CN114530964B - Rim asynchronous propulsion motor with auxiliary magnetic suspension capability - Google Patents
Rim asynchronous propulsion motor with auxiliary magnetic suspension capability Download PDFInfo
- Publication number
- CN114530964B CN114530964B CN202210153334.7A CN202210153334A CN114530964B CN 114530964 B CN114530964 B CN 114530964B CN 202210153334 A CN202210153334 A CN 202210153334A CN 114530964 B CN114530964 B CN 114530964B
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- Prior art keywords
- winding
- rim
- suspension
- stator
- rotor
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- 239000000725 suspension Substances 0.000 title claims abstract description 48
- 238000004804 winding Methods 0.000 claims abstract description 117
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000005339 levitation Methods 0.000 claims description 20
- 238000003475 lamination Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
-
- 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
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Abstract
The invention discloses a rim asynchronous propulsion motor with auxiliary magnetic suspension capability, and relates to the technical field of aviation electric propulsion and rim motors. The ducted propulsion structure formed by combining the rim asynchronous motor and the fan is an important propulsion scheme in the field of aviation electric propulsion; on the premise of not increasing the weight of the rim asynchronous motor, a special suspension winding is added by changing a winding method, so that the rim asynchronous motor topological structure with auxiliary magnetic suspension capability is designed, the problem that the rim asynchronous motor is difficult to support in an aviation propeller can be solved, and the overall structural strength of a propulsion system is further improved.
Description
Technical Field
The invention relates to the technical field of aviation electric propulsion and bearingless motors, in particular to a rim asynchronous propulsion motor with auxiliary magnetic suspension capability.
Background
With the development of carbon neutralization strategy and aviation electric propulsion technology, a ducted fan is a common propulsion mode, which is beneficial to improving the propulsion efficiency of an aircraft and reducing carbon emission and energy loss. The traditional ducted fan structure adopts a shaft drive motor to provide power, and the pneumatic influence caused by the increase of the volume of the motor is unavoidable along with the increase of the propulsion power. At present, a wheel rim propulsion motor and a fan are combined, a ducted fan layout mode of directly driving a fan blade tip by the wheel rim motor is popular, but with the increase of power, the weight of a wheel rim motor rotor is not negligible to the running stability of the fan, and a traditional fan center point supporting and limiting structure is difficult to support the fan with the motor rotor weight; as the inner diameter of the rim motor rotor increases, the bearing support means mounted on both sides of the rotor and the fan in the axial direction is also difficult to achieve.
Disclosure of Invention
Aiming at the defects of the background technology, the invention provides the rim asynchronous propulsion motor with auxiliary magnetic suspension capability, the gravity of a motor rotor and a blade shroud is counteracted by using the suspension force provided by an auxiliary suspension winding, the influence of the gravity on the operation of a fan and a fan supporting structure is reduced, and the rim asynchronous propulsion motor is suitable for rim-driven type ducted fans and has wide application prospect.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an asynchronous propulsion motor of rim with auxiliary magnetic suspension capability specifically includes: stator core, rotor core, armature winding, suspension winding, rotor conducting bar, rotor reinforcing structure, fan and fan supporting structure; the stator of the rim asynchronous propulsion motor is respectively wound with a stator armature winding and an auxiliary suspension winding, and the slots of the stator winding and the slots of the suspension winding are independent, namely, only the suspension winding or the armature winding is wound in one stator slot, and every two slots of the stator armature winding are separated by a slot required by the suspension winding; the stator armature winding of the rim asynchronous propulsion motor adopts a winding mode of annular winding, namely winding wires are wound on a stator yoke part to reduce the end size of the traditional winding mode; the suspension winding of the rim asynchronous propulsion motor adopts a lap winding mode, namely, the end parts of the suspension winding are arranged at two axial ends of the motor, so that magnetic leakage decoupling of the suspension winding and the armature winding is realized; the number of poles of the suspension winding is one pair of poles less than that of the armature winding, the current in the suspension winding is the same as the frequency of the armature current, the current phase difference is 30 degrees, and the phases of the armature winding and the suspension winding corresponding to the magnetic poles above the vertical direction of the motor are consistent; the radial outer end of the fan blade is combined with the inner side of the rotor, a supporting bearing is arranged at the center of the fan, the supporting bearing only bears the weight of the fan and limits the axial position of the fan, and the suspension force provided by the suspension winding counteracts the gravity of the motor rotor.
Further, each corresponding stator armature winding of each pole is an integer, each three-phase armature winding corresponds to 8 poles, the positive pole in each phase winding corresponding to each pole is a group of wires, the negative pole is another group of wires, the positive poles (A+, B+, C+) represent the directions of currents in the grooves as inflow, and the negative poles (A-, B-, C-) represent the directions of the currents in the grooves as outflow; taking the a-phase winding as an example: the lead starts to wind from the corresponding slot of the first A+ and the outgoing line bypasses the stator yoke part, and then winds in from the corresponding slot of the second A+ until the last A+ of the pole is outgoing, and the winding method of the lead in the corresponding slot of the A-phase winding is the same as the A+; the corresponding B-phase winding and C-phase winding of each pole adopt the same winding method as the A-phase winding.
Further, the stator of the rim asynchronous propulsion motor consists of a tooth slot type iron core lamination, the rotor consists of a high-strength silicon steel lamination, and the two ends of the rotor in the axial direction are tightly pressed by titanium alloy lamination to provide certain prestress.
Compared with the prior art, the invention has the following beneficial effects:
(1) The motor installation space in the wing can be canceled by adopting a rim driving mode;
(2) The levitation force counteracts the weight of the motor rotor, reduces the load born by the supporting structure, and has higher structural strength;
(3) The suspension winding can adjust the eccentric condition of the fan rotor, so that the safety is higher;
(4) The magnetic leakage of the armature winding and the suspension winding is decoupled through different winding modes, so that the interference is reduced, and the control is more accurate.
Drawings
FIG. 1 is a schematic diagram of a rim asynchronous propulsion motor with auxiliary magnetic levitation capability;
FIG. 2 is a schematic diagram of slot allocation for a rim asynchronous propulsion motor with auxiliary magnetic levitation capability;
fig. 3 is a schematic diagram of a stator slot armature winding of a rim asynchronous propulsion motor with auxiliary magnetic levitation capability.
Fig. 4 is a phase contrast plot of levitation current of phase a in the levitation winding and current of phase a in the stator winding of the motor.
Fig. 5 is a schematic diagram of a rim asynchronous propulsion motor with auxiliary magnetic levitation capability mounted on a fan.
Fig. 6 is a generated levitation force waveform.
In the figure: 1. stator core, 2, stator armature winding, 3, suspension winding, 4, rotor squirrel cage, 5, rotor core, 11, stator armature winding slot, 12, suspension winding slot, 13, stator yoke.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples:
this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Examples
As shown in fig. 1, the wheel rim asynchronous propulsion motor with auxiliary magnetic suspension capability is shown. The motor adopts a 72/8 pole stator structure, a 90-bar squirrel-cage rotor structure, and consists of a stator iron core 1, a stator armature winding 2, a suspension winding 3, a rotor squirrel-cage 4 and a rotor iron core 5, wherein a stator of the rim asynchronous propulsion motor consists of tooth slot type iron core laminations, and a rotor consists of high-strength silicon steel laminations and is compressed at two axial ends by titanium alloy laminations to provide certain prestress; as shown in fig. 2, the slots 11 of the stator armature windings and the slots 12 of the levitation windings are independent, i.e. only the levitation windings or only the armature windings are wound in one stator slot, and every two stator armature windings slots are separated by a slot required by the levitation windings; as shown in fig. 3, the stator armature winding adopts a toroidal winding method, that is, winding wires are wound on a stator yoke 13 to reduce the end size of a traditional winding mode, the positive electrode in each phase winding corresponding to each pole is one group of wires, the negative electrode is another group of wires, the positive electrode (a+, b+, c+) represents the direction of current in a slot as an inflow, the negative electrode (a-, B-, C-) represents the direction of current in the slot as an outflow, and the black arrow represents the flow direction of current; taking the a-phase winding as an example: the lead starts to wind from the corresponding slot of the first A+ and the outgoing line bypasses the stator yoke part, and then winds in from the corresponding slot of the second A+ until the last A+ of the pole is outgoing; the winding method of the lead in the groove corresponding to the A-in the A-phase winding is the same as A+; the corresponding B phase winding and C phase winding of each pole adopt the same winding method as the A phase winding; the suspension winding of the rim asynchronous propulsion motor adopts a lap winding mode, namely, the end parts of the suspension winding are arranged at two axial ends of the motor, so that magnetic leakage decoupling of the suspension winding and the armature winding is realized; to achieve rotor levitation, the number of poles of the levitation winding is one pair of poles less than the number of poles of the armature winding; as shown in fig. 4, the current in the levitation winding and the armature current have the same frequency, the current phase difference is 30 degrees, and the phases of the armature winding and the levitation winding corresponding to the magnetic poles above the vertical direction of the motor are consistent, so as to keep the vertical upward direction of the levitation magnetic force; as shown in fig. 5, a supporting bearing is installed at the center of the fan, and only bears the weight of the fan and limits the axial position of the fan, and the suspension force provided by the suspension winding counteracts the weight of the motor rotor; as shown in FIG. 6, the maximum output average value of the levitation force is 70N, the weight of the motor rotor is 0.6kg, and the required levitation force is far exceeded.
Claims (3)
1. The rim asynchronous propulsion motor with auxiliary magnetic suspension capability is characterized by comprising: stator core, rotor core, armature winding, suspension winding, rotor conducting bar, rotor reinforcing structure, fan and fan supporting structure; the stator of the rim asynchronous propulsion motor is respectively wound with a stator armature winding and an auxiliary suspension winding, and the slots of the stator winding and the slots of the suspension winding are independent, namely, only the suspension winding or the armature winding is wound in one stator slot, and every two slots of the stator armature winding are separated by a slot required by the suspension winding; the stator armature winding of the rim asynchronous propulsion motor adopts a winding mode of annular winding, namely winding wires are wound on a stator yoke part to reduce the end size of the traditional winding mode; the suspension winding of the rim asynchronous propulsion motor adopts a lap winding mode, namely, the end parts of the suspension winding are arranged at two axial ends of the motor, so that magnetic leakage decoupling of the suspension winding and the armature winding is realized; the number of poles of the suspension winding is one pair of poles less than that of the armature winding, the current in the suspension winding is the same as the frequency of the armature current, the current phase difference is 30 degrees, and the phases of the armature winding and the suspension winding corresponding to the magnetic poles above the vertical direction of the motor are consistent; the radial outer end of the fan blade is combined with the inner side of the rotor, a supporting bearing is arranged at the center of the fan, the supporting bearing only bears the weight of the fan and limits the axial position of the fan, and the suspension force provided by the suspension winding counteracts the gravity of the motor rotor.
2. A rim asynchronous propulsion motor with auxiliary magnetic levitation capability as defined in claim 1, wherein: each corresponding stator armature winding of each pole is a whole, each three-phase armature winding corresponds to 8 poles, the positive pole in each phase winding corresponding to each pole, namely, the wire with the current direction in the groove as the inflow, is a group of wires, the negative pole, namely, the wire with the current direction in the groove as the outflow, is another group of wires, and taking the phase A winding as an example: the lead starts to wind from the corresponding slot of the first A+ and the outgoing line bypasses the stator yoke part, and then winds in from the corresponding slot of the second A+ until the last A+ of the pole is outgoing, and the winding method of the lead in the corresponding slot of the A-phase winding is the same as the A+; the corresponding B-phase winding and C-phase winding of each pole adopt the same winding method as the A-phase winding.
3. A rim asynchronous propulsion motor with auxiliary magnetic levitation capability as defined in claim 1, wherein: the stator of the rim asynchronous propulsion motor consists of a tooth slot type iron core lamination, the rotor consists of a high-strength silicon steel lamination, and the two ends of the rotor in the axial direction are tightly pressed by titanium alloy lamination to provide certain prestress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210153334.7A CN114530964B (en) | 2022-02-18 | 2022-02-18 | Rim asynchronous propulsion motor with auxiliary magnetic suspension capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210153334.7A CN114530964B (en) | 2022-02-18 | 2022-02-18 | Rim asynchronous propulsion motor with auxiliary magnetic suspension capability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114530964A CN114530964A (en) | 2022-05-24 |
| CN114530964B true CN114530964B (en) | 2024-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210153334.7A Active CN114530964B (en) | 2022-02-18 | 2022-02-18 | Rim asynchronous propulsion motor with auxiliary magnetic suspension capability |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522858A (en) * | 2011-12-20 | 2012-06-27 | 青岛海立美达电机有限公司 | Split-type magnetic suspension motor and assembling method thereof |
| CN104362825A (en) * | 2014-10-31 | 2015-02-18 | 国网安徽凤台县供电有限责任公司 | Winding type asynchronous motor without bearing and manufacturing method thereof |
| CN110397602A (en) * | 2019-06-27 | 2019-11-01 | 中国船舶重工集团公司第七一九研究所 | A kind of integrated pipeline pump |
| CN112406434A (en) * | 2019-08-23 | 2021-02-26 | 中国科学院沈阳自动化研究所 | Electric water-air dual-purpose propeller |
| CN113241919A (en) * | 2021-05-27 | 2021-08-10 | 江苏大学 | Bearing-free composite rotor cage type asynchronous motor |
| CN113815832A (en) * | 2021-09-19 | 2021-12-21 | 苏州汉瑞船舶推进系统有限公司 | Rim-driven semi-submerged propeller |
-
2022
- 2022-02-18 CN CN202210153334.7A patent/CN114530964B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522858A (en) * | 2011-12-20 | 2012-06-27 | 青岛海立美达电机有限公司 | Split-type magnetic suspension motor and assembling method thereof |
| CN104362825A (en) * | 2014-10-31 | 2015-02-18 | 国网安徽凤台县供电有限责任公司 | Winding type asynchronous motor without bearing and manufacturing method thereof |
| CN110397602A (en) * | 2019-06-27 | 2019-11-01 | 中国船舶重工集团公司第七一九研究所 | A kind of integrated pipeline pump |
| CN112406434A (en) * | 2019-08-23 | 2021-02-26 | 中国科学院沈阳自动化研究所 | Electric water-air dual-purpose propeller |
| CN113241919A (en) * | 2021-05-27 | 2021-08-10 | 江苏大学 | Bearing-free composite rotor cage type asynchronous motor |
| CN113815832A (en) * | 2021-09-19 | 2021-12-21 | 苏州汉瑞船舶推进系统有限公司 | Rim-driven semi-submerged propeller |
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| Publication number | Publication date |
|---|---|
| CN114530964A (en) | 2022-05-24 |
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