CN204615602U - Electric automobile drives with fault tolerant type four phase switch reluctance motor - Google Patents

Electric automobile drives with fault tolerant type four phase switch reluctance motor Download PDF

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Publication number
CN204615602U
CN204615602U CN201520267436.7U CN201520267436U CN204615602U CN 204615602 U CN204615602 U CN 204615602U CN 201520267436 U CN201520267436 U CN 201520267436U CN 204615602 U CN204615602 U CN 204615602U
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China
Prior art keywords
rotor
stator
tooth
winding
wide
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CN201520267436.7U
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Chinese (zh)
Inventor
孙晓东
薛正旺
陈龙
江浩斌
陈建锋
袁朝春
汪少华
张厚忠
徐兴
盘朝奉
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江苏大学
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Priority to CN201520267436.7U priority Critical patent/CN204615602U/en
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Abstract

The utility model discloses a kind of electric automobile driving fault tolerant type four phase switch reluctance motor, and stator is made up of stator yoke and stator tooth, has 8 wide teeth and 8 narrow teeth to be mutually alternately distributed formation stator tooth along the circumferencial direction of stator yoke inner ring; Rotor is made up of rotor core block and rotor cover, has 10 rotor core blocks be evenly arranged along the circumferencial direction of rotor cover outer ring and in all fixedly embedded rotor cover, form columniform rotor together with overlapping with rotor; Described 8 wide teeth all concentrate winding stator winding, and the direction of winding on adjacent wide tooth is identical, and form the polarity distribution of NNNNSSSS, the winding forward on two relative wide teeth is connected into a phase; Under motor does not line up situation, torque output capability improves; Adopt the rotor core block of point block-type to embed in non-magnetic rotor cover, magnetic circuit is shorter, and reduce leakage field, windage is little; Do not have the narrow tooth of coiling both can realize shorter magnetic circuit as the loop of magnetic flux, can play isolation yet.

Description

Electric automobile drives with fault tolerant type four phase switch reluctance motor
Technical field
The utility model belongs to motor manufacturing applied technical field, is specifically related to a kind of switched reluctance motor for electric automobile.
Background technology
Along with increasingly sharpening of the problem such as energy crisis, environmental pollution, the electric automobile with outstanding advantages such as high efficiency, low stain, low noise and power source are wide receives publicity.The advantages such as switched reluctance motor is high with its efficiency, cost is low, structure is simple, reliable operation, speed adjustable range are wide, become most preferably one of scheme of drive system of electric automobile.
Traditional switched reluctance motor, its stators and rotators is all in double-salient-pole structure, make operate time torque pulsation and vibrating noise relatively large, and the double-salient-pole structure of stators and rotators makes rotor windage large when running up, these shortcomings have become one of the difficult point and bottleneck that Conventional switched reluctance motor is applied in electric automobile field.
As shown in Figure 1, belong to salient pole type reluctance motor, rotor coaxial is enclosed within stator the more traditional threephase switch reluctance motor of current research, and rotating shaft is coaxially fixed in rotating shaft 16, by rotating shaft 16 driven rotary.Rotor is made up of rotor tooth 14 and rotor yoke 15, and stator is made up of stator yoke 11 and stator tooth 12, and stator tooth 12 is wound with stator winding 13.In order to simplified structure, Fig. 1 only draws out the canoe of a phase winding.Although this motor has the simple advantage of structure, but also there is following shortcoming: 1. because the facewidth of stator tooth and the ratio of rotor polar distance can not amplify a lot (if ratio is larger, so when stator poles to align with rotor interpolar axis that namely self-induction is minimum, minimum inductance can be made to increase), thus make Driving Torque ability low, be unfavorable for during entrucking that the low rate start of electric automobile runs; 2. when running up, the double-salient-pole structure of stators and rotators makes rotor windage large; 3. a certain phase magnetic circuit schematic diagram of traditional three-phase switch reluctance machine as shown in Figure 2, its magnetic circuit belongs to four polar forms as can be known from Fig. 2, and longer magnetic circuit can cause core loss to increase, thus electric efficiency is reduced; 4. in fig. 2, when a certain phase winding excitation, only do not produce the main magnetic circuit of four polar forms, and can produce leakage field phenomenon, like this when three phase sequence energisings, the coupling between the magnetic circuit between adjacent teeth is very important, so just have impact on the fault freedom of motor.
Summary of the invention
The purpose of this utility model is to overcome the weak point existed when above-mentioned traditional threephase switch reluctance motor drives for electric automobile, propose that a kind of Driving Torque is large, windage is little, magnetic circuit is short, efficiency is high, there are novel four phase switch reluctance motors driven for electric automobile of fault tolerance, to improve motor fault-tolerant performance further, improve its ability that operates with failure.
For achieving the above object, the technical solution adopted in the utility model is: the utility model comprises stators and rotators, rotor coaxial is enclosed within stator, radial air gap is left between stator and rotor, stator is made up of stator yoke and stator tooth, has 8 wide teeth and 8 narrow teeth to be mutually alternately distributed formation stator tooth along the circumferencial direction of stator yoke inner ring; Rotor is made up of rotor core block and rotor cover, has 10 rotor core blocks be evenly arranged along the circumferencial direction of rotor cover outer ring and in all fixedly embedded rotor cover, form columniform rotor together with overlapping with rotor; Described 8 wide teeth all concentrate winding stator winding, and the direction of winding on adjacent wide tooth is identical, and form the polarity distribution of NNNNSSSS, the winding forward on two relative wide teeth is connected into a phase.
The beneficial effects of the utility model are:
1, stator tooth of the present utility model adopts the version that wide tooth and narrow tooth are arranged in pairs or groups, rotor adopts the iron core of piecemeal block-shaped, under motor does not line up situation (shown in Fig. 4), due to the gap that rotor core interblock exists all the time, it is also little that the minimum inductance making not line up position can not line up the minimum inductance of position than regular tap reluctance motor, thus the torque output capability of motor is improved.
2, adopt the rotor core block of point block-type to embed in non-magnetic rotor cover, not only magnetic circuit is shorter, decreases leakage field, and windage is little, finally can improve motor running efficiency.
3, do not have the narrow tooth of coiling both can realize shorter magnetic circuit as the loop of magnetic flux, can play isolation yet, have effectively achieved the isolation between magnetic circuit, circuit, temperature.When motor is a certain break down mutually time, narrow tooth can provide magnetic loop to reduce motor mutual inductance, reduces the impact on other phase windings, improves the ability that motor operates with failure.
4, non-magnetic rotor cover is made of aluminum, and the mechanical strength of rotor is improved, and the weight of whole motor is alleviated.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of traditional threephase switch reluctance motor, and in order to simplified structure, this figure only draws out the canoe of a phase winding;
In Fig. 1, label and name are called: 11. stator yoke; 12. stator tooths; 13. stator winding; 14. rotor tooths; 15. rotor yokes; 16. rotating shafts.
Aligned position (inductance is maximum) flux loop figure when Fig. 2 is a certain phase winding excitation of traditional threephase switch reluctance motor shown in Fig. 1;
Fig. 3 is the utility model electric automobile driving fault tolerant type four phase switch reluctance motor cross-sectional structure schematic diagram;
In Fig. 3, label and name are called: 1. stator yoke; 2. wide tooth; 3. narrow tooth; 4. stator winding; 5. rotor core block; 6. rotor cover; 7. rotating shaft.
Do not line up position (inductance is minimum) flux loop figure when Fig. 4 is a certain phase winding excitation of the present utility model shown in Fig. 3, defining now rotor position angle is 0 degree;
Flux loop figure when rotor position angle is 10.8 degree when Fig. 5 is a certain phase winding excitation of the present utility model shown in Fig. 3;
The flux loop figure of aligned position (inductance is maximum) when Fig. 6 is a certain phase winding excitation of the present utility model shown in Fig. 3, rotor position angle is 18 degree this moment;
Flux loop figure when rotor position angle is 28.8 degree when Fig. 7 is a certain phase winding excitation of the present utility model shown in Fig. 3;
Flux loop figure when rotor position angle is 36 degree when Fig. 8 is a certain phase winding excitation of the present utility model shown in Fig. 3.0 degree of position got back to again by rotor this moment.
Embodiment
As shown in Figure 3, this the utility model electric automobile drives with fault tolerant type four phase switch reluctance motor, comprise stators and rotators, rotor coaxial is enclosed within stator, and fixed cover is at rotating shaft 7 outer surface, by rotating shaft 7 driven rotary, stator is made up of stator yoke 1 and stator tooth, and 8 wide teeth 2 and 8 narrow teeth 3 form stator tooth, and 8 wide teeth 2 and 8 narrow teeth 3 are alternately distributed mutually along the circumferencial direction of stator yoke 1 inner ring, each wide tooth 2 both sides are narrow teeth 3, and each narrow tooth 3 both sides are wide teeth 2.Stator yoke 1, wide tooth 2 and narrow tooth 3 laminate by electrical steel sheet and make.
Rotor overlaps 6 by rotor core block 5 and rotor and forms, and rotor cover 6 is made up, to improve mechanical strength of non-magnet_conductible material such as aluminium.Rotor core block 5 forms by silicon steel plate stacking.The circumferencial direction that 10 rotor core blocks 5 overlap 6 outer rings along rotor is evenly arranged, and in fixedly embedded rotor cover 6, forms columniform rotor together with overlapping 6 with rotor.
Rotor core block 5 is that fan-shaped top forms by the T-shaped bottom of cross section and cross section, and T-shaped bottom is embedded in T-slot corresponding in rotor cover 6, so as rotor when rotated radial direction fix rotor core block 5.The fan-shaped top extrados of rotor core block 5 and rotor overlap the outer ring of 6 on same circle, make rotor core block 5 and rotor overlap 6 and form the smooth cylindrical rotor of a flush with outer surface.
Leave radial air gap between stator and rotor, radial air gap is 0.3mm.
Narrow tooth 3 is not wound around stator winding, and 8 wide teeth 2 all concentrate winding stator winding 4, are stator winding a2, b2, c3, d4, a2, b2, c3, d4 respectively.The sense of current of stator winding 4 as shown in Figure 3, wherein " ⊕ " represents that the sense of current perpendicular to paper inwards, " ⊙ " represents that the sense of current is outside perpendicular to paper, can obtain stator winding a1, b1, c1, d1 according to " Ampere's law two " is NNNN pole, and stator winding a2, b2, c3, d4 are SSSS pole, direction of winding on adjacent wide tooth 2 is identical, thus forms the polarity distribution of NNNNSSSS.Winding forward on two relative wide teeth 2 is connected into a phase, namely relative stator winding a1, a2 forward is connected into A phase, relative stator winding b1, b2 forward is connected into B phase, relative stator winding c1, c2 forward is connected into C phase, relative stator winding d1, d2 forward is connected into D phase, is A, B, C, D tetra-phase winding altogether.Each phase winding is connected by external circuit and passes to electric current in the self-induction rising stage of each phase winding, and wide tooth 2 pairs of rotor core blocks 5 produce suction, and rotor is got into smooth.
The utility model motor is rotated counterclockwise in a rotor cycle, and concrete magnetic loop route during a certain phase winding excitation is as shown in Fig. 4 ~ Fig. 8.In the diagram, when to be in rotor position angle be 0 degree to the utility model motor, the center line of wide tooth 2 aligns with the center line of rotor core block 5, the magnetic field major loop that a certain phase winding is set up is: by the air gap of wide tooth 2 through between stators and rotators to rotor core block 5, then two-way is divided into from symmetry rotor core block 5, via air gap on two narrow teeth 3 of wide tooth 2 both sides, then got back on field pole through stator yoke 1 by narrow tooth 3.The magnetic loop formed is four polar forms.Compared with the magnetic loop of regular tap reluctance motor in Fig. 2, the magnetic loop of the utility model motor is relatively shorter.Because the center line of the now wide tooth 2 of stator aligns with the center line of rotor core block 5, now magnetic resistance is maximum, so self-induction is minimum.In Figure 5, when rotor core block 5 leaves the wide tooth 2 of excitation counterclockwise, next rotor core block 5 turn to the wide tooth 2 of excitation and the forward position of its rotor core block 5 with after the wide tooth of excitation along overlaps time, this moment due between stators and rotators air gap reduction, magnetic resistance reduces, thus self-induction increases.When rotor forward to as shown in Figure 6 self-induction maximum position time, the center line of the wide tooth 2 of excitation overlaps with the center line of rotor core block 5, and between stators and rotators, magnetic resistance is minimum.When rotor core block 5 leaves self-induction maximum position, as shown in Figure 7, between stators and rotators, air gap increases again this moment, the corresponding increase of magnetic resistance, thus self-induction declines, until rotor core block 5 turns over one-period, when to get back to again rotor position angle be 0 degree, self-induction is minimum, and motor completes the operation of a rotor cycle, as shown in Figure 8.
In order to the narrow tooth 3 making the magnetic line of force flowed out in leniently tooth 2 be uniformly distributed in adjacent both sides, the facewidth of wide tooth 2 is the twice of the facewidth of narrow tooth 3; Close basically identical in order to ensure the magnetic in stator yoke, stator teeth and rotor core block 5, the facewidth three of the tooth depth of rotor core block 5, the thickness of stator yoke, narrow tooth is equal.
According to the above, just the utility model can be realized.To the other changes and modifications that those skilled in the art makes when not deviating from spirit of the present utility model and protection range, be still included within the utility model protection range.

Claims (5)

1. an electric automobile drives with fault tolerant type four phase switch reluctance motor, comprise stators and rotators, rotor coaxial is enclosed within stator, radial air gap is left between stator and rotor, it is characterized in that: stator is made up of stator yoke (1) and stator tooth having 8 wide teeth (2) and 8 narrow teeth (3) to be mutually alternately distributed formation stator tooth along the circumferencial direction of stator yoke (1) inner ring; Rotor is made up of rotor core block (5) and rotor cover (6), has 10 rotor core blocks (5) be evenly arranged along the circumferencial direction of rotor cover (6) outer ring and in all fixedly embedded rotor cover (6), form columniform rotor together with rotor cover (6); Described 8 wide teeth (2) all concentrate winding stator winding (4), and the direction of winding on adjacent wide tooth (2) is identical, and form the polarity distribution of NNNNSSSS, the winding forward on two relative wide teeth (2) is connected into a phase.
2. electric automobile drives with fault tolerant type four phase switch reluctance motor according to claim 1, it is characterized in that: rotor core block (5) is that fan-shaped top forms by the T-shaped bottom of cross section and cross section, T-shaped bottom is embedded in T-slot corresponding in rotor cover (6), and the outer ring of fan-shaped top extrados and rotor cover (6) is on same circle.
3. electric automobile drives with fault tolerant type four phase switch reluctance motor according to claim 1, and it is characterized in that: rotor cover (6) is made up of non-magnet_conductible material, rotor core block (5) is formed by silicon steel plate stacking.
4. electric automobile drives with fault tolerant type four phase switch reluctance motor according to claim 1, it is characterized in that: stator yoke (1), wide tooth (2) and narrow tooth (3) laminate by electrical steel sheet to be made.
5. electric automobile drives with fault tolerant type four phase switch reluctance motor according to claim 1, it is characterized in that: the facewidth of wide tooth (2) is the twice of the facewidth of narrow tooth (3); The facewidth three of the tooth depth of rotor core block (5), the thickness of stator yoke, narrow tooth is equal.
CN201520267436.7U 2015-04-29 2015-04-29 Electric automobile drives with fault tolerant type four phase switch reluctance motor CN204615602U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104821697A (en) * 2015-04-29 2015-08-05 江苏大学 Fault-tolerant type four-phase switch reluctance motor used for driving of electric automobile
CN106655676A (en) * 2017-03-20 2017-05-10 山东理工大学 Five-phase fault-tolerant automotive generator with isolated phases
CN106712339A (en) * 2017-03-20 2017-05-24 山东理工大学 Excitation fault tolerant running electric drum motor
CN106772155A (en) * 2016-12-20 2017-05-31 江苏大学 A kind of method for rapidly judging of switched reluctance machines pole polarity
CN109038871A (en) * 2018-08-31 2018-12-18 南京埃克锐特机电科技有限公司 A kind of on-off reluctance motor with sectional rotor
CN109617354A (en) * 2019-02-03 2019-04-12 哈尔滨工业大学 Rotor half-sinusoid axial magnetic circuit VR Two Speed Resolver
CN109698594A (en) * 2019-02-03 2019-04-30 哈尔滨工业大学 The linear half-wave axial magnetic circuit VR Two Speed Resolver of rotor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104821697A (en) * 2015-04-29 2015-08-05 江苏大学 Fault-tolerant type four-phase switch reluctance motor used for driving of electric automobile
CN106772155B (en) * 2016-12-20 2019-11-05 江苏大学 A kind of method for rapidly judging of switched reluctance machines pole polarity
CN106772155A (en) * 2016-12-20 2017-05-31 江苏大学 A kind of method for rapidly judging of switched reluctance machines pole polarity
CN106655676A (en) * 2017-03-20 2017-05-10 山东理工大学 Five-phase fault-tolerant automotive generator with isolated phases
CN106712339B (en) * 2017-03-20 2018-08-31 山东理工大学 A kind of motorized pulleys motor of excitation fault fault-tolerant operation
CN106712339A (en) * 2017-03-20 2017-05-24 山东理工大学 Excitation fault tolerant running electric drum motor
CN109038871A (en) * 2018-08-31 2018-12-18 南京埃克锐特机电科技有限公司 A kind of on-off reluctance motor with sectional rotor
CN109038871B (en) * 2018-08-31 2020-01-03 南京埃克锐特机电科技有限公司 Switched reluctance motor with segmented rotor
CN109617354A (en) * 2019-02-03 2019-04-12 哈尔滨工业大学 Rotor half-sinusoid axial magnetic circuit VR Two Speed Resolver
CN109698594A (en) * 2019-02-03 2019-04-30 哈尔滨工业大学 The linear half-wave axial magnetic circuit VR Two Speed Resolver of rotor

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Granted publication date: 20150902

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