CN114726180A - Wide-narrow stator pole axial flux switch reluctance motor and control method thereof - Google Patents

Wide-narrow stator pole axial flux switch reluctance motor and control method thereof Download PDF

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Publication number
CN114726180A
CN114726180A CN202210516485.4A CN202210516485A CN114726180A CN 114726180 A CN114726180 A CN 114726180A CN 202210516485 A CN202210516485 A CN 202210516485A CN 114726180 A CN114726180 A CN 114726180A
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stator
wide
pole
narrow
poles
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Inventor
陈昊
于丰源
闫文举
刘永强
张珂
巩士磊
王星
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RONGCHENG RONGJIA POWER CO Ltd
Yantai Xianwei Electromechanical Co ltd
China University of Mining and Technology CUMT
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RONGCHENG RONGJIA POWER CO Ltd
Yantai Xianwei Electromechanical Co ltd
China University of Mining and Technology CUMT
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Priority to CN202210516485.4A priority Critical patent/CN114726180A/en
Publication of CN114726180A publication Critical patent/CN114726180A/en
Priority to PCT/CN2022/144411 priority patent/WO2023216635A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • 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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  • Synchronous Machinery (AREA)

Abstract

The invention discloses an axial flux switch reluctance motor with wide and narrow stator poles and a control method thereof, relates to the technical field of switch reluctance motors, and provides an axial flux switch reluctance motor scheme which is small in axial length, short in flux path, reliable in operation, high in power density and wide in rotating speed range. The structure of double-wide and narrow stator poles and the block rotor is adopted, a short magnetic circuit is formed between adjacent stator magnetic poles, high torque and power density are obtained, and a wide rotating speed range can be obtained by switching the connection mode of the left stator and the right stator in series or in parallel. The invention is suitable for the application field of in-wheel direct drive motors of electric automobiles.

Description

Wide-narrow stator pole axial flux switch reluctance motor and control method thereof
Technical Field
The invention belongs to the technical field of switched reluctance motors, and particularly relates to a wide and narrow stator pole axial flux switched reluctance motor and a control method thereof.
Background
The switched reluctance motor has simple and firm structure, flexible control and no need of maintenance, but also has the problems of low torque density, large torque pulsation, large noise and the like. In recent years, due to the increasing shortage and price increase of rare earth materials required for permanent magnet motors, the attractiveness of a switched reluctance motor drive is remarkably increased, and the switched reluctance motor drive is particularly attractive to the electric automobile industry with importance on cost and reliability. The axial flux motor has the characteristics of large output torque, short axial length, compact structure and the like, is superior to the same traditional radial magnetic field motor in the aspects of volume, weight, noise and the like, and is suitable for various mechanical devices requiring emergency starting, emergency stopping, accurate positioning and the like.
The switched reluctance motor is combined with the axial magnetic field structure to form the axial magnetic flux switched reluctance motor, and the axial magnetic flux switched reluctance motor has the comprehensive advantages of the switched reluctance motor and the axial magnetic field motor. The radial length of an axial flux switched reluctance machine from the outer diameter of the stator to the inner diameter of the stator is the effective area of the machine for generating torque. By proper magnetic circuit design, the stator and rotor cores can be fully utilized. Axial-flux machines are generally capable of providing higher torque and power densities than equivalent radial-flux machines. Meanwhile, the axial flux switch reluctance motor with small axial length is suitable for application occasions with special requirements on the motor size, such as an electric automobile hub motor.
Disclosure of Invention
The embodiment of the invention provides an axial flux switch reluctance motor with wide and narrow stator poles and a control method thereof, and provides an axial flux switch reluctance motor scheme which is small in axial length, short in flux path, reliable in operation, high in power density and wide in rotating speed range.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in the wide and narrow stator pole axial flux switched reluctance motor provided by the embodiment of the invention, a motor iron core comprises a left stator, a block rotor and a right stator which are axially arranged. The left stator and the right stator have the same salient pole structure and are composed of a stator yoke, a stator wide pole and a stator narrow pole, the stator wide pole and the stator narrow pole are separated, and a groove is formed between the stator wide pole and the stator narrow pole. The stator wide poles are wound with concentrated excitation windings, and the stator narrow poles are not wound with windings and only provide paths for excitation magnetic flux. The winding coils which are opposite in the radial direction on the stator at one side are connected in series and then connected in series or in parallel with the winding coils at the same position at the other side. The left stator and the right stator are oppositely arranged on two sides of the rotor, and an air gap is reserved between the left stator and the right stator. The rotor adopts a block structure, a plurality of block rotor iron cores are inserted into a rotor fixed disk, the surface of the rotor fixed disk made of epoxy resin materials which are not magnetic conductive and non-conductive is smooth, and the functions of isolating a magnetic circuit and reducing loss and wind resistance are achieved.
The wide and narrow stator pole switched reluctance motor is combined with the axial magnetic field structure to form the wide and narrow stator pole axial magnetic flux switched reluctance motor, and the wide and narrow stator pole axial magnetic flux switched reluctance motor has the comprehensive advantages of the switched reluctance motor and the axial magnetic field motor. By proper magnetic circuit design, the stator and rotor cores can be fully utilized. Axial-flux machines are generally capable of providing higher torque and power densities than equivalent radial-flux machines. Meanwhile, the axial flux switch reluctance motor with small axial length is suitable for application occasions with special requirements on the motor size, such as an electric automobile hub motor.
Compared with the prior art, the invention has the following remarkable advantages:
1. the wide and narrow stator pole switched reluctance motor is combined with the axial magnetic field structure to form the wide and narrow stator pole axial magnetic flux switched reluctance motor, and the switched reluctance motor has the advantages of simple structure, flexible control and the like, and also has the advantages of short axial length and high power density of the axial magnetic field motor.
2. The invention designs the stator pole into two structures of wide pole and narrow pole through a novel magnetic circuit design, the excitation winding is wound on the wide pole of the stator, and the narrow pole is not wound with the winding and only provides a path for the excitation magnetic flux. The opposite polarity configuration of the left stator winding coil and the right stator winding coil and the structural design of the block rotor enable the motor to obtain a shorter magnetic flux path, have a larger maximum-minimum inductance ratio and improve the operation efficiency and power density of the motor.
3. The rotor adopts the block structure, and is formed by inserting a plurality of block rotor iron cores into a rotor fixed disk made of epoxy resin materials, and the surface of the rotor fixed disk is smooth, so that the effects of isolating a magnetic circuit and reducing loss and wind resistance can be achieved. The epoxy resin material is neither magnetic nor conductive, and has low density, so that the rotational inertia of the rotor can be reduced, and the dynamic response speed of the motor can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic overall structural diagram of a wide-narrow stator pole axial flux switched reluctance motor according to an embodiment of the present invention;
fig. 2(a) is a schematic configuration diagram of left stator NNNSSS and right stator SSSNNN windings of the motor which are circumferentially expanded along the outer diameter according to the embodiment of the present invention;
fig. 2(b) is a schematic configuration diagram of left stator nsnsnsns and right stator SNSNSN windings which are circumferentially spread along the outer diameter of the motor according to the embodiment of the present invention;
FIG. 3 is a plan view of a rotor of a motor construction provided for an embodiment of the present invention;
fig. 4(a) is a schematic diagram of main magnetic flux of the aligned position (maximum inductance position) of the motor B according to the embodiment of the present invention;
fig. 4(B) is a schematic diagram of main magnetic flux at a phase misalignment position (minimum inductance position) of a motor B according to an embodiment of the present invention;
fig. 5(a) is a schematic diagram of a switch of an electric motor according to an embodiment of the present invention, in which an external circuit operates in a series mode;
fig. 5(b) is a schematic diagram of a switch of the motor according to the embodiment of the present invention, in which the external circuit operates in a parallel mode;
fig. 6 is a block diagram of a control system in a hybrid speed regulation control method for a motor according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating switching of control modes in the hybrid speed control method for a motor according to the embodiment of the present invention;
the various reference numbers in the drawings respectively represent: 1-left stator core, 2-right stator core, 3-rotor core, 1-left stator yoke, 1-2-left stator wide pole, 1-3-left stator narrow pole, 2-1-right stator yoke, 2-right stator wide pole, 2-3-right stator narrow pole, 3-1-block rotor, 3-2-rotor fixed disk, 4-misaligned position flux path, 5-aligned position flux path.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
An embodiment of the present invention provides a switched reluctance motor with a wide and narrow stator pole and an axial magnetic flux, as shown in fig. 1, the motor includes: left stator 1, right stator 2, rotor 3 and concentrated excitation winding.
The left stator 1 and the right stator 2 have the same structure, the left stator 1 is composed of a stator yoke 1-1, a stator wide pole 1-2 and a stator narrow pole 1-3, the right stator 2 is composed of a stator yoke 2-1, a stator wide pole 2-2 and a stator narrow pole 2-3, the stator wide pole and the stator narrow pole are separated, and a groove is formed between the stator wide pole and the stator narrow pole.
Concentrated windings are arranged in each slot, but only wound on the wide stator poles 1-2 and 2-2, and the narrow stator poles 1-3 and 2-3 are not wound with windings and only provide paths for excitation magnetic flux.
The left stator 1 and the right stator 2 are oppositely arranged on two sides of the rotor 3 in tooth pole, and an air gap is reserved between the two sides.
In this embodiment, the number of the slots of the single-side stator is NsThe number of the block rotors is NrAnd m is the number of motor phases. Then there is Ns＝2km，
Figure BDA0003639855000000031
Or
Figure BDA0003639855000000032
Wherein k is a positive integer. In the single-side stator, the number of wide poles and the number of narrow poles are equal
Figure BDA0003639855000000033
NrThe block rotors are distributed at equal intervals along the circumference, and the distribution interval is 360 degrees/Nr。
In a preferred scheme of the embodiment, the axial flux switched reluctance motor is in a 12k/10k three-phase structure, wherein the number of stator poles (slots) is 12k, the number of rotor poles is 10k, and k is a positive integer.
For example: as shown in fig. 1, the double-stator axial flux switched reluctance motor structure using 12 slots and 10 poles of wide and narrow stator poles has 12 stator poles on one side and 10 rotor blocks.
In this embodiment, there are two winding polarity configurations: firstly, as shown in fig. 2(a), the left stator adopts the polarity configuration of NNNSSS, and the right stator adopts the polarity configuration of SSSNNN; second, as shown in fig. 2(b), the left stator adopts nsnsnsns polarity configuration, and the right stator adopts snsnsnsn polarity configuration.
In a preferred version of this embodiment, the axial flux switched reluctance machine employs a NNNSSS winding polarity configuration.
Fig. 3 is a sectional view of a rotor plane of the wide-narrow stator pole axial flux switched reluctance motor structure, and it can be seen that the rotor 3 of the axial flux switched reluctance motor is composed of a block rotor core 3-1 and a non-magnetic fixed disk 3-2, and all the block rotor cores 3-1 are embedded on the non-magnetic fixed disk 3-2. The rotor fixing disc 3-2 is formed by laminating epoxy resin materials which are not conductive to magnetism and not conductive to electricity, and plays roles in isolating a magnetic circuit and reducing eddy current loss.
In the prior art, an excitation magnetic circuit of an axial flux switch reluctance motor is long, so that the excitation efficiency is low, and the loss is increased.
In the embodiment of the invention, the stator core of the wide-narrow stator pole axial magnetic flux switched reluctance motor is in a salient pole structure with wide poles and narrow poles staggered, the rotor core is in a block structure, the centralized winding is wound on the wide poles of the stators, and as shown in fig. 2, the polarities of winding coils in slots of the stators at two sides at the same position are opposite. Because of the characteristic that only one phase winding coil is placed in each slot, and the rotor adopts a block rotor structure, the excitation magnetic flux forms a short magnetic flux path between the adjacent wide poles of the stator and the narrow poles of the stator.
Defining misalignment positions: defining the alignment position of the stator wide-pole center line and the block rotor core center line as the misalignment position of the motor;
defining an alignment position: and defining the alignment position of the middle line of the wide pole of the stator and the middle line of the partitioned rotor slot as the alignment position of the motor.
Fig. 4(a) shows the flux path in the aligned position of the wide and narrow stator pole axial flux switched reluctance machine, and fig. 4(b) shows the flux path in the misaligned position of the wide and narrow stator pole axial flux switched reluctance machine.
It has been found that the main flux of the machine is generated by field windings mounted in the slots of the stator. In the rotor alignment position, magnetic flux generated by the winding in the left stator slot starts from the left stator wide pole 1-2, passes through the left stator yoke 1-1, passes through the adjacent stator narrow pole 1-3, passes through an air gap between the left stator narrow pole 1-3 and the rotor block 3, enters the rotor block 3, passes through the air gap between the rotor block 3 and the left stator wide pole 1-2, and returns to the stator wide pole 1-2 to form a closed magnetic circuit 4. The magnetic flux path generated by the winding coil of the stator on the right side is the same as the magnetic path generated by the stator on the left side.
At the position where the rotors are not aligned, because the polarities of the stator slots at opposite positions are opposite, magnetic flux generated by a winding in the left stator slot starts from a left stator wide pole 1-2, passes through a left stator yoke 1-1, passes through an adjacent stator narrow pole 1-3, passes through an air gap between the left stator narrow pole 1-3 and the rotor block 3, and enters the rotor block 3; meanwhile, magnetic flux generated by the winding in the right stator slot starts from the right stator wide pole 2-2, passes through the right stator yoke 2-1, passes through the adjacent stator narrow pole 2-3, passes through an air gap between the right stator narrow pole 2-3 and the rotor block 3, and also enters the rotor block 3 to form a magnetic circuit 5. It can be seen that the magnetic fluxes generated by the stators on both sides cancel each other out in the misaligned position, which results in a smaller misaligned flux linkage for the motor.
The invention also provides an excitation control circuit and a speed regulation control method of the axial flux switch reluctance motor. As shown in fig. 2, the winding coils of the stators on two sides of the motor in the same phase are connected in series or in parallel, and different connection modes can obtain different performances.
For the preferred scheme of this embodiment, the three-phase 12-slot 10-pole double-wide narrow-pole stator pole axial flux switched reluctance motor has 12 winding outgoing lines in total, as shown in fig. 2. And one phase winding coil of each side of the stator is provided with two connecting ends, namely a first connecting end and a second connecting end.
Each fixed-width sub-pole 1-1 is wound with an excitation coil, and the excitation coils are sequentially connected in series according to the connection shown in fig. 2 to form an excitation winding. Each set of coil has the same winding mode and has two connecting ends which are respectively a first connecting end and a second connecting end,
taking the stator phase a on the left as an example, two sets of coils which are opposite in the radial direction in space are in the same group, the first connection end of the first set of coils is used as the first outlet end AL + of the group of windings, the second connection end of the first set of coils is connected with the first connection end of the second set of coils in the same group, and the second connection end of the second set of windings is used as the second outlet end AL-. For the left stator B phase and C phase, the first wire outlet ends BL + and CL + and the second wire outlet ends BL-and CL-are also included.
In the same manner, stator phases A, B and C on the right have two wire outlets, namely first wire outlets AR +, BR + and CR + and second wire outlets AR-, BR-and CR-.
In this embodiment, the excitation control circuit is an asymmetric half-bridge circuit capable of providing series-parallel mode switching. The series mode is selected at low speed, and the parallel mode is switched at high speed, so that the high-efficiency rotating speed range of the motor is expanded, and the motor is particularly suitable for application occasions such as an electric automobile hub motor.
The asymmetric half-bridge is not described in detail here. A winding mode selection circuit consisting of two-sided stator winding coils and switches is mainly described. The switch described herein is a relay.
Specifically, the method comprises the following steps: the excitation control circuit shown in fig. 5 takes phase a as an example: the source of MOSFET switch tube SA1 is connected to the first wire outlet terminal AR + of winding AR, the source of MOSFET switch tube SA1 is connected to one end of relay SA3, the second wire outlet terminal AR-of winding AR is connected to one end of relay SA4 and one end of relay SA5, the other end of relay SA3 is connected to the other end of relay SA4, the other end of relay SA3 is connected to the first wire outlet terminal AL + of winding AL, the second wire outlet terminal AL-of winding AL is connected to the other end of relay SA5, and the second wire outlet terminal AL-of winding AL is connected to the drain of MOSFET switch tube SA 2.
The excitation control circuits of the B-phase and the C-phase are the same as those of the a-phase.
In the series mode, as shown in fig. 5(a), SA4, SB4, and SC4 are closed, and SA3, SB3, SC3, SA5, SB5, and SC5 are open. In the parallel mode, as shown in fig. 5(a), SA4, SB4, SC4 are open, and SA3, SB3, SC3, SA5, SB5, SC5 are closed.
In this embodiment, the speed regulation control method includes: and detecting the rotor position angle of the motor through a rotary encoder arranged on a motor rotating shaft to obtain the actual rotating speed of the motor. And detecting the currents of the AL phase, the AR phase, the BL phase, the BR phase, the CL phase and the CR phase of the motor through a current sensor.
With reference to fig. 6 and 7, the process of the hybrid speed regulation control method according to the present invention is described as follows, and the working state of the MOSFET switch tube in the asymmetric half bridge is not described herein again, and mainly introduces the on/off state of the relay: when the motor starts to operate, SA4, SB4 and SC4 are closed, SA3, SB3, SC3, SA5, SB5 and SC5 are open, and the motor works in a series mode; when the actual rotating speed value n of the motor is smaller than the reference rotating speed n1, the MOSFET switching tube selects a current chopping control method in a winding series mode; when the motor continues to accelerate, and the actual rotating speed of the motor is greater than n1 and less than n2, SA4, SB4 and SC4 are closed, SA3, SB3, SC3, SA5, SB5 and SC5 are opened, and meanwhile, the MOSFET switching tube selects the angle position control method in the winding series mode; when the actual rotating speed of the motor is larger than n2 and smaller than n3, the motor needs to be switched from a series mode to a parallel mode, SA4, SB4 and SC4 are open, SA3, SB3, SC3, SA5, SB5 and SC5 are closed, and meanwhile, the MOSFET switching tube selects a current chopping control method in a winding parallel mode; when the motor continues to accelerate and the actual rotating speed of the motor is greater than n3, SA4, SB4 and SC4 are opened, SA3, SB3, SC3, SA5, SB5 and SC5 are closed, and meanwhile the angular position control method in the winding parallel mode is selected through the MOSFET switching tubes.
The speed regulation method realizes the free switching of the series connection mode and the parallel connection mode of the motor windings by controlling the open circuit and the close of the relay. The control method is simple, and the rotating speed range of the wide-narrow stator pole axial magnetic flux switch reluctance motor is widened.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, the apparatus embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the description of the method embodiments for relevant points. The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A switched reluctance motor with wide and narrow stator poles and axial magnetic flux. The composition comprises: a left stator 1, a right stator 2 and a rotor 3. The left stator 1 and the right stator 2 have the same structure, and the left stator 1 is taken as an example and consists of a stator yoke 1-1, a stator wide pole 1-2 and a stator narrow pole 1-3, wherein the stator wide pole and the stator narrow pole are separated, and a groove is arranged between the stator wide pole and the stator narrow pole. Concentrated windings are wound only around the stator wide poles 1-2 and 2-2, while the stator narrow poles 1-3 and 2-3 are not wound, providing only a path for magnetic flux. The winding coils which are opposite in the radial direction on the stator at one side are connected in series and then connected in series or in parallel with the winding coils at the same position at the other side. The left stator 1 and the right stator 2 are oppositely arranged on two sides of the rotor 3 in tooth pole, and an air gap is reserved between the two sides. The rotor 3 is formed by several segmented rotors which are fixed in a circular rotor fixing disc.
2. The switched reluctance machine of claim 1, wherein a double stator disc and single rotor disc configuration is used, and stator teeth on two sides are oppositely mounted on the two sides of the rotor disc. Suppose NsIs the number of slots of the stator of the motor, NrThe number of the rotor core blocks is shown, and m is the number of motor phases. Then there is Ns＝2km，
Figure FDA0003639854990000011
Or
Figure FDA0003639854990000012
Wherein k is a positive integer.
3. The switched reluctance machine of claim 1, wherein the stator poles are staggered and extend from the stator yoke, and the number of stator poles is equal to the number of stator poles
Figure FDA0003639854990000013
4. The switched reluctance machine with wide and narrow stator poles and axial magnetic flux according to claim 1, wherein, in order to ensure the circulation of the excitation path, the pole arc angle of the stator wide poles at different radiuses is 2 times of the stator narrow poles, and the pole arc width of the rotor block and the pole width of the stator wide teeth are equal and 2 times of the width of the stator narrow poles.
5. The switched reluctance machine of claim 1, wherein the stator slots between adjacent stator teeth are parallel slot structures in order to ensure that the slot fill ratios of the machine are the same at different radii. The width of the pole arc of the narrow stator pole at the central line of the inner diameter and the outer diameter is equal to the height of the stator yoke, and the height of the rotor pole is twice as high as that of the stator yoke.
6. The wide and narrow stator pole axial flux switched reluctance machine of claim 1, wherein N isrThe block rotors are embedded in the rotor fixing disc made of epoxy resin materials which are not magnetic conductive and non-conductive, and the functions of isolating a magnetic circuit, reducing loss and wind resistance and improving efficiency are achieved.
7. The wide-narrow stator pole axial flux switched reluctance machine of claim 1, wherein the concentrated coil is wound only on the wide poles of the stator, the non-wound coil on the narrow poles of the stator provides only a closed magnetic path, and only one phase winding coil is placed per slot.
8. The switched reluctance motor with the wide and narrow stator poles and the axial magnetic flux as claimed in claim 1, wherein the concentrated coils of the stator on the same side, which are radially opposite, are connected in series to form an excitation winding, the stator windings on both sides can be connected in series or in parallel, and the motor characteristics obtained by different winding connection modes are different. According to different working condition requirements, the coils of the same phase of the stators on the two sides can be switched into two working modes of series connection and parallel connection. The excitation winding is connected with an external main circuit which is a modified asymmetric half-bridge circuit.
9. The switched reluctance motor with axial magnetic flux of wide and narrow stator poles as claimed in claim 1, wherein different control methods are selected according to different rotation speeds of the motor, i.e. a current chopping control method with the left and right windings connected in series at low speed, an angle position control method with the left and right windings connected in series at medium and low speed, a current chopping control method with the left and right windings connected in parallel at medium and high speed, and an angle position control method with the left and right windings connected in parallel at high speed. The free switching between the winding connection mode and the control method ensures the high-efficiency operation of the motor in a wider rotating speed range.
CN202210516485.4A 2022-05-12 2022-05-12 Wide-narrow stator pole axial flux switch reluctance motor and control method thereof Pending CN114726180A (en)

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CN202210516485.4A CN114726180A (en) 2022-05-12 2022-05-12 Wide-narrow stator pole axial flux switch reluctance motor and control method thereof
PCT/CN2022/144411 WO2023216635A1 (en) 2022-05-12 2022-12-31 Axial flux switched reluctance motor having wide and narrow stator poles, and control method therefor

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CN116191800A (en) * 2023-02-20 2023-05-30 中国矿业大学 Short magnetic circuit shaft radial mixed magnetic flux switch reluctance motor and control method
WO2023216635A1 (en) * 2022-05-12 2023-11-16 中国矿业大学 Axial flux switched reluctance motor having wide and narrow stator poles, and control method therefor

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CN104953743A (en) * 2014-03-27 2015-09-30 陈意辉 Electronic multi-gear variable-speed motor of electric vehicle and control system thereof
CN107104622B (en) * 2017-04-11 2019-04-09 南京邮电大学 A kind of control method of double winding composite construction magnetic suspension switched reluctance motor
CN108390529B (en) * 2018-03-21 2019-11-15 哈尔滨工业大学 Double-stator permanent magnet synchronous motor
CN109257000B (en) * 2018-11-15 2021-07-16 中国矿业大学 Wide-rotating-speed-range hybrid speed regulation control method for switched reluctance motor
CN114726180A (en) * 2022-05-12 2022-07-08 中国矿业大学 Wide-narrow stator pole axial flux switch reluctance motor and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023216635A1 (en) * 2022-05-12 2023-11-16 中国矿业大学 Axial flux switched reluctance motor having wide and narrow stator poles, and control method therefor
CN116191800A (en) * 2023-02-20 2023-05-30 中国矿业大学 Short magnetic circuit shaft radial mixed magnetic flux switch reluctance motor and control method
CN116191800B (en) * 2023-02-20 2023-12-22 中国矿业大学 Short magnetic circuit shaft radial mixed magnetic flux switch reluctance motor and control method

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