CN115765366A - Single-phase series axial permanent magnet synchronous fault-tolerant motor - Google Patents
Single-phase series axial permanent magnet synchronous fault-tolerant motor Download PDFInfo
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- CN115765366A CN115765366A CN202211609595.1A CN202211609595A CN115765366A CN 115765366 A CN115765366 A CN 115765366A CN 202211609595 A CN202211609595 A CN 202211609595A CN 115765366 A CN115765366 A CN 115765366A
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- 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
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a single-phase serial axial permanent magnet synchronous fault-tolerant motor, and relates to the technical field of motors. The motor comprises a shell, a rotating shaft penetrates through the shell, the two ends of the rotating shaft are located on the outer side of the shell, a bearing is arranged at the contact position of the rotating shaft and the shell, M +1 rotor modules are fixed on the rotating shaft, a stator module is arranged between every two adjacent rotor modules, the stator modules are fixedly connected with the shell, a winding on each stator module is a single-phase winding, the stator windings are mutually independent, each stator module and the adjacent rotor modules can be regarded as an independent unit motor, and when one stator module breaks down, the stator module is cut off and the operation of the whole motor is not influenced. The invention has the advantages of strong fault-tolerant capability, high modularization degree, low maintenance cost, small volume, simple structure, large power density, wide speed regulation range and the like.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a single-phase serial axial permanent magnet synchronous fault-tolerant motor.
Background
With the development of aviation industry, the proportion of carbon emission is continuously increased, which is estimated to reach about 15% in 2050, meanwhile, the weight of a motor and the complexity of a structure are increased by adopting various energy systems, the reliability of the airplane is reduced, and in order to relieve the global energy shortage pressure, the quality of the airplane is reduced, the cost of the airplane is saved, the safety of the airplane is improved, and the full-electric airplane is vigorously developed. The working environment of the full electric aircraft is complex, and the installation space of each system is limited, so that the motor is required to have high reliability, strong fault-tolerant capability and high torque density. Meanwhile, in order to meet various working conditions such as take-off, cruising and the like, the motor is required to have a wider speed regulation range.
The end windings of the traditional integral-slot three-phase motor are overlapped, so that the coupling between different phases is strong, the winding inductance is small, and the capacity of inhibiting short-circuit current is limited. Meanwhile, the integral-slot winding cannot adopt a modularized processing mode, and the fault-tolerant capability of the integral-slot three-phase motor is further reduced. The fractional slot concentrated winding three-phase motor has the advantages that the winding end parts are mutually independent, the winding end parts have large inductance, short-circuit current can be restrained, meanwhile, the weak magnetic capacity is good, the motor can operate in a wide rotating speed area, but the motor contains a large amount of magnetomotive force harmonic waves, and loss and vibration noise of the motor can be increased. Meanwhile, the radial flux motor has a larger axial size, the torque density of the motor is relatively low, and the efficiency of the motor is relatively low due to the fact that the end winding of the motor is long and the like.
Disclosure of Invention
The invention aims to solve the technical problem of how to provide a single-phase series axial permanent magnet synchronous fault-tolerant motor which has better speed regulation performance, strong fault-tolerant capability, large power density and large starting torque.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a synchronous fault-tolerant motor of single-phase series connection axial permanent magnetism which characterized in that: the motor comprises a shell, a rotating shaft penetrates through the shell, two ends of the rotating shaft are positioned on the outer side of the shell, a bearing is arranged at the contact position of the rotating shaft and the shell, M +1 rotor modules are fixed on the rotating shaft, a stator module is arranged between every two adjacent rotor modules, the stator modules are fixedly connected with the shell, windings on each stator module are single-phase windings, the stator windings are mutually independent, each stator module and the adjacent rotor modules can be regarded as an independent unit motor, magnetic fields between the unit motors are not coupled, the unit motors can independently run to generate torque, and when one stator module breaks down, the stator module is cut off to not affect the running of the whole motor; meanwhile, the phase difference of the current between the adjacent stator modules is 360 degrees/M of electrical angle, and the torques generated by all the unit motors are combined into a total output torque on the rotating shaft, so that the total output torque is smoother.
The further technical scheme is as follows: the rotor modules comprise end rotor modules and middle rotor modules, the two end rotor modules are respectively positioned at two ends of the rotating shaft, and the middle rotor module is positioned between the two end rotor modules.
The further technical scheme is as follows: the end rotor module comprises a single-face rotor disc, and a plurality of permanent magnets are uniformly spaced along the circumferential direction on the axial end face of the single-face rotor disc close to the inner side; the middle rotor module comprises a double-faced rotor disc, and a plurality of permanent magnets are uniformly spaced on two axial end faces of the double-faced rotor disc along the circumferential direction.
The further technical scheme is as follows: the yoke portion thickness of the double-sided rotor disk is at least twice the yoke portion thickness of the single-sided rotor disk.
The further technical scheme is as follows: the shell comprises a front end cover, a rear end cover and a shell, wherein the front end cover is connected to the front end of the shell, the rear end cover is connected to the rear end of the shell, and the bearings are fixed in mounting holes in the front end cover and the rear end cover respectively.
The further technical scheme is as follows: the stator module comprises a stator disc, a stator bracket and a winding, wherein the stator disc is processed by a soft magnetic composite material through a powder metallurgy method; the number of the stator supports is two, and cavities which are distributed along the circumferential direction and have the same shape as the boot parts of the stator modules are reserved on the end surfaces of the inner sides of the two stator supports and are fixed on the shell; the winding is correspondingly wound on the stator disc; the stator plate is embedded between the stator supports through the cavity to form a yoke-free segmented stator structure.
The further technical scheme is as follows: in one unit motor, magnetic flux forms a closed loop through an N pole on a single-sided rotor disc at one end, a stator disc, an S pole on one side of the double-sided rotor disc, a yoke of the double-sided rotor disc, an N pole on one side of the double-sided rotor disc, the stator disc, an S pole on the single-sided rotor disc and the yoke on the single-sided rotor disc, wherein the yoke of the double-sided rotor disc is a magnetic circuit shared by two adjacent unit motors.
The further technical scheme is as follows: and the windings of the M stator discs are wound in the stator module in a tooth winding manner.
The further technical scheme is as follows: the number of the stator slots and the number of the rotor poles of each unit motor of the single-phase serial axial permanent magnet synchronous fault-tolerant motor are equal and are even.
The further technical scheme is as follows: when M is more than or equal to 3, the drive control circuit of the single-phase serial axial permanent magnet synchronous fault-tolerant motor with M stator discs is the same as that of the M-phase motor; when M <3, the drive control circuit of the single-phase serial axial permanent magnet synchronous fault-tolerant motor with M stator discs 4-1 is formed by connecting two single-phase motor control circuits with 180-degree electrical angle difference in parallel.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the motor is more flexible in application, is more rapid and convenient to install due to the adoption of a modular design, and can freely select the number of the superposed stator discs according to different power requirements; each stator disc is composed of a single-phase motor, the stator discs are independent of each other, the fault-tolerant capability is good, and when one or more stator discs are in fault, the work of other stator discs is not influenced. After the fault occurs, the maintenance and the replacement of the fault module are also convenient, and the installation and maintenance cost is saved. The invention has better speed regulation performance, weak magnetic capacity, large power density of the motor, large starting torque and high efficiency.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic cross-sectional view of a fault tolerant motor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an explosion structure of a fault tolerant motor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a motor-magnet furnace of a fault tolerant motor according to an embodiment of the present invention;
wherein: 1. a rotating shaft; 2. a bearing; 3. a rotor module; 3-1, a single-sided rotor disk; 3-2, double-sided rotor disc; 3-3, permanent magnets; 4. a stator module; 4-1, stator disc; 4-2, stator support; 4-3, winding; 5. a front end cover; 6. a rear end cap; 7. a casing.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and it will be appreciated by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the present invention and that the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1-2, the embodiment of the invention discloses a single-phase serial axial permanent magnet synchronous fault-tolerant motor, which comprises a housing, wherein a rotating shaft 1 penetrates through the housing, and then two ends of the rotating shaft are positioned outside the housing; the pivot 1 with the contact department of shell is provided with bearing 2, and is further, the shell includes front end housing 5, rear end housing 6 and casing 7, front end housing 5 is connected the front end of casing 7, rear end housing 6 is connected the rear end of casing 7, bearing 2 is fixed respectively in the mounting hole on front end housing 5 and the rear end housing 6, the pivot can rotate under the support of pivot.
Further, as shown in fig. 1-2, M +1 rotor modules 3 are fixed on the rotating shaft 1, and a stator module 4 is disposed between two adjacent rotor modules 3. The stator modules 4 are fixedly connected with the shell, windings 4-3 on each stator module 4 are single-phase windings, the stator windings are independent from each other, each stator module 4 and the adjacent rotor module 3 can be regarded as an independent unit motor, magnetic fields between the unit motors are not coupled with each other, the unit motors can independently run to generate torque, and when one stator module 4 breaks down, the stator module is cut off, and the running of the whole motor is not influenced; meanwhile, the phase difference of the current between the adjacent stator modules 4 is 360 DEG/M electrical angle, and the torque generated by all the unit motors is combined into the total output torque on the rotating shaft 1, so that the total output torque is smoother.
Further, as shown in fig. 1-2, the rotor module 3 includes two end rotor modules and a middle rotor module, the two end rotor modules are respectively located at two ends of the rotating shaft 1, the middle rotor module is located between the two end rotor modules, the middle rotor modules are provided with a plurality of end rotor modules, corresponding setting can be performed according to requirements, and the stator module 4 is located between the end rotor modules and the middle rotor module or between the middle rotor modules and the middle rotor module.
Further, as shown in fig. 2 and 3, the end rotor module comprises a single-sided rotor disc 3-1, and a plurality of permanent magnets 3-3 uniformly spaced along the circumferential direction on the axial end face of the single-sided rotor disc 3-1 close to the inner side; the middle rotor module comprises a double-sided rotor disc 3-2, and a plurality of permanent magnets 3-1 are uniformly spaced on two axial end faces of the double-sided rotor disc 3-2 along the circumferential direction. Preferably, the permanent magnet 3-1 is fan-shaped, and the yoke thickness of the double-sided rotor disk 3-2 is at least twice as thick as the yoke thickness of the single-sided rotor disk 3-1.
Further, as shown in fig. 2 and 3, the stator module 4 includes a stator disc 4-1, a stator frame 4-2, and a winding 4-3. Wherein the stator disc 4-1 is obtained by processing a soft magnetic composite material by a powder metallurgy method; the number of the stator supports 4-2 is two, and cavities which are distributed along the circumferential direction and have the same shape as the boot parts of the stator modules are reserved on the end surfaces of the inner sides of the two stator supports 4-2 and are fixed on the shell; the winding 4-3 is correspondingly wound on the stator disc 4-1; the stator disc 4-1 is embedded between the stator supports 4-2 through a cavity to form a yoke-free segmented stator structure. The windings of the M stator discs 4-1 are wound in the stator module 4 in a tooth winding mode.
As shown in FIG. 3, in one unit motor, magnetic flux passes through an N pole on a single-sided rotor disk 3-1 at one end, a stator disk 4-1, an S pole on a double-sided rotor disk 3-2, a yoke part of the double-sided rotor disk 3-2, an N pole on the double-sided rotor disk 3-2, the stator disk 4-1, an S pole on the single-sided rotor disk 3-1 and a yoke part on the single-sided rotor disk 3-1 to form a closed loop, and the yoke part of the double-sided rotor disk 3-2 is a shared magnetic circuit of two adjacent unit motors. In addition, the number of the stator slots and the number of the rotor poles of each unit motor of the single-phase serial axial permanent magnet synchronous fault-tolerant motor are equal and are even.
In the application, when M is more than or equal to 3, the drive control circuit of the single-phase serial axial permanent magnet synchronous fault-tolerant motor with M stator discs 4-1 is the same as that of the M-phase motor; when M <3, the drive control circuit of the single-phase serial axial permanent magnet synchronous fault-tolerant motor with M stator discs 4-1 is formed by connecting two single-phase motor control circuits with an electric angle difference of 180 degrees in parallel.
The following are exemplary: when M =2, the machine consists of two single-sided rotor disks, one double-sided rotor disk and two stator disks, which differ by 180 ° in electrical angle. And the two unit motors adopt control circuits of single-phase motors, and when a fault occurs, a fault branch is cut off.
When M =3, the motor is composed of two single-sided rotor disks, two double-sided rotor disks and three stator disks, and the three stator disks respectively have a 120-degree electrical angle difference. The motor is controlled by a driving control circuit of a three-phase motor, and when a fault occurs, a fault branch is cut off.
By analogy, when 3,4,5, \ 8230and unit motors are connected in series, the corresponding 3,4,5, \ 8230and phase motor drive control circuits are respectively adopted for control.
In conclusion, the motor is more flexible in application, is more rapid and convenient to install due to the adoption of a modular design, and can freely select the number of the superposed stator discs according to different power requirements; each stator disc is composed of a single-phase motor, the stator discs are independent of each other, the fault-tolerant capability is good, and when one or more stator discs are in fault, the work of other stator discs is not influenced. After the fault occurs, the maintenance and the replacement of the fault module are also convenient, and the installation and maintenance cost is saved. The invention has better speed regulation performance, weak magnetic capacity, large power density of the motor, large starting torque and high efficiency.
Claims (10)
1. The utility model provides a synchronous fault-tolerant motor of single-phase series connection axial permanent magnetism which characterized in that: the motor comprises a shell, wherein a rotating shaft (1) penetrates through the shell, the two ends of the rotating shaft (1) are positioned on the outer side of the shell, a bearing (2) is arranged at the contact position of the rotating shaft (1) and the shell, M +1 rotor modules (3) are fixed on the rotating shaft (1), a stator module (4) is arranged between every two adjacent rotor modules (3), the stator modules (4) are fixedly connected with the shell, windings (4-3) on each stator module (4) are single-phase windings, the stator windings are mutually independent, each stator module (4) and the adjacent rotor modules (3) can be regarded as an independent unit motor, magnetic fields between the unit motors are mutually uncoupled, the unit motors can independently operate to generate torque, and when one stator module (4) fails, the stator module is cut off without affecting the operation of the whole motor; meanwhile, the phase difference of the current between the adjacent stator modules (4) is 360 DEG/M, and the torques generated by all the unit motors are combined into a total output torque on the rotating shaft (1), so that the total output torque is smoother.
2. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 1, characterized in that: the rotor modules (3) comprise end rotor modules and middle rotor modules, the number of the end rotor modules is two, the two end rotor modules are located at two ends of the rotating shaft (1), and the middle rotor module is located between the two end rotor modules.
3. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 2, wherein: the end rotor module comprises a single-face rotor disc (3-1), and a plurality of permanent magnets (3-3) are uniformly spaced along the circumferential direction on the axial end face, close to the inner side, of the single-face rotor disc (3-1); the middle rotor module comprises a double-faced rotor disc (3-2), and a plurality of permanent magnets (3-1) are uniformly spaced on two axial end faces of the double-faced rotor disc (3-2) along the circumferential direction.
4. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 2, wherein: the yoke thickness of the double-sided rotor disc (3-2) is at least twice the yoke thickness of the single-sided rotor disc (3-1).
5. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 1, characterized in that: the shell comprises a front end cover (5), a rear end cover (6) and a machine shell (7), wherein the front end cover (5) is connected to the front end of the machine shell (7), the rear end cover (6) is connected to the rear end of the machine shell (7), and the bearings (2) are fixed in mounting holes in the front end cover (5) and the rear end cover (6) respectively.
6. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 1, characterized in that: the stator module (4) comprises a stator disc (4-1), a stator support (4-2) and a winding (4-3), wherein the stator disc (4-1) is made of a soft magnetic composite material through processing by a powder metallurgy method; the number of the stator supports (4-2) is two, and cavities which are distributed along the circumferential direction and have the same shape with the boot part of the stator module are reserved on the end faces of the inner sides of the two stator supports (4-2) and are fixed on the shell; the winding (4-3) is correspondingly wound on the stator disc (4-1); the stator disc (4-1) is embedded between the stator supports (4-2) through a cavity to form a non-yoke segmented stator structure.
7. The single-phase series axial permanent magnet synchronous fault-tolerant motor of claim 2, wherein: in one unit motor, magnetic flux passes through an N pole on a single-sided rotor disc (3-1) at one end, a stator disc (4-1), an S pole on one side of a double-sided rotor disc (3-2), a yoke part of the double-sided rotor disc (3-2), an N pole on one side of the double-sided rotor disc (3-2), the stator disc (4-1), an S pole on the single-sided rotor disc (3-1) and a yoke part on the single-sided rotor disc (3-1) to form a closed loop, and the yoke part of the double-sided rotor disc (3-2) is a shared magnetic circuit of two adjacent unit motors.
8. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 2, wherein: the windings of the M stator discs (4-1) are wound in the stator module (4) in a tooth winding mode.
9. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 1, characterized in that: the number of the stator slots of each unit motor of the single-phase serial axial permanent magnet synchronous fault-tolerant motor is equal to the number of the rotor poles, and the number of the stator slots is even.
10. The single-phase serial axial permanent magnet synchronous fault-tolerant motor of claim 1, characterized in that: when M is more than or equal to 3, the drive control circuit of the single-phase serial axial permanent magnet synchronous fault-tolerant motor with M stator discs (4-1) is the same as that of the M-phase motor; when M <3, the drive control circuit of the single-phase serial axial permanent magnet synchronous fault-tolerant motor with M stator discs (4-1) is formed by connecting two single-phase motor control circuits with a 180-degree electrical angle difference in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211609595.1A CN115765366A (en) | 2022-12-14 | 2022-12-14 | Single-phase series axial permanent magnet synchronous fault-tolerant motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211609595.1A CN115765366A (en) | 2022-12-14 | 2022-12-14 | Single-phase series axial permanent magnet synchronous fault-tolerant motor |
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| CN115765366A true CN115765366A (en) | 2023-03-07 |
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| CN202211609595.1A Pending CN115765366A (en) | 2022-12-14 | 2022-12-14 | Single-phase series axial permanent magnet synchronous fault-tolerant motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116983028A (en) * | 2023-09-27 | 2023-11-03 | 湖南悦达生物医药有限公司 | Orthopedics power mobile phone |
| CN117526659A (en) * | 2023-11-27 | 2024-02-06 | 皖西学院 | Low-loss switch reluctance motor and control system thereof |
| CN117526659B (en) * | 2023-11-27 | 2024-05-17 | 皖西学院 | Low-loss switch reluctance motor and control system thereof |
-
2022
- 2022-12-14 CN CN202211609595.1A patent/CN115765366A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116983028A (en) * | 2023-09-27 | 2023-11-03 | 湖南悦达生物医药有限公司 | Orthopedics power mobile phone |
| CN116983028B (en) * | 2023-09-27 | 2023-11-28 | 湖南悦达生物医药有限公司 | Orthopedics power mobile phone |
| CN117526659A (en) * | 2023-11-27 | 2024-02-06 | 皖西学院 | Low-loss switch reluctance motor and control system thereof |
| CN117526659B (en) * | 2023-11-27 | 2024-05-17 | 皖西学院 | Low-loss switch reluctance motor and control system thereof |
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