CN108521239B - Three-stator type permanent magnet biased magnetic suspension switched reluctance motor - Google Patents
Three-stator type permanent magnet biased magnetic suspension switched reluctance motor Download PDFInfo
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- CN108521239B CN108521239B CN201810231137.6A CN201810231137A CN108521239B CN 108521239 B CN108521239 B CN 108521239B CN 201810231137 A CN201810231137 A CN 201810231137A CN 108521239 B CN108521239 B CN 108521239B
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- 239000000725 suspension Substances 0.000 title claims abstract description 105
- 238000004804 winding Methods 0.000 claims abstract description 76
- 238000005339 levitation Methods 0.000 claims description 15
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Combustion & Propulsion (AREA)
- Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention relates to a three-stator type permanent magnet biased magnetic suspension switched reluctance motor, which comprises: the permanent magnet motor comprises a salient pole type outer stator, a salient pole type rotor, two salient pole type inner stators and a permanent magnet ring. The outer stator, the rotor and the two inner stators are nested from outside to inside with the same central shaft, the two inner stators are horizontally distributed along the axial direction, and the permanent magnet ring is arranged between the two inner stators and is nested with the same central shaft. The permanent magnet ring is axially magnetized to provide a bias magnetic field, and the bias magnetic field is superposed with the control magnetic fields generated by the suspension windings on the two inner stators to generate suspension force. The magnetic flux path of the main winding on the outer stator and the suspension magnetic flux path are independent, so that the coupling problem between the starting function and the rotor suspension function is solved; the permanent magnetic ring provides a bias magnetic field, so that the running loss of the motor is reduced, and the running reliability of the motor is higher.
Description
Technical Field
The invention relates to a three-stator type permanent magnet biased magnetic suspension switched reluctance motor which can be used as a high-speed and high-efficiency motor and is particularly suitable for the field of flywheel batteries.
Background
With the continuous high-speed development of economy in China, many fields such as high-speed machine tools, centrifuges, compressors, flywheel batteries and the like need to be driven by a high-speed/ultrahigh-speed motor, however, in the high-speed/ultrahigh-speed motor with a mechanical bearing supporting a rotating shaft, because the friction resistance is increased due to the high-speed rotation of the motor, the bearing is seriously abraded, regular maintenance is needed, and because a large amount of heat is generated in the friction process, the working efficiency of the motor is low, the high-speed and high-efficiency motor is more and more emphasized, however, the development of the high-speed and high-efficiency motor is restricted by.
Disclosure of Invention
Based on the defects of the prior art, the three-stator type permanent magnet biased magnetic suspension switched reluctance motor has the advantages of low power consumption, high efficiency, no coupling of torque and suspension force and simple and flexible control.
The technical scheme of the invention is as follows: a three-stator type permanent magnet biased magnetic suspension switched reluctance motor comprises: the permanent magnet motor comprises a salient pole type outer stator 1, a salient pole type rotor 2, a salient pole type inner stator a3-1, a salient pole type inner stator b3-2 and a permanent magnet ring 6. The inner side of the outer stator 1 is provided with a rotor 2, the inner side of the rotor 2 is provided with an inner stator and a permanent magnet ring 6, and the two inner stators are an inner stator a3-1 and an inner stator b3-2 in sequence from one end to the other end along the axial direction; the permanent magnet ring 6 is arranged between the inner stator a3-1 and the inner stator b3-2, the outer stator 1 is provided with a main winding pole 1-2, and the main winding pole 1-2 is provided with a main winding 4, so that the starting function is realized; the rotor 2 is provided with a rotor salient pole 2-1; the two inner stators are provided with suspension winding poles, and the two inner stators a3-1 and the inner stator b3-2 are provided with a suspension winding a5-1 and a suspension winding b5-2, so that the suspension function is realized.
Further, 12 main winding poles 1-2 are arranged on the outer stator 1 at equal intervals, 8 rotor salient poles 2-1 are arranged on the rotor 2 at equal intervals, and four suspension poles are respectively arranged on the two inner stators at equal intervals.
The main windings on the main winding poles which are arranged oppositely along the radial direction of the central shaft are mutually connected in series to form a phase, the windings on the same direction of the inner stator a3-1 and the inner stator b3-2 are mutually connected in series, and the suspension windings on the suspension poles which are arranged oppositely along the radial direction of the central shaft are mutually independent and are controlled independently.
Further, the permanent magnet ring 6 is axially magnetized, and the thickness of the permanent magnet ring does not exceed the thickness of the inner stator a 3-1-2.
Further, the generated bias magnetic field starts from the N pole and sequentially passes through: an inner stator a3-1, an air gap between the inner stator a3-1 and the rotor 2, an air gap between the rotor 2, the inner stator b3-2 and the rotor 2, and an inner stator b3-2 return to the S pole; the magnetic field is superposed with the control magnetic field generated by the suspension winding to generate suspension force, and the suspension force is independent from the torque magnetic field generated by the main winding, so that decoupling is realized.
Further, the outer stator 1, the rotor 2, the inner stator a3-1 and the inner stator b3-2 are made of silicon steel sheets in a superposed mode.
Further, the permanent magnet ring 6) is made of neodymium iron boron.
The invention has the following beneficial effects:
1. the main winding on the outer stator realizes the starting function, the suspension windings on the two inner stators realize the stable suspension function of the rotor, the structure is clear, the function is clear, and the maintenance and the control are convenient.
2. The bias magnetic field of the three-stator type permanent magnet bias magnetic suspension switched reluctance motor is provided by the permanent magnet ring and is combined with the control magnetic field generated by the suspension winding to form a suspension magnetic field so as to generate suspension force, thereby further reducing the electromagnetic power consumption of the device and improving the operation efficiency.
3. The magnetic flux path generated by the main winding is independent of the magnetic flux path superposed by the bias magnetic field generated by the suspension winding and the permanent magnetic ring, no restriction exists, the main winding and the suspension winding are decoupled, and the stability and reliability of system operation and the flexibility of control are improved.
Drawings
Fig. 1 is a front view of a three-stator type permanent magnet biased magnetic levitation switched reluctance motor along the xy plane.
Wherein: 1. an outer stator; 2. a rotor; 3. an inner stator 3; 4. a main winding; 5. a suspension winding;
fig. 2 is a sectional view of a three-stator type permanent magnet biased magnetic levitation switched reluctance motor along the yz plane.
Wherein: 3-1, an inner stator a; 3-2, an inner stator b; 1-1, an outer stator yoke; 1-2, main winding poles; 2-1, rotor salient pole; 2-2, rotor yoke; 3-1-1, a suspension pole on the inner stator a; 3-1-2, yoke of inner stator a; 3-2-1, a suspension pole on the inner stator b; 3-2-2, yoke of inner stator b; 5-1, a suspension winding a on the inner stator a; 5-2, a suspension winding b on the inner stator b; 6. a permanent magnet ring; 7. a rotating shaft.
Fig. 3 is a schematic diagram of the bias magnetic field generated by the permanent magnet of the three-stator type permanent magnet bias magnetic suspension switched reluctance motor.
Wherein: 5-3, a suspension winding on the inner stator a; 5-4, a suspension winding on the inner stator b.
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. 1 and 2, the three-stator permanent magnet biased magnetic levitation switched reluctance motor of the present invention includes an outer stator 1, a rotor 2, an inner stator a3-1, an inner stator b3-2, a main winding pole 1-2, a main winding 4, a levitation pole a3-1-1, a levitation pole b3-2-1, a levitation winding a5-1, a levitation winding b5-2, a permanent magnet ring 6, and a rotating shaft 7. The permanent magnet motor is characterized in that an outer stator 1, a rotor 2, an inner stator a3-1 and an inner stator b3-2 are sequentially nested from outside to inside with a central shaft, a permanent magnet ring 6 is arranged between the inner stator a3-1 and the inner stator b3-2, the thickness of the permanent magnet ring does not exceed that of an inner stator yoke a3-1-2, and the permanent magnet ring is nested with the central shaft.
The outer stator 1 comprises twelve main winding poles 1-2, the twelve main winding poles 1-2 are arranged on the outer stator 1 at equal intervals, the main winding 4 is wound on the main winding poles 1-2, radial opposite vertical four poles are mutually connected in series to form one phase, the three phases are divided together, only one phase is drawn in the figure, and two phases are omitted.
The rotor 2 includes 8 rotor salient poles 2-1, which are disposed on the rotor 2 at equal intervals without a winding.
The inner stator a3-1 comprises four suspension poles a3-1-1, the four suspension poles a3-1-1 are arranged on the inner stator a3-1 at equal intervals, suspension windings 5 are wound on the inner stator a3-1 respectively, the suspension windings are not connected in series, and currents are controlled independently.
The inner stator b3-2 comprises four suspension poles b3-2-1, the four suspension poles b3-2-1 are arranged on the inner stator b3-2 at equal intervals, suspension windings 5 are wound on the inner stator b3-2 respectively, the suspension windings are not connected in series, and currents are controlled independently.
The inner stator a3-1 and the suspension winding a5-1 in the positive direction of the y axis of the inner stator b3-2 are connected in series with the suspension winding b5-2 to provide suspension current, and the suspension windings in other vertical radial directions are also arranged.
The permanent magnet ring 6 is disposed between the inner stator a3-1 and the inner stator b3-2, and has a thickness not exceeding the inner stator yoke a 3-1-2.
The suspension winding 5 and the permanent magnet ring 6 jointly realize the suspension of the rotor 2, and the suspension force is obtained by independently adjusting the current of each suspension winding 5.
The levitation force in the y direction is controlled by the current i of the levitation winding 5y1And iy2Control when iy1When the magnetic suspension is conducted, a control magnetic field generated by the suspension winding a5-1 is superposed with a bias magnetic field generated by the permanent magnet ring 6, so that the magnetic density of the positive direction of the y axis is smaller than that of the negative direction of the y axis, and therefore, the suspension force of the positive direction of the y axis is generated; on the contrary, when iy2When the device is conducted, the y-axis negative direction suspension force is generated; similarly, the suspension force in the x-axis direction is controlled by the current i of the suspension winding 5x1And ix2Controlling to generate suspension force in positive and negative directions of the x-axis direction; the suspension force in the x direction and the y direction can be combined into the suspension force in any direction, thereby realizing the self-suspension function of the rotor 2, i in the figurex1+，ix2+，iy1+，iy2+Currents flow into the suspension winding in the positive direction and the negative direction of the x axis and the y axis of the suspension winding 5 respectively; i.e. ix1-，ix2-，iy1-，iy2-The current flows out in the positive direction and the negative direction of the x axis and the y axis of the suspension pole winding 5 respectively. Because the alignment area of the suspension pole a3-1-1 and the suspension pole b3-2-1 with the rotor 2 is always equal to the width of the suspension pole a3-1-1 and the suspension pole b3-2-1 during the rotation of the rotor 2, the generation of radial force is facilitated, and the radial force does not change along with the position angle of the rotor 2, the rotor 2 can be controlled at the radial center position only by small current of the suspension winding 5, and the suspension capacity can be effectively enhanced.
As shown in fig. 3, the permanent magnet ring 6 is axially magnetized, and the bias magnetic field flux path flows through: the permanent magnet ring 6N pole is provided with an inner stator yoke a3-1-2, an inner stator suspension pole a3-1-1, an air gap between the inner stator suspension pole a3-1-1 and the rotor 2, a rotor yoke 2-2, an air gap between the inner stator suspension pole b3-2-1 and the rotor 2, an inner stator suspension pole b3-2-1 and an inner stator yoke b3-2-2, and returns to the permanent magnet ring 6S pole. The bias magnetic field and the control magnetic field generated by the suspension winding 5 are superposed to generate suspension force, which is beneficial to generating radial force, further enhances the stability of suspension capacity and improves the radial suspension performance.
In summary, the main winding 4 is wound on the main winding pole 1-2 of the outer stator 1 to realize the starting function; a suspension winding a5-1 and a suspension winding b5-2 are respectively wound on the inner stator suspension pole a3-1-1 and the inner stator suspension pole b3-2-1, and the suspension winding a5-1 and the suspension winding b5-2 are mutually connected in series to realize the suspension function of the suspension rotor 2; the permanent magnet ring 6 is arranged between the inner stator a3-1 and the inner stator b3-2 to generate a bias magnetic field, so that radial force is generated, stable suspension of the rotor 2 is improved, and running loss is reduced; the magnetic flux paths of the main winding 4 and the suspension winding 5 are mutually independent, so that the coupling problem between the starting and suspension functions of the rotor is solved; given radial force current, the suspension force is kept basically unchanged in the rotation process of the rotor 2, and the suspension performance is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The utility model provides a three stator type permanent magnetism biasing magnetic suspension switched reluctance motor which characterized in that: the permanent magnet motor comprises an outer stator (1), a rotor (2), an inner stator and a permanent magnet ring, wherein the inner stator comprises two inner stators, and the outer stator (1), the rotor (2), the inner stators and the permanent magnet ring are nested with each other at the same central axis; the inner side of the outer stator (1) is provided with a rotor (2), the inner side of the rotor (2) is provided with an inner stator, and the two inner stators are an inner stator a (3-1) and an inner stator b (3-2) from one end to the other end along the axial direction; the permanent magnet ring (6) is arranged between the inner stator a (3-1) and the inner stator b (3-2), the outer stator (1) is provided with a main winding pole (1-2), and the main winding pole (1-2) is provided with a main winding (4) to realize the starting function; the rotor (2) is provided with a rotor salient pole (2-1); the two inner stators are provided with suspension winding poles, and the two inner stators a (3-1) and the two inner stators b (3-2) at the upper end and the lower end are provided with a suspension winding a (5-1) and a suspension winding b (5-2) to realize the suspension function; the permanent magnetic ring (6) is axially magnetized to provide a bias magnetic field, so that the suspension function is realized.
2. The three-stator type permanent magnet biased magnetic levitation switched reluctance motor as claimed in claim 1, wherein: the outer stator (1) is provided with 12 main winding poles (1-2) at equal intervals, the rotor (2) is provided with 8 rotor salient poles (2-1) at equal intervals, and the two inner stators are respectively provided with four suspension poles at equal intervals.
3. The three-stator type permanent magnet biased magnetic levitation switched reluctance motor as claimed in claim 1, wherein: the thickness of the permanent magnet ring (6) does not exceed the thickness of the inner stator yoke a (3-1-2).
4. The three-stator type permanent magnet biased magnetic levitation switched reluctance motor as claimed in claim 1, wherein: the bias magnetic field generated by the permanent magnetic ring (6) starts from the N pole and sequentially passes through: an inner stator a (3-1), an air gap between the inner stator a (3-1) and the rotor (2), an air gap between the inner stator b (3-2) and the rotor (2), and the inner stator b (3-2) return to an S pole; the magnetic field is superposed with the control magnetic field generated by the suspension winding to generate suspension force, and the suspension force is independent from the torque magnetic field generated by the main winding, so that decoupling is realized.
5. The three-stator type permanent magnet biased magnetic levitation switched reluctance motor as claimed in claim 1, wherein: the main windings on the main winding poles (1-2) which are arranged oppositely along the radial direction of the central shaft are mutually connected in series to form one phase, the windings on the same direction of the inner stator a (3-1) and the inner stator b (3-2) are mutually connected in series, and the suspension windings on the suspension poles which are arranged oppositely along the radial direction of the central shaft are mutually independent and are independently controlled.
6. The three-stator type permanent magnet biased magnetic levitation switched reluctance motor as claimed in claim 1, wherein: the outer stator (1), the rotor (2), the inner stator a (3-1) and the inner stator b (3-2) are made of silicon steel sheets in a superposed mode.
7. The three-stator type permanent magnet biased magnetic levitation switched reluctance motor as claimed in claim 1, wherein: the permanent magnet ring (6) is made of neodymium iron boron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231137.6A CN108521239B (en) | 2018-03-20 | 2018-03-20 | Three-stator type permanent magnet biased magnetic suspension switched reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231137.6A CN108521239B (en) | 2018-03-20 | 2018-03-20 | Three-stator type permanent magnet biased magnetic suspension switched reluctance motor |
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| Publication Number | Publication Date |
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| CN108521239A CN108521239A (en) | 2018-09-11 |
| CN108521239B true CN108521239B (en) | 2020-03-31 |
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| CN201810231137.6A Active CN108521239B (en) | 2018-03-20 | 2018-03-20 | Three-stator type permanent magnet biased magnetic suspension switched reluctance motor |
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| CN112953045A (en) * | 2021-02-07 | 2021-06-11 | 南京工程学院 | Radial strong-interference-resistance magnetic suspension switched reluctance motor |
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| CN102122872B (en) * | 2010-01-11 | 2015-04-15 | 上海稳得新能源科技有限公司 | Wind driven generator with axial magnetic levitation bearing |
| CN103618424B (en) * | 2013-12-02 | 2016-08-17 | 南京工程学院 | A kind of Double-stator magnetic suspension switch reluctance starting/power generation machine |
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Effective date of registration: 20220810 Address after: 400000 No.8, Shuangxing Avenue, Biquan street, Bishan District, Chongqing Patentee after: Ernst energy storage technology (Chongqing) Co.,Ltd. Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: JIANGSU University |
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Effective date of registration: 20240125 Address after: No. 8, Shuangxing Avenue, Biquan street, Bishan District, Chongqing Patentee after: Chongqing Kaici Intelligent Technology Research Institute Co.,Ltd. Country or region after: China Address before: 400000 No.8, Shuangxing Avenue, Biquan street, Bishan District, Chongqing Patentee before: Ernst energy storage technology (Chongqing) Co.,Ltd. Country or region before: China |