CN111181339A - Stator modularized double-rotor doubly-salient permanent magnet motor - Google Patents
Stator modularized double-rotor doubly-salient permanent magnet motor Download PDFInfo
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- CN111181339A CN111181339A CN202010095911.2A CN202010095911A CN111181339A CN 111181339 A CN111181339 A CN 111181339A CN 202010095911 A CN202010095911 A CN 202010095911A CN 111181339 A CN111181339 A CN 111181339A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention discloses a stator modularized double-rotor doubly-salient permanent magnet motor, which comprises an inner salient pole rotor, an outer salient pole rotor and a stator positioned between the inner salient pole rotor and the outer salient pole rotor, wherein independent air gaps are respectively formed between the inner salient pole rotor and the outer salient pole rotor and the stator; the stator comprises a plurality of stator modules, each stator module comprises a stator yoke part, and an outer stator tooth and an inner stator tooth which are respectively connected with the outer side and the inner side of the middle position of the stator yoke part, and the stator yoke parts of the stator modules are connected through permanent magnets to form a complete stator; armature windings are wound on the outer stator teeth and the inner stator teeth of each stator module; along with the synchronous rotation of the inner rotor and the outer rotor and the change of the relative position of the stator, positive and negative alternating back electromotive forces are induced in armature windings of the inner stator and the outer stator of the motor. The invention solves the problem of serious magnetic leakage at the stator side of the traditional single-rotor double-salient permanent magnet motor, and improves the utilization rate of the permanent magnet and the torque density of the motor.
Description
Technical Field
The invention belongs to the field of permanent magnet motors, and particularly relates to a double-rotor doubly-salient permanent magnet motor.
Background
The permanent magnet and the armature winding of the doubly-salient permanent magnet motor are both positioned on the stator, so that the cooling of the winding and the permanent magnet is easy to realize, the temperature rise control of the motor is easy to realize, and the reliable operation of the motor can be ensured. The rotor of the biconvex permanent magnet motor adopts a salient pole iron core structure, has no armature winding or permanent magnet, has high mechanical strength, is suitable for high-speed operation, and is very suitable for high-speed electric driving occasions such as aerospace, electric automobiles and the like. However, the inner rotor (outer rotor) of the doubly-salient permanent magnet motor has serious stator outer side (stator inner side) magnetic flux leakage, so that the utilization rate of the permanent magnet is low, and the magnetic energy cannot be effectively utilized.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention provides a stator modularized double-rotor double-salient permanent magnet motor, which solves the problem of magnetic flux leakage at the stator side of the traditional single-rotor double-salient permanent magnet motor and improves the utilization rate of permanent magnets.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a stator modularized double-rotor doubly-salient permanent magnet motor comprises an inner salient pole rotor, an outer salient pole rotor and a stator positioned between the inner salient pole rotor and the outer salient pole rotor, wherein independent air gaps are formed between the inner salient pole rotor and the stator and between the outer salient pole rotor and the stator respectively; the stator comprises a plurality of stator modules, each stator module comprises a stator yoke part, and an outer stator tooth and an inner stator tooth which are respectively connected with the outer side and the inner side of the middle position of the stator yoke part, and the stator yoke parts of the stator modules are connected through permanent magnets to form a complete stator; armature windings are wound on the outer stator teeth and the inner stator teeth of each stator module, the positive and negative directions of the armature windings on the outer stator teeth and the inner stator teeth of the same stator module are the same, the armature windings belonging to the same phase on each outer stator tooth are connected in series in an opposite phase to form a single-phase winding, the armature windings belonging to the same phase on each inner stator tooth are connected in series in an opposite phase to form a single-phase winding, and the armature windings belonging to the same phase on the inner stator teeth and the outer stator teeth are connected in series in an opposite phase to form a single-; the number of the pole pairs of the inner salient pole rotor is the same as that of the outer salient pole rotor, and the center line of the salient pole teeth of the inner salient pole rotor is right opposite to the center line of the groove of the outer salient pole rotor.
Based on the preferred scheme of the technical scheme, the permanent magnets adopt an annular magnetizing mode, and the magnetizing directions of the adjacent permanent magnets are opposite.
Based on the preferable scheme of the technical scheme, the inner salient pole rotor and the outer salient pole rotor are mechanically fixed into a whole through the end parts of the inner salient pole rotor and the outer salient pole rotor, and synchronous rotation is achieved.
Based on above-mentioned technical scheme's preferred scheme, the outside and the inboard at stator yoke portion both ends department of stator module are connected with half outer stator tooth and half interior stator tooth respectively, the permanent magnet sets up between stator yoke portion intermediate position and both ends of every stator module, and half outer stator tooth and half interior stator tooth concatenation formation complete outer stator tooth and interior stator tooth at two adjacent stator module both ends, do not twine on the outer stator tooth that forms and the interior stator tooth and establish armature winding.
Based on the preferable scheme of the technical scheme, the sizes of the outer stator teeth and the inner stator teeth in the middle position of the stator yoke part of each stator module are larger than the sizes of the outer stator teeth and the inner stator teeth formed by splicing half outer stator teeth and half inner stator teeth at two ends of two adjacent stator modules.
Adopt the beneficial effect that above-mentioned technical scheme brought:
(1) the permanent magnet is placed at the joint of the yoke part of the modularized stator, and the permanent magnet is shared by the inner motor and the outer motor, so that the problem of magnetic flux leakage at two sides of the stator of the traditional doubly-salient permanent magnet motor is solved, and the utilization rate of the permanent magnet and the torque density of the motor are improved; the permanent magnet is placed on the stator, so that heat dissipation of the permanent magnet is facilitated;
(2) the stator adopts a modular design, so that the processing and batch production are convenient, the processed modular stator can be directly wound and then assembled to complete the assembly, and the production process and the assembly process are simplified;
(3) the stator winding adopts a modular mode of tooth-spaced winding, so that the winding difficulty can be reduced, and the slot fullness rate can be improved; in addition, the fault tolerance performance of the motor can be improved;
(4) the inner rotor and the outer rotor of the motor adopt salient pole iron core structures with high mechanical strength, and the inner rotor and the outer rotor of the motor synchronously rotate and coaxially output mechanical power, so that the motor is suitable for high-speed operation.
Drawings
Fig. 1 is a schematic cross-sectional view of an electric motor of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a stator module in embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of inner and outer rotor poles of the present invention;
FIG. 4 is a schematic diagram of the winding connection of the present invention;
FIG. 5 is a waveform diagram of no-load back electromotive force of a three-phase winding according to embodiment 1 of the present invention;
FIG. 6 is a schematic structural view of a stator module in embodiment 2 of the present invention
Fig. 7 is a schematic cross-sectional view of a motor of embodiment 2 of the present invention;
description of reference numerals: 1. an outer salient pole rotor; 2. outer rotor teeth; 3. a stator module; 4. armature windings on the outer stator teeth; 5. armature windings on the inner stator teeth; 6. an inner salient-pole rotor; 7. an outer air gap; 8. an inner air gap; 9-19 and a stator module.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
Example 1
As shown in fig. 1, a stator modularized double-rotor doubly salient permanent magnet motor includes an inner salient pole rotor 6, an outer salient pole rotor 1, and a stator therebetween, where independent air gaps 8 and 7 are formed between the inner salient pole rotor 6 and the outer salient pole rotor 1 and the stator, respectively. The stator comprises a plurality of stator modules 3, as shown in fig. 2, each stator module 3 comprises a stator yoke, and an outer stator tooth and an inner stator tooth which are respectively connected with the outer side and the inner side of the middle position of the stator yoke, and the stator yokes of each stator module are connected through permanent magnets to form a complete stator. Armature windings 5 and 4 are wound around the outer stator teeth and the inner stator teeth of each stator module. As shown in fig. 3, the number of pole pairs of the inner salient-pole rotor is the same as that of the outer salient-pole rotor (i.e., the two rotors have the same number of teeth), and the center line of the salient-pole teeth of the inner salient-pole rotor is opposite to the center line of the grooves of the outer salient-pole rotor. The magnetic flux emitted by the permanent magnet of the stator yoke part passes through the stator yoke part, the inner stator teeth, the outer stator teeth, the inner salient pole iron core rotor and the outer salient pole iron core rotor to respectively form a series circuit.
In this embodiment, the permanent magnets adopt an annular magnetizing mode, and magnetizing directions of adjacent permanent magnets are opposite. The inner salient pole rotor and the outer salient pole rotor are mechanically fixed into a whole through the end parts of the inner salient pole rotor and the outer salient pole rotor, and synchronous rotation is achieved.
The connection of the armature windings on stator modules nos. 3 and 9-19 will be described with reference to fig. 4. A + coils are wound on No. 17 outer stator teeth, and A-coils are wound on No. 18 outer stator teeth; because each stator tooth spans 150 electrical angles, in order to obtain a balanced three-phase armature winding, a B-coil is wound on the No. 19 outer stator tooth, and a B + coil is wound on the No. 3 outer stator tooth; c + coils are wound on the No. 9 outer stator teeth, C-coils are wound on the No. 10 outer stator teeth, A-coils are wound on the No. 11 outer stator teeth, and A + coils are wound on the No. 12 outer stator teeth; a B + coil is wound on the No. 13 outer stator tooth, a B-coil is wound on the No. 14 outer stator tooth, a C-coil is wound on the No. 15 outer stator tooth, and a C + coil is wound on the No. 16 outer stator tooth. Armature windings which are in the same phase on the outer stator teeth are connected in series in an opposite direction to form a single-phase winding.
The positive and negative directions of the coils on the inner stator teeth are the same as those of the coils on the outer stator teeth. The distribution mode of the three-phase winding on the inner stator teeth in the counterclockwise direction is the same as the arrangement principle of the coils on the outer stator teeth. Armature windings which are in the same phase on the teeth of the inner stator are connected in series in the reverse direction to form a single-phase winding. The inner stator teeth and the outer stator teeth are in the same-phase armature windings and are reversely connected to form a single-phase winding. After symmetrical three-phase current is introduced into the three-phase winding on the stator, synchronous rotation of the inner rotor and the outer rotor can be realized, and conversion from electric energy to mechanical energy is realized.
Fig. 5 shows three-phase back electromotive force waveforms of the dual-rotor doubly salient permanent magnet motor in the embodiment, and as can be seen from the waveforms, the sine degree of the back electromotive force waveforms of the motor is good, brushless alternating current control can be achieved, and the motor has good torque performance.
Example 2
In order to simplify the processing and assembling process and improve the torque density and fault-tolerant performance of the motor, the stator module in the embodiment adopts the structure shown in fig. 6, and the structure of the inner salient pole rotor and the outer salient pole rotor of the motor and the corresponding mode of the inner tooth groove and the outer tooth groove are consistent with those in fig. 3. The connection mode of the armature windings of the inner stator and the outer stator of the motor is shown in fig. 7, and the difference from fig. 4 is that the armature windings are not wound on the inner stator teeth and the outer stator teeth at the connection position of each stator module, and the winding directions and the sequence of the coils on the other inner stator teeth and the outer stator teeth are not different from those in fig. 4. The winding connection mode can realize physical isolation between phases of the windings and improve the running reliability of the motor. In addition, the stator teeth wound with the armature windings can also adopt a large tooth structure so as to improve the winding factor and the torque density.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, the present invention patent can be expanded to a M-phase pole slot matched doubly salient permanent magnet motor, and can also be expanded to an axial flux motor, a linear motor, and the like, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention.
Claims (5)
1. The utility model provides a stator modularization birotor biconvex permanent-magnet machine which characterized in that: the rotor comprises an inner salient pole rotor, an outer salient pole rotor and a stator positioned between the inner salient pole rotor and the outer salient pole rotor, wherein independent air gaps are formed between the inner salient pole rotor and the stator and between the outer salient pole rotor and the stator respectively; the stator comprises a plurality of stator modules, each stator module comprises a stator yoke part, and an outer stator tooth and an inner stator tooth which are respectively connected with the outer side and the inner side of the middle position of the stator yoke part, and the stator yoke parts of the stator modules are connected through permanent magnets to form a complete stator; armature windings are wound on the outer stator teeth and the inner stator teeth of each stator module, the positive and negative directions of the armature windings on the outer stator teeth and the inner stator teeth of the same stator module are the same, and the armature windings belonging to the same phase on the inner stator teeth and the outer stator teeth are connected in series in an opposite phase manner to form a single-phase winding; the number of the pole pairs of the inner salient pole rotor is the same as that of the outer salient pole rotor, and the center line of the salient pole teeth of the inner salient pole rotor is right opposite to the center line of the groove of the outer salient pole rotor.
2. The stator modular dual rotor doubly salient permanent magnet machine of claim 1, wherein: the permanent magnets adopt an annular magnetizing mode, and the magnetizing directions of the adjacent permanent magnets are opposite.
3. The stator modular dual rotor doubly salient permanent magnet machine of claim 1, wherein: the inner salient pole rotor and the outer salient pole rotor are mechanically fixed into a whole through the end parts of the inner salient pole rotor and the outer salient pole rotor, and synchronous rotation is achieved.
4. The stator modular dual rotor doubly salient permanent magnet machine of claim 1, wherein: the outer side and the inner side of the two ends of the stator yoke of each stator module are respectively connected with half outer stator teeth and half inner stator teeth, the permanent magnet is arranged between the middle position and the two ends of the stator yoke of each stator module, the half outer stator teeth and the half inner stator teeth at the two ends of each two adjacent stator modules are spliced to form complete outer stator teeth and complete inner stator teeth, and armature windings are not wound on the outer stator teeth and the inner stator teeth formed by splicing.
5. The stator modular dual rotor doubly salient permanent magnet machine of claim 4, wherein: the size of the outer stator teeth and the size of the inner stator teeth in the middle of the stator yoke of each stator module are larger than the size of the outer stator teeth and the size of the inner stator teeth formed by splicing half outer stator teeth and half inner stator teeth at two ends of two adjacent stator modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010095911.2A CN111181339A (en) | 2020-02-17 | 2020-02-17 | Stator modularized double-rotor doubly-salient permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010095911.2A CN111181339A (en) | 2020-02-17 | 2020-02-17 | Stator modularized double-rotor doubly-salient permanent magnet motor |
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| Publication Number | Publication Date |
|---|---|
| CN111181339A true CN111181339A (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010095911.2A Pending CN111181339A (en) | 2020-02-17 | 2020-02-17 | Stator modularized double-rotor doubly-salient permanent magnet motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910114A (en) * | 2021-01-25 | 2021-06-04 | 上海电力大学 | Four-phase 16/18-pole hybrid excitation fault-tolerant reluctance generator |
| CN114640195A (en) * | 2022-04-20 | 2022-06-17 | 江苏大学 | Multi-interval efficient permanent magnet fault-tolerant motor and high-reliability operation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020047418A1 (en) * | 2000-09-14 | 2002-04-25 | Masahiro Seguchi | Compact and reliable structure of multi-rotor synchronous machine |
| CN102969850A (en) * | 2011-09-01 | 2013-03-13 | 三星电机株式会社 | Switched reluctance motor |
| CN103762759A (en) * | 2014-01-28 | 2014-04-30 | 哈尔滨工业大学 | Radial magnetic flux modularization polyphase motor having high magnetism-insulation capability |
| CN108448849A (en) * | 2018-02-27 | 2018-08-24 | 江苏大学 | A kind of stator permanent magnetic type birotor magnetic field modulation motor and its design method |
| CN109818471A (en) * | 2019-02-01 | 2019-05-28 | 江苏大学 | A kind of double air gaps magnetic field modulation magneto |
-
2020
- 2020-02-17 CN CN202010095911.2A patent/CN111181339A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020047418A1 (en) * | 2000-09-14 | 2002-04-25 | Masahiro Seguchi | Compact and reliable structure of multi-rotor synchronous machine |
| CN102969850A (en) * | 2011-09-01 | 2013-03-13 | 三星电机株式会社 | Switched reluctance motor |
| CN103762759A (en) * | 2014-01-28 | 2014-04-30 | 哈尔滨工业大学 | Radial magnetic flux modularization polyphase motor having high magnetism-insulation capability |
| CN108448849A (en) * | 2018-02-27 | 2018-08-24 | 江苏大学 | A kind of stator permanent magnetic type birotor magnetic field modulation motor and its design method |
| CN109818471A (en) * | 2019-02-01 | 2019-05-28 | 江苏大学 | A kind of double air gaps magnetic field modulation magneto |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910114A (en) * | 2021-01-25 | 2021-06-04 | 上海电力大学 | Four-phase 16/18-pole hybrid excitation fault-tolerant reluctance generator |
| CN114640195A (en) * | 2022-04-20 | 2022-06-17 | 江苏大学 | Multi-interval efficient permanent magnet fault-tolerant motor and high-reliability operation method thereof |
| CN114640195B (en) * | 2022-04-20 | 2023-08-15 | 江苏大学 | Multi-region permanent magnet fault-tolerant motor and operation method thereof |
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Application publication date: 20200519 |