CN113904473A - High-voltage self-starting permanent magnet motor punching sheet and motor using same - Google Patents
High-voltage self-starting permanent magnet motor punching sheet and motor using same Download PDFInfo
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- CN113904473A CN113904473A CN202111181402.2A CN202111181402A CN113904473A CN 113904473 A CN113904473 A CN 113904473A CN 202111181402 A CN202111181402 A CN 202111181402A CN 113904473 A CN113904473 A CN 113904473A
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- punching sheet
- magnetic steel
- permanent magnet
- magnetic
- magnet 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
- 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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention belongs to the field of permanent magnet motors, and particularly relates to a high-voltage self-starting permanent magnet motor punching sheet and a motor using the same, wherein the high-voltage self-starting permanent magnet motor punching sheet comprises a rotor punching sheet, the periphery of the outer edge of the rotor punching sheet is equidistantly provided with squirrel cage bar holes, the rotor punching sheet is provided with a magnetic steel groove, the end part of the magnetic steel groove is positioned between two adjacent squirrel cage bar holes, and a magnetic separation bridge is arranged between the two end parts of the magnetic steel groove and the outer edge of the rotor punching sheet; the end parts of the magnetic steel grooves are arranged between two adjacent squirrel cage bar holes, so that the antimagnetic effect is improved, the cost is saved, and the aim of improving the torque pulsation, vibration and noise of the motor is fulfilled.
Description
Technical Field
The invention belongs to the field of permanent magnet motors, and particularly relates to a high-voltage self-starting permanent magnet motor punching sheet and a motor using the punching sheet.
Background
At present, the high-voltage self-starting permanent magnet motor replaces a high-voltage asynchronous motor for more and more applications, but the performance and cost difference of the high-voltage permanent magnet motor produced by each company is larger. The main reason is that the high-power high-voltage self-starting permanent magnet motor has a plurality of technical difficulties: (1) due to the structure of the rotor permanent magnet, the air gap magnetic density is high, the air gap magnetic density waveform design is not good, and the problems of vibration and noise of the whole machine are easily caused. (2) The rotor needs to be embedded with a permanent magnet, and compared with an asynchronous motor, the rotor is complex in structure and poor in strength, and the problems of magnetic leakage and structural strength need to be comprehensively considered. (3) Due to the particularity of the high-voltage self-starting permanent magnet motor, the starting and pulling performance can hardly reach the standard of a high-voltage asynchronous motor. (4) The ventilation and heat dissipation design is different from that of a high-voltage asynchronous motor, and the improvement of power density is limited.
In addition, the existing permanent magnet motor rotor punching sheet is mostly of a circular structure as shown in fig. 3, squirrel cage bar holes are distributed on the circumference at equal intervals, and magnetic steel grooves are formed in the rotor punching sheet. In order to prevent magnetic leakage, part of the magnetic steel grooves are in double V shapes, and the end parts of the magnetic steel grooves are close to the squirrel cage bar holes. The V-shaped magnetic steel groove is matched with squirrel cage bar holes at two ends of the V-shaped magnetic steel groove, and forms a relatively closed space with the excircle of the punching sheet. In the permanent magnet motor, in order not to make the magnetic leakage coefficient of magnet steel too big and lead to the utilization ratio of magnet steel too low, the magnetism isolation measure of taking: and a magnetic isolation bridge is arranged between the two magnetic steels. In the arrangement mode of the existing rotor punching sheet, a magnetic isolation bridge is required to be arranged in a gap between the magnetic steel groove and the squirrel cage bar hole, and a magnetic isolation bridge is required to be arranged in a gap between the squirrel cage bar hole and the outer circle of the punching sheet. That is to say, one tip of magnetic steel groove has set up two and has separated magnetic bridge, has increased the risk of magnetic leakage, also leads to the increase of cost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-voltage self-starting permanent magnet motor punching sheet, wherein the end part of a magnetic steel groove is arranged between two adjacent squirrel cage bar holes, so that the antimagnetic effect is improved, the cost is saved, and the aim of improving the torque pulsation, vibration and noise of the motor is fulfilled; and provides a high-voltage self-starting permanent magnet motor with good antimagnetic effect, low noise and low cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-voltage self-starting permanent magnet motor punching sheet comprises a rotor punching sheet, wherein squirrel cage bar holes are distributed in the periphery of the outer edge of the rotor punching sheet at equal intervals, a magnetic steel groove is formed in the rotor punching sheet, the end part of the magnetic steel groove is located between two adjacent squirrel cage bar holes, and a magnetic separation bridge is arranged between the two end parts of the magnetic steel groove and the outer edge of the rotor punching sheet.
Preferably, the number of the squirrel cage bar holes between the two end parts of the magnetic steel groove is even.
Preferably, the magnetic steel grooves comprise two L-shaped first magnetic steel grooves, a magnetic isolation bridge is arranged between the end parts of the long sides of the two first magnetic steel grooves, the two first magnetic steel grooves are symmetrically arranged to form a one-line-shaped groove group, and the end parts of the short sides of the two first magnetic steel grooves are positioned between the two squirrel cage bar holes.
Preferably, the magnetic steel device further comprises second magnetic steel grooves, the two second magnetic steel grooves are connected end to form a linear structure, the two linear structures are symmetrically arranged to form a V-shaped groove group, the first magnetic steel groove is located in an opening of the V-shaped groove group, and a symmetry axis of the linear groove group is coincident with a symmetry axis of the V-shaped groove group.
Preferably, the linear groove group and the V-shaped groove group are combined to form a magnetic pole groove with a V + linear structure, the rotor punching sheet is provided with six magnetic pole grooves which are equidistantly distributed on the rotor punching sheet along the circumference, and N, S poles are uniformly distributed in a crossed manner.
Preferably, the rotor punching sheet structure is a full circle structure, sixty squirrel cage bar holes are uniformly distributed on the outer portion of the rotor punching sheet structure, and the sixty squirrel cage bar holes are arranged on the edge of the punching sheet along the circumference at equal intervals.
Preferably, the stator punching sheet is of a full-circle structure and is provided with seventy-two open slots at equal intervals along the circumference.
Preferably, the notch of the open slot is provided with a slot wedge slot.
A motor using a high-voltage self-starting permanent magnet motor punching sheet.
The invention has the beneficial effects that:
1) the rotor punching sheet is provided with the V + I-shaped magnetic steel groove, the technical bias is overcome, the end part of the magnetic steel groove is not corresponding to the squirrel cage bar holes, but the end part of the magnetic steel groove is arranged between the two squirrel cage bar holes, the magnetic steel groove and the outer circle of the punching sheet directly form a relatively closed space, so that magnetic leakage is prevented, and a magnetic separation bridge is arranged in a gap between the end part of the magnetic steel groove and the outer circle of the punching sheet.
2) The rotor punching sheet is provided with six magnetic pole grooves, the shapes and the layout of the magnetic steel grooves are reasonably designed in a limited space, and the magnetic circuit design of other parts of the stator punching sheet and the rotor punching sheet is combined, so that the no-load counter electromotive force waveform is optimized, the harmonic content in the harmonic no-load counter electromotive force is reduced, and the torque pulsation, the vibration and the noise of the motor are improved.
3) The number of rotor squirrel cage bar holes is sixty, and the number of the rotor squirrel cage bar holes is preferably matched with the number of the stator slots seventy-two. The seventy-two and sixty grooves are matched, and the squirrel cage bar hole shape is designed, so that the integral design of the motor is matched, and the starting torque and the pull-in torque of the motor are improved on the premise of strictly controlling the starting current, so that the starting and pull-in synchronous rotating speed capacity of the motor is improved.
4) The magnetic steel groove shape is optimized through a magnetic circuit, a magnetic steel positioning spigot is arranged on the upper portion of the V-shaped included angle, a magnetic steel positioning spigot is arranged on the upper portion of the linear magnetic steel, the magnetic circuit design of the spigot effectively guides the trend of the reverse demagnetizing field, effectively protects the demagnetizing effect of the reverse demagnetizing field on the magnetic steel sharp corner, and further improves the local demagnetizing resistance of the magnetic steel.
Drawings
FIG. 1 is a schematic view of a rotor sheet structure;
FIG. 2 is a schematic structural diagram of a rotor punching sheet single-pole magnetic steel;
FIG. 3 is a schematic view of a conventional rotor blade;
FIG. 4 is a schematic view of a stator lamination structure;
fig. 5 is an enlarged schematic view of a in fig. 4.
FIG. 6 is a no-load back-emf waveform of the present application;
FIG. 7 is a graph of no-load back-emf Fourier analysis;
fig. 8 and 9 are electromagnetic force simulation calculation diagrams;
fig. 10 and 11 are electromagnetic force harmonic analysis diagrams;
fig. 12 and 13 are graphs showing the multiplication of the starting torque;
FIG. 14 is a plot of nominal load pull-in moment of inertia multiples;
FIG. 15 is a demagnetization field pattern.
The actual correspondence between each label and the part name of the invention is as follows:
10. squirrel cage bar holes; 20. a first magnetic steel slot; 21. positioning a spigot; 30. a second magnetic steel slot; 40. a magnetic isolation bridge; 50. an open slot; 51. the groove wedge is a clamping groove.
Detailed Description
For ease of understanding, the specific construction and operation of the present invention is further described herein with reference to FIGS. 1-15:
example 1
The specific structure of the invention is shown in fig. 1-5, the main structure of the invention comprises a stator punching sheet and a rotor punching sheet, the stator punching sheet adopts a full circle structure, and seven twelve open slots 50 in total adopt hard coil windings. The stator punching sheet opening groove 50 is rectangular, a groove wedge clamping groove 51 is arranged near the groove opening, and the groove wedge clamping groove 51 is used for clamping a stator groove wedge.
The rotor punching sheet is provided with six magnetic pole grooves, each magnetic pole groove consists of V + I-shaped magnetic steel grooves, and rectangular squirrel cage bar holes 10 are uniformly distributed on the periphery of each magnetic pole groove. The shape and layout of the magnetic steel slots are reasonably designed in a limited space, and the magnetic circuit design of other parts of the stator and rotor punching sheets is combined, so that the no-load back electromotive force waveform is optimized as shown in figure 6, the harmonic content in the harmonic no-load back electromotive force is reduced as shown in figure 7, and the torque ripple, vibration and noise of the motor are improved.
In order to reduce magnetic leakage and optimize electromagnetic force harmonic waves of the motor, different from the conventional self-starting rotor punching sheet, the first magnetic steel groove 20 and the magnetic isolation bridge at the outer circle edge are not positioned below the squirrel cage bar hole 20 but on the outer circle edge of the punching sheet. The number of the magnetic isolation bridges 40 is reduced while the structural strength of the rotor is ensured, so that the magnetic leakage of the rotor is reduced, and the design cost of the motor is reduced; meanwhile, the magnetic isolation bridge 40 of the first magnetic steel groove 20 is positioned between the two squirrel cage bar holes 10, and a certain change space is reserved at the position of the magnetic isolation bridge 40, so that the air gap flux density waveform can be conveniently finely adjusted, the harmonic content in electromagnetic force analysis can be further optimized, and the purposes of improving the torque pulsation, vibration and noise of the motor can be achieved. The radial and tangential electromagnetic forces are analyzed as shown in fig. 8-11.
Preferably, each pole magnetic pole groove is a V + I-shaped magnetic steel groove, a magnetic isolation bridge 40 is arranged between the long edge ends of the two first magnetic steel grooves 20, the two first magnetic steel grooves 20 are symmetrically arranged to form a I-shaped groove group, the two second magnetic steel grooves 30 are connected end to form a I-shaped structure, the two I-shaped structures are symmetrically arranged to form a V-shaped groove group, the I-shaped groove group and the V-shaped groove group are combined to form a V + I-shaped magnetic pole groove, and N, S poles are distributed in a crossed manner.
Preferably, the number of the rotor cage bar holes 10 is sixty, and the number of the rotor cage bar holes is preferably matched with the number of the stator slots seventy-two. The seventy-two and sixty grooves are matched, the shape of the squirrel cage bar hole 10 is designed, and the integral design of the motor is matched, so that the starting torque and the pull-in torque of the motor are improved on the premise of strictly controlling the starting current, and the starting and pull-in synchronous rotating speed capacity of the motor is improved. The starting torque and starting current simulation data are shown in fig. 12 and 13, and the pull-in capability simulation is shown in fig. 14.
In order to improve the demagnetization resistance of the magnetic steel, the groove shape of the magnetic steel is optimally designed through a magnetic circuit, a magnetic steel positioning spigot 21 is arranged on the upper part of a V-shaped included angle, and the magnetic steel positioning spigot 21 is arranged on the upper part of the linear magnetic steel. The magnetic circuit design of the spigot effectively guides the trend of the reverse demagnetizing field as shown in figure 15, effectively protects the demagnetization effect of the reverse demagnetizing field on the sharp corners of the magnetic steel, and further improves the local demagnetization resistance of the magnetic steel.
In order to solve the laminating problem of the rotor core, twelve round holes are uniformly distributed at the pitch circle of the middle position of the rotor punching sheet and are used as firm bolts when the rotor core is laminated.
The invention aims to solve the heat dissipation problem of the motor, the motor adopts an air-to-air cooling structure, and the stator iron core and the rotor iron core are both provided with air ducts.
And further, on the basis of the overall layout of the comprehensive rotor punching sheet, the diameter of the inner hole of the rotor is enlarged as much as possible, and the ventilation area of the inner hole of the rotor is increased.
The invention aims to solve the problems of fixation of a motor rotor punching sheet in the circumferential direction of a rotor radial plate shaft and torque transmission, and a key slot hole is formed in an inner hole of a rotor.
Example 2
A motor using a high-voltage self-starting permanent magnet motor punching sheet.
It will, of course, be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (9)
1. The utility model provides a high pressure self-starting permanent-magnet machine is towards piece which characterized in that: the rotor punching sheet is provided with a magnetic steel groove, the end part of the magnetic steel groove is positioned between two adjacent squirrel cage bar holes (10), and a magnetic separation bridge (40) is arranged between the two end parts of the magnetic steel groove and the outer edge of the rotor punching sheet.
2. The high-voltage self-starting permanent magnet motor punching sheet according to claim 1, wherein the number of the squirrel cage bar holes (10) between the two end parts of the magnetic steel slots is even.
3. The high-voltage self-starting permanent magnet motor punching sheet according to claim 1, wherein the magnetic steel slots comprise two L-shaped first magnetic steel slots (20), a magnetic isolation bridge (40) is arranged between the long-side ends of the two first magnetic steel slots (20), the two first magnetic steel slots (20) (20) are symmetrically arranged to form a one-line slot group, and the short-side ends of the two first magnetic steel slots (20) are located between the two cage bar holes (10).
4. The high-voltage self-starting permanent magnet motor punching sheet according to claim 3, further comprising second magnetic steel grooves (30), wherein the two second magnetic steel grooves (30) are connected end to form a one-line structure, the two one-line structures are symmetrically arranged to form a V-shaped groove group, the first magnetic steel groove (20) is located in an opening of the V-shaped groove group, and a symmetry axis of the one-line groove group is coincident with a symmetry axis of the V-shaped groove group.
5. The high-voltage self-starting permanent magnet motor punching sheet according to claim 4, wherein the linear groove group and the V-shaped groove group are combined to form magnetic pole grooves in a V + linear structure, the rotor punching sheet is provided with six magnetic pole grooves, the six magnetic pole grooves are equidistantly distributed on the rotor punching sheet along the circumference, and N, S poles are uniformly distributed in a crossed manner.
6. The high-voltage self-starting permanent magnet motor punching sheet according to claim 1, wherein the rotor punching sheet structure is a full circle structure, sixty cage bar holes (10) are uniformly distributed on the outer portion of the rotor punching sheet structure, and the sixty cage bar holes (10) are uniformly distributed on the edge of the punching sheet along the circumference at equal intervals.
7. The high-voltage self-starting permanent magnet motor punching sheet according to claim 1, further comprising a stator punching sheet matched with the rotor punching sheet, wherein the stator punching sheet is of a full-circle structure, and seventy-two open grooves (50) are distributed on the stator punching sheet at equal intervals along the circumference.
8. The high-voltage self-starting permanent magnet motor punching sheet according to claim 8, wherein a slot notch of the open slot (50) is provided with a slot wedge slot (51).
9. A motor using the high-voltage self-starting permanent magnet motor punching sheet as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181402.2A CN113904473A (en) | 2021-10-11 | 2021-10-11 | High-voltage self-starting permanent magnet motor punching sheet and motor using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181402.2A CN113904473A (en) | 2021-10-11 | 2021-10-11 | High-voltage self-starting permanent magnet motor punching sheet and motor using same |
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| Publication Number | Publication Date |
|---|---|
| CN113904473A true CN113904473A (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111181402.2A Pending CN113904473A (en) | 2021-10-11 | 2021-10-11 | High-voltage self-starting permanent magnet motor punching sheet and motor using same |
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| CN (1) | CN113904473A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1198731A (en) * | 1997-07-22 | 1999-04-09 | Matsushita Electric Ind Co Ltd | Motor using rotor with buried permanent magnet therein |
| CN2862483Y (en) * | 2005-10-31 | 2007-01-24 | 上海日立电器有限公司 | Rotor structure for asynchrony-started permanent magnetic synchrony motor |
| CN102545432A (en) * | 2011-12-31 | 2012-07-04 | 浙江大学 | Self-starting permanent magnet synchronous motor rotor adopting conductive sleeve |
| CN214255899U (en) * | 2020-12-30 | 2021-09-21 | 安徽明腾永磁机电设备有限公司 | High-voltage self-starting permanent magnet motor stator punching sheet, rotor punching sheet and motor |
-
2021
- 2021-10-11 CN CN202111181402.2A patent/CN113904473A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1198731A (en) * | 1997-07-22 | 1999-04-09 | Matsushita Electric Ind Co Ltd | Motor using rotor with buried permanent magnet therein |
| CN2862483Y (en) * | 2005-10-31 | 2007-01-24 | 上海日立电器有限公司 | Rotor structure for asynchrony-started permanent magnetic synchrony motor |
| CN102545432A (en) * | 2011-12-31 | 2012-07-04 | 浙江大学 | Self-starting permanent magnet synchronous motor rotor adopting conductive sleeve |
| CN214255899U (en) * | 2020-12-30 | 2021-09-21 | 安徽明腾永磁机电设备有限公司 | High-voltage self-starting permanent magnet motor stator punching sheet, rotor punching sheet and motor |
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Application publication date: 20220107 |