CN101588092A - Rotating electrical machine - Google Patents
Rotating electrical machine Download PDFInfo
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- CN101588092A CN101588092A CNA2009101392146A CN200910139214A CN101588092A CN 101588092 A CN101588092 A CN 101588092A CN A2009101392146 A CNA2009101392146 A CN A2009101392146A CN 200910139214 A CN200910139214 A CN 200910139214A CN 101588092 A CN101588092 A CN 101588092A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 125
- 239000010959 steel Substances 0.000 claims abstract description 125
- 238000004804 winding Methods 0.000 claims abstract description 36
- 230000035699 permeability Effects 0.000 claims abstract description 26
- 238000004080 punching Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 58
- 230000004907 flux Effects 0.000 claims description 45
- 239000002826 coolant Substances 0.000 claims description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 36
- 238000005520 cutting process Methods 0.000 claims description 18
- 230000004087 circulation Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 5
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000005415 magnetization Effects 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.
Description
Technical field
The present invention relates to electric rotating machine, relate to and for example adopt on turbogenerator etc. and its stator core is suitable for the electric rotating machine of the iron core that stacked electromagnetic steel plate forms.
Background technology
Stator core explanation conventional example about large-scale electric rotating machine.As shown in figure 11, the stator core of large-scale electric rotating machine such as turbogenerator, by steel plate is become fan-shaped cutting plate and it is along the circumferential direction arranged a plurality of circles that form from the steel band punching, simultaneously stacked vertically many and constitute drum.Fig. 8 represents an example of cutting plate.Cutting plate constitutes by the tooth portion 1 of clamping the groove 3 that is used to insert not shown winding with as the rear of core 2 of the peripheral part of this tooth portion 1.
The formation that has the stator core of electric rotating machine now is illustrated among Fig. 9 and Figure 10.Fig. 9 is a cutaway view of having observed stator core from circumferencial direction, expression radially half, near the part of axial end.In addition, Figure 10 is the figure that has radially observed stator core from internal side diameter, and is corresponding with the direction of representing with the arrow A of Fig. 9.As shown in figure 10, form cooling duct 5 by in stator core 4, inserting I type interchannel partition 8 and the gap being set, make cooling agent in cooling duct 5 radially circulation and cool off iron core and armature winding 6.
Figure 12 represents the structure example of existing electric rotating machine.This example has heat exchanger, is illustrated in the electric rotating machine of the form that makes circulate coolant in the machine and cool off.
Usually, electric rotating machine possess the rotor 7 that forms in rotor core coiling excitation winding with this rotor 7 with the relative stator that disposes and in stator core 4, reel armature winding (stator winding) 6 and form of specified gap (being also referred to as air-gap), the cutting plate that stator core 4 will be made of the rear of core 2 of the tooth portion 1 that is used to insert armature winding 6 and its peripheral part is from the electromagnetic steel plate punching, and along the circumferential direction arranges this cutting plate a plurality of and make behind the circle stacked vertically a plurality of and roughly constitute.
In the electric rotating machine of this formation, the part of the cooling agent that is boosted by fan 23 is that air-gap flows from axial end towards the space radially of mediad rotor 7 and rotor 7 and stator, and cooling off stator core 4 and armature winding 6 at the exhaust gas region 26 of stator core 4 circulations, and remove heat after fan 23 is arrived on coolant flow road 25 once more at heat exchanger 29 along the external diameter direction.
In addition, remaining cooling agent flows and behind coolant flow road 25 to the external diameter direction from fan 23, arrive air-gap along internal diameter direction in 27 cooling stator cores 4 of air feed zone and armature winding 6 backs that stator core 4 is flowed, cooling stator core 4 and armature winding 6, and at air-gap and the cooling agent interflow that flows into to exhaust gas region 26.
During the electric rotating machine running, main heating position is the winding that electric current is switched on.In large-scale electric rotating machine, between the lamination steel plate, form the cooling duct in order to cool off this heating as mentioned above like that, cool off winding and stator core thereby cooling agent is radially circulated.
At this moment, in electric rotating machine, because axle is positioned at the downstream in coolant flow path near the center, thereby cooling agent becomes high temperature, and cooling effect reduces.Therefore, near the axle center, increase the cooling duct number of axial unit length sometimes, increase the amount of coolant of circulation.
In stator core,, thereby produce loss and heating on the other hand because of exchange flux works.Especially be the electric rotating machine of 2 utmost points or 4 utmost points at the number of magnetic poles that is used for the rotor on turbogenerator etc., the volume in the path that magnetic flux passed through of tooth portion is less among the iron core, and magnetic flux density uprises, thereby heat generation density is bigger.On this basis, as mentioned above like that if increase the cooling duct number of axial unit length, from the part, compare minimizing as the volume of the iron core of magnetic with other position, so magnetic flux density unshakable in one's determination increases, and loss also increases.In other words, increase port number in order to cool off winding, then might losing promptly at iron core, heating increases.
In addition, be formed with respectively in the electric rotating machine of the ventilation circuit of a plurality of aerated areas of the external diameter direction of cooling duct and internal diameter direction circulation cooling agent having constituted, the aerated area in the downstream that is positioned at ventilating path, the temperature of cooling agent rises.
On the other hand in the axial end portion tooth portion of stator, by from the magnetic flux of rotor incident vertically and in the axial cross section of tooth portion, produce eddy current.The size of the loss that brings because of this eddy current, relevant with the sectional area of the magnetic flux density of incident and tooth portion, and the position that produces for local, it is the situation that tooth portion front end becomes high temperature that loss generating unit position is arranged.Particularly at the bigger machinery of electric loading, because of reasons such as electric current are big, coil-end length is long, become big from the magnetic flux leakage increase and the loss of coil-end, thereby also shown in TOHKEMY 2006-74880 communique, in the stator core end tapering part is set like that, perhaps otch is set and waits and implement the example that reduces loss and strengthen the plan of cooling at the axial cross section of tooth portion.
As in the foregoing particularly the tooth portion of stator core end produce the countermeasure of loss, the direction of easy axis example consistent with the flow direction of tooth portion that makes steel plate in the stator core end has been shown in the USP7057324 communique.But, because the flow direction of tooth portion and the flow direction quadrature of rear of core, so have at the rear of core magnetic flux and be difficult for passing through, thereby cause losing the possibility of increase.
In addition, as the example that reduces heating unshakable in one's determination, the example of alternately laminated orientation steel plate and non orientation steel plate has been shown in TOHKEMY 2000-50539 communique, the example at the stacked amorphous metal plate in stator core end has been shown in Japanese kokai publication sho 61-62334 communique.No matter these are that the easy of magnetic flux which all is conceived to stacked steel plate passes through and iron loss, and realize that by stacked multiple steel plate heating reduces.
Patent documentation 1: TOHKEMY 2006-74880 communique
Patent documentation 2:USP7057324 communique
Patent documentation 3: TOHKEMY 2000-50539 communique
Patent documentation 4: Japanese kokai publication sho 61-62334 communique
Yet the characteristic of magnetization of magnetic is non-linear, and the easy of magnetic flux is that permeability is according to the change in magnetic flux density that is acted on by degree.In electric rotating machine in recent years, improve output density and make the design of miniaturization more, act on the also most high magnetic flux densities that are bordering on saturation magnetization of setting for of magnetic flux density of stator core.In the occasion that makes the magnetic flux density effect that is bordering on saturation magnetization, thereby because the permeability of magnetic becomes and the equal magnetic resistance of air becomes big, also exist magnetic flux similarly axially circuitous in above-mentioned end, the magnetic flux of stack direction increases, the possibility that loss increases.
Summary of the invention
The present invention finishes in view of the above problems, and its purpose is to provide a kind of temperature that is conceived to electric rotating machine, especially improve stator winding nearby Temperature Distribution and realize the electric rotating machine that reliability improves.
For achieving the above object, electric rotating machine of the present invention possess the rotor that forms in rotor core coiling excitation winding with this rotor with the relative configuration of specified gap and in stator core coiling stator winding and the stator that forms, the said stator iron core constitutes: the cutting plate that is made of the rear of core of toothed portion that is used to insert the said stator winding and peripheral part from the electromagnetic steel plate punching, and along the circumferential direction arrange this cutting plate a plurality of and make the circle after stacked vertically many, it is characterized in that the said stator iron core is laminated with the radially different electromagnetic steel plate of permeability at the axial end portion of this stator core with central portion.
Specifically, it is characterized in that: the radially permeability of the electromagnetic steel plate of the axial central portion of said stator iron core is than the radially permeability height of the electromagnetic steel plate of axial end portion; Perhaps, be laminated with many orientation electromagnetic steel plates, be laminated with many non orientation electromagnetic steel plates at axial central portion at the axial end portion of said stator iron core; And then the thickness of the electromagnetic steel plate of the axial central portion of said stator iron core is thicker than the thickness of the electromagnetic steel plate of axial end portion.
Adopt the present invention, owing to improved stator winding Temperature Distribution nearby, thereby bring the effect that the electric rotating machine with high-reliability can be provided.
Description of drawings
Fig. 1 is near the cutaway view of axial end portion of first execution mode of expression electric rotating machine of the present invention.
Fig. 2 is near the cutaway view of axial end portion of second execution mode of expression electric rotating machine of the present invention.
Fig. 3 is near the figure of axial end portion of the coolant flow road warp of expression second embodiment of the invention.
Fig. 4 is near the figure the axial end portion of coolant flow road warp of the 3rd execution mode of expression electric rotating machine of the present invention.
Fig. 5 is near the cutaway view of axial end portion of the 3rd execution mode of expression electric rotating machine of the present invention.
Fig. 6 is the phantom of the laminated core of expression second embodiment of the invention.
Fig. 7 is the amplifier section cutaway view of the laminated core of expression four embodiment of the invention.
Fig. 8 is that expression is from the figure of employing at the cutting plate unshakable in one's determination of the steel band punching of stator core.
Fig. 9 is the cutaway view of axial end portion of the stator core of the existing electric rotating machine of expression.
Figure 10 is the figure that the cooling duct portion of existing electric rotating machine is radially observed from internal side diameter.
Figure 11 is that expression is from adopting the figure at the steel band punching cutting plate of stator core.
Figure 12 cuts existing electric rotating machine open a part and the stereogram represented.
Figure 13 is the amplifier section cutaway view of laminated core of the 5th execution mode of expression electric rotating machine of the present invention.
Symbol description
1-tooth portion, 2-air bag, 3-groove, 4-iron core, the 5-cooling duct, 6-armature winding, 7-rotor, 8-interchannel partition, 10,34-orientation electromagnetic steel plate, 11, the 33-non orientation electromagnetic steel plate, the 23-fan, the 24-air-gap, 25-coolant flow road, 26-exhaust gas region, 27-air feed zone, 28-dividing plate, 29-heat exchanger, 30-air inlet, 31-exhaust outlet, the 32-enamelled coating that insulate.
Embodiment
The execution mode of electric rotating machine of the present invention below is described with reference to the accompanying drawings.In addition, as for symbol, with the identical in the past identical symbol of parts use.
[embodiment 1]
Fig. 1 represents first execution mode of electric rotating machine of the present invention, is the cutaway view of having observed stator core 4 from circumferencial direction, expression radially half, near the part of axial end.
Axial end portion in the stator core 4 shown in this figure is laminated with orientation electromagnetic steel plate 10, be laminated with non orientation electromagnetic steel plate 11 at axial central portion, shown in Figure 11 (a), the cutting plate along the direction punching vertical with rolling direction constitutes from each steel band by tooth portion 1.Therefore, the circumferencial direction of stator core roughly is equivalent to rolling direction, radially roughly is equivalent to the direction vertical with rolling direction.
Thus, in the present embodiment, stator core 4 is laminated with the radially different electromagnetic steel plate of permeability at the axial end portion of this stator core 4 with central portion.
In the present embodiment, as the steel plate that is used for stator core 4, suppose the general electromagnetic steel plate that uses on electric rotating machine.As everyone knows, orientation electromagnetic steel plate 10 is better than non orientation electromagnetic steel plate 11 for the permeability of rolling direction in general, on the other hand, is lower than the permeability of non orientation electromagnetic steel plate 11 on the direction vertical with rolling direction.
Therefore,, compare, can reduce the heating in the tooth portion 1 of stator core in the part of having used non orientation electromagnetic steel plate 11 with the heating of the part of having used orientation electromagnetic steel plate 10 if be conceived to the heating of tooth portion 1.
As one of modification of present embodiment, as the index that the magnetic flux in the tooth portion 1 passes through easily, the permeability in the time of also can adopting magnetic flux density to be 1.5T.In general, the saturation magnetization that is used for the electromagnetic steel plate of electric rotating machine is about 2T, and its characteristic of magnetization is about 1.5T, and gradient changes significantly.In the tooth portion 1 of stator core 4, become the occasion of the magnetic flux density that is bordering on magnetic saturation at radial magnetic flux density, magnetic resistance increases, and loss increases thereupon.
To this, the index of passing through easily as the magnetic flux in the tooth portion 1 of stator core 4 in the present invention, permeability when adopting 1.5T, radially permeability when constituting the 1.5T of employed orientation electromagnetic steel plate 10, non orientation electromagnetic steel plate 11 about this selects material to make non orientation electromagnetic steel plate 11 better than orientation electromagnetic steel plate 10.Thus, even if in the electric rotating machine of the peakflux density that has designed tooth portion 1 with the magnetic flux density that is bordering on saturation magnetization, also can suppress the heating of tooth portion 1.
In addition, even if using as index, the magnetic flux density that the magnetizing force that general non orientation electromagnetic steel plate 11 can be reached the magnetic flux density about 1.5T is magnetic field when being 5000A/m also can obtain same effect.
In addition, in the present embodiment, orientation electromagnetic steel plate 10 stacked part be the axial end portion of stator core 4, non orientation electromagnetic steel plate 11 stacked part be the axial central portion of stator core 4.
[embodiment 2]
Fig. 3 represents the circulation flow path warp of the cooling agent of second embodiment of the invention, is the cutaway view of having observed stator core 4 from circumferencial direction, expression radially half, the axial zone of half.
Arrow is represented the circulating direction of cooling agent among the figure, be the cooling agent that coolant flow has been boosted by fan 23, arrive stator core 4 through rotor 7 and air-gap 24, pass through cooling duct (not shown) final vacuum while cooling off armature winding 6 and stator core 4, perhaps behind over-heat-exchanger, circulate to the air inlet road once more.
Fig. 2 is the formation of the stator core 4 of second execution mode of the present invention.As shown in the drawing, in the present embodiment, constitute axial central portion in stator core 4, make the axially spaced-apart ratio of 5 of cooling ducts that axial length unshakable in one's determination is narrow divided by the axially spaced-apart between the average channel of total cooling duct number, and coolant flow is increased.In the occasion that has been suitable for existing formation, make the narrow part of axially spaced-apart of 5 of cooling ducts in the cooling duct number increase that makes axial unit length, because the minimizing of the volume of magnetic, thereby magnetic flux density unshakable in one's determination increase, losing also increases.
To this, in the present embodiment,, suppose the general electromagnetic steel plate that uses on electric rotating machine as the steel plate that is used for stator core 4.And, 5 axially spaced-apart is than the average wide stacked orientation electromagnetic steel plate 10 that manys of axial end portion in the cooling duct, 5 axially spaced-apart is than the average narrow stacked non orientation electromagnetic steel plate 11 that manys of axial central portion in the cooling duct, thereby shown in Figure 11 (a), constitute stator core 4 by cutting plate from each steel band punching.
Promptly, at the axial end portion of stator core 4 with stacked many and form one group and it is clipped three groups of cooling duct 5 configurations of orientation electromagnetic steel plate 10, on the other hand at axial central portion with stacked many and form one group and it is clipped cooling duct 5 configurations a plurality of (being three groups in illustrated state) of non orientation electromagnetic steel plate 11, the one group of axial width of the axial end portion that is laminated with a plurality of orientation electromagnetic steel plates 10 that constitutes this moment is wideer than one group of axial width of the axial central portion that is laminated with a plurality of non orientation electromagnetic steel plates 11.
Thus, 5 axially spaced-apart is than average narrow axial central portion in the cooling duct, radially permeability is higher, if be conceived to the heating of tooth portion, compare with the heating of the part of having used orientation electromagnetic steel plate 10, can reduce the heating in the tooth portion of stator core 4 in the part of having used non orientation electromagnetic steel plate 11.
Fig. 6 is the arrow B that is illustrated in Fig. 2 has been observed stator core 4 from rotor-side figure.In Fig. 6,, the stator core that is configured in stacked orientation electromagnetic steel plate 10 and constitutes and stacked non orientation electromagnetic steel plate 11 have been formed and interchannel partition 8 between the stator core that constitutes with nonmagnetic substance as one of modified example of the present invention.
By such formation, can reduce the magnetic flux of incident interchannel partition 8, thereby because of loss reduce can prevent overheated.
In the present embodiment, though in order to make accompanying drawing succinctly make the cooling duct number is 11, the axially spaced-apart between the cooling duct and the kind of steel plate are two kinds, but the cooling duct number can be for more than the dozens of, and the axially spaced-apart between the cooling duct and the kind of steel plate can be for more than three kinds.
In addition, in the present embodiment, to be laminated with three groups part be the axial end portion of stator core 4 to orientation electromagnetic steel plate 10 in Fig. 2, and all the other group parts that are laminated with non orientation electromagnetic steel plate 11 are the axial central portion of stator core 4.
[embodiment 3]
Fig. 4 represents the circulation flow path warp of the cooling agent of third embodiment of the invention.Be the cutaway view of similarly observing with Fig. 3 from circumferencial direction, expression radially half, the axial zone of half.
Illustrated arrow is represented the circulating direction of cooling agent, be the cooling agent that coolant flow has been boosted by fan 23, be positioned at the stator core 4 and the armature winding 6 of the exhaust gas region 26 of axial end portion and central portion through cooling behind rotor 7 and the air-gap 24, by cooling duct (not shown) final vacuum, perhaps behind over-heat-exchanger, circulate to the air inlet road once more.At this moment, the part of the cooling agent that boosts by fan 23 after having cooled off armature winding 6 through the stator core 4 and the armature winding 6 in coolant flow road 25 and cooling air feed zone 27, thereafter, at air-gap 24 and cooling agent interflow in rotor 7 and air-gap 24 circulations, and cooling duct (not shown) final vacuum by exhaust gas region 26, perhaps behind over-heat-exchanger, circulate to the air inlet road once more.
Fig. 5 represents the formation of the stator core of second execution mode of the present invention.In the figure, the exhaust gas region 26b that is positioned at axial central portion constitutes by stacked non orientation electromagnetic steel plate 11, and the exhaust gas region 26a beyond this exhaust gas region 26b, air feed zone 27a and 27b constitute by stacked orientation electromagnetic steel plate 10.Here, non orientation electromagnetic steel plate 11 is made of the cutting plate from the steel band punching shown in Figure 11 (a).
Following exhaust gas region 26b in the downstream that is positioned at coolant flow road warp, cooling agent mainly flow into behind following air feed zone 27a and the 27b having passed through, so can reckon with and become high temperature.Here, in the present embodiment, make the axially spaced-apart between the cooling duct of exhaust gas region 26b narrower for the coolant flow amount that increases the exhaust gas region 26b that is positioned at axial central portion than on average.
If be described more specifically, the exhaust gas region 26a of the axial end portion of stator core 4 is with stacked many and form one group and it is clipped three groups of cooling duct 5 configurations of orientation electromagnetic steel plate 10, be positioned at the air feed zone 27a of axial central portion and 27b with stacked many and form one group and it is clipped two groups of cooling duct 5 configurations of orientation electromagnetic steel plate 10, on the other hand, axially the exhaust gas region 26b of central portion with stacked many and form one group and it is clipped cooling duct 5 three groups of configurations and constitute stator core 4 of non orientation electromagnetic steel plate 11.
And, one group of axial width of the axial end portion that is laminated with a plurality of orientation electromagnetic steel plates 10 of regional 27a of air feed this moment and 27b is the wideest, next is the one group of axial width of the axial end portion that is laminated with a plurality of orientation electromagnetic steel plates 10 that is positioned at the exhaust gas region 26a of axial end portion, and the narrowest is the one group of axial width that is laminated with a plurality of non orientation electromagnetic steel plates 11 that is positioned at the exhaust gas region 26b of axial central portion.The axial width of one group of size that is positioned at the exhaust gas region 26a of axial end portion also can be identical with the axial width of one group of size of air feed zone 27a that is positioned at axial central portion and 27b.
In addition, in the present embodiment, though 26a also is an exhaust gas region, but owing to can reckon with and be positioned at axial central portion and passed through the cooling agent of air feed zone 27a and 27b and passed through the coolant temperature of the exhaust gas region 26b that cooling agent circulated of rotor 7 higher, therefore, only constitute at the stacked non orientation electromagnetic steel plate 11 of exhaust gas region 26b.
In the present embodiment, the index of passing through easily as the magnetic flux in the tooth portion of stator core, permeability when adopting 1.5T, radially permeability when being 1.5T about this magnetic flux density that constitutes employed orientation electromagnetic steel plate 10, non orientation electromagnetic steel plate 11 selects material to make that non orientation electromagnetic steel plate 11 is better than orientation electromagnetic steel plate.Thus, can reduce result from because of the magnetic volume in air feed zone reduce that the magnetic flux density that causes increases to axial flux return, suppress heating.
In the present embodiment, though in order to make accompanying drawing succinct and to make aerated area be that 7, cooling duct number are 17, aerated area can for beyond 7 arbitrarily, the cooling duct number can be for more than the dozens of.
As one of modification of present embodiment, as the index that the magnetic flux in the tooth portion passes through easily, the permeability the when permeability in the time of also can replacing magnetic flux density to be 1.5T adopts magnetic field to be 5000A/m.
In addition, in the present embodiment, to be laminated with the exhaust gas region 26a of three groups part be the axial end portion of stator core 4 to orientation electromagnetic steel plate 10 in Fig. 5, and remaining all the other exhaust gas region 26b, air feed zone 27a and 27b that is laminated with non orientation electromagnetic steel plate 11 is the axial central portion of stator core 4.
[embodiment 4]
Fig. 7 is the enlarged drawing of iron core of expression four embodiment of the invention, and the arrow C that Fig. 7 is illustrated in Fig. 1 has been observed the figure of stator core from rotor-side.With regard to the formation of iron core, with the similarly close axially central stacked non orientation electromagnetic steel plate 11 of Fig. 1, at the stacked orientation electromagnetic steel plate 10 of axial end portion.
In the present embodiment, near the non orientation electromagnetic steel plate 33 that axial central stacked thickness is 0.5mm, be the orientation electromagnetic steel plate 34 of 0.35mm at the stacked thickness of axial end portion, the insulation enamelled coating 32 of granting between the steel plate is identical thickness.
In the first embodiment the use of being put down in writing the part of non orientation electromagnetic steel plate 11 reduce the heating of the tooth portion of stator core, on this basis, with regard to the heat conduction in the steel plate, direction is better than stack direction in the face, thereby be that the part near central authorities of the non orientation electromagnetic steel plate 33 of 0.5mm makes good to the heat conduction of rear of core from tooth portion at stacked thickness, thereby near the temperature that can relax the winding rises.
In addition, in the occasion of using thickness with equal resistivity as the electromagnetic steel plate of 0.5mm, having eddy current loss is the possibility that the electromagnetic steel plate of 0.35mm increases than thickness.To this, as one of modification of present embodiment, by use resistivity than thickness as the steel plate of the high thickness of the steel plate of 0.35mm as 0.5mm, can realize that eddy current loss reduces, and increases core volume simultaneously.
[embodiment 5]
Figure 13 is the enlarged drawing of iron core of expression fifth embodiment of the invention, and the arrow B that Figure 13 is illustrated in Fig. 2 and Fig. 5 has been observed the figure of stator core from rotor-side.
As shown in figure 13, the stacked thickness of part that axially spaced-apart between the cooling duct is narrow or exhaust gas region is the non orientation electromagnetic steel plate 33 of 0.5mm, the wide stacked thickness of part of axially spaced-apart between the cooling duct is the orientation electromagnetic steel plate 34 of 0.35mm, and the insulation enamelled coating 32 of granting between the steel plate is identical thickness.
Such as in second execution mode record, the narrow part of the axially spaced-apart between the cooling duct makes the magnetic flux density of tooth portion increase because the volume of magnetic reduces, and is difficult for passing through in radial flux.Arrive axially in the flux return that radially is difficult for passing through, except in electromagnetic steel plate, pass through to produce the iron loss axial cross section generation eddy current loss because of magnetic flux in tooth portion.To this, in the present embodiment, be the volume that the non orientation electromagnetic steel plate 33 of 0.5mm increases magnetic by the stacked thickness of the narrow part of the axially spaced-apart between the cooling duct, the magnetic flux density that suppresses tooth portion increases, and reduces the magnetic flux to axial backflow.
In addition, because with regard to the heat conduction in the electromagnetic steel plate, direction is better than stack direction in the face, thereby by being the non orientation electromagnetic steel plate 33 of 0.5mm at the stacked thickness of exhaust gas region, make from tooth portion better to the heat conduction of rear of core than the zone of the orientation electromagnetic steel plate 34 of stacked 0.35mm, thereby near the temperature that can relax the winding rises.
In the occasion of using thickness with equal resistivity as the electromagnetic steel plate of 0.5mm, having eddy current loss is the possibility that the steel plate of 0.35mm increases than thickness.To this, as one of modification of present embodiment, by use resistivity than thickness as the steel plate of the high thickness of the steel plate of 0.35mm as 0.5mm, can realize that eddy current loss reduces, and increases core volume simultaneously.
Claims (16)
1. electric rotating machine, possess the rotor that forms in rotor core coiling excitation winding with this rotor with the relative configuration of specified gap and in stator core coiling stator winding and the stator that forms, the said stator iron core constitutes: the cutting plate that is made of the rear of core of toothed portion that is used to insert the said stator winding and peripheral part from the electromagnetic steel plate punching, and along the circumferential direction arrange this cutting plate a plurality of and make the circle after stacked vertically many, it is characterized in that
The said stator iron core is laminated with the radially different electromagnetic steel plate of permeability at the axial end portion of this stator core with central portion.
2. electric rotating machine according to claim 1 is characterized in that,
The radially permeability of the electromagnetic steel plate of said stator its axial central portion unshakable in one's determination is than the radially permeability height of the electromagnetic steel plate of axial end portion.
3. electric rotating machine according to claim 1 is characterized in that,
The said stator iron core is laminated with many orientation electromagnetic steel plates at axial end portion, is laminated with many non orientation electromagnetic steel plates at axial central portion.
4. according to each described electric rotating machine of claim 1 to 3, it is characterized in that,
The thickness of the electromagnetic steel plate of the axial central portion of said stator iron core is thicker than the thickness of the electromagnetic steel plate of axial end portion.
5. electric rotating machine according to claim 1 is characterized in that,
The radially permeability of the axial end portion of said stator iron core and central portion, difference when magnetic flux density is 1.5T.
6. electric rotating machine according to claim 1 is characterized in that,
The radially permeability of the axial end portion of said stator iron core and central portion, the difference when being 5000A/m in magnetic field.
7. electric rotating machine, possess the rotor that forms in rotor core coiling excitation winding with this rotor with the relative configuration of specified gap and in stator core coiling stator winding and the stator that forms, the said stator iron core constitutes: the cutting plate that is made of the rear of core of toothed portion that is used to insert the said stator winding and peripheral part from the electromagnetic steel plate punching, and along the circumferential direction arrange this cutting plate a plurality of and make the circle after stacked vertically many, and, be formed with in the axial middle part of said stator iron core and a plurality ofly be used to make cooling agent in the cooling duct of circulation radially, it is characterized in that
The said stator iron core is at the axial end portion and the central portion of this stator core, the axially spaced-apart difference between its above-mentioned cooling duct, and the axially spaced-apart different piece between this cooling duct, the kind difference of stacked electromagnetic steel plate.
8. electric rotating machine according to claim 7 is characterized in that,
Axially spaced-apart between the above-mentioned cooling duct of the axial end portion of said stator iron core is narrower than the axially spaced-apart between the above-mentioned cooling duct of axial central portion, and the wide part and the narrow part of the axially spaced-apart between above-mentioned cooling duct are laminated with different types of electromagnetic steel plate.
9. according to claim 7 or 8 described electric rotating machines, it is characterized in that,
The stacked orientation electromagnetic steel plate that has or not of part that axially spaced-apart between the above-mentioned cooling duct of the axial central portion of said stator iron core is narrow, remaining part is laminated with orientation electromagnetic steel plate.
10. electric rotating machine according to claim 7 is characterized in that,
The high electromagnetic steel plate of radially permeability of the said stator iron core when respectively magnetic flux density being 1.5T is layered in the narrow part of axially spaced-apart between above-mentioned cooling duct, and the electromagnetic steel plate that radially permeability is low is layered in the wide part of axially spaced-apart between above-mentioned cooling duct and constitutes stator core.
11. electric rotating machine according to claim 7 is characterized in that,
The high steel plate of radial magnetic flux density of the said stator iron core when respectively magnetic field being 5000A/m is layered in the narrow part of axially spaced-apart between above-mentioned cooling duct, and the steel plate that radial magnetic flux density is low is layered in the wide part of axially spaced-apart between above-mentioned cooling duct and constitutes stator core.
12. electric rotating machine, possess the rotor that forms in rotor core coiling excitation winding with this rotor with the relative configuration of specified gap and in stator core coiling stator winding and the stator that forms, the said stator iron core constitutes: the cutting plate that is made of the rear of core of toothed portion that is used to insert the said stator winding and peripheral part from the electromagnetic steel plate punching, and along the circumferential direction arrange this cutting plate a plurality of and make the circle after stacked vertically many, and, be formed with in the axial middle part of said stator iron core and a plurality ofly be used to make cooling agent in the cooling duct of circulation radially, a plurality ofly make the cooling agent in the machine make cooling agent in the machine from the external diameter direction of above-mentioned cooling duct air inlet zone on the contrary towards the exhaust gas region of external diameter direction circulation with this exhaust gas region axially having towards the internal diameter direction circulation from the internal diameter direction of above-mentioned cooling duct, it is characterized in that
The said stator iron core is laminated with different types of electromagnetic steel plate in the exhaust gas region that is positioned at axial central portion and remaining exhaust and air inlet zone.
13. electric rotating machine according to claim 12 is characterized in that,
The said stator iron core is laminated with non orientation electromagnetic steel plate at the exhaust gas region that is positioned at axial central portion, is laminated with orientation electromagnetic steel plate in remaining exhaust and air inlet zone.
14. according to claim 12 or 13 described electric rotating machines, it is characterized in that,
With regard to said stator was unshakable in one's determination, the axially spaced-apart that is positioned between the above-mentioned cooling duct of exhaust gas region of axial central portion was narrower than the axially spaced-apart between the above-mentioned cooling duct in exhaust beyond the exhaust gas region that is positioned at axial central portion and air inlet zone.
15. electric rotating machine according to claim 12 is characterized in that,
The low electromagnetic steel plate of radially permeability of the said stator iron core when respectively magnetic flux density being 1.5T is layered in above-mentioned air inlet zone, and the electromagnetic steel plate that radially permeability is high is layered in above-mentioned exhaust gas region and constitutes stator core.
16. electric rotating machine according to claim 12 is characterized in that,
The low electromagnetic steel plate of radial magnetic flux density of the said stator iron core when respectively magnetic field being 5000A/m is layered in above-mentioned air inlet zone, and the steel plate that radial magnetic flux density is high is layered in above-mentioned exhaust gas region and constitutes stator core.
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| JP2008114765 | 2008-04-25 | ||
| JP2008-114765 | 2008-04-25 | ||
| JP2008114765 | 2008-04-25 | ||
| JP2009101527A JP4528865B2 (en) | 2008-04-25 | 2009-04-20 | Rotating electric machine |
| JP2009-101527 | 2009-04-20 | ||
| JP2009101527 | 2009-04-20 |
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| CN101588092A true CN101588092A (en) | 2009-11-25 |
| CN101588092B CN101588092B (en) | 2012-10-10 |
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| CN2009101392146A Active CN101588092B (en) | 2008-04-25 | 2009-04-23 | Rotating electrical machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101588092B (en) | 2012-10-10 |
| JP5130321B2 (en) | 2013-01-30 |
| JP2010166816A (en) | 2010-07-29 |
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