CN105305685A - Permanent magnet synchronous direct-drive motor - Google Patents
Permanent magnet synchronous direct-drive motor Download PDFInfo
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- CN105305685A CN105305685A CN201510822404.3A CN201510822404A CN105305685A CN 105305685 A CN105305685 A CN 105305685A CN 201510822404 A CN201510822404 A CN 201510822404A CN 105305685 A CN105305685 A CN 105305685A
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- magnet synchronous
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Abstract
The invention discloses a permanent magnet synchronous direct-drive motor. A rotor iron core sleeves a shaft. The outer periphery of the rotor iron core is evenly equipped with a plurality of semi-open slots. A plurality of permanent magnets are adhered to the outer periphery of the rotor iron core. Epoxy resin is arranged among the permanent magnets and among the semi-open slots through embedding. The two end faces of the rotor iron core are equipped with non-magnetic-conductive metal end plates. A stator iron core of a stator is evenly equipped with a plurality of open slots at the periphery. Notches of the open slots face the inner side of the stator, and stator windings are disposed in the open slots respectively. The notches of the open slots are provided with magnetic conductive blocks, and are plugged by the magnetic conductive blocks. The motor of the invention is increased in pass mass ratio, exhibits high structural reliability, is easy to manufacture, and can response quickly. The harmonic wave content of an air gap magnetic field of the permanent magnet motor and the rotor loss of the motor are reduced, the magnetic leakage coefficient and the reactance of the motor are increased, short circuit currents are minimized, the operating points of the permanent magnets are improved, and the reliability of the permanent magnet synchronous direct-drive motor is improved.
Description
Technical field
The present invention relates to a kind of permanent magnet synchronous direct-driven motor, especially relate to the rotor of permanent magnet synchronous direct-driven motor and the structure of stator.
Background technology
The advantages such as permagnetic synchronous motor has high efficiency, high power density, overload capacity is strong, volume is little, lightweight, are widely applied in track traffic and industrial automation in recent years.
Conventional drives adopts the scheme of high-speed permanent magnetic synchronous motor acceleration and deceleration machine to realize low-speed direct driving and runs, but there is the problems such as efficiency is low, noise is large, maintenance cost is high, environmental pollution is serious; And permanent magnet synchronous direct-driven motor saves intermediate transmission mechanism, solve above problem, become the focus of track traffic and industrial automation research gradually.
Current traditional permanent magnet synchronous direct-driven motor, rotor adopts silicon steel sheet to be overrided to form, complex structure, and anti-vibrating and impact is indifferent, and reliability is not high; Rotor magnetic circuit structural adopts embedded or surface-mount type, and embedded magnetic structure magnet steel is fixed, but weight is large; Surface-mount type magnetic structure magnet steel manufacturing process is complicated, and reliability is not high, and weight is non-the lightest.
Tradition permanent magnet synchronous direct-driven motor, stator adopts open slot structure, and in motor rotary course, the changing greatly of magnetic field in air gap, the harmonic content in air-gap field improves, and core loss and rotor eddy current loss increase, and location torque and torque pulsation simultaneously increases.On the other hand, adopt this trench structure, the magnetic leakage factor of motor can reduce, and causes leakage reactance to reduce, and inductance reduces, and peak value short circuit current increases, and reduces permanent magnet working point in a short-circuit situation, improves the risk of permanent magnet short circuit loss of excitation.
Along with popularizing of power electronic device, magneto many employings frequency converter drags, in motor operation course, adopt frequency converter dragging can increase the harmonic content injecting stator winding electric current, further increase the harmonic content in motor gas-gap magnetic field, improve fixed core loss, rotor eddy current loss and the torque pulsation of motor.
Compared with stator, the radiating condition of rotor is poor, and the raising of rotor eddy current loss, the working temperature of permanent magnet can be improved, the degaussing flex point of permanent magnet is improved, add the risk that track traffic direct driving motor loss of excitation burns.Especially under this operating mode of high temperature short circuit.
Summary of the invention
Technical problem to be solved by this invention, be the defect overcoming prior art existence, propose a kind of permanent magnet synchronous direct-driven motor, improve the structure of rotor and stator, rotor weight is light, reliability is high, stator structure, makes the harmonic content of magneto air-gap field and rotor loss reduce, adds motor flux leakage coefficient and reactance.
Permanent magnet synchronous direct-driven motor of the present invention, comprises axle, rotor core and stator; Rotor core suit on the shaft; It is characterized in that: evenly have some semi-enclosed slots along described rotor core outer circumference surface, described semi-enclosed slot is parallel to described axle; Rotor core outer circumference surface posts some permanent magnets; Embedding has epoxy resin between each permanent magnet and in each semi-enclosed slot; Rotor core two end faces are furnished with non-magnetic metal end plate; Each permanent magnet and two non-magnetic metal end plate periphery colligation glass tapes.
Described semi-enclosed slot, bottom inner diameter is little, and middle internal diameter is large, and notch indent, in groove shapes, rotor core is magnetic conductive metal material.
Each permanent magnet bottom surface described is equipped with boss, and permanent magnet boss embeds rotor core semi-enclosed slot notch, and permanent magnet is alternately arranged along rotor core circumference N, S pole, axial same polarity segmentation arrangement.
Further prioritization scheme is: described stator is made up of stator core, some stator winding; Stator core circumferentially face is evenly provided with some open slots, and the notch of each open slot is inside stator, and each stator winding is located in each open slot respectively; It is characterized in that: all arrange magnetic inductive block at each open slot notch place, magnetic inductive block is by the shutoff of each open slot notch.The harmonic content of magneto air-gap field can be effectively reduced, reduce rotor loss, increase motor flux leakage coefficient and reactance, reduce short circuit current, improve the working point of permanent magnet, improve the reliability of permanent magnet synchronous direct-driven motor.Described magnetic inductive block can be rectangle or abnormity, can be made by the composite material of ferromagnetic material or ferromagnetic material and resin.
The present invention can be widely used in track traffic and industrial automation, and improve power of motor mass ratio, structural reliability is high, and manufacturing process is simple, motor fast response time.Reduce the harmonic content of magneto air-gap field, reduce rotor loss, increase motor flux leakage coefficient and reactance, reduce short circuit current, improve the working point of permanent magnet, improve the reliability of permanent magnet synchronous direct-driven motor.
Accompanying drawing explanation
Fig. 1 is the rotor radial sectional view of a kind of permanent magnet synchronous direct-driven motor of the present invention.
Fig. 2 is the rotor core 3 dimensional drawing of a kind of permanent magnet synchronous direct-driven motor of the present invention.
Fig. 3 is the permanent magnet 3 dimensional drawing of the rotor of a kind of permanent magnet synchronous direct-driven motor of the present invention.
Fig. 4 be a kind of permanent magnet synchronous direct-driven motor rotor of the present invention each permanent magnet between and the epoxy resin 3 dimensional drawing that formed after encapsulated epoxy resin in each semi-enclosed slot.
Fig. 5 is non-magnetic metal end plate (ring-type) 3 dimensional drawing of the rotor of a kind of permanent magnet synchronous direct-driven motor of the present invention.
Fig. 6 is the 3 dimensional drawing of the rotor of a kind of permanent magnet synchronous direct-driven motor of the present invention.
Fig. 7 is the longitudinal section view of a kind of permanent magnet synchronous direct-driven motor stator of the present invention.
Fig. 8 is the scheme of installation of the magnetic inductive block of a kind of permanent magnet synchronous direct-driven motor stator of the present invention.
Embodiment
Below, referring to figs. 1 through Fig. 8, the present invention is described in further details.
Fig. 1 is the radial section figure of the rotor of a kind of permanent magnet synchronous direct-driven motor of the present invention.As shown in Figure 1, this rotor comprises: glass tape 101, permanent magnet 102, rotor core 104, axle 105.On described axle 105, hot jacket rotor core 104 and the non-magnetic metal end plate 113(in side are as shown in Figure 5,6).Evenly have some semi-enclosed slots 107 along described rotor core outer circumference surface, described semi-enclosed slot is parallel to described axle 105.Rotor core 104 outer circumference surface is equipped with permanent magnet 102, and between permanent magnet 102 and rotor core 104, contact-making surface is coated with glue bond.Between each permanent magnet, embedding has epoxy resin 103 in gap and in each semi-enclosed slot.After epoxy resin filling, at described another non-magnetic metal end plate of axle 105 opposite side hot jacket.At described two non-magnetic metal end plates and permanent magnet 102 outer surface overall binding glass tape 101, as shown in Figure 6.
Fig. 2 is the rotor core 3 dimensional drawing of a kind of permanent magnet synchronous direct-driven motor rotor of the present invention.As shown in Figure 2, this rotor core 104 possesses: teeth portion 106, semi-enclosed slot 107, yoke portion 108 and groove 114.Described teeth portion 106, semi-enclosed slot 107 and yoke portion 108 be the optimal design gained when not affecting power density and stress all.Described groove 114 is positioned at inside rotor core 104.Described rotor core 104 is magnetic conductive metal material, can adopt the machining or shaping rear machine work of die sinking.
Fig. 3 is the permanent magnet 3 dimensional drawing of the rotor of a kind of permanent magnet synchronous direct-driven motor of the present invention.As shown in Figure 3, there is boss 109 this permanent magnet 102 inner circle side, boss center line overlaps with permanent magnet center line, in manufacture process, rotor core exterior surface gluing, permanent magnet 102 boss embeds in rotor core semi-enclosed slot notch, has assembled successively, permanent magnet 102 is alternately arranged along rotor core 104 circumferential N, S, axial same polarity segmentation arrangement.
Fig. 4 is the shaped three dimensional stereogram after the epoxy resin encapsulated of a kind of permanent magnet synchronous direct-driven motor rotor of the present invention.As shown in Figure 4, the shape after this epoxy resin encapsulated is mouse cage shape, and it possesses: semi-closed port channel-shaped 110, ring-type 111 and sheet 112.Described semi-closed port channel-shaped 110 is positioned at semi-enclosed slot.Described ring-type 111 is between axial adjacent permanent magnet 102.Described sheet 112 is between axial adjacent permanent magnet 102.Described semi-closed port channel-shaped 110, ring-type 111 and sheet 112 contribute to improving rotor reliability, reduce rotor weight.
Fig. 5 is the non-magnetic metal end plate 3 dimensional drawing of the rotor of a kind of permanent magnet synchronous direct-driven motor of the present invention.As shown in Figure 5, this non-magnetic metal end plate is ring-type, and non-magnetic metal material is made, and external diameter is slightly less than rotor core 104 diameter and 2 times of magnet thickness sums, is assembled on axle 105 by the mode of hot jacket.
Fig. 6 is the rotor of a kind of permanent magnet synchronous direct-driven motor of the present invention and the 3 dimensional drawing of axle.As shown in Figure 6, this rotor adopts rotor scheme of the present invention, and simple and reliable for structure, quality is low.
Fig. 7 is the sectional view of the stator of a kind of permanent magnet synchronous direct-driven motor of the present invention.As shown in Figure 7, described stator by stator iron, 115, some stator winding 116 form.Stator core circumferentially face is evenly provided with some open slots, and the notch of each open slot is inside stator, and each stator winding 116 is located in each open slot respectively.All arrange magnetic inductive block 117 at each open slot notch place, magnetic inductive block is by the shutoff of each open slot notch.The present invention, at the stator rabbet place of traditional permanent magnet synchronous direct-driven motor, increases magnetic inductive block 117.The harmonic content of magneto air-gap field can be effectively reduced, reduce rotor loss, increase motor flux leakage coefficient and reactance, reduce short circuit current, improve the working point of permanent magnet, improve the reliability of permanent magnet synchronous direct-driven motor.
Fig. 8 is the mounting means of the magnetic inductive block of a kind of permanent magnet synchronous direct-driven motor stator of the present invention, and as shown in Figure 8, magnetic inductive block is arranged on the nearly air gap side of notch of stator core open slot, can be rectangle or abnormity.
Claims (4)
1. permanent magnet synchronous direct-driven motor, comprises axle, rotor core and stator; Rotor core suit on the shaft; It is characterized in that: evenly have some semi-enclosed slots along described rotor core outer circumference surface, described semi-enclosed slot is parallel to described axle; Rotor core outer circumference surface posts some permanent magnets; Embedding has epoxy resin between each permanent magnet and in each semi-enclosed slot; Rotor core two end faces are furnished with non-magnetic metal end plate; Each permanent magnet and two non-magnetic metal end plate periphery colligation glass tapes.
2. permanent magnet synchronous direct-driven motor according to claim 1, it is characterized in that: described semi-enclosed slot, bottom inner diameter is little, and middle internal diameter is large, and notch indent, in groove shapes, rotor core is magnetic conductive metal material.
3. permanent magnet synchronous direct-driven motor according to claim 1, it is characterized in that: each permanent magnet bottom surface described is equipped with boss, permanent magnet boss embeds rotor core semi-enclosed slot notch, and permanent magnet is alternately arranged along rotor core circumference N, S pole, axial same polarity segmentation arrangement.
4. permanent magnet synchronous direct-driven motor according to claim 1, is characterized in that: described stator is made up of stator core, some stator winding; Stator core circumferentially face is evenly provided with some open slots, and the notch of each open slot is inside stator, and each stator winding is located in each open slot respectively; All arrange magnetic inductive block at each open slot notch place, magnetic inductive block is by the shutoff of each open slot notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510822404.3A CN105305685B (en) | 2015-11-24 | 2015-11-24 | A kind of permanent magnet synchronous direct-driven motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510822404.3A CN105305685B (en) | 2015-11-24 | 2015-11-24 | A kind of permanent magnet synchronous direct-driven motor |
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| Publication Number | Publication Date |
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| CN105305685A true CN105305685A (en) | 2016-02-03 |
| CN105305685B CN105305685B (en) | 2017-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510822404.3A Active CN105305685B (en) | 2015-11-24 | 2015-11-24 | A kind of permanent magnet synchronous direct-driven motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245361A (en) * | 2018-10-08 | 2019-01-18 | 珠海格力电器股份有限公司 | motor rotor, motor and air conditioner |
| CN111555489A (en) * | 2019-02-08 | 2020-08-18 | 株式会社日立产业机器 | Rotating electrical machine and elevator hoist system |
| CN111917208A (en) * | 2020-09-02 | 2020-11-10 | 无锡赛盈动力科技有限公司 | Combined magnetic steel of tricycle driving motor and assembly process thereof |
| CN111987827A (en) * | 2020-08-20 | 2020-11-24 | 重庆赛力盟电机有限责任公司 | Low-speed load direct-drive permanent magnet motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10174396A (en) * | 1996-12-04 | 1998-06-26 | Denso Corp | Rotating electric machine |
| CN102013778A (en) * | 2010-12-13 | 2011-04-13 | 哈尔滨工业大学 | Permanent magnet synchronous motor with wide field-weakening and speed regulation range |
| CN202737714U (en) * | 2012-06-06 | 2013-02-13 | 春城控股集团有限公司 | Brushless permanent magnetism direct current motor with sectional offset high speed rotor magnetic pole |
| CN203554105U (en) * | 2013-11-22 | 2014-04-16 | 西安正麒电气有限公司 | High-speed permanent magnet motor rotor protective structure |
| CN205123535U (en) * | 2015-11-24 | 2016-03-30 | 南京埃斯顿自动控制技术有限公司 | Synchronous motor that directly drives of permanent magnetism |
-
2015
- 2015-11-24 CN CN201510822404.3A patent/CN105305685B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10174396A (en) * | 1996-12-04 | 1998-06-26 | Denso Corp | Rotating electric machine |
| CN102013778A (en) * | 2010-12-13 | 2011-04-13 | 哈尔滨工业大学 | Permanent magnet synchronous motor with wide field-weakening and speed regulation range |
| CN202737714U (en) * | 2012-06-06 | 2013-02-13 | 春城控股集团有限公司 | Brushless permanent magnetism direct current motor with sectional offset high speed rotor magnetic pole |
| CN203554105U (en) * | 2013-11-22 | 2014-04-16 | 西安正麒电气有限公司 | High-speed permanent magnet motor rotor protective structure |
| CN205123535U (en) * | 2015-11-24 | 2016-03-30 | 南京埃斯顿自动控制技术有限公司 | Synchronous motor that directly drives of permanent magnetism |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245361A (en) * | 2018-10-08 | 2019-01-18 | 珠海格力电器股份有限公司 | motor rotor, motor and air conditioner |
| CN111555489A (en) * | 2019-02-08 | 2020-08-18 | 株式会社日立产业机器 | Rotating electrical machine and elevator hoist system |
| CN111987827A (en) * | 2020-08-20 | 2020-11-24 | 重庆赛力盟电机有限责任公司 | Low-speed load direct-drive permanent magnet motor |
| CN111917208A (en) * | 2020-09-02 | 2020-11-10 | 无锡赛盈动力科技有限公司 | Combined magnetic steel of tricycle driving motor and assembly process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105305685B (en) | 2017-07-18 |
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Effective date of registration: 20190717 Address after: 211100 No. 155 General South Road, Jiangning Economic and Technological Development Zone, Nanjing City, Jiangsu Province Patentee after: Nanjing Estun Automation Co., Ltd. Address before: 211100 Jiangning Economic Development Zone, Jiangsu Province, general Avenue, No. 155, No. Patentee before: Nanjing Estun Automatic Control Technology Co., Ltd. |
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