CN204669112U - A kind of multipole permanent magnet motor pole core structure - Google Patents
A kind of multipole permanent magnet motor pole core structure Download PDFInfo
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- CN204669112U CN204669112U CN201520193174.4U CN201520193174U CN204669112U CN 204669112 U CN204669112 U CN 204669112U CN 201520193174 U CN201520193174 U CN 201520193174U CN 204669112 U CN204669112 U CN 204669112U
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- magnet steel
- pole core
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- generator
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- 230000005405 multipole Effects 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
A kind of multipole permanent magnet motor pole core structure, primarily of pole core and magnet steel composition.Pole core is evenly distributed with the magnet steel groove number identical with motor number of pole-pairs, the magnet steel of identical polar is laid in magnet steel groove, N pole or S pole, pole core is made up of good permeability magnetic material, the magnetic pole with magnet steel opposite polarity is formed in the middle of every two magnet steel, i.e. S pole or N pole, finally forms the magnetic pole that N, S evenly replace on rotor surface.The utility model is compared with existing product, and on pole core, can open the magnet steel groove of half less, this is very favourable to the processing of multipolar dynamo or super multipolar dynamo.Can be easier to realize multi-polar structure with the magneto made by the utility model, new forms of energy industry can be widely used in, change the system configuration of existing new forms of energy industry, promote the development of new forms of energy industry.
Description
Art
The utility model relates to a kind of rotor structure for permanent magnet motor, and particularly a kind of multipole permanent magnet motor pole core structure, belongs to magneto technical field.
Background technology
There are two kinds of mains frequency standards in the world, i.e. 50Hz frequency and 60Hz frequency standard, no matter generator or power consumption equipment all will meet above two kinds of frequency requirement.According to motor speed formula n=60f/p, the rotating speed n of generator is decided by mains frequency f and motor number of pole-pairs p, because mains frequency is steady state value, motor number of pole-pairs is subject to the restriction of motor volume, motor pole number can not arrange too much, therefore, conventional motors runs up with the speed of 750 turns ~ 3000 turns per minute usually.
Exhaustion along with fossil energy and the pressure under the pressure of environmental pollution, people more and more rely on the development in new forms of energy industry for counsel, such as wind energy, solar energy, oceanic energy, river energy, geothermal energy etc., new forms of energy industry energy relative distribution, encircled energy is inadequate, its rotating speed produced is often very low, the electric energy that generation of electricity by new energy sends often needs to change through commutation inversion, and rectification link requires that the electric energy that generator sends will reach a certain frequency, this just requires that power generator electrode number is abundant, can send the electric energy of certain frequency when could realize low speed.Traditional electric excitation generator number of poles is little, cannot adapt to the needs of this occasion.
At present, in wind-force and river water generating equipment, meet power consumption equipment to generating frequency requirement to meet, or in order to obtain the electric energy of 50Hz frequency or 60Hz frequency, main employing four kinds of patterns at present:
One is at wind turbine or adds a booster engine between the hydraulic turbine and generator, form " wind turbine (hydraulic turbine)+booster engine+generator " system, the slow-speed of revolution that wind turbine or the hydraulic turbine produce is converted to the high rotating speed that generator needs by booster engine, as 750 turns per minute, 1000 turns or 1500 turns.The drawback of this pattern is, after system adds booster engine, efficiency is reduced, adds system configuration, and configuration is complicated, failure rate is high, operating cost is high.
Two is after generator, be connected in series rectifier and inverter, form " wind turbine (hydraulic turbine)+generator+rectifier+inverter " system, the low frequency ac sent by generator becomes direct current, and then DC inverter is become the alternating current of 50Hz frequency or 60Hz frequency by inverter again.System speed is lower in this mode, but the alternating current that rectifier needs generator to send is more than certain frequency (as 12Hz), and this just requires that the number of poles of generator is more, and guarantee rectification effect is good.Rectifier, inverter are made up of expensive high power module in addition, and price is high, poor reliability, adds project cost, and maintenance capacity is large, and operating cost is high.
Three is both be equipped with booster engine in electricity generation system, installs again rectifier, inverter additional simultaneously, forms " wind turbine (hydraulic turbine)+booster engine+generator+rectifier+inverter " system.This system mainly ensures that generator has higher rotating speed, enables the electric energy sent meet the needs of rectifier preferably.This system is the most complicated, and cost is the highest, and maintenance capacity is maximum, but the pattern the most generally adopted at present.
Four is the direct drawing generators of wind turbine or the hydraulic turbine, and the electric energy sent after generating is directly surfed the Net or supplied power consumption equipment, forms " wind turbine (hydraulic turbine)+generator " system, and system runs generating online at the low rotational speed.This is the most succinct, the optimal configuration of one, this system requirements stabilization of speed, the voltage that generator sends and frequency must meet electrical network standard, require that supporting generator will have abundant number of poles, must send the electric energy of 50HZ or 60Hz frequency at the low rotational speed.
Comparatively speaking, permanent magnet generator is easier to realize low speed than traditional electric excitation generator ratio, along with applying of permanent magnet generator, in wind power industry configuration mode gradually by the first with the third pattern to the second schema evolution.In the second pattern, system rotating speed is lower, but the electric frequency sent can not be too low, and General Requirements is at more than 12Hz, otherwise after rectification, waveform is unstable, rectification efficiency is low, and this requires that the generator number of poles of joining is sufficiently many.4th kind of pattern has just started to explore tries out, the electric energy that generator sends in this mode must be 50HZ or 60Hz, in wind power system or river electric generator system, the rotating speed of wind energy conversion system or the hydraulic turbine is very low, if system directly sends the electric energy of 50HZ or 60Hz frequency, require that generator must have a lot of numbers of poles.As when generator speed is at 20 turns per minute, send the electric energy of 50HZ, generator number of poles is necessary for 300 poles, and permanent magnetism magnetic poles many is like this distributed on the little rotor of diameter very difficult, and existing rotor structure for permanent magnet motor is almost difficult to realize.
Summary of the invention
Technology of the present utility model is dealt with problems and is: overcome the deficiencies in the prior art, a kind of multipole permanent magnet motor pole core structure is provided, the permanent-magnet steel of this motor can reduce half, the object realizing motor multipole can be easier to, generator can be made to send the electric energy of upper frequency, to meet follow-up direct grid-connected or the grid-connected needs of commutation inversion.
Technical solution of the present utility model is: a kind of multipole permanent magnet motor pole core structure, its feature is: many pole cores structure is made up of pole core and magnet steel two parts, in this structure, magnet steel is arranged in the magnet steel groove of pole core, and the magnet steel of identical polar is only installed, as N pole magnet steel or S pole magnet steel, therefore when number of poles is identical, the magnet steel groove of this rotor core reduces half, the distance with magnet steel arc length equidimension is left between two magnet steel, closing by the magnetic line of force, the magnetic pole of another kind of polarity is formed in the place of not opening magnet steel groove, i.e. S pole or N pole, like this by laying the magnet steel of single polarity, N is formed on rotor surface, the magnetic field of S alternating polarity.
Principle of the present utility model is: in magnet steel groove, only lay N pole magnet steel or S pole magnet steel, for N pole magnet steel, magnet steel N pole-face is to air gap, the magnetic line of force sends from magnet steel N pole, through motor gas-gap, stator core, turn back again through motor gas-gap, enter rotor core, finally get back to the S pole of magnet steel, form magnetic loop, S pole field is formed there is no the rotor core surface portion of mounting magnetic steel, this polarity being equivalent to magnet steel motor gas-gap dorsad extends to the rotor surface of non-device magnet steel part, make to form N pole on motor gas-gap surface, S pole is equally distributed magnetic field alternately.If what install is S pole magnet steel, will the part of mounting magnetic steel do not had to form N pole field.When generator drive rotor rotation under external force, the alternating magnetic field of N pole, S pole will be formed in stator core, and produce alternation induced potential in the stator coils, form generating voltage, convert the mechanical energy of wind turbine or the hydraulic turbine to electric energy, reach generating object.
The utility model advantage is compared with prior art: the magnet steel number that generator can be made to lay reduces half, reduce the difficulty of processing of electric machine iron core, decrease magnet steel number of packages, reduce installation difficulty, simplify production technology, improve the utilance of magnet steel, improve production efficiency, improve rotor strength, be conducive to reducing motor volume.Appearing on the market of this generator can simplify new energy resources system configuration mode, promotes the development of new forms of energy industry.
Accompanying drawing explanation
Fig. 1 is a kind of multipole permanent magnet motor pole core structural representation described in the utility model.
Fig. 2 is a kind of multipole permanent magnet motor pole core structure magnetic line of force distribution map described in the utility model.
As shown in Figure 1, a kind of multipole permanent magnet motor pole core described in the utility model, forms primarily of pole core 1, magnet steel 2.
As shown in Figure 2, state and how to form N pole, S pole field on motor surface, the magnetic line of force sends from magnet steel N pole, through motor gas-gap, enter stator core, again turn back motor gas-gap, enter rotor core, arrive the S pole of magnet steel again, form magnetic loop, do not having the part of mounting magnetic steel to form S pole field, make to form N pole, S pole alternately equally distributed magnetic field on motor gas-gap surface.
Embodiment
A kind of multipole permanent magnet motor pole core structure described in the utility model, as shown in Figure 1, pole core 1 evenly has magnet steel groove, the groove number of magnet steel groove is identical with the number of pole-pairs of motor, the arc length width of magnet steel groove is substantially identical with institute's arc length of staying between two magnet steel grooves, and magnet steel groove arc length has following formulae discovery:
T＝πD/P
Wherein: the distance of arc length between the arc length width of T-magnet steel groove and two magnet steel grooves, unit: mm
D-rotor external diameter, unit: mm
P-motor pole number
In actual production, according to the distance of magnet steel apart from rotor surface, the arc length width of magnet steel groove can suitably be revised.
Magnet steel 2 is arranged in the magnet steel groove of pole core 1, only installs the magnet steel of single polarity when mounted, namely only installs the magnet steel of N pole relative to motor gas-gap or only installs the magnet steel of S pole.
The utility model had both been applicable to generator iron-core structure, was also applicable to motor iron-core structure, had both been applicable to internal rotor core structure and had also been applicable to outer rotor iron core structure.
Claims (2)
1. a multipole permanent magnet motor pole core structure, it is characterized in that: many pole cores structure is made up of pole core (1) and magnet steel (2) two parts, magnet steel (2) is arranged in the magnet steel groove of pole core (1), and only installs the magnet steel (2) of identical polar.
2. a kind of multipole permanent magnet motor pole core structure according to claim 1, it is characterized in that: on pole core (1), evenly have magnet steel groove, the groove number of magnet steel groove is identical with the number of pole-pairs of motor, the arc length width of magnet steel groove is substantially identical with institute's arc length width that stays between two magnet steel grooves, calculate by formula T=π D/P and determine, in formula, T represents the distance of arc length between the arc length width of magnet steel groove and two magnet steel grooves, unit: mm; D represents rotor external diameter, unit: mm; P represents motor pole number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193174.4U CN204669112U (en) | 2015-03-27 | 2015-03-27 | A kind of multipole permanent magnet motor pole core structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193174.4U CN204669112U (en) | 2015-03-27 | 2015-03-27 | A kind of multipole permanent magnet motor pole core structure |
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| Publication Number | Publication Date |
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| CN204669112U true CN204669112U (en) | 2015-09-23 |
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| CN201520193174.4U Expired - Fee Related CN204669112U (en) | 2015-03-27 | 2015-03-27 | A kind of multipole permanent magnet motor pole core structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337433A (en) * | 2014-08-11 | 2016-02-17 | 马力 | Multi-polar permanent-magnet motor pole core structure |
| TWI770765B (en) * | 2021-01-13 | 2022-07-11 | 天容寶節能科技股份有限公司 | Permanent magnet generator faciliting electricity generation from ocean energy |
| US11870306B2 (en) | 2021-01-13 | 2024-01-09 | Flh Energy Technology Ltd. | Wave energy conversion device and dual-axial wave energy conversion device |
| US12107469B2 (en) | 2021-01-13 | 2024-10-01 | Flh Energy Technology Ltd. | Multi-axial wave energy conversion device |
-
2015
- 2015-03-27 CN CN201520193174.4U patent/CN204669112U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337433A (en) * | 2014-08-11 | 2016-02-17 | 马力 | Multi-polar permanent-magnet motor pole core structure |
| TWI770765B (en) * | 2021-01-13 | 2022-07-11 | 天容寶節能科技股份有限公司 | Permanent magnet generator faciliting electricity generation from ocean energy |
| US11870306B2 (en) | 2021-01-13 | 2024-01-09 | Flh Energy Technology Ltd. | Wave energy conversion device and dual-axial wave energy conversion device |
| US12107469B2 (en) | 2021-01-13 | 2024-10-01 | Flh Energy Technology Ltd. | Multi-axial wave energy conversion device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151217 Address after: 271000 Taishan Youth Development Zone, Tai'an District, Shandong, China, Patentee after: TAIAN YANGGUANG POWER MOTOR CO.,LTD. Address before: 271022 Tai'an Shandong sunshine Power Motor Co., Ltd. Tai'an Youth Development Zone Patentee before: Ma Li |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |