CN106329773B - Rotor, motor and the vehicle of motor - Google Patents
Rotor, motor and the vehicle of motor Download PDFInfo
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- CN106329773B CN106329773B CN201610799782.9A CN201610799782A CN106329773B CN 106329773 B CN106329773 B CN 106329773B CN 201610799782 A CN201610799782 A CN 201610799782A CN 106329773 B CN106329773 B CN 106329773B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
This disclosure relates to the rotor of motor, motor and vehicle.Motor includes stator and rotor.According to one aspect of the disclosure, rotor may include iron core；The first magnet, the second magnet and the third magnet generally tangential along iron core arranged from outside to inside in the iron core；Wherein two magnets of second magnet pair form the first magnet angle each other, and two magnets of the third magnet pair form the second magnet angle each other, and second magnet angle is less than first magnet angle, and first magnet angle is less than 180 degree.
Description
Technical field
This disclosure relates to vehicle, particularly the motor in vehicle, relates more particularly to for the motor in vehicle
Rotor.
Background technique
In the world today, vehicle has become the essential vehicles of people's work and life.Since petroleum provides
The considerations of in terms of the increasingly nervous and environmental protection in source, pure electric vehicle and hybrid vehicle increasingly cause people's
Pay attention to.There is the demands of the various aspects improved to motor used in pure electric vehicle and hybrid vehicle.
Summary of the invention
The disclosure aims to solve the problem that at least one problem existing in the prior art.
According to one aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes iron core；Magnet slot, institute
Stating magnet slot includes middle section and exterior portion, generally being arranged on tangentially on the iron core along the iron core；Wherein, institute
The thickness for stating the exterior portion of magnet slot is greater than the thickness of the middle section.
According to another aspect of the present disclosure, a kind of motor is provided, the motor includes stator and above-mentioned rotor.
According to the another aspect of the disclosure, a kind of vehicle is provided, the vehicle includes motor, and the motor includes stator
And above-mentioned rotor.
According to the another aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes：Iron core；In the iron
At least two magnet slots arranged in the heart, including the first magnet slot and be arranged in the iron core relative to first magnet slot
Second magnet slot of side；Wherein, have between the end and the outer rim of the rotor of first magnet slot first every magnetic
Magnetic bridge, second magnet slot close on described first between the end of magnetic magnetic bridge and the outer rim of the rotor have second every
Magnetic magnetic bridge, described first every magnetic magnetic bridge width be less than described second every magnetic magnetic bridge width.
According to the another aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes：Iron core；In the iron
The multiple magnet slots arranged from outside to inside in the heart, the both ends of each of the multiple magnet slot side with the iron core respectively
Edge is formed every magnetic magnetic bridge；Wherein magnet slot is got over further away from the center of the rotor, the corresponding width every magnetic magnetic bridge of the magnet slot
It is small.
According to the another aspect of the disclosure, a kind of motor is provided, the motor includes stator and above-mentioned rotor.
According to the another aspect of the disclosure, a kind of vehicle is provided, the vehicle includes motor, and the motor includes stator
And above-mentioned rotor.
According to the another aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes：Iron core；In the iron
In the heart generally along at least two magnet slots of iron core tangential direction, including the first magnet slot and relative to first magnet slot
The second magnet slot being arranged on the inside of the iron core；Wherein, first magnet slot includes intermediate two there are first gap
Magnet slot, second magnet slot include intermediate there are two magnet slots of Second gap, and first gap is less than described the
Two gaps.
According to the another aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes：Iron core；In the iron
The multiple magnet slots generally tangential along the iron core arranged from outside to inside in the heart, at least two in the multiple magnet slot
Including the first magnet slot part and the second magnet slot part and gap between the two；Wherein magnet slot is further away from the rotor
Center, the gap which has is smaller.
According to another aspect of the present disclosure, a kind of motor is provided, the motor includes stator and above-mentioned rotor.
According to the another aspect of the disclosure, a kind of vehicle is provided, the vehicle includes motor, and the motor includes stator
And above-mentioned rotor.
According to the another aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes：Iron core；In the iron
Radially arranged at least three magnets along iron core tangential direction, at least three magnet are disposed in the iron core in the heart
In pre-position, the magnet includes the first magnet arranged from outside to inside along iron core radial direction, the second magnet and
Three magnets, the thickness of second magnet, which is adjusted so that in the case where reluctance torque does not reduce, to be increased between magnets
The thickness of iron core.
According to another aspect of the present disclosure, a kind of motor is provided, the motor includes stator and above-mentioned rotor.
According to the another aspect of the disclosure, a kind of vehicle is provided, the vehicle includes motor, and the motor includes stator
And above-mentioned rotor.
According to the another aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes：Iron core；In the iron
The first magnet, the second magnet and the third magnet generally tangential along iron core arranged from outside to inside in the heart；Wherein the first magnet
Two outermost side ends and the line at iron core center form the first angle, in two outermost side ends of the second magnet and iron core
The line of two outermost side ends and iron core center that the line of the heart forms the second angle and third magnet forms third folder
Angle, first angle are less than second angle, and second angle is less than the third angle.
According to the another aspect of the disclosure, a kind of rotor of motor is provided, the rotor includes：Iron core；In the iron
Arrange from outside to inside in the heart generally along the first tangential magnet of iron core, the second magnet to and third magnet pair；It is wherein described
Two magnets of the second magnet pair form the first magnet angle each other, and two magnets of the third magnet pair form the second magnetic each other
Body angle, second magnet angle are less than first magnet angle, and first magnet angle is less than 180 °.
According to another aspect of the present disclosure, a kind of motor is provided, the motor includes stator and above-mentioned rotor.
According to the another aspect of the disclosure, a kind of vehicle is provided, the vehicle includes motor, and the motor includes stator
And above-mentioned rotor.
Some embodiments of the present disclosure have technical effect that, improve the mechanical strength of rotor.Other realities of the disclosure
Having technical effect that for example is applied, the output torque of motor is improved under the premise of controlling motor manufacturing cost.The disclosure it is another
A little embodiments have technical effect that, reduce the harmonic component in magnetic field, optimize field waveform, so as to improve the performance of motor.
Detailed description of the invention
Fig. 1 shows the schematic side elevation of vehicle according to an embodiment of the present disclosure；
Fig. 2 shows the schematic diagrames of the motor according to an embodiment of the present disclosure including stator and rotor；
It is one group with two magnet slots that Fig. 3, which shows according to an embodiment of the present disclosure be circumferentially arranged in iron core,
The schematic diagram of multiple groups magnet slot；
Fig. 4 shows two magnet slots radially arranged according to an embodiment of the present disclosure, Fig. 3 one group of magnet slot
Enlarged drawing；
It is one group with three magnet slots that Fig. 5, which shows according to an embodiment of the present disclosure be circumferentially arranged in iron core,
The schematic diagram of multiple groups magnet slot；
Fig. 6 shows three magnet slots radially arranged according to an embodiment of the present disclosure, Fig. 5 one group of magnet slot
Enlarged drawing；
Fig. 7 shows the another of three magnet slots according to an embodiment of the present disclosure, radially arranged in one group of magnet slot
One exemplary enlarged drawing；
Fig. 8 shows showing for two magnet slots according to an embodiment of the present disclosure, radially arranged in one group of magnet slot
Example；
Fig. 9 shows two magnet slots radially arranged according to an embodiment of the present disclosure, Fig. 8 one group of magnet slot
Enlarged drawing；
Figure 10 show two outermost side ends of magnet that is according to an embodiment of the present disclosure, being arranged in magnet slot with
The schematic diagram at the magnet angle of angle and magnet pair that the line at iron core center is formed；
Figure 11 shows the coordinate system transformation and dq shaft model current phasor figure of permanent magnet synchronous motor；
Figure 12 shows the relationship between reluctance torque and magnet thickness；
Figure 13 shows magnetic potential caused by each magnet and is superimposed the schematic diagram to form sinusoidal waveform；
Figure 14 shows the corresponding air gap flux density of angle displacement of different air gap center lines；
Figure 15 shows the relationship between air gap flux density and air gap flux density harmonic order.
Specific embodiment
The various exemplary embodiments of the disclosure are described in detail below with reference to the accompanying drawings.It is to be understood that various realities
The description for applying example is merely illustrative, not as any restrictions of the technology to the disclosure.Unless specifically stated otherwise, showing
Component and the positioned opposite of step, expression formula and the unlimited the scope of the present disclosure processed of numerical value in example property embodiment.
Term used herein, it is only for description specific embodiment, and it is not intended to limit the disclosure.On unless
Hereafter clearly it is further noted that " one " of singular used herein and "the" are intended to equally include plural form.Also want
Understand, one word of "comprising" as used herein, illustrate there are pointed feature, entirety, step, operation, unit and/
Or component, but it is not excluded that in the presence of or increase one or more of the other feature, entirety, step, operation, unit and/or component
And/or their combination.Those skilled in the art are to be further understood that term " about " used herein is intended to illustrate
The numerical value documented by possible measurement error or foozle make covers certain rational change range.
Referring now to Figure 1, Fig. 1 shows the schematic side elevation of vehicle according to an embodiment of the present disclosure.Normally, vehicle
10 may include vehicle body 12, multiple wheel 14 and automotive powers 16 being supported on vehicle body 12 on tread etc..It should
Automotive power 16 may include at least one motor.
It should be understood that automotive power used herein can widely include the tool that can be used in pushing vehicle
There is any automotive power of one or more motors.The automotive power can be used for such as pure electric vehicle and mix
Close power car.In the dynamical system of hybrid vehicle, at least one motor can be pushed away serially or parallelly with engine
The traveling of motor-car.The example of hybrid vehicle can include but is not limited to plug-in hybrid vehicle, double mode mixing
Power car, full hybrid vehicle, extended-range hybrid vehicle, power-assisted hybrid vehicle, light hybrid
Vehicle, serial mixed power vehicle, parallel hybrid vehicles, series-parallel hybrid vehicle, fluid power mixing are dynamic
Power vehicle, power dividing type hybrid vehicle, BAS hybrid vehicle and any other type hybrid vehicle.
Vehicle in the disclosure can be configured as car, sports type vehicle, truck, bus, commercial vehicle, transboundary vehicle, recreation vehicle etc..
It should be understood that the technology of the disclosure can be used for above-mentioned any automotive power, and it is not limited to a certain specific type.
As shown in Figure 1, in some embodiments, automotive power 16 usually may include power supply 24, inverter 20, control
Unit 18, motor 22 and input unit 26 processed.As described above, automotive power 16 can be arranged and/or be matched using other
It sets, but normally includes at least one motor.In some embodiments, motor 22 is operatively connected at least one wheel
14, apply torque to wheel 14 to drive vehicle 10.
Power supply 24 can directly or indirectly provide power to motor 22.Power supply 24, such as battery may include one
Or multiple battery units, and can be using lithium ion, nickel metal hydride, sodium nickel chloride, ni-Cd and any suitable its
His battery technology.
Inverter 20 operably interconnects power supply 24 and motor 22.Inverter 20 can receive direct current from power supply 24
Electricity is converted into alternating current, and alternating current is passed to motor 22.
Control unit 18 is operatively connected to inverter 20, to control inverter 20.Control unit 18 can be
One or more general digital computers or data processing equipment, usually can include but is not limited to processor or microprocessor
Or central processing unit, memory (such as, but not limited to read-only memory, random access memory, electrically erasable
Read memory), input/output device or device, analog-digital converter or conversion circuit, digital analog converter or conversion electricity
Road, clock etc..Control unit 18, which can be configured as, to be executed program instructions, which can store in control unit 18
Memory or other other storage devices appropriate associated with control unit 18 in.Control unit 18 can be via inversion
Device 20 controls motor.
In some embodiments, vehicle 10 can also include input unit 26, and input unit 26 is operatively connected to
Control unit 18.Driver's operation input device 26 of vehicle turns to control the output of motor 22 via control unit 18
Square.In some embodiments, input unit 26 selectively includes pedal, and control unit 18 is passed through in response to the location status of pedal
The size for being transmitted to the electric power of motor 22 is adjusted by inverter, to adjust the output torque of motor 22.
Fig. 2 shows the schematic diagrames of the motor 22 according to an embodiment of the present disclosure including stator and rotor.This field skill
Art personnel it will be appreciated that though following disclosure combination permanent magnet synchronous motor describes multiple embodiments of the disclosure, however this
It is not intended to the essence of each embodiment of the disclosure and spirit being restricted to specific motor type.The reality recorded according to the disclosure
Example is applied, the spirit of each embodiment therein and essence reasonably can be expanded to other motors by those skilled in the art.
Specifically, as shown in Fig. 2, motor 22 usually may include rotor portion and stationary part, stationary part can position
In the outside of rotor portion, wherein stationary part may include stator core 202 and stator coil 200.Stator coil 200 can be with
It is uniformly distributed in around rotor periphery, stator coil 200 can be formed using coilings such as flat type copper wires.Rotor portion can wrap
Include rotor core 204, magnet slot 206 and the shaft 208 positioned at rotor center position.Rotor portion further includes being inserted into magnet
Magnet in slot 206.Wherein magnet can use a variety of permanent-magnet materials, can include but is not limited to alnico (AlNiCo), iron
Oxysome, Rare-Earth Cobalt, neodymium iron boron and binding electromagnetic material etc..It in the design can be according to the size, defined to air-gap field
The various factors such as motor performance index, the stability of magnetic property, mechanical performance, convenience, the economic cost of processing and assembly are wanted
It asks and permanent-magnet material is selected.
It is described below for the structure feature of magnet slot.
According to some embodiments of the present disclosure, rotor may include rotor core and magnet slot, which may include
Middle section and exterior portion, generally being arranged on tangentially in rotor core along rotor core, the wherein outside of the magnet slot
Partial thickness can be greater than the thickness of middle section.Specifically, according to some embodiments of the present disclosure, as shown in Fig. 2, rotor
May include iron core 204 and along rotor circumference uniformly or multiple groups magnet slot of the nonuniform mutation operator in iron core 204.Implement at one
In example, magnet slot is generally along the arranged tangential of iron core 204.Every group of magnet slot may include one or more magnet slots (in Fig. 2
Illustrate only one), magnet slot 206 may include middle section 212 (shown in the shadow) and be located on the outside of middle section 212
Exterior portion 210.Although showing exterior portion 210 in attached drawing 2 is located at 212 two sides of middle section, however, the disclosure is not
It is only limitted to this, exterior portion 210 can be located only within the side of middle section 212.Magnet can be arranged in the middle part of rotor
Divide in 212 (can be inserted into or be embedded into magnet slot for magnet by a variety of connection types such as bonding agent, card slot, fastener).Magnetic
Body slot 206 can use a variety of other structures and shape that can be realized the function that rotor plays in motor, may include but
It is not limited to the U-shaped of integral form, the L shape of separate form, linear type, V-arrangement etc..
According to one embodiment of the disclosure, the thickness of exterior portion 210 can be greater than the thickness of the middle section 212.
As it was noted above, the middle section 212 of magnet slot will accommodate magnet, exterior portion 210 will accommodate air as a result,.It is transported in motor
When turning, above-mentioned arrangement can play the role of increasing reluctance torque, and then increase output torque.On the other hand, due to outside portion
What is accommodated in points 210 is air, therefore the thickness for increasing exterior portion 210 can't extraly increase the dosage of magnet.That is,
The manufacturing cost of motor is not will increase while increasing motor performance according to above-described embodiment of the disclosure, and more empty
Air drain can reduce the quality of iron core, further increase power/torque mass density.
As it was noted above, every group of magnet slot may include one or more magnet slots according to some embodiments of the present disclosure.
Fig. 3 shows the multiple groups magnet according to an embodiment of the present disclosure that be one group with two magnet slots being circumferentially arranged in iron core
The schematic diagram of slot.Specifically, as shown in figure 3, multiple groups magnet slot is circumferentially arranged in rotor core 300 respectively.Every group of magnetic
Body slot may include the first magnet slot 302 and the second magnet slot 304.In one embodiment, the second magnet slot 304 for example can be with
The inside of rotor core 300 is arranged in relative to the first magnet slot 302.In one embodiment, the first magnet slot 302 and second
Magnet slot 304 can have the substantially the same axis of symmetry, which can be generally along the radial direction of rotor core 300
Direction, as shown in the vertical dotted line in Fig. 5.Wherein, the first magnet slot 302 may include corresponding first exterior portion
306 and first middle section 308, and the second magnet slot 304 may include among corresponding second exterior portion 310 and second
Part 312.It will be appreciated by those skilled in the art that although showing the first exterior portion 306 and the second exterior portion in Fig. 3
310 are located at the two sides of the first middle section 308 and the second middle section 312, however during exterior portion can also be only located at
Between part side (not shown).As it was noted above, as long as the thickness of exterior portion is greater than the thickness of middle section, so that it may rise
To the effect for increasing reluctance torque in the case where not increasing magnet steel dosage and cost.As shown, two magnet slots and rotor
It can be respectively provided between outer rim every magnetic magnetic bridge 320 and 322.In addition, the dash area expression in figure is arranged in the first middle part
Points 308 and the second magnet in middle section 312.
Fig. 4 shows two magnet slots radially arranged according to an embodiment of the present disclosure, Fig. 3 one group of magnet slot
Enlarged drawing.As shown, the thickness of the first exterior portion 306 can be indicated with width1, the thickness of the first middle section 308
It can be indicated with mh1, similarly, the thickness of the second exterior portion 310 can be indicated with width2, the second middle section 312
Thickness can be indicated with mh2.According to some embodiments of the present disclosure, the thickness of the corresponding exterior portion 306 of the first magnet slot 302
The thickness of middle section 308 can be greater than, i.e. width1 can be greater than mh1；The corresponding outside portion of the second magnet slot 304 and/or
Mh2 can be greater than greater than the thickness of middle section 312, i.e. width2 by dividing 310 thickness.As it was noted above, in this way
Configuration, can play increase reluctance torque so that increase motor output torque effect, further increase power/torque matter
Metric density.
According to some embodiments, in the case where the diameter of the rotor of motor is 140mm, the range of width1 and width2
It can be about 2.8- about 3.8mm.Mh1's and mh2 can range from about 2.4- about 3.4mm.It is in the diameter of the rotor of motor
In the case where 170mm, width1 and width2's can range from about 3.4- about 4.7mm.Mh1's and mh2 can range from about
2.9- about 4.2mm.Above-mentioned numberical range is only exemplary, and those skilled in the art can select other according to concrete application
Suitable numerical value.
In addition, being directed to the first magnet slot and the second magnet slot, can be played in motor using a variety of rotors that can be realized
Function structure and shape, can include but is not limited to the U-shaped of integral form, the L shape of separate form, linear type, V-arrangement etc. with
And any combination of them.For clarity rather than the purpose of limitation, the magnet slot using L shape or U-shaped is as showing here
Example.Specifically, as shown in figure 3, according to some embodiments of the present disclosure, the first magnet slot 302 is U-shaped magnet slot, the second magnet
Slot 304 may include a pair of L-shaped magnet slot, this can be arranged symmetrically magnet slot, and gap can be formed among the two
314.This may include corresponding exterior portion and the adjacency section adjacent with the exterior portion to each magnet slot in magnet slot
Point, for example, exterior portion 310 and adjacent part 316 in figure, the exterior portion and adjacent part generally form L shape,
The corresponding adjacent part 316 of each of a pair of magnets slot described here constitutes in the second magnet slot described above
Between part 312, wherein the thickness of exterior portion 310 be greater than adjacent part 316 thickness.In addition, L-shaped magnet slot can have
Away from the opening of rotor center.In other embodiments, it will be understood by those skilled in the art that the L-shaped magnet slot can also be with
With the opening towards other directions.
According to the other embodiment of the disclosure, the first magnet slot and the second magnet slot may each comprise centre and there is sky
A pair of L-shaped magnet slot of gap.According to other embodiments, the first magnet slot and the second magnet slot may each be U-shaped magnet slot.Root
According to other embodiments, the first magnet slot may include above-mentioned centre there are a pair of L-shaped magnet slot in gap, and the second magnetic
Body slot can be U-shaped magnet slot.
Further, Fig. 5 show it is according to an embodiment of the present disclosure be circumferentially arranged in iron core with three magnetic
The schematic diagram for the multiple groups magnet slot that body slot is one group.Rotor shown in fig. 5 may include the first magnet slot 502, relative to first
Magnet slot 502, which is arranged in the second magnet slot 504 of 500 inside of rotor core and is arranged in relative to the second magnet slot 504, to be turned
The third magnet slot 506 of sub- 500 inside of iron core.First magnet slot 502, the second magnet slot 504 and third magnet slot 506 can be with
With the substantially the same axis of symmetry radially, as shown in dotted line vertical in Fig. 5.Wherein, the first magnet slot 502
It may include corresponding exterior portion 510 and middle section 512, the second magnet slot 504 may include corresponding exterior portion 514
With middle section 516, third magnet slot 506 may include corresponding exterior portion 518 and middle section 520.The rotor may be used also
To include the magnet in the middle section for be arranged in the first magnet slot 502, the second magnet slot 504 and third magnet slot 506, such as scheme
(magnet can be inserted into or be embedded into magnetic by a variety of connection types such as bonding agent, card slot, fastener shown in 5 dash area
In body slot).
Fig. 6 shows three magnet slots radially arranged according to an embodiment of the present disclosure, Fig. 5 one group of magnet slot
Enlarged drawing.As shown in fig. 6, the thickness of the exterior portion 510 of the first magnet slot 502 can be indicated with width1, the first magnet
The thickness of the middle section 512 of slot 502 can indicate with mh1, similarly, the thickness of the exterior portion 514 of the second magnet slot 504
It can be indicated with width2, the thickness of the middle section 516 of the second magnet slot 504 can be indicated with mh2；Third magnet slot 506
The thickness of exterior portion 518 can indicate that the thickness of the middle section 520 of third magnet slot 506 can use mh3 with width3
It indicates.According to some embodiments of the present disclosure, the thickness of the corresponding exterior portion 510 of the first magnet slot 502 can be greater than centre
The thickness of part 512, i.e. width1 can be greater than mh1；And/or the thickness of the corresponding exterior portion 514 of the second magnet slot 504 can
To be greater than the thickness of middle section 516, i.e. width2 is greater than mh2；And/or the corresponding exterior portion 518 of third magnet slot 506
Thickness can be greater than the thickness of middle section 520, i.e. width3 can be greater than mh3.
According to some embodiments of the present disclosure, as shown in figure 5, the first magnet slot can be U-shaped magnet slot, the second magnet slot
It may include that there are two generally L-shaped magnet slots in gap for centre with third magnet slot.Herein to implementation shown in fig. 5
The description that example carries out is solely for the purpose of illustration, as it was noted above, in some embodiments, the first magnet slot, the second magnetic
Body slot and third magnet slot can be selected as one of the L shape of U-shaped and separate form.Those skilled in the art will also be understood that
For the first magnet slot, the second magnet slot and third magnet slot, it can be realized what rotor played in motor using a variety of
The other structures and shape of function, can include but is not limited to linear type, V-arrangement etc. and any combination of them.
The structure of the rotor according to the disclosure is further illustrated below.It usually can be with cloth on the stator of permanent magnet synchronous motor
It is equipped with three-phase symmetric winding, may include magnet on rotor to provide excitation, air-gap field can be passed through between stator and rotor
Electromagnetic coupling relationship occurs, to carry out the conversion between mechanical energy and electric energy.It generally, can will forever for easy analysis
Model of the magnetic-synchro motor in the case where the model conversion under three-phase static coordinate system is rotor synchronous rotary dq coordinate system.Figure 11 is shown
Between permanent magnet synchronous motor three-phase static coordinate system, stator two-phase α β rest frame and rotor synchronous rotary dq coordinate system
Relationship.As shown in figure 11, I is stator current resultant vector, idAnd iqRespectively indicate d axis equivalent current and q axis equivalent current.Its
In in stator two-phase stationary coordinate system, α axis is overlapped with the A phase axis of three-phase static coordinate system, β axis 90 degree of electricity of advanced α axis
Angle.In rotor synchronous rotary dq coordinate system, the pole the N central axis in the magnetic field that rotor is generated will surpass as d-axis (d axis)
The position of preceding 90 degree of electrical angles of d-axis is as quadrature axis (q axis).Normally, first the equation under three-phase static coordinate system can be passed through
Clarke converts to obtain the equation under α β two-phase stationary coordinate system, then converts to obtain the equation under dq coordinate system by Park.
It can be seen from figure 11 that Ea is the counter electromotive force of motor, the direction of Ea is identical as q axis direction, and ψ is the magnetic linkage of magnet, the direction of ψ
It is identical with d axis direction.
By being converted, the equivalent voltage U of available d axis and q axisdAnd Uq, as shown in Equation 1.
Ud=Rid+Ldi’d-ωLqiq
Uq=Riq+Lqi’q+ω(Ldid+ψ) (1)
Wherein, ω is the rotation angular rate of rotor, LdAnd LqIt is d axis and q axle inductance respectively, R is the phase electricity of every phase winding
Resistance, i 'dAnd i 'qIt is i respectivelydAnd iqTime-derivative.
And then using the 3/2 transformation principle for keeping amplitude constant, the electromagnetic power P of available permanent magnet synchronous motorc, such as
Shown in formula 2.
Pc=3/2 (Udid+Uqiq[the ω ψ i of)=3/2q+ω(Ld-Lq)idiq] (2)
The electromagnetic torque of permanent magnet synchronous motor is the electromagnetic power of motor and mechanical angular speed is divided by as a result, therefore can be with
Output torque T of the three-phase p to the internal permanent magnet synchronous motor of pole under dq coordinate system is obtained, output torque T can be by two
It is grouped as, a part is permanent-magnet torque 3/2p ψ iq, another part is reluctance torque 3/2p (Ld-Lq)idiq。
T=3/2p ψ iq+3/2p(Ld-Lq)idiq (3)
According to fig. 2-embodiment shown in fig. 5, by making the thickness of exterior portion of magnet slot be greater than middle section
Thickness, d axis magnetic resistance are increased.Due to can approximatively think d axis magnetic resistance and d axle inductance LdIt is inversely proportional, therefore d axle inductance LdSubtract
It is small.It can make L in the case where the variation of q axle inductance is littledAnd LqDifference increase so that reluctance torque T increase.Into
One step, due to it is increased be the thickness of the air-gap in magnet slot, increase in the case where no increase magnet dosage
The output torque of motor.
It is described below for the feature every magnetic magnetic bridge formed between rotor periphery and magnet slot.In the design of motor
In, cause magnet material utilization rate too low in order not to keep the magnetic leakage factor of the magnet in motor excessive, generallys use certain
Every magnetic measure, for example, being arranged every magnetic magnetic bridge, as shown in the appended drawing reference 214 in Fig. 2 between magnet slot and rotor periphery.It is logical
Crossing makes to have the function that saturation every the magnetic flux of magnetic magnetic bridge part to play limitation leakage field.It is smaller every the width of magnetic magnetic bridge, this part
Magnetic resistance will be bigger, can more limit leakage magnetic flux.
According to some embodiments of the present disclosure, rotor includes at least two magnet slots arranged in rotor core, including
First magnet slot and it is arranged in the second magnet slot on the inside of iron core relative to the first magnet slot, wherein an end of the first magnet slot
Have between end and the outer rim of rotor first every magnetic magnetic bridge, the second magnet slot closes on the first end and rotor every magnetic magnetic bridge
Have between outer rim second every magnetic magnetic bridge, first every magnetic magnetic bridge width less than second every the width of magnetic magnetic bridge.
Specifically, according to some embodiments of the present disclosure, as shown in figure 3, multiple groups magnet slot can be circumferentially uniform or non-
It is evenly arranged in rotor core 300, may include the first magnet slot 302 and the second magnet slot 304 for every group of magnet slot,
Second magnet slot 304 can be arranged in the inside of rotor core 300 relative to the first magnet slot 302.In one embodiment,
One magnet slot 302 and the second magnet slot 304 can have substantially the same symmetry axis radially, vertical such as Fig. 3
Dotted line shown in.In addition, rotor can also include the magnet being arranged in magnet slot, as shown in the dash area in figure.Such as figure
Shown, the first magnet slot 302 can form first every magnetic magnetic bridge between the end of symmetry axis side and the outer rim of rotor
320, and neighbouring the first of the second magnet slot 304 can form second every magnetic between the end and rotor periphery of magnetic magnetic bridge 320
Magnetic bridge 322.In accordance with an embodiment of the present disclosure, first every magnetic magnetic bridge 320 width less than second every the width of magnetic magnetic bridge 322.It is logical
Such arrangement is crossed, can more effectively utilize every magnetic magnetic bridge come the effect of meeting with stresses, so as to improve mechanical stability and increase
Big mechanical strength, for balancing the contradiction of leakage field Yu rotor mechanical strength.
As shown in Fig. 4 as enlarged drawing, first indicates that second every magnetic magnetic bridge 322 with L31 every the width of magnetic magnetic bridge 320
Width indicated with L32, wherein first can be less than second every the width of magnetic magnetic bridge 322, i.e. L31 every the width of magnetic magnetic bridge 320
Less than L32.
Alternatively, or in addition, as shown in figure 3, according to some embodiments of the present disclosure, the first magnet slot 302 be located at pair
Claim to can have the 4th between the end of the axis other side and the outer rim of rotor every magnetic magnetic bridge 324, neighbouring the of the second magnet slot 304
Four can have the 5th every magnetic magnetic bridge 326 between the end of magnetic magnetic bridge 324 and the outer rim of rotor.According to the implementation of the disclosure
Example, the 4th every magnetic magnetic bridge 324 width less than the 5th every the width of magnetic magnetic bridge 326.
As shown in Fig. 4 as enlarged drawing, the 4th can indicate that the 5th every magnetic magnetic bridge every the width of magnetic magnetic bridge 324 with L33
326 width can indicate with L34, and the 4th every magnetic magnetic bridge 324 width less than the 5th every the width of magnetic magnetic bridge 326, i.e.,
L33 is less than L34.Further, according to some embodiments of the present disclosure, as shown in figure 5, rotor may include the first magnet slot
502, relative to the first magnet slot 502 it is arranged in the second magnet slot 504 of the inside of rotor core 500 and relative to the second magnet
Slot 504 is arranged in the third magnet slot 506 of 500 inside of rotor core.In one embodiment, the first magnet slot 502, the second magnetic
Body slot 504 and third magnet slot 506 can have substantially the same symmetry axis radially, such as the vertical void in Fig. 5
Shown in line.Wherein, the first magnet slot 502 between the end of the symmetry axis side and the outer rim of rotor can form first
Every magnetic magnetic bridge 526, neighbouring the first of the second magnet slot 504 can form the between the end and rotor periphery of magnetic magnetic bridge 526
Two every magnetic magnetic bridge 528, and neighbouring the second of third magnet slot 506 can have between the end and rotor periphery of magnetic magnetic bridge 528
There is third every magnetic magnetic bridge 530.First every magnetic magnetic bridge 526 width less than second every the width of magnetic magnetic bridge 528, and second every magnetic
The width of magnetic bridge 528 is less than third every the width of magnetic magnetic bridge 530.
As shown in Fig. 6 as enlarged drawing, first can indicate that second every magnetic magnetic bridge every the width of magnetic magnetic bridge 526 with L51
528 width can indicate that third can be indicated every the width of magnetic magnetic bridge 530 with L53 with L52.Wherein first every magnetic magnetic bridge 526
Width less than second every the width of magnetic magnetic bridge 528, i.e. L51 is less than L52.In addition, second every magnetic magnetic bridge 528 width less than
Three every magnetic magnetic bridge 530 width, i.e. L52 can be less than L53.
In addition, according to some embodiments of the present disclosure, as shown in figure 3, the first magnet slot can be U-shaped magnet slot, second
Magnet slot may include that there are two generally L-shaped magnet slots in gap for centre, carry out herein to embodiment shown in Fig. 3
Description be solely for the purpose of illustration.For the first magnet slot, the second magnet slot, other can be can be realized using a variety of
The structure and shape for the function that rotor plays in motor can include but is not limited to the U-shaped of integral form, the L of separate form
Shape, linear type, V-arrangement etc. and any combination of them.
Alternatively, or in addition, go to Fig. 5 and Fig. 6, the end positioned at the symmetry axis other side of the first magnet slot 502 with turn
The 4th can be formed between the outer rim of son every magnetic magnetic bridge 532, the neighbouring end every magnetic magnetic bridge 532 of the second magnet slot 504 with turn
The 5th can be formed between the outer rim of son can be adjacent to the 4th every 532 cloth of magnetic magnetic bridge every magnetic magnetic bridge 534 every magnetic magnetic bridge 534, the 5th
It sets, and the 4th can be less than the 5th every the width of magnetic magnetic bridge 534 every the width of magnetic magnetic bridge 532.In addition, third magnet slot 506
It is neighbouring the 6th can be formed between the end of magnetic magnetic bridge 534 and the outer rim of rotor every magnetic magnetic bridge 536, the 6th every magnetic magnetic bridge
536 the neighbouring 5th can arrange every magnetic magnetic bridge 534, wherein the 5th can be less than the 6th every magnetic magnetic bridge every the width of magnetic magnetic bridge 534
536 width.
As shown in Fig. 6 as enlarged drawing, the 4th can indicate that the 5th every magnetic magnetic bridge every the width of magnetic magnetic bridge 532 with L54
534 width can indicate with L55, and the 6th can be indicated every the width of magnetic magnetic bridge 536 with L56.Wherein the 4th every magnetic magnetic bridge 532
Width can be less than the 5th every the width of magnetic magnetic bridge 534, i.e. L54 can be less than L55.In addition, the 5th every magnetic magnetic bridge 534 width
Degree can be less than the 6th every the width of magnetic magnetic bridge 536, i.e. L55 can be less than L56.
According to some embodiments of the present disclosure, as shown in figure 5, first every magnetic magnetic bridge 526 in the manufacture of actual rotor
Width range can be about 0.8- about 1.4mm, and second can be about 1.0- about 1.6mm every the width range of magnetic magnetic bridge 528, and
Third can be about 1.2- about 1.8mm every the width range of magnetic magnetic bridge 530.Similarly, the 4th every magnetic magnetic bridge 532 width range
It can be about 0.8- about 1.4mm, the 5th can be about 1.0- about 1.6mm every the width range of magnetic magnetic bridge 534, and the 6th every magnetic
The width range of magnetic bridge 536 can be about 1.2- about 1.8mm.Above-mentioned numberical range is only exemplary, those skilled in the art
Member can select other suitable numerical value according to concrete application.
According to some embodiments of the present disclosure, as shown in figure 5, the first magnet slot can be U-shaped magnet slot, the second magnet slot
It may include that there are two generally L-shaped magnet slots in gap for centre with third magnet slot, herein to implementation shown in fig. 5
The description that example carries out is solely for the purpose of illustration.For the first magnet slot, the second magnet slot and third magnet slot, can adopt
With a variety of other structures and shape that can be realized the function that rotor plays in motor, integral form can include but is not limited to
U-shaped, the L shape of separate form, linear type, V-arrangement etc. and any combination of them.
In addition, the magnet slot of U-shaped can have the opening away from rotor center, it will be appreciated by those skilled in the art that herein
Opening direction is only schematical, and the magnet slot of the U-shaped also can have the opening towards other directions.L-shaped magnet slot can
To have the opening away from rotor center, it will be appreciated by those skilled in the art that opening direction herein is only schematical, the L shape
Magnet slot also can have the opening towards other directions.
Fig. 7 shows the another of three magnet slots according to an embodiment of the present disclosure, radially arranged in one group of magnet slot
One exemplary enlarged drawing.According to some embodiments of the present disclosure, as shown in fig. 7, rotor may include radially by outside to
The first magnet slot, the second magnet slot and the third magnet slot being inside arranged successively, the first magnet slot and the second magnet slot can be U-shaped
Magnet slot, third magnet slot may include that there are the generally L-shaped magnet slots in gap for two centres.Wherein the first magnet slot with
Width can be formed between magnetic magnetic bridge, the second magnet slot and rotor periphery for the first of L1 with formation width between rotor periphery
Degree be L2 second between magnetic magnetic bridge, third magnet slot and rotor periphery can with formation width for L3 third every magnetic magnetic bridge,
And first can be less than third every the width L3 of magnetic magnetic bridge every the width L1 of magnetic magnetic bridge, and third is every the width L3 of magnetic magnetic bridge
It can be less than second every the width L2 of magnetic magnetic bridge.
According to some embodiments of the present disclosure, rotor may include rotor core and arrange from outside to inside in rotor core
Multiple magnet slots of column, the both ends of each magnet slot can form two every magnetic magnetic bridge with the edge of rotor core respectively, wherein
For magnet slot further away from the center of rotor, the corresponding width every magnetic magnetic bridge of the magnet slot can be smaller.Specifically, with Fig. 3 and Fig. 4
For be illustrated, every magnetic magnetic bridge 320 width L31 can be less than every magnetic magnetic bridge 322 width L32, every the width of magnetic magnetic bridge 324
Spending L33 can be less than the width L34 every magnetic magnetic bridge 326.In addition, by taking Fig. 5 and Fig. 6 as an example, it can every the width L51 of magnetic magnetic bridge 526
To be less than the width L52 every magnetic magnetic bridge 528, the width L53 every magnetic magnetic bridge 530 can be less than every the width L52 of magnetic magnetic bridge 528.
The width L55 every magnetic magnetic bridge 534 can be less than every the width L54 of magnetic magnetic bridge 532, can be less than every the width L55 of magnetic magnetic bridge 534
Every the width L56 of magnetic magnetic bridge 536.
It is described below for the gap between a pair of magnets slot.
According to some embodiments of the present disclosure, rotor may include rotor core and in rotor core generally along iron
At least two magnet slots of heart tangential direction, including the first magnet slot and be arranged on the inside of rotor core relative to the first magnet slot
The second magnet slot, wherein the first magnet slot may include centre there are two magnet slots of first gap, the second magnet slot can
To include centre there are two magnet slots of Second gap, the first gap can be less than the second gap.Fig. 8 is shown according to this public affairs
The example of the embodiment opened, intermediate two magnet slots with gap.
Specifically, as shown in figure 8, rotor include iron core 800, arrangement iron core in the first magnet slot 802 and relative to
First magnet slot 802 is arranged in the second magnet slot 804 of 800 inside of iron core.In one embodiment, 802 He of the first magnet slot
Second magnet slot 804 can have substantially the same symmetry axis radially.In one embodiment, the first magnet slot
802 may include the magnet slot 806 and magnet slot 808 to form the first magnet slot pair.Magnet slot 806 may include exterior portion
840 and the adjacent part 810 adjacent with exterior portion 840, the exterior portion 840 and adjacent part 810 can generally form L
Shape.Magnet slot 808 also may include generally forming L-shaped exterior portion 842 and the adjacent part adjacent with exterior portion
812.The first gap 814 can be formed between adjacent part 810 and adjacent part 812.Similarly, the second magnet slot 804 can
To include the magnet slot 816 and magnet slot 818 to form the second magnet slot pair.Magnet slot 816 may include generally form it is L-shaped
Exterior portion 844 and the adjacent part 820 adjacent with exterior portion.Magnet slot 818 also may include generally forming outside L-shaped
Side section 846 and the adjacent part 822 adjacent with exterior portion.It can be formed between adjacent part 820 and adjacent part 822
Second gap 824.In accordance with an embodiment of the present disclosure, the length in the first gap 814 can be less than the length in second gap 824.
By this arrangement, can the effect of more effectively being met with stresses using above-mentioned gap, simultaneously so as to improve mechanical stability
And the mechanical strength of rotor is increased, and utmostly reduce leakage field, improve motor performance.
Further, Fig. 9 shows radially arranged according to an embodiment of the present disclosure, Fig. 8 one group of magnet slot
The enlarged drawing of two magnet slots.Wherein the length in the first gap 814 is indicated with d1, and the length in the second gap 824 is indicated with d2, and
And first gap 814 length d1 less than the second gap 824 length d2.In the practical manufacture of rotor, first gap 814
Length range can be about 0.8- about 1.4mm, the length range in second gap 824 can be about 1.0- about 1.6mm.It is above-mentioned
Numberical range is only exemplary, and those skilled in the art can select other suitable numerical value according to concrete application.
In addition, above-mentioned L-shaped magnet slot can have the opening away from rotor center, however those skilled in the art answer
Work as understanding, above-mentioned L-shaped magnet slot also can have the opening towards other directions.
In addition, the rotor can also include the adjacency section for being arranged in the first magnet slot according to some embodiments of the present disclosure
Divide the magnet in the adjacent part 820,822 of the 810,812 and second magnet slot (bonding agent, card slot, fastener etc. can be passed through
Magnet is inserted into or is embedded into magnet slot by a variety of connection types), as shown in the dash area of Fig. 8.
According to some embodiments of the present disclosure, as shown in figure 8, between the first magnet slot 802 and the outer rim of rotor core 800
Can also be formed between magnetic magnetic bridge 826, the second magnet slot 804 and the outer rim of rotor core 800 can also form every magnetic magnetic bridge
828.It can be similarly formed in the other side of symmetry axis every magnetic magnetic bridge, details are not described herein.
Although describing the gap between magnet slot in conjunction with Fig. 8, however, it will be appreciated by persons skilled in the art that originally
Disclosed embodiment disclose arranged from outside to inside on iron core generally along the tangential multiple magnet slots of the iron core, magnetic
Body slot is further away from the center of rotor, then the smaller embodiment in the gap that the magnet slot has.For example, in some embodiments, it is more
A part of in a magnet slot can not have gap.Such as shown in figure 5, it is located furthest from the magnet slot 502 of rotor center
The approximation for being formed as whole is U-shaped, wherein and not having gap.And there is gap 522 and 524 in magnet slot 504 and 506.According to
The present embodiment, the length that above-mentioned gap should meet gap 522 are less than the length in gap 524.
It will be understood by those skilled in the art that embodiment shown in fig. 5 also may include such as magnet although not showing that
Slot 502 has gap, and magnet slot 504 does not have gap, and magnet slot 506 has the situation in gap.In this case, according to this
Open, gap still meets center of the magnet slot further away from rotor, and the gap which has is smaller.That is, magnet slot 502
Gap be less than magnet slot 506 gap.By above structure, the mechanical strength of rotor can be improved and improve the machinery of rotor
Stability.
In the present embodiment, the shape of magnet slot can have other selections of various reasonable.For example, in Fig. 5 and Fig. 8 institute
In the embodiment shown, although the exterior portion and adjacent part of the magnet slot 504,506 with gap generally constitute L-type, so
And they may have other reasonable shapes, such as "-" type or V-type etc..In another example not having shown in attached drawing 5
The magnet slot 502 in gap be it is generally U-shaped, however, it is also possible to linear type, V-arrangement and various other proper shapes.This
Outside, in the embodiment shown in fig. 8, the corresponding first part 806 of the first magnet slot 802 and second part 808 generally can be with
It is L shape, alternatively, or in addition, the corresponding first part 816 of the second magnet slot 804 and second part 818 generally can be L
Shape.However, they may have other reasonable shapes according to the disclosure.
It is described below for the thickness characteristics of the iron core between magnet.
According to some embodiments of the present disclosure, rotor may include iron core and radially arranged edge in the iron core
At least three magnets of iron core tangential direction, at least three magnet are disposed in the pre-position in the iron core, institute
Stating magnet includes the first magnet, the second magnet and third magnet arranged from outside to inside along iron core radial direction, second magnetic
The thickness of body is adjusted so that the thickness for increasing iron core between magnets in the case where reluctance torque does not reduce.
According to some embodiments of the present disclosure, as shown in figure 5, rotor may include being arranged in iron core 500 from outside to inside
The first magnet 512, the second magnet 516 and third magnet 520.First magnet 512, the second magnet 516 and third magnet 520
It is placed on the pre-position in iron core.First magnet 512, the second magnet 516 and third magnet 520 can have generally phase
Same symmetry axis radially, as shown in the dotted line of the vertical direction of Fig. 5.First magnet 512, the second magnet 516 and
Three magnets 520 can be arranged in the middle section of the first magnet slot 502, the second magnet slot 504 and third magnet slot 506
In.In some embodiments, in conjunction with Fig. 5 and Fig. 6, the thickness of the first magnet 512 is the middle section of the first magnet slot 502
Thickness mh1, the thickness of the second magnet 516 are the thickness mh2 of the middle section of the second magnet slot 504, the thickness of third magnet 520
Degree is the thickness mh3 of the middle section of third magnet slot 506.It in this configuration, can be by reducing the second magnet 516
Thickness mh2, to increase the thickness of the corresponding core portion between magnet.This can for example reduce iron core between three layers of magnet steel
Saturation effect, improve motor torque.The optimal solution of mh2 thickness can be obtained by finite element analysis computation.For example, one
In a embodiment, the thickness mh3, only of unobvious the thickness mh1 for changing the first magnet 512 and third magnet 520 can be passed through
Reduce the thickness mh2 of the second magnet 516 to achieve the effect that increase torque.That is, the thickness mh2 of the second magnet 516 is less than
The thickness mh1 of one magnet 512, and it is less than the thickness mh3 of third magnet 520.
In addition, the first magnet slot 502 can be U-shaped magnet slot, the second magnet slot in some embodiments of the present disclosure
504 may include that there are the generally L-shaped magnet slots in gap 522 for two centres, and third magnet slot 506 may include two
There are the generally L-shaped magnet slots in gap 524 for centre.The shape of above-mentioned magnet slot can be turned using a variety of other can be realized
The structure and shape for the function that son plays in motor, can include but is not limited to the U-shaped of integral form, the L shape of separate form,
Linear type, V-arrangement etc. and any combination of them.
In addition, the L shape magnet slot in the second magnet slot and third magnet slot can have the opening away from rotor center, such as
It is described previously, it will be appreciated by those skilled in the art that L shape magnet slot here also can have the opening in a variety of other directions.
According to Fig. 3-embodiment shown in fig. 6, in conjunction with above-mentioned formula (3) to the explanation of output torque T, by adjusting the second magnetic
The thickness of body can reduce the saturation effect in magnetic field between three layers of magnet steel to increase the thickness of the iron core between the magnet of fixed position
It answers, reduces magnetic resistance, improve torque.As a result, in accordance with an embodiment of the present disclosure, it may be implemented to increase in the case where reducing magnet dosage
The output torque of big motor, to reduce manufacturing cost.
According to one embodiment, in the case where the diameter of rotor is about 140mm, the thickness mh1 of the first magnet 512
Range be about 2.5- about 3.5mm, the range of the thickness mh2 of the second magnet 516 is about 2.2- about 3.2mm, third magnet 520
The range of thickness mh3 is about 2.5- about 3.5mm.In the case where the diameter of rotor is about 170mm, the first magnet 512
The range of thickness mh1 is about 3.0- about 4.3mm, the range of the thickness mh2 of the second magnet 516 is about 2.7- about 3.9mm, third magnetic
The range of the thickness mh3 of body 520 is about 3.0- about 4.3mm.Above-mentioned numberical range is only exemplary, those skilled in the art
Other suitable numerical value can be selected according to concrete application.
According to some embodiments of the present disclosure, Figure 12 show the thickness mh2 of the second magnet variation and reluctance torque it
Between corresponding relationship.In conjunction with shown in Figure 12 and Fig. 5, the diameter of rotor is about 140mm, at this point, the first magnet 512, second
Magnet 516 and third magnet 520 are placed on the pre-position in iron core.Specifically, the first magnet 512 and rotor periphery it
Between distance be about 3.2mm, and the core portion 538 between the first magnet 512 and the second magnet 516 with a thickness of about
4.6mm, core portion 540 between the second magnet 516 and third magnet 520 with a thickness of about 4.9mm.First magnet 512
Thickness mh1 is about 3.0mm, and the thickness mh3 of third magnet 520 is about 3.0mm, and the thickness mh2 of the second magnet 516 is about
3.0mm.Under this arrangement, the thickness mh2 for adjusting the second magnet 516 makes it be reduced to 1.6mm from 3.0mm.As shown in figure 12,
In the range of mh2 changes to 2.4mm from 3.0mm, reluctance torque is gradually increased with the reduction of mh2.And when mh2 is more than 2.4mm
When, reluctance torque is gradually reduced with the reduction of mh2.Therefore, in accordance with an embodiment of the present disclosure, can not reduce in reluctance torque
Under the premise of reduce the thickness mh2 of the second magnet 516 in a certain range (for example, selecting in the range of 3.0mm-2.4mm
Mh2), so as to achieve the effect that increase reluctance torque.Due to reducing the thickness of magnet, magnet use can also be reduced
Amount is to reduce manufacturing cost.
Although illustrating the effect of the present embodiment, those skilled in the art here in connection with specific numberical range
It should be appreciated that above-mentioned numerical value is only exemplary and is not intended to limit this disclosure.In conjunction with the spirit or teaching of the disclosure, originally
Field technical staff can reasonably determine the correspondingly-sized suitable for other occasions.
It is described below for the other structures feature of magnet.
In accordance with an embodiment of the present disclosure, rotor may include iron core and the generally edge arranged from outside to inside in iron core
Iron core tangential the first magnet, the second magnet and third magnet, wherein two outermost side ends of the first magnet and iron core center
Line can form the first angle, two outermost side ends of the second magnet and the line at iron core center can form the second folder
The line of angle and two outermost side ends of third magnet and iron core center can form third angle, first angle
Less than second angle, second angle is less than the third angle.
According to some embodiments of the present disclosure, rotor may include iron core and arrange from outside to inside substantially in iron core
On along the first tangential magnet of iron core, the second magnet to and third magnet pair, wherein two magnets of second magnet pair that
This forms the first magnet angle, and two magnets of the third magnet pair form the second magnet angle each other, and second magnet angle is small
In first magnet angle, first magnet angle is less than 180 °.
Figure 10 show two outermost side ends of magnet that is according to an embodiment of the present disclosure, being arranged in magnet slot with
The schematic diagram at the magnet angle of angle and magnet pair that the line at iron core center is formed.Specifically, in accordance with an embodiment of the present disclosure,
As shown in Figure 10, rotor may include rotor core 1000, the first magnet 1010 being arranged in rotor core 1000, relative to
First magnet 1010 is arranged in the second magnet 1012 of 1000 inside of rotor core and is arranged in relative to the second magnet 1012
The third magnet 1018 of 1000 inside of rotor core.Three magnets can the tangential direction respectively along iron core 1000 be disposed to extend.
First magnet 1010, the second magnet 1012 and third magnet 1018 can have substantially the same pair along iron core radial direction
Claim axis, as shown in the vertical dotted line in Figure 10.Wherein the first magnet 1010 can be arranged in the first magnet slot 1002, the second magnetic
Body 1012 can be arranged in the second magnet slot 1004, and third magnet 1018 can be arranged in third magnet slot 1006.First
The line of the two outermost side ends and iron core center 1008 of magnet 1010, the second magnet 1012 and third magnet 1018 can divide
The first angle α 1, the second angle α 2 and third angle α 3 are not formed, as shown in Figure 10.First angle α 1 less than the second angle α 2,
Second angle α 2 is less than third angle α 3.Configuration in this way, can more field waveform made of optimization stack, make rotor
The harmonic content in magnetic field is reduced closer to sine wave in the magnetic field of generation.
According to some embodiments of the present disclosure, the company for choosing magnet two outermost side ends and iron core center is further illustrated
The method of the angle of line.Figure 13 shows magnetic potential caused by each magnet and is superimposed the schematic diagram to form sinusoidal waveform.It can lead to
The relationship of sinusoidal waveform is crossed to derive the value of suitable α 1, α 2 and α 3.Specifically, the point on sinusoidal waveform has y=cos
The relationship of (x/ τ * π), wherein τ is constant, and y is the vertical range between the point on waveform and waveform horizontal axis, and x is on waveform
Point to waveform symmetry axis horizontal distance.For example, as shown in figure 13, the first magnet 1010 hanging down to rotor center in Figure 10
Straight distance is y1, and the horizontal distance between the end A and the axis of symmetry of the first magnet of the first magnet 1010 is x1, there is x1
=τ/π * arcos (y1), and then the first angle α 1=2* β 1=2*arctg (x1/y1) in Figure 10 is obtained, wherein β 1 is first
Angle between the end of magnet 1010 and the line of rotor center and the first magnet symmetry axis.Similarly, in Figure 10
The second magnet 1012, can have x2=τ/π * arcos (y2), wherein the second magnet 1012 in Figure 10 to rotor center hang down
Straight distance is y2, and the horizontal distance between an end of the second magnet 1012 and the axis of symmetry of the second magnet is x2.Figure 10
In the second angle α 2=2* β 2=2*arctg (x2/y2), wherein β 2 is the end and the rotor center of the second magnet 1012
Angle between line and the second magnet symmetry axis.For the third magnet 1018 in Figure 10, there can be x3=τ/π * arcos
(y3), wherein the vertical range of the third magnet 1018 in Figure 10 to rotor center is y3, an end of third magnet 1018
Horizontal distance between the axis of symmetry of third magnet is x3, the third angle α 3=2* β 3=2*arctg (x3/ in Figure 10
Y3), wherein β 3 be third magnet 1018 the end and rotor center line and third magnet symmetry axis between angle.?
In the case where known each dimensional parameters of above-mentioned x1, y1, x2, y2, x3, y3, available first angle α 1, the second angle α 2 and
The value of three angle αs 3.Similarly, which is readily applicable to be disposed with turning for more than three magnets in one group of magnet
Son.
Furthermore it is also possible to acquire the value of suitable α 1, α 2 and α 3 by parameter optimization.For example, setting β 1 is first
Variable, β 2=β 1+ △ β 1, β 3=β 2+ △ β 2 carry out parametrization solution, to obtain making magnetic field superposition close to sinusoidal waveform
The value of corresponding preferred β 1, β 2, β 3, to obtain the value of the first angle α 1, the second angle α 2 and third angle α 3.It is similar
Ground, the choosing method are readily applicable to be disposed with the rotor of more than three magnets in one group of magnet.
In the manufacture of actual rotor, the first angle α 1 can range from about 10-13 degree, and the range of the second angle α 2 can
To be about 20-25 degree, and third angle can range from about 30-36 degree.Above-mentioned numberical range is only exemplary, this
Field technical staff can select other suitable numerical value according to concrete application.
According to some embodiments of the present disclosure, as shown in Figure 10, the first magnet 1010 can be the magnet as monolith.The
Two magnets 1012 can be the magnet pair including magnet 1014 and magnet 1016.Third magnet 1018 can be including magnet 1020
With the magnet pair of magnet 1022.Wherein, it can be formed for the magnet pair in the first magnet 1012, magnet 1014 and magnet 1016
First magnet angle θ 1.For the magnet pair of third magnet 1018, magnet 1020 and magnet 1022 can form the second magnet angle θ 2,
And θ 1 is less than 180 degree, and θ 2 is less than θ 1.Arrangement in this way can further improve the waveform in magnetic field, improve poly- magnetic effect
Fruit, and then improve the performance of motor.
According to some embodiments of the present disclosure, the setting by magnet angle is further illustrated to improve the effect of field waveform
Fruit.Figure 14 shows the corresponding air gap flux density of angle displacement of different air gap center lines.In Figure 14, abscissa indicates air gap
The angle displacement 0-360 degree of center line.Figure 15 shows the relationship between air gap flux density and air gap flux density harmonic order.This field
Technical staff using air gap flux density percent harmonic distortion Δ ε it should be understood that can usually reflect the superiority and inferiority of field waveform.Gas
Gap flux density percent harmonic distortionWherein BδiRepresent the corresponding air gap flux density of the i-th harmonic order.In each harmonic order
B in corresponding air gap flux densityδ1Maximum, aberration rate are the summation of the air gap flux density of other harmonic orders and the gas of the 1st harmonic order
The ratio of gap flux density.The smaller expression field waveform of aberration rate Δ ε is better.
When the first magnet shown in Fig. 10 angle θ 1=180 degree and when the second magnet angle θ 2=180 is spent, aberration rate Δ ε is
44.5%.When the first magnet angle θ 1=170 degree and when the second magnet angle θ 2=160 is spent, aberration rate Δ ε is 40.2%.Also
It is to say, in the case where the second magnet angle θ 2 is less than the first 1 θ of magnet angle, field waveform is improved, to improve motor
Runnability.
According to some embodiments of the present disclosure, the angular range at the first magnet angle can be about 160 °-about 175 °, and described
Two magnet angles can range from about 150 °-about 165 °.Above-mentioned numberical range is only exemplary, and those skilled in the art can
To select other suitable numerical value according to concrete application.
In addition, according to some embodiments of the present disclosure, as the magnet 1014 and magnetic in the second magnet 1012 of magnet pair
Can have the first gap 1024 between body 1016, the magnet 1020 and magnet 1022 of the third magnet 1018 as magnet pair it
Between can have the second gap 1026, and the length in the first gap 1024 can be less than the length in the second gap 1026.
In order to avoid obscuring the purport of the disclosure, the side each for motor that attached drawing teaches the disclosure respectively is had been combined
The improvement in face, however, it is understood by those of ordinary skill in the art that, improvement documented by the disclosure in terms of these can freely group
It closes.For example, rotor shown in as shown in figure 3, can have simultaneously according to novel every magnetic magnetic bridge feature given by the disclosure
And the feature that the exterior portion of magnet slot is wider than middle section.In another example as shown in Fig. 5,10, it can according to the rotor of the disclosure
To have the feature and the non-uniform feature of multiple magnet thicknesses shown in fig. 5 of α, θ angle shown in Fig. 10 simultaneously.In order to keep away
To exempt to repeat, the disclosure does not have these exhaustive improved all combinations, however, it is understood by those of ordinary skill in the art that, these
Combination is clear and reasonable, and is entirely included within the scope of the present disclosure.
The various embodiments of the disclosure are described above, but above description is only exemplary, and exhaustive
Property, and it is also not necessarily limited to disclosed various embodiments.In the scope and spirit without departing substantially from illustrated various embodiments
In the case of, many modifications and variations are obvious for those skilled in the art.It is used herein
The selection of term, it is intended to the principle, practical application or the technological improvement to Market and Technology of various embodiments are best explained, or
Other those of ordinary skill of the art are enable to understand various embodiments disclosed herein.
Claims (8)
1. a kind of rotor of motor, including：
Iron core；
Arranged from outside to inside in the iron core generally along the first tangential magnet of iron core, the second magnet to and third magnet
It is right；
Wherein two magnets of second magnet pair form the first magnet angle each other, two magnets of the third magnet pair that
This forms the second magnet angle, and second magnet angle is less than first magnet angle, and first magnet angle is less than 180 °.
2. rotor according to claim 1, wherein the line shape of two outermost side ends of the first magnet and iron core center
At the first angle, two outermost side ends of the second magnet pair and the line at iron core center form the second angle and third magnetic
Two outermost side ends of body pair and the line at iron core center form third angle, and first angle is less than second folder
Angle, second angle are less than the third angle.
3. rotor according to claim 2, wherein the range of first angle is 10 ° -13 °, second angle
Range is 20 ° -25 ° and the range of third angle is 30 ° -36 °.
4. rotor according to claim 1 or 2, wherein the range at second magnet angle is 150 ° -165 °, described first
The range at magnet angle is 160 ° -175 °.
5. rotor according to claim 1, wherein there is the first gap between a pair of magnets of second magnet, it is described
There is the second gap, first gap is less than the second gap between a pair of magnets of third magnet.
6. rotor according to claim 5, wherein the length range in the first gap is 0.8-1.4mm, the length in the second gap
Degree range is 1.0-1.6mm.
7. a kind of motor, which is characterized in that including：
Stator；
Rotor according to claim 1 to 6.
8. a kind of vehicle, which is characterized in that including：
Motor, the motor include：Stator and rotor according to claim 1 to 6.
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| CN201610799782.9A CN106329773B (en) | 2016-08-31 | 2016-08-31 | Rotor, motor and the vehicle of motor |
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| CN201610799782.9A CN106329773B (en) | 2016-08-31 | 2016-08-31 | Rotor, motor and the vehicle of motor |
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| CN106329773B true CN106329773B (en) | 2018-11-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3611825A4 (en) * | 2017-04-13 | 2020-12-23 | Kabushiki Kaisha Toshiba | Rotor for dynamo-electric machine |
| CN108566006A (en) * | 2018-03-16 | 2018-09-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
| CN111725917B (en) * | 2018-03-16 | 2021-07-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure and permanent magnet auxiliary synchronous reluctance motor |
| CN108336842B (en) | 2018-03-16 | 2020-10-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
| CN108566005B (en) * | 2018-03-16 | 2020-10-30 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
| CN108321954B (en) * | 2018-03-16 | 2020-10-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
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| CN103580332A (en) * | 2012-08-09 | 2014-02-12 | 通用汽车环球科技运作有限责任公司 | Interior permanent magnet machine having off axis centered arc geometry |
| CN104620473A (en) * | 2012-09-13 | 2015-05-13 | 利莱森玛电机公司 | Rotor of a rotating electric machine, comprising a rotor body in which recesses are provided |
| CN206211696U (en) * | 2016-08-31 | 2017-05-31 | 乐视汽车（北京）有限公司 | The rotor of motor, motor and vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006314152A (en) * | 2005-05-06 | 2006-11-16 | Nissan Motor Co Ltd | Permanent-magnet motor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580332A (en) * | 2012-08-09 | 2014-02-12 | 通用汽车环球科技运作有限责任公司 | Interior permanent magnet machine having off axis centered arc geometry |
| CN104620473A (en) * | 2012-09-13 | 2015-05-13 | 利莱森玛电机公司 | Rotor of a rotating electric machine, comprising a rotor body in which recesses are provided |
| CN206211696U (en) * | 2016-08-31 | 2017-05-31 | 乐视汽车（北京）有限公司 | The rotor of motor, motor and vehicle |
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