CN216929758U - Axial magnetic bearing structure of motor and magnetic suspension high-speed motor - Google Patents
Axial magnetic bearing structure of motor and magnetic suspension high-speed motor Download PDFInfo
- Publication number
- CN216929758U CN216929758U CN202220191198.6U CN202220191198U CN216929758U CN 216929758 U CN216929758 U CN 216929758U CN 202220191198 U CN202220191198 U CN 202220191198U CN 216929758 U CN216929758 U CN 216929758U
- Authority
- CN
- China
- Prior art keywords
- stator
- magnetic bearing
- axial magnetic
- speed rotor
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses an axial magnetic bearing structure of a motor and a magnetic suspension high-speed motor, comprising: the axial magnetic bearing left end stator is arranged on the left side of the high-speed rotor; the axial magnetic bearing right end stator is arranged on the right side of the high-speed rotor; the left end stator and the right end stator of the axial magnetic bearing both comprise stator cores, the inner side of each stator core is provided with an annular groove, a stator coil is arranged in each annular groove, an air gap is formed between each high-speed rotor and the corresponding stator core, and a closed magnetic circuit loop is formed between each of the left end stator and the right end stator of the axial magnetic bearing and each of the high-speed rotors, so that mutual electromagnetic force is generated between each of the left end stator and the right end stator of the axial magnetic bearing and each of the high-speed rotors. The utility model solves the problems of complex assembly ratio and high assembly requirement of the thrust disc in the prior art.
Description
Technical Field
The utility model relates to the technical field of magnetic suspension motors, in particular to an axial magnetic bearing structure of a motor and a magnetic suspension high-speed motor.
Background
The magnetic suspension high-speed motor is composed of a magnetic suspension bearing without contact and mechanical friction and a high-speed high-power permanent magnet synchronous motor and is directly loaded; the magnetic suspension bearing system has the advantages of high efficiency, low noise, few faults, no need of a lubricating system and the like, and even if the magnetic suspension bearing has a fault, the rotor rotating at high speed can still be safely stopped by depending on a protective bearing in the system, so that the equipment cannot be seriously damaged.
Generally, a magnetic levitation high-speed motor is composed of a high-speed motor, two-end radial magnetic bearings, one-end axial magnetic bearing, and a protection bearing, as shown in fig. 1. In particular, the axial magnetic bearing is composed of stator parts distributed at two ends of a thrust disc, the stator parts at the two ends are introduced with different currents to generate different forces to act on the thrust disc to form resultant force, and then the resultant force acts on a rotor to counteract the axial thrust generated by a load end, so that the axial balance of the rotor is kept.
Generally, a thrust disc is disposed between two axial magnetic bearing stators, the diameter of the thrust disc is greater than the inner diameter of the stators, and the thrust disc is a high-speed rotating member, and a certain air gap is maintained between the two axial magnetic bearing stators to prevent mutual rubbing. The arrangement mode leads to complex assembly, and the high-speed characteristic of the thrust disc leads to the assembly of the thrust disc and the motor rotor and the effect of high-speed centrifugal force needs to be considered, so that the design is improper, and certain harm can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides an axial magnetic bearing structure of a motor and a magnetic suspension high-speed motor, and solves the problems of complex assembly ratio and high assembly requirement of a thrust disc in the prior art.
In order to achieve the above object, in a first aspect, the present invention provides the following technical solutions: an axial magnetic bearing structure of an electric machine, comprising:
the axial magnetic bearing left end stator is arranged on the left side of the high-speed rotor;
the axial magnetic bearing right end stator is arranged on the right side of the high-speed rotor;
the left end stator and the right end stator of the axial magnetic bearing both comprise stator cores, the inner side of each stator core is provided with an annular groove, a stator coil is arranged in each annular groove, an air gap is formed between each high-speed rotor and the corresponding stator core, and a closed magnetic circuit loop is formed between each of the left end stator and the right end stator of the axial magnetic bearing and each of the high-speed rotors, so that mutual electromagnetic force is generated between each of the left end stator and the right end stator of the axial magnetic bearing and each of the high-speed rotors.
Preferably, a positioning cover plate is arranged on one side of the stator core, the stator core and the positioning cover plate together wrap the stator coil, one side of the positioning cover plate is connected with the stator core, and the other side of the positioning cover plate is arranged close to the high-speed rotor.
Preferably, the air gap includes a first air gap between the high-speed rotor and the stator core and a second air gap between the high-speed rotor and the positioning cover plate.
Preferably, the second air gap is an axial gap or a radial gap between the positioning cover plate and the high-speed rotor.
In a second aspect, the present invention further provides a magnetic suspension high-speed motor, which includes a casing and a high-speed rotor disposed inside the casing, wherein a motor stator connected to the casing is disposed outside the high-speed rotor, and the left end stator and the right end stator of the axial magnetic bearing as described in the first aspect are respectively mounted on two sides of the high-speed rotor.
Preferably, a radial magnetic bearing and a protective bearing are installed between the high-speed rotor and the casing.
Compared with the prior art, the utility model has the beneficial effects that:
an independent thrust disc is omitted, the high-speed rotor has the function of the thrust disc, the reliability is higher, the axial magnetic bearing stators at the two ends can directly act the electromagnetic force on the high-speed rotor, and the stability is better; because the thrust disc is eliminated, the high-speed motor has a simpler structure and is convenient to install.
Drawings
FIG. 1 is a schematic structural diagram of a conventional magnetic levitation high-speed motor;
FIG. 2 is a schematic structural diagram of a first embodiment of the magnetic levitation high-speed motor of the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of the magnetic levitation high-speed motor of the present invention;
FIG. 4 is a schematic view of a magnetic circuit structure of an axial magnetic bearing according to a first embodiment of the present invention;
FIG. 5 is a schematic view of a magnetic circuit structure of an axial magnetic bearing according to a second embodiment of the present invention;
reference numerals:
1. the high-speed rotor comprises a high-speed rotor, 2, a radial magnetic bearing, 3, a shell, 4, a motor stator, 9, a protective bearing, 10, an axial magnetic bearing left end stator, 11, an axial magnetic bearing right end stator, 101, a stator core, 102, a positioning cover plate, 103, a stator coil, 104, a first air gap, 105 and a second air gap.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 2-5, in order to solve the problems of complex assembly and high assembly requirement of the thrust disc in the prior art, the utility model provides the following technical solutions:
example 1:
the present embodiment includes an axial magnetic bearing structure of an electric machine, including:
an axial magnetic bearing left stator 10 arranged on the left side of the high-speed rotor 1;
the axial magnetic bearing right end stator 11 is arranged on the right side of the high-speed rotor 1;
the left end stator 10 and the right end stator 11 of the axial magnetic bearing both comprise stator cores 101, the inner side of each stator core 101 is provided with an annular groove, each annular groove is internally provided with a stator coil 103, an air gap is formed between the high-speed rotor 1 and the stator cores 101, and a closed magnetic circuit loop is formed between the left end stator 10 and the right end stator 11 of the axial magnetic bearing and the high-speed rotor 1.
After the stator coil 103 is energized with current, the axial magnetic bearing left end stator 10 and the axial magnetic bearing right end stator 11 generate mutual electromagnetic force with the high-speed rotor 1, as shown in fig. 4-5, the axial magnetic bearing left end stator 10 and the axial magnetic bearing right end stator 11 respectively apply F1 and F2 to the high-speed rotor 1, and a resultant force F on the high-speed rotor 1 is formedCombination of Chinese herbs＝F1+F2And the axial thrust of the load end is counteracted, and the axial stability of the high-speed rotor 1 is kept.
In this embodiment, a positioning cover plate 102 is disposed on one side of the stator core 101, the stator core 101 and the positioning cover plate 102 together enclose the stator coil 103, one side of the positioning cover plate 102 is connected to the stator core 101, the other side of the positioning cover plate is disposed near the high-speed rotor 1, a detachable structure is disposed between the positioning cover plate 102 and the stator core 101, both the positioning cover plate 102 and the stator core 101 are made of magnetic materials, and the stator coil 103 can be conveniently mounted after the positioning cover plate 102 is removed.
In order to ensure a non-contact state between the high-speed rotor 1 and the left-end stator 10 and the right-end stator 11 of the axial magnetic bearing, and to enable the magnetic field to act, the air gaps include a first air gap 104 between the high-speed rotor 1 and the stator core 101, and a second air gap 105 between the high-speed rotor 1 and the positioning cover plate 102, as shown in fig. 4, wherein the first air gap 104 is an axial gap between the stator core 101 and the high-speed rotor 1, and the second air gap 105 is also an axial gap between the positioning cover plate 102 and the high-speed rotor 1.
As a second embodiment between the positioning cover plate 102 and the high-speed rotor 1, as shown in fig. 5, the second air gap 105 is a radial gap between the positioning cover plate 102 and the high-speed rotor 1, so that the positional relationship between the high-speed rotor 1 and the left-end stator 10 and the right-end stator 11 of the axial magnetic bearing is more compact.
Example 2:
the embodiment includes a magnetic suspension high-speed motor, which includes a casing 3 and a high-speed rotor 1 disposed inside the casing 3, wherein a motor stator 4 connected to the casing 3 is disposed outside the high-speed rotor 1, the axial magnetic bearing left end stator 10 and the axial magnetic bearing right end stator 11 as described in embodiment 1 are respectively mounted on two sides of the high-speed rotor 1, and in addition, a radial magnetic bearing 2 and a protection bearing 9 are mounted between the high-speed rotor 1 and the casing 3, so as to ensure high-speed stable rotation of the high-speed rotor 1.
As can be seen from fig. 2-3, in the magnetic suspension high-speed motor of the present embodiment, a separate thrust disc is eliminated, the high-speed rotor itself has the function of the thrust disc, the reliability is higher, and the axial magnetic bearing stators at the two ends can directly act on the electromagnetic force on the high-speed rotor, so that the stability is better; because the thrust disc is eliminated, the high-speed motor has a simpler structure and is convenient to install.
It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (6)
1. An axial magnetic bearing structure of an electric machine, comprising:
an axial magnetic bearing left end stator (10) arranged on the left side of the high-speed rotor (1);
the right end stator (11) of the axial magnetic bearing is arranged on the right side of the high-speed rotor (1);
the axial magnetic bearing left end stator (10) and the axial magnetic bearing right end stator (11) both comprise stator iron cores (101), annular grooves are formed in the inner sides of the stator iron cores (101), stator coils (103) are arranged in the annular grooves, air gaps are formed between the high-speed rotor (1) and the stator iron cores (101), closed magnetic circuit loops are formed between the axial magnetic bearing left end stator (10) and the axial magnetic bearing right end stator (11) and the high-speed rotor (1), and mutual electromagnetic force is generated between the axial magnetic bearing left end stator (10) and the axial magnetic bearing right end stator (11) and the high-speed rotor (1).
2. The axial magnetic bearing structure of an electric machine according to claim 1, characterized in that: one side of the stator core (101) is provided with a positioning cover plate (102), the stator core (101) and the positioning cover plate (102) wrap the stator coil (103), one side of the positioning cover plate (102) is connected with the stator core (101), and the other side of the positioning cover plate is arranged close to the high-speed rotor (1).
3. The axial magnetic bearing structure of an electric machine according to claim 2, characterized in that: the air gaps comprise a first air gap (104) between the high-speed rotor (1) and the stator core (101) and a second air gap (105) between the high-speed rotor (1) and the positioning cover plate (102).
4. The axial magnetic bearing structure of an electric machine according to claim 3, characterized in that: the second air gap (105) is an axial gap or a radial gap between the positioning cover plate (102) and the high-speed rotor (1).
5. A magnetic suspension high-speed motor is characterized by comprising a machine shell (3) and a high-speed rotor (1) arranged in the machine shell (3), wherein a motor stator (4) connected with the machine shell (3) is arranged on the outer side of the high-speed rotor (1), and the left end stator (10) of an axial magnetic bearing and the right end stator (11) of the axial magnetic bearing as claimed in claim 1 are respectively arranged on two sides of the high-speed rotor (1).
6. The magnetically levitated high speed motor of claim 5, wherein: and a radial magnetic bearing (2) and a protective bearing (9) are arranged between the high-speed rotor (1) and the casing (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220191198.6U CN216929758U (en) | 2022-01-25 | 2022-01-25 | Axial magnetic bearing structure of motor and magnetic suspension high-speed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220191198.6U CN216929758U (en) | 2022-01-25 | 2022-01-25 | Axial magnetic bearing structure of motor and magnetic suspension high-speed motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216929758U true CN216929758U (en) | 2022-07-08 |
Family
ID=82262952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220191198.6U Active CN216929758U (en) | 2022-01-25 | 2022-01-25 | Axial magnetic bearing structure of motor and magnetic suspension high-speed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216929758U (en) |
-
2022
- 2022-01-25 CN CN202220191198.6U patent/CN216929758U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2820446C (en) | Electric centrifugal compressor for vehicles | |
| US8847451B2 (en) | Combination radial/axial electromagnetic actuator with an improved axial frequency response | |
| CN101149077B (en) | Permanent-magnetic biased axial radial magnetic bearing | |
| US20030057784A1 (en) | Magnetically levitated motor and magnetic bearing apparatus | |
| JP2014005833A (en) | Electric centrifugal compressor for vehicles | |
| KR20060051920A (en) | Rotary electric machine using permanent magnet and wind turbine system | |
| Asama et al. | Optimal suspension winding configuration in a homo-polar bearingless motor | |
| US20210265905A1 (en) | Electrical Machine with Electric Motor and Magnetic Gear | |
| CN101207309A (en) | High speed magnetic suspension permanent magnet motor without bearing | |
| Sugimoto et al. | A novel stator structure for active axial force improvement in a one-axis actively positioned single-drive bearingless motor | |
| Sugimoto et al. | Design of homopolar consequent-pole bearingless motor with wide magnetic gap | |
| CN108712043B (en) | Stator permanent magnet biased five-degree-of-freedom bearingless asynchronous motor | |
| CN112722242A (en) | Magnetic suspension ducted fan for electric aircraft | |
| CN108233656B (en) | Ultra-high-speed disc type permanent magnet synchronous motor | |
| CN216929758U (en) | Axial magnetic bearing structure of motor and magnetic suspension high-speed motor | |
| CN101282050B (en) | Non-groove stator of evaporative cooling motor | |
| CN108696191A (en) | A kind of integrated form five degrees of freedom without bearing asynchronous machine | |
| Ibrahim et al. | A novel toroidal permanent magnet motor structure with high torque density and enhanced cooling | |
| CN213575188U (en) | Permanent magnet bias type magnetic suspension bearing and motor | |
| RU2540696C1 (en) | High-rate electrical machine with vertical shaft | |
| CN111043156B (en) | Novel structure crossed tooth quadrupole hybrid magnetic bearing | |
| CN112510964B (en) | Superconducting DC motor without commutation device | |
| CN111022499B (en) | Radial large bearing capacity hybrid magnetic bearing | |
| CN111102292A (en) | Magnetic suspension bearing assembly, outer rotor motor assembly and motor | |
| Jaatinen et al. | Comparison of winding arrangements of a high-speed interior permanent magnet bearingless machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |