CN1205567A - Magnetic sleeve electromachine - Google Patents
Magnetic sleeve electromachine Download PDFInfo
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- CN1205567A CN1205567A CN 97108145 CN97108145A CN1205567A CN 1205567 A CN1205567 A CN 1205567A CN 97108145 CN97108145 CN 97108145 CN 97108145 A CN97108145 A CN 97108145A CN 1205567 A CN1205567 A CN 1205567A
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Abstract
An electric machine with magnetis sleeve cylinder is the one with enclosed slots, and features that its iron core has open slots to which windings are embedded, and is sleeved by a magnetic sleeve cylinder, and the slots are finally enclosed. Said magnetic sleeve cylinder is made up of a group of circular rings made of ferromagnetic or subferromagnetic material. Said rings are insulated with each other and has 0.2-10 mm in thickness and 0.5-50 mm in width.
Description
The invention belongs to the invention of generator and electric motor structure and manufacture view, can be applicable to the AC and DC motor.
In the design of ac motor structure, exist a pair of contradiction:, need notch good greatly a bit from the angle of wire insertion technology; From the angle of motor properties, need notch littler good.Purpose of the present invention can satisfy wire insertion technology exactly, can satisfy motor properties again.
The present invention adopts the motor of magnetic sleeve-type structure, and making motor is open slot when rule, adds that then magnetic sleeve becomes motor to remain silent the groove motor.Can realize following purpose: 1, can make high capacity motor and generator become the groove of remaining silent, thereby improve motor performance by open slot; 2, the motor of semi-open slot and semi-enclosed slot all can be made the open slot rule, the groove of remaining silent assembling, make wire insertion technology, quality, copper factor, the turn-to-turn insulation of motor all improve and not reduce its performance.3, make that neutral region becomes wide and smooth between the N-S utmost point of direct current machine commutation sexual needs, the reactance electromotive force is also smooth.
Feature of the present invention is that electric machine iron core is made open slot, and embedded line refills magnetic sleeve later on, open slot is sealed become to remain silent groove.Fig. 2 is an open slot stator section, and Fig. 1 is a magnetic sleeve, and its most basic structure is made up of one group of magnetic annulus, insulation between ring and the ring.Magnetic sleeve can also have several structures of narrating later.After the embedded line circle, these ferromagnetic annulus are inserted in iron core, motor is the magnetic sleeve-type of Fig. 4 shape groove motor of remaining silent with regard to having become stator for Fig. 3 shape, rotor, and when rotor was salient pole type, magnetic sleeve was just not necessarily circular.The magnetic sleeve of Fig. 1 is enclosed within the inner surface of the stator core 2 of Fig. 2, makes the stator core inner surface become the smooth surface of Fig. 3 shape.Magnetic sleeve is made by ferromagnetism or ferrimagnetic material.Angle from motor performance, magnetic sleeve should be that the little and between cog leakage field of eddy current is little and capablely provide enough magnetic fluxs to the notch place, to eliminate slot ripples as far as possible, improve motor performance, so the thickness of magnetic sleeve is a critical data, thickness d can not be too thick, too thickly cause that then the gear tip clearance leakage field is excessive, can produce adverse effects such as torque reduction, can not be too thin, too thinly then can't provide enough magnetic fluxs, the effect of eliminating slot ripples is not remarkable, and the magnetic pull of enough thickness opposing rotors also will be arranged simultaneously.In addition, for the magnetic sleeve of basic structure, the width K of each ring can not be too wide, and too wide then eddy current is too big, but too narrow then manufacturability is poor.Different according to motor type and specification, thickness is between 0.2-10mm, the width of each ring of magnetic sleeve of basic structure will be taken all factors into consideration in conjunction with the service behaviour and the manufacturability of motor between 0.5-50mm, determines the width and the thickness data of ring according to experiment.For stator, the magnetic sleeve outside diameter equals circular diameter in the stator, it is that tight fit is nested in the stator internal circular surfaces, coat before nested bonding agent can strengthen the performance that the magnetic sleeve anti-vibration comes off and the ring that produces magnetic sleeve and encircle between and the insulating effect between the ring and the iron core flank of tooth.Except bonding method, can also adopt the method for electric resistance welding (being spot welding) that magnetic sleeve and iron core are welded as a whole, for large-size machine, adopt the method for spot welding will have higher reliability.
Several basic structures of magnetic sleeve are as follows:
1, describe the most basic a kind of structure earlier, the magnetic sleeve of Fig. 1 is made up of one group of annulus made from ferrimagnet (as silicon steel).Produce the square-section of plurality of specifications of rolling or the silicon steel silk of circular section earlier, again the silicon steel silk is cut into required length welding (butt welding, spot welding etc.) Cheng Huan.The thickness d of annulus should be determined by experiment.When material one timing, in order to guarantee to suppress effectively slot ripples, d increases along with the increase of width of rebate usually, and promptly thickness d is the increasing function of width of rebate T.Here proposing an estimation equation explanation thickness d is the increasing function of width of rebate T, for your guidance: d=G*B
δ* T/ (2*B
s), d is a magnetic sleeve thickness in the formula, B
δBe air gap flux density, T is the width of rebate that calculates with open slot, B
sBe the saturation magnetic induction of magnetic sleeve material, G is a correction factor.For micro-machine, the thickness of ring should be thinner, can adopt the thickness (as 0.35mm or 0.5mm) of existing silicon steel sheet, and silicon steel sheet is cut into the rectangular ring that is welded into again later.Then need to be customized to thick (as 1mm-10mm) silicon steel bar for the big motor of width of rebate, width K maximum can equate with the thickness of each iron leg core, but from reducing the angle of eddy current, angle from motor performance, ring width is the smaller the better, half of the iron core facewidth that should be not more than stator is more reasonable, and it is following for well, in order to avoid the eddy current of anchor ring is too big to be controlled at 10mm.Certainly, wideer also passable if emphasize technological words, just its eddy current loss is bigger than normal.What remark additionally is, the silicon steel ring is in that be inserted in can not be very round before the iron core, also there is no need silicon steel ring full circle, because the silicon steel ring set go into iron core can be forced later on by circle in the stator core circular, so thereby as long as formation tight fits such as the outer circumference that guarantees the silicon steel ring and stator inner periphery appearance are just passable.For rotor, available magnetic sleeve hoop is enclosed within rotor surface, also can with the winding method with the silicon steel line tightly around rotor surface.
2, the another kind of structure of magnetic sleeve is the spiral magnetic sleeve of Fig. 5, makes the material of a spiral shape in advance with ferrimagnet, and its cross section can be the rectangle or the circle of plurality of specifications, claims magnetic line.Treat that the iron core flank of tooth and magnetic line coat after the glue, this magnetic line is close to and is bonded in the spring-like that the coiling of iron core teeth surface is Fig. 5 that its head and the tail two ends are with spot welding or block fixing.
3, the magnetic sleeve structure also has multiple structure.Fig. 6 is the magnetic sleeve of the drum made by the monoblock soft magnetic material, the high and permeability height of this material requirements resistivity, and relatively good with regard to present employing ferrite, high sial steel or ultra high silicon aluminum steel, also available iron Magnaglo and adhesive glue are made.The eddy current of the metal made of one piece magnetic sleeve of Fig. 6 is very big, open some seams and can reduce eddy current, Fig. 7 severs some slits 6 vertically on the matrix of made of one piece magnetic sleeve, Fig. 8 is circumferential some slits 7 of severing in the matrix upper edge of made of one piece magnetic sleeve, and the injection resin glue is used for remedying intensity and reinforced insulation, the alternate manner of slot distribution shape is to imagine easily, can not be exhaustive.If the circumferential slot 7 among Fig. 8 cut a full circle, then Fig. 8 has become one group of magnetic sleeve of being made up of short magnetic rings same as in figure 1.Fig. 9 is the magnetic cover of a convolution, at position 11 corresponding to notch, with some nonmetallic materials (as resin or weaving method) one group of single magnetic annulus is combined into a complete magnetic sleeve, the 11st, combined part also is the part corresponding to notch.Whole magnetic sleeve is bonded on the iron core.
Owing to can the electromagnetic property of motor be exerted an influence after adding magnetic sleeve, so can be optimized design again to the structure of motor.
1, in the design of electrical motor, the purpose that the design of design of employing skewed slot and rotor slot-number ratio and more groove number design is to suppress slot ripples, because magnetic sleeve has suppressed slot ripples, so the design of design of the skewed slot of motor and rotor slot-number ratio and more groove number design just can be rethought, as long as suppressed slot ripples fully, just can reduce angle of bevel or cancellation skewed slot; The rotor slot-number ratio is approached or equal 1; Can correspondingly reduce the groove number.
2, behind the employing magnetic sleeve,, the open slot rule be can make into, copper factor and rule quality helped improving the motor of semi-enclosed slot and semi-open slot.
3, magnetic sleeve is actually one deck steel bushing, can play the effect that stops embedded coil to run out of notch, so as long as select the magnetic sleeve of higher stiffness and Rational Thickness for use, just can cancel slot wedge, reduces motor volume.
4, adopt magnetic sleeve later on how a magnetic circuit, the magnetic excitation circuit magnetic resistance is reduced, help improving the magnetic saturation degree of depth; For playing the armature reaction of demagnetizing effect, the magnetic sleeve bypass armature reaction magnetic flux, suppressed armature reaction; For increasing the armature reaction of magnetic action,, increase excitation magnetic potential again and can not make also that magnetic is close a big increase because that magnetic excitation circuit has been in the degree of depth is saturated.Above effect is equivalent to strengthen short circuit ratio, thus can correspondingly reduce air gap, thus reduce excitation loss, improve the efficient and the generate output of generator.
Adopt magnetic sleeve to cooperate the optimization design of electrical motor again, loss that can motor descends, and temperature rise reduces, thereby improves the capacity of the rated operation point of motor.
Magnetic sleeve can also improve the performance of direct current machine, and magnetic sleeve makes the neutral region between the N-S utmost point of motor widen with smooth, adds that the reactance electromotive force is also more smooth, and the commutation of motor is improved.This improvement makes air gap to reduce, thereby can reduce exciting power.
Description of drawings and embodiment
Fig. 1 is the basic structure of magnetic sleeve, by one group wide for K, thickly form for the magnetic annulus of d.Fig. 2 is the open slot motor stator, and slot opening is T.In magnetic sleeve is inserted in the stator of Fig. 2 behind the circle, stator has become the groove of remaining silent of Fig. 3 by the open slot of Fig. 2, and among Fig. 3,1 is magnetic sleeve, and 2 is stator core, and width of rebate is T.Fig. 4 is the rotor schematic diagram, and when iron core 4 was salient pole type, the magnetic sleeve of being adorned 3 differed and is decided to be circle, and the magnetic sleeve 3 of other forms of rotor is circular.Fig. 5 is spiral magnetic sleeve.Fig. 6 is the integral type magnetic sleeve.Fig. 7 is at the magnetic sleeve that slot 6 is axially arranged.Fig. 8 is the magnetic sleeve that circumferencial direction slot 7 is arranged.Fig. 9 is the convolution magnetic sleeve.
Claims (9)
1, the present invention is the motor of new construction, it is characterized in that electric machine iron core is made open slot, and embedded line refills magnetic sleeve later on, open slot is sealed become to remain silent groove.Fig. 2 is an open slot stator section, and Fig. 1 is a magnetic sleeve, and its most basic structure is made up of one group of magnetic annulus, insulation between ring and the ring.Magnetic sleeve can also have several structures of narrating later.After the embedded line circle, these ferromagnetic annulus are inserted in iron core, motor is the magnetic sleeve-type of Fig. 4 shape groove motor of remaining silent with regard to having become stator for Fig. 3 shape, rotor, and when rotor was salient pole type, magnetic sleeve was just not necessarily circular.The magnetic sleeve of Fig. 1 is enclosed within the inner surface of the stator core 2 of Fig. 2, makes the stator core inner surface become the smooth surface of Fig. 3 shape.Magnetic sleeve is made by ferromagnetism or ferrimagnetic material.Angle from motor performance, magnetic sleeve should be that the little and between cog leakage field of eddy current is little and capablely provide enough magnetic fluxs to the notch place, to eliminate slot ripples as far as possible, improve motor performance, so the thickness of magnetic sleeve is a critical data, thickness d can not be too thick, too thickly cause that then the gear tip clearance leakage field is excessive, can produce adverse effects such as torque reduction, can not be too thin, too thinly then can't provide enough magnetic fluxs, the effect of eliminating slot ripples is not remarkable, and the magnetic pull of enough thickness opposing rotors also will be arranged simultaneously.In addition, for the magnetic sleeve of basic structure, the width K of each ring can not be too wide, and too wide then eddy current is too big, but too narrow then manufacturability is poor.Different according to motor type and specification, thickness is between 0.2-10mm, the width of each ring of magnetic sleeve of basic structure will be taken all factors into consideration in conjunction with the service behaviour and the manufacturability of motor between 0.5-50mm, determines the width and the thickness data of ring according to experiment.For stator, the magnetic sleeve outside diameter equals circular diameter in the stator, it is that tight fit is nested in the stator internal circular surfaces, coat before nested bonding agent can strengthen the performance that the magnetic sleeve anti-vibration comes off and the ring that produces magnetic sleeve and encircle between and the insulating effect between the ring and the iron core flank of tooth.Except bonding method, can also adopt the method for electric resistance welding (being spot welding) that magnetic sleeve and iron core are welded as a whole, for large-size machine, adopt the method for spot welding will have higher reliability.
2, electric machine structure according to claim 1, its further feature are the structure of magnetic sleeve and the main technique of manufacturing.Describe the most basic a kind of structure earlier, the magnetic sleeve of Fig. 1 is made up of one group of annulus made from ferrimagnet (as silicon steel).Produce the square-section of plurality of specifications of rolling or the silicon steel silk of circular section earlier, again the silicon steel silk is cut into required length welding (butt welding, spot welding etc.) Cheng Huan.The thickness d of annulus should be determined by experiment.When material one timing, in order to guarantee to suppress effectively slot ripples, d increases along with the increase of width of rebate usually, and promptly thickness d is the increasing function of width of rebate T.Here proposing an estimation equation explanation thickness d is the increasing function of width of rebate T, for your guidance: d=G*B
δ* T/ (2*B
s), d is a magnetic sleeve thickness in the formula, B
δBe air gap flux density, T is the width of rebate that calculates with open slot, B
sBe the saturation magnetic induction of magnetic sleeve material, G is a correction factor.For micro-machine, the thickness of ring should be thinner, can adopt the thickness (as 0.35mm or 0.5mm) of existing silicon steel sheet, and silicon steel sheet is cut into the rectangular ring that is welded into again later.Then need to be customized to thick (as 1mm-10mm) silicon steel bar for the big motor of width of rebate, width K maximum can equate with the thickness of each iron leg core, but from reducing the angle of eddy current, angle from motor performance, ring width is the smaller the better, half of the iron core facewidth that should be not more than stator is more reasonable, and it is following for well, in order to avoid the eddy current of anchor ring is too big to be controlled at 10mm.Certainly, wideer also passable if emphasize technological words, just its eddy current loss is bigger than normal.What remark additionally is, the silicon steel ring is in that be inserted in can not be very round before the iron core, also there is no need silicon steel ring full circle, because the silicon steel ring set go into iron core can be forced later on by circle in the stator core circular, so thereby as long as formation tight fits such as the outer circumference that guarantees the silicon steel ring and stator inner periphery appearance are just passable.For rotor, available magnetic sleeve hoop is enclosed within rotor surface, also can with the winding method with the silicon steel line tightly around rotor surface.The magnetic sleeve of Fig. 1 is made up of one group of annulus made from ferrimagnet (as silicon steel).Produce the square-section of plurality of specifications of rolling or the silicon steel silk of circular section earlier, again the silicon steel silk is cut into required length welding (butt welding, spot welding etc.) Cheng Huan.When material one timing, in order to guarantee to suppress the too much increase that slot ripples also limits the tooth top leakage field simultaneously effectively, the thickness d of annulus is must be by the definite critical data of experiment, and d should increase along with the increase of width of rebate T, and promptly thickness d is the increasing function of width of rebate T.For micro-machine, the thickness of ring should be thinner, can adopt the thickness (as 0.35mm or 0.5mm) of existing silicon steel sheet, and silicon steel sheet is cut into the rectangular ring that is welded into again later.Then need to be customized to thick (as 0.8mm-10mm) silicon steel bar for the big motor of width of rebate, it is following for well that width K is controlled at 10mm, is welded into ring.From the angle of motor performance, ring width is narrow more good more, and half of the iron core facewidth that should be not more than stator is more reasonable, in order to avoid the eddy current of anchor ring is too big.Certainly, wideer also passable if emphasize technological words, just its eddy current loss is bigger than normal.What remark additionally is, the silicon steel ring is in that be inserted in can not be very round before the iron core, also there is no need silicon steel ring full circle, because the silicon steel ring set go into iron core can be forced later on by circle in the stator core circular, so thereby as long as formation tight fits such as the outer circumference that guarantees the silicon steel ring and stator inner periphery appearance are just passable.For rotor, available magnetic sleeve hoop is enclosed within rotor surface, also can with the winding method with the silicon steel line tightly around rotor surface.
3, electric machine structure according to claim 1, its further feature are spiral helicine magnetic sleeve structures.Fig. 5 is spiral magnetic sleeve, makes the material of a spiral shape in advance with ferrimagnet, and its cross section can be the rectangle or the circle of plurality of specifications, claims magnetic line.Treat that the iron core flank of tooth and magnetic line coat after the glue, this magnetic line is close to and is bonded in the spring-like that the coiling of iron core teeth surface is Fig. 5 that its head and the tail two ends are with spot welding or block fixing.
4, electric machine structure according to claim 1, its further feature are the multiple structures of magnetic sleeve structure.Fig. 6 is the magnetic sleeve of the drum made by the soft magnetic material of monoblock, this material requirements resistivity and permeability height, and relatively good with regard to present employing ferrite, high sial steel or ultra high silicon aluminum steel, also available iron Magnaglo and adhesive glue are made.The eddy current of the metal made of one piece magnetic sleeve of Fig. 6 is very big, open some seams and can reduce eddy current, Fig. 7 severs some slits 6 vertically on the matrix of made of one piece magnetic sleeve, Fig. 8 is circumferential some slits 7 of severing in the matrix upper edge of made of one piece magnetic sleeve, and the injection resin glue is used for remedying intensity and reinforced insulation, the alternate manner of slot distribution shape is to imagine easily, can not be exhaustive.If the circumferential slot 7 among Fig. 8 cut a full circle, then Fig. 8 has become one group of magnetic sleeve of being made up of short magnetic rings same as in figure 1.Fig. 9 is a woven magnetic cover, at position 11 corresponding to notch, with some nonmetallic materials (as resin or weaving method) one group of single magnetic annulus is combined into a complete magnetic sleeve, the 11st, combined part also is the part corresponding to notch.Whole magnetic sleeve is bonded on the iron core.
5, electric machine structure according to claim 1, its further feature is to revise the design of motor, the purpose that the design of design of employing skewed slot and rotor slot-number ratio and more groove number design is to suppress slot ripples, because magnetic sleeve has suppressed slot ripples, so the design of design of the skewed slot of motor and rotor slot-number ratio and more groove number design just can be rethought, as long as suppressed slot ripples fully, just can reduce angle of bevel or cancellation skewed slot; Slot-number ratio is approached or equal 1; Can correspondingly reduce the groove number.
6, electric machine structure according to claim 1, its further feature is to revise the design of motor aspect notch, behind the employing magnetic sleeve, for the motor of semi-enclosed slot and semi-open slot, the open slot rule be can make into, copper factor and rule quality helped improving.Magnetic sleeve-type motor is that an integral body is exactly the groove of remaining silent completely with magnetic sleeve and iron core spot welding.
7, electric machine structure according to claim 1, its further feature is to revise the design of motor aspect notch, magnetic sleeve is actually one deck steel bushing, can play the effect that stops embedded coil to run out of notch, as long as so select the magnetic sleeve of higher stiffness and Rational Thickness for use, just can cancel slot wedge, reduce motor volume.
8, electric machine structure according to claim 1, its further feature are the kind of air-gap design values that reduces generator.Adopt many magnetic circuits behind the magnetic sleeve, the magnetic excitation circuit magnetic resistance is reduced, help improving the magnetic saturation degree of depth; For playing the armature reaction of demagnetizing effect, the magnetic sleeve bypass armature reaction magnetic flux, suppressed armature reaction.For increasing the armature reaction of magnetic action,, increase excitation magnetic potential again and can not make also that magnetic is close a big increase because that magnetic excitation circuit has been in the degree of depth is saturated.Above effect is equivalent to strengthen short circuit ratio, can correspondingly reduce air gap, thereby reduce excitation loss.
9, electric machine structure according to claim 1, its further feature is the application of magnetic sleeve aspect direct current machine, magnetic sleeve makes the neutral region between the N-S utmost point of motor widen with smooth, adds that the reactance electromotive force is also more smooth, and the commutation of motor is improved.This improvement makes air gap to reduce, thereby can reduce exciting power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108145 CN1205567A (en) | 1997-07-11 | 1997-07-11 | Magnetic sleeve electromachine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108145 CN1205567A (en) | 1997-07-11 | 1997-07-11 | Magnetic sleeve electromachine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1205567A true CN1205567A (en) | 1999-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97108145 Pending CN1205567A (en) | 1997-07-11 | 1997-07-11 | Magnetic sleeve electromachine |
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| Country | Link |
|---|---|
| CN (1) | CN1205567A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902085A (en) * | 2010-07-14 | 2010-12-01 | 湖北省天胶化工有限公司 | Novel motor stator line embedding groove and detachable arc-shaped groove sealing piece |
| CN102290944A (en) * | 2011-08-10 | 2011-12-21 | 徐州工业职业技术学院 | Permanent magnet synchronous motor with closed slots |
| CN102684440A (en) * | 2011-07-29 | 2012-09-19 | 华锐风电科技(集团)股份有限公司 | Low-speed permanent magnet synchronous generator |
| CN103036328A (en) * | 2011-09-29 | 2013-04-10 | 华锐风电科技(集团)股份有限公司 | Stator, manufacture method and motor |
| CN103160731A (en) * | 2013-03-28 | 2013-06-19 | 江苏神王集团有限公司 | Hot drawing high-silicon steel wire and production method thereof |
-
1997
- 1997-07-11 CN CN 97108145 patent/CN1205567A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902085A (en) * | 2010-07-14 | 2010-12-01 | 湖北省天胶化工有限公司 | Novel motor stator line embedding groove and detachable arc-shaped groove sealing piece |
| CN102684440A (en) * | 2011-07-29 | 2012-09-19 | 华锐风电科技(集团)股份有限公司 | Low-speed permanent magnet synchronous generator |
| CN102290944A (en) * | 2011-08-10 | 2011-12-21 | 徐州工业职业技术学院 | Permanent magnet synchronous motor with closed slots |
| CN103036328A (en) * | 2011-09-29 | 2013-04-10 | 华锐风电科技(集团)股份有限公司 | Stator, manufacture method and motor |
| CN103160731A (en) * | 2013-03-28 | 2013-06-19 | 江苏神王集团有限公司 | Hot drawing high-silicon steel wire and production method thereof |
| CN103160731B (en) * | 2013-03-28 | 2017-05-31 | 江苏神王集团有限公司 | A kind of hot drawing high-silicon steel silk material and preparation method thereof |
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