CN105610291A - Ultra-low temperature permanent-magnet synchronous motor immersed into liquefied natural gas for operation - Google Patents
Ultra-low temperature permanent-magnet synchronous motor immersed into liquefied natural gas for operation Download PDFInfo
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- CN105610291A CN105610291A CN201610082284.2A CN201610082284A CN105610291A CN 105610291 A CN105610291 A CN 105610291A CN 201610082284 A CN201610082284 A CN 201610082284A CN 105610291 A CN105610291 A CN 105610291A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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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
- H02K1/22—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
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
- H02K55/02—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type
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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)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides an ultra-low temperature permanent-magnet synchronous motor immersed into a liquefied natural gas for operation, belongs to the field of motors, and aims at solving the problem that a local superheated gas expands and easily explodes due to iron-core loss of the motor in an ultra-low temperature operating environment. According to the ultra-low temperature permanent-magnet synchronous motor immersed into the liquefied natural gas for operation, the number of stator slots of a stator core is 18 or 30; the external diameter of the stator core 11 is 70+/-10mm, 110+/-10mm, 150+/-10mm or 200+/-20mm; the pole number of permanent-magnet poles is 2 or 4; the permanent-magnet poles are pasted to the outer surface of a rotating shaft; and a rotor sheath sleeves the outer surfaces of the permanent-magnet poles. The motor provided by the invention can be directly immersed into the liquefied natural gas of which the temperature is below -162 DEG C, and is arranged in devices of a transfer pump and the like arranged in the liquefied natural gas; and the ultra-low temperature and high-power density three-phase permanent-magnet synchronous motor is driven to rotate by a variable-voltage variable-frequency method through an external frequency converter.
Description
Technical field
The invention belongs to machine field, relate in particular to a kind of ultralow temperature permasyn morot moving in liquefied natural gas that is immersed in.
Background technology
Because natural gas is a kind of energy of the cleanest, environmental protection, in world wide to the demand of natural gas in continuous increase. My godSo gas all exists with liquefied natural gas (LiquefiedNaturalGas, is called for short LNG) form in storing, transport and using,Temperature need to maintain below its boiling point-161.5 DEG C. In the link of liquefied natural gas transport and use, except passing through pressureOutside the mode of carrying, can also adopt the various pump apparatus that are immersed in liquefied natural gas to be driven conveying, comprise various tanksThe various liquefied natural gas pump such as interior pump, marine pump, automotive pump, high-pressure pump. Some companies of the U.S., Europe, Japan are thisA little liquefied natural gas pump have been developed immersion ultralow temperature mouse cage induction conductivity generally application. In recent years, along with permanent-magnet synchronousThe development of motor manufacture and actuation techniques, starts to have the research of ultralow temperature magneto and exploitation to occur.
But will realize, magneto is invaded and moved in the ultra-low temperature surroundings of liquefied natural gas, have many technical problem needsSolve. Except can be applicable to the material of low temperature environment select problem and with the basic technique problems such as the insulation processing of liquefied gas compatibilityOutside, the electromagnetic structure design of magneto is also a main key technical problem, is determining motor performance and motor ironThe size of heart loss. Under ultra-low temperature surroundings, Eddy Current Loss In Core of An Electromagnetic becomes the main loss of motor, and excessive loss meeting causesLiquefied gas hot-spot, the part gasification that likely can produce liquefied natural gas is expanded and is caused liquefied gas device blast etc. seriouslyDangerous.
Summary of the invention
The present invention proposes a kind of ultralow temperature permasyn morot moving in liquefied natural gas that is immersed in, is in order to solve liquidChange the safe operation problem that natural gas pump drives, and improve that its operational efficiency and power density propose. With respect toSome ultralow temperature mouse cage induction conductivities, this motor can further reduce the wastage, improve power density, thereby more effectivelyAvoid due to large the caused hot-spot gas expansion of ultralow temperature electric machine iron core loss and then the hidden danger such as explosion caused.
Be immersed in the ultralow temperature permasyn morot moving in liquefied natural gas, it comprises: stator and rotor, stator sleeve is connected onRotor outer surface, stator comprises stator core 11 and stator winding 12; Rotor comprises: rotating shaft 21, permanent magnetism magnetic pole 22 and turnSub-sheath 23, the number of poles of permanent magnetism magnetic pole 22 is 2 or 4, permanent magnetism magnetic pole 22 sticks on rotating shaft 21 outer surfaces, rotor jacket23 are socketed in permanent magnetism magnetic pole 22 outer surfaces; The number of stator slots of stator core 11 is 18 or 30, and the external diameter of stator core 11Be 70 ± 10mm, 110 ± 10mm, 150 ± 10mm or 200 ± 20mm; Corresponding to different output power stator core length modelBe trapped among between 50mm-500mm. Under such size range, the application's motor has close far above the power of general motorDegree and torque density. Compare with other motors, the existing compared with high target of the power to volume ratio of general 2 extremely industrial asynchronous machines1-1.5kW/L left and right; And general high performance rare-earth permanent-magnet electric machine is as having the electric vehicle permanent magnet motor of good cooling systemPower to volume ratio compared with high target in about 3-6kW/L. And the application's motor is under the application's size restrictions condition, power bodyAmass than index and can reach in 15--30kW/L left and right. The reason that power of motor density improves, on the one hand with ultralow temperature operation ringUnder border, the reduction of copper loss is relevant, also depends on the other hand following Electromagnetic Design scheme.
While operation, although reducing, motor winding resistance rate makes motor in motor is immersed in the ultra-low temperature surroundings of liquefied natural gasWinding copper loss reduces a lot, but the resistivity of core material also decreases, and the electrical conductivity of core material increases, and whirlpoolStream loss is directly proportional to electrical conductivity, therefore under the effect of motor main field, in core material, can have great eddy current.On the other hand, because magneto need to adopt transducer drive, in the magnetic field of motor internal, must comprise various higher hamonic wavesMagnetic field composition, these higher hamonic wave magnetic fields further increase Eddy Current Loss In Core of An Electromagnetic. Therefore in ultralow temperature permasyn morotThe loss meeting of electric machine iron core increases a lot, close to 10 times of effects of normal temperature numerical value, so eddy-current loss becomes the master of motorWant loss, among each structure members such as existence and electric machine iron core, magnet steel and rotor jacket.
In order to reduce eddy-current loss, main field number of poles is restricted to 2 utmost points or 4 utmost points by motor, makes the fundamental frequency of main field low as far as possible.By adopting the rotor magnetic pole structure in accompanying drawing and passing through the pole form size of calculation optimization, reduce in main field simultaneouslyHarmonic field composition. And then by adopt the electromagnetism lamination structure of 18 grooves or 30 grooves on stator, reduce field waveform distortion,Reduce magneto location torque, avoided the asymmetric magnetic pull that electromagnetic structure is unreasonable caused, effectively reduce iron coreIn eddy-current loss. This electromagnetic structure is also conducive to reduce the higher hamonic wave magnetic field composition in armature reacting field simultaneously, fromAnd eddy-current loss in reduction rotor permanent magnet and in rotor jacket.
The ultralow temperature permasyn morot moving in liquefied natural gas that is immersed in of the present invention, adopts rational electromagnetic structure,And the core loss that simultaneously adopted rational magnetic Circuit Design size reduction, avoid electric machine iron core loss large, cause local mistakeThe generation of hot gas expander phenomenon. Can be applicable to the metal material of low temperature environment and the insulation with liquefied gas compatibility by employingSlot insulation measure and the processing of winding vacuum paint dipping of double-deck above different insulative material in material, stator slot, make developIt is in-162 DEG C of following liquefied natural gas that permagnetic synchronous motor can directly immerse temperature, is installed on the biography in liquefied natural gasAmong the device such as defeated pump, the ultralow temperature high power density three-phase permanent that adopts variable voltage variable frequency method to drive by external frequency converter is sameThe rotation of step motor, power bracket is from 2kW to 500kW. Power of motor density of the present invention is high simultaneously, has far awayHigher than the power of common electric machine and the ratio of volume. In addition, by adopting certain electric magnetic structure and magnetic circuit size and special addingWork technique can be moved motor in the ultra-low temperature surroundings of liquefied natural gas, and has high efficiency, good operation spyProperty and high reliability.
Brief description of the drawings
Fig. 1 is the axial cutaway view that is immersed in the ultralow temperature permasyn morot moving in liquefied natural gas of the present invention;
Fig. 2 is the radial cross-section that is immersed in the ultralow temperature permasyn morot moving in liquefied natural gas of the present invention;
Fig. 3 is the structural representation of 18 groove stator punchings;
Fig. 4 is the structural representation of 30 groove stator punchings;
Fig. 5 is the structural representation of rotor;
Fig. 6 is the structural representation of rotating shaft;
Fig. 7 to Figure 10 is respectively the polarity of magnetic pole and arranges schematic diagram; Wherein, Fig. 7 represents that N-S polarity distributes, and Fig. 8 representsN-S-N-S polarity distributes, and Fig. 9 represents the Halbach magnetic steel array of 2 pole fields, and Figure 10 represents the Halbach of 4 pole fieldsMagnetic steel array.
Detailed description of the invention
Detailed description of the invention one: illustrate present embodiment with reference to Fig. 1, Fig. 2 and Fig. 5, soaking described in present embodimentThe ultralow temperature permasyn morot moving in liquefied natural gas, it comprises: stator and rotor, stator sleeve is connected on outside rotor, there is air gap on surface between stator and rotor, and stator comprises stator core 11 and stator winding 12;
The number of stator slots of stator core 11 is 18 or 30, and the external diameter of stator core 11 be 70 ± 10mm, 110 ± 10mm,150 ± 10mm or 200 ± 20mm; Stator winding 12 is embedded in stator slot;
Rotor comprises: rotating shaft 21, permanent magnetism magnetic pole 22 and rotor jacket 23, the number of poles of permanent magnetism magnetic pole 22 is 2 or 4, permanent magnetismMagnetic pole 22 sticks on rotating shaft 21 outer surfaces, and rotor jacket 23 is socketed in permanent magnetism magnetic pole 22 outer surfaces.
Stator core 11 outside dimension spans are 70 ± 10mm, 110 ± 10mm, 150 ± 10mm or 200 ± 20mm,Stator core 11 length are corresponding to different rated power value between 50mm-500mm. Stator winding 12 is three-phase copperWinding, three-phase stator winding is by the coiling of copper enamel-covered wire, and in the time that number of stator slots is 18, stator winding 12 pitches are 4 grooves, whenNumber of stator slots is 30 o'clock, and stator winding 12 pitches are 7 grooves. Winding is through vacuum paint dipping insulation processing. Winding overhang shaping orAdopt the material colligations such as cotton yarn.
The present invention be directed to researched and developed power bracket between 2kW to 500kW, there is ad hoc structure and specific dimensions, the three-phase permanent-magnetic synchronous motors that can be immersed in the ultralow temperature moving in liquefied natural gas proposes, by adopting 2 or 4The electromagnetic structure of the utmost point 18 grooves, 2 or 4 utmost point 30 grooves, is conducive to reduce magneto location torque, has avoided electromagnetic structure notThe asymmetric magnetic pull rationally causing, effectively reduces the eddy-current loss in iron core. In the time that permanent magnetism magnetic pole adopts 2 electrode structure,Stator core adopts skewed slot method to reduce magnetic field harmonic components and impact thereof.
Detailed description of the invention two: illustrate present embodiment with reference to Fig. 5 and Fig. 6, present embodiment is to specific embodiment partyThe ultralow temperature permasyn morot that being immersed in described in formula one moved in liquefied natural gas is described further, in present embodiment,Rotating shaft 21 comprises first section, boss, stage casing and latter end, and first section and latter end are all frustum shape, and stage casing and boss are all cylindricalShape, boss diameter is greater than stage casing diameter, and stage casing diameter is greater than the bottom surface diameter of frustum, and outer surface edge in stage casing circumferentially has groove,This groove is as the installation room 31 of permanent magnetism magnetic pole 22, and first section is fixed on an end face of boss, and stage casing head end is fixed on bossOther end, latter end is fixed on the end in stage casing, and first section, boss, stage casing and latter end are integral structure, and rotating shaft 21 isQuill shaft.
The head end in rotating shaft 21 stage casings protrudes from the part of installation room as head end step 33, and the end in rotating shaft 21 stage casings protrudes fromThe part of latter end is as end step 32. When practical application, on step 32, carry out the dynamic balancing of rotor loss of weight, head endwaysEnd step 33 can play the positioning action of rotor sleeve.
Rotating shaft 21 connects by internal spline or other modes with load in the time of practical application.
Rotating shaft 21 is made up of whole alloy steel material, at rotating shaft 21 surface design magnet steel installation rooms 31, its length value and magneticSteel is equal in length, is close with stator core length, and difference range is ± 10mm; Rotor diameter is less than frame bore B,Difference range is 1mm-8mm.
Adopt the benefit of this rotor structure and rotating shaft shape to be, suffered gluing can reduce to move in liquefied natural gas timeStagnant frictional force makes rotor structure globality and reliability improve simultaneously. The effect on the other hand of both sides boss is to carry out rotor to moveBalance.
Detailed description of the invention three: present embodiment is super that being immersed in described in detailed description of the invention two moved in liquefied natural gasLow temperature permasyn morot is described further, and in present embodiment, the external diameter of rotating shaft 21 boss external diameters and rotating shaft 21 is equalFor D1, the external diameter of end step 32 is D2, and the external diameter of head end step 33 is D3, and the external diameter of installation room 31 is D4, turnsThe thickness of sub-sheath is H1, and permanent magnetism magnetic pole thickness is H2: D4+2*H2=D2, D2=D3, D3+2*H1=D1.
Detailed description of the invention four: present embodiment is super that being immersed in described in detailed description of the invention one moved in liquefied natural gasLow temperature permasyn morot is described further, and in present embodiment, stator core 11 is built up by multiple silicon steel sheets, silicon steelThe thickness of sheet is between 0.1mm-0.5mm.
In present embodiment, in the time adopting silicon steel sheet, stator core must form an entirety, can adopt stator punching to fold rivetingTechnique or rationally welding procedure or technique for sticking or two ends increase low-temperature alloy cramp method and form integral core.
Detailed description of the invention five: illustrate present embodiment with reference to Fig. 3 and Fig. 4, present embodiment is to specific embodiment partyThe ultralow temperature permasyn morot that being immersed in described in formula four moved in liquefied natural gas is described further, in present embodiment,It also comprises: 13, two stator punchings 13 of two stator punchings are separately fixed at the two ends of stator core 11, and stator punchingThe thickness of sheet 13 is 2mm-4mm, on stator punching 13 outer surfaces, has water jacket 14, on stator punching 13 inwalls, hasWith identical inside groove on stator core 11 inwalls.
In the time of practical application, a kind of mode that forms stator core 11 is to adopt stator punching 13 to press at stator core 11 two endsTightly, on stator punching 13 external diameters, have water jacket 14, this groove 14 is rectangular channel or dovetail groove, then passes through stator punchingWater jacket 14 on 13 external diameters is withheld fixing shaping; The another kind of mode that forms stator core 11 is to increase on stator punching 13Adding punching press riveting point folds riveting and forms iron core. Stator punching 13 is low-temperature alloy punching.
Detailed description of the invention six: present embodiment is super that being immersed in described in detailed description of the invention one moved in liquefied natural gasLow temperature permasyn morot is described further, and in present embodiment, stator core 11 is by having high magnetic saturation and low whirlpoolRepressed the formed integral core of compound soft magnetic material of stream loss.
In present embodiment, by adopting the compound soft magnetic material through the high magnetic saturation of having of insulation processing and low eddy-current lossParticle forms integral core, can effectively limit the eddy-current loss level in iron core.
Detailed description of the invention seven: present embodiment is super that being immersed in described in detailed description of the invention one moved in liquefied natural gasLow temperature permasyn morot is described further, and in present embodiment, the material of permanent magnetism magnetic pole 22 is SmCo magnet steel.
While adopting SmCo magnet steel, motor performance temperature influence is little, and motor temperature stability is high.
Detailed description of the invention eight: present embodiment is super that being immersed in described in detailed description of the invention one moved in liquefied natural gasLow temperature permasyn morot is described further, and in present embodiment, the material of permanent magnetism magnetic pole 22 is Nd-Fe-B magnet steel.
Adopt when Nd-Fe-B magnet steel, shortcoming is that the motor performance impact that is acted upon by temperature changes is larger, and loss of excitation possibility increases,And the magnetic energy product of Nd-Fe-B magnet steel declines more under condition of ultralow temperature. But still can load by reasonable actual electrical,Low temperature permasyn morot described in detailed description of the invention one adopts Nd-Fe-B magnet steel to form main pole.
Detailed description of the invention nine: present embodiment is super that being immersed in described in detailed description of the invention one moved in liquefied natural gasLow temperature permasyn morot is described further, in present embodiment, and the material praseodymium iron boron magnet steel of permanent magnetism magnetic pole 22.
Praseodymium iron boron magnet steel is a kind of novel magnetic steel material, and price is very high, but has higher magnetic energy product and higher temperatureStability.
Detailed description of the invention ten: present embodiment is super that being immersed in described in detailed description of the invention one moved in liquefied natural gasLow temperature permasyn morot is described further, and in present embodiment, stator slot is parallel teeth or approximate parallel teeth, bottom landBe shaped as flat or circular arc bottom, groove shoulder is shaped as trapezoidal or circular arc, and width of rebate span is 2mm-8mm, and in grooveWall is provided with insulating materials.
Insulating materials is separated with conductor for unshakable in one's determination. All insulating materials are all chemically compatible with liquefied gas. In stator slot, arrangeThe slot insulation measure of double-deck above different insulative material.
Detailed description of the invention 11: present embodiment is that being immersed in liquefied natural gas described in detailed description of the invention one movedUltralow temperature permasyn morot is described further, and in present embodiment, the material of rotor jacket 23 is not magnetic conduction gold of low temperatureBelong to material.
Low temperature described in present embodiment not magnetic conductive metal material as low temperature stainless steel, by adopting low temperature not magnetic conductive metal materialAll-in-one-piece thin walled cylindrical sheath processed, the main pole that can protect magnet steel to form, counteracting is produced in the time of rotorCentrifugal force; Reduce the eddy-current loss that high order armature reacting field harmonic wave produces in magnet steel simultaneously; Also can pass through any surface finishDegree is processed viscous friction power suffered can reduce rotor and move in liquefied natural gas time.
The ultralow temperature permasyn morot moving in liquefied natural gas that is immersed in of the present invention in the time of practical application, comprise withThe arrangement mode of lower several permanent magnetism magnetic poles:
1, be N-S polarity by 2 utmost point situations shown in Fig. 7 and distribute, magnetic field orientating is for radially or be parallel to magnet steel radial symmetric lineDirection, subtended angle ANG is 140 °-180 °, is exactly that illustrated magnet steel is whole apart from situation 180 ° time;
2, be N-S-N-S polarity by 4 utmost point situations shown in Fig. 8 and distribute, magnetic field orientating is for radially or to be parallel to magnet steel radially rightClaim line direction, subtended angle ANG is 70 °-90 °, is exactly that illustrated magnet steel is whole apart from situation 90 ° time;
3, press 2 utmost point Halbach magnetic steel array situations shown in Fig. 9, except subtended angle is that ANG1, magnetic field are radially orientatedOutside N-S main pole, also have 2 tangential magnetic field magnetic poles that subtended angle is ANG2, its magnetic field is tangentially orientated and points to main poleThe N utmost point. Wherein, ANG1+ANG2=180 °, occupies axle surface half, and ANG1 is greater than ANG2.
4, press 4 utmost point Halbach magnetic steel array situations shown in Figure 10, except subtended angle is that ANG1, magnetic field are radially orientatedOutside N-S main pole, also have 4 tangential magnetic field magnetic poles that subtended angle is ANG2, its magnetic field is tangentially orientated and points to main poleThe N utmost point. Wherein, ANG1+ANG2=90 °, occupies 1/4th axle surfaces, and ANG1 is greater than ANG2.
Adopt the following example that the size of the present invention in the time of practical application is described:
Embodiment mono-: the power model that is immersed in the ultralow temperature permasyn morot moving in liquefied natural gas described in the present embodimentEnclose for 2kW-20kW, stator punching inside groove number is 18, and rotor is 4 electrode structures, and stator punching external diameter is 70 ± 10mm, fixedSub-punching internal diameter span is 35mm-50mm, and the facewidth span of stator punching inside groove is 2mm-4mm, and yoke is high to be gotValue scope is 4mm-6mm, and width of rebate span is 2mm-4mm, and winding pitch is 4 grooves.
Embodiment bis-: the difference of the present embodiment and embodiment mono-is, rotor is 2 electrode structures, winding pitch is 8 or 9 grooves,Other structure is identical with embodiment mono-.
Embodiment tri-: the power model that is immersed in the ultralow temperature permasyn morot moving in liquefied natural gas described in the present embodimentEnclose for 10kW-65kW, stator punching inside groove number is 18, and rotor is 4 electrode structures, and stator punching external diameter is 110 ± 10mm,Stator punching internal diameter is 70 ± 10mm, and the facewidth of stator punching inside groove is 5 ± 2mm, and yoke is high is 8 ± 2mm, and width of rebate is4 ± 2mm, winding pitch is 4 grooves.
Embodiment tetra-: the difference of the present embodiment and embodiment tri-is, stator core adopts 30 groove electromagnetic structures, and the facewidth is5 ± 2mm, winding pitch is 7 grooves, other is identical with embodiment tri-.
Embodiment five: the difference of the present embodiment and embodiment tri-is, rotor is 2 electrode structures, stator punching internal diameter is60 ± 10mm, yoke is high is 14 ± 4mm, and winding pitch is 8 grooves or 9 grooves, and other is identical with embodiment tri-.
Embodiment six: the difference of the present embodiment and embodiment five is, stator core adopts 30 groove electromagnetic structures, and the facewidth is4 ± 2mm, winding pitch is 14 grooves or 15 grooves, other is identical with embodiment five.
Embodiment seven: the power model that is immersed in the ultralow temperature permasyn morot moving in liquefied natural gas described in the present embodimentEnclose for 40kW-150kW, stator punching inside groove number is 18, and rotor is 4 electrode structures, and stator punching external diameter is 150 ± 10mm,Stator punching internal diameter is 90 ± 10mm, and the facewidth is 8 ± 2mm, and yoke is high is 12 ± 4mm, and width of rebate is 4 ± 2mm, windingPitch is 4 grooves.
Embodiment eight: the difference of the present embodiment and embodiment seven is, stator core adopts 30 groove electromagnetic structures, and the facewidth is4 ± 2mm, winding pitch is 7 grooves, other is identical with embodiment seven.
Embodiment nine: the difference of the present embodiment and embodiment seven is, rotor is 2 electrode structures, stator punching internal diameter is80 ± 10mm, yoke is high is 16 ± 4mm, and winding pitch is 8 or 9 grooves, and other is identical with embodiment seven.
Embodiment ten: the difference of the present embodiment and embodiment nine is, stator core adopts 30 groove electromagnetic structures, and the facewidth is4 ± 2mm, winding pitch is 14 or 15 grooves, other is identical with embodiment nine.
Embodiment 11: the power that is immersed in the ultralow temperature permasyn morot moving in liquefied natural gas described in the present embodimentScope is 100kW-500kW, and stator punching inside groove number is 18, and rotor is 4 electrode structures, and stator punching external diameter is 200 ± 10mm,Internal diameter is 130 ± 15mm, and the facewidth is 11 ± 3mm, and yoke is high is 17 ± 4mm, and width of rebate is 5 ± 2mm, and winding pitch is 4Groove.
Embodiment 12: the difference of the present embodiment and embodiment 11 is, stator core adopts 30 groove electromagnetic structures, the facewidthBe 6 ± 2mm, width of rebate is 4 ± 2mm, and winding pitch is 7 grooves, and other structure is identical with embodiment 11.
Embodiment 13: the difference of the present embodiment and embodiment 11 is, rotor is 2 electrode structures, stator punching internal diameter is110 ± 15mm, yoke is high is 28 ± 6mm, and winding pitch is 8 or 9 grooves, and other structure is identical with embodiment 11.
Embodiment 14: the difference of the present embodiment and embodiment 13 is, stator core adopts 30 groove electromagnetic structures, the facewidthBe 6 ± 2mm, winding pitch is 14 or 15 grooves, and other is identical with embodiment 13.
Claims (10)
1. be immersed in the ultralow temperature permasyn morot moving in liquefied natural gas, it comprises: stator and rotor, stator socketAt rotor outer surface, between stator and rotor, there is air gap, stator comprises stator core (11) and stator winding (12);
It is characterized in that, the number of stator slots of stator core (11) is 18 or 30, and the external diameter of stator core (11) be 70 ± 10mm,110 ± 10mm, 150 ± 10mm or 200 ± 20mm;
Rotor comprises: rotating shaft (21), permanent magnetism magnetic pole (22) and rotor jacket (23), the number of poles of permanent magnetism magnetic pole (22) is2 or 4, permanent magnetism magnetic pole (22) sticks on rotating shaft (21) outer surface, and rotor jacket (23) is socketed in permanent magnetism magnetic pole (22)Outer surface.
2. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsComprise first section, boss, stage casing and latter end in, rotating shaft (21),
First section is all frustum shape with latter end, and stage casing and boss be cylindrical shape all, and boss diameter is greater than stage casing diameter, stage casingDiameter is greater than the bottom surface diameter of frustum, and stage casing outer surface is along circumferentially having groove, and this groove is as the peace of permanent magnetism magnetic pole (22)Dress chamber (31), first section is fixed on an end face of boss, and stage casing head end is fixed on boss other end, and latter end is fixed on stage casingEnd, first section, boss, stage casing and latter end are integral structure, and rotating shaft (21) is quill shaft.
3. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsIn, stator core (11) is built up by multiple silicon steel sheets, and the thickness of silicon steel sheet is between 0.1mm-0.5mm.
4. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsIn, it also comprises: two stator punchings (13),
Two stator punchings (13) are separately fixed at the two ends of stator core (11), and the thickness of stator punching (13) is2mm-4mm has water jacket (14) on stator punching (13) outer surface, has with fixed on stator punching (13) inwallIdentical inside groove on son (11) inwall unshakable in one's determination.
5. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsRepressed formed whole by the compound soft magnetic material with high magnetic saturation and low eddy-current loss in, stator core (11)Body iron core.
6. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsIn, the material of permanent magnetism magnetic pole (22) is SmCo magnet steel.
7. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsIn, the material of permanent magnetism magnetic pole (22) is Nd-Fe-B magnet steel.
8. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsIn, the material praseodymium iron boron magnet steel of permanent magnetism magnetic pole (22).
9. the ultralow temperature permasyn morot moving in liquefied natural gas that is immersed according to claim 1, its feature existsIn, stator slot is parallel teeth or approximate parallel teeth, and bottom land is shaped as flat or circular arc bottom, and groove shoulder is shaped as trapezoidal or circular arc,Width of rebate span is 2mm-8mm, and groove inwall is provided with insulating materials.
10. the ultralow temperature permasyn morot moving in liquefied natural gas, its feature of being immersed according to claim 1Be, the material of rotor jacket (23) is not magnetic conductive metal material of low temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610082284.2A CN105610291A (en) | 2016-02-05 | 2016-02-05 | Ultra-low temperature permanent-magnet synchronous motor immersed into liquefied natural gas for operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610082284.2A CN105610291A (en) | 2016-02-05 | 2016-02-05 | Ultra-low temperature permanent-magnet synchronous motor immersed into liquefied natural gas for operation |
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| CN105610291A true CN105610291A (en) | 2016-05-25 |
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| CN201610082284.2A Pending CN105610291A (en) | 2016-02-05 | 2016-02-05 | Ultra-low temperature permanent-magnet synchronous motor immersed into liquefied natural gas for operation |
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| CN106411015A (en) * | 2016-12-07 | 2017-02-15 | 大连威克特工贸有限公司 | Motor insulation structure under cryogenic working condition |
| CN107681822A (en) * | 2017-09-25 | 2018-02-09 | 湖南大学 | Efficient cryogenic motor for latent liquid type LNG pump |
| CN109347222A (en) * | 2018-12-26 | 2019-02-15 | 哈尔滨理工大学 | A kind of LNG pump low-temperature and high-speed Design of PM Motor method and electric machine structure |
| CN111106685A (en) * | 2019-11-29 | 2020-05-05 | 北京自动化控制设备研究所 | Permanent magnet motor based on magnetic pole special-shaped array |
| CN116780800A (en) * | 2023-06-16 | 2023-09-19 | 哈尔滨理工大学 | Low-temperature high-speed motor structure with low-loss characteristic |
| CN118413016A (en) * | 2024-07-02 | 2024-07-30 | 瑞声光电科技(常州)有限公司 | Stepping motor |
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| CN111106685A (en) * | 2019-11-29 | 2020-05-05 | 北京自动化控制设备研究所 | Permanent magnet motor based on magnetic pole special-shaped array |
| CN116780800A (en) * | 2023-06-16 | 2023-09-19 | 哈尔滨理工大学 | Low-temperature high-speed motor structure with low-loss characteristic |
| CN116780800B (en) * | 2023-06-16 | 2024-04-16 | 哈尔滨理工大学 | Low-temperature high-speed motor structure with low-loss characteristic |
| CN118413016A (en) * | 2024-07-02 | 2024-07-30 | 瑞声光电科技(常州)有限公司 | Stepping motor |
| CN118413016B (en) * | 2024-07-02 | 2024-09-10 | 瑞声光电科技(常州)有限公司 | Stepping motor |
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