremely gone up, the Nd-Fe-B permanent magnetic magnet steel of each one piece of rectangle extremely gone up and the ferrite permanent-magnet magnet steel tangential direction circumferentially of two pieces of rectangles of rotor magnetize, the same Nd-Fe-B permanent magnetic magnet steel of the one piece of rectangle extremely gone up is identical with the magnetizing direction of the ferrite permanent-magnet magnet steel of two pieces of rectangles, and the magnetizing direction of the Nd-Fe-B permanent magnetic magnet steel of one piece of rectangle in two neighboring pole and the ferrite permanent-magnet magnet steel of two pieces of rectangles is contrary.
Nd-Fe-B permanent magnetic magnet steel is w along the thickness of magnetizing direction
1, ferrite permanent-magnet magnet steel is w along the thickness of magnetizing direction
2, the thickness of magnetic conduction bridge is w
4, Nd-Fe-B permanent magnetic magnet steel 3 is h along the width of rotor radial
1, ferrite permanent-magnet magnet steel is h along the width of rotor radial
2, w
1: w
2=1:1.5, h
1: h
2=1:3.7, w
4: w
2=1:1.5.
Magnetic conduction bridge outer face is concordant with two pieces of ferrite permanent-magnet magnet steel outer faces of its both sides.
Be embedded with non-magnet material block or leave air gap betwixt between the inner of adjacent two ferrite permanent-magnet magnet steel on not homopolarity.
The beneficial effect that the present invention has after adopting technique scheme is:
1, the rotor of motor of the present invention have employed rare earth permanent magnet and the dissimilar material of two kinds, non-rare-earth ferrite permanent magnetism simultaneously, and non-rare earth permanent-magnetic material consumption accounts for more than 60% of total permanent magnetism consumption (rare earth and non-rare earth), on the basis of the power density and torque density of guaranteeing few rare-earth permanent-magnet electric machine, cost reduces by more than 50%, the requirement of electric automobile application scenario to torque and power can be met under the prerequisite possessing higher power density and torque density
2, motor permanent magnetic material consumption of the present invention and motor inductances etc. directly determine the Key Performance Indicators such as the torque density of motor, weak magnetic energy power and speed adjustable range.Extremely go up in each of motor, two block splitting formulas ferrite permanent magnet placed side by side and one piece of rare-earth permanent magnet is embedded with from the inside to the outside respectively along radial direction, the thickness of ferrite permanent magnet and rare-earth permanent magnet designs by 3.7:1 dimensionally by 1.5:1, width dimensionally, ensure that motor is at the power density of middle low regime and torque density, effectively improve the weak magnetic energy power of high velocity, be conducive to the high-performance cruise ability of electric automobile.
3, in motor of the present invention, non-rare-earth ferrite permanent magnet have employed two pieces of ferrite Split types structure placed side by side, and two pieces of ferritic thickness can be equal or not etc., but meet 1:1.5 between the silicon steel sheet magnetic inductive block thickness between Split type structure two pieces of ferrites and ferritic thickness, the magnetic flux of two pieces of ferrite generations is connected by silicon steel sheet magnetic inductive block, this modes of emplacement effectively reduces the magnetic resistance of weak magnetic loop, increase the d-axis inductance of motor, further enhancing the weak magnetic speed-up ability of motor, and reduce permanent magnet eddy current loss.
4, motor of the present invention adopts ferrite permanent-magnet and one piece of rare earth permanent magnet hybrid excitation of two block splittings, the magnetic flux that rare earth permanent magnet produces is in parallel with the magnetic flux of connecting that two pieces of ferrite permanent-magnets produce, keep the thickness of ferrite permanent-magnet constant, increase the thickness of rare earth permanent magnet, effectively can improve the working point of ferrite permanent-magnet, prevent the irreversible degaussing of ferrite permanent-magnet, because the thickness of rare earth permanent magnet is less, magnetic resistance is little, a large amount of weak magnetic magnetic fluxs through rare earth permanent magnet, thus can improve the anti-degaussing ability of ferrite permanent-magnet.
5, the rotor of motor of the present invention adopts spoke-like structure, and permanent magnetic steel circumferentially tangential direction alternately magnetizes, and utilizes " poly-magnetic benefit " effectively to improve utilance and the torque density of permanent magnetic material.Rotor overall structure have employed the modular modular construction of piecemeal, effectively reduce eddy current loss and the iron loss of rotor core, Modular rotor partitioned organization, simplifies installation difficulty.
6, the stator of motor of the present invention adopts the centralized winding of modularization fractional-slot, and winding phase-splitting carries out modularization phase-splitting by " AABBCC ", improves motor winding factor, reduces winding back emf harmonic wave, can reduce the torque pulsation in motor operation course.
Accompanying drawing explanation
Fig. 1 is the radial section structural representation of the present invention's Split type combined permanent-magnet used for electric vehicle brushless electric machine;
Fig. 2 is Automatic manual transmission axial view of the present invention;
Fig. 3 is that Fig. 1 rotor partial structurtes enlarged diagram and permanent magnetic steel magnetize schematic diagram;
Fig. 4 is stator structure schematic diagram and three-phase windings distribution map in Fig. 1;
Fig. 5 is the connected mode schematic diagram of stator armature winding in Fig. 4;
Fig. 6 is the magnetic flux schematic diagram of permanent magnetic steel in the present invention;
Fig. 7 is no-load magnetic field distribution map of the present invention;
Fig. 8 is d-axis, quadrature axis schematic diagram on Fig. 1 rotor;
Fig. 9 is structure and the physical dimension mark enlarged diagram of permanent magnetic steel in Fig. 1;
Figure 10 is traditional spoke-like ferrite permanent-magnet synchronous machine radial section structural representation;
Figure 11 is that the torque of the present invention and traditional spoke-like ferrite permanent-magnet synchronous machine is with rotation speed change comparison diagram;
Figure 12 is that the power of the present invention and traditional spoke-like ferrite permanent-magnet synchronous machine is with rotation speed change comparison diagram.
In figure: 1. stator; 2. rotor; 3. Nd-Fe-B permanent magnetic magnet steel; 4. ferrite permanent-magnet magnet steel; 5. circular locating openings; 6. non-magnet material block; 7. end cap; 8. rotating shaft; 9. support; 10. stator yoke; 11. stator tooths; 12. armature winding; 13. stator slots; 14. magnetic conduction bridges.
Embodiment
See Fig. 1, Fig. 2 and Fig. 3, the present invention includes stator 1, rotor 2, rotating shaft 8 and end cap 7, stator 1 and end cap 7 are fixed together, and end cap 7 is fixedly mounted on support 9.It is inner that rotor 2 is coaxially positioned at stator 1, and there is fluting at the center of rotor 2, and for laying rotating shaft 8, rotor 2 is by rotating shaft 8 driven rotary.Stator 1 and rotor 2 are all formed by the silicon steel plate stacking of 0.35mm thickness, and stacking factor is 0.95, and rotating shaft 8 is made up of non-magnet_conductible material.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.
Rotor 2 each extremely goes up the ferrite permanent-magnet magnet steel 4 of the Nd-Fe-B permanent magnetic magnet steel 3 that is fixedly the inlaid with one piece of rectangle rectangle identical with two pieces.Wherein, Nd-Fe-B permanent magnetic magnet steel 3 is positioned at rotor 2 near the part of air gap and relative to this rotor pole center line symmetry, two blocks of ferrite permanent-magnet magnet steel 4 are positioned at the part of rotor 2 near rotating shaft 8, and are distributed in the both sides of rotor pole center line and symmetrical relative to pole center line.Rotor 2 is made to be embedded with two block splitting formulas ferrite permanent magnet placed side by side and one piece of rare-earth permanent magnet from the inside to the outside respectively along radial direction.The Nd-Fe-B permanent magnetic magnet steel 3 extremely gone up of rotor 2 all circumferencial direction is uniformly distributed.Fig. 1, only for 10 pole motors, has 10 blocks of Nd-Fe-B permanent magnetic magnet steel 3 and 20 blocks of ferrite permanent-magnet magnet steel 4 are along the circumferential direction evenly embedded in rotor 2.Magnetic conduction bridge 14, between two blocks of ferrite permanent-magnet magnet steel 4, seamlessly between magnetic conduction bridge 14 with two blocks of ferrite permanent-magnet magnet steel 4 to be fixedly connected with.The radial centre lines of the same magnetic conduction bridge 14 extremely gone up overlaps with the radial centre lines of Nd-Fe-B permanent magnetic magnet steel 3, diametrically same.The inner seamless outer end being fixedly connected on magnetic conduction bridge 14 of the same Nd-Fe-B permanent magnetic magnet steel 3 extremely gone up.The outer face of magnetic conduction bridge 14 is concordant with two pieces of ferrite permanent-magnet magnet steel 4 outer faces of magnetic conduction bridge 14 both sides.In order to prevent the leakage field of the inner end of ferrite permanent-magnet magnet steel 4, between the inner of adjacent two the ferrite permanent-magnet magnet steel 4 on not homopolarity, be embedded with non-magnet material block 6.In order to Simplified flowsheet or the weight alleviating rotor 2, air gap also directly can be adopted as non-magnet material block 6, between the inner face of adjacent two the ferrite permanent-magnet magnet steel 4 namely on not homopolarity, leave air gap.
On rotor 2, the position near rotating shaft 8 and the position near stator 1 are all respectively along the circumferential direction evenly distributed with the circular locating openings 5 equal with rotor 2 number of poles, to strengthen the mechanical strength of rotor 2.The center of circle of circular locating openings 5 is positioned in the symmetrical center line of rotor two neighboring pole.
See Fig. 3, the Nd-Fe-B permanent magnetic magnet steel 3 of each one piece of rectangle extremely gone up and ferrite permanent-magnet magnet steel 4 tangential direction circumferentially of two pieces of rectangles of rotor 2 magnetize, the same Nd-Fe-B permanent magnetic magnet steel 3 of the one piece of rectangle extremely gone up is identical with the magnetizing direction of the ferrite permanent-magnet magnet steel of two pieces of rectangles, and the magnetizing direction of the Nd-Fe-B permanent magnetic magnet steel 3 of one piece of rectangle in two neighboring pole and the ferrite permanent-magnet magnet steel of two pieces of rectangles is contrary.
See Fig. 4, stator 1 is made up of stator yoke 10, stator tooth 11, stator slot 13.Form stator slot 13 between adjacent two stator tooths 11, stator tooth 11 radial cross-section be T-shaped, T-shaped top near rotor 2, T-shaped bottom and stator yoke 10 are connected as a single entity.On stator tooth 11, cover has centralized armature winding 12.Stator 1 has 12 stator tooths 11, the armature winding 12 often on adjacent two stator tooths 11 is corresponding A, B, C three-phase respectively.
See the inlet wire direction that "+" in Fig. 5, Fig. 4 is armature winding 12, "-" is the outlet direction of armature winding 12, and A, B, C are motor three-phase windings.In Fig. 4 mark the 13-1 that asks until 13-12 is respectively 12 stator slots 13, be placed with two armature winding 12 in each stator slot 13.
See Fig. 6 and Fig. 7, the path of the magnetic flux A that Nd-Fe-B permanent magnetic magnet steel 3 produces is as follows: successively through Nd-Fe-B permanent magnetic magnet steel 3, first stator tooth 11, stator yoke 10, second stator tooth 11; The path of the magnetic flux B of two pieces of ferrite permanent-magnet magnet steel 4 series connection generations is as follows: successively through second block of ferrite permanent-magnet magnet steel 4, magnetic conduction bridge 14, first block of ferrite permanent-magnet magnet steel 4, first stator tooth 11, stator yoke 10, second stator tooth 11; There is leakage field in the inner end of ferrite permanent-magnet magnet steel 4, the path of its leakage field magnetic flux C produced is as follows: second piece of ferrite permanent-magnet magnet steel 4, magnetic conduction bridge 14, first block of ferrite permanent-magnet magnet steel 4, first piece of non-magnet material 6, spoke-like rotor part 2-2, second piece of non-magnet material block 6.The total magnetic flux that on magnetic flux B formation parallel with one another rotor pole that magnetic flux A and two piece of ferrite permanent-magnet magnet steel 4 series connection that Nd-Fe-B permanent magnetic magnet steel 3 produces produces, permanent magnet produces.Meanwhile, because non-magnet material block 6 increases the magnetic resistance in the path of the inner end leakage field magnetic flux C that ferrite permanent-magnet magnet steel 4 produces, the brow leakage of ferrite permanent-magnet magnet steel 4 obtains effective suppression.
See Fig. 8, Nd-Fe-B permanent magnetic magnet steel 3 and ferrite permanent-magnet magnet steel 4 are positioned on d-axis magnetic circuit, and the d-axis inductance of motor is less.Ferrite permanent-magnet magnet steel 4 adopts splitted construction, and the magnetic conduction bridge 14 between two blocks of ferrite permanent-magnet magnet steel 4 effectively can increase the d-axis inductance of motor, thus increases the speed adjustable range of motor.
See Fig. 9, Nd-Fe-B permanent magnetic magnet steel 3 is along the thickness w of magnetizing direction
1with the thickness w of ferrite permanent-magnet magnet steel 4 along magnetizing direction
2directly determine the magnetic resistance of d-axis magnetic circuit, thus comparatively large to the d-axis inductive impact of motor, and Nd-Fe-B permanent magnetic magnet steel 3 is along the width h of rotor 2 radial direction
1with the width h of ferrite permanent-magnet magnet steel 4 along rotor radial
2larger on the Driving Torque impact of motor.In order on the basis of maintenance one export by constant moment, reduce the consumption of rare earth permanent magnet as far as possible and ensure certain speed adjustable range, needing Rational choice Nd-Fe-B permanent magnetic magnet steel 3 along the thickness w of magnetizing direction
1, along the width h of rotor radial
1with the thickness w of two blocks of ferrite permanent-magnet magnet steel 4 along magnetizing direction
2, w
3, two blocks of ferrite permanent-magnet magnet steel 4 are along the width h of rotor radial
2.Wherein, w
2=w
3, w
1: w
2=1:1.5, h
1: h
2=1:3.7, such size design makes ferrite permanent-magnet magnet steel 4 non-rare earth permanent-magnetic material consumption account for more than 60% of total permanent magnetism consumption (rare earth and non-rare earth), ensure that motor is at the power density of middle low regime and torque density, effectively improves the weak magnetic energy power of high velocity.The thickness w of magnetic conduction bridge 14
4with the thickness w of two blocks of ferrite permanent-magnet magnet steel 4
2between meet w
4: w
2=1:1.5, this modes of emplacement effectively reduces the magnetic resistance of weak magnetic loop, improves the inductance of motor, further enhancing the weak magnetic speed-up ability of motor.
Combine the advantage of permanent magnet type synchronous motor to fully demonstrate the present invention, Figure 10 is traditional spoke-like ferrite permanent-magnet synchronous machine.As can be seen from Figure 10, ferrite permanent-magnet magnet steel 4 is only adopted to carry out excitation in traditional spoke-like ferrite permanent-magnet synchronous machine.Under identical watt level, in traditional spoke-like ferrite permanent-magnet synchronous machine, the thickness of ferrite permanent-magnet magnet steel 4 is greater than the thickness sum of two blocks of ferrite permanent-magnet magnet steel 4 of the present invention, and therefore on its d-axis magnetic circuit, magnetic resistance is comparatively large, and d-axis inductance is less.And the d-axis inductance that can increase motor every magnetic bridge 14 further between the present invention's two blocks of ferrite permanent-magnet magnet steel 4.
Traditional spoke-like ferrite permanent-magnet synchronous machine of same watt level and the present invention are analyzed.Under identical inverter circuit and voltage, identical control method (maximum torque per ampere control and maximum power output control) is adopted to conventional motors and the present invention, pass through finite element simulation, obtain relevant torque and the power characteristic of two motors, respectively see Figure 11 and Figure 12, curve E in Figure 11 and Figure 12 represents motor of the present invention, and curve F represents traditional spoke-like ferrite permanent-magnet synchronous machine.As shown in Figure 11, during low speed, two motors have identical Driving Torque; During high speed, under same rotating speed, the Driving Torque of motor of the present invention is higher than traditional spoke-like ferrite permanent-magnet synchronous machine.See Figure 12, when low speed, adopt breakdown torque to start, two power of motor ascending curves overlap.During high speed, because motor d-axis inductance of the present invention is comparatively large, obviously expand electric machine speed regulation scope.
Claims (7)
1. a Split type combined permanent-magnet brushless electric machine used for electric vehicle, comprise stator (1), rotor (2) and rotating shaft (8), it is inner that rotor (2) is coaxially positioned at stator (1), rotor (2) center is rotating shaft (8), between stator (1) inwall and rotor (2) outer wall, there is air gap, it is characterized in that: rotor (2) each extremely upper is fixedly inlaid with the ferrite permanent-magnet magnet steel (4) of the Nd-Fe-B permanent magnetic magnet steel (3) of the one piece of rectangle rectangle identical with two pieces, Nd-Fe-B permanent magnetic magnet steel (3) is near air gap and relative to rotor pole center line symmetry, two pieces of ferrite permanent-magnet magnet steel (4) are near rotating shafts (8) and be distributed in the both sides of rotor pole center line and symmetrical relative to pole center line, magnetic conduction bridge (14) between two pieces of ferrite permanent-magnet magnet steel (4), seamlessly between magnetic conduction bridge (14) with two pieces of ferrite permanent-magnet magnet steel (4) to be fixedly connected with, the radial centre lines of the same magnetic conduction bridge (14) extremely gone up overlaps with the radial centre lines of Nd-Fe-B permanent magnetic magnet steel (3), the inner seamless outer end being fixedly connected with magnetic conduction bridge (14) of the same Nd-Fe-B permanent magnetic magnet steel (3) extremely gone up, the Nd-Fe-B permanent magnetic magnet steel (3) of each one piece of rectangle extremely gone up and ferrite permanent-magnet magnet steel (4) tangential direction circumferentially of two pieces of rectangles of rotor (2) magnetize, the Nd-Fe-B permanent magnetic magnet steel (3) of the same one piece of rectangle extremely gone up is identical with the magnetizing direction of the ferrite permanent-magnet magnet steel of two pieces of rectangles, and the magnetizing direction of the Nd-Fe-B permanent magnetic magnet steel (3) of one piece of rectangle in two neighboring pole and the ferrite permanent-magnet magnet steel of two pieces of rectangles is contrary.
2. a kind of Split type combined permanent-magnet brushless electric machine used for electric vehicle according to claim 1, is characterized in that: Nd-Fe-B permanent magnetic magnet steel (3) is w along the thickness of magnetizing direction
1, ferrite permanent-magnet magnet steel (4) is w along the thickness of magnetizing direction
2, the thickness of magnetic conduction bridge (14) is w
4, Nd-Fe-B permanent magnetic magnet steel (3) is h along the width of rotor radial
1, ferrite permanent-magnet magnet steel (4) is h along the width of rotor radial
2, w
1: w
2=1:1.5, h
1: h
2=1:3.7, w
4: w
2=1:1.5.
3. a kind of Split type combined permanent-magnet brushless electric machine used for electric vehicle according to claim 1, is characterized in that: magnetic conduction bridge (14) outer face is concordant with two pieces of ferrite permanent-magnet magnet steel (4) outer faces of its both sides.
4. a kind of Split type combined permanent-magnet brushless electric machine used for electric vehicle according to claim 1, is characterized in that: be embedded with non-magnet material block (6) between the inner of adjacent two the ferrite permanent-magnet magnet steel (4) on not homopolarity.
5. a kind of Split type combined permanent-magnet brushless electric machine used for electric vehicle according to claim 1, is characterized in that: leave air gap between the inner face of adjacent two the ferrite permanent-magnet magnet steel (4) on not homopolarity.
6. a kind of Split type combined permanent-magnet brushless electric machine used for electric vehicle according to claim 1, it is characterized in that: on rotor (2), position near rotating shaft (8) and the position near stator (1) are all respectively along the circumferential direction evenly distributed with the circular locating openings (5) equal with rotor (2) number of poles, and the center of circle of circular locating openings (5) is positioned in the symmetrical center line of rotor (2) two neighboring pole.
7. a kind of Split type combined permanent-magnet brushless electric machine used for electric vehicle according to claim 1, it is characterized in that: stator (1) is made up of stator yoke (10), stator tooth (11) and stator slot (13), stator slot (13) is formed between adjacent two stator tooths (11), stator tooth (11) radial cross-section is T-shaped, have centralized armature winding (12) at the upper cover of stator tooth (11), the armature winding (12) often on adjacent two stator tooths (11) is corresponding A, B, C three-phase respectively.
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| CN105529841A (en) * | 2016-02-28 | 2016-04-27 | 天津市革能科技有限公司 | Combined type neodymium-iron-boron mechanism used for motor |
| CN109378916A (en) * | 2018-12-14 | 2019-02-22 | 哈尔滨理工大学 | A kind of auxiliary permanent magnet alternating pole spoke type rotor structure for permanent magnet motor |
| CN112615446A (en) * | 2020-11-18 | 2021-04-06 | 广东威灵电机制造有限公司 | Rotor punching sheet, rotor assembly and motor |
| US10985620B2 (en) | 2018-03-14 | 2021-04-20 | Accelerated Systems Inc. | Devices to be used as magnets |
| CN112910200A (en) * | 2021-03-16 | 2021-06-04 | 山东理工大学 | Production method of permanent magnet rotor of combined permanent magnet and brushless electromagnetic hybrid excitation generator for automobile |
| CN113131631A (en) * | 2021-05-07 | 2021-07-16 | 山东理工大学 | Driving motor of electric automobile |
| CN113381525A (en) * | 2021-04-13 | 2021-09-10 | 江苏交科能源科技发展有限公司 | Low-cost hybrid magnetic steel permanent magnet motor and use method thereof |
| US11283315B2 (en) | 2018-03-14 | 2022-03-22 | Accelerated Systems Inc. | Devices to be used as magnets |
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| DE102013202006A1 (en) * | 2013-02-07 | 2014-08-07 | Robert Bosch Gmbh | Rotor assembly for electric machine, has permanent magnet with first and second portions that are transverse to arrangement direction of pole shoes, while thickness of the pole shoes are different in arrangement direction |
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| JP2003199273A (en) * | 2001-12-27 | 2003-07-11 | Toshiba Corp | Permanent magnet system reluctance type rotating electric machine |
| CN101710746A (en) * | 2009-12-16 | 2010-05-19 | 三一电气有限责任公司 | Rotor and self-starting three-phase permanent magnet motor |
| DE102013202006A1 (en) * | 2013-02-07 | 2014-08-07 | Robert Bosch Gmbh | Rotor assembly for electric machine, has permanent magnet with first and second portions that are transverse to arrangement direction of pole shoes, while thickness of the pole shoes are different in arrangement direction |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529841A (en) * | 2016-02-28 | 2016-04-27 | 天津市革能科技有限公司 | Combined type neodymium-iron-boron mechanism used for motor |
| 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 |
| CN109378916A (en) * | 2018-12-14 | 2019-02-22 | 哈尔滨理工大学 | A kind of auxiliary permanent magnet alternating pole spoke type rotor structure for permanent magnet motor |
| CN112615446A (en) * | 2020-11-18 | 2021-04-06 | 广东威灵电机制造有限公司 | Rotor punching sheet, rotor assembly and motor |
| CN112910200A (en) * | 2021-03-16 | 2021-06-04 | 山东理工大学 | Production method of permanent magnet rotor of combined permanent magnet and brushless electromagnetic hybrid excitation generator for automobile |
| CN113381525A (en) * | 2021-04-13 | 2021-09-10 | 江苏交科能源科技发展有限公司 | Low-cost hybrid magnetic steel permanent magnet motor and use method thereof |
| CN113131631A (en) * | 2021-05-07 | 2021-07-16 | 山东理工大学 | Driving motor of electric automobile |
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| CN105322744B (en) | 2018-08-10 |
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