CN113809843A - Three-phase symmetrical 12k/8k electro-magnetic doubly salient motor - Google Patents
Three-phase symmetrical 12k/8k electro-magnetic doubly salient motor Download PDFInfo
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- CN113809843A CN113809843A CN202110994174.4A CN202110994174A CN113809843A CN 113809843 A CN113809843 A CN 113809843A CN 202110994174 A CN202110994174 A CN 202110994174A CN 113809843 A CN113809843 A CN 113809843A
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- 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
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention discloses a three-phase symmetrical 12k/8k electro-magnetic doubly salient motor which comprises a stator, a rotor, an armature winding and a direct-current exciting winding. The stator and the rotor are coaxially arranged and are of a salient-pole tooth slot structure, the stator comprises stator poles and stator slots, the rotor comprises rotor poles and rotor slots, grooves between adjacent stator poles are the stator slots, the number of the stator poles is 12N, the number of the rotor poles is 8N, and N is a positive integer; a three-phase armature winding is arranged in each stator slot, a direct current excitation winding is arranged in each stator slot of every two stator poles, the polarities of adjacent direct current excitation windings are opposite, and the direct current excitation windings are connected in series. The three-phase electro-magnetic doubly salient motor disclosed by the invention has a symmetrical structure, each phase of magnetic flux linkage is symmetrical, and the voltage fluctuation and the torque ripple of the motor are reduced, so that the current is more balanced.
Description
Technical Field
The invention relates to the technical field of motor body design, in particular to a three-phase symmetrical 12k/8k electro-magnetic doubly salient motor.
Background
China is a country with large energy consumption, and the improvement of the motor efficiency has great significance to energy saving, so that the variable reluctance motor is produced at the same time. An electro-magnetic doubly salient motor is one of variable reluctance motors. The rotor of the electro-magnetic doubly salient motor is simple in structure, free of windings and permanent magnets, physically and electromagnetically independent in each phase of windings on the stator, strong in high-speed running capacity, simple in structure, high in power density, high in reliability, flexible in control mode and the like, and has wide application prospects in the fields of aerospace, wind power generation and the like.
The traditional three-phase electro-magnetic doubly salient motor usually adopts a 6k/4 k-pole parallel tooth structure (k is a positive integer), and the change rate of each phase of flux linkage is different due to the fact that magnetic circuits of all phases are inconsistent, so that the symmetry of back electromotive force is poor. When the motor is used as a generator, voltage pulsation is large, and when the motor is used as a motor, the problems of large torque pulsation and large operation noise exist, and further the performance of the motor is reduced.
Disclosure of Invention
In order to solve the problems, the invention discloses a three-phase symmetric 12k/8k electrically-excited doubly-salient motor, which solves the problems of large torque ripple, large voltage fluctuation, unbalanced current and the like caused by asymmetric flux linkages of each phase.
A three-phase symmetric 12k/8k electro-magnetic doubly salient motor comprises a stator, a rotor, an armature winding and a direct-current excitation winding, wherein the stator and the rotor are both in a salient tooth slot structure, the stator comprises stator poles and stator slots, the rotor comprises rotor poles and rotor slots, grooves between adjacent stator poles are the stator slots, the number of the stator poles is 12N, the number of the rotor poles is 8N, and N is a positive integer; a, B, C three-phase armature windings are correspondingly arranged in each stator slot, direct-current exciting windings are arranged in the stator slots of every two stator poles, the polarities of the adjacent direct-current exciting windings are opposite, and the direct-current exciting windings are connected in series.
Preferably, each phase of armature winding of the three-phase armature winding is composed of 4N coils, N is a positive integer, the distance between each phase of armature winding and the direct-current excitation winding is the same, the magnetic circuit reluctance of the turn-chain is the same, and the magnetic flux path of each phase is consistent.
Preferably, the stator pole pitch of the stator is 2 times the stator pole arc length, and the rotor pole arc length is greater than or equal to the stator pole arc length.
Preferably, the connection phase sequence of the three-phase armature winding is A-B-C in the clockwise direction.
Preferably, when the doubly salient motor is used as a motor, the motor is controlled by a full-bridge inverter, and the three-phase armature windings are connected to the three-phase full-bridge inverter in a Y-connection manner.
Preferably, the dc field winding and the armature winding are both concentrated windings.
Preferably, the stator and the rotor are both stamped from silicon steel sheets.
Has the advantages that:
(1) the double salient pole motor disclosed by the invention has a stator and rotor salient pole tooth socket structure, and the rotor has no winding, so that the structure is simple and the operation is reliable;
(2) each excitation element of the doubly salient motor provided by the invention is wound across two stator poles, and the distance between each stator coil of each phase of armature winding and the excitation coil is the same, so that the magnetic flux paths of each phase of the motor are consistent, and the problem of three-phase flux linkage asymmetry caused by the structure that the magnetic circuits of each phase of the traditional three-phase electric excitation doubly salient motor are different in length is solved;
(3) the doubly salient motor disclosed by the invention solves the problems of asymmetric flux linkages of each phase of the motor and the like caused by asymmetric structure of the three-phase electro-magnetic doubly salient motor, reduces the voltage fluctuation and torque pulsation of the motor and enables the current to be more balanced.
Drawings
Fig. 1 is a schematic structural diagram of a three-term symmetric electro-magnetic doubly salient motor according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a three-phase electro-magnetic double salient motor with a conventional 12/8-pole structure;
FIG. 3 is a schematic magnetic circuit diagram of a three-phase electro-magnetic doubly salient motor with a conventional 12/8-pole structure;
FIG. 4 is a schematic magnetic circuit diagram of a three-phase symmetric 12k/8k electro-magnetic doubly-salient machine according to an embodiment of the invention;
FIG. 5 is a mutual inductance waveform diagram of armature windings and DC excitation windings of each phase of a conventional three-phase electro-magnetic doubly salient motor;
FIG. 6 is a diagram of mutual inductance waveforms of armature windings and DC field windings of each phase of a three-phase symmetrical 12k/8k electro-magnetic doubly salient motor in accordance with an embodiment of the present invention;
FIG. 7 is a three-phase flux linkage waveform diagram of a conventional three-phase electro-magnetic doubly salient motor;
FIG. 8 is a three-phase symmetrical 12k/8k doubly salient electro-magnetic machine three-phase flux linkage waveform of one embodiment of the present invention;
FIG. 9 is a connection diagram of a stator winding and a full-bridge controller of a three-phase symmetric 12k/8k electrically-excited doubly-salient motor according to an embodiment of the invention.
Reference numerals: 1-stator, 2-rotor, 3-A phase winding, 4-B phase winding, 5-C phase winding, 6-DC excitation winding, 7-stator slot and 8-stator pole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a 12N/8N three-phase symmetrical 12k/8k electro-magnetic doubly salient motor, wherein N is 1 in the embodiment. As shown in fig. 1, the 12/8-pole three-phase electrically-excited doubly salient motor includes a stator 1, a rotor 2, a direct-current field winding 6, and an armature winding including an a-phase winding 3, a B-phase winding 4, and a C-phase winding 5. The stator 1 and the rotor 2 are both salient pole tooth slot structures, the stator 1 comprises stator poles 8 and stator slots 7, the number of the stator poles 8 is 12, and a groove between every two adjacent stators 1 is the stator slot 7; the rotor 2 includes rotor poles and rotor slots, the number of the rotor poles being 8. Three-phase armature windings are distributed in each stator slot 7, and each phase of armature windings consists of 4 coils; direct current excitation windings 6 are arranged in stator slots of every two stator poles, the polarities of the adjacent direct current excitation windings 6 are opposite, and the direct current excitation windings 6 are connected in series. The connection phase sequence of the three-phase armature winding is A-B-C in the clockwise direction. The distance between each phase of armature winding and the direct current excitation winding is the same, and the magnetic circuit reluctance of the turn chain is the same, so that the magnetic flux path of each phase of the motor is consistent. The direct-current excitation winding 6 and the armature winding are both centralized windings. Stator 1 and rotor 2 are the punching press of silicon steel sheet and form, and the stator pole pitch of stator is 2 times of stator pole arc length, and the pole arc length of rotor is more than or equal to the pole arc length of stator.
As shown in fig. 2, which is a schematic structural diagram of a three-phase electro-magnetic doubly salient motor with a conventional 12/8-pole structure, a direct-current excitation winding is arranged in each stator slot of every three stator poles; as shown in fig. 3, it is a schematic magnetic circuit diagram of a three-phase electro-magnetic doubly salient motor with a conventional 12/8-pole structure; as shown in fig. 5, it is a mutual inductance waveform diagram of armature windings and dc excitation windings of each phase of the conventional three-phase electro-magnetic doubly salient motor; as shown in fig. 7, it is a three-phase flux linkage waveform diagram of a conventional three-phase electro-magnetic doubly salient motor. The traditional three-phase electric excitation doubly salient motor has short phase magnetic circuit close to the excitation coil, small magnetic resistance, long phase magnetic circuit far away from the excitation coil and large magnetic resistance. The mutual inductance of each phase armature winding and the direct current excitation winding is unequal, and the three-phase flux linkage is asymmetric, so that the problems of large torque pulsation, large voltage fluctuation, unbalanced current and the like of the motor are caused.
As shown in fig. 4, a schematic diagram of a magnetic circuit of a three-phase symmetric 12k/8k electro-magnetic doubly-salient motor of the present invention is shown, so that the distances between 4 coils of each phase winding of the motor of the present invention and an excitation element are the same, the magnetic flux paths of each phase of the motor are consistent, and the problem of asymmetric three-phase magnetic circuit of the traditional three-phase electro-magnetic doubly-salient motor is solved. As shown in fig. 6, which is a mutual inductance waveform diagram of each phase armature winding and dc excitation winding of the three-phase symmetric 12k/8k electro-magnetic doubly salient motor of the present invention, it can be seen that the armature winding and dc excitation winding of the doubly salient motor disclosed in the present invention are completely symmetric in mutual inductance. As shown in fig. 8, which is a three-phase flux linkage waveform diagram of a three-phase symmetric 12k/8k doubly salient electro-magnetic motor of the present invention, it can be seen that the three-phase symmetric 12k/8k doubly salient electro-magnetic motor of the present invention has completely symmetric flux linkages.
And A, B, C three-phase armature windings are connected to a three-phase full-bridge converter in a Y-shaped connection mode to form a three-phase symmetrical 12k/8k electro-magnetic doubly salient motor main control circuit. FIG. 9 shows a connection diagram of a stator winding and a full-bridge controller of a three-phase symmetric 12k/8k electro-magnetic doubly salient motor of the invention.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a 12k 8k electricity excitation doubly salient pole machine of three-phase symmetry, includes stator, rotor, armature winding and direct current excitation winding, its characterized in that: the stator and the rotor are coaxially arranged and are of a salient-pole tooth slot structure, the stator comprises stator poles and stator slots, the rotor comprises rotor poles and rotor slots, grooves between adjacent stator poles are the stator slots, the number of the stator poles is 12N, the number of the rotor poles is 8N, and N is a positive integer; a, B, C three-phase armature windings are correspondingly arranged in each stator slot, direct-current exciting windings are arranged in the stator slots of every two stator poles, the polarities of the adjacent direct-current exciting windings are opposite, and the direct-current exciting windings are connected in series.
2. The three-phase symmetric 12k/8k electro-magnetically doubly salient machine of claim 1, wherein: each phase of armature winding of the three-phase armature winding is composed of 4N coils, N is a positive integer, the distance between each phase of armature winding and the direct-current excitation winding is the same, the magnetic circuit reluctance of the turn-chain is the same, and the magnetic flux path of each phase is the same.
3. The three-phase symmetric 12k/8k electro-magnetically doubly salient machine of claim 2, wherein: the stator pole pitch of the stator is 2 times of the length of a stator pole arc, and the length of the rotor pole arc is larger than or equal to the length of the stator pole arc.
4. The three-phase symmetric 12k/8k electro-magnetically doubly salient machine of claim 3, wherein: and the connection phase sequence of the three-phase armature winding is A-B-C in the clockwise direction.
5. The three-phase symmetric 12k/8k electro-magnetically doubly salient machine of claim 4, wherein: when the doubly salient motor is used as a motor, the doubly salient motor is controlled by a full-bridge converter, and the three-phase armature winding is connected with the three-phase full-bridge converter in a Y-shaped connection mode.
6. The three-phase symmetric 12k/8k electro-magnetically doubly salient machine of claim 5, wherein: the direct-current excitation winding and the armature winding are both centralized windings.
7. The three-phase symmetric 12k/8k electro-magnetically doubly salient machine of claim 6, wherein: the stator and the rotor are both formed by punching silicon steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110994174.4A CN113809843A (en) | 2021-08-27 | 2021-08-27 | Three-phase symmetrical 12k/8k electro-magnetic doubly salient motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110994174.4A CN113809843A (en) | 2021-08-27 | 2021-08-27 | Three-phase symmetrical 12k/8k electro-magnetic doubly salient motor |
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| CN113809843A true CN113809843A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110994174.4A Pending CN113809843A (en) | 2021-08-27 | 2021-08-27 | Three-phase symmetrical 12k/8k electro-magnetic doubly salient motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114553076A (en) * | 2022-02-07 | 2022-05-27 | 苏州达思灵新能源科技有限公司 | Micro-torque fluctuation doubly salient direct-current excitation generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3012950A1 (en) * | 2014-10-22 | 2016-04-27 | SiEVA d.o.o., PE Lipnica | Three phase axial stepper motor with a direct current excitation |
| CN106787284A (en) * | 2017-02-13 | 2017-05-31 | 南京航空航天大学 | A kind of Modular electrical excitation biconvex electrode electric machine |
| CN106787557A (en) * | 2017-03-20 | 2017-05-31 | 山东理工大学 | A kind of concentratred winding electric excitation biconvex electrode electric machine |
| CN110365131A (en) * | 2019-06-28 | 2019-10-22 | 南京航空航天大学 | A kind of electric excitation biconvex electrode electric machine of three-phase symmetrical |
| CN112542903A (en) * | 2020-11-13 | 2021-03-23 | 南京航空航天大学 | Three-phase hybrid excitation doubly salient motor structure |
-
2021
- 2021-08-27 CN CN202110994174.4A patent/CN113809843A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3012950A1 (en) * | 2014-10-22 | 2016-04-27 | SiEVA d.o.o., PE Lipnica | Three phase axial stepper motor with a direct current excitation |
| CN106787284A (en) * | 2017-02-13 | 2017-05-31 | 南京航空航天大学 | A kind of Modular electrical excitation biconvex electrode electric machine |
| CN106787557A (en) * | 2017-03-20 | 2017-05-31 | 山东理工大学 | A kind of concentratred winding electric excitation biconvex electrode electric machine |
| CN110365131A (en) * | 2019-06-28 | 2019-10-22 | 南京航空航天大学 | A kind of electric excitation biconvex electrode electric machine of three-phase symmetrical |
| CN112542903A (en) * | 2020-11-13 | 2021-03-23 | 南京航空航天大学 | Three-phase hybrid excitation doubly salient motor structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114553076A (en) * | 2022-02-07 | 2022-05-27 | 苏州达思灵新能源科技有限公司 | Micro-torque fluctuation doubly salient direct-current excitation generator |
| CN114553076B (en) * | 2022-02-07 | 2023-11-10 | 苏州达思灵新能源科技有限公司 | Micro-torque fluctuation doubly salient direct current excitation generator |
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Application publication date: 20211217 |
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| RJ01 | Rejection of invention patent application after publication |