CN111030410A - Novel permanent magnet synchronous motor - Google Patents
Novel permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN111030410A CN111030410A CN201911335001.0A CN201911335001A CN111030410A CN 111030410 A CN111030410 A CN 111030410A CN 201911335001 A CN201911335001 A CN 201911335001A CN 111030410 A CN111030410 A CN 111030410A
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- CN
- China
- Prior art keywords
- permanent magnet
- outer ring
- magnetic flux
- ring permanent
- inner ring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H02K21/02—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
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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
- H02K21/12—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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
Abstract
The invention discloses a novel permanent magnet synchronous motor, which comprises a central rotating shaft; the inner ring permanent magnet device is used for generating a magnetic field; the outer ring permanent magnet device is used for generating a magnetic field; a stator device for generating an electromagnetic field, a housing including a housing portion and a flux modulating portion; the magnetic flux adjusting device comprises a spiral positioning piece, a magnetic flux adjusting shifting piece and an intermediate connecting piece, wherein the intermediate connecting piece is used for converting the axial displacement of the magnetic flux adjusting shifting piece into circumferential rotation of the spiral positioning piece, and the magnetic flux adjusting shifting piece can move along the axial direction of the axis of the central rotating shaft. The spiral positioning piece drives the outer ring permanent magnet device to rotate. The invention adopts a novel rotor structure and a control technology to adjust the effective magnetic field intensity of the rotor, and the torque and rotating speed range of the permanent magnet synchronous motor is enlarged.
Description
Technical Field
The invention relates to the field of machinery, in particular to a novel permanent magnet synchronous motor.
Background
With the development of clean energy electric vehicles, permanent magnet synchronous motors and brushless dc motors are increasingly gaining attention with their advantages of high efficiency, high power density, light weight, etc. The available rotating speed range of the permanent magnet synchronous motor is far lower than that of an asynchronous motor with the same power pole number, but the asynchronous motor has the defects of low power density and low efficiency and is difficult to meet the requirements of high-performance electric automobiles. At present, the domestic and foreign research on flux linkage control of the permanent magnet synchronous motor mainly focuses on the aspects of magnetic resistance control, additional excitation winding control, addition of moving mechanical elements on a rotor and the like. However, the above solutions have some disadvantages, such as the efficiency of the motor is continuously increased, and the structure of the rotor is unbalanced to generate vibration and noise. Research shows that the conical rotor permanent magnet synchronous motor provides a scheme for adjusting flux linkage, but is not suitable for a high-efficiency direct drive motor without a transmission case and an outer rotor. In addition, the stator coil and the core proposed in this study are difficult to be manufactured mechanically, and only a reduction in high-speed magnetic flux is achieved, and the efficiency of the entire rotational speed range cannot be improved.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a novel permanent magnet synchronous motor, which changes the torque and the rotating speed of the permanent magnet synchronous motor by changing the included angle of a magnetic field and changing the magnetic flux. The invention adopts a novel rotor structure to adjust the effective magnetic field intensity and enlarges the torque and rotating speed range of the permanent magnet synchronous motor.
The invention provides a novel permanent magnet synchronous motor with the functions. The method comprises the following steps: a central rotating shaft; the inner ring permanent magnet device is used for generating a magnetic field and is sleeved on the central rotating shaft; the outer ring permanent magnet device is used for generating a magnetic field, and the outer ring permanent magnet device is sleeved on the inner ring permanent magnet device; the stator device is used for generating an electromagnetic field, and is sleeved on the outer ring permanent magnet device; the shell comprises a shell body and a magnetic flux adjusting part, wherein the shell body is provided with an inner cavity for placing the stator device; the magnetic flux adjusting device comprises a spiral positioning piece for driving the outer ring permanent magnet device to rotate, a magnetic flux adjusting shifting piece for adjusting magnetic flux and an intermediate connecting piece for converting the axial displacement of the magnetic flux adjusting shifting piece into circumferential rotation of the spiral positioning piece, one end of the spiral positioning piece is connected with the outer ring permanent magnet device, a chute is arranged on the spiral positioning piece, the magnetic flux adjusting shifting sheet and the middle connecting piece are sleeved on the central rotating shaft and are positioned on the magnetic flux adjusting part, one end of the middle connecting piece is connected with the magnetic flux adjusting poking piece, the other end is provided with a convex block, the convex block is arranged on the inclined groove, the magnetic flux adjusting poking sheet can axially move along the axis of the central rotating shaft, the magnetic flux adjusting shifting piece is provided with a through hole, and a bearing sleeved on the central rotating shaft is arranged in the through hole.
The novel permanent magnet synchronous motor at least has the following technical effects that when the magnetic flux adjusting poking piece axially moves along the axis of the central rotating shaft, the magnetic flux adjusting poking piece can drive the middle connecting piece to axially move, the convex block on the middle connecting piece can apply pressure to the inner wall of the chute in the axial moving process so as to push the spiral positioning piece to rotate, and the spiral positioning piece drives the outer ring permanent magnet device to rotate so as to change the included angle between the inner ring permanent magnet device and the outer ring permanent magnet device. The invention adopts a novel rotor structure and a control mode to adjust the effective magnetic field intensity of the rotor, and the torque and rotating speed range of the permanent magnet synchronous motor is enlarged.
According to the novel permanent magnet synchronous motor provided by the embodiment of the invention, the inner ring permanent magnet device comprises an inner ring permanent magnet and an inner ring silicon steel sheet for fixing the inner ring permanent magnet, and the inner ring permanent magnet is arranged in the inner ring silicon steel sheet. The number of the inner ring permanent magnets can be flexibly adjusted according to actual production environment, and the inner ring silicon steel sheets are mainly used for fixing the inner ring permanent magnets and conducting magnetism.
According to the novel permanent magnet synchronous motor provided by the embodiment of the invention, the outer ring permanent magnet device comprises an outer ring permanent magnet and an outer ring silicon steel sheet for fixing the outer ring permanent magnet, and the outer ring permanent magnet is arranged in the outer ring silicon steel sheet. The number of the outer ring permanent magnets can be flexibly adjusted according to actual production environment, and the outer ring silicon steel sheets are mainly used for fixing the outer ring permanent magnets and conducting magnetism.
According to the novel permanent magnet synchronous motor provided by the embodiment of the invention, the inner ring permanent magnet device further comprises a rotor end cover used for longitudinally fixing the inner ring permanent magnet device and the central rotating shaft. The rotor end cover enables the inner ring permanent magnet device and the central rotating shaft not to generate axial displacement, and the stability of the structure of the inner ring permanent magnet device is guaranteed. The inner ring permanent magnet device rotates around the central rotating shaft under the action of a magnetic field force and cannot generate axial displacement.
According to the novel permanent magnet synchronous motor provided by the embodiment of the invention, the stator device comprises an outer ring stator and an outer ring coil, and the outer ring coil is wound on the outer ring stator. In the working process, the outer ring coil is electrified with time-varying current to generate a time-varying electric field, and the stator device is used for fixing the outer ring coil and transmitting the time-varying electromagnetic field.
According to the novel permanent magnet synchronous motor provided by the embodiment of the invention, the shell part is provided with an opening, and the opening is provided with a plurality of screw mounting holes. An installer can install screws through the screw installation holes to adjust the tightness degree of the outer ring permanent magnet device and the tightness degree of the inner ring permanent magnet device.
According to the novel permanent magnet synchronous motor provided by the embodiment of the invention, the shell part is also provided with an installation part for fixing the motor, and the installation part is provided with a plurality of installation holes. An installer can install the screws through the installation holes, and the bottom of the shell is fixed with a workbench where the motor is located.
The novel permanent magnet synchronous motor provided by the embodiment of the invention further comprises a controller, wherein the controller is used for controlling the outer ring coil to be electrified. The controller can generate time-varying current to electrify the outer ring coil, and is also used for controlling the displacement of the magnetic flux adjusting device.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic front view of a novel permanent magnet synchronous motor according to an embodiment of the present invention;
FIG. 2 is an axial exploded view of the novel PMSM according to the embodiment of the present invention;
fig. 3 is an exploded schematic view of a flux adjusting device of a novel permanent magnet synchronous motor according to an embodiment of the invention;
FIG. 4 is a schematic diagram of the back side of the housing of the novel permanent magnet synchronous motor according to the embodiment of the invention;
reference numerals:
a central rotating shaft 100,
An inner ring permanent magnet device 200, an inner ring permanent magnet 201, an inner ring silicon steel sheet 202, a rotor end cover 203, an outer ring permanent magnet device 300, an outer ring permanent magnet 301, an outer ring silicon steel sheet 302,
The magnetic flux adjusting device 600, the screw positioning piece 601, the inclined groove 602, the magnetic flux adjusting pull piece 603, the through hole 604, the bearing 605, the middle connecting piece 606 and the lug 607.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
With reference to fig. 1-3, a novel permanent magnet synchronous machine according to an embodiment of the invention is described. The method comprises the following steps: a central rotating shaft 100; the inner ring permanent magnet device 200 is used for generating a magnetic field, and the inner ring permanent magnet device 200 is sleeved on the central rotating shaft 100; the outer ring permanent magnet device 300 is used for generating a magnetic field, and the outer ring permanent magnet device 300 is sleeved on the inner ring permanent magnet device 200; the stator device 400 is used for generating an electromagnetic field, and the stator device 400 is sleeved on the outer ring permanent magnet device 300; a housing 500 including a housing portion 501 and a flux regulating portion 507, the housing portion 501 being provided with an inner cavity 502 for placing the stator device 400; the magnetic flux adjusting device 600 comprises a spiral positioning piece 601 for driving the outer ring permanent magnet device 300 to rotate, a magnetic flux adjusting shifting piece 603 for adjusting magnetic flux and an intermediate connecting piece 606 for converting the axial displacement of the magnetic flux adjusting shifting piece 603 into circumferential rotation of the spiral positioning piece 601, one end of the spiral positioning piece 601 is connected with the outer ring permanent magnet device 300, a chute 602 is arranged on the spiral positioning piece 601, the magnetic flux adjusting shifting piece 603 and the intermediate connecting piece 606 are sleeved on the central rotating shaft 100 and are positioned in the magnetic flux adjusting part 507, one end of the intermediate connecting piece 606 is connected with the magnetic flux adjusting shifting piece 603, the other end of the intermediate connecting piece 606 is provided with a lug 607, the lug 607 is arranged on the chute 602, the magnetic flux adjusting shifting piece 603 can axially move along the axis of the central rotating shaft 100, and the magnetic flux adjusting shifting piece 603 is provided with a through hole 604, the through hole 604 is provided with a bearing 605 which is sleeved on the central rotating shaft 100. The invention has the technical effects that when the magnetic flux adjusting shifting piece 603 axially moves along the axis of the central rotating shaft 100, the magnetic flux adjusting shifting piece can drive the intermediate connecting piece 606 to axially move, the convex block 607 on the intermediate connecting piece 606 can apply pressure to the inner wall of the chute 602 in the axial moving process so as to push the spiral positioning piece 601 to rotate, and the spiral positioning piece 601 drives the outer ring permanent magnet device 300 to rotate so as to change the included angle between the inner ring permanent magnet device 200 and the outer ring permanent magnet device 300. The invention adopts a novel rotor structure and a control mode to adjust the effective magnetic field intensity of the rotor, thereby enlarging the torque and rotating speed adjusting range of the permanent magnet synchronous motor.
Referring to fig. 2, according to the novel permanent magnet synchronous motor of the embodiment of the present invention, the inner ring permanent magnet device 200 includes an inner ring permanent magnet 201 and an inner ring silicon steel sheet 202 for fixing the inner ring permanent magnet 201, and the inner ring permanent magnet 201 is installed in the inner ring silicon steel sheet 202. The number of the inner ring permanent magnets 201 can be flexibly adjusted according to actual production environment, and the inner ring silicon steel sheet 2020 is mainly used for fixing the inner ring permanent magnets 201 and conducting magnetism.
Referring to fig. 2, according to the novel permanent magnet synchronous motor of the embodiment of the present invention, the outer ring permanent magnet device 300 includes an outer ring permanent magnet 301 and an outer ring silicon steel sheet 302 for fixing the outer ring permanent magnet 301, and the outer ring permanent magnet 301 is installed in the outer ring silicon steel sheet 302. The number of the outer ring permanent magnets 301 can be flexibly adjusted according to actual production environment, and the outer ring silicon steel sheets 302 are mainly used for fixing the outer ring permanent magnets 301 and conducting magnetism.
Referring to fig. 1 and 2, according to the novel permanent magnet synchronous motor of the embodiment of the present invention, the inner ring permanent magnet device 200 further includes a rotor end cover 203 for longitudinally fixing the inner ring permanent magnet device 200 to the central rotating shaft 100. The rotor end cover 203 prevents the inner ring permanent magnet device 200 and the central rotating shaft 100 from generating axial displacement, and ensures the stability of the structure of the inner ring permanent magnet device 200. The inner ring permanent magnet device 200 does a rotational motion around the central rotating shaft 100 without an axial displacement under the action of a magnetic field force.
Referring to fig. 1 and 2, according to the novel permanent magnet synchronous motor of the embodiment of the present invention, the stator device 400 includes an outer-ring stator 401 and an outer-ring coil 402, and the outer-ring coil 402 is wound on the outer-ring stator 401. In operation, the outer coil 402 is energized with a time-varying current to generate a time-varying electromagnetic field, and the stator assembly 400 is configured to secure the outer coil 402 and to impart the time-varying electromagnetic field.
Referring to fig. 1 and 2, according to the novel permanent magnet synchronous motor of the embodiment of the present invention, the housing portion 501 is provided with an opening 503, and a plurality of screw mounting holes 504 are provided on the opening 503. An installer can install screws through the screw installation holes 504 to adjust the tightness of the outer ring permanent magnet device 300 and the inner ring permanent magnet device 200.
Referring to fig. 1 and 2, according to the novel permanent magnet synchronous motor of the embodiment of the present invention, the housing portion 501 is further provided with a mounting portion 505 for fixing the motor, and the mounting portion is provided with a plurality of mounting holes 506. An installer can install screws through the mounting holes 506 and the bottom of the housing 500 will be fixed to a table on which the motor is located.
Referring to fig. 1 to 4, the novel permanent magnet synchronous motor according to the embodiment of the present invention further includes a controller for controlling the outer coil to be energized. The controller can generate time-varying current to electrify the outer ring coil, and is also used for controlling the displacement of the magnetic flux adjusting device.
It should be added that, in the novel permanent magnet synchronous motor according to each embodiment of the present invention, the controller may be a control system composed of a common microprocessor used in the field of industrial control, such as a PLC chip, an STM32, and an FPGA chip, a DSP chip, and the like. Belongs to the prior art, and detailed description of the specific structure is omitted here.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A novel permanent magnet synchronous motor is characterized by comprising:
a central rotating shaft;
the inner ring permanent magnet device is used for generating a magnetic field and is sleeved on the central rotating shaft;
the outer ring permanent magnet device is used for generating a magnetic field, and the outer ring permanent magnet device is sleeved on the inner ring permanent magnet device;
the stator device is used for generating an electromagnetic field, and is sleeved on the outer ring permanent magnet device;
the shell comprises a shell body and a magnetic flux adjusting part, wherein the shell body is provided with an inner cavity for placing the stator device;
the magnetic flux adjusting device comprises a spiral positioning piece for driving the outer ring permanent magnet device to rotate, a magnetic flux adjusting shifting piece for adjusting magnetic flux and an intermediate connecting piece for converting the axial displacement of the magnetic flux adjusting shifting piece into circumferential rotation of the spiral positioning piece, one end of the spiral positioning piece is connected with the outer ring permanent magnet device, a chute is arranged on the spiral positioning piece, the magnetic flux adjusting shifting sheet and the middle connecting piece are sleeved on the central rotating shaft and are positioned on the magnetic flux adjusting part, one end of the middle connecting piece is connected with the magnetic flux adjusting poking piece, the other end is provided with a convex block, the convex block is arranged on the inclined groove, the magnetic flux adjusting poking sheet can axially move along the axis of the central rotating shaft, the magnetic flux adjusting shifting piece is provided with a through hole, and a bearing sleeved on the central rotating shaft is arranged in the through hole.
2. The novel permanent magnet synchronous motor according to claim 1, wherein the inner ring permanent magnet device comprises an inner ring permanent magnet and an inner ring silicon steel sheet for fixing the inner ring permanent magnet, and the inner ring permanent magnet is installed in the inner ring silicon steel sheet.
3. The novel permanent magnet synchronous motor according to claim 1, wherein the outer ring permanent magnet device comprises an outer ring permanent magnet and an outer ring silicon steel sheet for fixing the outer ring permanent magnet, and the outer ring permanent magnet is installed in the outer ring silicon steel sheet.
4. The new permanent magnet synchronous machine of claim 1, wherein the inner ring permanent magnet assembly further comprises a rotor end cap for longitudinally securing the inner ring permanent magnet assembly to the central rotating shaft.
5. The new permanent magnet synchronous machine of claim 1, wherein the stator arrangement includes an outer ring stator and an outer ring coil wound on the outer ring stator.
6. The novel permanent magnet synchronous motor of claim 1, wherein the housing portion is provided with an opening, and the opening is provided with a plurality of screw mounting holes.
7. The novel permanent magnet synchronous motor according to claim 1, wherein the housing portion is further provided with a mounting portion for fixing the motor, and the mounting portion is provided with a plurality of mounting holes.
8. The novel permanent magnet synchronous motor of claim 1, further comprising a controller for controlling the outer ring coil to be energized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335001.0A CN111030410A (en) | 2019-12-23 | 2019-12-23 | Novel permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335001.0A CN111030410A (en) | 2019-12-23 | 2019-12-23 | Novel permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111030410A true CN111030410A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911335001.0A Pending CN111030410A (en) | 2019-12-23 | 2019-12-23 | Novel permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111030410A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023097729A1 (en) * | 2021-12-02 | 2023-06-08 | 杭州极智医疗科技有限公司 | Rope winding device |
-
2019
- 2019-12-23 CN CN201911335001.0A patent/CN111030410A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023097729A1 (en) * | 2021-12-02 | 2023-06-08 | 杭州极智医疗科技有限公司 | Rope winding device |
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