CN212627354U - Single-stator double-rotor axial flux mixed stator permanent magnet counter-rotating motor - Google Patents
Single-stator double-rotor axial flux mixed stator permanent magnet counter-rotating motor Download PDFInfo
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- CN212627354U CN212627354U CN202021538210.3U CN202021538210U CN212627354U CN 212627354 U CN212627354 U CN 212627354U CN 202021538210 U CN202021538210 U CN 202021538210U CN 212627354 U CN212627354 U CN 212627354U
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Abstract
The utility model provides a mixed stator permanent magnetism counter-rotating motor of single stator birotor axial magnetic flux relates to motor technical field. The counter-rotating electric machine includes: a disc stator and two disc rotors; one side of the disc rotor close to the disc stator is provided with a rotor salient pole; stator windings are wound on the disc type stator, and the current phase sequences of the stator windings on the two sides of the disc type stator are opposite; the first side of disk stator is provided with mixed permanent magnet group, and the second side is provided with high coercivity permanent magnet group, and mixed permanent magnet group includes: the permanent magnet with the low coercive force is wound with a magnetism regulating winding. The utility model discloses in, exert the controllable direct current vector pulse of amplitude size and direction in the accent magnetic winding, change the intensity of magnetization of low coercive force permanent magnet to adjust the air gap magnetic field of the first side of disk stator, realize different torque output under the disk rotor of disk stator both sides with the rotational speed, adapt to the demand of asymmetric load operating mode.
Description
Technical Field
The utility model relates to the technical field of electric machines, concretely relates to mixed stator permanent magnetism counter-rotating motor of single stator birotor axial magnetic flux.
Background
The contra-rotating motor is provided with a single-input electric port and two independent-output mechanical ports, can be applied to a contra-rotating propeller propulsion system, is a key component for ensuring stable propulsion of an underwater vehicle and stable flight of an airplane, and is widely applied to the fields of ocean exploration and aerospace. The counter-rotating motor driving system has the advantages of compact structure, small volume, light weight and the like, has more development potential, and researchers at home and abroad pay more and more attention to the counter-rotating motor in recent years.
There are two main types of counter-rotating electric machines currently developed: a stator and rotor counter-rotating motor and a single-stator and double-rotor counter-rotating motor. The stator and the rotor are fixed on the shell through the bearing by the counter-rotating motor, the stator and the rotor can rotate relative to the shell, and the rotating directions are opposite. The stator power supply is introduced by the electric brush and the slip ring, the complexity of the mechanical structure is increased, the reliability of the system is reduced, and the application and popularization of the motor are severely restricted; and it is difficult to ensure that the rotational speeds of the rotors are the same when the loads are asymmetrical, which can seriously affect the propulsion efficiency when used in a contra-rotating propeller system. The single-stator double-rotor counter-rotating motor usually adopts an alternating-current permanent magnet form and is composed of a stator and two rotors, the two rotors are mechanically independent, a stator winding can generate two magnetic fields rotating in different directions through special design, and the two magnetic fields are controlled by an inverter to realize the rotation in different directions of the double rotors. The motor does not need devices such as electric brushes, commutators and the like, is convenient to maintain and is more reliable to operate. Compared with a stator and rotor counter-rotating motor, the brushless single-stator and double-rotor permanent magnet counter-rotating motor has better application and popularization values.
However, the single-stator dual-rotor counter-rotating motor adopts one inverter to drive two permanent magnet rotors simultaneously, because the air gap field of the permanent magnet motor is not adjustable, when the load is asymmetric or the load is suddenly changed, the current change caused by the torque adjustment of one rotor inevitably causes the torque change of the other rotor, the two opposite torques are related and coupled with each other, and when the load is asymmetric or the load of one rotor is suddenly changed, the traditional control technology is difficult to realize the 'compromise' control of the two rotor torques.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides a mixed stator permanent magnetism to rotating electrical machines of single stator birotor axial magnetic flux has solved the problem that single stator birotor to rotating electrical machines is difficult to adapt to asymmetric load.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a single-stator, dual-rotor, axial flux hybrid stator permanent magnet counter-rotating machine, comprising: a disc stator and two disc rotors;
the two disc rotors are respectively positioned on two sides of the disc stator, and one side of each disc rotor, which is close to the disc stator, is provided with a rotor salient pole;
stator windings are wound on the disc type stator, and the current phase sequences of the stator windings on the two sides of the disc type stator are opposite; the both sides of disk stator are provided with the permanent magnet, and wherein, disk stator's first side is provided with mixed permanent magnet group, and the second side is provided with high coercivity permanent magnet group, mixed permanent magnet group includes: the permanent magnet comprises a first high-coercivity permanent magnet and a low-coercivity permanent magnet, wherein the low-coercivity permanent magnet is wound with a magnetism regulating winding.
Preferably, the rotor salient poles are arranged at intervals in a radial mode, the stator salient poles are arranged on two sides of the disc type stator at intervals in a radial mode, and stator slots are formed between the stator salient poles.
Preferably, the permanent magnets are embedded in the spaced stator slots, and the stator slots on the first side of the disc stator include: the inner groove is close to the axis of the disc stator, and the outer groove is far away from the axis of the disc stator.
Preferably, the high coercive force permanent magnet group comprises a plurality of second high coercive force permanent magnets, and the inner groove and the outer groove are respectively embedded with a first high coercive force permanent magnet and a low coercive force permanent magnet; the second high-coercivity permanent magnet is embedded in stator slots spaced on the second side of the disc stator.
Preferably, a magnetic isolation plate is arranged in the middle of the disc type stator and is perpendicular to the axis of the disc type stator.
Preferably, a magnetic shielding arc plate is arranged between the first high-coercivity permanent magnet and the low-coercivity permanent magnet and is positioned between the inner groove and the outer groove.
Preferably, the stator winding is a bilateral reversed-phase-sequence parallel fan-shaped three-phase winding; the stator windings on two sides of the disc type stator are of a double-layer centralized structure and comprise a plurality of winding coils, each centralized winding coil is embedded in an interval stator slot, and the stator slots in which the winding coils are embedded and the stator slots in which the permanent magnets are embedded are arranged in a staggered mode; the winding coil is in a fan shape; three-phase winding coils are sequentially arranged, and a plurality of winding coils of the same phase are connected in series at the end part; stator windings on two sides of the disc type stator are arranged in an inverted phase sequence and are connected in parallel to form a set of windings.
Preferably, the stator winding is a three-phase crossed annular winding, and the stator winding includes: the phase-A winding, the phase-B winding and the phase-C winding are arranged in parallel; the A-phase winding, the B-phase winding and the C-phase winding are wound in stator slots of the disc stator, and the stator slots wound with the stator windings and the stator slots embedded with the permanent magnets are arranged in a staggered mode; and at the inner wall and the outer wall of the ring of the disc stator, the B-phase winding is crossed with the A-phase winding, and the C-phase winding is simultaneously crossed with the A-phase winding and the B-phase winding.
Preferably, the first high coercive force permanent magnet, the low coercive force permanent magnet and the second high coercive force permanent magnet are each twelve in number.
Preferably, the disc stator is fixed in the casing, the disc rotor is rotatably connected with the casing through a bearing, the disc rotors on two sides of the disc stator are respectively and fixedly connected with an outer shaft and an inner shaft of the nested mechanical shaft, and the other ends of the inner shaft and the outer shaft are respectively connected with the two contra-rotating propellers.
(III) advantageous effects
The utility model provides a mixed stator permanent-magnet contra-rotating motor of single-stator birotor axial magnetic flux. Compared with the prior art, the method has the following beneficial effects:
the utility model discloses in, counter-rotating motor includes: a disc stator and two disc rotors; the two disc rotors are respectively positioned at two sides of the disc stator, and one side of the disc rotor close to the disc stator is provided with a rotor salient pole; stator windings are wound on the disc type stator, and the current phase sequences of the stator windings on the two sides of the disc type stator are opposite; the both sides of disk stator are provided with the permanent magnet, and wherein, the first side of disk stator is provided with mixed permanent magnet group, and the second side is provided with high coercivity permanent magnet group, and mixed permanent magnet group includes: the permanent magnet with the low coercive force is wound with a magnetism regulating winding; the direct current vector pulse with controllable amplitude and direction is applied in the magnetic regulating winding to change the magnetization intensity of the low-coercivity permanent magnet, so that the air gap magnetic field on the first side of the disc stator is regulated, different torque outputs of the disc rotors on the two sides of the disc stator at the same rotating speed are realized, and the requirements of asymmetric load working conditions are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an application environment structure of a counter-rotating motor according to an embodiment of the present invention;
fig. 2 is a left side assembly perspective view of the counter-rotating motor in embodiment 1 of the present invention;
fig. 3 is a right-view assembly axonometric view of the counter-rotating motor in embodiment 1 of the present invention;
fig. 4 is a left side assembly perspective view of the counter-rotating motor in embodiment 2 of the present invention;
fig. 5 is an assembly axonometric view of the contra-rotating electric machine in embodiment 2 of the utility model.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the application solves the problem that the single-stator dual-rotor counter-rotating motor is difficult to adapt to asymmetric loads by providing the single-stator dual-rotor axial magnetic flux mixed stator permanent magnet counter-rotating motor.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
in an embodiment of the present invention, the counter-rotating motor includes: a disc stator and two disc rotors; the two disc rotors are respectively positioned at two sides of the disc stator, and one side of the disc rotor close to the disc stator is provided with a rotor salient pole; stator windings are wound on the disc type stator, and the current phase sequences of the stator windings on the two sides of the disc type stator are opposite; the both sides of disk stator are provided with the permanent magnet, and wherein, the first side of disk stator is provided with mixed permanent magnet group, and the second side is provided with high coercivity permanent magnet group, and mixed permanent magnet group includes: the permanent magnet with the low coercive force is wound with a magnetism regulating winding; the direct current vector pulse with controllable amplitude and direction is applied in the magnetic regulating winding to change the magnetization intensity of the low-coercivity permanent magnet, so that the air gap magnetic field on the first side of the disc stator is regulated, different torque outputs of the disc rotors on the two sides of the disc stator at the same rotating speed are realized, and the requirements of asymmetric load working conditions are met.
On the other hand, the disc rotor is not provided with a winding or a permanent magnet, the running reliability is high, compared with a counter-rotating motor with the permanent magnet arranged on the rotor, the permanent magnet does not need to vibrate along with the rotor, and the magnetic loss risk of the permanent magnet is greatly reduced.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1:
as shown in fig. 1-3, the utility model provides a mixed stator permanent magnetism to counter-rotating motor of single stator birotor axial magnetic flux, to counter-rotating motor includes: a disc stator 10 and two disc rotors 20;
two disc rotors 20 are respectively positioned at two sides of the disc stator 10, and one side of the disc rotor 20 close to the disc stator 10 is provided with a rotor salient pole 21;
a stator winding 11 is wound on the disc stator 10, and the current phase sequences of the stator winding 11 at two sides of the disc stator 10 are opposite; the both sides of disk stator 10 are provided with the permanent magnet, and wherein, the first side of disk stator 10 is provided with mixed permanent magnet group, and the second side is provided with high coercivity permanent magnet group, mixed permanent magnet group includes: the permanent magnet with the low coercive force comprises a first permanent magnet with the high coercive force 30 (such as neodymium iron boron) and a permanent magnet with the low coercive force 40 (such as alnico), wherein a magnetism regulating winding 41 is wound on the permanent magnet with the low coercive force 40, and the magnetism regulating windings 41 are mutually connected in series. The magnetic regulating winding 41 is internally applied with direct current vector pulses with controllable amplitude and direction, and the magnetization intensity of the low-coercivity permanent magnet 40 is changed, so that the air gap magnetic field at the first side of the disc stator 10 is regulated, different torque outputs of the disc rotors 20 at the two sides of the disc stator 10 at different rotating speeds are realized, and the requirements of asymmetric load working conditions are met.
On the other hand, the disc rotor 20 has no winding or permanent magnet, the operation reliability is high, compared with a counter-rotating motor with the permanent magnet arranged on the rotor, the permanent magnet does not need to vibrate along with the rotor, and the magnetic loss risk of the permanent magnet is greatly reduced.
As shown in fig. 2 and 3, the rotor salient poles 21 are radially arranged at intervals, and the rotor salient poles 21 are made of a magnetic conductive material (e.g., iron).
As shown in fig. 2 and 3, stator salient poles 12 are provided on both sides of the disk stator 10, the stator salient poles 12 are radially spaced, and stator slots are formed between the stator salient poles 12.
As shown in fig. 2 and 3, the permanent magnets are embedded in the spaced stator slots, and the stator slots on the first side of the disc stator 10 include: an inner slot, which is close to the axis of the disc stator 10, and an outer slot, which is far from the axis of the disc stator 10.
As shown in fig. 2, 3, the high coercive force permanent magnet group includes a plurality of second high coercive force permanent magnets 50, the inner and outer slots embedding the first high coercive force permanent magnets 30 and the low coercive force permanent magnets 40, respectively; the second high coercivity permanent magnets 50 are embedded in the spaced stator slots on the second side of the disc stator 10.
As shown in fig. 2 and 3, a magnetic isolation plate 13 is disposed in the middle of the disc stator 10, and the magnetic isolation plate 13 is disposed perpendicular to the axis of the disc stator 10 to prevent magnetic fields at two sides of the disc stator 10 from affecting each other.
As shown in fig. 2 and 3, a magnetic barrier plate 14 is disposed between the first high coercive force permanent magnet 30 and the low coercive force permanent magnet 40, and the magnetic barrier plate 14 is located between the inner groove and the outer groove to prevent magnetic fields between the first high coercive force permanent magnet 30 and the low coercive force permanent magnet 40 from influencing each other.
As shown in fig. 2 and 3, the stator winding 11 is a double-sided reverse phase sequence parallel type sector three-phase winding; the stator windings 11 on both sides of the disc stator 10 are of a double-layer centralized structure, the stator windings 11 comprise a plurality of winding coils, each centralized winding coil is embedded in an interval stator slot, and the stator slots in which the winding coils are embedded and the stator slots in which the permanent magnets are embedded are arranged in a staggered manner; the winding coil is in a fan shape; three-phase winding coils are sequentially arranged, and a plurality of winding coils of the same phase are connected in series at the end part; stator windings 11 on both sides of the disk stator 10 are arranged in an inverted phase sequence and then connected in parallel to form a set of windings.
As shown in fig. 1, the disc stator 10 is fixed in a casing, the disc rotor 20 is rotatably connected with the casing through a bearing, the disc rotors 20 at two sides of the disc stator 10 are respectively fixedly connected with an outer shaft and an inner shaft of a nested mechanical shaft, and the other ends of the inner shaft and the outer shaft are respectively connected with two contra-rotating propellers.
As shown in fig. 3 and 4, the first high-coercive-force permanent magnet 30, the low-coercive-force permanent magnet 40, and the second high-coercive-force permanent magnet 50 are each twelve in number.
Example 2:
as shown in fig. 4 and 5, the stator winding 11 is a three-phase crossing loop winding, and the stator winding 11 includes: an a-phase winding 15, a B-phase winding 16, and a C-phase winding 17; the A-phase winding 15, the B-phase winding 16 and the C-phase winding 17 are wound in stator slots of the disc stator 10, and the stator slots wound with the stator winding 11 and the stator slots embedded with the permanent magnets are arranged in a staggered mode; at the inner and outer ring walls of the disc stator 10, the B-phase winding 16 crosses the a-phase winding 15, and the C-phase winding 17 crosses both the a-phase winding 15 and the B-phase winding 16.
The stator winding 11 is wound on the disc stator 10 in a three-phase winding two-phase crossing manner, so that current phase sequences of windings on two sides of the disc stator 10 are opposite, and a pair of equal and opposite rotating magnetic fields is generated on two sides of the disc stator 10.
To sum up, compare with prior art, the utility model discloses possess following beneficial effect:
1. in an embodiment of the present invention, the counter-rotating motor includes: a disc stator and two disc rotors; the two disc rotors are respectively positioned at two sides of the disc stator, and one side of the disc rotor close to the disc stator is provided with a rotor salient pole; stator windings are wound on the disc type stator, and the current phase sequences of the stator windings on the two sides of the disc type stator are opposite; the both sides of disk stator are provided with the permanent magnet, and wherein, the first side of disk stator is provided with mixed permanent magnet group, and the second side is provided with high coercivity permanent magnet group, and mixed permanent magnet group includes: the permanent magnet with the low coercive force is wound with a magnetism regulating winding; the direct current vector pulse with controllable amplitude and direction is applied in the magnetic regulating winding to change the magnetization intensity of the low-coercivity permanent magnet, so that the air gap magnetic field on the first side of the disc stator is regulated, different torque outputs of the disc rotors on the two sides of the disc stator at the same rotating speed are realized, and the requirements of asymmetric load working conditions are met.
2. The embodiment of the utility model provides an in, neither have the winding nor have the permanent magnet on the disk rotor, operational reliability is high, compares in the counter-rotating machine that the permanent magnet was installed on the rotor, and this application permanent magnet need not be along with rotor vibration, greatly reduced the magnetic loss risk of permanent magnet.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A single-stator dual-rotor axial flux hybrid stator permanent magnet counter-rotating machine, comprising: a disc stator (10) and two disc rotors (20);
the two disc rotors (20) are respectively positioned at two sides of the disc stator (10), and one side of each disc rotor (20) close to the disc stator (10) is provided with a rotor salient pole (21);
the disc-type stator (10) is wound with stator windings (11), and the current phase sequences of the stator windings (11) on two sides of the disc-type stator (10) are opposite; the both sides of disk stator (10) are provided with the permanent magnet, and wherein, the first side of disk stator (10) is provided with mixed permanent magnet group, and the second side is provided with high coercivity permanent magnet group, mixed permanent magnet group includes: the permanent magnet comprises a first high-coercivity permanent magnet (30) and a low-coercivity permanent magnet (40), wherein a magnetism regulating winding (41) is wound on the low-coercivity permanent magnet (40).
2. The single-stator dual-rotor axial flux hybrid stator permanent magnet counter-rotating machine according to claim 1, wherein the rotor salient poles (21) are radially spaced, the disc stator (10) is provided with stator salient poles (12) on both sides thereof, the stator salient poles (12) are radially spaced, and stator slots are formed between the stator salient poles (12).
3. The single stator dual rotor axial flux mixed stator pm machine of claim 2, wherein the permanent magnets are embedded in spaced stator slots, the stator slots on the first side of the disc stator (10) comprising: an inner slot close to the axis of the disc stator (10) and an outer slot remote from the axis of the disc stator (10).
4. The single-stator dual-rotor axial flux hybrid stator permanent magnet counter-rotating machine according to claim 3, wherein the high-coercivity permanent magnet set comprises a plurality of second high-coercivity permanent magnets (50), the inner and outer slots embedding the first high-coercivity permanent magnets (30) and the low-coercivity permanent magnets (40), respectively; the second high coercivity permanent magnet (50) is embedded in spaced stator slots on the second side of the disc stator (10).
5. The single-stator double-rotor axial flux mixed stator permanent magnet counter-rotating machine according to claim 4, characterized in that a magnetic isolation plate (13) is arranged in the middle of the disk stator (10), and the magnetic isolation plate (13) is arranged perpendicular to the axis of the disk stator (10).
6. The single-stator dual-rotor axial flux hybrid stator permanent magnet counter-rotating machine according to claim 4, wherein a magnetic shield plate (14) is disposed between the first high-coercive force permanent magnet (30) and the low-coercive force permanent magnet (40), the magnetic shield plate (14) being located between the inner and outer slots.
7. The single-stator dual-rotor axial flux hybrid stator permanent magnet counter-rotating machine according to claim 3, wherein the stator winding (11) is a double-sided reverse phase sequence parallel fan-shaped three-phase winding; the stator windings (11) on the two sides of the disc stator (10) are of a double-layer centralized structure, each stator winding (11) comprises a plurality of winding coils, each centralized winding coil is embedded in an interval stator slot, and the stator slots in which the winding coils are embedded and the stator slots in which the permanent magnets are embedded are arranged in a staggered mode; the winding coil is in a fan shape; three-phase winding coils are sequentially arranged, and a plurality of winding coils of the same phase are connected in series at the end part; stator windings (11) on two sides of the disc type stator (10) are arranged in an inverted phase sequence and are connected in parallel to form a set of windings.
8. The single-stator dual-rotor axial flux hybrid stator permanent magnet counter-rotating machine according to claim 3, wherein the stator winding (11) is a three-phase cross-wound ring winding, the stator winding (11) comprising: an A-phase winding (15), a B-phase winding (16) and a C-phase winding (17); the A-phase winding (15), the B-phase winding (16) and the C-phase winding (17) are wound in stator slots of the disc stator (10), and the stator slots wound with the stator winding (11) and the stator slots embedded with the permanent magnets are arranged in a staggered mode; the B-phase winding (16) is crossed with the A-phase winding (15) at the inner wall and the outer wall of the ring of the disc stator (10), and the C-phase winding (17) is simultaneously crossed with the A-phase winding (15) and the B-phase winding (16).
9. The single-stator, dual-rotor, axial flux hybrid stator permanent magnet counter-rotating machine of claim 4, wherein the first high-coercivity permanent magnet (30), the low-coercivity permanent magnet (40), and the second high-coercivity permanent magnet (50) are each twelve in number.
10. The single-stator double-rotor axial flux mixed stator permanent magnet counter-rotating motor according to any one of claims 1 to 9, wherein the disc stator (10) is fixed in a housing, the disc rotor (20) is rotatably connected with the housing through a bearing, the disc rotors (20) on two sides of the disc stator (10) are respectively fixedly connected with an outer shaft and an inner shaft of a nested mechanical shaft, and the other ends of the inner shaft and the outer shaft are respectively connected with two counter-rotating propellers.
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| CN202021538210.3U CN212627354U (en) | 2020-07-29 | 2020-07-29 | Single-stator double-rotor axial flux mixed stator permanent magnet counter-rotating motor |
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| CN202021538210.3U CN212627354U (en) | 2020-07-29 | 2020-07-29 | Single-stator double-rotor axial flux mixed stator permanent magnet counter-rotating motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113991957A (en) * | 2021-11-17 | 2022-01-28 | 长沙理工大学 | Single-phase double-magnetic-circuit permanent magnet motor and driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113991957A (en) * | 2021-11-17 | 2022-01-28 | 长沙理工大学 | Single-phase double-magnetic-circuit permanent magnet motor and driving method |
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