CN106300734A - The rotor of motor, motor and vehicle - Google Patents

The rotor of motor, motor and vehicle Download PDF

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Publication number
CN106300734A
CN106300734A CN201610797821.1A CN201610797821A CN106300734A CN 106300734 A CN106300734 A CN 106300734A CN 201610797821 A CN201610797821 A CN 201610797821A CN 106300734 A CN106300734 A CN 106300734A
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CN
China
Prior art keywords
magnetic
magnet slot
magnet
rotor
width
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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CN201610797821.1A
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Chinese (zh)
Inventor
陈毅
傅振兴
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Fafa Automobile China Co ltd
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Faraday Beijing Network Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Faraday Beijing Network Technology Co Ltd filed Critical Faraday Beijing Network Technology Co Ltd
Priority to CN201610797821.1A priority Critical patent/CN106300734A/en
Publication of CN106300734A publication Critical patent/CN106300734A/en
Pending legal-status Critical Current

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Classifications

    • 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]

Abstract

It relates to the rotor of motor, motor and vehicle.Motor includes stator and rotor.According to an aspect of this disclosure, rotor can include iron core；At least two magnet slot arranged on described iron core, is arranged in the second magnet slot inside described iron core including the first magnet slot with relative to described first magnet slot；Wherein, first is had every magnetic magnetic bridge between one end and the outer rim of described rotor of described first magnet slot, closing on of described second magnet slot described first has second every magnetic magnetic bridge between the end and the outer rim of described rotor of magnetic magnetic bridge, described first every the width of magnetic magnetic bridge less than described second every the width of magnetic magnetic bridge.

Description

The rotor of motor, motor and vehicle
Technical field
It relates to vehicle, the particularly motor in vehicle, relate more particularly to motor in vehicle Rotor.
Background technology
In the world today, vehicle has become as people's work and the requisite vehicles of living.Owing to oil provides Consideration in terms of the day by day nervous and environmental conservation in source, pure electric vehicle and motor vehicle driven by mixed power day by day cause people's Note.There is the demand to each side that the motor used in pure electric vehicle and motor vehicle driven by mixed power improves.
Summary of the invention
The disclosure aims to solve the problem that at least one problem present in prior art.
According to an aspect of this disclosure, it is provided that the rotor of a kind of motor, described rotor includes iron core；Magnet slot, institute State magnet slot and include mid portion and Outboard Sections, generally being arranged on tangentially on described iron core along described iron core；Wherein, institute The thickness of the Outboard Sections stating magnet slot is more than the thickness of described mid portion.
According to another aspect of the present disclosure, it is provided that a kind of motor, described motor includes stator and above-mentioned rotor.
Another aspect according to the disclosure, it is provided that a kind of vehicle, described vehicle includes that motor, described motor include stator And above-mentioned rotor.
Another aspect according to the disclosure, it is provided that the rotor of a kind of motor, described rotor includes: unshakable in one's determination；At described ferrum At least two magnet slot arranged in the heart, is arranged in described iron core including the first magnet slot with relative to described first magnet slot Second magnet slot of side；Wherein, have first every magnetic between an end and the outer rim of described rotor of described first magnet slot Magnetic bridge, described second magnet slot close on described first have between the end and the outer rim of described rotor of magnetic magnetic bridge second every Magnetic magnetic bridge, described first every the width of magnetic magnetic bridge less than described second every the width of magnetic magnetic bridge.
Another aspect according to the disclosure, it is provided that the rotor of a kind of motor, described rotor includes: unshakable in one's determination；At described ferrum The multiple magnet slot arranged the most from outside to inside, the two ends of each in the plurality of magnet slot respectively with the limit of described iron core Edge is formed every magnetic magnetic bridge；Wherein magnet slot is further away from the center of described rotor, and the width every magnetic magnetic bridge corresponding to this magnet slot is more Little.
Another aspect according to the disclosure, it is provided that a kind of motor, described motor includes stator and above-mentioned rotor.
Another aspect according to the disclosure, it is provided that a kind of vehicle, described vehicle includes that motor, described motor include stator And above-mentioned rotor.
Another aspect according to the disclosure, it is provided that the rotor of a kind of motor, described rotor includes: unshakable in one's determination；At described ferrum The most generally along at least two magnet slot of tangential direction unshakable in one's determination, including the first magnet slot with relative to described first magnet slot It is arranged in the second magnet slot inside described iron core；Wherein, described first magnet slot includes middle there is the first space two Magnet slot, described second magnet slot includes that centre exists two magnet slot of Second gap, and described first gap is less than described the Two gaps.
Another aspect according to the disclosure, it is provided that the rotor of a kind of motor, described rotor includes: unshakable in one's determination；At described ferrum Arrange the most from outside to inside generally along multiple magnet slot that described iron core is tangential, at least two in the plurality of magnet slot Including the first magnet slot part and the second magnet slot part and gap therebetween；Wherein magnet slot is further away from described rotor Center, the gap that this magnet slot has is the least.
According to another aspect of the present disclosure, it is provided that a kind of motor, described motor includes stator and above-mentioned rotor.
Another aspect according to the disclosure, it is provided that a kind of vehicle, described vehicle includes that motor, described motor include stator And above-mentioned rotor.
Another aspect according to the disclosure, it is provided that the rotor of a kind of motor, described rotor includes: unshakable in one's determination；At described ferrum The most radially arranged at least three magnet along tangential direction unshakable in one's determination, described at least three magnet is disposed in described iron core In pre-position, the first magnet that described magnet includes arranging from outside to inside along radial direction unshakable in one's determination, the second magnet and the Three magnets, the thickness of described second magnet is adjusted so that in the case of reluctance torque does not reduces and increases between magnets Thickness unshakable in one's determination.
According to another aspect of the present disclosure, it is provided that a kind of motor, described motor includes stator and above-mentioned rotor.
Another aspect according to the disclosure, it is provided that a kind of vehicle, described vehicle includes that motor, described motor include stator And above-mentioned rotor.
Another aspect according to the disclosure, it is provided that the rotor of a kind of motor, described rotor includes: unshakable in one's determination；At described ferrum Generally edge tangential the first magnet, the second magnet and the 3rd magnet unshakable in one's determination arranged the most from outside to inside；Wherein the first magnet The line at two outermost ends and center unshakable in one's determination form the first angle, two outermost ends of the second magnet with in iron core The line of the heart forms the second angle, and the line at two outermost ends of the 3rd magnet and center unshakable in one's determination forms the 3rd folder Angle, described first angle is less than described second angle, and described second angle is less than described 3rd angle.
Another aspect according to the disclosure, it is provided that the rotor of a kind of motor, described rotor includes: unshakable in one's determination；At described ferrum Arrange the most from outside to inside generally along unshakable in one's determination the first tangential magnet, the second magnet to and the 3rd magnet pair；Wherein said Two magnets of the second magnet pair form the first magnet angle each other, and two magnets of described 3rd magnet pair form the second magnetic each other Body angle, described second magnet angle is less than described first magnet angle, and described first magnet angle is less than 180 °.
According to another aspect of the present disclosure, it is provided that a kind of motor, described motor includes stator and above-mentioned rotor.
Another aspect according to the disclosure, it is provided that a kind of vehicle, described vehicle includes that motor, described motor include stator And above-mentioned rotor.
Having technical effect that of some embodiments of the disclosure, improves the mechanical strength of rotor.Other of the disclosure are real Execute having technical effect that of example, on the premise of controlling motor manufacturing cost, improve the output torque of motor.Another of the disclosure Having technical effect that of a little embodiment, reduces the harmonic component in magnetic field, optimizes field waveform, thus improves the performance of motor.
Accompanying drawing explanation
Fig. 1 shows the schematic side elevation according to the vehicle that embodiment of the disclosure；
Fig. 2 shows the schematic diagram according to the motor including stator and rotor that embodiment of the disclosure；
Fig. 3 shows that be one group according to being circumferentially arranged in iron core of embodiment of the disclosure with two magnet slot The schematic diagrams organizing magnet slot more；
Fig. 4 shows according to two magnet slot radially arranged in one group of magnet slot that embodiment of the disclosure, Fig. 3 Enlarged drawing；
Fig. 5 shows that be one group according to being circumferentially arranged in iron core of embodiment of the disclosure with three magnet slot The schematic diagrams organizing magnet slot more；
Fig. 6 shows according to three magnet slot radially arranged in one group of magnet slot that embodiment of the disclosure, Fig. 5 Enlarged drawing；
Fig. 7 shows the another of three that basis embodiment of the disclosure, radially arranged in one group of magnet slot magnet slot The enlarged drawing of one example；
Fig. 8 shows showing according to two that embodiment of the disclosure, radially arranged in one group of magnet slot magnet slot Example；
Fig. 9 shows according to two magnet slot radially arranged in one group of magnet slot that embodiment of the disclosure, Fig. 8 Enlarged drawing；
Figure 10 show according to two outermost ends of magnet that embodiment of the disclosure, that be arranged in magnet slot with The angle of the line formation at center unshakable in one's determination and the schematic diagram at the magnet angle of magnet pair；
Figure 11 shows coordinate system transformation and the dq shaft model current phasor figure of permagnetic synchronous motor；
Figure 12 shows the relation between reluctance torque and magnet thickness；
Figure 13 shows that produced by each magnet, magnetic potential superposition forms sine-shaped schematic diagram；
Figure 14 shows the air gap flux density that the angle displacement of different air gap centrages is corresponding；
Figure 15 shows the relation between air gap flux density and air gap flux density harmonic order.
Detailed description of the invention
Describe the various exemplary embodiments of the disclosure below with reference to the accompanying drawings in detail.It is to be understood that, to various realities The description executing example is merely illustrative, not as any restriction of technology of this disclosure.Unless specifically stated otherwise, showing Assembly in example embodiment and positioned opposite, the expression formula of step and numerical value are not intended to the scope of the present disclosure.
Term used herein, it is only for describe specific embodiment, and be not intended to limit the disclosure.On unless The most clearly it is further noted that " one " and " being somebody's turn to do " of singulative used herein is intended to include plural form equally.Also want Be understood by, when " comprising " word is used herein, illustrate exist pointed by feature, entirety, step, operation, unit and/ Or assembly, but it is not excluded that existence or increase one or more further feature, entirety, step, operation, unit and/or assembly And/or combinations thereof.Those skilled in the art it is to be further understood that term " about " used herein is intended to explanation Owing to possible measurement error or foozle make described numerical value contain certain rational change range.
With reference now to Fig. 1, Fig. 1, show the schematic side elevation according to the vehicle that embodiment of the disclosure.Normally, car 10 can include vehicle body 12, multiple wheel 14 being supported on tread by vehicle body 12 and automotive power 16 etc..Should Automotive power 16 can include at least one motor.
It is to be understood that automotive power used herein can include the tool that can be used in promoting vehicle widely There is any automotive power of one or more motor.This automotive power may be used for such as pure electric vehicle and mixed Close power car.In the dynamical system of motor vehicle driven by mixed power, at least one motor can serially or parallelly push away with electromotor The traveling of motor-car.The example of motor vehicle driven by mixed power can include but not limited to plug-in hybrid vehicle, double mode mixing Power car, full motor vehicle driven by mixed power, extended-range motor vehicle driven by mixed power, power-assisted motor vehicle driven by mixed power, light hybrid The mixing of vehicle, serial mixed power vehicle, parallel hybrid vehicles, series-parallel motor vehicle driven by mixed power, fluid power is dynamic Power vehicle, power dividing type motor vehicle driven by mixed power, BAS hybrid vehicle and the motor vehicle driven by mixed power of any other type. Vehicle in the disclosure can be configured to car, motor type car, truck, bus, commercial car, transboundary car, recreation vehicle etc.. Should be understood that the technology of the disclosure may be used for any of the above described automotive power, and be not limited to a certain particular type.
As it is shown in figure 1, in certain embodiments, automotive power 16 generally can include power supply 24, inverter 20, control Unit 18 processed, motor 22 and input equipment 26.As it has been described above, automotive power 16 can use other arrange and/or join Put, but normally include at least one motor.In certain embodiments, motor 22 is operatively connected at least one wheel 14, apply torque to wheel 14 thus drive vehicle 10.
Power supply 24 can provide power to motor 22 directly or indirectly.Power supply 24, such as battery, can include one Or multiple battery unit, and lithium ion, nickel metal hydride, sodium Nickel dichloride., NI-G and any applicable its can be used His battery technology.
Power supply 24 and motor 22 are interconnected by inverter 20 operably.Inverter 20 can receive direct current from power supply 24 Electricity, is converted into alternating current, and alternating current passes to motor 22.
Control unit 18 is operatively connected to inverter 20, thus controls inverter 20.Control unit 18 can be One or more general digital computers or data handling equipment, generally can include but not limited to processor or microprocessor Or CPU, memorizer are (such as, but not limited to read only memory, random access memory, electrically erasable only Read memorizer), input/output device or device, analog-digital converter or change-over circuit, digital analog converter or conversion electricity Road, clock etc..Control unit 18 can be configured to perform programmed instruction, and this programmed instruction can be stored in control unit 18 Memorizer or other other suitable storage devices being associated with control unit 18 in.Control unit 18 can be via inversion Motor is controlled by device 20.
In certain embodiments, vehicle 10 can also include that input equipment 26, input equipment 26 are operatively connected to Control unit 18.The driver of vehicle operates input equipment 26, in order to the output controlling motor 22 via control unit 18 turns Square.In certain embodiments, input equipment 26 selectively includes pedal, and control unit 18 is in response to the location status warp of pedal It is delivered to the size of the electric power of motor 22 by inverter regulation, thus regulates the output torque of motor 22.
Fig. 2 shows the schematic diagram according to the motor 22 including stator and rotor that embodiment of the disclosure.This area skill Although art personnel should be appreciated that disclosure below combines permagnetic synchronous motor and describes multiple embodiments of the disclosure, but this It is not intended to essence and the spirit of each embodiment of the disclosure are restricted to specific motor type.The reality recorded according to the disclosure Executing example, spirit and the essence of wherein each embodiment reasonably can be expanded to other motors by those skilled in the art.
Specifically, as in figure 2 it is shown, motor 22 generally can include rotor portion and stationary part, stationary part can position In the outside of rotor portion, wherein stationary part can include stator core 202 and stator coil 200.Stator coil 200 is permissible Being uniformly distributed in around rotor periphery, stator coil 200 can use the coilings such as flat type copper wire to form.Rotor portion can wrap Include rotor core 204, magnet slot 206 and be positioned at the rotating shaft 208 of rotor center position.Rotor portion also includes being inserted into magnet Magnet in groove 206.Wherein magnet can use multiple permanent magnet material, can include but not limited to aluminum nickel cobalt (AlNiCo), ferrum Oxysome, Rare-Earth Cobalt, neodymium iron boron and binding electromagnetic material etc..In the design can be according to the size of air-gap field, regulation Wanting of the various factors such as motor performance index, the stability of magnetic property, mechanical performance, the facility processed and assemble, Financial cost Ask and permanent magnet material is selected.
Architectural feature below for magnet slot is described.
According to some embodiments of the disclosure, rotor can include rotor core and magnet slot, and this magnet slot can include Mid portion and Outboard Sections, generally being arranged on tangentially in rotor core along rotor core, the wherein outside of this magnet slot The thickness of part can be more than the thickness of mid portion.Specifically, according to some embodiments of the disclosure, as in figure 2 it is shown, rotor Unshakable in one's determination 204 can be included and along many groups magnet slot that rotor circumference is uniform or nonuniform mutation operator is in unshakable in one's determination 204.An enforcement In example, magnet slot is generally along the arranged tangential of iron core 204.Often group magnet slot can include that one or more magnet slot is (in Fig. 2 Illustrate only one), magnet slot 206 can include mid portion 212 (shown in phantom) and be positioned at outside mid portion 212 Outboard Sections 210.Although accompanying drawing 2 showing, Outboard Sections 210 is positioned at mid portion 212 both sides, but, the disclosure is not Being only limitted to this, Outboard Sections 210 can be located only within the side of mid portion 212.Magnet can be arranged in the pars intermedia of rotor Divide in 212 (the multiple connected modes such as bonding agent, draw-in groove, securing member can be passed through inserted by magnet or be embedded into magnet slot).Magnetic Body groove 206 can use multiple other structure being capable of the function that rotor plays in motor and shape, can include but It is not limited to the U-shaped of integral form, the L-shaped of separate form, in-line, V-arrangement etc..
An embodiment according to the disclosure, the thickness of Outboard Sections 210 can be more than the thickness of this mid portion 212. As it was noted above, the mid portion 212 of magnet slot will accommodate magnet, thus, Outboard Sections 210 will accommodate air.Transport at motor When turning, above-mentioned layout can play the effect increasing reluctance torque, and then increases output torque.On the other hand, due to lateral part Accommodate in points 210 is air, and the thickness therefore increasing Outboard Sections 210 can't increase the consumption of magnet extraly.That is, Above-described embodiment according to the disclosure can't increase the manufacturing cost of motor while increasing motor performance, and more empty Air drain can reduce the quality of iron core, improves power/torque mass density further.
As it was noted above, according to some embodiments of the disclosure, often group magnet slot can include one or more magnet slot. Fig. 3 show according to being circumferentially arranged in iron core of embodiment of the disclosure with many groups magnet that two magnet slot are one group The schematic diagram of groove.Specifically, as it is shown on figure 3, how group magnet slot is the most circumferentially arranged in rotor core 300.Often organize magnetic Body groove can include the first magnet slot 302 and the second magnet slot 304.In one embodiment, the second magnet slot 304 is the most permissible The inner side of rotor core 300 it 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, and this axis of symmetry 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 can include the first corresponding Outboard Sections 306 and first mid portion 308, and the second magnet slot 304 can include in the middle of the second corresponding Outboard Sections 310 and second Part 312.Although it will be appreciated by those skilled in the art that and Fig. 3 showing the first Outboard Sections 306 and the second Outboard Sections 310 lay respectively at the first mid portion 308 and both sides of the second mid portion 312, but during Outboard Sections can also be only located at Between part side (not shown).As long as it was noted above, the thickness of Outboard Sections is more than the thickness of mid portion, it is possible to rise To the effect increasing reluctance torque in the case of not increasing magnet steel consumption and cost.As it can be seen, two magnet slot and rotor Can be respectively provided with between outer rim every magnetic magnetic bridge 320 and 322.It addition, the dash area in figure represents is arranged in the first pars intermedia Points 308 and second magnets in mid portion 312.
Fig. 4 shows according to two magnet slot radially arranged in one group of magnet slot that embodiment of the disclosure, Fig. 3 Enlarged drawing.As it can be seen, the thickness of the first Outboard Sections 306 can represent with width1, the thickness of the first mid portion 308 Can represent with mh1, similarly, the thickness of the second Outboard Sections 310 can represent with width2, the second mid portion 312 Thickness can represent with mh2.According to some embodiments of the disclosure, the thickness of the Outboard Sections 306 of the first magnet slot 302 correspondence Can be more than the thickness of mid portion 308, i.e. width1 can be more than mh1；And/or second lateral part of magnet slot 304 correspondence The thickness dividing 310 can be more than the thickness of mid portion 312, i.e. width2 can be more than mh2.As it was noted above, by so Configuration, it is possible to play increase reluctance torque so that increase motor output torque effect, improve power/torque matter further Metric density.
According to some embodiments, in the case of the diameter of the rotor of motor is 140mm, the scope of width1 and width2 Can be about 2.8-about 3.8mm.Mh1 and mh2 can range from about 2.4-about 3.4mm.Diameter at the rotor of motor is In the case of 170mm, width1 and width2 can range from about 3.4-about 4.7mm.Mh1 and mh2 can range from about 2.9-about 4.2mm.Above-mentioned numerical range is merely exemplary, those skilled in the art can select other according to concrete application Suitably numerical value.
It addition, for the first magnet slot and the second magnet slot, the multiple rotor that is capable of can be used to play in motor The structure of function and shape, can include but not limited to the U-shaped of integral form, the L-shaped of separate form, in-line, V-arrangement etc. with And their any combination.For clarity rather than the purpose that limits, use the magnet slot of L-shaped or U-shaped as showing here Example.Specifically, as it is shown on figure 3, according to some embodiments of the disclosure, the first magnet slot 302 is U-shaped magnet slot, the second magnet Groove 304 can include pair of L-shaped magnet slot, and magnet slot can be arranged symmetrically by this, and can form space in the middle of both 314.This can include corresponding Outboard Sections and the adjacency section adjacent with this Outboard Sections to each magnet slot in magnet slot Point, such as, the Outboard Sections 310 in figure and adjacent part 316, described Outboard Sections and adjacent part generally form L-shaped, The adjacent part 316 of each correspondence in pair of magnets groove described here constitutes in the second magnet slot described above Between part 312, wherein the thickness of Outboard Sections 310 is more than the thickness of adjacent part 316.It addition, the magnet slot of L-shaped can have Deviate from the opening of rotor center.In other embodiments, it will be understood by those skilled in the art that the magnet slot of this L-shaped can also There is the opening towards other directions.
Other embodiment according to the disclosure, the first magnet slot and the second magnet slot may each comprise middle existence sky The pair of L-shaped magnet slot of gap.U-shaped magnet slot is may each be according to other embodiments, the first magnet slot and the second magnet slot.Root According to other embodiments, the first magnet slot can include that above-mentioned centre exists the pair of L-shaped magnet slot in space, and the second magnetic Body groove can be U-shaped magnet slot.
Further, Fig. 5 show according to being circumferentially arranged in iron core of embodiment of the disclosure with three magnetic Body groove is the schematic diagram of many groups magnet slot of a group.Rotor shown in Fig. 5 can include the first magnet slot 502, relative to first Magnet slot 502 be arranged in the second magnet slot 504 inside rotor core 500 and relative to the second magnet slot 504 be arranged in turn The 3rd magnet slot 506 inside son unshakable in one's determination 500.This first magnet slot 502, second magnet slot 504 and the 3rd magnet slot 506 are permissible There is the substantially the same axis of symmetry radially, as shown in dotted line vertical in Fig. 5.Wherein, the first magnet slot 502 Can include Outboard Sections 510 and the mid portion 512 of correspondence, the second magnet slot 504 can include the Outboard Sections 514 of correspondence With mid portion 516, the 3rd magnet slot 506 can include Outboard Sections 518 and the mid portion 520 of correspondence.This rotor also may be used To include the magnet being arranged in the mid portion of first magnet slot the 502, second magnet slot 504 and the 3rd magnet slot 506, such as figure (the multiple connected modes such as bonding agent, draw-in groove, securing member can be passed through inserted by magnet or be embedded into magnetic shown in the dash area of 5 In body groove).
Fig. 6 shows according to three magnet slot radially arranged in one group of magnet slot that embodiment of the disclosure, Fig. 5 Enlarged drawing.As shown in Figure 6, the thickness of the Outboard Sections 510 of the first magnet slot 502 can represent with width1, the first magnet The thickness of the mid portion 512 of groove 502 can represent with mh1, similarly, and the thickness of the Outboard Sections 514 of the second magnet slot 504 Can represent with width2, the thickness of the mid portion 516 of the second magnet slot 504 can represent with mh2；3rd magnet slot 506 The thickness of Outboard Sections 518 can represent with width3, the thickness of the mid portion 520 of the 3rd magnet slot 506 can use mh3 Represent.According to some embodiments of the disclosure, the thickness of the Outboard Sections 510 of the first magnet slot 502 correspondence can be more than centre The thickness of part 512, i.e. width1 can be more than mh1；And/or second the thickness of Outboard Sections 514 of magnet slot 504 correspondence can With the thickness more than mid portion 516, i.e. width2 more than mh2；And/or the 3rd Outboard Sections 518 of magnet slot 506 correspondence Thickness can be more than the thickness of mid portion 520, i.e. width3 can be more than mh3.
According to some embodiments of the disclosure, as it is shown in figure 5, the first magnet slot can be U-shaped magnet slot, the second magnet slot Can include that centre exists the magnet slot of two generally L-shaped in gap with the 3rd magnet slot.Here to the enforcement shown in Fig. 5 The description that example is carried out is solely for the purpose of illustration, as it was noted above, in certain embodiments, and the first magnet slot, the second magnetic One of body groove and the 3rd magnet slot L-shaped that can be selected as U-shaped and separate form.Those skilled in the art it will also be understood that For the first magnet slot, the second magnet slot and the 3rd magnet slot, can use and multiple be capable of what rotor played in motor Other structure of function and shape, can include but not limited to in-line, V-arrangement etc. and their any combination.
The structure of rotor according to the disclosure is further illustrated below.Generally can be with cloth on the stator of permagnetic synchronous motor It is equipped with three-phase symmetric winding, rotor can include magnet, to provide excitation, can pass through air-gap field between stator and rotor There is electromagnetic coupled relation, thus carry out the conversion between mechanical energy and electric energy.Usually, for easy analysis, can be by forever Magnetic-synchro motor model conversion under three-phase static coordinate system is the model under rotor synchronous rotary dq coordinate system.Figure 11 illustrates Between permagnetic synchronous motor three-phase static coordinate system, stator biphase α β rest frame and rotor synchronous rotary dq coordinate system Relation.As shown in figure 11, I is stator current resultant vector, idAnd iqRepresent d axle equivalent current and q axle equivalent current respectively.Its In in the biphase rest frame of stator, α axle overlaps with the A phase axis of three-phase static coordinate system, β axle 90 degree of electricity of advanced α axis Angle.In rotor synchronous rotary dq coordinate system, the N pole central axis in the magnetic field produced by rotor, will be super as d-axis (d axle) The position of front 90 degree of electrical angles of d-axis is as quadrature axis (q axle).Normally, can first the equation under three-phase static coordinate system be passed through Clarke conversion obtains the equation under the biphase rest frame of α β, then obtains the equation under dq coordinate system by Park conversion. It can be seen from figure 11 that Ea is the counter electromotive force of motor, the direction of Ea is identical with q direction of principal axis, and ψ is the magnetic linkage of magnet, the direction of ψ Identical with d direction of principal axis.
By converting, the equivalent voltage U of d axle and q axle can be obtaineddAnd Uq, as shown in Equation 1.
Ud=Rid+Ldi’d-ωLqiq
Uq=Riq+Lqi’q+ω(Ldid+ψ) (1)
Wherein, ω is the electric rotating angular velocity of rotor, LdAnd LqBeing d axle and q axle inductance respectively, R is the electricity mutually of every phase winding Resistance, i 'dAnd i 'qIt is i respectivelydAnd iqTime-derivative.
And then use the 3/2 conversion principle keeping amplitude constant, the electromagnetic power P of permagnetic synchronous motor can be obtainedc, as Shown in formula 2.
Pc=3/2 (Udid+Uqiq)=3/2 [ω ψ iq+ω(Ld-Lq)idiq] (2)
The electromagnetic torque of permagnetic synchronous motor is the result that the electromagnetic power of motor is divided by with mechanical angle speed, the most permissible Obtaining the three-phase p internal permanent magnet synchronous motor to pole output torque T under dq coordinate system, output torque T can be by two Being grouped into, 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 the embodiment shown in Fig. 2-Fig. 5, by making the thickness of the Outboard Sections of magnet slot more than mid portion Thickness, d axle magnetic resistance is increased.Owing to d axle magnetic resistance and d axle inductance L can be thought approxdIt is inversely proportional to, therefore d axle inductance LdSubtract Little.So that L in the case of the change of q axle inductance is littledAnd LqDifference increase, and then reluctance torque T is increased.Enter One step ground, is the thickness of air-gap in magnet slot due to increase, therefore increases in the case of not increasing magnet consumption The output torque of motor.
It is described below for the feature every magnetic magnetic bridge formed between rotor periphery and magnet slot.Design at motor In, cause magnet material utilization rate too low in order to the magnetic leakage factor not making the magnet in motor is excessive, generally use certain Every magnetic measure, such as, arrange every magnetic magnetic bridge between magnet slot and rotor periphery, as shown in the reference 214 in Fig. 2.Logical Cross and make to reach the saturated effect playing restriction leakage field every the magnetic flux of magnetic magnetic bridge part.The least every the width of magnetic magnetic bridge, this part Magnetic resistance will be the biggest, more can limit leakage magnetic flux.
According to some embodiments of the disclosure, rotor is included in rotor core at least two magnet slot arranged, including First magnet slot and be arranged in the second magnet slot inside iron core, wherein an end of the first magnet slot relative to the first magnet slot Hold and have first every magnetic magnetic bridge between the outer rim of rotor, the second magnet slot close on first every the end of magnetic magnetic bridge and rotor Have second every magnetic magnetic bridge between outer rim, first every the width of magnetic magnetic bridge less than second every the width of magnetic magnetic bridge.
Specifically, according to some embodiments of the disclosure, can be the most uniform or non-as it is shown on figure 3, organize magnet slot more It is evenly arranged in rotor core 300, for often organizing magnet slot, the first magnet slot 302 and the second magnet slot 304 can be included, Second magnet slot 304 can be arranged in the inner side 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 axis of symmetry radially, vertical such as Fig. 3 Dotted line shown in.It addition, rotor can also include the magnet being arranged in magnet slot, as shown in the dash area in figure.Such as figure Shown in, first can be formed every magnetic magnetic bridge between the end in axis of symmetry side and the outer rim of rotor of the first magnet slot 302 320, 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.According to embodiment of the disclosure, first every the width of magnetic magnetic bridge 320 less than second every the width of magnetic magnetic bridge 322.Logical Cross such layout, can more effectively utilize every the effect of meeting with stresses of magnetic magnetic bridge, thus improve mechanical stability and increase Big mechanical strength, is used for the contradiction balancing leakage field with rotor mechanical strength.
As shown in Fig. 4 of enlarged drawing, first represents every the width L31 of magnetic magnetic bridge 320, and second every magnetic magnetic bridge 322 Width L32 represent, 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 it is shown on figure 3, according to some embodiments of the disclosure, being positioned at of the first magnet slot 302 is right Claim can to have between end and the outer rim of rotor of axle opposite side the 4th 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 and the outer rim of rotor of magnetic magnetic bridge 324.Enforcement according to the disclosure Example, the 4th every the width of magnetic magnetic bridge 324 less than the 5th every the width of magnetic magnetic bridge 326.
As shown in Fig. 4 of enlarged drawing, the 4th can represent with L33 every the width of magnetic magnetic bridge 324, and the 5th every magnetic magnetic bridge The width of 326 can represent with L34, and the 4th every the width of magnetic magnetic bridge 324 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 disclosure, as it is shown in figure 5, rotor can include the first magnet slot 502, it is arranged in the second magnet slot 504 inside rotor core 500 and relative to the second magnet relative to the first magnet slot 502 Groove 504 is arranged in the 3rd magnet slot 506 inside rotor core 500.In one embodiment, first magnet slot the 502, second magnetic Body groove 504 and the 3rd magnet slot 506 can have substantially the same axis of symmetry radially, such as the vertical void in Fig. 5 Shown in line.Wherein, first can be formed between the end in this axis of symmetry side and the outer rim of rotor of the first magnet slot 502 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 the 3rd magnet slot 506 can have between the end and rotor periphery of magnetic magnetic bridge 528 Have the 3rd every magnetic magnetic bridge 530.First every the width of magnetic magnetic bridge 526 less than second every the width of magnetic magnetic bridge 528, and second every magnetic The width of magnetic bridge 528 less than the 3rd every the width of magnetic magnetic bridge 530.
As shown in Fig. 6 of enlarged drawing, first can represent with L51 every the width of magnetic magnetic bridge 526, and second every magnetic magnetic bridge The width of 528 can represent with L52, and the 3rd can represent with L53 every the width of magnetic magnetic bridge 530.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.It addition, second every the width of magnetic magnetic bridge 528 less than the Three every the width of magnetic magnetic bridge 530, i.e. L52 can be less than L53.
It addition, according to some embodiments of the disclosure, as it is shown on figure 3, the first magnet slot can be U-shaped magnet slot, second Magnet slot can include that centre exists the magnet slot of two generally L-shaped in gap, here carries out the embodiment shown in Fig. 3 Description be solely for the purpose of illustration.For the first magnet slot, the second magnet slot, multiple other can be used to be capable of The structure of the function that rotor plays in motor and shape, can include but not limited to the L of the U-shaped of integral form, separate form Shape, in-line, V-arrangement etc. and their any combination.
Alternatively, or in addition, forward Fig. 5 and Fig. 6 to, the end being positioned at axis of symmetry opposite side of the first magnet slot 502 with turn Can be formed the 4th every magnetic magnetic bridge 532 between the outer rim of son, the neighbouring end every magnetic magnetic bridge 532 of the second magnet slot 504 with turn Can be formed between the outer rim of son the 5th every magnetic magnetic bridge 534, the 5th can be the neighbouring 4th every magnetic magnetic bridge 532 cloth every magnetic magnetic bridge 534 Put, 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.It addition, the 3rd magnet slot 506 Neighbouring can be formed the 6th every magnetic magnetic bridge 536 between the end and the outer rim of rotor of magnetic magnetic bridge 534, the 6th every magnetic magnetic bridge 536 can the neighbouring 5th 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 The width of 536.
As shown in Fig. 6 of enlarged drawing, the 4th can represent with L54 every the width of magnetic magnetic bridge 532, and the 5th every magnetic magnetic bridge The width of 534 can represent with L55, and the 6th can represent with L56 every the width of magnetic magnetic bridge 536.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.It addition, the 5th every the width of magnetic magnetic bridge 534 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 disclosure, as it is shown in figure 5, in actual rotor manufactures, first every magnetic magnetic bridge 526 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 3rd can be about 1.2-about 1.8mm every the width range of magnetic magnetic bridge 530.Similarly, the 4th every the width range of magnetic magnetic bridge 532 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 numerical range is merely exemplary, people in the art Member can select other suitable numerical value according to concrete application.
According to some embodiments of the disclosure, as it is shown in figure 5, the first magnet slot can be U-shaped magnet slot, the second magnet slot Can include that centre exists the magnet slot of two generally L-shaped in gap, here to the enforcement shown in Fig. 5 with the 3rd magnet slot The description that example is carried out is solely for the purpose of illustration.For the first magnet slot, the second magnet slot and the 3rd magnet slot, can adopt By multiple other structure being capable of the function that rotor plays in motor and shape, integral form can be included but not limited to U-shaped, the L-shaped of separate form, in-line, V-arrangement etc. and their any combination.
It addition, the magnet slot of U-shaped can have the opening deviating from rotor center, it will be appreciated by those skilled in the art that herein Opening direction is only schematically, and the magnet slot of this U-shaped can also have the opening towards other directions.The magnet slot of L-shaped can To have the opening deviating from rotor center, it will be appreciated by those skilled in the art that opening direction herein is only schematically, this L-shaped Magnet slot can also have the opening towards other directions.
Fig. 7 shows the another of three that basis embodiment of the disclosure, radially arranged in one group of magnet slot magnet slot The enlarged drawing of one example.According to some embodiments of the disclosure, as it is shown in fig. 7, rotor can include radially by outward to The first magnet slot, the second magnet slot and the 3rd magnet slot being inside arranged in order, the first magnet slot and the second magnet slot can be U-shapeds Magnet slot, the 3rd magnet slot can include that two centres exist the magnet slot of the generally L-shaped in gap.Wherein the first magnet slot with Can form between rotor periphery that width is L1 first can form width between magnetic magnetic bridge, the second magnet slot and rotor periphery Second that degree is L2 can form between magnetic magnetic bridge, the 3rd magnet slot and rotor periphery that width is L3 the 3rd every magnetic magnetic bridge, And first can be less than the 3rd every the width L3 of magnetic magnetic bridge every the width L1 of magnetic magnetic bridge, and the 3rd every the width L3 of magnetic magnetic bridge Can be less than second every the width L2 of magnetic magnetic bridge.
According to some embodiments of the disclosure, rotor can include rotor core and arrange from outside to inside in rotor core Multiple magnet slot of row, the two ends of each magnet slot can be formed with the edge of rotor core respectively two every magnetic magnetic bridge, wherein Magnet slot is further away from the center of rotor, and the width every magnetic magnetic bridge corresponding to this magnet slot can be the least.Specifically, with Fig. 3 and Fig. 4 As a example by illustrate, the width L31 every magnetic magnetic bridge 320 can be less than every the width L32 of magnetic magnetic bridge 322, every the width of magnetic magnetic bridge 324 Degree L33 can be less than the width L34 every magnetic magnetic bridge 326.It addition, as a example by Fig. 5 and Fig. 6, the width L51 every magnetic magnetic bridge 526 can With less than the width L52 every magnetic magnetic bridge 528, the width L52 every magnetic magnetic bridge 528 can be less than the width L53 every magnetic magnetic bridge 530. Can be able to be less than every the width L55 of magnetic magnetic bridge 534 less than the width L55 every magnetic magnetic bridge 534 every the width L54 of magnetic magnetic bridge 532 Width L56 every magnetic magnetic bridge 536.
It is described below for the gap between pair of magnets groove.
According to some embodiments of the disclosure, rotor can include rotor core and generally along ferrum in rotor core At least two magnet slot of heart tangential direction, is arranged in inside rotor core including the first magnet slot with relative to the first magnet slot The second magnet slot, wherein the first magnet slot can include middle two magnet slot that there is the first space, and the second magnet slot can To include that centre exists two magnet slot of Second gap, the first gap can be less than the second gap.Fig. 8 shows according to these public affairs The embodiment opened, centre there is the example of two magnet slot in gap.
Specifically, as shown in Figure 8, rotor include the first magnet slot 802 unshakable in one's determination 800, that arrange in iron core and relative to First magnet slot 802 is arranged in the second magnet slot 804 inside unshakable in one's determination 800.In one embodiment, the first magnet slot 802 He Second magnet slot 804 can have substantially the same axis of symmetry radially.In one embodiment, the first magnet slot 802 can include magnet slot 806 and the magnet slot 808 forming the first magnet slot pair.Magnet slot 806 can include Outboard Sections 840 and the adjacent part 810 adjacent with Outboard Sections 840, this Outboard Sections 840 and adjacent part 810 can generally form L Shape.Outboard Sections 842 that magnet slot 808 can also include generally forming L-shaped and the adjacent part adjacent with Outboard Sections 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 the magnet slot 818 that form the second magnet slot pair.Magnet slot 816 can include generally forming L-shaped Outboard Sections 844 and the adjacent part 820 adjacent with Outboard Sections.Magnet slot 818 can also include generally forming outside L-shaped Side part 846 and the adjacent part 822 adjacent with Outboard Sections.Can be formed between adjacent part 820 and adjacent part 822 Second gap 824.According to embodiment of the disclosure, the length in the first gap 814 can be less than the length in this second gap 824. By this layout, can more effectively utilize the effect of meeting with stresses of above-mentioned gap, thus improve mechanical stability also And increase the mechanical strength of rotor, and at utmost reduce leakage field, improve motor performance.
Further, Fig. 9 shows according to radially arranged in one group of magnet slot that embodiment of the disclosure, Fig. 8 The enlarged drawing of two magnet slot.Wherein length d1 in the first gap 814 represents, length d2 in the second gap 824 represents, and And first length d1 in gap 814 less than length d2 in the second gap 824.In the actual manufacture of rotor, this first gap 814 Length range can be about 0.8-about 1.4mm, the length range in this second gap 824 can be about 1.0-about 1.6mm.Above-mentioned Numerical range is merely exemplary, those skilled in the art can select other suitable numerical value according to concrete application.
It addition, the magnet slot of above-mentioned L-shaped can have the opening deviating from rotor center, but those skilled in the art should Working as understanding, the magnet slot of above-mentioned L-shaped can also have the opening towards other directions.
Additionally, according to some embodiments of the disclosure, this rotor can also include the adjacency section being arranged in the first magnet slot Divide the magnet in the adjacent part 820,822 of the 810,812 and second magnet slot (bonding agent, draw-in groove, securing member etc. can be passed through Magnet is inserted or is embedded in magnet slot by multiple connected mode), as shown in the dash area of Fig. 8.
According to some embodiments of the disclosure, as shown in Figure 8, between the first magnet slot 802 and the outer rim of rotor core 800 Can also be formed and can also be formed every magnetic magnetic bridge between magnetic magnetic bridge 826, the second magnet slot 804 and the outer rim of rotor core 800 828.Opposite side at axis of symmetry can be similarly formed every magnetic magnetic bridge, does not repeats them here.
Although describing the gap between magnet slot in conjunction with Fig. 8, but, it will be appreciated by persons skilled in the art that this Disclosed embodiment disclose arrange from outside to inside on iron core generally along the tangential multiple magnet slot of described iron core, magnetic Body groove further away from the center of rotor, then the embodiment that this magnet slot has gap is the least.Such as, in certain embodiments, many A part in individual magnet slot can not have gap.Such as it is shown in figure 5, be located furthest from the magnet slot 502 of rotor center The approximation being formed as overall is U-shaped, does not the most have gap.And magnet slot 504 and 506 has gap 522 and 524.According to The present embodiment, above-mentioned gap is it suffices that the length in gap 522 is less than the length in gap 524.
Although it will be understood by those skilled in the art that and not showing that, the embodiment shown in Fig. 5 can also include such as magnet Groove 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 the magnet slot center further away from rotor, and the gap that this magnet slot has is the least.That is, magnet slot 502 Gap less than the gap of magnet slot 506.By said 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 selection of various reasonable.Such as, in Fig. 5 and Fig. 8 institute In the embodiment shown, although there is the Outboard Sections of the magnet slot 504,506 in gap and adjacent part generally constitutes L-type, so And they can be provided with other rational shape, such as yi word pattern or V-type etc..The most such as, not possessing shown in accompanying drawing 5 The magnet slot 502 in gap is the most U-shaped, but, it can also be in-line, V-arrangement and other suitable shapes multiple.This Outward, in the embodiment shown in fig. 8, Part I 806 and the Part II 808 of the first magnet slot 802 correspondence are the most permissible Being L-shaped, alternatively, or in addition, the Part I 816 of the second magnet slot 804 correspondence and Part II 818 can be generally L Shape.But, according to the disclosure, they can be provided with other rational shape.
It is described below for the thickness characteristics unshakable in one's determination between magnet.
According to some embodiments of the disclosure, rotor can include iron core and edge radially arranged in described iron core At least three magnet of tangential direction unshakable in one's determination, described at least three magnet is disposed in the pre-position in described iron core, institute State the first magnet, the second magnet and the 3rd magnet that magnet includes arranging from outside to inside, described second magnetic along radial direction unshakable in one's determination The thickness of body is adjusted so that in the case of reluctance torque does not reduces the thickness unshakable in one's determination increased between magnets.
According to some embodiments of the disclosure, as it is shown in figure 5, rotor can include being arranged in from outside to inside in unshakable in one's determination 500 The first magnet the 512, second magnet 516 and the 3rd magnet 520.First magnet the 512, second magnet 516 and the 3rd magnet 520 The pre-position being placed in iron core.First magnet the 512, second magnet 516 and the 3rd magnet 520 can have generally phase Same axis of symmetry radially, as shown in the dotted line of the vertical direction of Fig. 5.First magnet the 512, second magnet 516 and Three magnets 520 can be arranged in the first magnet slot the 502, second magnet slot 504 and mid portion of the 3rd magnet slot 506 In.In certain embodiments, in conjunction with Fig. 5 and Fig. 6, the thickness of the first magnet 512 is the mid portion of the first magnet slot 502 Thickness mh1, the thickness of the second magnet 516 is the thickness mh2 of the mid portion of the second magnet slot 504, the thickness of the 3rd magnet 520 Degree is the thickness mh3 of the mid portion of the 3rd magnet slot 506.In this configuration, can be by reducing the second magnet 516 Thickness mh2, increases the thickness of the corresponding core portion being between magnet.This can such as reduce between three layers of magnet steel unshakable in one's determination Saturation effect, improve motor torque.Finite element analysis computation can be passed through, draw the optimal solution of mh2 thickness.Such as, one In individual embodiment, can by the thickness mh1 and the thickness mh3 of the 3rd magnet 520 of inconspicuous change the first magnet 512, only The thickness mh2 reducing the second magnet 516 reaches to increase the effect of torque.That is, the thickness mh2 of the second magnet 516 is less than the The thickness mh1 of one magnet 512, and less than the thickness mh3 of the 3rd magnet 520.
It addition, in some embodiments of the disclosure, the first magnet slot 502 can be U-shaped magnet slot, the second magnet slot 504 can include that two centres exist the magnet slot of the generally L-shaped in gap 522, and the 3rd magnet slot 506 can include two There is the magnet slot of the generally L-shaped in gap 524 in centre.The shape of above-mentioned magnet slot can use multiple other to be capable of turning The structure of function that son plays in motor and shape, can include but not limited to the U-shaped of integral form, the L-shaped of separate form, In-line, V-arrangement etc. and their any combination.
It addition, the L-shaped magnet slot in the second magnet slot and the 3rd magnet slot can have the opening deviating from rotor center, as Described previously, it will be appreciated by those skilled in the art that L-shaped magnet slot here can also have the opening in other direction multiple.
According to the embodiment shown in Fig. 3-Fig. 6, in conjunction with the above-mentioned formula (3) explanation to output torque T, by regulating the second magnetic The thickness of body can reduce the saturated effect in magnetic field between three layers of magnet steel to increase the thickness unshakable in one's determination between the magnet of fixed position Should, reduce magnetic resistance, improve torque.Thus, according to embodiment of the disclosure, it is possible to achieve increase in the case of reducing magnet consumption The output torque of big motor, thus reduce manufacturing cost.
According to an embodiment, in the case of the diameter of rotor is about 140mm, the thickness mh1 of the first magnet 512 In the range of about 2.5-about 3.5mm, the second magnet 516 thickness mh2 in the range of about 2.2-about 3.2mm, the 3rd magnet 520 Thickness mh3 is in the range of about 2.5-about 3.5mm.In the case of the diameter of rotor is about 170mm, the first magnet 512 Thickness mh1 in the range of about 3.0-about 4.3mm, the second magnet 516 thickness mh2 in the range of about 2.7-about 3.9mm, the 3rd magnetic The thickness mh3 of body 520 is in the range of about 3.0-about 4.3mm.Above-mentioned numerical range is merely exemplary, those skilled in the art Other suitable numerical value can be selected according to concrete application.
According to some embodiments of the disclosure, Figure 12 show the change of the thickness mh2 of the second magnet and reluctance torque it Between corresponding relation.Shown in Figure 12 and Fig. 5, the diameter of rotor is about 140mm, now, and the first magnet 512, second The pre-position that magnet 516 and the 3rd magnet 520 are placed in iron core.Specifically, the first magnet 512 and rotor periphery it Between the thickness of core portion 538 that is about between 3.2mm, and the first magnet 512 and the second magnet 516 of distance be about 4.6mm, the thickness of the core portion 540 between the second magnet 516 and the 3rd magnet 520 is about 4.9mm.First magnet 512 Thickness mh1 is about 3.0mm, and the thickness mh3 of the 3rd 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 regulating the second magnet 516 makes it be reduced to 1.6mm from 3.0mm.As shown in figure 12, Changing in the range of 2.4mm at mh2 from 3.0mm, reluctance torque is gradually increased with the reduction of mh2.And when mh2 is more than 2.4mm Time, reluctance torque is gradually reduced along with the reduction of mh2.Therefore, according to embodiment of the disclosure, can not reduce in reluctance torque On the premise of reduce within the specific limits the second magnet 516 thickness mh2 (such as, in the scope of 3.0mm-2.4mm select Mh2), such that it is able to reach to increase the effect of reluctance torque.Owing to reducing the thickness of magnet, therefore can also reduce magnet and use Measure thus reduce manufacturing cost.
Although illustrate the effect of the present embodiment here in connection with concrete numerical range, but those skilled in the art Should be appreciated that above-mentioned numerical value is merely exemplary and be not intended to limit the disclosure.In conjunction with the spirit or teaching of the disclosure, this Skilled person can reasonably determine the correspondingly-sized being applicable to other occasions.
Other architectural features below for magnet are described.
According to embodiment of the disclosure, rotor can include iron core and the generally edge arranged from outside to inside in iron core Tangential the first magnet, the second magnet and the 3rd magnet unshakable in one's determination, wherein two outermost ends of the first magnet and center unshakable in one's determination Line can form the first angle, two outermost ends of the second magnet can form the second folder with the line at center unshakable in one's determination Angle, and the line at two outermost ends of the 3rd magnet and center unshakable in one's determination can form the 3rd angle, described first angle Less than described second angle, described second angle is less than described 3rd angle.
According to some embodiments of the disclosure, rotor can include iron core and arrange from outside to inside substantially in iron core Upper along unshakable in one's determination the first tangential magnet, the second magnet to and the 3rd magnet pair, two magnets of wherein said second magnet pair that This forms the first magnet angle, and two magnets of described 3rd magnet pair form the second magnet angle each other, and described second magnet angle is little In described first magnet angle, described first magnet angle is less than 180 °.
Figure 10 show according to two outermost ends of magnet that embodiment of the disclosure, that be arranged in magnet slot with The angle of the line formation at center unshakable in one's determination and the schematic diagram at the magnet angle of magnet pair.Specifically, according to embodiment of the disclosure, As shown in Figure 10, rotor can include rotor core 1000, the first magnet 1010 of being arranged in rotor core 1000, relative to First magnet 1010 is arranged in the second magnet 1012 inside rotor core 1000 and is arranged in relative to the second magnet 1012 The 3rd magnet 1018 inside rotor core 1000.Three magnets can tangential direction along unshakable in one's determination 1000 be disposed to extend respectively. First magnet the 1010, second magnet 1012 and the 3rd magnet 1018 can have the right of substantially the same edge radial direction unshakable in one's determination Claim axle, as shown in the vertical dotted line in Figure 10.During 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 the 3rd magnet 1018 can be arranged in the 3rd magnet slot 1006.First The line at two outermost ends of magnet the 1010, second magnet 1012 and the 3rd magnet 1018 and center 1008 unshakable in one's determination can divide Do not form the first angle α the 1, second angle α 2 and the 3rd angle α 3, as shown in Figure 10.First angle α 1 is less than the second angle α 2, Second angle α 2 is less than the 3rd angle α 3.By such configuration, can the field waveform of more optimization stack, make rotor The harmonic content in magnetic field, closer to sine wave, is reduced in the magnetic field produced.
According to some embodiments of the disclosure, further illustrate and choose two outermost ends of magnet and the company at center unshakable in one's determination The method of the angle of line.Figure 13 shows that produced by each magnet, magnetic potential superposition forms sine-shaped schematic diagram.Can lead to Cross sine-shaped relation to derive suitable α 1, the value of α 2 and α 3.Specifically, the point on sinusoidal wave form has y=cos The relation of (x/ τ * π), wherein τ is constant, and y is the vertical dimension between the point on waveform and waveform horizontal axis, and x is on waveform Point to the horizontal range of waveform symmetry axle.Such as, as shown in figure 13, the first magnet 1010 hanging down to rotor center in Figure 10 Straight distance is y1, and the horizontal range between an end A and the axis of symmetry of the first magnet of the first magnet 1010 is x1, has x1 =τ/π * arcos (y1), and then obtain the first angle α 1=2* β 1=2*arctg (x1/y1) in Figure 10, wherein β 1 is first Angle between this end of magnet 1010 and the line of rotor center and the first magnet axis of symmetry.Similarly, in Figure 10 The second magnet 1012, can have x2=τ/π * arcos (y2), wherein the second magnet 1012 hanging down to rotor center in Figure 10 Straight distance is y2, and the horizontal range between an end and the axis of symmetry of the second magnet of the second magnet 1012 is x2.Figure 10 In the second angle α 2=2* β 2=2*arctg (x2/y2), wherein β 2 is this end and the rotor center of the second magnet 1012 Angle between line and the second magnet axis of symmetry.For the 3rd magnet 1018 in Figure 10, can there is x3=τ/π * arcos (y3), wherein the 3rd magnet 1018 in Figure 10 is y3 to the vertical dimension of rotor center, an end of the 3rd magnet 1018 The 3rd angle α 3=2* β 3=2*arctg (x3/ and the horizontal range between the axis of symmetry of the 3rd magnet is x3, in Figure 10 Y3), wherein β 3 is the angle between this end and the line of rotor center and the 3rd magnet axis of symmetry of the 3rd magnet 1018.? In the case of the known each dimensional parameters of above-mentioned x1, y1, x2, y2, x3, y3, first angle α the 1, second angle α 2 and can be obtained The value of three angle α 3.Similarly, this choosing method be disposed with in being readily adaptable for use in one group of magnet more than three magnet turn Son.
Furthermore it is also possible to try to achieve suitable α 1, the value of α 2 and α 3 by parameter optimization.Such as, setting β 1 is first Variable, β 2=β 1+ △ β 1, β 3=β 2+ △ β 2, carry out parametrization and solve, thus obtaining making magnetic field superposition is close to sinusoidal wave form Corresponding preferred β 1, β 2, the value of β 3, thus obtain the first angle α the 1, second angle α 2 and value of the 3rd angle α 3.Similar Ground, this choosing method is readily adaptable for use in the rotor of the magnet being disposed with more than three in one group of magnet.
In actual rotor manufactures, the first angle α 1 can range from about 10-13 degree, the scope of the second angle α 2 can To be about 20-25 degree, and the 3rd angle can range from about 30-36 degree.Above-mentioned numerical range is merely exemplary, this Skilled person can select other suitable numerical value according to concrete application.
According to some embodiments of the disclosure, as shown in Figure 10, the first magnet 1010 can be the magnet as monoblock.The Two magnets 1012 can be to include magnet 1014 and the magnet pair of magnet 1016.3rd magnet 1018 can be to include magnet 1020 Magnet pair with magnet 1022.Wherein, can be formed for the magnet pair in the first magnet 1012, magnet 1014 and magnet 1016 First magnet angle θ 1.The second magnet angle θ 2 can be formed for the magnet pair of the 3rd magnet 1018, magnet 1020 and magnet 1022, And θ 1 is less than 180 degree, θ 2 is less than θ 1.By such layout, the waveform in magnetic field can be improved further, improve poly-magnetic effect Really, so improve motor performance.
According to some embodiments of the disclosure, further illustrate and improve the effect of field waveform by arranging of magnet angle Really.Figure 14 shows the air gap flux density that the angle displacement of different air gap centrages is corresponding.In fig. 14, abscissa represents air gap The angle displacement 0-360 degree of centrage.Figure 15 shows the relation between air gap flux density and air gap flux density harmonic order.This area Skilled artisan understands that, air gap flux density percent harmonic distortion Δ ε generally can be used to reflect the quality of field waveform.Gas The close percent harmonic distortion of gap magneticWherein BδiRepresent the air gap flux density that the i-th harmonic order is corresponding.At each harmonic order B in corresponding air gap flux densityδ1Maximum, aberration rate is the summation gas with the 1st harmonic order of the air gap flux density of other harmonic order The ratio that gap magnetic is close.This aberration rate Δ ε the least expression field waveform is the best.
When the first magnet angle θ 1=180 degree shown in Figure 10 and the second magnet angle θ 2=180 spend, aberration rate Δ ε is 44.5%.When the first magnet angle θ 1=170 degree and the second magnet angle θ 2=160 spend, aberration rate Δ ε is 40.2%.The most just Being to say, in the case of the second magnet angle θ 2 is less than the first magnet angle θ 1, field waveform is improved, thus improves motor Runnability.
According to some embodiments of the 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 numerical range is merely exemplary, those skilled in the art can To select other suitable numerical value according to concrete application.
It addition, according to some embodiments of the disclosure, as the magnet 1014 in the second magnet 1012 of magnet pair and magnetic Can have the first gap 1024 between body 1016, as the magnet 1020 of the 3rd magnet 1018 of magnet pair and magnet 1022 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 the purport of the fuzzy disclosure, teach respectively already in connection with accompanying drawing the disclosure for each side of motor The improvement in face, however, it is understood by those of ordinary skill in the art that, the improvement in terms of these described in the disclosure can freely group Close.Such as, as it is shown on figure 3, shown rotor can have according to given by the disclosure simultaneously novel every magnetic magnetic bridge feature And the feature that the Outboard Sections of magnet slot is wider than mid portion.The most such as, such as Fig. 5, shown in 10, the rotor according to the disclosure can The feature uneven to have the multiple magnet thicknesses shown in the feature of α, θ angle shown in Figure 10 and Fig. 5 simultaneously.In order to keep away Exempting to repeat, the disclosure does not has these all compound modes improved of limit, however, it is understood by those of ordinary skill in the art that, these Combination is clear and reasonably, and within being entirely included in the scope of the present disclosure.
It is described above the various embodiments of the disclosure, but what described above was merely 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 apparent from for those skilled in the art.Used herein The selection of term, it is intended to explain the principle of various embodiment, actual application or the technological improvement to Market and Technology best, or Other those of ordinary skill making the art is understood that various embodiments disclosed herein.

Claims (18)

1. a rotor for motor, including:
Unshakable in one's determination；
At least two magnet slot arranged on described iron core, arranges including the first magnet slot with relative to described first magnet slot The second magnet slot inside described iron core；
Wherein, have first every magnetic magnetic bridge between an end and the outer rim of described rotor of described first magnet slot, described Closing on of two magnet slot described first has second every magnetic magnetic bridge between the end and the outer rim of described rotor of magnetic magnetic bridge, described First every the width of magnetic magnetic bridge less than described second every the width of magnetic magnetic bridge.
Rotor the most according to claim 1, also includes being arranged in inside described iron core relative to described second magnet slot 3rd magnet slot, closing on of described 3rd magnet slot described second has between the end and the outer rim of described rotor of magnetic magnetic bridge 3rd every magnetic magnetic bridge, described second every the width of magnetic magnetic bridge less than the described 3rd every the width of magnetic magnetic bridge.
Rotor the most according to claim 1, between another end and the outer rim of described rotor of described first magnet slot Have the 4th and have the 5th every magnetic magnetic between magnetic magnetic bridge, another end and the outer rim of described rotor of described second magnet slot Bridge, the described 4th every the width of magnetic magnetic bridge less than the described 5th every the width of magnetic magnetic bridge.
Rotor the most according to claim 2, between another end and the outer rim of described rotor of described 3rd magnet slot Have the 6th every magnetic magnetic bridge, the described 5th every the width of magnetic magnetic bridge less than the described 6th every the width of magnetic magnetic bridge.
Rotor the most according to claim 3, described first every the magnetic magnetic bridge and the 4th width of at least one in magnetic magnetic bridge Degree scope is about 0.8-about 1.4mm.
Rotor the most according to claim 5, described second every the magnetic magnetic bridge and the 5th width of at least one in magnetic magnetic bridge Degree scope is about 1-about 1.6mm.
Rotor the most according to claim 4, the described 3rd every the magnetic magnetic bridge and the 6th width of at least one in magnetic magnetic bridge Degree scope is about 1.2-about 1.8mm.
Rotor the most according to claim 2, described first magnet slot includes U-shaped magnet slot, described second magnet slot and Three magnet slot include that two centres exist the magnet slot of the generally L-shaped in gap.
Rotor the most according to claim 1, also includes being arranged in inside described iron core relative to described second magnet slot 3rd magnet slot, described first magnet slot and described second magnet slot include that U-shaped magnet slot, the 3rd magnet slot include two centres There is the magnet slot of the generally L-shaped in gap, described 3rd magnet slot close on described second every the end of magnetic magnetic bridge with described Have the 3rd every magnetic magnetic bridge between the outer rim of rotor, described first every the width of magnetic magnetic bridge less than the described 3rd every the width of magnetic magnetic bridge Degree, the described 3rd every the width of magnetic magnetic bridge less than described second every the width of magnetic magnetic bridge.
Rotor the most according to claim 1, also includes the magnet being arranged in described magnet slot.
11. rotors according to claim 8 or claim 9, wherein said U-shaped magnet slot has the opening deviating from rotor center.
12. rotors according to claim 8 or claim 9, wherein said L-shaped magnet slot has the opening deviating from rotor center.
The rotor of 13. 1 kinds of motors, including:
Unshakable in one's determination；
The multiple magnet slot arranged from outside to inside on described iron core, the two ends of each in the plurality of magnet slot respectively with The edge of described iron core is formed every magnetic magnetic bridge；
Wherein magnet slot is further away from the center of described rotor, and the width every magnetic magnetic bridge corresponding to this magnet slot is the least.
14. rotors according to claim 13, the plurality of magnet slot includes first arranged according to order from outside to inside Magnet slot and the second magnet slot, described first magnet slot is U-shaped magnet slot, and described second magnet slot includes that centre exists gap The magnet slot of two generally L-shaped.
15. rotors according to claim 14, the width of at least one in magnetic magnetic bridge that described first magnet slot is corresponding Degree scope is about 0.8-about 1.4mm, and the width range of at least one in magnetic magnetic bridge that described second magnet slot is corresponding It is about 1-about 1.6mm.
16. rotors according to claim 14, the plurality of magnet slot also includes being positioned at inside described second magnet slot 3rd magnet slot, the width range of at least one in magnetic magnetic bridge corresponding to described 3rd magnet slot is about 1.2-about 1.8mm.
17. 1 kinds of motors, including:
Stator；
According to the rotor according to any one of claim 1-16.
18. 1 kinds of vehicles, including:
Motor, described motor includes: stator and according to the rotor according to any one of claim 1-16.
CN201610797821.1A 2016-08-31 2016-08-31 The rotor of motor, motor and vehicle Pending CN106300734A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111293806A (en) * 2018-12-10 2020-06-16 本田技研工业株式会社 Rotor and method for manufacturing arc magnet for rotor
CN114094740A (en) * 2020-07-31 2022-02-25 安徽威灵汽车部件有限公司 Rotor punching sheet, rotor, motor and vehicle
EP4096064A1 (en) * 2021-05-28 2022-11-30 Toyota Jidosha Kabushiki Kaisha A rotor of an electric rotating machine and an electric rotating machine comprising such a rotor

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CN102801236A (en) * 2012-03-05 2012-11-28 珠海格力节能环保制冷技术研究中心有限公司 Permanent magnet auxiliary synchronous reluctance motor and rotor thereof, and assembly method for motor
CN105009419A (en) * 2013-03-29 2015-10-28 株式会社东芝 Permanent magnet reluctance dynamo-electric machine
CN105745819A (en) * 2013-12-20 2016-07-06 三菱重工塑胶科技股份有限公司 Motor
CN206673714U (en) * 2016-08-31 2017-11-24 乐视汽车（北京）有限公司 Rotor, motor and the vehicle of motor

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Publication number Priority date Publication date Assignee Title
WO2009063350A2 (en) * 2007-11-13 2009-05-22 Askoll P & C S.R.L. Permanent magnet rotor for a synchronous electrical machine, particularly for a reluctance motor
CN102801236A (en) * 2012-03-05 2012-11-28 珠海格力节能环保制冷技术研究中心有限公司 Permanent magnet auxiliary synchronous reluctance motor and rotor thereof, and assembly method for motor
CN105009419A (en) * 2013-03-29 2015-10-28 株式会社东芝 Permanent magnet reluctance dynamo-electric machine
CN105745819A (en) * 2013-12-20 2016-07-06 三菱重工塑胶科技股份有限公司 Motor
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111293806A (en) * 2018-12-10 2020-06-16 本田技研工业株式会社 Rotor and method for manufacturing arc magnet for rotor
CN114094740A (en) * 2020-07-31 2022-02-25 安徽威灵汽车部件有限公司 Rotor punching sheet, rotor, motor and vehicle
CN114094740B (en) * 2020-07-31 2023-03-14 安徽威灵汽车部件有限公司 Rotor punching sheet, rotor, motor and vehicle
EP4096064A1 (en) * 2021-05-28 2022-11-30 Toyota Jidosha Kabushiki Kaisha A rotor of an electric rotating machine and an electric rotating machine comprising such a rotor
WO2022249147A1 (en) * 2021-05-28 2022-12-01 Toyota Jidosha Kabushiki Kaisha A rotor of an electric rotating machine and an electric rotating machine comprising such a rotor

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