CN111162613A - Multiphase skewed slot shift extremely-low vibration noise permanent magnet motor - Google Patents
Multiphase skewed slot shift extremely-low vibration noise permanent magnet motor Download PDFInfo
- Publication number
- CN111162613A CN111162613A CN202010006675.2A CN202010006675A CN111162613A CN 111162613 A CN111162613 A CN 111162613A CN 202010006675 A CN202010006675 A CN 202010006675A CN 111162613 A CN111162613 A CN 111162613A
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- permanent magnet
- stator
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- rotating shaft
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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
- H02K1/12—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
- H02K1/2706—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
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- 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)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a multiphase chute shift extremely low vibration noise permanent magnet motor, which comprises a stator and a rotor; the stator comprises a base and an iron core fixed on the inner wall of the base through a thermal sleeve, the iron core of the stator is provided with an inclined tooth socket, the iron core is provided with a multiphase Y-connection offset 30-degree coil winding, the outer surface of the base of the stator is provided with a heat dissipation rib plate, and two ends of the base are connected with end covers; the rotor comprises a rotating shaft, a rotating shaft bracket and a rotor yoke outside the rotating shaft bracket, wherein the surface of the rotor yoke is pasted with a permanent magnet, the permanent magnet is fixed on the rotor yoke through a pressing strip, the distribution of the permanent magnet on the rotor is different from that of a common permanent magnet motor rotor, the magnetic pole of the permanent magnet adopts a pole shifting form, and in addition, the two end faces of the rotating shaft, the rotating shaft bracket, the rotor yoke and the permanent magnet are fixed through end pressing plates; the motor obviously inhibits the harmonic electromotive force and harmonic magnetic electromotive force of the motor, reduces the cogging torque, further reduces the torque pulsation, and has better effect of reducing vibration and noise.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a permanent magnet synchronous motor with low vibration noise.
Background
The permanent magnet motor is widely applied due to high efficiency, excellent performance and various structural types. In a common permanent magnet synchronous motor, vibration and noise are inevitable, and the vibration noise greatly influences the stealth performance of equipment such as a naval vessel and the like and also influences the service life of the motor.
When the permanent magnet synchronous motor runs, if the cogging torque is large, the torque pulsation of the motor is increased, the vibration and noise of the motor are obviously increased, the probability of collision and abrasion of a rotor and a stator of the motor is increased, the heat generation of the motor is increased, and even the adverse effects of loss of magnetism of a permanent magnet, wear failure of a bearing, reduction of the insulation life of a stator winding and the like are caused.
Disclosure of Invention
The invention provides a permanent magnet motor with a multiphase chute shift with extremely low vibration noise, which aims to solve the problem of high vibration and noise of a permanent magnet synchronous motor, so that the torque pulsation of the permanent magnet synchronous motor is remarkably reduced, the vibration and noise of the motor are reduced, and a reliable basis is provided for inhibiting the vibration and noise of the permanent magnet synchronous motor.
In order to achieve the technical purpose, the technical scheme of the invention is to provide a multiphase chute very low vibration noise permanent magnet motor which comprises a stator and a rotor, wherein the stator comprises a stator base and a stator core fixed on the inner wall of the stator base through a thermal sleeve, an inclined tooth slot is formed in the stator core, a coil winding with m (m =3w, w is more than or equal to 2, and w is an integer) phase Y-phase offset of 30 degrees is arranged on the stator core, a heat dissipation rib plate is formed in the outer surface of the stator base, and two ends of the stator base are connected with end covers through screws and rabbets; the rotor comprises a rotating shaft, a rotating shaft bracket and a rotor yoke outside the rotating shaft bracket, a permanent magnet is fixed on the surface of the rotor yoke through a pressing strip, and two end faces of the rotating shaft, the rotating shaft bracket, the rotor yoke and the permanent magnet are fixed through end pressing plates;
the distribution of the permanent magnets on the rotor is different from that of a common permanent magnet motor rotor, and the magnetic poles of the permanent magnets adopt a downward moving pole form:
the number of the pole pairs of the rotor is p, the number of the stator slots is Z, all the permanent magnets are divided into s repeating units along the circumferential direction, the adjacent gamma permanent magnets are used as a repeating unit group, the repeating unit can be composed of one or more permanent magnets, s =2 p/gamma, gamma =1 when the number of the slots of each pole is an integer, namely each repeating unit is composed of one permanent magnet, when the number of the slots of each pole is a fraction, gamma = Ns/Z, namely each repeating unit is composed of gamma adjacent permanent magnets, and Ns is the least common multiple of the number of the permanent magnet poles 2p and the number of the stator slots Z.
Further, the coil winding is in 6-phase double Y shift by 30 degrees. The number of the stator slots is 72, and the number of the poles is 12.
The invention has the beneficial effects that: the harmonic magnetic potential and harmonic electric potential of the motor are reduced, the cogging torque is reduced, and the vibration noise is greatly reduced; compared with other types of motors, the motor can obviously reduce the vibration and noise of the motor, and has great economic value.
Drawings
FIG. 1 is a schematic structural view of the motor of the present invention;
FIG. 2 is a schematic view of the rotor of the present invention in a front view;
FIG. 3 is a side view of the rotor of the present invention;
fig. 4-6 are schematic diagrams comparing the non-movement and movement of the magnetic pole according to the present invention.
The figures are numbered: 1-stator, 1.1-stator core, 1.2-stator frame, 1.3-coil winding, 2-rotor, 2.1-rotating shaft bracket, 2.2-permanent magnet, 2.3-rotor yoke, 2.4-end pressure plate, 2.5-rotating shaft, 2.6-pressing strip.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a permanent magnet motor with extremely low vibration noise by a multiphase chute in order to inhibit the problem of large vibration and noise of the permanent magnet motor, so that the torque pulsation of the motor is obviously reduced, the vibration and noise of the motor are greatly reduced, and the permanent magnet motor has extremely high economic value and social benefit.
Referring to fig. 1 to 3, as a basic embodiment, the invention discloses a multiphase skewed slot multiphase shift extremely low vibration noise permanent magnet motor, which comprises a stator 1 and a rotor 2.
The stator 1 comprises a stator base 1.2 and a stator core 1.1 fixed on the inner wall of the stator base 1.2 through a thermal sleeve, wherein an inclined tooth slot is formed in the stator core 1.1, a multiphase Y-connection 30-degree offset coil winding 1.3 is arranged on the stator core 1.1, a heat dissipation rib plate is formed in the outer surface of the stator base 1.2, and two ends of the stator base 1.2 are connected with end covers through screws and rabbets.
The rotor 2 include pivot 2.5, pivot support 2.1, rotor yoke 2.3 outside the pivot support 2.1, the surface subsides of rotor yoke 2.3 have permanent magnet 2.2, permanent magnet 2.2 fixes on rotor yoke 2.3 through layering 2.6, the distribution of permanent magnet 2.2 on rotor 2 is different with general permanent-magnet machine rotor, permanent magnet 2.2 magnetic pole adopts the form of moving the utmost point, in addition pivot 2.5, pivot support 2.1, rotor yoke 2.3 and the both ends face of permanent magnet 2.2 are fixed through end clamp plate 2.4.
The stator 1 comprises a stator base 1.2 and a stator core 1.1 fixed on the inner wall of the stator base 1.2 through a thermal sleeve, wherein an inclined tooth slot is formed in the stator core 1.1, a coil winding 1.3 with m (m =3w, w is more than or equal to 2, and w is an integer) phase Y-phase offset of 30 degrees is arranged on the stator core 1.1, a heat dissipation rib plate is formed on the outer surface of the stator base 1.2, and two ends of the stator base 1.2 are connected with end covers through screws and rabbets.
The distribution of the permanent magnet 2.2 on the rotor 2 is different from that of the rotor 2 of a general permanent magnet motor, and the magnetic pole of the permanent magnet 2.2 adopts a downward moving pole form:
1) the number of pole pairs of the rotor 2 is p, the number of slots of the stator 1 is Z, all permanent magnets 2.2 of the whole motor are divided into s groups along the circumferential direction, the adjacent gamma permanent magnets 2.2 are used as a basic group, and s =2 p/gamma; when the number of slots per pole is an integer, each basic group consists of 2.2 permanent magnets, i.e. γ = 1; when the number of slots per pole is fractional, γ = Ns/Z.
2) Based on s repeating units formed by 2p permanent magnets (2.2), the offset group is shifted by an angle theta n along the circumferential direction, the theta n =2 pi/2 Ns gamma n (the shifting direction is always consistent in the shifting process), and two adjacent repeating units form a new repeating unit after the offset group is shifted, wherein the theta n represents the angle of the basic group offset when the nth harmonic wave is to be eliminated.
3) Based on s groups of permanent magnets 2.2, gamma adjacent permanent magnets 2.2 are set as offset groups, the offset groups are offset by an angle theta n along the circumferential direction, the theta n =2 pi/2 Ns gamma n (the offset direction is always consistent in the offset process), and a new basic group after offset is obtained, wherein the theta n represents the offset angle of the basic group when the nth harmonic wave is to be eliminated, and the Ns is the least common multiple of the number of permanent magnet poles 2p and the number of stator slots Z.
4) In the process of executing the migration, if s is larger than 1, the migration can be continued until s is smaller than or equal to 1, and the migration is completed; wherein the offset number is n, and a rotor magnetic pole form eliminating the nth harmonic of the cogging torque is obtained.
To further explain the pole-shifting technical solution of the present invention in detail, a 6-phase, 72-slot, 12-phase permanent magnet motor with extremely low vibration noise is taken as an example to explain the process of eliminating the first harmonic and the second harmonic of the cogging torque by offsetting:
firstly, the stator 1 is in the form of a skewed slot, the coil winding 1.3 is in a 6-phase double-Y shift 30-degree connection mode, the magnetic poles of the rotor 2 are subjected to the pole shifting steps, whether the number of slots per pole is an integer is judged, the number of slots per pole is 72, the number of poles is 12, the number of slots per pole is Z/2P =6, each permanent magnet 2.2 is used as a repeating unit, the motor permanent magnets 2.2 are numbered from P1 to P12 in the clockwise direction along the circumferential direction, and 12 repeating units are shown in figure 4, when the fundamental wave is eliminated, two adjacent repeating units are shifted, namely P2, P4, P6, P8, P10, P12 and the shift angle theta is theta1And (= 2 pi/2 × 72 × 1=2.5 °), and the offset angle of each permanent magnet 2.2 is shown in the following table (12-pole 72-slot motor magnetic pole offset angle table) for eliminating the cogging torque fundamental wave offset angle:
after offsetP1 and P2 as a novel repeat unit P1*P3 and P4 as a novel repeat unit P2*New six repeating units are formed, see fig. 4, and when the second harmonic is eliminated, two adjacent repeating units are shifted, i.e. P2*，P4*，P6*，P8*，P10*，P12*Offset angle of theta2And the shift angle of each new repeating unit is shown in the table to eliminate the cogging torque second harmonic shift angle, and the distribution form of the shifted rotor magnetic poles and the new repeating unit are shown in fig. 6.
The invention provides a permanent magnet motor with extremely low vibration noise and a multiphase chute shift, aiming at inhibiting the problem of high vibration and noise of the permanent magnet motor, and greatly reducing the vibration and noise of the motor.
It will be readily understood by those skilled in the art that the above examples are merely illustrative of the present invention and are not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. The utility model provides a low vibration noise permanent-magnet machine of polyphase skewed slot shift, includes stator (1) and rotor (2), its characterized in that:
the stator (1) comprises a stator base (1.2) and a stator core (1.1) fixed on the inner wall of the stator base (1.2) through a thermal sleeve, an inclined tooth socket is formed on the stator core (1.1), a coil winding (1.3) with the phase of m (m =3w, w is more than or equal to 2 and is an integer) Y-phase offset of 30 degrees is arranged on the stator core (1.1), a heat dissipation rib plate is formed on the outer surface of the stator base (1.2), and two ends of the stator base (1.2) are connected with end covers;
the rotor (2) comprises a rotating shaft (2.5), a rotating shaft support (2.1) and a rotor yoke (2.3) outside the rotating shaft support (2.1), a permanent magnet (2.2) is fixed on the surface of the rotor yoke (2.3) through a pressing strip (2.6), and end pressing plates (2.4) are fixed at two ends of the rotating shaft (2.5), the rotating shaft support (2.1), the rotor yoke (2.3) and the permanent magnet (2.2);
the permanent magnet (2.2) adopts the following pole moving form:
the number of pole pairs of the rotor (2) is p, the number of slots of the stator (1) is Z, all the permanent magnets (2.2) are divided into s groups along the circumferential direction, adjacent gamma permanent magnets (2.2) serve as a basic offset group, and s =2 p/gamma; when the number of the polar grooves is an integer, gamma =1, and when the number of the polar grooves is a fraction, gamma = Ns/Z, and Ns is the least common multiple of 2p and Z.
2. A polyphase skewed slots shifted very low vibration noise permanent magnet machine according to claim 1, characterized in that the coil windings (1.3) are 6-phase double Y-shifted by 30 °.
3. The polyphase skewed very low vibration noise permanent magnet machine according to claim 2, wherein the number of slots of the stator (1) is 72 and the number of poles is 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006675.2A CN111162613A (en) | 2020-01-03 | 2020-01-03 | Multiphase skewed slot shift extremely-low vibration noise permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006675.2A CN111162613A (en) | 2020-01-03 | 2020-01-03 | Multiphase skewed slot shift extremely-low vibration noise permanent magnet motor |
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| CN111162613A true CN111162613A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010006675.2A Pending CN111162613A (en) | 2020-01-03 | 2020-01-03 | Multiphase skewed slot shift extremely-low vibration noise permanent magnet motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116231893A (en) * | 2023-05-08 | 2023-06-06 | 河北辰昊传动设备有限公司 | Permanent magnet synchronous motor with notch on stator and direct-drive driving system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2390340Y (en) * | 1999-09-29 | 2000-08-02 | 深圳市贝来实验室 | Structure of multipole skewed slot permanent-magnet machine |
| CN202395540U (en) * | 2011-09-26 | 2012-08-22 | 佛山市南海晶惠普电子科技有限公司 | High-quality three-phase AC permanent magnetic servo synchronous motor |
| CN109728658A (en) * | 2018-11-27 | 2019-05-07 | 江苏大学 | A kind of novel five phases salient pole synchronous magnetic resistance motor and its suppressing method of torque pulsation |
| CN208986699U (en) * | 2018-12-10 | 2019-06-14 | 广东威灵汽车部件有限公司 | Rotor punching, rotor, motor and mold |
| CN209250465U (en) * | 2019-01-28 | 2019-08-13 | 河北炎合永磁电机制造有限公司 | Crane water cooling direct-drive permanent magnet synchronous motor |
| CN110365134A (en) * | 2019-07-22 | 2019-10-22 | 宁波华表机械制造有限公司 | A kind of permanent-magnetic synchronous motor stator body and permanent magnet synchronous motor |
-
2020
- 2020-01-03 CN CN202010006675.2A patent/CN111162613A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2390340Y (en) * | 1999-09-29 | 2000-08-02 | 深圳市贝来实验室 | Structure of multipole skewed slot permanent-magnet machine |
| CN202395540U (en) * | 2011-09-26 | 2012-08-22 | 佛山市南海晶惠普电子科技有限公司 | High-quality three-phase AC permanent magnetic servo synchronous motor |
| CN109728658A (en) * | 2018-11-27 | 2019-05-07 | 江苏大学 | A kind of novel five phases salient pole synchronous magnetic resistance motor and its suppressing method of torque pulsation |
| CN208986699U (en) * | 2018-12-10 | 2019-06-14 | 广东威灵汽车部件有限公司 | Rotor punching, rotor, motor and mold |
| CN209250465U (en) * | 2019-01-28 | 2019-08-13 | 河北炎合永磁电机制造有限公司 | Crane water cooling direct-drive permanent magnet synchronous motor |
| CN110365134A (en) * | 2019-07-22 | 2019-10-22 | 宁波华表机械制造有限公司 | A kind of permanent-magnetic synchronous motor stator body and permanent magnet synchronous motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116231893A (en) * | 2023-05-08 | 2023-06-06 | 河北辰昊传动设备有限公司 | Permanent magnet synchronous motor with notch on stator and direct-drive driving system |
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Application publication date: 20200515 |