CN113726118B - Multi-split tooth ratio multi-port magnetic field modulation motor - Google Patents

Multi-split tooth ratio multi-port magnetic field modulation motor Download PDF

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CN113726118B
CN113726118B CN202110936760.3A CN202110936760A CN113726118B CN 113726118 B CN113726118 B CN 113726118B CN 202110936760 A CN202110936760 A CN 202110936760A CN 113726118 B CN113726118 B CN 113726118B
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stator
teeth
modulation
split
rotor
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CN113726118A (en
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王海涛
朱恒
丁树业
魏梓强
李争亮
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Nanjing Normal University
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Nanjing Normal University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/145—Stator cores with salient poles having an annular coil, e.g. of the claw-pole type
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • 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
    • 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
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/04—Machines with one rotor and two stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The invention discloses a multi-split tooth ratio multi-port magnetic field modulation motor which comprises stators with different split tooth ratios and inner and outer rotors, wherein the stators are provided with electric ports, and the inner and outer rotors are provided with two mechanical ports. The stator of the motor is applied to the middle of the inner rotor and the outer rotor, and the stator teeth are used for modulating the magnetic fields of the inner air gap and the outer air gap. The number of teeth in the stator is less than the number of teeth outside the stator, the magnetic leakage of the stator teeth is less, and the utilization rate of the iron core is high. The annular winding is embedded into the inner and outer slots of the stator and connected across the stator yoke, the annular winding with three-phase sine alternating current can provide armature magnetic fields with different pole pairs for the inner and outer air gaps, and the pole pair number of the outer armature magnetic field is higher than that of the inner armature. The motor has the characteristics of double-speed output, large torque and wide operation range, has good heat dissipation, high power factor and low copper consumption, and is suitable for occasions requiring low-speed large torque and multi-speed operation, such as electric automobiles, full-electric airplanes and the like.

Description

Multi-split tooth ratio multi-port magnetic field modulation motor
Technical Field
The invention relates to a permanent magnet magnetic field modulation motor, in particular to a multi-split tooth ratio multi-port magnetic field modulation motor.
Background
With the improvement of the performance of the permanent magnet material and the expansion of the industrial application prospect, the permanent magnet motor replaces the traditional electrically excited motor with the advantages of high efficiency, high power density, reliable operation and the like to be widely applied to the fields of spaceflight, navigation, transportation and the like. In engineering, most permanent magnet motor driving systems adopt a combination of a high-speed motor and a mechanical gear to improve the torque density of the motor. However, such a combination causes a series of problems such as an increase in friction loss, an increase in noise, a decrease in efficiency, and a decrease in operational reliability. In order to solve the problems, a magnetic gear and a permanent magnet motor are combined by a motor researcher, a magnetic field modulation motor is provided, based on the magnetic gear effect, an armature magnetic field with higher rotation speed in the motor can be modulated into a harmonic magnetic field with lower rotation speed, and the harmonic magnetic field is coupled with a rotating magnetic field with lower pole pair number to generate large torque, so that the motor has the characteristic of low speed and large torque, the torque density of the motor is improved, and the magnetic field modulation motor is widely concerned by domestic and foreign scholars.
However, in the conventional magnetic field modulation motor, a set of windings and a stator are matched to drive a rotor to rotate, which is difficult to apply to the multi-port differential output occasion. However, the number of air gaps is increased by introducing an additional magnetic adjusting ring, the space utilization rate is low, harmonic distortion is large, and the running efficiency of the motor is low; in order to solve the problem, researchers also provide a birotor magnetic field modulation motor which adopts a structure with an upper slot and a lower slot, the number of single inner stator teeth and single outer stator teeth is fixed and equal, and the output capacities of two mechanical ports are the same, so that the application range is limited.
Disclosure of Invention
In order to realize the high-efficiency application of a magnetic field modulation motor in a multiport occasion, the invention provides a brand-new multiport magnetic field modulation motor with multiple split tooth ratios on the basis of exploring the technologies of a novel stator structure magnetic field modulation motor, a multiport magnetic field modulation motor with different numbers of modulation teeth which are uniformly distributed on the inner and outer edges in the circumferential direction, and a special annular winding wiring mode is adopted to generate a space armature magnetic field which can give consideration to both an inner rotor and an outer rotor. The invention has the characteristics of multi-port output, large torque and wide operation range, and has good heat dissipation, high power factor and low copper consumption of the motor due to the adoption of the connection mode of the annular winding, thereby having good development prospect in occasions requiring low-speed large torque and multi-speed operation, such as electric automobiles, full electric airplanes, and the like.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the following technical scheme:
a multi-split tooth ratio multi-port magnetic field modulation motor is provided with an electric port and two mechanical ports, wherein the electric port is a multi-split tooth ratio stator and a ring winding which are electrified and provided with an upper opening and a lower opening, and the mechanical ports are an inner rotor and an outer rotor with different magnetic pole pairs, and specifically comprises the following components:
the multi-split tooth ratio stator, inner rotor and outer rotor, the multi-split tooth ratio stator is placed between inner rotor and outer rotor, the multi-split tooth ratio stator includes:
the stator yoke is characterized in that stator teeth are uniformly distributed on the inner surface and the outer surface of the stator yoke along the circumferential direction of the stator yoke, and the inner layer of stator teeth and the outer layer of stator teeth are split or combined to form modulation teeth with different numbers, namely inner modulation teeth positioned on the inner surface of the stator yoke and outer modulation teeth positioned on the outer surface of the stator yoke; the inner modulation teeth are uniformly arranged at intervals on the inner surface of the stator yoke to form stator inner grooves; the outer modulation teeth are uniformly arranged on the outer surface of the stator yoke at intervals to form stator outer grooves;
the inner rotor comprises an inner rotor iron core and an inner rotor permanent magnet array circumferentially arranged on the outer surface of the inner rotor iron core;
the outer rotor comprises an outer rotor iron core and an outer rotor permanent magnet array circumferentially arranged on the inner surface of the outer rotor iron core;
the first layer of air gap is arranged between the inner rotor permanent magnet and the multi-split tooth ratio stator;
the second layer of air gap is arranged between the outer rotor permanent magnet and the multi-split tooth ratio stator;
and the annular winding is respectively embedded into the stator inner groove and the stator outer groove, an armature magnetic field is generated when three-phase sinusoidal current is conducted, and the first layer of air gap positioned on the inner layer and the second layer of air gap positioned on the outer layer are coupled with the inner rotor permanent magnetic field and the outer rotor permanent magnetic field by utilizing different armature magnetic field tooth harmonics to generate output torque.
Preferably, the number of teeth of the inner modulation teeth is different from that of the outer modulation teeth, the number of teeth of the inner modulation teeth is less than that of the outer modulation teeth, and the inner modulation teeth and the outer modulation teeth are arranged in the radial direction in the same direction or in a radial staggered manner.
Preferably, according to different splitting ratios, the inner stator teeth and the outer stator teeth are split or combined into modulation teeth with different numbers, and the number of the inner modulation teeth and the number of the outer modulation teeth meet the following formula:
Figure 446087DEST_PATH_IMAGE002
wherein,
Figure 956703DEST_PATH_IMAGE004
in order to modulate the number of teeth externally,
Figure 205282DEST_PATH_IMAGE006
the number of the inner modulation teeth is the same as the number of the inner modulation teeth,k isThe tooth ratio of the split teeth.
Preferably, the stator teeth form the modulation teeth in a symmetrically split or asymmetrically split manner.
Preferably, the ring windings are embedded in radially adjacent or offset inner and outer stator slots across the stator yoke connection.
Preferably, the inner rotor permanent magnet array and the outer rotor permanent magnet array are formed by alternately arranging high-remanence permanent magnets which are magnetized in the radial direction and have opposite magnetic pole directions, or are formed by alternately arranging high-remanence permanent magnets which are magnetized in the radial direction and have the same magnetic pole direction and rotor iron core poles.
The invention further discloses a multi-split tooth ratio multi-port magnetic field modulation motor, which is provided with two electrical ports and a mechanical port, namely a double-stator single-rotor motor, wherein the two electrical ports are respectively two sets of electrified armature windings wound on an inner stator and an outer stator, one mechanical port is a rotor positioned between the two stators, the two stators adopt a multi-split tooth structure, and the number of split teeth of the inner stator and the outer stator is different, and the multi-split tooth ratio multi-port magnetic field modulation motor specifically comprises the following steps:
an inner stator, an outer stator, and a rotor, the rotor being disposed between the inner stator and the outer stator,
a first layer of air gap is positioned between the inner stator and the rotor, and a second layer of air gap is positioned between the rotor and the outer stator; stator teeth are uniformly distributed in the outer stator and the outer stator along the circumferential direction, and the inner stator teeth and the outer stator teeth are split or combined to form modulation teeth with different numbers;
the inner stator is matched with the inner stator winding, the outer stator is matched with the outer stator winding,
the two sets of windings can work simultaneously or in a time-sharing manner, and when the two sets of windings work simultaneously, if the number of pole pairs of the inner winding and the outer winding meets the following conditions:
Figure 928387DEST_PATH_IMAGE008
that is, the inner and outer armature windings generate space armature magnetic fields with the same pole pair number in the inner and outer air gaps, so that the rotor can realize high torque density output;
wherein Z is so The number of teeth is modulated for the outer stator,p so is the number of pole pairs, Z, of the outer stator winding si The number of the modulation teeth of the inner stator,p si is the number of pole pairs of the winding of the inner stator,p r the number of the magnetic pole pairs of the rotor is,fis the frequency;
when working in time-sharing mode, the rotor acts independently under the action of the outer stator
Figure 834770DEST_PATH_IMAGE010
Rotating at a speed of revolutions per minute; under the action of the inner stator alone, the rotor
Figure 126074DEST_PATH_IMAGE012
Revolutions per minute.
The inner stator tempering teeth are uniformly arranged at intervals to form inner stator grooves, and the outer stator modulating teeth are uniformly arranged at intervals to form outer stator grooves;
the outer stator winding is embedded in the outer stator slot, and the inner stator winding is embedded in the inner stator slot.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) the invention adopts a stator structure with excellent performance and multiple split tooth ratios, adopts a mode that the inner surface and the outer surface are respectively grooved, and because of the difference of the split tooth ratios, the inner stator teeth and the outer stator teeth are split or combined into modulation teeth with different numbers, so that the armature generates space armature magnetic fields with different pole pairs in the inner air gap and the outer air gap, for the outer rotor, the difference between the pole pair number of the space armature magnetic field and the number of the modulation teeth is large, and the outer rotor with multiple permanent magnet pole pairs can be utilized to generate large output torque; for the inner rotor, the difference between the number of pole pairs of the magnetic field of the space armature and the number of modulation teeth is small, and the inner rotor with few number of pole pairs of the permanent magnet can be used for enabling the motor to obtain the characteristic of high-speed operation.
(2) The invention adopts the connection mode of the ring winding to be matched with the proposed multi-split teeth ratio stator structure, not only can the armature magnetic field of the inner rotor and the outer rotor be generated and simultaneously considered, but also the two groups of modulation teeth of the stator structure are respectively modulated into space armature magnetic fields with different pole pairs, and compared with the traditional connection modes of integer slot distributed winding, fractional slot centralized winding and the like, the winding mode has the advantages of simple assembly and easy heat dissipation, and can greatly reduce the use amount of copper wires due to short end parts, thereby improving the utilization rate of wires and reducing copper consumption and end part leakage reactance.
(3) Compared with the traditional multi-port magnetic field modulation motor, the multi-port magnetic field modulation motor with one electric port and two mechanical ports has the advantages that the number of air gap structures is increased due to no additional magnetic regulation structure, the output capacities of the inner mechanical port and the outer mechanical port are different, and the operating range is wide; meanwhile, the other structure of the invention is in a form of two electrical ports and one mechanical port, and by selecting different split tooth ratios, the inner and outer groups of electrified windings with different number of pole pairs generate space armature magnetic fields with the same number of pole pairs in the inner and outer air gaps, so that the single rotor can obtain the capacity of high power density output; on the other hand, a time-sharing working mode can be adopted, when the inner stator armature and the outer stator armature respectively work independently, the inner rotor armature and the outer rotor armature are respectively driven to rotate independently at different speeds, the working mode is essentially a structure that the inner rotor magnetic field modulation motor and the outer rotor magnetic field modulation motor with different rated rotating speeds share the rotor, the working mode is free to switch, and the application range is wider.
Drawings
FIG. 1 is a schematic cross-sectional view along an axis of a multi-split tooth ratio multi-port magnetic field modulation motor of the present invention;
wherein 2 is an outer rotor; 3 is a multi-split tooth ratio stator; 4 is a ring winding; 101 is a rotating shaft; 103 is an inner rotor permanent magnet; 202 is an outer rotor permanent magnet;
FIG. 2 is a schematic radial cross-sectional view of a multi-split tooth ratio, multi-port field modulated motor of the present invention;
wherein 4 is a ring winding; 102 is an inner rotor iron core; 301 is an outer modulation tooth; 302 is an inner modulation tooth; 305 is a stator yoke;
FIG. 3 shows the split tooth ratio of the multi-split-tooth-ratio multi-port magnetic field modulation motor of the present inventionk=2 stator three-dimensional exploded view;
wherein 303 is a stator inner groove; 304 is a stator outer slot;
FIG. 4 shows the split tooth ratio of the multi-split-tooth-ratio multi-port magnetic field modulation motor of the present inventionk=4 stator schematic;
FIG. 5 shows the split tooth ratio of the multi-split-tooth-ratio multi-port magnetic field modulation motor of the present inventionk=1 stator schematic;
FIG. 6 shows the split tooth ratio of the multi-split tooth ratio multi-port magnetic field modulation motor of the present inventionk=3 stator schematic;
FIG. 7 is a schematic diagram of the staggered arrangement of the inner and outer modulation teeth of the multi-split tooth ratio multi-port magnetic field modulation motor of the present invention;
FIG. 8 is a schematic diagram of asymmetric splitting of inner and outer modulation teeth of a multi-split tooth ratio multi-port magnetic field modulation motor according to the present invention;
FIG. 9 is a schematic diagram of a multi-split tooth ratio multi-port field modulated motor in which the ring windings are connected across slots;
FIG. 10 is a three-dimensional exploded view of the inner and outer rotors of a multi-split tooth ratio, multi-port magnetic field modulated motor of the present invention;
wherein 201 is an outer rotor iron core; 202 is an outer rotor permanent magnet;
FIG. 11 is a schematic structural view of the inner and outer rotors of the present invention;
wherein 104 is an inner rotor iron core pole, and 203 is an outer rotor iron core pole.
FIG. 12 shows the split tooth ratio of the multi-split tooth ratio multi-port magnetic field modulation motor of the present invention using a dual stator structurekRadial cross section of =1An intent;
wherein, 5 is an inner stator, 501 is an inner stator modulation tooth, 502 is an inner stator slot, 6 is an outer stator, 601 is an outer stator modulation tooth, 602 is an outer stator slot, 7 is an inner stator winding, 8 is an outer stator winding, and 9 is a rotor;
FIG. 13 shows the split tooth ratio of the multi-split tooth ratio multi-port magnetic field modulation motor of the present invention using a dual stator structurekSchematic radial cross-sectional view of = 2;
FIG. 14 shows the split tooth ratio of the multi-split tooth ratio multi-port magnetic field modulation motor of the present invention using a dual stator structurekSchematic radial cross-sectional view of = 3;
FIG. 15 is a schematic view of a rotor 9 of the multi-split tooth ratio multi-port field modulated motor of the present invention employing a dual stator configuration;
wherein 901 is a rotor permanent magnet pole, and 902 is a permanent magnet pole or an iron core pole with the opposite magnetizing direction to 901.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the specific embodiments in the specification.
A multi-split tooth ratio multi-port magnetic field modulation motor comprises a multi-split tooth ratio stator, a ring winding, an inner rotor and an outer rotor, wherein the multi-split tooth ratio stator is arranged between the inner rotor and the outer rotor, and air gaps are reserved between the inner rotor and the outer rotor.
The annular winding is connected in an annular mode and penetrates through the inner stator slot and the corresponding outer stator slot respectively, and a three-phase sinusoidal alternating current is introduced into the annular winding to generate a rotating armature magnetic field which gives consideration to the inner rotor and the outer rotor.
Furthermore, the invention adopts high remanence permanent magnets which are magnetized in the radial direction and have opposite directions to be arranged at intervals to form inner and outer rotor permanent magnets, the inner rotor permanent magnet and the outer rotor permanent magnet are respectively arranged on the outer side of the inner rotor and the inner side of the outer rotor to establish inner and outer permanent magnet magnetomotive force, and the rotating speeds of the motors are different when the motors work due to unequal magnetic pole pairs.
Furthermore, the multi-split tooth ratio stator comprises a stator yoke part, inner stator teeth and outer stator teeth, and the inner stator teeth and the outer stator teeth are split or combined into modulation teeth with different numbers according to different split tooth ratios.
Noting the number of modulation teeth as
Figure 986582DEST_PATH_IMAGE004
The number of the inner modulation teeth is
Figure 654324DEST_PATH_IMAGE006
Split tooth ratio ofkThe number of permanent magnet pole pairs of the outer rotor is
Figure DEST_PATH_IMAGE014
The number of permanent magnet pole pairs of the inner rotor is
Figure 385520DEST_PATH_IMAGE016
Then the number of modulation teeth satisfies:
Figure 972359DEST_PATH_IMAGE018
when three-phase sine alternating current is injected into the annular winding to generate a pole pair number of
Figure DEST_PATH_IMAGE020
The motor normally operates under the condition that the parameters satisfy the following formula:
Figure DEST_PATH_IMAGE022
Figure DEST_PATH_IMAGE024
。
example 1
As shown in fig. 1 and fig. 2, the invention discloses a multi-split tooth ratio multi-port magnetic field modulation motor, which comprises a multi-split tooth ratio stator 3, a ring winding 4, an inner rotor 1, an inner rotor permanent magnet 103, a rotating shaft 101, an outer rotor 2 and an outer rotor permanent magnet 202. A first layer of air gap is positioned between the inner rotor permanent magnet 103 and the multi-split tooth ratio stator 3, and a second layer of air gap is positioned between the outer rotor permanent magnet 202 and the multi-split tooth ratio stator 3; stator teeth are uniformly distributed on the inner surface and the outer surface of the stator yoke 305 along the circumference, and the inner layer of stator teeth and the outer layer of stator teeth are split or combined to form modulation teeth with different numbers; the inner modulation teeth and the outer modulation teeth are respectively and uniformly arranged at intervals to form a stator outer groove 304 and a stator inner groove 303, and the annular winding 4 is embedded into the stator inner groove 303 and the stator outer groove 304 which are in the same radial direction; the outer modulation teeth 301 and the inner modulation teeth 302 are both in the same radial direction; permanent magnet poles 103 which are opposite in magnetizing direction and are arranged alternately are uniformly pasted on the outer surface of the inner rotor 1 along the circumference, and outer rotor permanent magnets 202 which are opposite in magnetizing direction and are arranged alternately are uniformly pasted on the inner surface of the outer rotor 2 along the circumference;
the rotating shaft 101, the inner rotor 1, the inner rotor permanent magnet 103, the multi-split teeth ratio stator 3, the outer rotor 2 and the outer rotor permanent magnet 202 are all coaxially sleeved.
As shown in fig. 2, the toroidal winding 4 is inserted into the stator inner groove 303 and the stator outer groove 304, respectively, and three-phase sinusoidal alternating current is applied to the toroidal winding to generate armature magnetic fields, which are modulated by the inner modulation teeth 302 and the outer modulation teeth 301, respectively, and the inner and outer air gaps are coupled with the inner and outer rotor permanent magnet magnetic fields by using different armature magnetic field tooth harmonics to generate output torque.
As shown in fig. 2, 3, 4, 5, and 6, the outer modulation teeth 301 and the inner modulation teeth 302 are uniformly arranged on the inner and outer surfaces of the stator yoke 305, and both the two modulation teeth can be combined or split according to design requirements to achieve different splitting ratios. Except as shown in FIG. 3
Figure DEST_PATH_IMAGE026
In addition to the structure, the structure can be further developed into the structure shown in fig. 4, 5 and 6kRespectively 4, 1 and 3. Considering the factors of magnetic flux leakage, difficulty in equipment and the like, the number of the inner modulation teeth is generally required to be less than that of the outer modulation teeth, and then
Figure DEST_PATH_IMAGE028
Generally greater than 1; when in use
Figure DEST_PATH_IMAGE030
When the numbers of the inner modulation teeth and the outer modulation teeth are equal, the two mechanical ports operate synchronously. Tooth ratio of split
Figure 149525DEST_PATH_IMAGE028
The larger the difference between the outer rotor permanent magnet pole pair number and the inner rotor permanent magnet pole pair number is, the larger the difference between the rotating speeds of the inner mechanical port and the outer mechanical port is.
As shown in fig. 7, 8, and 9, the novel stator structure proposed by the present invention can be further developed into three asymmetric structures: the inner and outer modulation teeth can be arranged in the radial direction in the same direction or in a staggered manner;
as a preference of this embodiment, the inner and outer modulation teeth may adopt symmetrical splitting or asymmetrical splitting;
in this embodiment, the stator ring winding may be connected across the stator yoke by fitting the stator ring winding into the radially inner and outer slots of the stator in the same direction, or by fitting the stator ring winding into the inner and outer slots with a pitch different from one another.
When the novel stator structures are adopted, the torque pulsation can be reduced on the premise that the total output torque is reduced very little, and the output reliability of the motor is improved.
Example 2
As shown in fig. 12 and 13, the present invention further discloses a second structure of the multi-split teeth ratio multi-port magnetic field modulation motor, namely, a double stator electric port and a rotor 9 mechanical output port are adopted. The motor includes an outer stator 6, an inner stator 5, an outer stator winding 8, an inner stator winding 7, a rotor 9, and a rotation shaft 101. A first layer of air gap is positioned between the inner stator 5 and the rotor 9, and a second layer of air gap is positioned between the rotor 9 and the outer stator 6; stator teeth are uniformly distributed in the outer stator 6 and the outer stator 5 along the circumferential direction, and the inner stator teeth and the outer stator teeth are split or combined to form modulation teeth with different numbers; the inner and outer modulation teeth are respectively and uniformly arranged at intervals to form an outer stator groove 602 and an inner stator groove 502, the outer stator winding 8 is embedded into the outer stator groove, and the inner stator winding 7 is embedded into the inner stator groove; the outer stator modulation teeth 601 and the inner stator modulation teeth 501 are radial homodromous; the rotor 9 is a cup-shaped structure, 901 is a rotor permanent magnet pole, and 902 is a permanent magnet pole or an iron core pole with the opposite magnetizing direction to 901.
The outer stator 6, the rotor 9, the inner stator 5 and the rotating shaft 101 are coaxially sleeved.
As shown in fig. 12, the armature magnetic field is generated by passing three-phase sinusoidal alternating current through the two windings, and the armature magnetic field is modulated by the outer stator modulation teeth 601 and the inner stator modulation teeth 501, respectively, and is coupled with the permanent magnetic field generated by the rotor 9 in the inner and outer air gaps to generate output torque. Two sets of armature windings can work simultaneously and in a time-sharing mode. When the machine works simultaneously, if the number of pole pairs of the inner winding and the outer winding meets the following requirements:
Figure DEST_PATH_IMAGE032
the rotor can be made to achieve a high torque density output. When working in time-sharing mode, the rotor acts independently under the action of the outer stator
Figure 948853DEST_PATH_IMAGE034
Rotating at a speed of revolutions per minute; under the action of the inner stator alone, the rotor
Figure DEST_PATH_IMAGE036
Revolutions per minute. The working condition is that an inner rotor magnetic field modulation motor and an outer rotor magnetic field modulation motor share a rotor structure, and at the moment, the working mode is switched very conveniently and the working condition has the advantage of wide operating range.
As shown in fig. 12, the outer stator modulation teeth 601 and the inner stator modulation teeth 501 are uniformly arranged on the inner surface of the outer stator 6 and the outer surface of the inner stator 5, and both the two modulation teeth can be combined or split according to design requirements to achieve different split tooth ratios. Except as shown in FIG. 12kIn addition to the structure of =1, the structure shown in fig. 13 and 14 can be developed, in whichk=2、3。

Claims (5)

1. The utility model provides a multi-split teeth ratio multiport magnetic field modulation motor, has an electric port and two mechanical ports, and electric port is many split teeth ratio stator (3) and ring winding (4) of circular telegram upper and lower fluting, and mechanical port is inner rotor (1) and outer rotor (2) that the magnetic pole logarithm is different, specifically includes:
multi-split teeth ratio stator (3), inner rotor (1) and outer rotor (2), multi-split teeth ratio stator (3) is placed between inner rotor and outer rotor, characterized in that, multi-split teeth ratio stator (3) includes:
the stator yoke (305), the inside and outside surface of the stator yoke (305) distributes the stator teeth evenly along the stator yoke circumferencial direction, the inside and outside two-layer stator teeth are split or combined to form different modulation teeth, which are the inside modulation teeth (301) located on the inside surface of the stator yoke (305) and the outside modulation teeth (301) located on the outside surface of the stator yoke (305); the inner modulation teeth (301) are uniformly arranged at intervals on the inner surface of the stator yoke (305) to form stator inner grooves (303); the outer modulation teeth (301) are uniformly arranged on the outer surface of the stator yoke (305) at intervals to form stator outer grooves (304);
the inner rotor (1) comprises an inner rotor iron core (102) and an inner rotor permanent magnet (103) array which is circumferentially arranged on the outer surface of the inner rotor iron core (102);
the outer rotor (2) comprises an outer rotor iron core (201) and an outer rotor permanent magnet (202) array which is circumferentially arranged on the inner surface of the outer rotor iron core (201);
the first layer of air gap is arranged between the inner rotor permanent magnet (103) and the multi-split tooth ratio stator (3);
the second layer of air gap is arranged between the outer rotor permanent magnet (202) and the multi-split tooth ratio stator (3);
the annular winding (4) is respectively embedded into the stator inner groove (303) and the stator outer groove (304), an armature magnetic field is generated when three-phase sinusoidal current is conducted, and the first layer of air gap positioned on the inner layer and the second layer of air gap positioned on the outer layer are coupled with the inner rotor permanent magnet magnetic field and the outer rotor permanent magnet magnetic field by utilizing different armature magnetic field tooth harmonics to generate output torque;
according to different splitting ratios, the inner stator teeth and the outer stator teeth are split or combined into modulation teeth with different numbers, and the number of the inner modulation teeth and the number of the outer modulation teeth meet the following formula:
Figure DEST_PATH_IMAGE001
wherein,
Figure DEST_PATH_IMAGE002
in order to modulate the number of teeth externally,
Figure DEST_PATH_IMAGE003
the number of the inner modulation teeth is the same as the number of the inner modulation teeth,k isThe tooth ratio of the split teeth.
2. The multi-split teeth ratio multi-port magnetic field modulated motor of claim 1,
the number of teeth of interior modulation tooth (301) is different with the number of teeth of outer modulation tooth (302), and the number of teeth of interior modulation tooth (302) is less than the number of teeth of outer modulation tooth (301), and interior, outer modulation tooth are radial syntropy and arrange, or are radial dislocation arrangement.
3. The multi-split tooth ratio, multi-port magnetic field modulated electric machine of claim 1, wherein:
the stator teeth form the modulation teeth in a symmetrically split or asymmetrically split manner.
4. The multi-split tooth ratio, multi-port magnetic field modulated electric machine of claim 1, wherein:
the ring winding (4) is inserted in the radially adjacent or staggered inner and outer stator slots across the stator yoke (305).
5. The multi-split tooth ratio, multi-port magnetic field modulated electric machine of claim 1, wherein:
the inner rotor permanent magnet (103) array and the outer rotor permanent magnet (202) array are formed by alternately arranging high-remanence permanent magnets which are magnetized in the radial direction and have opposite magnetic pole directions, or are formed by alternately arranging high-remanence permanent magnets which are magnetized in the radial direction and have the same magnetic pole direction and rotor iron core poles.
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* Cited by examiner, † Cited by third party
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JP3096980B1 (en) * 1999-10-20 2000-10-10 西芝電機株式会社 Salient pole type rotor
CN103269140A (en) * 2013-05-03 2013-08-28 江苏大学 Birotor permanent magnet motor applied to wind power generation
CN111245187A (en) * 2020-02-27 2020-06-05 南京航空航天大学 Annular winding dual-rotor flux reversal motor

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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3096980B1 (en) * 1999-10-20 2000-10-10 西芝電機株式会社 Salient pole type rotor
CN103269140A (en) * 2013-05-03 2013-08-28 江苏大学 Birotor permanent magnet motor applied to wind power generation
CN111245187A (en) * 2020-02-27 2020-06-05 南京航空航天大学 Annular winding dual-rotor flux reversal motor

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