CN113904517A - Direct-current excitation type magnetic field modulation motor - Google Patents
Direct-current excitation type magnetic field modulation motor Download PDFInfo
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- CN113904517A CN113904517A CN202111295324.9A CN202111295324A CN113904517A CN 113904517 A CN113904517 A CN 113904517A CN 202111295324 A CN202111295324 A CN 202111295324A CN 113904517 A CN113904517 A CN 113904517A
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 65
- 230000005284 excitation Effects 0.000 title claims abstract description 62
- 238000004804 winding Methods 0.000 claims abstract description 49
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 5
- 230000005347 demagnetization Effects 0.000 abstract description 4
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 4
- 150000002910 rare earth metals Chemical class 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
-
- 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
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- 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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/26—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings
-
- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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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
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention provides a direct current excitation type magnetic field modulation motor, which comprises a motor stator and a motor rotor, wherein the motor stator comprises: the stator comprises a stator core, an armature winding and an excitation winding; the motor rotor includes: a rotor core and a motor shaft; the stator iron core comprises a stator open slot, stator teeth and a stator yoke part; the armature winding is wound on the top end of the stator tooth in a concentrated winding arrangement mode, and the excitation winding is wound on the bottom end of the stator tooth; rotor core includes rotor salient pole tooth, rotor yoke portion, rotor core is provided with evenly distributed on the circumferencial direction rotor salient pole tooth, rotor salient pole tooth are connected by the rotor yoke portion of ring shape. The invention can solve the problem of the demagnetization risk of the permanent magnet caused by the excitation of the permanent magnet in the existing magnetic field modulation motor, reduce the high cost caused by adopting a large amount of rare earth permanent magnets, and change the excitation magnetic field of the motor by adjusting the excitation current.
Description
Technical Field
The invention relates to the technical field of modulation motors, in particular to a direct-current excitation type magnetic field modulation motor.
Background
In recent years, new energy vehicles represented by pure electric vehicles are rapidly developed, wherein a traditional electric drive system mainly adopts a mode of combining a motor and a matched mechanical speed reducer, however, the mechanical structure of the drive system is complex and the mass of the drive system is large, and meanwhile, as structures such as gears need to be mutually contacted and meshed to carry out transmission of power, the mechanical wear is increased, the noise is increased, and the efficiency is reduced.
Aiming at the problems, a magnetic gear based on a magnetic field modulation effect is adopted by a student to replace a mechanical speed reducer to be combined with a motor for transmission, so that abrasion caused by mechanical contact in a transmission system is avoided; then, the magnetic gear and the traditional permanent magnet synchronous motor are further designed into a whole in structure, so that the magnetic field modulation motor is formed.
The magnetic field modulation motor has the characteristics of speed reduction and torque increase, so that a complex and heavy transmission system is omitted, the magnetic field modulation motor can be suitable for various direct-drive working conditions, and attention of various scholars is paid.
Currently, many field modulation motors are mainly structurally composed of an excitation unit, an armature winding, and a field modulation device. The excitation unit generally adopts a permanent magnet for excitation to form an excitation magnetic field, alternating current is introduced into an armature winding to form a rotating magnetic field, and the rotating magnetic field is modulated by a magnetic field modulation device to form a magnetic field with the same pole pair number as the excitation magnetic field, so that the rotating magnetic field is coupled with the excitation magnetic field to generate torque. When the armature winding is used as the input end, one of the excitation unit and the magnetic field modulation device formed by the permanent magnet can be fixed between the excitation unit and the magnetic field modulation device, and the other can be used as the mechanical output end. Because the magnetic field modulation device changes the pole pair number of the rotating magnetic field, the variable speed transmission similar to the traditional gear can be realized.
The magnetic field modulation motor is excited by using the permanent magnet, the risk of demagnetization of the permanent magnet exists in the running process of the motor, and the size of an excitation magnetic field generated by the permanent magnet is fixed and unadjustable; meanwhile, the production and manufacture of the high-performance permanent magnet depend on rare earth materials, and the cost is high.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a dc excitation type magnetic field modulation motor, which solves the risk of demagnetization of a permanent magnet caused by excitation of the permanent magnet in the existing magnetic field modulation motor, reduces high cost caused by using a large amount of rare earth permanent magnets, and can change the excitation magnetic field of the motor by adjusting the excitation current.
In order to achieve the above object, the present invention provides a dc excitation type magnetic field modulation motor, including a motor stator and a motor rotor, wherein the motor stator includes: the stator comprises a stator core, an armature winding and an excitation winding; the motor rotor includes: a rotor core and a motor shaft; the stator core comprises stator open slots, stator teeth and a stator yoke part, the stator open slots are uniformly distributed in the circumferential direction of the stator core, one stator tooth is formed between every two adjacent stator open slots, and the stator teeth are connected by the annular stator yoke part; the armature winding is wound on the top ends of the stator teeth in a concentrated winding arrangement mode, and two sides of the armature winding are respectively arranged on the inner layers of the adjacent two stator open grooves; the excitation winding is wound at the bottom ends of the stator teeth, and two sides of the excitation winding are respectively arranged on the outer layers of the two adjacent stator open slots; rotor core includes rotor salient pole tooth, rotor yoke portion, rotor core is provided with evenly distributed on the circumferencial direction rotor salient pole tooth, adjacent two be air or other high magnetic resistance material between the rotor salient pole tooth, the salient pole tooth plays the modulation effect to magnetic field as the modulation tooth, just the rotor salient pole tooth is connected by the rotor yoke portion of annular shape.
Preferably, a three-phase alternating current is passed through the armature winding to form a rotating magnetic field.
Preferably, direct current excitation currents with opposite directions and adjustable magnitudes are introduced into the adjacent excitation windings to form N, S excitation magnetic fields with alternately arranged poles.
Further, the rotor salient pole teeth are fan-shaped teeth, rectangular teeth or trapezoidal teeth.
Optionally, the motor stator is arranged outside the motor rotor, and the motor stator and the motor rotor are coaxially sleeved with each other with a motor air gap therebetween; and the motor rotating shaft is coaxially and fixedly connected with the rotor yoke.
Therefore, the direct-current excitation type magnetic field modulation motor at least has the following beneficial effects:
1. the magnetic field modulation motor is excited by using direct current, and the excitation magnetic field can be adjusted by means of changing the magnitude of the direct current;
2. the magnetic field modulation motor does not need to use a permanent magnet, so that the reliability reduction of the motor caused by demagnetization of the permanent magnet in the operation process of the motor is avoided;
3. the magnetic field modulation motor does not depend on rare earth materials, and the production cost of the motor is reduced.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic sectional view of a dc excitation type field modulation motor of the present invention, in which a field winding and an armature winding are wound together around stator teeth;
fig. 2 is a schematic sectional structure view of a dc excitation type magnetic field modulation motor of the present invention, in which armature windings are wound around stator teeth and field windings are wound around a stator yoke portion arranged at the bottom of an open slot of the stator;
fig. 3 is a schematic tooth profile diagram of a rotor salient pole tooth of one embodiment of the dc excitation type field modulation motor of the present invention.
Wherein: 1-stator iron core, 1.1-stator yoke, 1.2-stator teeth, 1.3-stator open slot, 1.4-stator yoke wire slot, 2-armature winding, 3-excitation winding, 4-rotor iron core, 4.1-rotor salient pole teeth, 4.2-rotor yoke and 5-motor rotating shaft.
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 from the embodiments of the present invention by a person skilled in the art without any creative effort, should be included in the protection scope of the present invention.
The dc excitation type field modulation motor of the present invention will be described in detail with reference to fig. 1 to 3.
Example 1
As shown in fig. 1, the dc excitation type field modulation motor of the present invention includes: a motor stator, a motor rotor; wherein the motor stator includes: stator core 1, armature winding 2 and excitation winding 3, electric motor rotor includes: rotor core 4 and motor shaft 5. The stator core 1 and the rotor core 4 are made of ferromagnetic materials.
The armature winding 2 is wound on the top ends of the 12 stator teeth 1.2 in a concentrated winding arrangement mode, and two sides of the armature winding 2 are respectively arranged on the inner layers of the two adjacent stator open grooves 1.3. Three-phase alternating current is introduced into the armature winding 2 to form a rotating magnetic field.
The excitation winding 3 is wound at the bottom ends of the 12 stator teeth 1.2, and two sides of the excitation winding 3 are respectively arranged at the outer layers of the two adjacent stator open slots 1.3.
Direct current exciting currents with opposite directions and adjustable magnitudes are led into the adjacent exciting windings 3 to form N, S exciting magnetic fields with alternately arranged poles. The armature winding 2 and the excitation winding 3 are wound by flat wires.
The motor stator is arranged outside the motor rotor, the motor stator and the motor rotor are coaxially sleeved, a motor air gap is arranged between the motor stator and the motor rotor, and the motor rotating shaft 5 is coaxially and fixedly connected with the rotor yoke part 4.2.
Pole pair number P of rotating magnetic fieldaMagnetic pole pair number P of excitation magnetic fieldeThe number P of salient pole teeth of the rotorfSatisfy the relation:
Pa＝|Pe±Pf|
the working principle of the motor will now be explained with reference to fig. 1 as an example:
three-phase alternating current i is introduced into the armature winding 2,
the A phase expression is
The expression of the B phase is
The C phase expression is
The armature winding 2 wound at the top end of the 12 stator teeth 1.2 forms a magnetic pole pair number P under three-phase currentaA rotating magnetic field of 4. The excitation windings 3 wound on the adjacent stator teeth 1.2 are introduced with direct current excitation currents with opposite directions and the same magnitude to form N, S polesAn aligned excitation magnetic field. The excitation winding 3 wound at the bottom of the 12 stator teeth 1.2 forms a magnetic pole pair number P under direct current excitation currenteAn excitation field of 6. The size of the excitation magnetic field can be adjusted by changing the size of the direct current excitation current.
Number of pole pairs PeExcitation field and pole pair number P of 6aUnder the modulation action of 10 rotor salient pole teeth 4.1, a modulated excitation magnetic field and a modulated rotating magnetic field with partially same magnetic pole pair number components are generated by the rotating magnetic field of 4, and the magnetic fields with the same magnetic pole pair number are mutually coupled to generate torque so as to drive the motor to rotate.
The speed of the motor rotor is controlled by the current frequency omega of the three-phase alternating current i introduced into the armature winding 2.
Example 2
As shown in fig. 2, a slot is formed in a stator yoke 1.1 at the bottom of a stator opening slot 1.3 to form a stator yoke slot 1.4, an excitation winding 3 is wound around the stator yoke 1.1 at the bottom of the stator opening slot 1.3, and two sides of the excitation winding 3 are respectively placed in the stator yoke slot 1.4.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111295324.9A CN113904517A (en) | 2021-11-03 | 2021-11-03 | Direct-current excitation type magnetic field modulation motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111295324.9A CN113904517A (en) | 2021-11-03 | 2021-11-03 | Direct-current excitation type magnetic field modulation motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113904517A true CN113904517A (en) | 2022-01-07 |
Family
ID=79028337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111295324.9A Pending CN113904517A (en) | 2021-11-03 | 2021-11-03 | Direct-current excitation type magnetic field modulation motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113904517A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117277625A (en) * | 2022-09-20 | 2023-12-22 | 罗灿 | Two-component double-armature adjustable magnet motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001013511A1 (en) * | 1999-08-17 | 2001-02-22 | Black & Decker Inc. | Electrical machines |
| CN101291095A (en) * | 2008-06-12 | 2008-10-22 | 哈尔滨工业大学 | Hybrid Switched Reluctance Motor |
| CN106451979A (en) * | 2015-08-05 | 2017-02-22 | 香港理工大学 | Field Modulated Hybrid Excitation Motor |
| CN106655548A (en) * | 2016-11-16 | 2017-05-10 | 中国石油大学(华东) | Stator excitation type high-temperature superconducting field modulation motor |
| CN113489271A (en) * | 2021-06-21 | 2021-10-08 | 南京航空航天大学 | AC-DC hybrid excitation type motor power generation system |
-
2021
- 2021-11-03 CN CN202111295324.9A patent/CN113904517A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001013511A1 (en) * | 1999-08-17 | 2001-02-22 | Black & Decker Inc. | Electrical machines |
| CN101291095A (en) * | 2008-06-12 | 2008-10-22 | 哈尔滨工业大学 | Hybrid Switched Reluctance Motor |
| CN106451979A (en) * | 2015-08-05 | 2017-02-22 | 香港理工大学 | Field Modulated Hybrid Excitation Motor |
| CN106655548A (en) * | 2016-11-16 | 2017-05-10 | 中国石油大学(华东) | Stator excitation type high-temperature superconducting field modulation motor |
| CN113489271A (en) * | 2021-06-21 | 2021-10-08 | 南京航空航天大学 | AC-DC hybrid excitation type motor power generation system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117277625A (en) * | 2022-09-20 | 2023-12-22 | 罗灿 | Two-component double-armature adjustable magnet motor |
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Application publication date: 20220107 |
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