CN117081289A - Rotor structure of hybrid excitation motor - Google Patents
Rotor structure of hybrid excitation motor Download PDFInfo
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- CN117081289A CN117081289A CN202310872297.XA CN202310872297A CN117081289A CN 117081289 A CN117081289 A CN 117081289A CN 202310872297 A CN202310872297 A CN 202310872297A CN 117081289 A CN117081289 A CN 117081289A
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- 230000005284 excitation Effects 0.000 title claims abstract description 32
- 238000004804 winding Methods 0.000 claims abstract description 95
- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000002441 reversible effect Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims description 4
- 238000005457 optimization Methods 0.000 description 12
- 230000001360 synchronised effect Effects 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The application relates to the technical field of motors, in particular to a rotor structure of a hybrid excitation motor. The rotor iron cores are uniformly arranged at intervals along the circumferential direction of the rotating shaft, each rotor iron core comprises magnetic poles which are fixed on the rotating shaft and are radially arranged along the rotating shaft, one end of each magnetic pole, which is far away from the rotating shaft, is provided with an arc-shaped pole shoe, and a rotor groove is reserved between every two adjacent rotor iron cores; the exciting windings are energized windings which are wound on the magnetic poles and span adjacent rotor slots, and the current directions of the adjacent exciting windings in the same rotor slot are the same; the magnetic field optimizing structure is arranged on the pole shoe and is used for forming a reverse magnetic field at the coupling and overlapping position of the magnetic field generated by the exciting winding and the armature winding of the stator structure. The rotor has simple structure, can reduce the magnetic field saturation degree of the rotor pole shoe position and improve the motor torque.
Description
Technical Field
The application relates to the technical field of motors, in particular to a rotor structure of a hybrid excitation motor.
Background
The existing new energy automobile driving motor mostly adopts a permanent magnet synchronous motor, and also has an electric excitation synchronous motor, such as BMW and method Lei Ao. The reason why the permanent magnet synchronous motor is preferred for the new energy driving motor is mainly that the permanent magnet synchronous motor has high power density, high efficiency and wide coverage of an efficient area, so that the endurance mileage of the electric automobile can be improved and the weight can be reduced. However, the permanent magnet synchronous motor has problems when applied to new energy automobiles, and can be summarized as follows:
first, in order to increase the power density of a permanent magnet synchronous motor for driving a new energy automobile, it is necessary to increase the magnetic field strength, but since the high-speed deep field weakening occurs by increasing the magnetic field strength, the field weakening of the permanent magnet synchronous motor is performed by increasing the field weakening current, and this method involves a risk of causing demagnetization of the magnetic steel and increases reactive power, thereby making the motor less efficient in a high-speed region.
Second, because rare earth materials are added into the permanent magnet of the permanent magnet synchronous motor, the rare earth materials are non-viable materials and have high price, and the price and production sustainability of the new energy driving motor using the rare earth materials are high.
Aiming at the problems existing in the application of the permanent magnet synchronous motor to the new energy automobile, the electric excitation synchronous motor has good advantages. The magnetic field of the electric excitation synchronous motor can be adjusted by adjusting the exciting current, large demagnetizing current is not needed in a high-speed weak magnetic area, and the power factor of the motor can be improved, so that the efficiency of the motor is improved, and high-speed constant power output is realized.
The motor introduced by the patent comprises a rotating shaft, a rotor iron core, a permanent magnet and an excitation winding; the rotor core is arranged on the rotating shaft; the permanent magnets are inlaid in the magnetic steel grooves of the rotor iron core; the exciting windings are corresponding to the permanent magnets one by one along the radial direction and are wound on the carrier of the rotor core, the exciting windings are positioned on the inner sides of the permanent magnets, and the axis of the exciting windings is parallel to the magnetic pole direction of the permanent magnets. The motor is provided with the exciting winding parallel to the magnetic field direction of the permanent magnet, so that the magnetization and demagnetization can be realized by adjusting the direction and the size of the exciting winding current, the copper loss and the iron loss are reduced, the maximization of the peak constant power interval is realized, and the efficiency is optimized. However, the structure is complex, the magnetic isolation bushing is required, the production and the assembly are not facilitated, the magnetic field saturation condition caused by the magnetic field coupling superposition of the exciting winding and the armature winding is easy to occur at the iron core part of the embedded exciting winding, the motor generates heat due to the magnetic field saturation, the motor performance is reduced, the energy consumption is increased, the space of the exciting winding slot is smaller, and the magnetic field generated by the exciting winding is not utilized to the maximum extent.
Disclosure of Invention
The application aims to solve the defects of the background technology and provide a rotor structure of a hybrid excitation motor.
The technical scheme of the application is as follows: a rotor structure of a hybrid excitation motor comprises,
a rotating shaft;
the rotor iron cores are uniformly arranged at intervals along the circumferential direction of the rotating shaft, each rotor iron core comprises magnetic poles which are fixed on the rotating shaft and are radially arranged along the rotating shaft, one end of each magnetic pole, which is far away from the rotating shaft, is provided with an arc-shaped pole shoe, and a rotor groove is reserved between every two adjacent rotor iron cores;
the excitation windings are energized windings which are wound on the magnetic poles and span adjacent rotor grooves, and the current directions of the adjacent excitation windings in the same rotor groove are the same;
and the magnetic field optimizing structure is arranged on the pole shoe and is used for forming a reverse magnetic field at the coupling and overlapping position of the magnetic field generated by the exciting winding and the armature winding of the stator structure.
According to the rotor structure of the hybrid excitation motor provided by the application, the magnetic field optimization structure comprises,
the permanent magnet unit is a permanent magnet structure arranged between the adjacent pole shoes, the permanent magnet unit is positioned between two adjacent groups of exciting windings in the circumferential direction of the rotating shaft, and the magnetizing direction of the permanent magnet unit is opposite to the direction of a magnetic field generated by the adjacent exciting windings.
According to the rotor structure of the hybrid excitation motor provided by the application, the permanent magnet unit comprises,
the first permanent magnet is of a permanent magnet structure with two ends fixed at the circumferential ends of the adjacent pole shoes, and the magnetizing direction of the first permanent magnet extends along the tangential direction of the rotating shaft.
According to the rotor structure of the hybrid excitation motor, the first central line of the first permanent magnet perpendicular to the magnetizing direction of the first permanent magnet penetrates through the axis of the rotating shaft, and adjacent excitation windings are symmetrically arranged by taking the first central line of the first permanent magnet between the adjacent excitation windings as a center.
According to the rotor structure of the hybrid excitation motor, the clamping groove for clamping the first permanent magnet is formed in the circumferential end of the pole shoe.
According to the rotor structure of the hybrid excitation motor provided by the application, the permanent magnet unit comprises,
the two groups of second permanent magnets are respectively fixed at the end parts of pole shoes at two sides of the circumferential direction of the same rotor groove, gaps are reserved between the two groups of second permanent magnets in the circumferential direction of the rotating shaft, and the magnetizing directions of the two groups of second permanent magnets are the same and extend along the tangential direction of the rotating shaft.
According to the rotor structure of the hybrid excitation motor, the magnetic steel groove which extends along the axial direction and is used for accommodating the second permanent magnet is formed in the pole shoe.
According to the rotor structure of the hybrid excitation motor, the irregular protrusions which can form a magnetic isolation bridge with the pole shoes are arranged in the magnetic steel grooves.
The application has the advantages that: 1. according to the application, the magnetic field optimization structure is arranged at the position of the maximum magnetic field coupling overlapping of the exciting winding and the armature winding, the magnetic field generated by the magnetic field optimization structure is opposite to the magnetic field generated by the exciting winding, so that the magnetic field saturation degree of the magnetic field overlapping part of the exciting winding and the armature winding can be improved, the condition that the heating temperature of a rotor is too high is avoided, the motor performance is optimized, the motor energy consumption is reduced, the magnetic field at other positions of a stator can be further promoted by adding the magnetic field optimization structure, the motor performance is further improved, the number of turns of the exciting winding can be reduced, the cost is saved, and the motor has great popularization value;
2. the magnetic field optimization structure comprises a permanent magnet unit, wherein the permanent magnet unit is a permanent magnet structure arranged on a pole shoe, and the permanent magnet structure can emit a reverse magnetic field at the position of the magnetic field overlapping part of the exciting winding and the armature winding, so that the saturation degree of the overlapped magnetic field can be effectively improved, the torque performance of a motor can be improved, the magnetic density of the pole shoe part of a rotor magnetic pole under the condition of load is reduced, and the loss of the motor is reduced;
3. the permanent magnet unit comprises the first permanent magnet, the first permanent magnet is simple in structure and convenient to arrange, the magnetic field generated by the first permanent magnet is just positioned at the coupling position of the magnetic field of the exciting winding and the armature winding, and the permanent magnet unit is simple to assemble and convenient to install;
4. according to the application, the first permanent magnet is just positioned at the maximum saturation position of the magnetic field in the circumferential direction of the rotating shaft, and the magnetic field generated by the first permanent magnet can improve the saturation degree of the magnetic field overlapping part of the exciting winding and the armature winding to the greatest extent, so that the energy consumption is reduced to the greatest extent and the motor performance is improved;
5. according to the application, the clamping groove is formed in the circumferential end part of the pole shoe, and the clamping groove is convenient for clamping the first permanent magnet, so that the assembly mode of the first permanent magnet is extremely simple, and the integral installation efficiency is extremely high;
6. the permanent magnet unit comprises two groups of second permanent magnets which are arranged at intervals, the second permanent magnets which are arranged at intervals facilitate winding of the excitation winding, and the permanent magnet unit has a simple integral structure and is convenient to install;
7. the magnetic steel groove is arranged on the pole shoe and is used for accommodating the second permanent magnet, so that the second permanent magnet is extremely convenient to install and is firm and stable to install;
8. the magnetic steel groove is internally provided with the irregular protrusions, so that a magnetic isolation bridge can be formed in the pole shoe, and the structure is simple.
The rotor has simple structure, can reduce the magnetic field saturation degree of the rotor pole shoe position, improve the motor torque, simultaneously reduce the magnetic density of the rotor pole shoe position under the load condition, reduce the motor loss, improve the motor performance and have great popularization value.
Drawings
Fig. 1: the rotor structure of the application is schematically arranged;
fig. 2: the rotor structure schematic diagram (first permanent magnet) of the application;
fig. 3: the rotor structure schematic diagram (second permanent magnet) of the application;
wherein: 1-a rotating shaft; 2-magnetic pole; 3-pole shoe; 4-rotor groove; 5-exciting winding; 6-a first permanent magnet; 7-a second permanent magnet; 8-a magnetic steel groove; 9-a stator; 10-armature winding.
Detailed Description
Embodiments of the present application are described in detail below, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
The application will now be described in further detail with reference to the drawings and to specific examples.
The application relates to a rotor structure of a hybrid excitation motor, which comprises an excitation winding and a permanent magnet unit, as shown in figure 1, the whole motor structure comprises a rotor structure and a stator structure, wherein the stator structure is arranged around the outer side of the rotor structure, an armature winding 10 is arranged on a stator 9 (the rotor structure is mainly discussed in the application, the stator structure belongs to the conventional technical scheme), and the permanent magnet unit is used for improving the magnetic field saturation degree of the magnetic field coupling position of the excitation winding and the armature winding, so that the motor loss is reduced, the motor torque is improved, the magnetic density of the rotor pole shoe position under the load condition is reduced, and the overall performance of the motor is improved.
Specifically, as shown in fig. 1, the rotor structure of the hybrid excitation motor comprises a rotating shaft 1, a plurality of rotor cores, a plurality of groups of excitation windings 5 and a magnetic field optimization structure, wherein the rotating shaft 1 is of a columnar solid shaft structure, the rotor cores are uniformly arranged at intervals along the circumferential direction of the rotating shaft 1, the rotor cores comprise magnetic poles 2 which are fixed on the rotating shaft 1 and are radially arranged along the rotating shaft 1, one end, far away from the rotating shaft 1, of each magnetic pole 2 is provided with an arc-shaped pole shoe 3, the magnetic poles 2 and the pole shoes 3 form a T-shaped structure, and a rotor groove 4 is reserved between the adjacent rotor cores. The exciting windings 5 are energized windings wound on the magnetic poles 2 and crossing adjacent rotor slots 4, the current directions of the adjacent exciting windings 5 in the same rotor slot 4 are the same, the exciting windings 5 are on the rotor structure, a magnetic field can be generated after the exciting windings 5 are energized, the magnetic field generated by the exciting windings 5 and the magnetic field generated by the armature windings 10 of the stator structure can generate a magnetic field coupling phenomenon on the pole shoes 3, the magnetic field saturation degree of the coupling position is higher, and if the coupling position is not treated, the torque performance of the motor can be reduced. Therefore, the magnetic field optimization structure is arranged on the pole shoe 3, and the magnetic field optimization structure can form a reverse magnetic field at the magnetic field coupling position of the exciting winding 5 and the armature winding 10, so that the magnetic field saturation degree of the magnetic field overlapping part of the exciting winding and the armature winding 10 is improved, the situation that the heating temperature of the rotor is too high is avoided, the motor performance is optimized, and the motor energy consumption is reduced.
In some embodiments of the present application, the magnetic field optimization structure described above is further described, as shown in fig. 1-2, where the magnetic field optimization structure of the present embodiment includes permanent magnet units, the permanent magnet units are permanent magnet structures disposed between adjacent pole shoes 3, the permanent magnet units are located between two adjacent groups of excitation windings 5 in the circumferential direction of the rotating shaft 1, and the magnetizing direction of the permanent magnet units is opposite to the magnetic field direction generated by the adjacent excitation windings 5. The exciting winding 5 is a winding wound on the magnetic pole 2, and the exciting winding 5 and the armature winding 10 generate magnetic field coupling at the end part of the pole shoe 3, so that the saturation degree of the magnetic field at the end part of the pole shoe 3 is too high, the torque of the motor is reduced, and the energy consumption of the torque is greatly increased. In this embodiment, the permanent magnet unit is disposed at the end of the pole shoe 3, where the permanent magnet unit is located at the end of the pole shoe 3, and is actually located at the coupling position of the magnetic field of the exciting winding 5 and the armature winding 10, and the magnetic field generated by the permanent magnet unit is opposite to the magnetic field generated by the exciting winding 5, which is equivalent to canceling a part of the magnetic field generated by the exciting winding 5 and the armature winding 10, so as to improve the saturation degree of the magnetic field at the coupling position of the magnetic field of the exciting winding 5 and the armature winding 10, reduce the energy consumption of the motor, and improve the performance of the motor.
In other embodiments of the present application, the structure of the permanent magnet unit is optimized in this embodiment, and specifically, as shown in fig. 2, the permanent magnet unit in this embodiment includes a first permanent magnet 6, where the first permanent magnet 6 is a permanent magnet structure with two ends fixed at the circumferential ends of the adjacent pole shoes 3, and the magnetizing direction of the first permanent magnet 6 extends along the tangential direction of the rotating shaft 1.
The magnetizing direction of the first permanent magnet 6 extends along the tangential direction of the rotating shaft 1, the axial direction of the exciting winding 5 is the radial direction of the rotating shaft 1 (the magnetic poles 2 are arranged along the radial direction of the rotating shaft 1), the direction of the magnetic field generated by the adjacent exciting winding 5 at the position where the first permanent magnet 6 is located extends along the tangential direction, and the direction is just opposite to the magnetizing direction of the first permanent magnet 6, the overlapped magnetic field at the position is partially eliminated, and the saturation degree of the magnetic field at the position is reduced.
In order to better improve the saturation of the superimposed magnetic field generated by the exciting winding 5 and the armature winding 10, the present embodiment optimizes the arrangement position of the first permanent magnet 6, as shown in fig. 2, the first center line of the first permanent magnet 6 perpendicular to the magnetizing direction thereof passes through the axis of the rotating shaft 1, and adjacent exciting windings 5 are symmetrically arranged with the first center line of the first permanent magnet 6 therebetween as the center. This arrangement ensures that the first permanent magnet 6 is located just at the maximum field coupling overlap of the field winding 5 and the armature winding 10, and that the magnetic field generated by the first permanent magnet 6 can improve the saturation of the overlapping field generated by the field winding 5 and the armature winding 10 to the greatest extent.
In addition, in order to facilitate the installation of the first permanent magnet 6, as shown in fig. 3, a clamping groove for clamping the first permanent magnet 6 is formed at the circumferential end of the pole shoe 3 in this embodiment. During assembly, the first permanent magnet 6 can be directly inserted into the clamping groove of the pole shoe 3 along the axial direction of the rotating shaft 1, the clamping groove can just limit the first permanent magnet 6 on the pole shoe 3, and the whole installation is very simple and convenient.
During actual assembly, the rotor core is mounted on the rotating shaft 1, then the exciting windings 5 are wound on the magnetic poles 2 of the rotor core, and after all the exciting windings 5 are assembled, the first permanent magnet 6 is mounted based on the clamping grooves on the pole shoes 3, so that the assembly process of the rotor structure is completed.
In some embodiments of the present application, another optimization is performed on the above-mentioned permanent magnet unit, specifically, as shown in fig. 3, the permanent magnet unit includes two groups of second permanent magnets 7, where the two groups of second permanent magnets 7 are fixed at the end portions of the pole shoes 3 at two circumferential sides of the same rotor slot 4, and gaps are left between the two groups of second permanent magnets 7 in the circumferential direction of the rotating shaft 1, and the magnetizing directions of the two groups of second permanent magnets 7 are the same and extend along the tangential direction of the rotating shaft 1.
The two groups of second permanent magnets 7 are separately arranged and respectively arranged on the two adjacent groups of pole shoes 3, and the two groups of second permanent magnets 7 are arranged at intervals in the circumferential direction of the rotating shaft 1, so that the design structure is convenient for winding the exciting windings 5, the second permanent magnets 7 can be mounted on the corresponding pole shoes 3 in advance, and then the winding of the exciting windings 5 is carried out through gaps between the two groups of second permanent magnets 7.
In addition, this embodiment provides another optimization scheme for the installation of the second permanent magnet 7, as shown in fig. 3, the pole shoe 3 is provided with a magnetic steel groove 8 extending along the axial direction for accommodating the second permanent magnet 7 (the magnetic steel groove 8 is closed in the circumferential direction of the rotating shaft 1, which is different from the clamping groove structure, the clamping groove is open in the circumferential direction of the rotating shaft 1, and the clamping groove is an opening structure on one side facing the adjacent pole shoe 3 in the circumferential direction of the rotating shaft 1). The magnetic steel groove 8 is specially used for accommodating the second permanent magnets 7, has a simple structure and is convenient to install and use, and the gaps between two adjacent groups of second permanent magnets 7 are the gaps between the adjacent pole shoes 3.
As shown in fig. 3, the magnetic steel groove 8 is internally provided with irregular protrusions which can form a magnetic isolation bridge with the pole shoe 3.
During actual assembly, the second permanent magnets 7 are assembled into the magnetic steel grooves 8 of the pole shoes 3, after the rotor core is assembled, the rotor core is assembled onto the rotating shaft 1, and then the exciting windings 5 are wound by utilizing gaps between the adjacent second permanent magnets 7, so that the assembly of the whole rotor structure is completed.
The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made without departing from the spirit and scope of the application, which is defined in the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (8)
1. A rotor structure of a hybrid excitation motor is characterized in that: comprising the steps of (a) a step of,
a rotating shaft (1);
the rotor iron cores are uniformly arranged at intervals along the circumferential direction of the rotating shaft (1), each rotor iron core comprises magnetic poles (2) which are fixed on the rotating shaft (1) and are radially arranged along the rotating shaft (1), one end, far away from the rotating shaft (1), of each magnetic pole (2) is provided with an arc-shaped pole shoe (3), and a rotor groove (4) is reserved between every two adjacent rotor iron cores;
the excitation windings (5) are power-on windings which are wound on the magnetic poles (2) and span adjacent rotor slots (4), and the current directions of the adjacent excitation windings (5) in the same rotor slot (4) are the same;
and the magnetic field optimizing structure is arranged on the pole shoe (3) and is used for forming a reverse magnetic field at the position of coupling and overlapping of the magnetic field generated by the exciting winding (5) and the armature winding of the stator structure.
2. A hybrid-excitation motor rotor structure as claimed in claim 1, wherein: the magnetic field optimizing structure comprises a magnetic field optimizing structure,
the permanent magnet units are permanent magnet structures arranged between the adjacent pole shoes (3), the permanent magnet units are positioned between two adjacent groups of exciting windings (5) in the circumferential direction of the rotating shaft (1), and the magnetizing direction of the permanent magnet units is opposite to the direction of a magnetic field generated by the adjacent exciting windings (5).
3. A hybrid-excitation motor rotor structure as claimed in claim 2, wherein: the permanent magnet unit comprises a permanent magnet unit and a permanent magnet unit,
the first permanent magnet (6), the first permanent magnet (6) is the permanent magnet structure of both ends fixed at adjacent pole shoe (3) circumference tip, and the direction of magnetizing of first permanent magnet (6) extends along pivot (1) tangential direction.
4. A hybrid-excitation motor rotor structure as claimed in claim 3, wherein: the first center line of the first permanent magnet (6) perpendicular to the magnetizing direction of the first permanent magnet penetrates through the axis of the rotating shaft (1), and adjacent exciting windings (5) are symmetrically arranged by taking the first center line of the first permanent magnet (6) between the adjacent exciting windings as a center.
5. A hybrid-excitation motor rotor structure as claimed in claim 3 or 4, wherein: and a clamping groove for clamping the first permanent magnet (6) is formed in the circumferential end part of the pole shoe (3).
6. A hybrid-excitation motor rotor structure as claimed in claim 2, wherein: the permanent magnet unit comprises a permanent magnet unit and a permanent magnet unit,
the two groups of second permanent magnets (7), the two groups of second permanent magnets (7) are respectively fixed at the end parts of pole shoes (3) at two sides of the same rotor groove (4) in the circumferential direction, gaps are reserved between the two groups of second permanent magnets (7) in the circumferential direction of the rotating shaft (1), and the magnetizing directions of the two groups of second permanent magnets (7) are the same and extend along the tangential direction of the rotating shaft (1).
7. A hybrid-excitation motor rotor structure as set forth in claim 6, wherein: the pole shoe (3) is provided with a magnetic steel groove (8) which extends along the axial direction and is used for accommodating the second permanent magnet (7).
8. A hybrid-excitation motor rotor structure as set forth in claim 7, wherein: irregular protrusions which can form a magnetic isolation bridge with the pole shoe (3) are arranged in the magnetic steel groove (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310872297.XA CN117081289A (en) | 2023-07-17 | 2023-07-17 | Rotor structure of hybrid excitation motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310872297.XA CN117081289A (en) | 2023-07-17 | 2023-07-17 | Rotor structure of hybrid excitation motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117081289A true CN117081289A (en) | 2023-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310872297.XA Pending CN117081289A (en) | 2023-07-17 | 2023-07-17 | Rotor structure of hybrid excitation motor |
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| Country | Link |
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| CN (1) | CN117081289A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117424420A (en) * | 2023-12-19 | 2024-01-19 | 深圳市盛泰奇科技有限公司 | Frameless motor with mechanical magnetic adjusting function for numerical control machine tool |
-
2023
- 2023-07-17 CN CN202310872297.XA patent/CN117081289A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117424420A (en) * | 2023-12-19 | 2024-01-19 | 深圳市盛泰奇科技有限公司 | Frameless motor with mechanical magnetic adjusting function for numerical control machine tool |
| CN117424420B (en) * | 2023-12-19 | 2024-03-08 | 深圳市盛泰奇科技有限公司 | Frameless motor with mechanical magnetic adjusting function for numerical control machine tool |
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