CN111211657A - Axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor - Google Patents
Axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor Download PDFInfo
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- CN111211657A CN111211657A CN202010107716.7A CN202010107716A CN111211657A CN 111211657 A CN111211657 A CN 111211657A CN 202010107716 A CN202010107716 A CN 202010107716A CN 111211657 A CN111211657 A CN 111211657A
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Abstract
The invention discloses an axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor which comprises two bearingless motors, a rotating shaft and an axial thrust disc, wherein the first bearingless motor comprises a first stator and a rotor, and the second bearingless motor comprises a second stator and a rotor. The number of teeth of the two motor rotors is 4, the two motor rotors and an axial thrust disc are sleeved on a rotating shaft together, and the axial thrust disc is positioned between the first rotor and the second rotor; the number of teeth of the two motor stators is 12, and each tooth of the first stator and the second stator is sleeved with a winding; when the winding on the first stator is conducted with the winding on the second stator, the axial thrust disc generates magnetic pull force by utilizing axial leakage flux of the teeth of the stator, so that axial suspension control is realized, radial main flux provides radial suspension force and torque, and finally, the five-degree-of-freedom suspension high-speed stable operation of the motor is realized. The motor has the advantages of simple structure, low production cost, high reliability and capability of realizing axial and radial suspension force decoupling.
Description
Technical Field
The invention relates to an axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor, and belongs to the technical field of magnetic suspension switched reluctance motors of motors.
Background
As one of the important trends in motor development, high-speed operation is important for solving the key technology of how to realize high-speed operation. When the motor reaches the high enough rotational speed, the requirement to the bearing performance is higher, and traditional mechanical bearing can't satisfy high-speed motor's demand, and novel high-speed bearing price is too expensive, and the cost in the motor production process that increases has hindered the development of motor high-speed, industrialization. The switched reluctance motor has the advantages that the switched reluctance motor is simple in structure and free of permanent magnets due to the fact that only a stator and a rotor and a winding coil are arranged in the high-speed motors, cost is greatly saved, and meanwhile reliability of the motor in operation is improved.
The bearingless switched reluctance motor can realize rotary motion, can also enable a rotor to realize suspension, and aims at high-speed application industries such as turbine machinery and compressors, the five-degree-of-freedom suspension function needs to be realized while the rotary performance is ensured.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the axial disc type five-freedom-degree suspension bearingless switched reluctance motor has the advantages of being capable of achieving five-freedom-degree suspension, radial and axial decoupling control, large in output power, high in axial bearing capacity, small in motor size, low in production cost and the like.
The invention adopts the following technical scheme for solving the technical problems:
an axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor comprises a first bearingless motor, a second bearingless motor, a rotating shaft and an axial thrust disc; the first bearingless motor and the second bearingless motor have the same structure, the first bearingless motor comprises a first stator and a first rotor, and the second bearingless motor comprises a second stator and a second rotor;
the first rotor is nested in the first stator, the second rotor is nested in the second stator, the first rotor, the second rotor and the axial thrust disc are all sleeved on the rotating shaft, the axial thrust disc is located between the first rotor and the second rotor, and the first rotor and the second rotor are symmetrical relative to the center of the axial thrust disc;
the number of the tooth poles of the first rotor and the second rotor is 4, and the tooth poles of the first rotor and the tooth poles of the second rotor are staggered by a mechanical angle of 15 degrees; the number of the teeth of the first stator and the second stator is 12, a winding coil is wound on a yoke part of each tooth of the first stator, a winding coil is wound on a yoke part of each tooth of the second stator, and all the winding coils are independently controlled;
the first rotor, the second rotor and the axial thrust disc are integrally formed, no gap exists between the first rotor and the axial thrust disc, no gap exists between the second rotor and the axial thrust disc, a gap exists between the first stator and the axial thrust disc, a gap exists between the second stator and the axial thrust disc, the part of each tooth pole of the first stator or the second stator except a winding coil is defined to comprise two ends, one end is the end part of a tooth pole of the stator, and the diameter of the axial thrust disc is between the end part of the tooth pole of the stator and the other end.
In a preferred embodiment of the present invention, the first stator and the second stator have the same tooth width.
In a preferred embodiment of the present invention, the first rotor and the second rotor have the same tooth width.
As a preferable aspect of the present invention, the first bearingless motor includes three-phase windings, each phase winding is composed of four winding coils, two adjacent winding coils are different by 90 °, and two adjacent winding coils are different by 30 °.
As a preferable aspect of the present invention, the second bearingless motor includes three-phase windings, each phase winding includes four winding coils, two adjacent winding coils differ by 90 °, and two adjacent winding coils differ by 30 °.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the invention can realize the decoupling control of radial suspension and axial suspension on the premise of not increasing the axial winding coil, and has simple structure, low production cost and high reliability.
2. The axial thrust disc is added in the axial useless space of the two motors, the axial suspension control is realized by utilizing the axial leakage of the stator tooth poles, the volume of the motor is not increased, and the space utilization rate of the motor is improved.
3. The invention is a double-platform bearingless switched reluctance motor structure, and has the advantages of large output torque, radial four-degree-of-freedom suspension and high power density.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional structure of an axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor.
Fig. 2 is a schematic diagram of a three-dimensional structure of a rotor of the axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor.
Fig. 3 is a schematic diagram of a three-dimensional structure of a stator of the axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor of the invention.
Fig. 4 is a top view of the axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor of the present invention.
Fig. 5 is a schematic diagram of air gap flux distribution of the axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor of the present invention.
The device comprises a stator, a rotor.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, the schematic diagram of the three-dimensional structure of the axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor provided by the invention comprises a first bearingless motor, a second bearingless motor, a rotating shaft 7 and an axial thrust disk 8; the first bearingless motor comprises a first stator 1, a first rotor 2 and a first winding coil 3, and the second bearingless motor comprises a second stator 4, a second rotor 5 and a second winding coil 6.
As shown in fig. 2, according to the rotor three-dimensional structure schematic diagram of the axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor provided by the invention, the first rotor 2 is nested in the first stator 1, the second rotor 5 is nested in the second stator 4, the axial thrust disk 8 is located between the first rotor 2 and the second rotor 5, the three rotors share one rotating shaft 7, the number of teeth of the first rotor 2 and the number of teeth of the second rotor 5 are both 4, and the teeth of the first rotor 2 and the teeth of the second rotor 5 are staggered by a mechanical angle of 15 °.
As shown in fig. 3, according to the three-dimensional structure diagram of the stator of the axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor provided by the present invention, the number of the teeth poles of the first stator 1 and the second stator 4 is 12, the yoke of each tooth pole of the first stator 1 is sleeved with the first winding coil 3, and the yoke of each tooth pole of the second stator 4 is sleeved with the second winding coil 6. The arc of each stator tooth is 15 °. The remaining part of each tooth pole of the first stator 1 or the second stator 4 except the part sleeved with the winding coil comprises two ends, wherein one end is the end part of the tooth pole of the stator. The diameter of the axial thrust disc 8 is between the end part of the stator tooth pole and the other end, namely the diameter of the axial thrust disc 8 is larger than the inner diameter of the first stator 1 or the second stator 4 and is smaller than the inner diameter of the first stator 1 or the second stator 4 plus the length of the stator tooth pole minus the width of the winding coil. When the first winding coil 3 and the second winding coil 6 are conducted, the axial thrust disc 8 generates magnetic pull force by utilizing axial leakage flux of the stator tooth poles, so that axial suspension control is realized, radial main flux provides radial suspension force and torque, and finally, five-degree-of-freedom suspension high-speed stable operation of the motor is realized.
According to fig. 4, a top view of an axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor, in a first bearingless motor, each phase winding is composed of four winding coils, two adjacent winding coils are 90 ° apart, and 4 windings are independently controlled, and the first bearingless motor totally comprises three-phase windings, namely four windings of a1_ i, a2_ i, A3_ i and a4_ i of a phase, four windings of B1_ i, B2_ i, B3_ i and B4_ i of a phase, four windings of C1_ i, C2_ i, C3_ i and C4_ i of a phase, and the adjacent two-phase windings are 30 ° apart; in the second bearingless motor, each phase winding is composed of four winding coils, the phase difference between two adjacent winding coils is 90 degrees, 4 windings are independently controlled, the second bearingless motor comprises a three-phase winding, four windings of A1_ II, A2_ II, A3_ II and A4_ II of A phase, four windings of B1_ II, B2_ II, B3_ II and B4_ II of B phase, four windings of C1_ II, C2_ II, C3_ II and C4_ II of C phase, and the phase difference between two adjacent winding coils is 30 degrees.
The control methods of the first bearingless motor and the second bearingless motor can adopt current chopping control, single pulse control and PWM control.
According to the schematic diagram of air gap flux distribution of an axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor shown in fig. 5, an axial thrust disc 8 is located between a first rotor 2 and a second rotor 5 and fixed on a rotating shaft 7, a radial air gap is reserved between the first rotor 2 and the first stator 1 in the radial direction, so that a radial air gap flux is generated, the radial suspension of the motor is realized, an axial air gap is reserved between the axial thrust disc 8 and axial tooth poles of the first stator 1 and between the axial tooth poles of the second stator 4, so that an axial leakage flux is generated, the axial suspension of the motor is realized, and finally the five-degree-of-freedom suspension of the motor is realized.
The invention provides an axial disc type five-freedom suspension bearingless switched reluctance motor, which utilizes the excitation of a winding on each stator tooth pole to generate magnetic pull force to act on a motor rotor so as to generate rotary motion and realize α1Direction, β1Direction, α2Direction sum β2Direction, Z direction five-freedom suspension. The axial disk type five-freedom-degree suspension bearingless switched reluctance motor has the advantages of simple structure, low production cost, capability of realizing axial and radial suspension force decoupling and high reliability.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (5)
1. An axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor is characterized by comprising a first bearingless motor, a second bearingless motor, a rotating shaft and an axial thrust disc; the first bearingless motor and the second bearingless motor have the same structure, the first bearingless motor comprises a first stator and a first rotor, and the second bearingless motor comprises a second stator and a second rotor;
the first rotor is nested in the first stator, the second rotor is nested in the second stator, the first rotor, the second rotor and the axial thrust disc are all sleeved on the rotating shaft, the axial thrust disc is located between the first rotor and the second rotor, and the first rotor and the second rotor are symmetrical relative to the center of the axial thrust disc;
the number of the tooth poles of the first rotor and the second rotor is 4, and the tooth poles of the first rotor and the tooth poles of the second rotor are staggered by a mechanical angle of 15 degrees; the number of the teeth of the first stator and the second stator is 12, a winding coil is wound on a yoke part of each tooth of the first stator, a winding coil is wound on a yoke part of each tooth of the second stator, and all the winding coils are independently controlled;
the first rotor, the second rotor and the axial thrust disc are integrally formed, no gap exists between the first rotor and the axial thrust disc, no gap exists between the second rotor and the axial thrust disc, a gap exists between the first stator and the axial thrust disc, a gap exists between the second stator and the axial thrust disc, the part of each tooth pole of the first stator or the second stator except a winding coil is defined to comprise two ends, one end is the end part of a tooth pole of the stator, and the diameter of the axial thrust disc is between the end part of the tooth pole of the stator and the other end.
2. The axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor of claim 1, wherein the tooth widths of the first stator and the second stator are equal.
3. The axial disk five-degree-of-freedom suspension bearingless switched reluctance motor of claim 1, wherein the tooth widths of the first rotor and the second rotor are equal.
4. The axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor according to claim 1, wherein the first bearingless motor comprises three-phase windings, each phase winding is composed of four winding coils, two adjacent winding coils are different by 90 degrees, and two adjacent winding coils are different by 30 degrees.
5. The axial disk type five-degree-of-freedom suspension bearingless switched reluctance motor according to claim 1, wherein the second bearingless switched reluctance motor comprises three-phase windings, each phase winding is composed of four winding coils, two adjacent winding coils are different by 90 degrees, and two adjacent winding coils are different by 30 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010107716.7A CN111211657B (en) | 2020-02-21 | 2020-02-21 | Axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor |
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| CN202010107716.7A CN111211657B (en) | 2020-02-21 | 2020-02-21 | Axial disc type five-degree-of-freedom suspension bearingless switched reluctance motor |
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| CN111211657A true CN111211657A (en) | 2020-05-29 |
| CN111211657B CN111211657B (en) | 2021-04-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436616A (en) * | 2020-11-04 | 2021-03-02 | 南京航空航天大学 | Axial magnetic flow five-degree-of-freedom magnetic suspension motor |
| CN112713812A (en) * | 2020-12-16 | 2021-04-27 | 江苏大学 | Electric decoupling type magnetic suspension switched reluctance motor |
| CN114400853A (en) * | 2022-02-21 | 2022-04-26 | 南京航空航天大学 | Bearingless switched reluctance motor |
| CN114977706A (en) * | 2022-05-31 | 2022-08-30 | 福州大学 | Double-stator bearingless magnetic flux switching motor with five-degree-of-freedom magnetic suspension rotor |
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| CN103089656A (en) * | 2011-10-28 | 2013-05-08 | 财团法人工业技术研究院 | Magnetic suspension type liquid refrigerant pump |
| CN103929010A (en) * | 2014-03-25 | 2014-07-16 | 中国人民解放军海军工程大学 | Vertical type hybrid magnetic suspension flywheel energy storage system |
| CN106100497A (en) * | 2016-06-13 | 2016-11-09 | 南京邮电大学 | A kind of control method of composite rotors bearing-free switch reluctance motor |
| CN108258956A (en) * | 2018-01-09 | 2018-07-06 | 南京邮电大学 | A kind of wide rotor toothing bearing-free switch magnetic-resistance generator control method of simplex winding |
| CN109038991A (en) * | 2018-09-12 | 2018-12-18 | 北京航空航天大学 | A kind of 36/4 structure high-speed magneto |
| CN110011469A (en) * | 2019-04-22 | 2019-07-12 | 江苏大学 | A kind of vehicle-mounted energy storage system for magnetic floating flywheel with inhibition torsion gyroscopic effect |
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2020
- 2020-02-21 CN CN202010107716.7A patent/CN111211657B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089656A (en) * | 2011-10-28 | 2013-05-08 | 财团法人工业技术研究院 | Magnetic suspension type liquid refrigerant pump |
| CN103929010A (en) * | 2014-03-25 | 2014-07-16 | 中国人民解放军海军工程大学 | Vertical type hybrid magnetic suspension flywheel energy storage system |
| CN106100497A (en) * | 2016-06-13 | 2016-11-09 | 南京邮电大学 | A kind of control method of composite rotors bearing-free switch reluctance motor |
| CN108258956A (en) * | 2018-01-09 | 2018-07-06 | 南京邮电大学 | A kind of wide rotor toothing bearing-free switch magnetic-resistance generator control method of simplex winding |
| CN109038991A (en) * | 2018-09-12 | 2018-12-18 | 北京航空航天大学 | A kind of 36/4 structure high-speed magneto |
| CN110011469A (en) * | 2019-04-22 | 2019-07-12 | 江苏大学 | A kind of vehicle-mounted energy storage system for magnetic floating flywheel with inhibition torsion gyroscopic effect |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436616A (en) * | 2020-11-04 | 2021-03-02 | 南京航空航天大学 | Axial magnetic flow five-degree-of-freedom magnetic suspension motor |
| CN112713812A (en) * | 2020-12-16 | 2021-04-27 | 江苏大学 | Electric decoupling type magnetic suspension switched reluctance motor |
| CN114400853A (en) * | 2022-02-21 | 2022-04-26 | 南京航空航天大学 | Bearingless switched reluctance motor |
| CN114400853B (en) * | 2022-02-21 | 2023-10-24 | 南京航空航天大学 | Bearingless switch reluctance motor |
| CN114977706A (en) * | 2022-05-31 | 2022-08-30 | 福州大学 | Double-stator bearingless magnetic flux switching motor with five-degree-of-freedom magnetic suspension rotor |
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