CN213585314U - Special permanent magnet alternating current synchronous motor structure for frequency conversion - Google Patents
Special permanent magnet alternating current synchronous motor structure for frequency conversion Download PDFInfo
- Publication number
- CN213585314U CN213585314U CN202023016863.8U CN202023016863U CN213585314U CN 213585314 U CN213585314 U CN 213585314U CN 202023016863 U CN202023016863 U CN 202023016863U CN 213585314 U CN213585314 U CN 213585314U
- Authority
- CN
- China
- Prior art keywords
- magnetic pole
- motor rotor
- electric motor
- eccentric
- distribution
- Prior art date
- 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.)
- Active
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 8
- 238000013016 damping Methods 0.000 claims abstract description 28
- 230000005389 magnetism Effects 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model discloses a special permanent magnetism alternating current synchronous machine structure of frequency conversion, including electric motor rotor, be equipped with shaft hole and fixed orifices among the electric motor rotor, be equipped with more than two sets of centers on among the electric motor rotor the magnetic pole groove of shaft hole symmetric distribution, be close to the edge on the electric motor rotor and be equipped with the damping groove of round eccentric distribution, eccentric distribution the central line in damping groove with be equipped with eccentric contained angle alpha between electric motor rotor's the magnetic pole central line. The utility model designs the magnetic pole slot and the rotor structure with the eccentric damping slot by combining the analytic data of the magnetic pole distribution structure of the motor, the conductor distribution rule, the special winding distribution, the slot matching, the tooth high harmonic wave and the like, can effectively eliminate and weaken the harmonic component of the frequency converter, and effectively reduce the noise when the motor operates; meanwhile, the asynchronous dragging can be carried out on the motor starting, the starting performance of the motor is improved, and therefore the quality of the permanent magnet variable frequency alternating current synchronous motor is greatly improved.
Description
Technical Field
The utility model relates to an AC synchronous machine technical field especially relates to a special permanent magnetism AC synchronous machine structure of frequency conversion.
Background
At present, the permanent magnet variable frequency alternating current synchronous motor is widely applied to the fields of household constant pressure water supply equipment, variable frequency air conditioners, washing machines, fans and the like, and achieves the effects of constant pressure control and high efficiency and energy conservation through variable frequency speed regulation. Especially in the field of domestic constant-pressure water supply equipment, a constant-pressure water supply system solution mainly comprising a permanent-magnet alternating-current synchronous electric pump, a variable-frequency controller and a pressure sensor is adopted, and the constant-pressure water supply system has the advantages of high cost performance, stable and reliable operation and the like.
Because the output phase voltage of the frequency converter contains a large amount of harmonic components except the fundamental component, especially the low-order harmonic component is the most, the phase current contains more harmonic components when the motor runs, and the waveform of the harmonic components is greatly different from the waveform of the sinusoidal current, so that the permanent magnet alternating current synchronous motor generates harmonic electromagnetic noise, and the problems that the electromagnetic noise of the existing household motor products is large and the electromagnetic noise is difficult to process in the prior art are caused.
Because the household products have particularly strict requirements on noise, the running noise of the permanent magnet variable frequency alternating current synchronous motor is a key evaluation index of the household motor products, and the key for designing and manufacturing the corresponding permanent magnet variable frequency alternating current synchronous motor is how to eliminate the electromagnetic harmonic noise caused by variable frequency control to the maximum extent and improve the product quality.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a permanent-magnet ac synchronous motor structure for frequency conversion, which combines the magnetic pole distribution structure of the motor, the conductor distribution rule, the special winding distribution, the slot matching and the tooth height harmonic analysis data, to design the magnetic pole slot and the rotor structure with the eccentric damping slot, so as to effectively cancel and weaken the harmonic component of the frequency converter, and effectively reduce the noise when the motor operates; meanwhile, the asynchronous dragging can be carried out on the motor starting, the starting performance of the motor is improved, and therefore the quality of the permanent magnet variable frequency alternating current synchronous motor is greatly improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a special permanent magnetism AC synchronous machine structure of frequency conversion, includes electric motor rotor, be equipped with shaft hole and fixed orifices among the electric motor rotor, be equipped with more than two sets of centers on among the electric motor rotor the magnetic pole groove of shaft hole symmetric distribution, the last edge that is close to of electric motor rotor is equipped with the damping groove of the eccentric distribution of round, the central line in the damping groove of eccentric distribution with be equipped with eccentric contained angle alpha between electric motor rotor's the magnetic pole central line.
Furthermore, the magnetic pole slots comprise four groups, and each magnetic pole slot comprises two small magnetic pole slots symmetrically arranged on two sides of the magnetic pole center line of the motor rotor.
Furthermore, a communicating narrow groove communicated with the outer cylinder of the motor rotor is arranged in the damping groove.
Further, the cross-sectional shape of the damping groove is circular or polygonal.
The utility model discloses following beneficial effect has:
1. the utility model designs the magnetic pole slot and the rotor structure with the eccentric damping slot by combining the analytic data of the magnetic pole distribution structure of the motor, the conductor distribution rule, the special winding distribution, the slot matching, the tooth high harmonic wave and the like, can effectively eliminate and weaken the harmonic component of the frequency converter, and effectively reduce the noise when the motor operates; meanwhile, the asynchronous dragging can be carried out on the motor starting, the starting performance of the motor is improved, and therefore the quality of the permanent magnet variable frequency alternating current synchronous motor is greatly improved.
2. The utility model discloses eccentric contained angle and damping groove eccentric distance on the rotor between the central line of the damping groove of eccentric distribution on the rotor and electric motor rotor's magnetic pole central line calculate according to the motor magnetomotive force space-time unified principle, and the damping groove that sets up after the calculation can effectively eliminate converter harmonic component, effectively reduces the noise when motor operation.
Drawings
Fig. 1 is a schematic view of the structure of the special permanent-magnet ac synchronous motor for frequency conversion of the present invention.
Description of reference numerals:
1. a motor rotor; 11. a shaft hole; 12. a fixing hole; 13. a magnetic pole groove; 14. a damping slot; 141. and the narrow groove is communicated.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific embodiments:
referring to fig. 1, the structure of the special variable frequency permanent-magnet alternating-current synchronous motor comprises a motor rotor 1, wherein a shaft hole 11 and a fixing hole 12 are arranged in the motor rotor 1, more than two groups of magnetic pole slots 13 are arranged in the motor rotor 1 and symmetrically distributed around the shaft hole 11, a circle of damping slots 14 which are eccentrically distributed are arranged on the motor rotor 1 and close to the edge, and an eccentric included angle alpha is formed between the central line of the damping slots 14 which are eccentrically distributed and the central line of the magnetic pole of the motor rotor 1. The eccentric included angle alpha and the eccentric distance of the damping slot 14 on the rotor are calculated according to the motor magnetomotive force space-time unified principle.
The magnetic pole grooves 13 comprise four groups, and each group of magnetic pole grooves 13 comprises two small magnetic pole grooves symmetrically arranged on two sides of the magnetic pole center line of the motor rotor 1.
A communicating narrow groove 141 communicated with the outer cylinder of the motor rotor 1 is arranged in the damping groove 14. The cross-sectional shape of the damping groove 14 is circular or polygonal. And a stator groove matched with the damping groove 14 is arranged on a stator outside the motor rotor 1.
The utility model discloses the theory of operation:
although the center line of the damping slot is superposed with the center of the magnetic pole in the prior art, the damping slot is uniformly distributed on the rotor, but the permanent magnet motor has a salient pole structure, the magnetic circuit of the permanent magnet motor is asymmetric, and the damping winding is also asymmetric; when the device is operated, the effect of eliminating the tooth harmonic wave and/or the higher harmonic wave is not good, and even new higher harmonic wave can be generated.
And the utility model discloses the motor rotor 1 that well has eccentric formula damping groove 14 though structurally there is eccentric contained angle in magnetic line of force and motor rotor 1's magnetic pole central line, can balance the asymmetry of rotor magnetic circuit through the misalignment of damping groove 14 and magnetic pole central line during the rotation, reach a dynamic balance, thereby can effectively eliminate tooth harmonic and higher harmonic at the space deviation position and disturb, can fine adaptation converter to motor drive, reduce higher harmonic and disturb to the motor, and more can eliminate the electromagnetic noise that converter harmonic component produced by at utmost.
The above only is the detailed implementation manner of the present invention, not limiting the patent scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (4)
1. The utility model provides a special permanent magnetism AC synchronous machine structure of frequency conversion, includes electric motor rotor (1), be equipped with shaft hole (11) and fixed orifices (12) in electric motor rotor (1), its characterized in that: be equipped with more than two sets of centers on in electric motor rotor (1) shaft hole (11) symmetric distribution's magnetic pole groove (13), electric motor rotor (1) is gone up and is close to the edge and is equipped with damping groove (14) that the round eccentric distributes, and the eccentric distribution the central line of damping groove (14) with be equipped with eccentric contained angle alpha between electric motor rotor (1)'s the magnetic pole central line.
2. The structure of the special variable frequency permanent magnet alternating current synchronous motor according to claim 1, characterized in that: the magnetic pole grooves (13) comprise four groups, and each group of magnetic pole grooves (13) comprise two small magnetic pole grooves symmetrically arranged on two sides of a magnetic pole center line of the motor rotor (1).
3. The structure of the special variable frequency permanent magnet alternating current synchronous motor according to claim 1, characterized in that: and a communicating narrow groove (141) communicated with the outer cylinder of the motor rotor (1) is arranged in the damping groove (14).
4. The structure of the special variable frequency permanent magnet alternating current synchronous motor according to claim 1, characterized in that: the cross section of the damping groove (14) is circular or polygonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023016863.8U CN213585314U (en) | 2020-12-15 | 2020-12-15 | Special permanent magnet alternating current synchronous motor structure for frequency conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023016863.8U CN213585314U (en) | 2020-12-15 | 2020-12-15 | Special permanent magnet alternating current synchronous motor structure for frequency conversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213585314U true CN213585314U (en) | 2021-06-29 |
Family
ID=76550275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023016863.8U Active CN213585314U (en) | 2020-12-15 | 2020-12-15 | Special permanent magnet alternating current synchronous motor structure for frequency conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213585314U (en) |
-
2020
- 2020-12-15 CN CN202023016863.8U patent/CN213585314U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102185449A (en) | Self-starting permanent magnet motor with three-section-circular-arc magnetic pole structure | |
| CN205622461U (en) | Device of making an uproar falls in brushless motor | |
| CN112953151B (en) | An outer rotor motor with polygonal dovetail spliced magnetic steel structure | |
| CN210092990U (en) | A permanent magnet motor punch | |
| CN213585314U (en) | Special permanent magnet alternating current synchronous motor structure for frequency conversion | |
| CN204669112U (en) | A kind of multipole permanent magnet motor pole core structure | |
| Li et al. | Analysis, modeling, and verification of limited angle torque motors with irregular slot numbers for performance improvement | |
| Li et al. | A design method of the rotor auxiliary slot for the water-filled submersible induction motors | |
| CN101106290A (en) | A permanent magnetic synchronization motor | |
| CN208479303U (en) | Motor rotor and motor | |
| CN217904124U (en) | Magnetic pole deviation single-symmetry-axis motor rotor structure | |
| CN102163896B (en) | Brushless double-fed motor | |
| CN106300731B (en) | Motor rotor and variable frequency motor | |
| CN106253333B (en) | The method for improving full-power wind power converter power device reliability under gentle breeze | |
| CN203014513U (en) | Permanent magnet generator stator capable of reducing cogging torque | |
| CN105337433A (en) | Multi-polar permanent-magnet motor pole core structure | |
| CN206412846U (en) | Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure | |
| CN112415387A (en) | Method for evaluating influence of armature magnetomotive force harmonic waves on eddy current loss of permanent magnet rotor | |
| CN207265746U (en) | The groove fit structure of rotor | |
| CN201726286U (en) | Slot coordination of small-sized efficient three-phase asynchronous motor | |
| CN209860682U (en) | Rotor of sine wave magnetic field asynchronous starting permanent magnet synchronous motor | |
| CN211508754U (en) | Quasi-sinusoidal winding of high-voltage variable-frequency asynchronous motor | |
| CN205670737U (en) | High speed dual rotor AC asynchronization motor | |
| Gan et al. | Analysis of electromagnetic performance of the interior permanent magnet brushless DC motor with stator slot skewed structure based on quasi-3D moving electromagnetic-field circuit coupling calculation | |
| CN2485864Y (en) | Brushless D.C. motor with fractional slots |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |