CN207884468U - A kind of permanent magnet direct driving motor - Google Patents
A kind of permanent magnet direct driving motor Download PDFInfo
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- CN207884468U CN207884468U CN201721629821.7U CN201721629821U CN207884468U CN 207884468 U CN207884468 U CN 207884468U CN 201721629821 U CN201721629821 U CN 201721629821U CN 207884468 U CN207884468 U CN 207884468U
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Abstract
The utility model embodiment discloses a kind of permanent magnet direct driving motor.The permanent magnet direct driving motor includes：Circular stator structure and circular rotor structure；Stator structure includes annular stator core, multiple armature winding and multiple stator permanent magnets；Stator core is in the annular surface for closing on rotor structure, it is peripherally disposed to have multiple stator modulation teeth, armature tooth and armature slot, according to the sequence cycle arrangement of stator modulation tooth, an armature slot, an armature tooth and another armature slot, armature winding is according to default winding method, stator modulation tooth and armature tooth are wound, is located in stator slot；Stator permanent magnet is corresponded with armature tooth, one end of rotor structure is closed on positioned at armature tooth, stator permanent magnet radially magnetizes；Rotor structure includes circular ring shape rotor core；Rotor core adjacent stator structure annular surface, it is along the circumferential direction alternate to be provided with multiple rotor tooths and rotor slot.The technical solution of the utility model embodiment can reduce the usage amount of permanent magnet.
Description
Technical field
The utility model is related to field of motor manufacturing more particularly to a kind of permanent magnet direct driving motors.
Background technology
Direct driving motor is because having broken away from intermediate gearing (such as mechanical gearbox, belt in the big torque system of conventional low
Wheel), eliminate that intermediate gearing brings as transmission efficiency is low, bulky, noise pollution needs many fiber crops such as periodic maintenance
It is tired, load running can be directly driven, therefore, in wind-power electricity generation, industrial robot, precision machine tool, oil pumping in oil fields system and ship
The low speed high torques application scenarios such as oceangoing ship propulsion have obtained the favor of people.With the appearance of high performance permanent magnetic materials, forever such as rare earth
The expansion of magnetic material and design of electrical motor principle, development and the use of high-performance permanent magnet direct driving motor is present motor-drive technique
Main trend.
For permanent magnet direct driving motor, a key factor for limiting its development is how to improve its torque density
(i.e. under unit volume or weight, electromagnetic torque peak value that motor can be provided).According to conventional motors theory, we can lead to
The electric load for improving motor and magnetic loading are crossed to improve the torque density of motor, traditional method is all to utilize the fundamental wave in air gap
Magnetic field generates torque.The promotion of torque density is limited by limited working face of air gap.It is set according to traditional design of electrical motor method
Meter motor is directly run under speed operation, and the number of pole-pairs of the armature winding of direct driving motor is often very much, is needed to design in this way and be permitted
More armature slots carry out coiling armature winding, and the volume of motor is caused to become larger.With the appearance of " magnetic field modulation " principle, magnetic field modulation type
Direct driving motor is of increased attention, and permanent magnet can be largely used on motor stator, can also largely be made on rotor
With permanent magnet is largely used on permanent magnet or even rotor simultaneously, the torque of the magnetic loading and motor of motor is greatly increased
Density；But cost increases.
Utility model content
The utility model embodiment provides a kind of permanent magnet direct driving motor, to reduce permanent magnet dosage, reduces motor and is produced into
This.
In a first aspect, the utility model embodiment provides a kind of permanent magnet direct driving motor, including：
Circular stator structure and circular rotor structure；
Stator structure and rotor structure are donut,
Stator structure includes annular stator core, multiple armature winding and multiple stator permanent magnets；
Stator core is peripherally disposed to have multiple stators modulation teeth, armature in the annular surface for closing on rotor structure
Tooth and armature slot,
Multiple stators modulation teeth, armature tooth and armature slot, according to stator modulation tooth, an armature slot, an armature tooth and another
The sequence cycle arrangement of one armature slot,
Armature winding is located at according to default winding method, winding stator modulation tooth and armature tooth in stator slot；
Stator permanent magnet is corresponded with armature tooth, and one end of rotor structure, stator permanent magnet edge are closed on positioned at armature tooth
Radial magnetizing；
Rotor structure includes circular ring shape rotor core；
Rotor core adjacent stator structure annular surface, it is along the circumferential direction alternate to be provided with multiple rotor tooths and rotor
Slot.
Further, rotor structure further includes multiple rotor permanent magnets,
Rotor permanent magnet is corresponded with rotor slot, and rotor permanent magnet is embedded in corresponding rotor slot, rotor permanent magnet edge
Radial magnetizing.
Further, the number of pole-pairs Pw=∣ Z1-Z2 ∣ of armature winding, wherein Z1 is the number of stator permanent magnet, and Z2 is to turn
The number of sub- permanent magnet.
Further, armature winding is injected or the rotating speed Ω r of the frequency f of sinusoidal ac and rotor structure that generate
Relationship is：60*f=Z2* Ω r.
Further, which is three phase electric machine.
Further, the number Zs of armature slot is 6 integral multiple, and there are positive integer N and integer k to make (N-1) *
+ 120 ° of establishments of 360 ° of * Pw/Zs=k*360 °, wherein N is less than or equal to Zs.
Further, stator core includes the first silicon steel sheet of multiple high magnetic properties, and multiple first silicon steel sheets are in an axial direction
Laminate arrangement.
Further, rotor core includes the second silicon steel sheet of multiple high magnetic properties, and multiple second silicon steel sheets are in an axial direction
Laminate arrangement.
Further, rotor permanent magnet and stator permanent magnet are rubidium iron B permanent magnetic material；Annular stator structure is located at ring
On the outside of shape rotor structure, alternatively, annular stator structure is located on the inside of annular rotor structure.
Further, the default winding method of armature winding includes centralization or distribution.
The technical solution of the utility model embodiment by it is peripherally disposed have multiple stators modulate teeth, armature tooth and
Armature slot, multiple stator modulation tooth, armature tooth and armature slot are according to stator modulation tooth, an armature slot, an armature tooth and another
The sequence cycle arrangement of one armature slot, for armature winding according to default winding method, winding stator modulation tooth and armature tooth, it is fixed to be located at
In pilot trench；Stator permanent magnet is corresponded with armature tooth, one end of rotor structure is closed on positioned at armature tooth, stator permanent magnet is along diameter
To magnetizing, compared to the mode that stator permanent magnet is embedded in armature notch, it is possible to reduce permanent magnet dosage reduces motor production
Cost.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for permanent magnet direct driving motor that the utility model embodiment provides；
Fig. 2 is that a kind of regional area stator permanent magnet for permanent magnet direct driving motor that the utility model embodiment provides generates
The distribution schematic diagram of permanent magnetic field；
Fig. 3 is a kind of coiling connection diagram for armature winding that the utility model embodiment provides；
Fig. 4 is the star-like figure of slot electromotive force of motor corresponding with Fig. 3；
Fig. 5 is the structural schematic diagram for another permanent magnet direct driving motor that the utility model embodiment provides；
Fig. 6 is a kind of oscillogram of the armature winding terminal voltage for permanent magnet direct driving motor that the utility model embodiment provides.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, it illustrates only for ease of description, in attached drawing and the relevant part of the utility model rather than entire infrastructure.
The utility model embodiment provides a kind of permanent magnet direct driving motor.Fig. 1 is one kind that the utility model embodiment provides
Permanent magnet direct driving motor is along the cross-sectional view perpendicular to axial direction, as shown in Figure 1, the permanent magnet direct driving motor includes：Circle
Annular stator structure 100 and circular rotor structure.
Wherein, stator structure 100 and rotor structure are donut, and stator structure 100 includes annular stator core
110, multiple armature winding 120 and multiple stator permanent magnets 130；Stator core 110 is on the annular surface for closing on rotor structure, edge
Circumferencial direction is provided with multiple stator modulation teeth 111, armature tooth 112 and armature slot 113, multiple stator modulation teeth 111, armature tooth
112 and armature slot 113, according to the suitable of stator modulation tooth 111, an armature slot 113, an armature tooth 112 and another armature slot 113
Sequence cycle arrangement, armature winding 120 are located at stator according to default winding method, winding stator modulation tooth 111 and armature tooth 112
In slot 113；Stator permanent magnet 130 is corresponded with armature tooth 112, and one end of rotor structure, stator are closed on positioned at armature tooth 112
Permanent magnet 130 radially magnetizes；Rotor structure includes circular ring shape rotor core 210；Rotor core 210 is in adjacent stator structure
100 annular surface is along the circumferential direction alternate to be provided with multiple rotor tooths 211 and rotor slot 212.
Wherein, stator permanent magnet 130 can be directed radially towards the direction in the center of circle and magnetize, and can also be radially away from circle
It magnetizes in the direction of the heart.Fig. 1 illustratively draws all stator permanent magnets 130 and is radially away from the feelings that the direction in the center of circle is magnetized
Condition.What the one end of armature tooth 112 and stator modulation tooth 111 far from rotor structure was connected together, which is equivalent to stator yoke
Portion.The one end of rotor tooth 211 far from stator structure 100 is connected together, which is equivalent to rotor yoke.Stator core
110 include the first silicon steel sheet of multiple high magnetic properties, and OO ＇ (are parallel to motor shaft extension to multiple first silicon steel sheets in an axial direction
Direction, motor shaft is located at the circle ring center position of circular stator structure and circular rotor structure) laminate arrangement.Rotor iron
Core 210 includes the second silicon steel sheet of multiple high magnetic properties, and OO ＇ laminate arrangement to multiple second silicon steel sheets in an axial direction.Optionally, fixed
Sub- permanent magnet 130 is rubidium iron B permanent magnetic material；Annular stator structure 100 is located on the outside of annular rotor structure, alternatively, annular stator
Structure 100 is located on the inside of annular rotor structure.Fig. 1 illustratively draws circular stator structure 100 and is located at circular rotor knot
The case where on the outside of structure.Optionally, which can be three phase electric machine.
It should be noted that stator modulation tooth 111, armature tooth 112 are equal with the number of stator permanent magnet 130, it is Z1,
The number Zs=2*Z1 of armature slot 113.Fig. 2 is a kind of regional area for permanent magnet direct driving motor that the utility model embodiment provides
The distribution schematic diagram for the permanent magnetic field that stator permanent magnet generates, the stator permanent magnet production in the other parts region of permanent magnet direct driving motor
The distribution of raw permanent magnetic field is identical with this or similar.As shown in Fig. 2, the magnetic with the air gap in 130 face region of stator permanent magnet
Field direction is to be radially away from center of circle direction, and the magnetic direction with the air gap in 111 face region of stator modulation tooth is radially to refer to
To center of circle direction.It follows that in air gap between stator structure 100 and rotor structure, there is stator permanent magnet 130 to inspire
It is circumferentially formed thereon alternately being directed radially towards for variation and the magnetic field in center of circle direction and is radially away from the magnetic field in center of circle direction, it will
Adjacent one is directed radially towards the magnetic field in center of circle direction and one and is radially away from the magnetic field in center of circle direction as a number of pole-pairs.If
The number of stator permanent magnet 130 is Z1, then the number of pole-pairs for the permanent magnetism fundamental wave magnetic field that stator permanent magnet 130 excites is Z1.Stator is forever
Magnet 130 and adjacent stator modulation tooth 111 constitute one to pole, and the number of pole-pairs that all stator permanent magnets 130 are constituted is Z1.Turn
The number of sub- tooth 211 is Z2, then it is positive integer that the number of pole-pairs of armature winding 120, which is Pw=∣ Z1-Z2 ∣, Z1, Z2 and Pw,.Into one
Step, so that permanent magnet direct driving motor is three-phase permanent direct driving motor, and the number of pole-pairs of armature winding 120 is Pw=∣ Z1-Z2 ∣,
Wherein, the number Zs of required armature slot 113 is 6 integral multiple, and there are positive integer N and integer k to make (N-1) * 360 ° of * Pw/
Zs=k*360 ° of+120 ° of establishments, wherein positive integer N is less than or equal to Zs.Optionally, the default winding method packet of armature winding 120
Include centralization or distributed.Fig. 3 is a kind of coiling connection diagram for armature winding that the utility model embodiment provides.Fig. 3
Illustratively draw the schematic diagram that armature winding is connected according to distributed coiling.Fig. 4 is the slot electromotive force of motor corresponding with Fig. 3
Star-like figure.Wherein, DD ＇ are the direction for being parallel to axial OO ＇, and the armature winding that will along the circumferential direction arrange is equivalent in Fig. 3
120, from the point of view of stator modulation tooth 111, armature tooth 112 and the expansion of armature slot 113 are paved, by taking the number of armature slot 113 is 24 as an example,
The number of pole-pairs of armature winding 120 is 2, and connecting terminal A and X correspond to the first phase in three-phase alternating current, such as A phases, connecting terminal B
The second phase in three-phase alternating current, such as B phases are corresponded to Y, connecting terminal C and Z correspond to the third phase in three-phase alternating current, such as
C phases, by being electrically connected with AC power or power receiving equipment, to realize the function of motor or generator.Wherein, by 24 armatures
Number consecutively is 1 to 24 to slot 113 from left to right, then this section of armature conductor both ends production being located in the armature slot 113 of reference numeral
The phasor of raw electromotive force will form star-like figure as shown in Figure 4, wherein the armature slot 113 and number for being j positioned at number are j+
The phasor for the electromotive force that armature conductor both ends in 12 armature slot 113 generate is identical, j 1,2 ... 12, illustratively, position
The phasor phase for the electromotive force that the armature conductor both ends in armature slot 113 that the armature slot 113 for being 1 in number and number are 13 generate
Together.
It should be noted that rotor tooth 211 is made of the material of high magnetic property, therefore the magnetic conductance of rotor tooth 211 is larger, turns
The magnetic conductance of pilot trench 212 is smaller, therefore the permanent magnetism fundamental wave magnetic field that Z1 excites the stator permanent magnet 130 of pole will be by Z2 rotor tooth 211
The harmonic field of Tiao Cheng ∣ Z1-Z2 ∣ numbers of pole-pairs.When Z2 is less than Z1, excited by the armature supply in armature winding 120
Pw is modulated the permanent magnetism fundamental wave magnetic field of pole by Z2 rotor tooth 211 with the Z1 of the excitation of stator permanent magnet 130 fundamental wave magnetic field of pole
Hou ∣ Z1-Z2 ∣ interact to pole harmonic field, realize and stablize electromechanical energy conversion.When Z2 be more than Z1 when, by armature around
The Pw of armature supply excitation in group 120 is to the fundamental wave magnetic field of pole, permanent magnetism fundamental waves of the Z1 excited with stator permanent magnet 130 to pole
Magnetic field modulates Hou ∣ Z1-Z2 ∣ by Z2 rotor tooth 211 and interacts to pole harmonic field, meanwhile, the electricity in armature winding 120
The Pw of pivot electric current excitation is to the fundamental wave magnetic field of pole by the harmonic wave of Z2 211 Tiao Cheng ∣ ∣ Z1-Z2 ∣-Z2 ∣=Z1 number of pole-pairs of rotor tooth
Magnetic field interacts with the Z1 permanent magnetism fundamental wave magnetic fields excited to the stator permanent magnet 130 of pole, realizes and stablize electromechanical energy conversion.
In realizing electromechanical energy conversion process, the Pw that is excited by armature supply in armature winding 120 to the fundamental wave magnetic field of pole, with
The Z1 that stator permanent magnet 130 excites modulates Hou ∣ Z1-Z2 ∣ to pole harmonic wave to the permanent magnetism fundamental wave magnetic field of pole by Z2 rotor tooth 211
The rotary speed in magnetic field is identical；The Pw of armature supply excitation in armature winding 120 is to the fundamental wave magnetic field of pole by Z2 rotor tooth
The harmonic field of 211 Tiao Cheng ∣ ∣ Z1-Z2 ∣-Z2 ∣=Z1 numbers of pole-pairs, the permanent magnetism base that the stator permanent magnet 130 of pole is excited with Z1
The rotary speed in wave magnetic field is identical.Armature winding 120 is injected or the frequency f of sinusoidal ac that generates and rotor structure turn
The relationship of fast Ω r is：60*f=(Z2) * Ω r.When armature winding 120 is passed through the alternating current of frequency f, in armature winding 120
Armature supply generates Pw=∣ Z1-Z2 ∣ to the rotation fundamental wave magnetic field of pole, the rotating speed Ω w of the rotation fundamental wave magnetic field and rotor structure
The magnitude relationship of rotating speed Ω r is：Pw* Ω w=Z2* Ω r.When external force drives rotor structure to be rotated with the speed of Ω r, armature around
Group 120 will send out the alternating current of frequency f.
The technical solution of the present embodiment has multiple stators to modulate tooth, armature tooth and armature slot by peripherally disposed,
Multiple stator modulation tooth, armature tooth and armature slot are according to stator modulation tooth, an armature slot, an armature tooth and another armature slot
Sequence cycle arrangement, according to default winding method, winding stator modulation tooth and armature tooth are located in stator slot armature winding；
Stator permanent magnet is corresponded with armature tooth, and one end of rotor structure is closed on positioned at armature tooth, and stator permanent magnet radially magnetizes,
Compared to the mode that stator permanent magnet is embedded in armature notch, it is possible to reduce permanent magnet dosage reduces motor production cost.
The utility model embodiment provides another permanent magnet direct driving motor.Fig. 5 be the utility model embodiment provide and
A kind of structural schematic diagram of permanent magnet direct driving motor, on the basis of the above embodiments, rotor structure further include multiple rotor permanent magnets
Body 220, rotor permanent magnet 220 are corresponded with rotor slot 212, and rotor permanent magnet 220 is embedded in corresponding rotor slot 212, are turned
Sub- permanent magnet 220 radially magnetizes.
Wherein, rotor permanent magnet 220 is rubidium iron B permanent magnetic material.Rotor permanent magnet 220 can be directed radially towards the center of circle
Direction magnetize, the direction that can also be radially away from the center of circle is magnetized.Fig. 5 illustratively draws all rotor permanent magnets 220
It is radially away from the case where direction in the center of circle is magnetized.The number of rotor permanent magnet 220 is equal to the number of rotor tooth 211, is
Z2.In air gap between stator structure 100 and rotor structure, there is rotor permanent magnet 220 to inspire and be circumferentially formed thereon friendship
The magnetic field for being directed radially towards center of circle direction for variation and the magnetic field for being radially away from center of circle direction, adjacent one is radially referred to
The magnetic field in center of circle direction is radially away from as a number of pole-pairs to the magnetic field in center of circle direction and one.Every piece of rotor permanent magnet 220
A pair of of pole is constituted with adjacent rotor tooth 211, the number of pole-pairs that all rotor permanent magnets 220 are constituted is Z2.Stator modulates tooth 111
The material of high magnetic property is made, therefore the magnetic conductance of stator modulation tooth 111 is larger, the magnetic conductance of armature slot 113 and armature tooth 112 compared with
It is small, therefore Z2 will modulate 111 Tiao Cheng ∣ Z2-Z1 of tooth to the permanent magnetism fundamental wave magnetic field that the rotor permanent magnet 220 of pole excites by Z1 stator
The harmonic field of ∣ numbers of pole-pairs.
Wherein, the number of pole-pairs Pw=∣ Z1-Z2 ∣ of armature winding, wherein Z1 is the number of stator permanent magnet 130, and Z2 is to turn
The number of sub- permanent magnet 220.Optionally, armature winding is injected or the frequency f of sinusoidal ac that generates and rotor structure
The relationship of rotating speed Ω r is：60*f=Z2* Ω r.
It should be noted that the permanent magnet direct driving motor is worked based on " bidirectional magnetic field mudulation effect " principle.It is so-called " double
To magnetic field modulation effect " be exactly permanent magnet direct driving motor stator permanent magnet excitation permanent magnetism fundamental wave magnetic field modulated by rotor tooth, turn
The permanent magnetism fundamental wave magnetic field of sub- permanent magnet excitation is modulated into a large amount of Gas-gap Magnetic Field Resonance Wave by stator modulation tooth, then utilizes harmonic wave magnetic
Electromechanical energy conversion is stablized in the realization that intercouples between.Stator modulates tooth 111, armature tooth 112 and stator permanent magnet 130
Number is equal, is Z1, the number Zs=2*Z1 of armature slot 113.The number of rotor permanent magnet 220 and rotor tooth 211 is Z2.
By taking the magnetic field harmonics to play a major role as an example, the number of pole-pairs for the permanent magnetism fundamental wave magnetic field that rotor permanent magnet 220 excites is Z2, stator
The number of the number of pole-pairs Z1 for the permanent magnetism fundamental wave magnetic field that permanent magnet 130 excites, rotor tooth 211 are Z2, and stator modulates the number of tooth 111
For Z1.The permanent magnetism fundamental wave magnetic field that Z2 excites the rotor permanent magnet 220 of pole modulates 111 Tiao Cheng ∣ Z2-Z1 ∣ of tooth by Z1 stator
To the harmonic field of pole；Z1 is to the permanent magnetism fundamental wave magnetic field of the excitation of stator permanent magnet 130 of pole by Z2 211 Tiao Cheng ∣ of rotor tooth
Z1-Z2 ∣ are to the harmonic field of pole, then number of pole-pairs Pw=∣ Z2-Z1 ∣=∣ Z1-Z2 ∣ of armature winding 120, then armature winding 120
The relationship for being injected or being generated the frequency f of sinusoidal ac and the rotating speed Ω r of rotor structure is：60*f=Z2* Ω r.Work as armature
When winding 120 is passed through the alternating current of frequency f, the rotation fundamental wave magnetic of armature supply Chan Sheng ∣ Z2-Z1 ∣ in armature winding 120 to pole
, the magnitude relationship of the rotating speed Ω w of the rotation fundamental wave magnetic field and the rotating speed Ω r of rotor structure are：Pw* Ω w=Z2* Ω r.When outer
When power drives rotor structure to be rotated with the speed of Ω r, armature winding 120 will send out the alternating current of frequency f.
Wherein, when Z2 is more than Z1, the Pw that is excited by armature supply in armature winding 120 to the fundamental wave magnetic field of pole,
The Z1 excited with stator permanent magnet 130 modulates Hou ∣ Z1-Z2 ∣ to extremely humorous to the permanent magnetism fundamental wave magnetic field of pole by Z2 rotor tooth 211
Wave magnetic field interaction；The Pw of armature supply excitation in armature winding 120 is to the fundamental wave magnetic field of pole, with rotor permanent magnet 220
It is mutual to pole harmonic field that the Z2 of excitation modulates the modulation Hou of tooth 111 ∣ Z2-Z1 ∣ to the permanent magnetism fundamental wave magnetic field of pole by Z1 stator
Effect；It is modulated that the Pw of armature supply excitation in armature winding 120 modulates tooth 111 to the fundamental wave magnetic field of pole by Z1 stator
Z2 stablizes machine to the harmonic field of pole, permanent magnetism fundamental wave magnetic field interactions of the Z2 excited with rotor permanent magnet 220 to pole, realization
Electric flux converts.
Wherein, when Z2 is less than Z1, the Pw that is excited by armature supply in armature winding 120 to the fundamental wave magnetic field of pole,
The Z1 excited with stator permanent magnet 130 modulates Hou ∣ Z1-Z2 ∣ to extremely humorous to the permanent magnetism fundamental wave magnetic field of pole by Z2 rotor tooth 211
Wave magnetic field interaction；The Pw of armature supply excitation in armature winding 120 is to the fundamental wave magnetic field of pole, with rotor permanent magnet 220
It is mutual to pole harmonic field that the Z2 of excitation modulates the modulation Hou of tooth 111 ∣ Z2-Z1 ∣ to the permanent magnetism fundamental wave magnetic field of pole by Z1 stator
Effect；The Pw of armature supply excitation in armature winding 120 is to the fundamental wave magnetic field of pole by Z2 modulated Z1 pairs of rotor tooth 211
The harmonic field of pole, the Z1 excited with stator permanent magnet 130 interact to the permanent magnetism fundamental wave magnetic field of pole, realize and stablize electromechanical energy
Amount conversion.
It should be noted that the number of pole-pairs in the above-mentioned arbitrary two kinds of magnetic fields that can be interacted is identical, and the rotation in magnetic field
Speed is identical.The Pw excited by the armature supply in armature winding 120 swashs the fundamental wave magnetic field of pole with stator permanent magnet 130
The Z1 of hair modulates rotary speeies of the Hou ∣ Z1-Z2 ∣ to pole harmonic field to the permanent magnetism fundamental wave magnetic field of pole by Z2 rotor tooth 211
It is identical；The Pw of armature supply excitation in armature winding 120 is to the fundamental wave magnetic field of pole, Z2 pairs excited with rotor permanent magnet 220
The permanent magnetism fundamental wave magnetic field of pole is identical to the rotary speed of pole harmonic field by the Z1 stator modulation modulation Hou of tooth 111 ∣ Z2-Z1 ∣；
The Pw of armature supply excitation in armature winding 120 modulates modulated Z2 pairs of tooth 111 to the fundamental wave magnetic field of pole by Z1 stator
The harmonic field of pole is identical to the rotary speed of permanent magnetism fundamental wave magnetic field of pole as the Z2 excited of rotor permanent magnet 220；Armature winding
The Pw of armature supply excitation in 120 to the fundamental wave magnetic field of pole by Z2 211 modulated Z1 of rotor tooth to the harmonic field of pole,
It is identical to the rotary speed of permanent magnetism fundamental wave magnetic field of pole as the Z1 excited of stator permanent magnet 130.
The three-phase permanent direct driving motor that the utility model embodiment provides, stator permanent magnet 130 are located under armature tooth 112
Rather than in armature slot, every piece of stator permanent magnet 130 radially magnetizes, every piece of stator permanent magnet 130 and the modulation of neighbouring stator
Tooth 111 constitutes a pair of of pole.Compared with stator permanent magnet 130 to be embedded in the mode of notch of armature slot, stator permanent magnet 130 is apparent
It is a half, therefore, the three-phase permanent direct driving motor that the utility model embodiment provides, which has, reduces permanent magnet dosage, reduces electricity
The advantages of saturation of machine production cost and reduction electric machine iron core.
Illustratively, as shown in figure 5, stator permanent magnet 130 and rotor permanent magnet 220 all radially magnetize.Armature
The number of slot is 24, i.e. Zs=24, is 6 multiple.Stator modulates the number of tooth 111, the number of armature tooth 112, stator permanent magnet
The number of pole-pairs that the number and stator permanent magnet 130 of body 130 are constituted is 12, i.e. Z1=Zs/2.The number of rotor tooth 211 turns
The number of pole-pairs that the number and rotor permanent magnet 220 of sub- permanent magnet 220 are constituted is 14, i.e. Z2=14.It is necessary according to Z1, Z2 and Pw
The number of pole-pairs Pw of the relational expression of satisfaction, the composition of three-phase windings is necessary for 2, i.e. Pw=2.It is not difficult to find out, there are N=5, k=0 to make
It obtains * 360 ° of (N-1)+120 ° of * Pw/Zs=k*360 ° to set up, that is, illustrates that this motor can lay out three according to winding number of pole-pairs Pw=2
Phase armature winding.As shown in Figure 3 and Figure 4, be set forth in figure in the present embodiment the star-like figure of machine winding slot electromotive force and around
Group connection figure.
Illustratively, as shown in figure 5, by taking the magnetic field harmonics to play a major role as an example, the rotor permanent magnet 220 of 14 pairs of pole swashs
The permanent magnetism fundamental wave magnetic field of hair is modulated the harmonic field that tooth 111 is modulated into 2 pairs of pole by 12 stators；At the same time, 12 determine pole
The permanent magnetism fundamental wave magnetic field that sub- permanent magnet 130 excites also is modulated into the harmonic field of 2 pairs of pole by 14 rotor tooths 211.When armature around
Group 120 is when being passed through the alternating current of certain frequency, the fundamental wave magnetic field of 2 pairs of pole that armature supply generates simultaneously with stator and rotor permanent-magnet magnetic
Stable torque output is realized in the harmonic field interaction of the modulated 2 pairs of pole in field, and motor is operated in electric motor state at this time.When
When Injection Current frequency is 28Hz, the rotating excitation field rotating speed that armature supply generates is 60*28/2=840r/min, rotor knot
Structure will be rotated with the speed of 840*2/14=120r/min.When motor is operated in Generator Status, i.e., when external force drives rotor knot
When structure is rotated with the speed of 120r/min, 2 pairs of pole harmonic fields that tooth 111 and rotor tooth 211 modulate are modulated by stator and also will
It is rotated with certain speed, the harmonic field of the movement is coupled with armature winding, to generate the sense of 28Hz at armature winding both ends
Answer voltage.As shown in fig. 6, Fig. 6 is a kind of armature winding terminal voltage for permanent magnet direct driving motor that the utility model embodiment provides
Oscillogram, horizontal axis indicates that time, the longitudinal axis indicate that voltage, A phases, B phases and the C phase voltages of armature winding are three phase sine voltage.
When external force drives rotor to be rotated with the speed of 120r/min, threephase armature winding will produce the period as 0.036s's (corresponding 28Hz)
Induced voltage.
The implementation case is only intended to clearly illustrate done citing, and does not limit the embodiments.For institute
For the technical staff in category field, according to formula | Z1-Z2 |=Pw, Z1=Zs/2, adjust Zs, Z2 can by the design of electrical motor at
The different inner-rotor type of stator and rotor permanent magnet pole logarithm and outer-rotor type permanent magnet direct driving motor.According to winding connection or determine
The different of rotor permanent magnet magnetizing direction can derive many kinds of motors again.It is worth noting that * 360 ° of * of formula (N-1)
Pw/Zs=k*360 °+120 ° are in order to ensure the condition that the utility model motor can lay out three-phase windings and meet, for this
For the technical staff in field, do not change the electric machine structure that the utility model is proposed, it is easy can be by the utility model institute
The motor of proposition turns to multi-phase permanent direct driving motor, and such case ought to be protected by this patent.In addition, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give thoroughly all embodiments
It lifts.And among the protection domain that obvious changes or variations extended from this are created still in the utility model.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious variation is readjusted, be combined with each other and is substituted without departing from the scope of protection of the utility model.Therefore, although passing through
Above example is described in further detail the utility model, but the utility model is not limited only to the above implementation
Example can also include other more equivalent embodiments in the case where not departing from the utility model design, and the utility model
Range is determined by scope of the appended claims.
Claims (10)
1. a kind of permanent magnet direct driving motor, which is characterized in that including
Circular stator structure and circular rotor structure；
The stator structure and the rotor structure are donut,
The stator structure includes annular stator core, multiple armature winding and multiple stator permanent magnets；
The stator core in the annular surface for closing on the rotor structure, it is peripherally disposed have multiple stators modulation teeth,
Armature tooth and armature slot,
The multiple stator modulation tooth, armature tooth and armature slot, according to a stator modulation tooth, an armature slot, an institute
The sequence cycle arrangement of armature tooth and another armature slot is stated,
The armature winding winds the stator modulation tooth and the armature tooth, is located at the stator according to default winding method
In slot；
The stator permanent magnet is corresponded with the armature tooth, and one end of the rotor structure is closed on positioned at the armature tooth,
The stator permanent magnet radially magnetizes；
The rotor structure includes circular ring shape rotor core；
The rotor core in the annular surface for closing on the stator structure, it is along the circumferential direction alternate be provided with multiple rotor tooths and
Rotor slot.
2. permanent magnet direct driving motor according to claim 1, which is characterized in that the rotor structure further include multiple rotors forever
Magnet,
The rotor permanent magnet is corresponded with the rotor slot, and the rotor permanent magnet is embedded in corresponding rotor slot, described
Rotor permanent magnet radially magnetizes.
3. permanent magnet direct driving motor according to claim 2, which is characterized in that the number of pole-pairs Pw=∣ Z1- of the armature winding
Z2 ∣, wherein Z1 is the number of the stator permanent magnet, and Z2 is the number of the rotor permanent magnet.
4. permanent magnet direct driving motor according to claim 3, which is characterized in that the armature winding is injected or generated just
The frequency f of string alternating current and the relationship of the rotating speed Ω r of the rotor structure are：60*f=Z2* Ω r.
5. permanent magnet direct driving motor according to claim 3, which is characterized in that the permanent magnet direct driving motor is three phase electric machine.
6. permanent magnet direct driving motor according to claim 5, which is characterized in that the number Zs of the armature slot is 6 integer
Times, and there are N and k, and * 360 ° of (N-1)+120 ° of * Pw/Zs=k*360 ° are set up, wherein N is positive integer, and k is integer, and N is small
In or equal to Zs.
7. permanent magnet direct driving motor according to claim 1, which is characterized in that the stator core includes multiple high magnetic conductivity
First silicon steel sheet of energy, multiple first silicon steel sheets laminate arrangement in an axial direction.
8. permanent magnet direct driving motor according to claim 2, which is characterized in that the rotor core includes multiple high magnetic conductivity
Second silicon steel sheet of energy, multiple second silicon steel sheets laminate arrangement in an axial direction.
9. permanent magnet direct driving motor according to claim 1, which is characterized in that the rotor permanent magnet and the stator permanent magnet
Body is rubidium iron B permanent magnetic material；The annular stator structure is located on the outside of the annular rotor structure, alternatively, described cyclic annular fixed
Minor structure is located on the inside of the annular rotor structure.
10. permanent magnet direct driving motor according to claim 2, which is characterized in that the default winding method of the armature winding
Including centralization or distribution.
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| CN201721629821.7U CN207884468U (en) | 2017-11-29 | 2017-11-29 | A kind of permanent magnet direct driving motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733197A (en) * | 2017-11-29 | 2018-02-23 | 南方科技大学 | A kind of permanent magnet direct driving motor |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733197A (en) * | 2017-11-29 | 2018-02-23 | 南方科技大学 | A kind of permanent magnet direct driving motor |
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