CN114825725A - Low-cost axial permanent magnet motor and control system thereof - Google Patents
Low-cost axial permanent magnet motor and control system thereof Download PDFInfo
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- CN114825725A CN114825725A CN202210535717.0A CN202210535717A CN114825725A CN 114825725 A CN114825725 A CN 114825725A CN 202210535717 A CN202210535717 A CN 202210535717A CN 114825725 A CN114825725 A CN 114825725A
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- 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
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- 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
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- 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
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2788—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K47/00—Dynamo-electric converters
- H02K47/02—AC/DC converters or vice versa
- H02K47/04—Motor/generators
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Abstract
The application provides a low-cost axial permanent-magnet machine and control system thereof relates to motor technical field, and this permanent-magnet machine includes: the rotor comprises a rotating shaft, two rotors arranged on the rotating shaft and a stator positioned between the two rotors; the rotor comprises an end disc, a permanent magnet and a magnetic resistance, wherein the permanent magnet and the magnetic resistance have the same structure and size and are symmetrically arranged on the surface of the end disc to form a surface-mounted rotor; the magnetic poles of two adjacent permanent magnets are opposite and are symmetrical about the center of the rotating shaft. The structure replaces the traditional N-S symmetrical arrangement mode of magnetic poles, the permanent magnets are replaced by magnetic resistances, the cost is reduced, the magnetic circuits are similar and symmetrical, the magnetic resistance torque generated by the magnetic resistances is fully utilized, the torque density is obviously improved under the unit permanent magnet consumption, the magnetic resistances and the permanent magnet mirror images correspond to enable the permanent magnet torque of the motor and the maximum value of a magnetic resistance rotor to be superposed at the same current phase angle, the superposition utilization of the permanent magnet torque and the magnetic resistance torque is realized, and the torque density of the motor is improved.
Description
Technical Field
The application belongs to the technical field of motors, and particularly relates to a low-cost axial permanent magnet motor and a control system thereof.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In recent years, with the widespread use of rare earth permanent magnet materials in electric machines, electromagnets in electrically excited synchronous machines have been gradually replaced with permanent magnet materials. Compared with the traditional induction motor, the permanent magnet synchronous motor has the advantages of small volume, light weight, high power density, large torque density, high power factor, high efficiency and the like.
As one of the permanent magnet motors, the axial permanent magnet motor is also called a disk permanent magnet motor, and has attracted more and more attention due to its advantages of compact structure, high efficiency, high power density, and the like. In recent years, the topology of axial permanent magnet motors has been extensively studied to improve torque density, most of which has focused on five parts: stator/rotor combination, rotor core, PM arrangement, stator core and coil layout. Compared with a radial magnetic motor, the axial magnetic flux motor has higher diameter-to-length ratio (compactness) and torque-to-weight ratio (torque density), so that the axial magnetic flux motor has wide application prospect. However, axial field permanent magnet synchronous motors have not been effectively developed due to limitations in motor manufacturing processes, permanent magnet material properties, winding configuration techniques, drive capacity, and the like.
Disclosure of Invention
In order to solve the problems, the application provides a low-cost axial permanent magnet motor and a control system thereof, which not only have lower cost, but also have higher torque density and operation efficiency, so that the motor is suitable for operation conditions.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
in a first aspect, an embodiment of the present application provides a low-cost axial permanent magnet motor, including: the rotor comprises a rotating shaft, two rotors arranged on the rotating shaft and a stator positioned between the two rotors; the rotor comprises an end disc, a permanent magnet and a magnetic resistance, wherein the permanent magnet and the magnetic resistance have the same structure and size and are symmetrically arranged on the surface of the end disc to form a surface-mounted rotor; the magnetic poles of two adjacent permanent magnets are opposite and are symmetrical about the center of the rotating shaft.
As an optional implementation mode, the permanent magnet is of a double-sine structure and is formed by cutting double-sine unequal amplitude values, and the magnetic resistance structurally corresponds to the permanent magnet;
alternatively, the magnetic resistance is made of a material with the same or almost the same density as the permanent magnet.
As an alternative embodiment, the stator includes a stator core and a stator winding, and the stator winding is a two-phase winding and is uniformly wound along a direction perpendicular to the circumference of the stator core.
As an alternative embodiment, the stator core is a hollow core in the shape of a circular sleeve, and does not include stator teeth or their corresponding slots.
As an alternative, the stator core is axially laminated from a soft magnetic composite material.
As an alternative, a plurality of flat coils are spatially oriented around the stator, with four concentrated windings corresponding to the two-phase windings and surrounding the stator core.
As an alternative, the two-phase windings are symmetrically arranged in 180 degrees in space, and one phase leads the other phase by 90 degrees on the electromagnetic phase, so as to form the electromagnetic phase relation of the motor.
As an alternative embodiment, the rotor further comprises a rotor sheath, the rotor sheath is tightly attached to the surface of the end disc and is in close contact with the permanent magnet and the magnetic resistance, and the outer diameter of the rotor sheath is the same as that of the end disc.
As an alternative embodiment, the rotor comprises an N-pole permanent magnet reluctance auxiliary rotor and an S-pole permanent magnet reluctance auxiliary rotor; and the length of an air gap between the N-pole permanent magnet reluctance auxiliary rotor and the stator is equal to that of an air gap between the S-pole permanent magnet reluctance auxiliary rotor and the stator.
In a second aspect, an embodiment of the present application further provides a control system of a low-cost axial permanent magnet motor, including the low-cost axial permanent magnet motor according to the first aspect and any optional implementation manner of the first aspect, and a two-phase connection controller, where the two-phase connection controller is used to implement electromechanical energy ac/dc conversion and control a stator winding of the low-cost axial permanent magnet motor, and the two-phase connection controller is a two-phase six-switch bridge circuit.
The beneficial effect of this application is:
(1) the application provides a low-cost axial permanent-magnet machine, its structure has replaced traditional magnetic pole N-S symmetrical arrangement mode, replace the magnetic resistance for the permanent magnet, reduce cost, similar symmetry on the magnetic circuit, make full use of the reluctance torque that the magnetic resistance produced, show promotion torque density under the unit permanent magnet quantity, magnetic resistance and permanent magnet mirror image correspond and make motor permanent-magnet torque and reluctance rotor maximum value can superpose in the same electric current phase angle department, permanent-magnet torque and reluctance torque' S stack utilization has been realized, thereby improve the torque density of motor.
(2) The permanent magnet and the magnetic resistance of the axial permanent magnet motor are optimally designed based on a sine curve, the permanent magnet adopts a double-sine structure, the outer sine curve is defined to be Asin theta, the inner sine curve is defined to be Bsin theta, and the magnetic pole area is as follows:
the magnetic pole is formed by cutting double sine unequal amplitude, the effective area of a magnetic line of a magnetic pole cut by a wire is changed in a sine mode all the time, the sine of a magnetic chain and back electromotive force is realized, the air gap field is distributed in a sine mode so as to reduce eddy current loss, air gap magnetic field harmonic waves, torque pulsation and vibration noise and improve the operation efficiency. Correspondingly, the magnetic resistance corresponds to the permanent magnet in structure, so that the axial magnetic pull force and the net axial force can be reduced, the magnetic resistance is made of a material with the density similar to that of the permanent magnet, the running rotational inertia of the rotor can be balanced, and the radial force is reduced.
The double-sine structure permanent magnet-reluctance structure is designed for processing convenience and reduces cost, the permanent magnets correspond to the reluctance, the formed rotor magnetic circuits are similar and symmetrical, the reluctance rotor is introduced to relatively reduce motor torque pulsation, and the torque which can be output by the permanent magnet in unit volume is improved.
(3) The stator winding of the axial flux permanent magnet motor adopts two-phase windings, the two-phase windings are wound in a concentrated mode, flat copper wires with rectangular cross sections are adopted, the effective area of a lead and an air gap is increased, the end portion of the stator winding is short, copper loss is low, the structure is simple, and air gap magnetic field modulation is more concise and ideal.
(4) The stator winding of the axial flux permanent magnet motor is controlled by adopting a two-phase connection controller, the switches connected and controlled by the three-phase winding need to be simultaneously and cooperatively controlled, and a third phase independent switch shared by the two-phase connection controller windings can be independently controlled and is not interfered by the previous two-phase switch. Under the condition that the wire resistance of the integral winding is not changed, rated current I is distributed to each phase of the three-phase winding, rated current 1.5I is distributed to each phase of the two-phase winding correspondingly, and the three-phase concentrated winding and the two-phase concentrated winding generate the same average torque. In addition, the switching tube operating power requirement of the three-phase six-switch bridge is as follows:
and the switching tube power requirements of the two-phase six-switch bridge are as follows:
two-phase controllers have lower requirements on power devices.
(5) The stator of the axial permanent magnet motor adopts a hollow stator, so that the use of stator materials is reduced, the cogging torque can be eliminated, the axial magnetic force is reduced, and the loss of a stator core is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is an exploded view of a low cost axial permanent magnet machine according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a stator structure and a winding phase distribution provided in an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a stator 1/2 provided in accordance with an embodiment of the present application;
FIG. 4 is a schematic diagram of a stator control circuit topology provided by an embodiment of the present application;
fig. 5 is a schematic structural diagram of an N-pole permanent magnet reluctance auxiliary rotor according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an S-pole permanent magnet reluctance auxiliary rotor according to an embodiment of the present application.
Reference numerals: 1. an S-pole permanent magnet reluctance auxiliary rotor; 1-1, S pole double sine structure permanent magnet; 1-2, S pole double sine structure magnetic resistance; 1-3, an S pole permanent magnet reluctance auxiliary rotor end disc; 1-4, an S pole permanent magnet reluctance auxiliary rotor sheath; 2. an N-pole permanent magnet reluctance auxiliary rotor; 2-1, N pole double sine structure permanent magnet; 2-2, N pole double sine structure magnetic resistance; 2-3, an N-pole permanent magnet reluctance auxiliary rotor end disc; 2-4, an N-pole permanent magnet reluctance auxiliary rotor sheath; 3. a stator; 3-1, a stator core; 3-2, stator winding; 4. a rotating shaft.
Detailed Description
The present application will be further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Based on this, the application provides a low-cost axial permanent-magnet machine, not only the cost is lower but also has higher operating efficiency and torque density, is applicable to various operating condition.
Referring to fig. 1, fig. 1 is an exploded schematic view of a low-cost axial permanent magnet motor according to an embodiment of the present invention, and as shown in fig. 1, the low-cost axial permanent magnet motor includes: a rotating shaft 4, two rotors arranged on the rotating shaft 4 and a stator 3 positioned between the two rotors; the rotor comprises an end disc, a permanent magnet and a magnetic resistance, wherein the permanent magnet and the magnetic resistance have the same structure and size and are symmetrically arranged on the surface of the end disc to form a surface-mounted rotor; the magnetic poles of two adjacent permanent magnets are opposite and are symmetrical about the center of the rotating shaft.
In specific implementation, the two rotors are an S-pole permanent magnet reluctance auxiliary rotor 1 and an N-pole permanent magnet reluctance auxiliary rotor 2, respectively, and the stator 3 is located between the S-pole permanent magnet reluctance auxiliary rotor 1 and the N-pole permanent magnet reluctance auxiliary rotor 2. The rotor is an axial double-layer structure and comprises a rotating shaft 4 and rotor end discs 1-3 and 2-3 fixed on the rotating shaft, wherein the permanent magnets and the magnetic resistance have the same structure and size and are symmetrically arranged on the surface of the end disc to form a surface-mounted rotor; the magnetic poles of two adjacent permanent magnets are opposite and are symmetrical about the center of the rotating shaft.
This application is through replacing the magnetic resistance with the permanent magnet, the cost is reduced, similar symmetry on the magnetic circuit simultaneously, make full use of the reluctance torque that the magnetic resistance produced, showing under the unit permanent magnet quantity and promoting torque density, magnetic resistance and permanent magnet mirror image correspond and make motor permanent magnet torque and reluctance rotor maximum value can superpose in the same electric current phase place department, have realized permanent magnet torque and reluctance torque's stack utilization to the torque density of motor has been improved.
In the embodiment of the present application, as an optional embodiment, the permanent magnet has a double-sine structure, and the magnetic resistance structurally corresponds to the permanent magnet;
alternatively, the magnetic resistance is made of a material with the same or almost the same density as the permanent magnet.
In specific implementation, the permanent magnet adopts a double-sine structure, an outer sine curve is defined as Asin theta, an inner sine curve is defined as Bsin theta, and the magnetic pole area is as follows:
magneto-resistance structurally related to permanent magnetThe body corresponds, and the cutting of the amplitude that varies by the double sine forms, the effective area of wire cutting magnetic pole magnetic line of force sinusoidal change all the time realizes the sinusoidal of magnetic chain and back electromotive force, and sinusoidal air gap field distributes in order to reduce eddy current loss, reduces air gap field harmonic, reduces torque ripple and vibration noise, improves the operating efficiency. As shown in fig. 2 and 3, the S-pole double-sine-structure permanent magnet 1-1, the S-pole double-sine-structure magnetic resistance 1-2, the N-pole double-sine-structure permanent magnet 2-1, and the N-pole double-sine-structure magnetic resistance 2-2 adopt a sine design based on a double-sine structure, and are closely attached to the surfaces of the corresponding S-pole permanent magnet reluctance auxiliary rotor end disc 1-3 and the N-pole permanent magnet reluctance auxiliary rotor end disc 2-3, the S-pole double-sine-structure permanent magnet 1-1 is mirror-symmetric with respect to the N-pole double-sine-structure magnetic resistance 2-2, and the N-pole double-sine-structure permanent magnet 2-1 is mirror-symmetric with respect to the S-pole double-sine-structure magnetic resistance 1-2.
In the embodiment of the present application, as an optional embodiment, the stator includes a stator core and a stator winding, where the stator winding is a two-phase winding and is uniformly wound along a vertical direction of a circumference of the stator core; optionally, the stator core is a hollow core in a shape of a circular sleeve, and does not include stator teeth or corresponding slots thereof. Optionally, the stator core is formed by axially laminating soft magnetic composite materials; optionally, as an alternative embodiment, the plurality of flat coils are spatially oriented around the stator, and the four concentrated windings correspond to the two-phase windings and surround the stator core.
In a specific implementation, as shown in fig. 4 and 5, the stator 3 comprises a hollow stator core 3-1 and a stator two-phase winding 3-2, and the stator core 3-1 adopts a slotless stator structure and is formed by axially laminating soft magnetic composite materials. The stator winding 3-2 is a two-phase winding, and is uniformly wound on the stator core 3-1 along the vertical direction of the circumference of the stator core 3-1 by using a flat winding. In the figure, "+" represents the direction of incoming wire for each phase winding, "-" represents the direction of outgoing wire for each phase winding, and A, B represents two phases of the stator winding 3-2, respectively, each separated by 90 ° mechanical angle. The distribution pattern within each phase of the stator winding 3-2 may vary and the distribution of the windings of each phase is used here for illustration only.
The stator core is a circular ring sleeve cylindrical hollow core and does not comprise stator teeth or corresponding slots, namely, a slotless stator structure, so that cogging torque can be eliminated, and vibration noise is effectively reduced; the stator winding adopts two-phase winding, and two-phase winding concentrates the wire winding, adopts the flat copper line of rectangle cross section, can increase the effective area of wire and air gap, and air gap magnetic field modulation is more ideal. The stator winding adopts flat winding to make the tip less, easily makes and the coiling and have good heat dispersion, in addition, still has higher rigidity, reduces motor winding's vibration noise to promote motor wholeness ability. Optionally, the two-phase windings are symmetrically arranged in 180 degrees in space to form an electromagnetic phase relationship of the motor.
In the embodiment of the present application, as an optional embodiment, the rotor further includes a rotor sheath, the rotor sheath is tightly attached to the surface of the end disc and is in close contact with the permanent magnet and the magnetic resistance, and the outer diameter of the rotor sheath is the same as that of the end disc.
In specific implementation, an S-pole double-sine-structure permanent magnet 1-1, an S-pole double-sine-structure magnetic resistance 1-2, an N-pole double-sine-structure permanent magnet 2-1 and an N-pole double-sine-structure magnetic resistance 2-2 are respectively fixed on a corresponding S-pole permanent magnet magnetic resistance auxiliary rotor sheath 1-4 and an N-pole permanent magnet magnetic resistance auxiliary rotor sheath 2-4 and are tightly attached to the surfaces of a corresponding S-pole permanent magnet magnetic resistance auxiliary rotor end disc 1-3 and an N-pole permanent magnet magnetic resistance auxiliary rotor end disc 2-3, the S-pole double-sine-structure permanent magnet 1-1 is mirror-symmetric with respect to the N-pole double-sine-structure magnetic resistance 2-2, and the N-pole double-sine-structure permanent magnet 2-1 is mirror-symmetric with respect to the S-pole double-sine-structure magnetic resistance 1-2.
The rotor sheath is arranged on the residual space on the surface of the rotor except the permanent magnet with the optimally designed shape, the structure is compact, and the effective air gap length of the motor is not influenced.
In the embodiment of the present application, as an optional embodiment, the rotor includes an N-pole permanent magnet reluctance auxiliary rotor and an S-pole permanent magnet reluctance auxiliary rotor; and the length of an air gap between the N-pole permanent magnet reluctance auxiliary rotor and the stator is equal to that of an air gap between the S-pole permanent magnet reluctance auxiliary rotor and the stator.
The technical scheme has the advantages that the permanent magnet is formed by cutting double-sine unequal amplitude, the effective area of the magnetic line of the wire-cut magnetic pole is changed in a sine mode all the time, the sine of a magnetic chain and back electromotive force is realized by the double-sine structure, air gap magnetic field harmonic waves are reduced, torque pulsation and vibration noise are reduced, and the operation efficiency is improved. The magnetic resistance is designed to be of a double-sine structure, the permanent magnet structurally corresponds to the double-sine structure, the axial magnetic tension and the net axial force are reduced, the magnetic resistance is made of a material with the density similar to that of the permanent magnet, the running rotational inertia of the rotor is balanced, and the radial force is reduced. The permanent magnet is replaced by the magnetic resistance, the cost is reduced, the magnetic circuits are similar and symmetrical, the magnetic resistance torque generated by the magnetic resistance is fully utilized, the torque density is obviously improved under the unit permanent magnet consumption, the magnetic resistance and the permanent magnet mirror image correspond to enable the motor permanent magnet torque and the maximum value of the magnetic resistance rotor to be superposed at the same current phase angle, and the superposition utilization of the permanent magnet torque and the magnetic resistance torque is realized.
The axial magnetic flux structure is adopted, so that the axial effective air gap length is adjustable, the permanent magnet protective sleeve is not influenced, the size is compact, and the heat dissipation performance is excellent; the stator adopts a slotless hollow stator structure to eliminate the cogging torque, reduce the vibration noise and increase the power density; the stator winding improves the heat radiation performance and efficiency by using a flat wire winding technology; the rotor permanent magnet and the magnetic resistance realize the sine of magnetic linkage and back electromotive force through shape optimization design, so that the motor has the advantages of low harmonic distortion, low vibration noise, high efficiency and the like.
The embodiment of the application further provides a control system of the low-cost axial permanent magnet motor, which comprises the low-cost axial permanent magnet motor and the two-phase connection controller, wherein the two-phase connection controller is used for realizing electromechanical energy alternating current-direct current conversion and controlling a stator winding of the low-cost axial permanent magnet motor, and the two-phase connection controller is a two-phase six-switch bridge circuit.
In an implementation, an important advantage of a two-phase connection controller is that the requirements on the driving circuit are lower. The switches controlled by the three-phase winding connection need to be controlled simultaneously and cooperatively, and a third-phase independent switch shared by the two-phase connected controller windings can be controlled independently and is not interfered by the previous two-phase switch. Under the condition that the resistance of the whole lead is not changed, each phase in the three-phase winding is distributed with a rated current I, each phase in the two-phase winding is correspondingly distributed with a rated current of 1.5I, and three phases and two phasesThe phase concentrated windings produce the same average torque. In addition, the switching tube operating power requirement of the three-phase six-switch bridge is as follows:
and the switching tube power requirements of the two-phase six-switch bridge are as follows:
two-phase controllers have lower requirements on power devices. Here, the topological schematic diagram of the stator control circuit is shown in fig. 6, and the two-phase connection controller is a two-phase six-switch bridge circuit which is used for realizing electromechanical energy alternating current-direct current conversion and controlling the stator winding of the low-cost axial permanent magnet motor.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A low cost axial permanent magnet machine, comprising: the rotor comprises a rotating shaft, two rotors arranged on the rotating shaft and a stator positioned between the two rotors; the rotor comprises an end disc, a permanent magnet and a magnetic resistance, wherein the permanent magnet and the magnetic resistance have the same structure and size and are symmetrically arranged on the surface of the end disc to form a surface-mounted rotor; the magnetic poles of two adjacent permanent magnets are opposite and are symmetrical about the center of the rotating shaft.
2. The low cost axial permanent magnet machine of claim 1, wherein said permanent magnets are of a double sinusoidal configuration with magnetic reluctance structurally corresponding to said permanent magnets;
alternatively, the magnetic resistance is made of a material with the same or almost the same density as the permanent magnet.
3. The low cost axial permanent magnet machine of claim 1, wherein said stator comprises a stator core and a stator winding, said stator winding being a two phase winding wound uniformly in a direction perpendicular to the circumference of said stator core.
4. A low cost axial permanent magnet machine according to claim 3, characterized in that said stator core is a toroidal sleeve shaped hollow core without stator teeth or their corresponding slots.
5. The low cost axial permanent magnet machine of claim 4, wherein said stator core is axially laminated from a soft magnetic composite material.
6. The low cost axial permanent magnet machine of claim 3, wherein the plurality of pancake coils are spatially oriented around the stator with four concentrated windings corresponding to two phase windings and surrounding the stator core.
7. The low-cost axial permanent magnet machine of claim 3, wherein the two phase windings are spatially arranged 180 degrees symmetrically, with one phase leading the other by 90 degrees, to form the electromagnetic phase relationship of the machine.
8. The low cost axial permanent magnet machine of claim 1, wherein said rotor further comprises a rotor sheath abutting the surface of the end disk and in intimate contact with the permanent magnets and the reluctance and having an outer diameter the same as the end disk.
9. The low cost axial permanent magnet machine of claim 1, wherein said rotor comprises an N pole permanent magnet reluctance auxiliary rotor and an S pole permanent magnet reluctance auxiliary rotor; and the length of an air gap between the N-pole permanent magnet reluctance auxiliary rotor and the stator is equal to that of an air gap between the S-pole permanent magnet reluctance auxiliary rotor and the stator.
10. A control system for a low cost axial permanent magnet machine, comprising a low cost axial permanent magnet machine according to any of claims 1-9 and a two-phase connection controller for performing electromechanical energy ac/dc conversion to control the stator windings of the low cost axial permanent magnet machine, the two-phase connection controller being a two-phase six-switch bridge circuit.
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| CN202210535717.0A CN114825725B (en) | 2022-05-17 | 2022-05-17 | Low-cost axial permanent magnet motor and control system thereof |
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| CN202210535717.0A CN114825725B (en) | 2022-05-17 | 2022-05-17 | Low-cost axial permanent magnet motor and control system thereof |
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| DE102020112423A1 (en) * | 2020-05-07 | 2021-11-11 | PohlBock Gmbh & Co KG | ROTOR FOR AN AXIAL FLOW ELECTRIC MOTOR, AXIAL FLOW ELECTRIC MOTOR WITH SUCH ROTOR, AND METHOD OF MANUFACTURING A ROTOR FOR A ROTATING ELECTRICAL MACHINE |
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