CN108429421B - Mixed excitation motor for new energy automobile - Google Patents
Mixed excitation motor for new energy automobile Download PDFInfo
- Publication number
- CN108429421B CN108429421B CN201810529473.9A CN201810529473A CN108429421B CN 108429421 B CN108429421 B CN 108429421B CN 201810529473 A CN201810529473 A CN 201810529473A CN 108429421 B CN108429421 B CN 108429421B
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- Prior art keywords
- stator
- stator core
- magnetic conduction
- core
- magnetic
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- 230000005284 excitation Effects 0.000 title claims abstract description 39
- 230000005291 magnetic effect Effects 0.000 claims abstract description 95
- 238000004804 winding Methods 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 2
- 239000011162 core material Substances 0.000 description 48
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/10—Synchronous motors for multi-phase current
- H02K19/12—Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention discloses a hybrid excitation motor for a new energy automobile, which comprises a shell, a rotor core and a stator core, wherein the rotor core and the stator core are arranged in the shell, the stator core is divided into an upper part and a lower part, a three-phase winding is wound through the upper stator core and the lower stator core, and a magnetic conduction bracket around which a direct current excitation winding is wound is arranged between the upper stator core and the lower stator core. The invention is applied to the mixed excitation motor in the field of new energy driving motors, and has the characteristics of good speed regulation performance, strong anti-demagnetization capability, high material utilization rate and high efficiency of the mixed excitation motor, and the magnetic conduction bracket arranged on the stator can effectively reduce the complexity of the stator structure of the mixed excitation motor and reduce the processing difficulty of a stator core; the mechanical strength of the magnetic conduction bracket is superior to that of the stator core, so that the risk of deformation of the stator assembly during winding of the three-phase winding can be effectively reduced; and when the outer diameter of the magnetic conduction bracket is larger than the outer diameter of the stator, the winding space of the exciting winding can be effectively increased, so that the ratio of electric excitation is increased.
Description
Technical Field
The invention relates to a hybrid excitation motor, in particular to a hybrid excitation motor for a new energy automobile, and belongs to the technical field of motors.
Background
The current new energy automobile driving motors are generally three types of permanent magnet synchronous motors, asynchronous motors and switched reluctance motors. Because the demand of service environment is higher, the requirement on the driving motor of the automobile is higher, the driving motor needs to meet the requirements of high instantaneous power, strong overload capacity, good acceleration performance, wide speed regulation range, large moment and high-speed running of the automobile, and the efficiency is optimized in the whole running range so as to improve the endurance mileage, and the driving motor has long service life, high power density and low noise.
The permanent magnet synchronous motor can meet most of the requirements, but because the excitation magnetic field of the permanent magnet synchronous motor is a permanent magnet, the magnetic field of the permanent magnet is difficult to change, and the torque is higher and the current is high during low-speed starting, so that the heat productivity of the motor is high; when the automobile runs at high speed, the control is complex, the weak magnetic energy is poor, so that the efficiency of the high-speed running is low or the speed of the automobile is reduced; and the permanent magnet synchronous motor using the rare earth permanent magnet has higher cost, the problem of demagnetization of the permanent magnet exists at high temperature, and the reliability of the product is reduced.
The axial/radial magnetic circuit hybrid excitation synchronous motor can effectively solve the problems, but the motor of the type generally places the excitation winding after directly slotting the outer ring of the stator. The cross-sectional area of the slot needs to be large enough to increase the space in which the field winding is placed. However, since the stator core is formed by laminating silicon steel sheets, if the cross-sectional area of the slot is too large, the strength of the stator core is insufficient, and the core is easy to deform when a three-phase winding is wound; and the length-diameter ratio of the hybrid excitation motor needs to be made smaller, namely the motor is made to be short and fat, and if the slot for placing the excitation winding is too wide, the motor can be axially increased, so that the optimal characteristics of the motor are not beneficial to being exerted.
Disclosure of Invention
The invention provides a hybrid excitation motor for a new energy automobile aiming at the problems in the prior art.
The technical scheme of the invention is as follows:
The utility model provides a hybrid excitation motor for new energy automobile, includes the casing and sets up rotor core and stator core in the casing, stator core divide into upper and lower two parts, and three-phase winding winds through upper and lower stator core, sets up the magnetic conduction support around having direct current excitation winding between upper and lower two parts stator core.
As a further improvement of the invention, the inner diameter of the magnetic conduction bracket is the same as the diameter of the bottom circle of the stator slot.
As a further improvement of the invention, the outer diameter of the magnetic conductive bracket is equal to the outer diameter of the stator.
As a further improvement of the invention, the outer diameter of the magnetic conductive bracket is larger than the outer diameter of the stator.
As a further improvement of the invention, the upper and lower stator cores after winding are connected through the stator magnetic ring, and the stator magnetic ring is assembled with the casing to form the stator assembly.
As a further development of the invention, the material of the housing is provided as a magnetically conductive material, which is directly assembled with the stator core.
As a further improvement of the invention, the upper and lower parts of the stator iron core after winding are connected through the stator magnetic ring, the stator magnetic ring is divided into an upper part and a lower part to be assembled with the stator iron core, and the stator magnetic ring is assembled with the shell to form the stator assembly.
As a further improvement of the invention, an annular magnetic conducting ring which is made of the same material as the stator magnetic conducting ring is arranged in the magnetic conducting bracket.
As a further improvement of the invention, the rotor is divided into an upper part and a lower part, an N-pole permanent magnet and an S-pole permanent magnet are arranged on the rotor, and the N-pole permanent magnet and the S-pole permanent magnet are respectively arranged on the upper part and the lower part of the rotor.
As a further improvement of the present invention, permanent magnets of the same polarity are arranged alternately with the core poles formed by the rotor core.
The beneficial effects of the invention are as follows:
according to the hybrid excitation motor, the magnetic conduction bracket is arranged in the stator, and the excitation winding is wound on the inner wall of the magnetic conduction bracket, so that the complexity of the stator structure of the hybrid excitation motor can be effectively reduced, and the processing difficulty of a stator core is reduced; the mechanical strength of the magnetic conduction bracket is superior to that of the stator core, so that the strength of the stator of the hybrid excitation motor is effectively improved, and the risk of deformation of the stator assembly during winding of the three-phase winding can be effectively reduced; when the outer diameter of the magnetic conduction bracket is larger than the outer diameter of the stator, the winding space of the exciting winding can be effectively increased, so that the ratio of electric excitation is increased; the stator is arranged in a split mode, and machining difficulty of the stator core is effectively reduced.
Drawings
Fig. 1 is a cross-sectional view of the structure of the present invention when the outer diameter of the magnetic conductive bracket is the same as the outer diameter of the stator core.
Fig. 2 is a cross-sectional view of the structure of the present invention when the outer diameter of the magnetic conductive bracket is larger than the outer diameter of the stator core.
Fig. 3 is an isometric view of the motor structure of the present invention.
Fig. 4 is a magnetic circuit diagram when the outer diameter of the magnetic conduction bracket is equal to the outer diameter of the stator.
Fig. 5 is a magnetic circuit diagram when the outer diameter of the magnetic conduction bracket is larger than the outer diameter of the stator.
The marks in the figure: 1-bearing, 2-end cover, 3-casing, 4-N pole permanent magnet, 5-excitation winding, 6-magnetic conduction support, 6-1-inner circle, 6-2-upper support, 6-3-lower support, 7-ferromagnetic pole (N), 8-rotor shaft, 9-ferromagnetic pole (S), 10-three-phase AC winding, 11-S pole permanent magnet, 12-stator core, 13-stator magnetic conduction ring, 14, rotor core, 15-annular magnetic conduction ring.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The invention provides a mixed excitation motor applied to the field of new energy driving motors, which has the characteristics of good speed regulation performance, strong anti-demagnetization capability, high material utilization rate and high efficiency of the mixed excitation motor, and the magnetic conduction bracket arranged on the stator can effectively reduce the complexity of the stator structure of the mixed excitation motor and reduce the processing difficulty of a stator core; the mechanical strength of the magnetic conduction bracket is superior to that of the stator core, so that the risk of deformation of the stator assembly during winding of the three-phase winding can be effectively reduced; and when the outer diameter of the magnetic conduction bracket is larger than the outer diameter of the stator, the winding space of the exciting winding can be effectively increased, so that the ratio of electric excitation is increased.
Example 1
As shown in fig. 1 and 3, the stator core 12 is divided into an upper part and a lower part, a magnetic conduction bracket 6 wound with a direct current excitation winding 5 is placed between the upper part and the lower part of the stator core, the three-phase winding 10 is wound through the upper part and the lower part of the stator core, and after winding, the three-phase winding is connected through a stator magnetic conduction ring 13, and the stator magnetic conduction ring 13 is assembled with the casing 3 to form a stator assembly. Correspondingly, the rotor is also divided into two parts, the N-pole permanent magnet 4 and the S-pole permanent magnet 11 are respectively placed on the upper and lower parts of the rotor, and as a preferable structure of this embodiment, two permanent magnets with the same polarity are laminated by punching sheets, and the rotor core pole (ferromagnetic pole (N) 7 or ferromagnetic pole (S) 9) integrated with the rotor core 14 can also be made of soft magnetic material with better magnetic conductivity, namely: permanent magnets with the same polarity are staggered with iron core poles 7 formed by the iron cores. It should be noted that, the rotor structure in the present invention is not limited to the above examples in the present embodiment, and any rotor structure in the prior art that can cooperate with the stator core in the present invention to realize the hybrid excitation function should be included in the protection scope of the present invention. The rotor core 14 and the rotating shaft 8 are assembled to form a rotor assembly, the front end and the rear end of the rotating shaft 8 are assembled with the bearing 1 and then put into the assembled stator assembly to be matched with the end cover 2, so that the hybrid motor is formed.
In this embodiment, the outer diameter of the magnetic conductive bracket 6 is equal to the outer diameter of the stator core 12, and as shown in fig. 1, the stator magnetic conductive ring 13 is a cylindrical whole and assembled with the stator core 12. As shown in fig. 4, when the dc exciting winding 5 is energized, the generated magnetic flux enters the inner ring 6-1 of the magnetic conductive bracket 6, passes through the teeth and the yoke of the stator core 12, enters the stator magnetic ring 13, passes through the yoke and the teeth of the stator core 12, and returns to the inner ring 6-1 of the magnetic conductive bracket 6 to form a magnetic circuit. As a preferable structure of this embodiment, the inner diameter of the magnetic conductive bracket 6 is the same as the diameter of the stator groove bottom circle.
In this embodiment, when the outer diameter of the magnetic conduction bracket is the same as the outer diameter of the stator core, the stator magnetic conduction ring 13 can be omitted, and the material of the casing 3 is set to be magnetic conduction material, so that the casing 3 plays an axial magnetic conduction role and is directly assembled with the stator core.
Example two
The structure of the hybrid excitation motor of this embodiment is basically the same as that of the first embodiment, with the main difference that the outer diameter of the magnetically permeable support 6 is larger than that of the stator core 12. The following will mainly describe the part that is different from the first embodiment, and the other parts will not be described in detail.
As shown in fig. 2 and 5, the outer diameter of the magnetic conduction bracket 6 is larger than the outer diameter of the stator core 12, and an annular magnetic conduction ring 15 is placed in the magnetic conduction bracket 6, and the material is consistent with that of the stator magnetic conduction ring 13. The stator magnetic conduction ring 13 is assembled with the stator core 12 in an upper and lower two parts, so that magnetic flux generated by the direct current excitation winding 5 firstly enters the inner ring 6-1 of the magnetic conduction bracket 6, passes through the tooth part and the yoke part of the stator core 12, enters the stator magnetic conduction ring 13, then enters the upper bracket 6-2 (or the lower bracket 6-3) of the magnetic conduction bracket 6, then enters the stator magnetic conduction ring 13 through the lower bracket 6-3 (or the upper bracket 6-2), and then returns to the inner ring 6-1 of the magnetic conduction bracket 6 through the yoke part and the tooth part of the stator core 12 to form a magnetic loop.
In this embodiment, when the outer diameter of the magnetic conduction support is larger than that of the stator core, the annular magnetic conduction ring 15 can be added and placed in the magnetic conduction support 6, then the magnetic conduction support is assembled with the magnetic conduction ring divided into two parts, and finally the magnetic conduction support is assembled with the casing 3, so that the winding space of the excitation winding can be effectively increased, and the weak magnetic energy capacity can be improved.
In summary, the invention provides a hybrid excitation driving motor for a new energy automobile, wherein a stator is formed by two parts in the same axial direction, a magnetic conduction bracket for placing an excitation winding is arranged between an upper part stator and a lower part stator, the magnetic conduction bracket has mechanical strength superior to that of a stator core material and has better magnetic conduction performance, the inner diameter of the magnetic conduction bracket is the same as the diameter of a groove bottom circle of the stator core, and the outer diameter of the magnetic conduction bracket can be set to be larger than or equal to the outer diameter of the stator core according to the requirement of the excitation winding; the corresponding rotor is also divided into two parts in the axial direction, the N pole and the S pole of the permanent magnetic pole with the same size are respectively arranged on the upper part and the lower part of the rotor and are arranged in a staggered way in the radial direction, and meanwhile, the iron pole with the same length as the permanent magnetic pole on the upper part and the lower part of the rotor is arranged in a staggered way with the permanent magnetic pole in the radial direction. The magnetic conduction bracket arranged between the upper part and the lower part of the stator replaces a mode of directly grooving the middle of the stator core, so that the strength of the stator can be effectively improved, and the processing difficulty of the stator is reduced; when the outer diameter of the magnetic conduction bracket is the same as that of the stator core, the stator magnetic conduction ring is integrated, and the stator magnetic conduction ring and the stator core are assembled to form a mixed excitation motor directly after being assembled with the casing; when the outer diameter of the magnetic conduction bracket is larger than that of the stator core, the magnetic conduction ring can be axially arranged into an upper part and a lower part, and then is assembled with the stator core and then placed in the shell, so that the winding space of the exciting winding can be effectively increased, and the electric excitation proportion is increased.
Claims (6)
1. A hybrid excitation motor for new energy automobile, includes casing and rotor core and stator core that sets up in the casing, its characterized in that: the stator core is divided into an upper part and a lower part, the three-phase winding is wound through the upper stator core and the lower stator core, a magnetic conduction bracket around which a direct current excitation winding is wound is arranged between the upper stator core and the lower stator core, and the outer diameter of the magnetic conduction bracket is larger than that of the stator; the upper part and the lower part of the wound stator iron core are connected through a stator magnetic ring, and an annular magnetic ring which is made of the same material as the stator magnetic ring is arranged in the magnetic support; the rotor is divided into an upper part and a lower part, an N-pole permanent magnet and an S-pole permanent magnet are arranged on the rotor, and the N-pole permanent magnet and the S-pole permanent magnet are respectively arranged on the upper part and the lower part of the rotor.
2. The hybrid-excitation motor for a new energy automobile according to claim 1, wherein: the inner diameter of the magnetic conduction bracket is the same as the diameter of the bottom circle of the stator groove.
3. The hybrid-excitation motor for a new energy automobile according to claim 1, wherein: the stator magnetic conduction ring is assembled with the machine shell to form a stator assembly.
4. The hybrid-excitation motor for a new energy automobile according to claim 1, wherein: the shell is made of magnetic conductive material and is directly assembled with the stator core.
5. The hybrid-excitation motor for a new energy automobile according to claim 1, wherein: the stator magnetic conduction ring is assembled with the stator core by being divided into an upper part and a lower part, and the stator magnetic conduction ring is assembled with the machine shell to form a stator assembly.
6. The hybrid-excitation motor for a new energy automobile according to claim 1, wherein: permanent magnets with the same polarity are staggered with iron core poles formed by the rotor iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529473.9A CN108429421B (en) | 2018-05-29 | 2018-05-29 | Mixed excitation motor for new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529473.9A CN108429421B (en) | 2018-05-29 | 2018-05-29 | Mixed excitation motor for new energy automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108429421A CN108429421A (en) | 2018-08-21 |
| CN108429421B true CN108429421B (en) | 2024-04-30 |
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ID=63164406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810529473.9A Active CN108429421B (en) | 2018-05-29 | 2018-05-29 | Mixed excitation motor for new energy automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108429421B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465407A (en) * | 2022-03-29 | 2022-05-10 | 宁波朝一电子有限公司 | Novel fan motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103703660A (en) * | 2010-12-21 | 2014-04-02 | 新特太奇公司 | Rotating electrical machine with so-called double homopolar structure |
| CN106655553A (en) * | 2017-03-15 | 2017-05-10 | 东南大学 | Motor with composite structure |
| CN106981937A (en) * | 2017-03-10 | 2017-07-25 | 东南大学 | A kind of rotor misconstruction motor |
| CN208174507U (en) * | 2018-05-29 | 2018-11-30 | 珠海格力电器股份有限公司 | Hybrid excitation motor for new energy automobile |
-
2018
- 2018-05-29 CN CN201810529473.9A patent/CN108429421B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103703660A (en) * | 2010-12-21 | 2014-04-02 | 新特太奇公司 | Rotating electrical machine with so-called double homopolar structure |
| CN106981937A (en) * | 2017-03-10 | 2017-07-25 | 东南大学 | A kind of rotor misconstruction motor |
| CN106655553A (en) * | 2017-03-15 | 2017-05-10 | 东南大学 | Motor with composite structure |
| CN208174507U (en) * | 2018-05-29 | 2018-11-30 | 珠海格力电器股份有限公司 | Hybrid excitation motor for new energy automobile |
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| Publication number | Publication date |
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| CN108429421A (en) | 2018-08-21 |
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