CN202840895U - Low-cogging-torque flux-switching permanent magnet motor - Google Patents
Low-cogging-torque flux-switching permanent magnet motor Download PDFInfo
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- CN202840895U CN202840895U CN 201220391718 CN201220391718U CN202840895U CN 202840895 U CN202840895 U CN 202840895U CN 201220391718 CN201220391718 CN 201220391718 CN 201220391718 U CN201220391718 U CN 201220391718U CN 202840895 U CN202840895 U CN 202840895U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims description 70
- 230000005284 excitation Effects 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000010349 pulsation Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model provides a low-cogging-torque flux-switching permanent magnet motor, which comprises stator iron cores, an iron core axle and a permanent magnet. The iron core axle is arranged between adjacent stator iron cores and is close to an air gap side. The permanent magnet is arranged in The flux-switching permanent magnet motor has the obvious characteristics of high power density, convenient cooling operation, high efficiency and the like and is suitable for being operated at a high speed. Meanwhile, the cogging torque is reduced. When the motor is applied to a servo system, the torque pulsation problem of the motor during operation, especially during the low-speed operation, is effectively solved. When the motor is applied to a wind power generation system, the starting wind speed is effectively reduced and the output power of the wind power generation system is enlarged in the range of wind speeds.
Description
Technical field
The utility model belongs to the magneto technical field, is specifically related to a kind of Low gullet torque flux switch permanent magnet motor.
Background technology
Compare with electro-magnetic motor, magneto has the remarkable advantages such as volume is little, quality is light, efficient is high; Because it does not need excitation winding and dc excitation power, the collector ring and the brushgear that easily go wrong have been cancelled, simple in structure, reliable, therefore at wind power generation, miniature hydro-power generation, and the occasion such as compact internal combustion engine generating progressively applied, and especially adopts the direct-driving type wind power generation of permanent magnet generator to become now and has much attraction.In addition, China's rare earth resources is abundant, and the scientific research level of rare earth permanent-magnetic material and rare-earth permanent-magnet electric machine has also all reached international most advanced level, therefore, give full play to the resources advantage of China, the various magnetoes of greatly developing and promoting take rare-earth permanent-magnet electric machine as representative will have important construction value.
The tradition magneto adopts surface-adhered type, plug-in type or the technique such as embedded that permanent magnet is fixed in rotor mostly, like this, in motor operation course, will produce heat radiation difficulty, cross high temperature rise and cause the permanent magnet irreversible demagnetization, the problem thereby limiting motor is exerted oneself etc.For this problem, as far back as eighties of last century fifties, just there is the scholar that the stator permanent magnet motor has been carried out research.Different from the rotor permanent magnet motor, the stator permanent magnet motor all places stator with permanent magnet and armature winding, and simple rotor structure has not only improved the motor reliability of operation, and during rotor, also can play the effect of fan, the motor radiating performance is enhanced.Therefore, flux switch permanent magnet motor proposed once French scholar E.Hoang in 1997, just aroused great concern.
Yet, permanent magnet is placed stator, motor adopts the double-salient-pole structure, because poly-magnetic effect, when the flux switch permanent magnet motor air gap flux density increased, it is more serious that the cogging torque problem also becomes.So-called cogging torque is permanent magnet and the interactional result of slotted core in the magneto, produces vibration and noise in the time of will causing the motor operation.This moment is present in the magneto all the time, whether switch on irrelevant with motor, excessive peak-to-peak value not only can bring difficulty to electric motor starting, and can cause the larger torque pulsation of existence in the motor operation course, thereby limit it in the application in each field, therefore, the cogging torque that adopts effective method to reduce flux switch permanent magnet motor just has great importance and practical value.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of Low gullet torque flux switch permanent magnet motor, this motor is provided with the iron core bridge between the adjacent stators iron core and near the air gap side, so that in the motor rotary course, the magnetic that stores in the motor altogether variation of energy tends towards stability, the interaction of permanent magnet and slotted core reduces, thereby cogging torque is effectively weakened.
To achieve these goals, the utility model is taked following scheme:
A kind of Low gullet torque flux switch permanent magnet motor, described motor comprises stator core, iron core bridge and permanent magnet, described iron core bridge is located between the adjacent stators iron core and near the air gap side, described permanent magnet places the groove of adjacent stators iron core and iron core bridge formation.
Described motor comprises radial magnetic field flux switch permanent magnet motor, axial magnetic field flux switch permanent magnet motor and transverse magnetic field flux switch permanent magnet motor.
Described radial magnetic field flux switch permanent magnet motor comprises external rotor radial magnetic field flux switch permanent magnet motor and external rotor radial magnetic field flux switch permanent magnet motor; Described axial magnetic field flux switch permanent magnet motor comprises single stator single rotor axial magnetic field flux switch permanent magnet motor, intermediate stator axial magnetic field flux switch permanent magnet motor, center roller axial magnetic field flux switch permanent magnet motor and many rotor axials of multiple stators magnetic field flux switch permanent magnet motor.
The excitation mode of described radial magnetic field flux switch permanent magnet motor, axial magnetic field flux switch permanent magnet motor and transverse magnetic field flux switch permanent magnet motor includes pure permanent magnet excitation and composite excitation.
Compared with prior art, the beneficial effects of the utility model are:
1. the armature winding of flux switch permanent magnet motor and permanent magnet all place stator, rotor only is conducting magnet core, firm in structure simple, and the fan effect of rotor is conducive to improve the radiating condition of this motor, such armature reaction magnetic flux and permanent magnet flux consist of relation in parallel at magnetic circuit, have guaranteed that permanent magnet excitation has stronger anti-degaussing ability;
2. the iron core bridge is placed between the stator core, although increased the cost of motor permeability magnetic material, has reduced the consumption of permanent magnet, so do not increase the material cost of motor, on the contrary, the material cost of motor also descends to some extent;
3. the iron core bridge links together stator core, thus can with stator intactly punching laminate one-shot forming, and do not need the independent punching of stator core, disperse to laminate postforming, simplified the manufacture craft of this motor, the firmness degree of stator is strengthened;
4. can be by the optimization of Finite Element to iron core bridge thickness, when guaranteeing that cogging torque effectively reduces, the unloaded induced potential of motor and the motor performance such as exert oneself is subject to slight influence;
5. the flux switch permanent magnet motor that provides of the utility model has that power density is large, cooling is convenient, efficient is high and the distinguishing feature such as suitable high-speed cruising can reduce cogging torque, use it for servo system, it is in when operation, and especially the torque pulsation problem during low cruise can effectively be solved; If use it for wind generator system, then can effectively reduce starting wind velocity, widen the wind speed range of power output.
Description of drawings
Fig. 1 is the schematic diagram of placing the iron core bridge among the embodiment between the stator core;
Fig. 2 be among the embodiment iron core bridge thickness on the schematic diagram that affects of cogging torque;
Fig. 3 be among the embodiment iron core bridge thickness on the schematic diagram that affects of air gap flux density;
Fig. 4 be among the embodiment iron core bridge thickness on the schematic diagram that affects of induced potential;
Wherein, 1. stator core, 2. iron core bridge, 3. permanent magnet.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Such as Fig. 1, a kind of Low gullet torque flux switch permanent magnet motor, described motor comprises stator core 1, iron core bridge 2 and permanent magnet 3, and described iron core bridge 2 is located between the adjacent stators iron core 1 and near the air gap side, described permanent magnet 3 places the groove of adjacent stators iron core 1 and iron core bridge 2 formations.
Described motor comprises radial magnetic field flux switch permanent magnet motor, axial magnetic field flux switch permanent magnet motor and transverse magnetic field flux switch permanent magnet motor.
Described radial magnetic field flux switch permanent magnet motor comprises external rotor radial magnetic field flux switch permanent magnet motor and external rotor radial magnetic field flux switch permanent magnet motor; Described axial magnetic field flux switch permanent magnet motor comprises single stator single rotor axial magnetic field flux switch permanent magnet motor, intermediate stator axial magnetic field flux switch permanent magnet motor, center roller axial magnetic field flux switch permanent magnet motor and many rotor axials of multiple stators magnetic field flux switch permanent magnet motor.
The excitation mode of described radial magnetic field flux switch permanent magnet motor, axial magnetic field flux switch permanent magnet motor and transverse magnetic field flux switch permanent magnet motor includes pure permanent magnet excitation and composite excitation.
For the axial magnetic field flux switch permanent magnet motor:
This motor is three-phase 12/10 utmost point, is comprised of external stator and a rotor of two same structures.Each stator is made of 12 " U " shape conducting magnet cores, 12 permanent magnets and 12 coils; Each coil is on the tooth of two adjacent ' U ' shape conducting magnet cores, and the centre embeds permanent magnet, and permanent magnet tangentially alternately magnetizes.On the stator of both sides over against the permanent magnet magnetizing direction opposite.Stator winding adopts concentrates winding.Rotor has 10 teeth, evenly is arranged on the excircle of the non-magnetic annulus of rotor.
According to the explanation in the embodiment, between three-phase 12/10 utmost point flux switch permanent magnet motor adjacent stators iron core 1, add upper core bridge 2, and be the thickness setting of iron core bridge 2 air gap thickness 1mm.
Because above-mentioned three-phase 12/10 utmost point flux switch permanent magnet motor is a magneto alternator, for its performance, that be concerned about the most is amplitude and total percent harmonic distortion THD of induced potential, so when the thickness to this electric machine iron core bridge is optimized, considered cogging torque, induced potential amplitude and THD; Simultaneously because other performances of motor are many and air gap flux density has substantial connection, so in the optimizing process, also the air gap flux density under the different iron core bridge thickness is compared.
The thickness of setting successively the iron core bridge is 0.5mm, 1mm and 1.5mm, adopts Finite Element, calculates respectively cogging torque, air gap flux density and induced potential in these three kinds of situations and the iron-core-free bridge situation, and acquired results is respectively such as Fig. 2, Fig. 3 and shown in Figure 4.
As can be seen from Figure 2, cogging torque reduces with the thickness increase of bridge unshakable in one's determination, but the cycle is constant, is 6 °; And when iron core bridge thickness is 0.5mm, cogging torque is compared and is changed when not adding the iron core bridge not quite, and when iron core bridge thickness was 1mm and 1.5mm, the cogging torque peak-to-peak value descended obviously, drop to 2.1549Nm and 1.9315Nm from 3.9248Nm respectively, the range of decrease is respectively 45.10% and 50.79%; Therefore as can be seen from Figure 3, the variation of air gap flux density is little, suitable iron core bridge thickness can be described, and is little on the air gap flux density impact of motor, and then can judge that iron core bridge thickness is very little to the motor performance impact such as exert oneself; As can be seen from Figure 4, the amplitude of induced potential reduces with the increase of iron core bridge thickness, and the amplitude of reducing is respectively 2.0%, 6.01% and 12.42%.Induced potential under the different iron core bridge thickness is carried out Fourier analysis, and the result is as shown in table 1:
Table 1
As can be seen from Table 1, along with the increase of iron core bridge thickness, the harmonic analysis result of induced potential is basic identical, and namely the iron core bridge is very little on the impact of axial magnetic field flux switch permanent magnet motor induced potential THD, substantially can ignore.
The above analysis result can get, and for this axial magnetic field flux switch permanent magnet motor, iron core bridge thickness is that 1mm is than better suited, and in the case, its cogging torque can effectively be weakened, and other performances of motor keep substantially.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1. Low gullet torque flux switch permanent magnet motor, it is characterized in that: described motor comprises stator core, iron core bridge and permanent magnet, described iron core bridge is located between the adjacent stators iron core and near the air gap side, described permanent magnet places the groove of adjacent stators iron core and iron core bridge formation.
2. Low gullet torque flux switch permanent magnet motor according to claim 1, it is characterized in that: described motor comprises radial magnetic field flux switch permanent magnet motor, axial magnetic field flux switch permanent magnet motor and transverse magnetic field flux switch permanent magnet motor.
3. Low gullet torque flux switch permanent magnet motor according to claim 2, it is characterized in that: described radial magnetic field flux switch permanent magnet motor comprises external rotor radial magnetic field flux switch permanent magnet motor and external rotor radial magnetic field flux switch permanent magnet motor; Described axial magnetic field flux switch permanent magnet motor comprises single stator single rotor axial magnetic field flux switch permanent magnet motor, intermediate stator axial magnetic field flux switch permanent magnet motor, center roller axial magnetic field flux switch permanent magnet motor and many rotor axials of multiple stators magnetic field flux switch permanent magnet motor.
4. according to claim 2 or 3 described Low gullet torque flux switch permanent magnet motors, it is characterized in that: the excitation mode of described radial magnetic field flux switch permanent magnet motor, axial magnetic field flux switch permanent magnet motor and transverse magnetic field flux switch permanent magnet motor includes pure permanent magnet excitation and composite excitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391718 CN202840895U (en) | 2012-08-08 | 2012-08-08 | Low-cogging-torque flux-switching permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391718 CN202840895U (en) | 2012-08-08 | 2012-08-08 | Low-cogging-torque flux-switching permanent magnet motor |
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| CN202840895U true CN202840895U (en) | 2013-03-27 |
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| CN 201220391718 Expired - Lifetime CN202840895U (en) | 2012-08-08 | 2012-08-08 | Low-cogging-torque flux-switching permanent magnet motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825420A (en) * | 2014-02-21 | 2014-05-28 | 东南大学 | Laminated set rotor flux-switching permanent magnet motor |
| KR101776688B1 (en) | 2015-12-18 | 2017-09-19 | 정일산업 주식회사 | Flux Switching Permanent Magnet Motor |
-
2012
- 2012-08-08 CN CN 201220391718 patent/CN202840895U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825420A (en) * | 2014-02-21 | 2014-05-28 | 东南大学 | Laminated set rotor flux-switching permanent magnet motor |
| KR101776688B1 (en) | 2015-12-18 | 2017-09-19 | 정일산업 주식회사 | Flux Switching Permanent Magnet Motor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
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| CX01 | Expiry of patent term |