CN114374305B - Self-starting three-phase synchronous reluctance motor rotor - Google Patents
Self-starting three-phase synchronous reluctance motor rotor Download PDFInfo
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- CN114374305B CN114374305B CN202111486104.4A CN202111486104A CN114374305B CN 114374305 B CN114374305 B CN 114374305B CN 202111486104 A CN202111486104 A CN 202111486104A CN 114374305 B CN114374305 B CN 114374305B
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- rotor
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- iron core
- self
- synchronous reluctance
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- 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
- H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/04—Balancing means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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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 relates to the field of motor equipment, in particular to a self-starting three-phase synchronous reluctance motor rotor. The rotor includes rotor core, rotor core adopts a plurality of centers to have the iron core towards the axial lamination of piece and forms of pivot hole, and the iron core towards the piece that is located pivot hole outlying uses the centre of a circle to set up rectangle magnetic barrier as the center of symmetry, rectangle magnetic barrier includes four independently set up limit portion magnetic barriers, and every limit portion magnetic barrier has two independently symmetrical magnetic barriers, and the tip of every magnetic barrier extends to the periphery that the iron core was towards the piece, and every magnetic barrier forms the first cast aluminium groove of iron core towards the piece, and the cast aluminium in the first cast aluminium groove forms first cast aluminium gib block. The unique iron core punching sheet structure ensures that the rotor resistance is small in the starting process, reduces the starting current, increases the starting torque and enables the motor to be started smoothly. The cast aluminum conducting bar is added on the rotor structure, asynchronous running torque is achieved at asynchronous speed, and when the torque is large enough, the motor has self-starting capability.
Description
Technical Field
The invention relates to the field of motor equipment, in particular to a self-starting three-phase synchronous reluctance motor rotor.
Background
Synchronous reluctance motors have gained attention in low cost, high efficiency applications such as fans, water pumps, etc., due to their low price and superior performance. However, the conventional synchronous reluctance motor needs to be powered by a frequency converter, so that the volume and the cost of the system are increased.
As shown in figure 1, the existing rotor punching sheet of the self-starting synchronous reluctance motor has the following structural characteristics:
a. grid-shaped magnetic barriers 2 are punched on the periphery of the silicon steel sheet 1, and the magnetic barriers 2 occupy a large space of the rotor, so that the squirrel cage conducting bars 3 are arranged without redundant space.
b. The squirrel cage conducting bars 3 are arranged on the outer sides of the magnetic barriers 2, when the motor runs stably, the inhomogeneity of magnetic resistance change is aggravated by the conducting bars 3, so that d-axis inductance and q-axis inductance are not constant values, the torque pulsation of the motor is increased, and vibration and noise in steady-state running can be caused.
Disclosure of Invention
The invention provides a self-starting three-phase synchronous reluctance motor rotor, aiming at solving the problems of vibration and noise in steady operation caused by the rotor punching sheet of the existing self-starting synchronous reluctance motor.
The invention is realized by the following technical scheme: the utility model provides a self-starting three-phase synchronous reluctance motor rotor, the rotor includes rotor core, rotor core adopts a plurality of centers to have the iron core towards the axial lamination of piece of pivot hole and forms, is located that the iron core towards piece of pivot hole outlying uses the centre of a circle to offer rectangle magnetic barrier as the center of symmetry, rectangle magnetic barrier includes four independently set up limit portion magnetic barriers, and every limit portion magnetic barrier has two independent symmetrical magnetic barriers, and the tip of every magnetic barrier extends to the periphery of iron core towards piece, and every magnetic barrier forms the first cast aluminium groove of iron core towards piece, and the first cast aluminium in the aluminium groove forms first cast aluminium gib block.
As a further improvement of the technical scheme, arc-shaped second aluminum casting grooves are symmetrically formed in the four directions of the iron core stamped sheet, and aluminum is cast in the second aluminum casting grooves to form second aluminum casting guide bars.
As a further improvement of the technical scheme of the invention, a plurality of rotor slots are radially distributed side by side along the radial direction at the periphery of the iron core stamped sheet between two adjacent second cast-aluminum slots by taking the center of the iron core stamped sheet as a circle center, the rotor slots form third cast-aluminum slots of the iron core stamped sheet, and cast-aluminum in the third cast-aluminum slots forms third cast-aluminum guide strips.
As a further improvement of the technical scheme of the invention, each first aluminum casting groove can be communicated with one third aluminum casting groove.
As a further improvement of the technical scheme of the invention, four second aluminum casting grooves are arranged in one-to-one correspondence with the four edge magnetic barriers.
As a further improvement of the technical scheme of the invention, the end part of each magnetic barrier extends in the same direction as the radial direction.
As a further improvement of the technical scheme of the invention, two ends of the rotor core are respectively provided with a pressing plate, and at least one pressing plate is provided with a balance block.
As a further improvement of the technical scheme of the invention, the rotor further comprises a rotating shaft, the rotating shaft penetrates through the rotating shaft hole, and the rotating shaft positioned outside the rotor iron core is provided with at least one rotor fan.
A self-starting three-phase synchronous reluctance motor comprises a self-starting three-phase synchronous reluctance motor rotor.
Compared with the traditional synchronous reluctance motor, the self-starting three-phase synchronous reluctance motor rotor reduces the power supply of a frequency converter, realizes the direct power supply of three-phase sinusoidal alternating current, and reduces the volume and the cost of a system. The unique iron core punching sheet structure ensures that the rotor resistance is small in the starting process, reduces the starting current, increases the starting torque and enables the motor to be started smoothly. The design of rotor fan guarantees that the motor increases the air flow at the operation in-process, and the reinforcing motor heat dissipation reduces the motor temperature rise, guarantees that the bearing does not lock because of the temperature rise is too high. The cast aluminum conducting bar is added on the rotor structure, asynchronous running torque is achieved at asynchronous speed, and when the torque is large enough, the motor has self-starting capability. The rectangular magnetic barrier and the aluminum-cast groove of the iron core punching sheet can ensure that the alternating-direct axis inductance only generates reluctance torque when the motor stably operates, and have the characteristics of low rotor resistance, small starting current and the like at asynchronous speed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in 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 some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a rotor sheet of a conventional self-starting synchronous reluctance motor.
Fig. 2 is a schematic structural diagram of an iron core sheet of the self-starting three-phase synchronous reluctance motor rotor according to the present invention.
Fig. 3 is a schematic structural diagram of a self-starting three-phase synchronous reluctance motor rotor according to the present invention.
In the figure: 1-silicon steel sheet, 2-grid magnetic barriers, 3-conducting bars, 4-rotor iron core, 5-iron core punching sheet, 6-edge magnetic barriers, 7-first aluminum casting groove, 8-second aluminum casting groove, 9-third aluminum casting groove, 10-pressing plate, 11-balancing block, 12-rotating shaft and 13-rotor fan.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood 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.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
As shown in fig. 2 and 3, the invention provides a self-starting three-phase synchronous reluctance motor rotor, which includes a rotor core 4, the rotor core 4 is formed by axially laminating a plurality of core laminations 5 with a rotating shaft hole in the center, the core laminations 5 positioned at the periphery of the rotating shaft hole are provided with rectangular magnetic barriers with the center of circle as the symmetric center, each rectangular magnetic barrier includes four independently-arranged edge magnetic barriers 6, each edge magnetic barrier 6 has two independently-symmetric magnetic barriers, the end of each magnetic barrier extends to the periphery of the core lamination 5, each magnetic barrier forms a first cast aluminum groove 7 of the core lamination 5, and cast aluminum in the first cast aluminum groove 7 forms a first cast aluminum guide bar.
In this embodiment, rectangular magnetic barriers are cut on the iron core punching sheet 5, and the synchronous reluctance motor mainly generates reluctance torque by the difference between the quadrature axis inductance and the direct axis inductance. When the motor runs stably, the rectangular magnetic barrier ensures the difference between the magnetic resistances of the d axis and the q axis, generates magnetic resistance torque and ensures the synchronous speed running of the motor.
As shown in fig. 2, the core segment 5 is symmetrically provided with arc-shaped second aluminum casting grooves 8 in four directions, and a second aluminum casting guide bar is formed by casting aluminum in the second aluminum casting grooves 8. The second aluminum casting groove 8 forms four notches in four directions of the iron core stamped steel 5, aluminum is cast in each aluminum casting groove to form a second aluminum casting conducting bar, and the outer edge of the second aluminum casting conducting bar is matched with the circumference of the iron core stamped steel 5.
Further, a plurality of rotor slots are radially distributed side by side along the radial direction at the periphery of the iron core stamped steel 5 between two adjacent second cast aluminum slots 8 by taking the center of the iron core stamped steel 5 as the center of a circle, the rotor slots form a third cast aluminum slot 9 of the iron core stamped steel 5, and cast aluminum in the third cast aluminum slot 9 forms a third cast aluminum guide strip.
In the starting process of the motor, the rotating magnetic field induces electric potential in the conducting bars, the rotor conducting bars induce current, and asynchronous starting torque is generated under the action of the magnetic field. Research shows that eddy current in the conducting bars in the middle of the actual magnetic barriers is small, and in order to improve the utilization rate of the conducting bars, a plurality of third cast aluminum conducting bars are only inserted between two adjacent second cast aluminum grooves 8. The thickness of the conducting bars on the surface of the rotor core 4 is large, the starting torque is large, the motor can be quickly started and stabilized at the synchronous speed, and meanwhile, the starting speed of the motor is accelerated.
Three forms of cast aluminum conductors have asynchronous running torque at asynchronous speeds, and when the torque is sufficiently large, the motor has self-starting capability. The rectangular magnetic barrier of the iron core punching sheet 5 and the third cast aluminum conducting bar in a squirrel cage shape can ensure that the alternating current and direct current shaft inductance only generates reluctance torque when the motor stably operates, and the characteristics of low rotor resistance, small starting current and the like are achieved at asynchronous speed.
As shown in fig. 2, each of the first cast aluminum grooves 7 can communicate with one of the third cast aluminum grooves 9.
Furthermore, four second aluminum casting grooves 8 are arranged corresponding to the four edge magnetic barriers 6 one by one. Therefore, the plurality of rotor slots are located at the edge positions of the four side magnetic barriers 6, respectively. The unique structure of the iron core punching sheet 5 ensures that the rotor resistance is small in the starting process, reduces the starting current, increases the starting torque and enables the motor to be started smoothly.
Preferably, the end of each magnetic barrier extends in the same direction as the radial direction.
As shown in fig. 3, two ends of the rotor core 4 are respectively provided with a pressing plate 10, and at least one pressing plate 10 is provided with a balance weight 11. The balance weights 11 in this embodiment are welded to the pressing plates 10 at both ends of the rotor core 4 after a balance test, so as to ensure that the rotor does not generate centrifugal force due to weight deviation during operation.
Specifically, the rotor further includes a rotating shaft 12, the rotating shaft 12 penetrates through the rotating shaft hole, and a rotor fan 13 is disposed on the rotating shaft 12 located outside the rotor core 4. Through the rotation of pivot 12, guarantee that the motor operation in-process, increase the air flow, the reinforcing motor heat dissipation reduces the motor temperature rise, extension motor life guarantees that the bearing does not lock because of the temperature rise is too high.
The invention further provides a self-starting three-phase synchronous reluctance motor which comprises the self-starting three-phase synchronous reluctance motor rotor. Compared with the traditional synchronous reluctance motor, the invention reduces the power supply of a frequency converter, realizes the direct power supply of three-phase sine alternating current and reduces the volume and the cost of the system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The rotor of the self-starting three-phase synchronous reluctance motor comprises a rotor core (4), wherein the rotor core (4) is formed by axially laminating a plurality of iron core stamped sheets (5) with rotating shaft holes in the centers, and is characterized in that the iron core stamped sheets (5) positioned at the peripheries of the rotating shaft holes are provided with rectangular magnetic barriers by taking the circle center as the symmetric center, each rectangular magnetic barrier comprises four independently-arranged edge magnetic barriers (6), each edge magnetic barrier (6) is provided with two independently-symmetric magnetic barriers, the end part of each magnetic barrier extends to the periphery of the iron core stamped sheet (5), each magnetic barrier forms a first cast aluminum groove (7) of the iron core stamped sheet (5), and cast aluminum in the first cast aluminum groove (7) forms a first cast aluminum guide strip; arc-shaped second aluminum casting grooves (8) are symmetrically formed in four directions of the iron core stamped sheet (5), and aluminum is cast in the second aluminum casting grooves (8) to form second aluminum casting guide bars; and a plurality of rotor grooves are radially distributed side by side along the radial direction at the periphery of the iron core stamped steel (5) between two adjacent second cast aluminum grooves (8) by taking the center of the iron core stamped steel (5) as the center of a circle, the rotor grooves form a third cast aluminum groove (9) of the iron core stamped steel (5), and cast aluminum in the third cast aluminum groove (9) forms a third cast aluminum guide strip.
2. A self-starting three-phase synchronous reluctance motor rotor according to claim 1, wherein each of the first cast aluminum slots (7) is capable of communicating with one of the third cast aluminum slots (9).
3. A self-starting three-phase synchronous reluctance motor rotor according to claim 1, wherein four second cast aluminum grooves (8) are provided in one-to-one correspondence with four side barriers (6).
4. A self-starting three-phase synchronous reluctance motor rotor according to claim 1, wherein the end of each magnetic barrier extends in the same direction as the radial direction.
5. A self-starting three-phase synchronous reluctance motor rotor according to claim 1, 2, 3 or 4, wherein the two ends of the rotor core (4) are respectively provided with a pressing plate (10), and at least one pressing plate (10) is provided with a balance block (11).
6. A rotor of a self-starting three-phase synchronous reluctance motor according to claim 1, 2, 3 or 4, wherein the rotor further comprises a rotating shaft (12), the rotating shaft (12) is arranged in the rotating shaft hole in a penetrating way, and at least one rotor fan (13) is arranged on the rotating shaft (12) outside the rotor core (4).
7. A self-starting three-phase synchronous reluctance motor comprising a self-starting three-phase synchronous reluctance motor rotor of claim 1 or 2 or 3 or 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111486104.4A CN114374305B (en) | 2021-12-07 | 2021-12-07 | Self-starting three-phase synchronous reluctance motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111486104.4A CN114374305B (en) | 2021-12-07 | 2021-12-07 | Self-starting three-phase synchronous reluctance motor rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114374305A CN114374305A (en) | 2022-04-19 |
| CN114374305B true CN114374305B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111486104.4A Active CN114374305B (en) | 2021-12-07 | 2021-12-07 | Self-starting three-phase synchronous reluctance motor rotor |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2764133A1 (en) * | 1997-05-29 | 1998-12-04 | Abb Ind | SYNCHRONOUS ELECTRIC MACHINE HAVING A DRIVING DEVICE |
| CN202004611U (en) * | 2011-03-07 | 2011-10-05 | 浙江大学 | Cage rotor of self-starting permanent magnet synchronous motor |
| CN112713741A (en) * | 2020-12-21 | 2021-04-27 | 中车永济电机有限公司 | Self-starting three-phase synchronous reluctance motor |
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| CN114374305A (en) | 2022-04-19 |
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