CN111769707A - Halbach array mixed permanent magnet stator double-partition motor - Google Patents

Halbach array mixed permanent magnet stator double-partition motor Download PDF

Info

Publication number
CN111769707A
CN111769707A CN202010519327.5A CN202010519327A CN111769707A CN 111769707 A CN111769707 A CN 111769707A CN 202010519327 A CN202010519327 A CN 202010519327A CN 111769707 A CN111769707 A CN 111769707A
Authority
CN
China
Prior art keywords
stator
permanent magnet
zone
motor
alnico
Prior art date
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
Application number
CN202010519327.5A
Other languages
Chinese (zh)
Inventor
莫丽红
郑刚旭
罗涛
李吉祥
张乃光
刘保连
张涛
鲁庆
叶小婷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaiyin Institute of Technology
Original Assignee
Huaiyin Institute of Technology
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 Huaiyin Institute of Technology filed Critical Huaiyin Institute of Technology
Priority to CN202010519327.5A priority Critical patent/CN111769707A/en
Publication of CN111769707A publication Critical patent/CN111769707A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • 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
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/15—Sectional machines
    • 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

Abstract

The invention relates to the technical field of motors, and discloses a Halbach array hybrid permanent magnet stator double-partition motor which comprises an inner-area stator, a middle rotor and an outer-area stator which are concentrically arranged. The inner zone stator comprises an inner zone stator iron core, a mixed permanent magnet of neodymium iron boron and aluminum nickel cobalt and a pulse magnetization winding wound on the aluminum nickel cobalt permanent magnet, wherein the neodymium iron boron and the aluminum nickel cobalt permanent magnet are alternately arranged outside the inner zone stator iron core along the circumference by a Halbach array. The cylindrical intermediate rotor is formed by alternately arranging magnetic conduction blocks and insulating blocks along the circumference; the outer zone stator comprises an outer zone stator core and an armature winding arranged on the outer zone stator core; the outer-zone stator core comprises an outer-zone stator yoke and outer-zone stator teeth which are uniformly distributed along the circumference and protrude from the inner side of the outer-zone stator yoke, and a concentrated armature coil is wound on each outer-zone stator tooth. Compared with the prior art, the invention can realize the low-speed large-torque, high-speed wide speed regulation and high-efficiency performance of the motor on the basis of realizing the magnetization and flux weakening field regulation of the stator partition motor, and is suitable for the field of electric automobiles.

Description

Halbach array mixed permanent magnet stator double-partition motor
Technical Field
The invention relates to the technical field of motor body design, in particular to a Halbach array mixed permanent magnet stator double-partition motor.
Background
As a key component of an electric vehicle, the performance of the motor has an important influence on the entire drive system. Aiming at the application characteristics of the electric automobile, the driving motor of the electric automobile has the advantages of larger torque output capacity, higher efficiency and wider speed regulation range.
At present, the permanent magnet flux switching motor is concerned due to a high torque density, high efficiency and high robust rotor structure. The structure is essentially a stator permanent magnet motor, the rotor is not provided with a winding and a permanent magnet, the winding and the permanent magnet are both positioned on the stator, and the motor has high air gap flux density due to the magnetism gathering effect of the permanent magnet on the stator, can realize larger torque output capacity, and has good application prospect. Meanwhile, the permanent magnet and the winding are arranged on the same component, namely the stator, in the motor, so that: 1. output torque aspect: the winding placing space is reduced, and the further improvement of the torque output capacity of the motor is limited. 2. In the aspect of motor installation: because the stator iron cores of the permanent magnet flux switching motor and the doubly salient stator permanent magnet motor are composed of discrete blocks, the difficulty of processing and installing the motors is increased. 3. Other properties: the stator permanent magnet motor has the advantages that the saturation degree of the stator magnetic field is high, the overload capacity of the motor is reduced, the temperature rise of the winding and the permanent magnet on the stator is increased by the structure, and the insulation damage of the winding and the irreversible demagnetization of the permanent magnet can be caused in serious cases.
Therefore, in 2015, the article "Novel electrical machinery having separate permanent magnet activation state" in volume 51 and the article "Novel double magnetic permanent magnets with separate stator and magnets rotor" in volume 51 and volume 5 of IEEE transport on magnetic systems in volume 4 and volume 51 propose a stator permanent magnet motor structure using stator partitions, wherein armature windings are located on an outer region stator and permanent magnets are located on an inner region stator, thereby solving the space conflict between the armature windings and the permanent magnets, relieving the temperature rise of the stator and improving the working stability of the permanent magnets.
However, since two air gaps exist between the two-partition stator and the rotor in the stator-partition permanent magnet motor, compared with the original single-air-gap stator permanent magnet motor, the air gap flux density and the output torque under the equal electrical load are weakened, and although the torque output can be improved by improving the electrical load in the motor, the efficiency is relatively reduced. Therefore, for the stator-partitioned motor, how to improve the flux density and efficiency of the permanent magnet air gap of the stator-partitioned permanent magnet motor is a concern.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a Halbach array mixed permanent magnet stator double-partition motor structure with high torque density and high efficiency, improves the no-load air gap flux density of a conventional stator partition permanent magnet motor, and is suitable for the field of electric automobile driving.
The technical scheme is as follows: the invention provides a Halbach array mixed permanent magnet stator double-partition motor which comprises an inner partition stator, a middle rotor and an outer partition stator, wherein the inner partition stator, the middle rotor and the outer partition stator are concentrically arranged;
an outer air gap is arranged between the outer zone stator and the middle rotor, and an inner air gap is arranged between the inner zone stator and the middle rotor;
the inner area stator comprises an inner area stator iron core, a permanent magnet arranged on the outer wall of the inner area stator iron core and a pulse magnetization winding arranged on the permanent magnet; the intermediate rotor comprises magnetic conduction blocks and insulation blocks which are staggered along the circumferential direction; the outer region stator comprises an outer region stator core and a stator core arranged on the outer region stator coremA phase armature winding;
the inner partition stator and the outer partition stator are fixedly connected with a motor shell, and the intermediate rotor is fixedly connected with a motor output shaft through a rotor bracket.
Further, the outer zone stator core includes an outer zone stator yoke andP souter area stator teeth uniformly protruding along the inner circumference of the outer area stator yoke, an outer area stator slot formed between any two adjacent outer area stator teethmThe phase armature windings are distributed on theP sIn the stator slot of the outer zone, the outer zone is wound on the stator teeth of the outer zone to meet the requirementP s=6nWhereinnIs a positive integer.
Further, the interrotor is composed ofqA block magnetic conductive block andqthe block insulating blocks are arranged in a staggered manner along the circumferential direction and satisfy 2q=P s±2kWhereinkIs a positive integer.
Further, the permanent magnets arranged on the outer wall of the inner zone stator core comprise fan-shaped annular neodymium iron boron permanent magnets and fan-shaped annular alnico permanent magnets which are arranged in a Halbach array; the outer circumference of the inner zone stator core is uniformly arrangedP sThe inner arc surface of the sector annular neodymium iron boron permanent magnet is tightly attached to the outer ring of the inner zone stator core,P sthe block neodymium iron boron permanent magnet is not directly connected in the circumferential direction to form a fan-shaped annular gap, the fan-shaped annular alnico permanent magnet is embedded in the gap, and two side faces of the fan-shaped annular alnico permanent magnet are respectively and closely attached to two side faces of the neodymium iron boron permanent magnet.
Further, the radial inner diameter of the fan-shaped alnico permanent magnet is larger than that of the fan-shaped neodymium iron boron permanent magnet, and the radial outer diameter of the fan-shaped alnico permanent magnet is smaller than that of the fan-shaped neodymium iron boron permanent magnet; form 2 inner district stator slots on every alnico permanent magnet radial both sides, the pulse magnetization winding is placed in inner district stator slot and is twined on the alnico permanent magnet.
Furthermore, the neodymium iron boron permanent magnet is made of rare earth neodymium iron boron permanent magnet material,P sthe magnetizing directions of the block neodymium iron boron permanent magnets are changed along the radial direction in an alternating mode, and the radial center lines of the block neodymium iron boron permanent magnets are overlapped with the radial center lines of the outer zone stator teeth.
Furthermore, the AlNiCo permanent magnet is made of AlNiCo permanent magnet material,P sthe magnetizing directions of the block AlNiCo permanent magnets are changed alternately along the tangential direction, and the radial central lines of the block AlNiCo permanent magnets are superposed with the radial central lines of the outer-zone stator slots.
Further, the pulse magnetization winding is a concentrated winding, the pulse magnetization winding concentrated winding coils are connected in series to form a single-phase pulse winding, and a short-time pulse current is applied to the single-phase pulse winding.
Has the advantages that:
1. on the basis of the structure of a conventional stator partition motor, the Halbach array permanent magnet structure containing the neodymium-iron-boron permanent magnet and the Alnico permanent magnet is adopted on the inner stator, and the characteristics that the Halbach array permanent magnet structure has magnetism gathering and weakening effects and the Alnico permanent magnet can be charged and demagnetized by short-time pulse current and the magnetic density of the Alnico permanent magnet can be memorized are utilized, so that the motor can realize the following effects: the motor operates in a magnetism gathering mode at low speed, the alnico permanent magnet is fully positively magnetized at the moment, the outer air gap main magnetic field of the permanent magnet is enhanced, and the inner air gap magnetic field is weakened, so that the air gap flux density and the torque output capacity of the motor can be improved, the iron loss of a stator core in an inner zone can be reduced, and the efficiency of the motor during low-speed operation is improved; the permanent magnet is operated in a flux weakening mode at high speed, the AlNiCo permanent magnet is fully reversely magnetized at the moment, an air gap magnetic field at the inner side of the permanent magnet is enhanced, a main magnetic field at the outer side of the permanent magnet is weakened, the air gap flux density is reduced, the speed regulation range of the motor is increased, and flux weakening is performed by adjusting the permanent magnet magnetic field, so that flux weakening current and copper consumption generated correspondingly are reduced, and the efficiency of the motor in high-speed operation is improved.
2. Because the motor adopts a stator permanent magnet type structure, the neodymium iron boron permanent magnet, the alnico permanent magnet and the pulse magnetization winding are all arranged on the inner partition stator, and the armature winding is arranged on the outer partition stator, the separation of the armature winding and the permanent magnet is realized, and the heat dissipation and the cooling of the motor are easier.
3. The intermediate rotor adopted by the motor has a simple structure, does not have permanent magnet materials or windings, only consists of the magnetic conduction blocks and the insulation blocks in an alternating mode, and is particularly suitable for high-speed operation.
Drawings
FIG. 1 is a schematic view of a radial cross-section structure of a Halbach array hybrid permanent magnet stator double-partition motor according to the invention;
FIG. 2 is a radial cross-sectional view of the outer section stator of the present invention;
FIG. 3 is a schematic view of an inner zone stator of the AlNiCo permanent magnet of the present invention during forward magnetization;
FIG. 4 is a schematic view of an inner zone stator of an AlNiCo permanent magnet of the present invention when magnetized in the reverse direction;
FIG. 5(a) is a schematic diagram of the "magnetization" of the permanent magnet field during forward magnetization of an AlNiCo permanent magnet; FIG. 5(b) is a schematic diagram of "weak magnetic" of the permanent magnet field when the alnico permanent magnet is reversely magnetized;
FIG. 6 (a) is the no-load magnetic field distribution of the motor when the alnico permanent magnet of finite element simulation is magnetized in the forward direction; FIG. 6(b) is the distribution of the motor no-load magnetic field when the AlNiCo permanent magnet of finite element simulation is magnetized reversely;
FIGS. 7 (a) and (b) are the magnetic flux density waveforms of the no-load inner and outer air gaps of the motor respectively when the AlNiCo permanent magnet is magnetized in the forward direction by finite element simulation; fig. 7(c) and (d) are the magnetic flux density waveforms of the no-load inner and outer air gaps of the motor respectively when the alnico permanent magnet of finite element simulation is magnetized reversely.
Wherein: 1. the magnetic field generator comprises an outer zone stator, 1-1 parts of outer zone stator iron core, 1-2 parts of armature winding, 1-3 parts of outer zone stator magnetic yoke, 1-4 parts of outer zone stator teeth, 1-5 parts of outer zone stator slots, 2 parts of intermediate rotor, 2-1 parts of magnetic conduction block, 2-2 parts of insulation block, 3 parts of inner zone stator, 3-1 parts of inner zone stator iron core, 3-2 parts of neodymium iron boron permanent magnet, 3-3 parts of alnico permanent magnet, 3-4 parts of pulse magnetization winding and 3-5 parts of inner zone stator slots.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The technical solution of the present invention will be specifically described by taking a 3-phase outer-zone stator 12 slot/interrotor 10 pole/inner-zone stator 12 pole stator divisional motor shown in fig. 1 as an example.
The motor of the present invention includes an inner zone stator 3 concentrically arranged, an interrotor 2 surrounding the inner zone stator 3, and an outer zone stator 1 surrounding the interrotor 2. As shown in fig. 1, an outer air gap is provided between the outer zone stator 1 and the interrotor 2, and an inner air gap is provided between the inner zone stator 3 and the interrotor 2.
The inner zone stator 3 comprises an inner zone stator iron core 3-1, a permanent magnet and a pulse magnetization winding 3-4 which are arranged on the inner zone stator iron core, the middle rotor 2 comprises a rotor bracket, a magnetic conduction block 2-1 and an insulation block 2-2, the outer zone stator 1 comprises an outer zone stator iron core 1-1 and an outer zone stator iron core 1-1mA phase armature winding 1-2; the inner partition stator 3 and the outer partition stator 1 are fixedly connected with a motor shell, and the middle rotor 2 is fixedly connected with a motor output shaft through a rotor bracket.
Referring to FIG. 2, the outer zone stator core 1-1 includes an outer zone stator yoke 1-3 andP souter area stator teeth 1-4 evenly protruding along the inner circumference of the outer area stator yoke 1-3, an outer area stator slot 1-5 is formed between any two adjacent outer area stator teeth 1-4,mthe phase armature windings 1-2 are distributed on theP sIn each outer zone stator slot 1-5, andmthe phase armature windings 1-2 are respectively wound on the outer region stator teeth 1-4 to meet the requirementP s=6nWhereinnIs a positive integer.
The interrotor 2 is composed ofqBlock magnetic conductive block 2-1 andqthe block insulating blocks 2-2 are arranged in a staggered manner along the circumferential direction and satisfy 2q=P s±2kWhereinkIs a positive integer.
Referring to fig. 3 and 4, the inner stator core 3-1 is circular and is uniformly arranged along the circumference of the outer ring of the inner stator core 3-1P sBlock fan ringThe shape of the neodymium iron boron permanent magnet is 3-2, and the inner arc surface of the neodymium iron boron permanent magnet 3-2 is closely attached to the outer ring of the stator core 3-1 of the inner zone.P sThe block neodymium iron boron permanent magnets 3-2 are not directly connected in the circumferential direction to form a sector annular gap, and the sector annular alnico permanent magnets 3-3 are embedded in the gap. Two side faces of the fan-shaped alnico permanent magnet 3-3 are tightly attached to the neodymium iron boron permanent magnet 3-2, the radial inner diameter of the fan-shaped alnico permanent magnet 3-3 is larger than the radial inner diameter of the fan-shaped alnico permanent magnet 3-2, the radial outer diameter of the fan-shaped alnico permanent magnet 3-3 is smaller than the radial outer diameter of the fan-shaped alnico permanent magnet 3-2, 2 inner area stator slots 3-5 are formed on two radial sides of each alnico permanent magnet 3-3, and a pulse magnetization winding 3-4 is placed in each inner area stator slot 3-5 and wound on the alnico permanent magnet 3-3 in a parallel.
The neodymium iron boron permanent magnet 3-2 is made of rare earth neodymium iron boron permanent magnet material,P sthe magnetizing directions of the block neodymium iron boron permanent magnets 3-2 are changed alternately along the radial direction, the center lines of the block neodymium iron boron permanent magnets are aligned with the center lines of the outer zone stator teeth 1-4, and the block neodymium iron boron permanent magnets and the outer zone stator teeth are on the same straight line. The AlNiCo permanent magnet 3-3 is made of AlNiCo permanent magnet material,P sthe magnetizing directions of the block AlNiCo permanent magnets 3-3 are changed alternately along the tangential direction, the central line of the block AlNiCo permanent magnets is aligned with the central line of the outer zone stator slots 1-5, and the block AlNiCo permanent magnets and the outer zone stator slots are on the same straight line. Because the alnico permanent magnetic material has the characteristic of low coercive force, the casting manufacturing process is adopted, the temperature stability is high, the alnico permanent magnetic material can be charged and demagnetized by short-time pulse current, the magnetic density level of the alnico permanent magnetic material can be memorized, and the air gap magnetic density of the motor can be flexibly adjusted.
The pulse magnetization windings 3-4 are concentrated windings,P sthe pulse magnetizing windings 3-4 are connected in series to form a single-phase pulse winding, and short-time pulse current is applied to the pulse windings to change the magnetizing level and the magnetizing direction of the alnico permanent magnets 3-3 to adjust the air gap magnetic field of the motor. Fig. 3 is a schematic view showing the magnetization direction of the permanent magnet on the stator of the inner zone when the alnico permanent magnet 3-3 is positively magnetized by a short-time pulse current. Fig. 4 is a schematic diagram showing the magnetization direction of the permanent magnet on the stator of the inner zone when the alnico permanent magnet 3-3 is reversely magnetized by the short-time pulse current.
Referring to fig. 5, a schematic diagram of the field regulation of the motor of the present invention is shown, wherein the flux linkage direction generated by the alnico permanent magnet 3-3 is shown by a dotted line, and the flux linkage generated by the ndfeb permanent magnet 3-2 is shown by a solid line.
As shown in FIG. 5(a), the AlNiCo permanent magnet 3-3 is completely magnetized in the forward direction, the flux linkage generated by the AlNiCo permanent magnet 3-3 and the NdFeB permanent magnet 3-2 passes through the inner and outer air gaps at the outer side of the permanent magnet, the main magnetic circuit formed by the magnetic conduction block 2-1 of the middle rotor 2 and the outer region stator core 1-1 has the same direction, when the permanent magnet flows through the inner zone stator iron core 3-1 at the inner side, the directions are opposite, so that the magnetic fields of the AlNiCo permanent magnet 3-3 and the NdFeB permanent magnet 3-2 at the outer side of the permanent magnet are mutually superposed to realize the magnetic enhancement of the main magnetic field, and the inner sides of the permanent magnets are weakened mutually to realize weak magnetism, and the motor has larger air gap flux density at the moment, is suitable for the working condition of low speed and large torque, simultaneously reduces the iron loss of the stator in the inner area, and improves the efficiency of the motor during low speed operation.
FIG. 5(b) shows a "high-speed weak magnetic speed regulation" mode, in which the AlNiCo permanent magnet 3-3 is completely magnetized in reverse direction, the flux linkage generated by the AlNiCo permanent magnet 3-3 and the NdFeB permanent magnet 3-2 passes through the inner and outer air gaps at the outer side of the permanent magnet, the middle rotor magnetic block 2-1 and the outer stator core 1-1 to form a main magnetic circuit in opposite directions, while the direction is the same when the permanent magnet flows through the inner zone stator iron core 3-1, so the main magnetic fields of the alnico permanent magnet 3-3 and the ndfeb permanent magnet 3-2 at the outer side of the permanent magnet are weakened mutually to realize weak magnetism, thereby realizing the purpose of widening the speed regulation range of the motor, and because the flux weakening is carried out by regulating the permanent magnetic field, therefore, the weak magnetic current and the copper consumption generated correspondingly are reduced, and the efficiency of the motor in high-speed operation is improved.
Fig. 6 and 7 show the distribution of the space-time magnetic field when the alnico permanent magnet 3-3 is completely magnetized in the forward and reverse directions in the motor of the present invention by finite element simulation. The magnetic force line distribution diagrams in fig. 6 (a) and fig. 6(b) are respectively consistent with the magnetic field distribution principle diagrams shown in fig. 5(a) and fig. 5(b), and fig. 7 (a), fig. 7 (b), fig. 7(c) and fig. 7 (d) show the remarkable changes of the inner and outer air gap magnetic densities when the alnico permanent magnet 3-3 is completely magnetized in the positive direction and the reverse direction, which shows that the motor of the invention has strong magnetizing and flux weakening capabilities, can realize the performance requirements of low-speed large torque, high-speed wide speed regulation range and high efficiency, and is suitable for the field of electric automobiles.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (8)

1. A Halbach array mixed permanent magnet stator double-partition motor is characterized by comprising an inner-partition stator (3) which is concentrically arranged, a middle rotor (2) which surrounds the inner-partition stator (3) and an outer-partition stator (1) which surrounds the middle rotor (2);
an outer air gap is arranged between the outer zone stator (1) and the middle rotor (2), and an inner air gap is arranged between the inner zone stator (3) and the middle rotor (2);
the inner area stator (3) comprises an inner area stator iron core (3-1), a permanent magnet arranged on the outer wall of the inner area stator iron core (3-1) and a pulse magnetization winding (3-4) arranged on the permanent magnet; the middle rotor (2) comprises magnetic conduction blocks (2-1) and insulation blocks (2-2) which are staggered along the circumferential direction; the outer zone stator (1) comprises an outer zone stator core (1-1) and a stator core (1-1) arranged on the outer zone stator coremA phase armature winding (1-2);
the inner partition stator (3) and the outer partition stator (1) are fixedly connected with a motor shell, and the middle rotor (2) is fixedly connected with a motor output shaft through a rotor support.
2. The Halbach array hybrid permanent magnet stator dual-zone machine according to claim 1, characterized in that the outer zone stator core (1-1) comprises an outer zone stator yoke (1-3) andP souter region stator teeth (1-4) uniformly protruding along the inner circumference of the outer region stator yoke (1-3), and an outer region stator slot (1-5) formed between any two adjacent outer region stator teeth (1-4)mPhase armature windings (1-2) are distributed over the phase windingsP sOuter region stator slot (1-5) Inner part and wound on the outer part of the stator teeth (1-4) to meet the requirementP s=6nWhereinnIs a positive integer.
3. The Halbach array hybrid permanent magnet stator double-split electrical machine according to claim 2, characterized in that the interrotor (2) consists ofqA block magnetic conduction block (2-1) andqthe block insulating blocks (2-2) are arranged in a staggered manner along the circumferential direction and satisfy 2q=P s±2kWhereinkIs a positive integer.
4. The Halbach array hybrid permanent magnet stator dual-zone machine according to claim 2, wherein the permanent magnets arranged on the outer wall of the inner zone stator core (3-1) comprise fan-shaped ring-shaped neodymium iron boron permanent magnets (3-2) and fan-shaped ring-shaped alnico permanent magnets (3-3) arranged in a Halbach array; the outer circumference of the inner region stator core (3-1) is uniformly arrangedP sThe ring-shaped neodymium iron boron permanent magnet (3-2) of the sector, the inner arc surface of the neodymium iron boron permanent magnet (3-2) is closely attached to the outer ring of the stator core (3-1) of the inner zone,P sthe block neodymium iron boron permanent magnet (3-2) is not directly connected in the circumferential direction to form a fan-shaped annular gap, the fan-shaped annular alnico permanent magnet (3-3) is embedded in the gap, and two side faces of the fan-shaped annular alnico permanent magnet (3-3) are respectively and closely attached to two side faces of the neodymium iron boron permanent magnet (3-2).
5. The Halbach array hybrid permanent magnet stator dual-split-zone motor of claim 4, wherein the radial inside diameter of the fan-ring-shaped AlNiCo permanent magnet (3-3) is larger than the radial inside diameter of the fan-ring-shaped NdFeB permanent magnet (3-2), and the radial outside diameter of the fan-ring-shaped AlNiCo permanent magnet (3-3) is smaller than the radial outside diameter of the fan-ring-shaped NdFeB permanent magnet (3-2); 2 inner-area stator slots (3-5) are formed on two radial sides of each alnico permanent magnet (3-3), and the pulse magnetization windings (3-4) are placed in the inner-area stator slots (3-5) and wound on the alnico permanent magnets (3-3).
6. The Halbach array hybrid permanent magnet stator double-zone motor according to claim 5, characterized in that the NdFeB permanent magnets (3-2) are made of rare earth NdFeB permanent magnet material,P sthe magnetizing directions of the block NdFeB permanent magnets (3-2) are changed along the radial direction in an alternating mode, and the radial center lines of the block NdFeB permanent magnets are aligned with the radial center lines of the outer zone stator teeth (1-4).
7. The Halbach array hybrid permanent magnet stator dual-split-zone motor of claim 5, wherein the AlNiCo permanent magnets (3-3) are made of AlNiCo permanent magnet material,P sthe magnetizing directions of the block AlNiCo permanent magnets (3-3) are changed alternately along the tangential direction, and the radial central lines of the block AlNiCo permanent magnets are aligned with the radial central lines of the outer zone stator slots (1-5).
8. The Halbach array hybrid permanent magnet stator double-division motor according to any one of claims 1-7, characterized in that the pulse magnetized windings (3-4) are concentrated windings, and the multiple pulse magnetized windings (3-4) are concentrated winding coils connected in series to form a single-phase pulse winding, to which short-time pulse current is applied.
CN202010519327.5A 2020-06-09 2020-06-09 Halbach array mixed permanent magnet stator double-partition motor Pending CN111769707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010519327.5A CN111769707A (en) 2020-06-09 2020-06-09 Halbach array mixed permanent magnet stator double-partition motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010519327.5A CN111769707A (en) 2020-06-09 2020-06-09 Halbach array mixed permanent magnet stator double-partition motor

Publications (1)

Publication Number Publication Date
CN111769707A true CN111769707A (en) 2020-10-13

Family

ID=72720390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010519327.5A Pending CN111769707A (en) 2020-06-09 2020-06-09 Halbach array mixed permanent magnet stator double-partition motor

Country Status (1)

Country Link
CN (1) CN111769707A (en)

Similar Documents

Publication Publication Date Title
CN102223036B (en) Hybrid excitation E-shaped iron core axial magnetic field permanent magnet brushless motor
CN1300914C (en) Controllable flux permanent magnetic synchronous motor of multiple pole number built-in mixed rotor magnetic path structure
CN109660097A (en) A kind of novel adjustable magnetic axial magnetic flux switching Halbach motor
CN110707841B (en) Magnetism-gathering type double-salient-pole hybrid permanent magnet memory motor
WO2020034637A1 (en) Built-in hybrid permanent-magnet memory motor having partially parallel magnetic circuits
CN112467950B (en) Rotor permanent magnet type dual-rotor axial magnetic field hybrid excitation flux switching motor
CN109274234A (en) A kind of compound rectifier excitation amorphous alloy axial direction reluctance motor
CN105553128B (en) A kind of mixed excited magnetic pass switch motor
CN113437849B (en) Double-rotor single-stator axial magnetic flux hybrid excitation motor
US20220014056A1 (en) Electric rotating machines with increased flux density
CN108110978A (en) A kind of bilateral hybrid excitation stator partition magnetic flux adjustable permanent-magnet motor of few rare earth
CN111181341A (en) Double-salient permanent magnet motor with adjustable number of effective permanent magnet poles
CN107124084B (en) Non-uniform mixed permanent magnet excitation topological structure of permanent magnet linear synchronous motor
CN110518766B (en) Asymmetric double-stator mixed excitation type axial magnetic field flux switching motor
CN108649768B (en) Hybrid excitation flux switching motor with stator having claw pole bypass structure
CN107276350B (en) Double-stator hybrid excitation motor
CN110138165B (en) Composite magnetic circuit stator split type axial permanent magnet motor
CN100426628C (en) Controllable flux permament magnetic synchronous motor of built-in mixed rotor magnetic path structure
CN110829652A (en) Series-parallel magnetic circuit mixed magnetic pole type memory motor
CN212278089U (en) Stator double-partition hybrid permanent magnet memory motor
CN116317422A (en) Novel double-stator magnetic field modulation memory motor
CN110676996A (en) Double-magnetic-circuit magnetic-regulation axial permanent magnet motor
CN111769707A (en) Halbach array mixed permanent magnet stator double-partition motor
CN115065212A (en) Novel stator partition double salient pole memory motor
CN210142972U (en) High-reluctance torque concentrated winding brushless motor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination