CN111130291A - Soft magnetic starting outer rotor permanent magnet synchronous motor - Google Patents
Soft magnetic starting outer rotor permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN111130291A CN111130291A CN202010018226.XA CN202010018226A CN111130291A CN 111130291 A CN111130291 A CN 111130291A CN 202010018226 A CN202010018226 A CN 202010018226A CN 111130291 A CN111130291 A CN 111130291A
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- stator
- rotor
- permanent magnet
- aluminum
- synchronous machine
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- 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
- H02K1/2786—Outer rotors
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention discloses a soft magnetic starting outer rotor permanent magnet synchronous motor which comprises a base, a stator, a rotor and a permanent magnet, wherein the base is provided with a stator core and a permanent magnet core; the stator is cylindrical, a plurality of aluminum strips are arranged on the outer side of the stator, a first aluminum ring is arranged at one end of the stator, a second aluminum ring is arranged at the other end of the stator, one end of each aluminum strip is connected with the first aluminum ring, and the other end of each aluminum strip is connected with the second aluminum ring; the rotor is in a hollow cylinder shape, a motor shaft is arranged in the rotor, the axis of the motor shaft is overlapped with the central shaft of the rotor, and the rotor is sleeved outside the stator and is rotationally connected with the stator through a bearing; through the arrangement, the permanent magnet synchronous motor provided by the invention can operate without electronic driving, the cost is reduced, and the permanent magnet synchronous motor is efficient and reliable.
Description
Technical Field
The invention relates to the field of motors, in particular to a soft-magnetic started outer rotor permanent magnet synchronous motor.
Background
The permanent magnet synchronous motor is a synchronous motor which generates a synchronous rotating magnetic field by permanent magnet excitation, the permanent magnet is used as a rotor to generate a rotating magnetic field, and a three-phase stator winding is reacted through an armature under the action of the rotating magnetic field to induce three-phase symmetrical current.
At the moment, the kinetic energy of the rotor is converted into electric energy, and the permanent magnet synchronous motor is used as a generator; in addition, when three-phase symmetrical current is introduced to the stator side, the three-phase stator current has a phase difference of 120 in the spatial position, so that a rotating magnetic field is generated in the space by the three-phase stator current, the rotor rotates under the action of electromagnetic force, electric energy is converted into kinetic energy at the moment, and the permanent magnet synchronous motor is used as a motor.
However, the common permanent magnet synchronous motor needs to be driven electronically, so that the cost of the permanent magnet synchronous motor is high.
Disclosure of Invention
In order to solve the problems, the invention provides a soft magnetic starting outer rotor permanent magnet synchronous motor, wherein a plurality of aluminum strips are arranged on the outer side of a stator, a first aluminum ring is arranged at one end of the stator, a second aluminum ring is arranged at the other end of the stator, one end of each aluminum strip is connected with the first aluminum ring, and the other end of each aluminum strip is connected with the second aluminum ring; the permanent magnet synchronous motor provided by the invention can run without electronic driving, the cost is reduced, and the efficiency and the reliability are high; the specific contents are as follows:
a soft magnetic starting outer rotor permanent magnet synchronous motor is characterized in that: the permanent magnet motor comprises a base, a stator, a rotor and a permanent magnet; the stator is in a cylindrical shape, one end of the stator is fixedly connected with the base, a plurality of aluminum strips are arranged on the outer side of the stator, each aluminum strip is arranged along the axis direction of a central shaft of the stator, a first aluminum ring is arranged at one end of the stator, a second aluminum ring is arranged at the other end of the stator, one end of each aluminum strip is connected with the first aluminum ring, and the other end of each aluminum strip is connected with the second aluminum ring; the rotor is in a hollow cylinder shape, a plurality of rotor slots are formed in the inner wall of the rotor, a plurality of permanent magnet slots are formed in the yoke part of the rotor, and the permanent magnets are fixedly arranged in the permanent magnet slots; a motor shaft is arranged in the rotor, the axis of the motor shaft is overlapped with the central shaft of the rotor, and the rotor is sleeved outside the stator and is rotationally connected with the stator through a bearing; coil windings are arranged on the rotor and the stator.
Preferably, the base is in a cylindrical shape, and the base is inserted into one end of the stator and is in interference fit with the inner wall of the stator.
Preferably, the groove width of the device groove on the rotor is W1, and the tooth width is W2; w1: w2 ═ 1:2 or 2:3 or 4: 5.
Preferably, the width of the permanent magnet slot is W3; w2: w3 ═ 1:1 or 3:2 or 5: 4.
Preferably, the aluminum strip, the first aluminum ring and the second aluminum ring are formed by die casting of mixed aluminum.
Preferably, a non-magnetic conductive material is disposed between the permanent magnet slot and the permanent magnet.
Preferably, anaerobic adhesive is coated on both side walls of the permanent magnet in the width direction.
Preferably, a groove is formed in the base, a protrusion is formed on the outer wall of one end of the stator, and the groove and the protrusion are matched to prevent the stator from sliding in the radial direction.
Preferably, the minimum distance between the rotor slot and the permanent magnet slot is h, and h is more than 0.8mm and less than 2 mm.
Preferably, a waterproof ring is arranged at one end of the rotor close to the permanent magnet.
The invention has the following beneficial effects:
according to the invention, the plurality of aluminum strips are arranged on the outer side of the stator, one end of the stator is provided with a first aluminum ring, the other end of the stator is provided with a second aluminum ring, one end of each aluminum strip is connected with the first aluminum ring, and the other end of each aluminum strip is connected with the second aluminum ring; when the power supply is connected to the stator, the stator winding coil is excited to generate a rotating alternating magnetic field. The first aluminum ring and the second aluminum ring on the stator short circuit the aluminum strips, so that the aluminum strips become conductors and are placed in a rotating magnetic field, and the cutting magnetic induction lines generate force action, so that the rotor rotates and accelerates.
Compared with the traditional permanent magnet synchronous motor technology, the motor has the advantages of no need of electronic driving, low cost, high reliability, high efficiency and the like; compared with the traditional motor technology, the soft start permanent magnet synchronous motor has subversive electromagnetic design and is an innovative outer rotor soft start permanent magnet synchronous motor.
Drawings
Fig. 1 is a structural view of a permanent magnet synchronous motor of the present invention;
FIG. 2 is a block diagram of the stator of FIG. 1;
FIG. 3 is a block diagram of the rotor of FIG. 1;
FIG. 4 is a top view of the rotor of FIG. 1;
FIG. 5 is an enlarged partial view of the rotor of FIG. 4;
the technical features indicated by the reference numerals in the drawings are as follows:
1. a base; 2. a stator; 2.1, aluminum strips; 2.2, a first aluminum ring; 2.3, a second aluminum ring; 3. a rotor; 4. a permanent magnet; 5. and (4) a waterproof ring.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
the permanent magnet synchronous motor shown in fig. 1 comprises a base 1, a stator 2, a rotor 3 and a permanent magnet 4; one end of the stator 2 is fixedly connected with the base 1, and the fixed connection between the stator 2 and the base 1 may be in various manners, and this embodiment shows one of them: the base 1 is cylindrical, the stator 2 is hollow cylindrical, and the base 1 is inserted into one end of the stator 2 and is in interference fit with the inner wall of the stator 2; the stator structure comprises a base 1 and a stator 2, and is characterized in that a groove is formed in the outer wall of the base 1, a protrusion is arranged on the inner wall of one end of the stator 2, and the groove and the protrusion are matched and positioned to prevent the stator from moving in the radial direction. Preferably, the number of the grooves is multiple, the number of the protrusions is multiple, and the grooves correspond to the protrusions one to one; further preferably, the grooves are arranged in a circular ring shape on the outer wall of the base 1, and the protrusions are arranged in a circular ring shape on the inner wall of the stator 2.
The structure of the stator 2 is as shown in fig. 2, a plurality of aluminum strips 2.1 are arranged on the outer side of the stator 2, each aluminum strip is arranged along the axial direction of the central shaft of the stator 2, and the aluminum strips 2.1 are uniformly arranged on the outer wall of the stator 2; a first aluminum ring 2.2 is arranged at one end of the stator 2, a second aluminum ring 2.3 is arranged at the other end of the stator, one end of the aluminum strip 2.1 is connected with the first aluminum ring 2.2, and the other end of the aluminum strip 2.1 is connected with the second aluminum ring 2.3; the aluminum strip 2.1 and the first and second aluminum rings 2.2 and 2.3 are formed by die casting of mixed aluminum.
The structure of the rotor 3 is as shown in fig. 3 and 4, the rotor is in a hollow cylinder shape, a plurality of rotor grooves are punched on the inner wall of the rotor 3, a plurality of permanent magnet grooves are formed in the yoke part of the rotor 3, the permanent magnets are fixedly arranged in the permanent magnet grooves, a motor shaft is arranged in the rotor, the axis of the motor shaft is overlapped with the central shaft of the rotor 3, and the rotor 3 is sleeved on the outer side of the stator 2 and is rotationally connected with the stator 2 through a bearing; coil windings are arranged on the rotor and the stator.
According to the invention, the plurality of aluminum strips are arranged on the outer side of the stator, one end of the stator is provided with a first aluminum ring, the other end of the stator is provided with a second aluminum ring, one end of each aluminum strip is connected with the first aluminum ring, and the other end of each aluminum strip is connected with the second aluminum ring; when the power supply is connected to the stator, the stator winding coil is excited to generate a rotating alternating magnetic field. The first aluminum ring and the second aluminum ring on the stator short circuit the aluminum strips, so that the aluminum strips become conductors and are placed in a rotating magnetic field, and the cutting magnetic induction lines generate force action to rotate and accelerate the rotor; compared with the traditional permanent magnet synchronous motor technology, the motor of the invention has the advantages of no need of electronic driving, low cost, high reliability, high efficiency and the like.
The aluminum strip 2.1, the first aluminum ring 2.2 and the second aluminum ring 2.3 all adopt an YL00 (pure aluminum for die casting) and YL102 mixing ratio: the die-casting forming is carried out at the ratio of 10:7, 2:1 and 5:2, which is beneficial to improving the soft magnetic starting performance and increasing the structural strength.
The groove width of a rotor groove on the rotor is W1, and the tooth width is W2; w1: w2 ═ 1:2 or 2:3 or 4: 5. The slot width to tooth width ratio is designed to allow more flux to pass through the rotor teeth while increasing the starting torque.
The width of the permanent magnet slot is W3; w2: w3 ═ 1:1 or 3:2 or 5: 4. The slot width and tooth width ratio of the permanent magnet are designed to enable the rotor tooth part to pass through reasonable magnetic flux, so that the synchronous rotating speed is smoothly involved and the motor has a wider high-efficiency load interval.
As shown in fig. 5, the length of the permanent magnet slot is greater than that of the permanent magnet, and a non-magnetic conductive material is arranged between the permanent magnet slot and the permanent magnet, and the non-magnetic conductive material may also be air; the non-magnetic conductive material is provided for the purpose of preventing leakage of magnetic flux.
The minimum distance between the rotor slot and the permanent magnet slot is h, wherein h is more than 0.8mm and less than 2 mm. The minimum distance requirement is designed to reduce magnetic leakage and to ensure the strength of the structure.
A waterproof ring 5 is arranged at one end of the rotor 3 close to the permanent magnet 4, and the waterproof ring 5 is used for preventing the permanent magnet from falling off.
The number of slots of the stator 2 is A1, the number of slots of the rotor 3 is A2, and the relationship of A1 and A2 conforms to the following relationship at the same time: a2 is not more than 1.3(A1+ P), A2 is not equal to A1 +/-P, A2 is not equal to A1 +/-2P (wherein P is a logarithm of pole number and has a value range of 1-5, A1 has a value range of 8-48 and A2 has a value range of 11-64.)
The working principle of the permanent magnet synchronous motor provided by the invention is as follows:
1. soft start state: when the power supply is connected to the stator, the stator winding coil is excited to generate a rotating alternating magnetic field. Because the first aluminum ring and the second aluminum ring on the stator short circuit the aluminum strips on the stator, the aluminum strips become conductors and are placed in a rotating magnetic field, and the cutting magnetic induction lines generate force action, so that the rotor 3 rotates and accelerates.
2. The pull-in synchronization state: when the motor is started to 95% of synchronous speed, the motor is acted by the magnetic field of the permanent magnet to generate a sudden change torque, so that the rotor instantaneously exceeds the synchronous speed, and then the motor is restored to a synchronous running state.
3. The synchronous operation state is as follows: the permanent magnet synchronous motor runs at a synchronous rotating speed, has the same characteristics with the permanent magnet synchronous motor, and has the advantages of constant rotating speed, high efficiency, large high-efficiency torque interval and stable output.
The permanent magnet motor provided by the invention has the following advantages:
1. the effective stacking thickness of the same iron core is as follows: the highest efficiency point of the soft magnetic motor is 80%, and the high-efficiency torque interval is rated load: 60% -100%; the maximum efficiency point of the permanent magnet synchronous motor reaches 85-90%, and the high-efficiency torque interval is rated load: 25% -125%; the maximum efficiency point of the motor in the invention reaches more than 85%, and the high-efficiency torque interval is rated load: 35 to 110 percent of
2. Under the same output: the motor of the invention is lighter than a soft magneto: 10 to 12 percent; compared with a permanent magnet direct current motor, the cost is saved by 20-30%.
The above describes an embodiment of the soft magnetic starting outer rotor permanent magnet synchronous motor provided by the present invention in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A soft magnetic starting outer rotor permanent magnet synchronous motor is characterized in that: the permanent magnet motor comprises a base, a stator, a rotor and a permanent magnet; the stator is in a cylindrical shape, one end of the stator is fixedly connected with the base, a plurality of aluminum strips are arranged on the outer side of the stator, each aluminum strip is arranged along the axis direction of a central shaft of the stator, a first aluminum ring is arranged at one end of the stator, a second aluminum ring is arranged at the other end of the stator, one end of each aluminum strip is connected with the first aluminum ring, and the other end of each aluminum strip is connected with the second aluminum ring; the rotor is in a hollow cylinder shape, a plurality of rotor slots are formed in the inner wall of the rotor, a plurality of permanent magnet slots are formed in the yoke part of the rotor, and the permanent magnets are fixedly arranged in the permanent magnet slots; a motor shaft is arranged in the rotor, the axis of the motor shaft is overlapped with the central shaft of the rotor, and the rotor is sleeved outside the stator and is rotationally connected with the stator through a bearing; coil windings are arranged on the rotor and the stator.
2. The synchronous machine of claim 1, wherein: the base is cylindrical, and the base is inserted into one end of the stator and is in interference fit with the inner wall of the stator.
3. The synchronous machine of claim 1, wherein: the groove width of a rotor groove on the rotor is W1, and the tooth width is W2; w1: w2 ═ 1:2 or 2:3 or 4: 5.
4. A synchronous machine as claimed in claim 3, characterized in that: the width of the permanent magnet slot is W3; w2: w3 ═ 1:1 or 3:2 or 5: 4.
5. The synchronous machine of claim 1, wherein: the aluminum strip, the first aluminum ring and the second aluminum ring are formed by die casting of mixed aluminum.
6. The synchronous machine of claim 1, wherein: and a non-magnetic conductive material is arranged between the permanent magnet slot and the permanent magnet.
7. The synchronous machine of claim 1, wherein: anaerobic adhesive is coated on two side walls of the permanent magnet along the width direction.
8. The synchronous machine of claim 1, wherein: the stator structure comprises a base, and is characterized in that a groove is formed in the base, a protrusion is arranged on the outer wall of one end of the stator, and the groove is matched with the protrusion to prevent the stator from sliding in the radial direction.
9. The synchronous machine of claim 1, wherein: the minimum distance between the rotor slot and the permanent magnet slot is h, wherein h is more than 0.8mm and less than 2 mm.
10. The synchronous machine of claim 1, wherein: and a waterproof ring is arranged at one end of the rotor close to the permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018226.XA CN111130291A (en) | 2020-01-08 | 2020-01-08 | Soft magnetic starting outer rotor permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018226.XA CN111130291A (en) | 2020-01-08 | 2020-01-08 | Soft magnetic starting outer rotor permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111130291A true CN111130291A (en) | 2020-05-08 |
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ID=70488465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010018226.XA Pending CN111130291A (en) | 2020-01-08 | 2020-01-08 | Soft magnetic starting outer rotor permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111130291A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580428A (en) * | 2013-11-12 | 2014-02-12 | 大连东利伟业环保节能科技有限公司 | Half-magnetic-sheet outer-rotor type asynchronous starting permanent-magnet synchronous motor |
| US20180205302A1 (en) * | 2017-01-19 | 2018-07-19 | Hamilton Sundstrand Corporation | Permanent magnet (pm) brushless machine with outer rotor |
| CN208461560U (en) * | 2018-05-25 | 2019-02-01 | 江苏航天动力机电有限公司 | New-type asynchronous starting and permanent magnet motor outer rotor core structure |
-
2020
- 2020-01-08 CN CN202010018226.XA patent/CN111130291A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580428A (en) * | 2013-11-12 | 2014-02-12 | 大连东利伟业环保节能科技有限公司 | Half-magnetic-sheet outer-rotor type asynchronous starting permanent-magnet synchronous motor |
| US20180205302A1 (en) * | 2017-01-19 | 2018-07-19 | Hamilton Sundstrand Corporation | Permanent magnet (pm) brushless machine with outer rotor |
| CN208461560U (en) * | 2018-05-25 | 2019-02-01 | 江苏航天动力机电有限公司 | New-type asynchronous starting and permanent magnet motor outer rotor core structure |
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Application publication date: 20200508 |