JP2006340488A - Rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a rotating electric machine that can reduce a lubrication current between conductor strands generated by leakage magnetic flux at the end of a stator without changing a dislocation angle and a dislocation pitch of an armature winding from those of a conventional technology. <P>SOLUTION: The rotating electric machine comprises the armature winding housed in a winding slot and constituted of multiple laminated strand conductors, and the strand conductor is formed so as to be displaced by continuously being twisted toward the extension direction of the winding slot at a part housed in the winding slot, the strand conductors are short-circuited at both sides of the armature winding that is protruded outside from both sides of a stator core, and the displacement angle of the part housed in the slot of the strand conductor is generally in a range of 360+360n° to 450+360n° (n is an integer of 0 or larger). A sub-core that is larger in the average magnetic body lamination factor of the stator core than that of the other part is formed in a range where the displacement angle of the strand conductor is 90+360n to 270+360n (n is an integer of 0 or larger) with both the sides as references. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine in which a dislocation portion is formed in a wire conductor of an armature winding housed in a winding slot of a stator core.

  In the conventional rotating electric machine, as shown in the sectional view of the rotating armature of FIG. 24, a stator core provided with a plurality of winding slots 10 extending along the rotation axis of the rotor (not shown). 3, an armature winding 2 composed of an upper coil 2 c and a lower coil 2 d each composed of a plurality of wire conductors 5 embedded and stacked in the winding slot 10, and a plurality of radial coils in the stator core 3. The wire conductor 5 is a portion housed in the winding slot 10 and is continuously twisted in the extending direction of the winding slot 10, typically 360. The wire conductors 5 are short-circuited at both side portions of the armature winding 2 that are formed so as to be dislocated and project outward from both side surfaces of the stator core 3.

  When an alternating current flows through the multiple strand conductor having such a configuration, a leakage magnetic flux that crosses the winding slot 10 in the circumferential direction is generated, and thereby the strand conductor 5 in each longitudinal portion of the multiple strand conductor. A voltage is induced during If an extremely large difference occurs in the induced voltage of each strand conductor over the entire length of the winding conductor in any strand conductor pair, a large circulating current, that is, the strand conductor pair, is generated in the closed loop strand conductor pair. The current flowing through the current flows, current loss increases and heat generated inside the wire conductor also increases.

  Therefore, in order to prevent the circulating current from flowing by making the voltages induced between the strand conductors substantially equal over the entire length of the strand conductors, the strand conductors are transposed by various methods.

  Here, with reference to FIGS. 25 to 27, the dislocation of the wire conductor, which is a conventional technique, will be described. This dislocation of the wire conductor is a device in which the position of each wire conductor is changed sequentially by twisting the wire conductor toward the extending direction of the winding slot. Considering that the conductor moves in a circle around the center of the cross section, the degree of dislocation is expressed by the angle of rotation. The dislocation where each strand conductor goes to the same position as the starting position at the opposite end of the winding slot through all positions in the section of the strand conductor is called 360-degree dislocation. This dislocation is called 720-degree dislocation.

  FIG. 25 is a schematic diagram showing the configuration of a strand of 360 ° dislocation, and the stator core 3 provided with a plurality of winding slots extending along the rotation axis of the rotor (not shown), and the winding The armature winding 2 is composed of a large number of strand conductors 5 embedded and stacked in the wire slot, and a plurality of ventilation ducts 4 in the radial direction in the stator core. An armature winding that is formed in a portion housed in the winding slot so as to be continuously twisted in the extending direction of the winding slot to shift 360 degrees and protrudes outward from both side surfaces of the stator core 3. The strand conductor 5 is short-circuited on both sides of the wire 2.

  FIG. 25 shows the magnetic flux interlinking between two typical wire conductors 5a and 5b. In the figure, the interlinkage magnetic flux of the iron core portion is shown as 16a to 16c. The sum is equal to 16b, and the induced voltage between the wire conductors 5a and 5b due to the magnetic flux interlinking in the winding slot is offset.

  However, although a 360-degree dislocation is performed in the winding slot but is not dislocated outside the winding slot, an unbalanced voltage is generated by the leakage magnetic fluxes 16x and 16y on the end side of the rotating electrical machine, and the wire Circulating current is generated in the conductors 5a and 5b.

  As described above, since there is a leakage magnetic flux at the end of such a rotating electrical machine, a voltage is induced at the end of the winding conductor, and a circulating current flows in the strand conductor to generate a current loss. In order to reduce this loss, the positions of the wire conductors at both ends of the wire conductor are reversed, and the directions of the voltages induced at both ends of the same wire conductor are reversed to cancel each other. Good. This can be realized by performing a 540-degree dislocation within the winding slot, that is, a one-half rotation.

  FIG. 26 is a schematic diagram showing a strand configuration of 540-degree dislocation. The same components as those in FIG.

  In FIG. 26, the dislocation pitch is a half of the central portion within a range of 1/4 Ls of the iron core length Ls from both ends, that is, a range of a quarter of the iron core length from both ends and a half of the iron core length of the center portion. Within these ranges, 180 degree dislocations are made. Since the sum of the interlinkage magnetic fluxes 16a and 16e between the strand conductors 5a and 5b is equal to 16c, and the sum of 16b and 16f is equal to 16d, the interlinkage flux in the winding slot is induced between the strands 5a and 5b. The voltage is offset. Further, since the magnetic fluxes interlinking 16x and 16y cancel each other outside the winding slot, the circulating current due to the leakage magnetic flux at the end can also be reduced.

  FIG. 27 is a schematic diagram showing the configuration of a 450-degree dislocation strand. The same components as those in FIG.

  In FIG. 27, the dislocation pitch is a half of the central portion within a range of 1/8 Ls of the core length Ls from both ends, that is, a range of 1/8 of the core length from both ends and 3/4 of the core length of the center portion. Within these ranges, the dislocations are 180 degrees and 270 degrees, respectively. Since the sum of the interlinkage magnetic fluxes 16a, 16b, 16d, and 16e between the strand conductors 5a and 5b is equal to 16c, the induced voltage between the strands 5a and 5b is canceled by the interlinkage magnetic flux in the winding slot. Further, outside the winding slot, the sum of the magnetic fluxes linked to 16x and 16y is smaller than the 360 ° dislocation, and the circulating current due to the leakage flux at the end can be reduced as compared to the 360 ° dislocation.

  The same effect can be obtained even when the above-mentioned strand dislocation angles are dislocation angles obtained by adding n to an integer and 360 n degrees, respectively.

  On the other hand, in order to cancel the leakage flux on the end side as shown in FIG. 25, as shown in Non-Patent Document 1 and Patent Documents 1 and 2, a device is applied, and the induced voltage due to the leakage flux at the end is reduced. This is a method of reducing the generated circulating current loss. Of these, Patent Document 1 is provided with a portion that is not dislocated, Non-Patent Document 1 is that the dislocation angle is reduced from 360 degrees, and Patent Document 2 is a dislocation gradient in the case of 450 degrees dislocation. The position to change is changed.

  Patent Document 3 is a problem in Patent Document 1, that is, when the number of dislocations of the wire conductor is large or when the winding slot axial length is short, the dislocation pitch is further shortened and the wire conductor is short-circuited. In order to improve the problem, the invention is as follows. That is, the wire conductors of the armature winding are continuously twisted in the extending direction of the winding slot except for both end portions of the armature winding protruding outward from both side surfaces of the stator core 3. The wire conductors formed so as to have different thicknesses in the stacking direction occupy the wire conductors arranged in the radial direction from the rotation center of the rotor at the both end portions with the thicker one closer to the rotor. The rotating electrical machine is arranged as described above. According to Patent Document 3, by configuring in this way, the resistance value of the wire conductor is reduced, current generation loss can be reduced, and no dislocation is provided unlike the prior art, so it is necessary to shorten the dislocation pitch. As a result, the circulating current loss can be reduced, and local heating of the armature winding can be suppressed.

  Patent Document 4 is a winding bar that is short-circuited at the end of the stator core, and the conductor bar that is the winding bar is composed of a number of conductor wires that are electrically insulated from each other. The wire conductor is a type of winding bar in which the conductor conductors are transposed based on the rable principle and the conductor strands in both end clip sections and the conductor strands in the active part section are transposed together. By configuring as above, the loop current can be further suppressed, and the temperature gradient pattern in the conductor bar can be further flattened.

  Patent Documents 1 to 4 and Non-Patent Document 1 described above all improve the stator winding itself, and do not improve the stator core like the present invention.

  Next, the cooling gas ventilation path in the machine will be described with reference to FIG. FIG. 28 is a basic configuration example of a cooling gas ventilation path in a rotating electrical machine such as a turbine generator.

  The stator iron core of the rotating electrical machine is formed by laminating iron core punches and inserting inner spacing pieces at a predetermined interval to form a radial ventilation duct 4. The ventilation duct 4 is divided into one or more sections in the axial direction, and is divided into an air supply section that flows from the outer diameter of the iron core to the inner diameter side and an exhaust section that flows from the inner diameter to the outer diameter side. FIG. 28 shows a configuration example in which the stator core 3 is divided into two supply sections 4a and three exhaust sections 4b, and individual ventilation ducts 4 are omitted.

  The cooling gas is discharged from the rotor fan 11 attached to both ends of the rotor, and branches in three directions: the rotor 1, the air gap 19, and the armature winding end 2b.

  The cooling gas is supplied to the stator from a ventilation path that flows directly from the fan 11 into the air gap 19, and the cooling gas after cooling the armature winding end 2 b is guided to the air supply section 4 a of the stator core 3. Do.

  The cooling gas supplied to the air supply section 4 a flows through the ventilation duct 4 group from the outer diameter side to the inner diameter side, cools the stator core 3 and the armature winding 2, and then is discharged to the air gap 19. In the air gap portion 19, the exhaust gas from the rotor 1 and the cooling gas flowing directly into the air gap from the fan 11 are merged, and further, the exhaust section 4 b flows from the inner diameter side to the outer diameter side. The child winding 2 is cooled and merged on the outer diameter side of the stator. The cooling gas that has become a high temperature by cooling the stator and the rotor passes through the water-cooled gas cooler 12, is cooled, and circulates again to the rotor fan 11 through the air guide.

  Armature windings and field windings are strictly limited by the heat resistance performance of the insulators that make them, and in the design of rotating electrical machines, these temperatures are designed to be kept below the standard value. There is a need to.

  In order to efficiently cool the armature winding, it is desirable to level the winding temperature by supplying a small amount of cooling gas to a high portion where the winding temperature is low and intensively supplying it to the high portion.

  As one of means for adjusting the supply amount of the cooling gas, there is a method of arranging stator core ducts at unequal pitches in the axial direction. In the general structure of a turbine generator, the cooling gas flowing into the air gap from the end of the stator is supplied directly from the fan, so the gas temperature is lower than other parts and is advantageous for cooling. For this reason, for example, as shown in FIG. 29, the pitch of the ventilation duct 4 on the iron core end side may be increased as compared with other parts.

If the axial space factor of the magnetic material of the stator core is not uniform, the balance of the induced voltage between the strands of the armature winding is lost, and a current circulating between the strands is generated, resulting in an increase in loss. Patent Document 3 describes a method for reducing the circulating current loss that occurs when the arrangement of the ventilation ducts 4 is not uniform in the axial direction. However, the circulating current that causes an induced voltage due to leakage magnetic flux at the end is described. It is not intended to reduce losses.
Japanese Patent Publication No.58-14141 US6703752 B2 JP-A-9-182339 JP 2002-78265 A Xu Shanchun, et al, “A New Transposition Technique of Stator Bars of The Hydrogenerator”, Proceedings of International Symposium on Salient-Pole Machines With Particular Reference to Large Hydro-Electric Generators and Synchronous Motors, (pp.384-389), Oct . 1993

  In the above-described prior art, when the dislocation angle of the strand conductor is larger than 360 degrees or when a portion where no dislocation is provided in the winding slot, the dislocation pitch is shortened and the thin insulation of the strand conductor is damaged. However, there was a possibility of causing a short circuit of the wire conductor. In particular, when the number of dislocations of the strand conductor is large or when the winding slot axial length is short, the dislocation pitch is further shortened, and the possibility that the strand conductor is short-circuited increases.

  The present invention has been made to solve the above-described problem, and without changing the dislocation angle and dislocation pitch of the armature winding from the prior art, between conductor wires due to leakage magnetic flux at the end of the stator. It is an object of the present invention to provide a rotating electrical machine that can reduce circulating current and suppress increase in loss of armature winding and local overheating.

In order to achieve the object, the invention corresponding to claim 1 is:
A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is in a range of approximately 360 + 360 n degrees to 450 + 360 n degrees (n is an integer of 0 or more)
The average magnetic space factor of the stator core is within a range where the dislocation angle of the wire conductor is 90 + 360n degrees to 270 + 360n degrees (n is an integer of 0 or more) with both ends as the base points. The rotating electrical machine is characterized in that a sub iron core portion larger than the portion is formed.

  According to the present invention, the circulating current between the conductor wires due to the leakage magnetic flux at the end of the stator can be reduced without changing the dislocation angle and the dislocation pitch of the armature winding from the prior art. A rotating electrical machine that can suppress an increase in loss and local overheating can be provided.

  Hereinafter, embodiments of a rotating electrical machine according to the present invention will be described with reference to the drawings.

(First embodiment)
The outline of the present invention will be described with reference to FIG. FIG. 1 shows a rotor 1, a stator core 3 provided with a plurality of winding slots extending along the rotation axis of the rotor, and a large number of wire conductors embedded in and stacked in the winding slots. In the rotating electrical machine composed of the upper coil 2c composed of 5 and the armature winding 2 composed of the lower coil 2d and a plurality of ventilation ducts 4 in the radial direction in the stator core 3, the construction is as follows. Is.

  The strand conductor 5 is a portion housed in the winding slot, and is formed so as to be continuously twisted and displaced in the extending direction of the winding slot, and outside the both side surfaces of the stator core 3. In the protruding end winding 2b (end of the armature winding), the strand conductor is short-circuited, and the dislocation angle of the portion housed in the slot of the strand conductor is approximately in the range of 360 + 360n degrees to 450 + 360n degrees (n The sub-core portion 14 is formed within a range in which the dislocation angle of the wire conductor is 90 + 360n degrees to 270 + 360n degrees (n is an integer equal to or greater than 0) with both ends as base points. The sub iron core portion 14 has an average magnetic material space factor larger than that of the non-sub iron core portion other than the sub iron core portion.

  Here, the magnetic body space factor is the ratio of the magnetic body portion to the entire iron core, and the magnetic body portion here is the insulator formed on the surface of the iron plate that is formed by stacking the air duct 4 and the iron core. This refers to the part that contributes to the magnetic resistance against leakage magnetic flux in the winding slot by a magnetic material such as an iron core excluding the above. If structures other than the stator core 3 are configured uniformly, it may be called the core space factor.

  In the embodiment configured as described above, during load operation, current flows through the armature winding, and current flows through each of the wire conductors. FIG. 1 shows the magnetic flux interlinking between two typical wire conductors 5a and 5b, and the interlinkage magnetic flux of the iron core portion is shown as 16a to 16c. For example, the sum of 16a and 16c and 16b Since the interlinkage area is the same, if the magnetic space factor of the part is the same, the unbalanced voltage due to the interlinkage magnetic flux in this part is canceled out. However, since the interlinkage magnetic fluxes 16x and 16y at the ends are strengthened without being canceled, an unbalanced voltage is generated between the strands due to the difference in the interlinkage magnetic flux at this portion.

  In this embodiment, since the magnetic body space factor of the sub iron core part 14 is larger than the other stator core 3 parts, the flux linkage 16b is larger than when the magnetic body space factor is uniform, It works to cancel the interlinkage magnetic fluxes 16x and 16y at the ends. As a result, the unbalanced voltage is reduced and the occurrence of circulating current loss can be suppressed.

  According to the present embodiment, the unbalanced voltage is reduced in the whole core conductor of the iron core portion, the generation of circulating current can be suppressed, and the circulating current loss can be reduced, so that the loss in the strand conductor is reduced. The loss distribution between the wire conductors can be reduced, and the local heating of the armature winding conductor can be suppressed.

  What has been described above is the outline of the present invention. Specifically, FIG. 1 shows a wire conductor in a rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 360 degrees. The sub-core portion is formed within a range corresponding to approximately 135 degrees to 225 degrees with the dislocation angle of both ends as the base points, and the sub-core portion is more than the non-sub-core portion other than the sub-core portion. The case where the average magnetic substance space factor is enlarged is shown.

  In other words, FIG. 1 can be said to have the following configuration. That is, in the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 360 degrees, the axial length of the stator core 3 is approximately the entire length in the axial direction with the both ends of the stator core 3 as the starting point. A sub-core part 14 is formed within a range of a quarter length to a quarter of a length, and the sub-core part 14 is more average than a non-sub-core part other than the sub-core part. This is a larger magnetic space factor.

  The sub-core part 14 of the present embodiment in FIG. 1 is, for example, as shown in FIG. 2, the difference in magnetic space factor, the mutual pitch of the ventilation duct 4, that is, the sub-core unit constituting the sub-core part 14. The thickness of the magnetic iron plate is made thinner than the thickness of the non-sub iron core unit constituting the non-sub iron core. In this case, the magnetic iron plates of the non-sub iron core unit and the sub iron core unit have the same thickness.

  FIG. 3 is a diagram for explaining the ventilation structure of the rotating electric machine of FIG. 1, and shows the basic configuration of the cooling gas ventilation path in the present embodiment in the lower half of the drawing, and the sub-iron core portion in the upper half of the drawing. 14 configurations are shown. FIG. 3 shows an air supply section 4 a that divides the stator core portion into a plurality of cooling spaces in the axial direction and blows air from the outer peripheral side to the inner peripheral side of the stator core 3 through the ventilation duct 4, and the stator core 3. The exhaust sections 4b that are discharged from the inner peripheral side to the outer peripheral side through the ventilation duct 4 are alternately arranged in the axial direction, and include a sub iron core part 14 having a larger magnetic space factor than the other parts. A gas section 4b is provided.

  FIG. 3 shows that the dislocation angle of the portion housed in the slot of the wire conductor is in the range of approximately 360 to 450 degrees, and the number of ventilation sections is 4m-1 where m is an integer of 1 or more. The portion is arranged in the air supply section 4b at the axially central portion of the stator core.

  Specifically, FIG. 3 shows that the stator core 3 is divided into three air supply sections 4a and four exhaust sections 4b, and the axial direction of the ventilation duct 4 included in the stator core 3 rather than other parts. The sub iron core portion 14 having a large pitch is provided in the air supply section in the central portion in the axial direction.

  In the air supply section 4a to which a low-temperature gas temperature cooled by a cooler (not shown) is supplied, the winding temperature is usually relatively low. However, in this embodiment, the air supply section in the central portion where the winding temperature is relatively low. Since the pitch in the axial direction of the ventilation duct 4 included in the stator core 3 at the portion 4a is large, the air volume in this portion is suppressed, and the temperature distribution of the armature winding in the axial direction is leveled. Yes.

  Such an effect is effective when the axially central portion of the stator core 3 is an air supply section, and the number of ventilation sections is 4m−1 where m is an integer equal to or greater than 1, that is, 3, 7, In the case of a number such as 11, it is possible to provide a rotating electric machine that can suppress the circulating current loss and can cool the stator and the armature winding more favorably.

  A modification of the first embodiment will be described with reference to FIGS. In FIG. 4, the strand conductors constituting the armature winding 2 are displaced 450 degrees, and the dislocation pitch is halved in the range of 1/8 of the iron core length at both axial ends of the stator core 3. ing. At the same time, the space factor of the magnetic body of the stator core 3 is larger in the sub-core part 14 in the central part in the axial direction than in the other stator cores 3. In the lower side of the figure, the dislocation angle corresponding to each part of the stator core 3 is shown, but the sub iron core portion 14 is within the range of 90 ° in the axial center portion.

  Specifically, FIG. 4 shows that in a rotating electrical machine in which the dislocation angle of the portion of the wire conductor housed in the slot is approximately 450 degrees, the dislocation angle of the wire conductor is approximately 190 degrees from both ends. The sub iron core portion 14 is formed within a range corresponding to 260 degrees, and the sub iron core portion has an average magnetic material space factor larger than that of the non-sub iron core portion other than the sub iron core portion.

4 is changed, in the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 450 degrees, the axis of the stator core 3 is defined with the both ends of the stator core 3 as the base points. The sub-core part 14 is formed within a range of approximately two-fifths to approximately three-fifths of the total length in the direction, and the sub-core part 14 is a part other than the sub-core part. It can be said that the average magnetic space factor is larger than that of the non-sub iron core.

  Since it is a structure like FIG. 4, the flux linkage between strand 5a, 5b is strengthened in 16d. When the magnetic material space factor of the stator core 3 is uniform, the sum of the interlinkage magnetic fluxes 16a, 16b, 16f, 16g and the sum of the 16c, 16d, 16e are substantially equal. Although they cancel each other, the interlinkage magnetic fluxes 16x and 16y at the ends remain without being canceled. Here, the interlinkage magnetic flux 16d has an opposite phase to the sum of the interlinkage magnetic fluxes 16x and 16y at the end, functions to cancel the induced voltage, and can suppress the occurrence of circulating current loss between the strands.

  FIG. 5 shows a second modification of the first embodiment according to the present invention. In FIG. 5, the wire conductors constituting the armature winding 2 are displaced by 720 degrees. The magnetic body space factor of the stator core 3 is larger in the sub-core portion 14 than in the other stator core 3 portions. The dislocation angle corresponding to each part of the stator core 3 is shown on the lower side of the figure, but the sub-core part 14 has a range of 90 to 270 degrees from one end and 450 degrees (that is, 90 + 360 degrees). It is within the range of 630 degrees (that is, 270 + 360 degrees), and is within the range of the same dislocation angle when viewed from the opposite end.

  5, specifically, in a rotating electrical machine in which the dislocation angle of the portion housed in the slot of the strand conductor is approximately 720 degrees, the dislocation angle of the strand conductor is approximately 135 degrees to 225 based on one end portion. Each of the sub-cores is formed in a range corresponding to degrees and a range in which the dislocation angle of the wire conductor is approximately 135 degrees to 225 degrees from the other end. The portion has a larger average magnetic space factor than non-sub-core portions other than the sub-core portion.

  In other words, in the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the strand conductor is approximately 720 degrees, the axial direction of the stator core 3 is based on both ends of the stator core 3. Each of the sub-core parts 14 is formed within a range of approximately 3 / 16th to approximately 5 / 16th of the total length, and the sub-core part 14 is formed of a part other than the sub-core part. It can be said that the average magnetic space factor is larger than that of the non-sub iron core.

  In the case of FIG. 5, the interlinkage magnetic flux between the strands 5a and 5b is strengthened by 16b and 16d, and these are in opposite phase to the sum of the interlinkage magnetic fluxes 16x and 16y, so that the induced voltage is canceled out. It can suppress the generation of circulating current loss between the wires.

  In the embodiment shown in FIG. 1 and the modifications shown in FIGS. 4 and 5 described so far, the dislocation angle of the strand conductor is 360 + 360 n degrees or 450 + 360 n degrees, and the dislocation angle of the strand conductor is 90 + 360 n from both ends. It can be said that the sub iron core portion 14 is provided within a range of 270 + 360n degrees (n is an integer of 0 or more).

  According to the present embodiment, the same effect is obtained when the interlinkage magnetic flux of the sub iron core portion 14 is in the opposite phase to the sum of the interlinkage magnetic flux at the end, so that the dislocation angle is an intermediate between 360 degrees and 450 degrees. Even in the case of this angle, the occurrence of circulating current loss can be suppressed by the same configuration.

  Further, as described in Non-Patent Document 1 and Patent Document 3, in order to reduce the circulating current loss due to the unbalance voltage caused by the leakage magnetic flux generated in the end portion and the slot, the dislocation angle is set to be more than 360 degrees. There is also a way to make it smaller. The angle is determined so that the induced voltage due to the leakage flux generated at the edge and the induced voltage due to the change of the dislocation angle are offset, but the induced voltage varies depending on the magnitude of the leakage flux generated at the edge. Currently, it is generally calculated by means such as numerical calculation, and is generally selected in the range of 320 to 350 degrees. A combination of this method and the circulating current loss reduction method using the sub-core part 14 according to the present invention is also considered as an obvious application example. In this case, the dislocation angle and the magnetic material occupation of the sub iron core portion 14 are canceled so that the sum of the induced voltage due to the leakage magnetic flux, the induced voltage due to the change of the dislocation angle, and the induced voltage due to the sub iron core portion 14 of the present invention is canceled out. It is necessary to determine the moment. For example, in the case where the induced voltage due to the sub iron core portion is not taken into account and the dislocation angle for canceling the induced voltage caused by the end leakage magnetic flux is 340 degrees, the dislocation angle is set to 350 degrees, and the remaining 10 degrees of induction is induced. The voltage is obtained by changing the magnetic space factor of the sub iron core.

  On the other hand, a third modification of the first embodiment according to the present invention will be described with reference to FIG. FIG. 6 shows the structure of the sub iron core part 14 and the ventilation duct 4 in the vicinity of the stator end part. The magnetic material space factor in the sub iron core part 14 is configured to be larger than the magnetic material space factor of the non-sub iron core part. Specifically, the width of the ventilation duct 4 in the sub iron core portion 14 is narrow. Since the structure as shown in FIG. 6 can be laminated without increasing the thickness of the iron core portion between the ventilation ducts 4, the iron core can be efficiently cooled, and the iron core block between the ventilation ducts 4 is preliminarily provided. In the case of the configuration, it is only necessary to prepare an iron core block having the same configuration, so that it is easy to assemble the iron core.

  A modification 4 of the first embodiment according to the present invention will be described with reference to FIGS. FIG. 7 shows the configuration of the sub-core part 14 and the ventilation duct 4 of the stator core 3, and FIG. 8 shows an enlarged view of the sub-core part 14 of FIG. As shown in FIG. 8, the stator iron core 3 is generally formed by providing an insulating film such as an insulating varnish on the surface of a magnetic material that is a punched steel plate. It consists of the difference in the ratio of the thickness of the magnetic material and insulating film of the punched steel plate that constitutes the iron core 3, for example, the sub iron core portion 14 uses a 0.5 mm thick punched steel plate, and the non-sub iron core portion is A 0.35 mm thick punched iron plate is used.

  If the rotary electric machine having the configuration as shown in FIGS. 7 to 8 is used, the sub iron core portion 14 can be formed without changing the configuration of the ventilation duct 4, so that the degree of freedom in ventilation design is increased and more efficient ventilation is possible. At the same time, if the thickness of the insulating film is kept constant, the portion with a small magnetic space factor will be composed of a thinner punched plate, and eddy current loss due to the in-plane magnetic flux of this portion Can be made relatively small, so that temperature rise can be suppressed.

  Next, Modification 5 of the first embodiment according to the present invention will be described with reference to FIG. FIG. 9 shows a configuration of the sub iron core portion 14 of the stator iron core 3 and the ventilation duct 4. The inner spacing pieces for forming the ventilation duct 4 of the stator core 3 are usually attached in advance to the spacing piece mounting plate 9 having the same shape as the punched steel plate, and are inserted at predetermined intervals when the stator core 3 is assembled. . In FIG. 9, the magnetic permeability of the spacing piece mounting plate 9 is made higher in the sub iron core portion 14 than in the other portions. For example, the sub iron core portion 14 is a magnetic body, and the non-magnetic material is used in the other portions. It is realized by doing.

  If the rotating electrical machine has the configuration as shown in FIG. 9, the sub iron core portion 14 can be formed without changing the configuration of the ventilation duct 4 as in the above-described modification example 4. Therefore, the degree of freedom in ventilation design is increased. , More efficient ventilation is possible. Moreover, since the stator core 3 can be manufactured by the same procedure as that of the prior art except that the material of the spacing piece mounting plate 9 is changed, there is an advantage that the manufacturing process is not complicated.

(Second Embodiment)
Next, a second embodiment of the rotating electrical machine according to the present invention will be described with reference to FIGS. FIG. 10 shows the configuration of the sub iron core portion 14 and the ventilation duct 4 of the stator iron core 3. The inner spacing piece 8 for forming the ventilation duct 4 of the stator core 3 uses the magnetic inner spacing piece 8b in the central portion of the sub-core portion 14b at the center in the axial direction of the stator core 3. The non-sub iron core part other than the non-magnetic inner spacing piece 8a is used.

  FIG. 11 shows a magnetic flux diagram of a leakage magnetic flux generated by a current flowing through the armature winding 2 together with a cross-sectional view perpendicular to the axis in the ventilation duct 4. In FIG. 11, a magnetic inner spacing piece 8 c is added to the outer diameter side (lower side in the figure) of the armature winding 2 so as to be substantially parallel (circumferential direction) to the side of the slot bottom.

  Because of such a structure, the magnetic resistance around the winding is reduced in the ventilation duct 4 part. As shown in FIG. 24, the iron core portion in which the winding is housed in the slot becomes a magnetic path via the iron core, but the magnetic spacing piece is also present in the ventilation duct 4 portion as shown in FIG. Since it becomes a magnetic path, in the sub iron core part 14, the number of linkage of the magnetic flux to a coil | winding increases.

  That is, as in the first embodiment, the increase in the interlinkage magnetic flux between the strand conductors in the sub iron core portion 14 works to cancel the interlinkage flux between the strand conductors due to the leakage flux at the end portion. The unbalanced voltage is reduced, and the occurrence of circulating current loss between the strands can be suppressed.

  In the present embodiment, the interlinkage magnetic flux between the strands of the sub iron core portion 14 can be increased without changing the width of the iron core block between the ventilation ducts 4, so that the arrangement of the ventilation duct 4 is not restricted, Ventilation path can be configured.

  Next, a modification of the second embodiment of the present invention will be described with reference to FIGS. 12 and 13 (a cross-sectional view taken along the line A-A ′ in FIG. 12). In FIG. 12, two inner spacing pieces 8 having a magnetic cross-section I-type oriented in the radial direction are provided on the tooth portion constituting the winding slot portion of the stator core 3. As described above, if the number of the magnetic inner spacing pieces 8 in the sub iron core portion 14 in the central portion in the axial direction is increased, the magnetic resistance of the ventilation duct 4 portion is reduced. This increases the interlinkage magnetic flux, cancels the interlinkage magnetic flux between the strand conductors due to the leakage magnetic flux at the end, and suppresses the occurrence of circulating current loss between the strands.

  Further, even if the circumferential width W of the magnetic inner spacing piece 8 is increased, the same effect can be obtained because the magnetic resistance of the ventilation duct 4 can be reduced.

(Third embodiment)
Next, a third embodiment of the rotating electrical machine according to the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view perpendicular to the axis of the ventilation duct 4 in the sub iron core portion 14 provided at the axially central portion of the stator iron core 3 in FIG. 1. In FIG. 14, a magnetic body 21 is provided around the winding. Normally, in the core slot portion, a structural material called a ripple spring is inserted to fix the winding, but a magnetic plate may be inserted instead. Alternatively, the structure of the iron core slot portion may be left as it is, and only in the ventilation duct 4 portion, the magnetic plate 21 may be installed around the winding and tied with tape or the like to fix the magnetic plate.

  Further, as shown in Modification 1 of the third embodiment in FIG. 15, a magnetic plate 21 having a shape close to the winding slot, for example, a U-shaped cross section, may be prepared and installed in the ventilation duct 4 part. .

  By adopting such a structure, the magnetic resistance around the winding in the ventilation duct 4 is reduced, the number of interlinkage magnetic flux between the winding strands is increased, and between the strand conductors due to the leakage flux at the end. Since it works so as to cancel the flux linkage, the unbalanced voltage is reduced and the occurrence of circulating current loss between the strands can be suppressed.

  Since the magnetic plate 21 is exposed to a high magnetic field, a high resistance material such as a ferrite material may be used to prevent heat generation due to eddy current.

  FIG. 16 shows a second modification of the third embodiment of the present invention, in which a magnetic tape 22 containing a magnetic material is wound around a winding instead of the magnetic plate 21. In order to increase the flux linkage between the wires, it is desirable to increase the magnetic resistance at the opening of the winding slot, so that the winding slot opening is non-magnetic (or has low permeability). As described above, it is preferable to configure a tape in which the magnetic portion is discontinuous in advance. For example, a material such as polyethylene naphthalate may be used for the magnetic part.

  Since it is such a structure, the number of flux linkages between the winding strands of the sub iron core part 14 can be increased more easily. Normally, a conductive corona prevention treatment is applied around the winding to prevent corona discharge. However, the corona prevention treatment can also be performed on the outer side of the magnetic tape, so that the winding is sound. Can keep.

(Fourth embodiment)
Next, a fourth embodiment of the rotating electrical machine according to the present invention will be described with reference to FIG. In FIG. 17, the armature winding 2 has the strands shifted by 360 degrees, and the stator core 33 is divided into two supply sections 4 a and three exhaust sections 4 b as in FIG. 28. A sub iron core portion 14 having a larger space factor of the magnetic material by increasing the pitch of the ventilation duct 4 than the other portions is provided in the air supply section 4a adjacent to the central exhaust section 4b. The sub-core part 14 is within ¼ on both sides from the center in the axial direction of the stator core 3, that is, in a region having a length of ½.

  In FIG. 17, the dislocation angle of the portion stored in the slot of the wire conductor is 360 degrees, the number of ventilation sections is 4m + 1 where m is an integer equal to or greater than 1, and the sub-core portion 14 is fixed to the stator core 3. In the air supply section 4a adjacent to the central portion in the axial direction, and the dislocation angle of the wire conductor is arranged within a range of 90 degrees from the central portion in the axial direction.

  Specifically, the stator core 3 is divided into two air supply sections 4a and three exhaust sections 4b, and the axial pitch of the ventilation duct 4 in the stator core 3 is larger than the other parts. The iron core part 14 is provided in the air supply section in the central part in the axial direction.

  In the air supply section 4a to which a low-temperature gas temperature cooled by a cooler (not shown) is supplied, the winding temperature is usually relatively low. However, in this embodiment, the air supply section in the central portion where the winding temperature is relatively low. Since the pitch in the axial direction of the ventilation duct 4 included in the stator core 3 at the portion 4a is large, the air volume in this portion is suppressed, and the temperature distribution of the armature winding in the axial direction is leveled. Yes.

  Such an effect is effective when the axially central portion of the stator core 3 is an air supply section, and the number of ventilation sections is 4m + 1 where m is an integer equal to or greater than 1, that is, 5, 9, 13, etc. In the case of the number, it is possible to provide a rotating electric machine that can suppress the circulating current loss and can cool the stator and the armature winding more favorably.

  Because of such a structure, the magnetic flux interlinking between the strands at the winding end and the magnetic flux interlinking between the strands in the sub-core portion 14 work so as to cancel each other, so that the sub-core portion 14 The magnetic flux strengthened by the magnetic material cancels out the unbalanced voltage due to the end leakage magnetic flux, and the circulating current loss can be reduced. Furthermore, since the sub iron core portion 14 is disposed in the air supply section with relatively good cooling conditions, the temperature distribution in the axial direction of the armature winding is increased even if the pitch of the ventilation duct 4 is increased to make it difficult for the refrigerant to flow. Since it works to make it uniform, the risk of local overheating is reduced.

(Fifth embodiment)
Next, a fifth embodiment of the rotating electrical machine according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part same as the 1st-4th embodiment mentioned above, and the overlapping description is abbreviate | omitted. In the fifth embodiment, the strand conductors constituting the armature winding 2 in FIG. 4 are displaced by 360 degrees, and the sub-core in a range of ¼ or less of the core length at both axial ends of the stator core 3. The pitch of the ventilation duct 4 is made small by the part 14, ie, the magnetic body space factor is smaller than the non-sub iron core part.

  Specifically, in the rotating electrical machine in which the dislocation angle of the portion stored in the slot of the strand conductor is approximately 360 + 360 n degrees to 450 + 360 n degrees (n is an integer of 0 or more), the dislocation angle of the strand conductor is A member for increasing the magnetic resistance against the leakage flux in the circumferential direction is provided on the circumferential side surface of the armature winding within a range of 90 degrees from the end.

19 is changed, in the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 360 + 360n degrees to 450 + 360n degrees (n is an integer of 0 or more), the axial direction of the stator core On both sides of the stator core, within a range from the both axial end faces of the stator core to approximately one quarter of the axial total length of the stator core, respectively, on the circumferential side surface of the armature winding It can also be said that a member for increasing the magnetic resistance against the leakage flux in the circumferential direction is provided.

  In the present embodiment configured as described above, the absolute value of the sum of the interlinkage magnetic fluxes 16a and 16c is smaller than the absolute value of 16b, and therefore the chain due to the end leakage magnetic flux in the same direction as the interlinkage magnetic fluxes 16a and 16c. The alternating magnetic fluxes 16x and 16y are also offset by 16b, the unbalanced voltage due to the end leakage magnetic flux is reduced, and the occurrence of circulating current loss can be suppressed.

  FIG. 19 shows a modification of the fifth embodiment. In the sub iron core portion 14 provided at the end portion, the winding slot width Wt is reduced instead of reducing the ventilation duct pitch.

  With this configuration, the magnetic resistance at the winding slot is increased to reduce the number of flux linkages between the strands, and at the same time, the reduction in the tooth width is incident on the end of the stator core 3 in the axial direction. Since the eddy current loss caused by the magnetic flux to be generated can be reduced, it is possible to provide a healthy rotating electric machine with higher efficiency and less fear of overheating of the core end.

(Sixth embodiment)
FIGS. 20 and 21 show a sixth embodiment of the present embodiment, in which the magnetic resistance is increased in the sub-core portion 14 in a range equal to or less than ¼ of the core length at both axial ends of the stator core 3. A plate 23 is provided. When the magnetic shield plate 23 is made of a low resistance material such as copper, heat generation increases due to eddy currents induced in the conductor. Therefore, when a metal having an electrical resistivity of approximately 100 μΩcm or more, such as a NiCr material, is used, heat generation is performed. Can be small.

  With this configuration, the magnetic resistance at the winding slot can be increased to reduce the number of flux linkages between the strands, thereby suppressing the generation of circulating current between the strand conductors. Can do.

  22 and 23 show a first modification of the sixth embodiment, in which shield windings 24 are provided on the sub-core part 14 in a range equal to or less than ¼ of the iron core length at both axial ends of the stator iron core 3. Yes.

  With such a configuration, the magnetic resistance in the winding slot portion is increased to reduce the number of interlinkage magnetic fluxes between the strands, and at the same time, a voltage is induced in the shield winding. It is also possible to supply power to a part of the lighting.

  In addition, if these shield plates and shield windings are installed only on the upper coil (inner diameter side), the interlinkage magnetic flux between the strands is larger, the installation location of the shield plates and shield windings is reduced, The number of flux linkages can be reduced more efficiently.

(Modification)
The present invention can be variously modified without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, combined effects can be obtained. Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is extracted by omitting some constituent elements from all the constituent elements shown in the embodiment, when the extracted invention is implemented, the omitted part is appropriately supplemented by a well-known common technique. It is what is said.

  For example, FIG. 7 and FIG. 8 show that the stator core 3 has the ventilation duct 4, but the same effect can be obtained even in a small rotating electrical machine without the ventilation duct 4.

The basic block diagram which shows the rotary electric machine of 1st Embodiment which concerns on this invention. The basic block diagram which shows the stator core in 1st Embodiment which concerns on this invention. The basic block diagram which shows the ventilation structure of the rotary electric machine of 1st Embodiment which concerns on this invention. The basic block diagram which shows the stator in the modification 1 of 1st Embodiment which concerns on this invention. The basic block diagram which shows the stator in the modification 2 of 1st Embodiment which concerns on this invention. The basic block diagram which shows the stator core in the modification 3 of 1st Embodiment which concerns on this invention. The basic block diagram which shows the stator core in the modification 4 of 1st Embodiment which concerns on this invention. The basic block diagram which shows the punched-sheet iron core in the modification 4 of 1st Embodiment which concerns on this invention. The basic block diagram which shows the stator core in the modification 5 of the 3rd Embodiment which concerns on this invention. The basic block diagram which shows the stator core in 2nd Embodiment which concerns on this invention The basic block diagram which shows the armature winding sectional drawing and leakage magnetic flux in 2nd Embodiment which concerns on this invention. Sectional drawing of the stator core in the modification of 2nd Embodiment which concerns on this invention. Sectional drawing of the A-A 'part of FIG. 12 in the modification of 2nd Embodiment based on this invention. Sectional drawing of the stator core in 3rd Embodiment which concerns on this invention. Sectional drawing of the stator core in the modification 1 of the 3rd Embodiment which concerns on this invention. Sectional drawing of the stator core in the modification 1 of the 3rd Embodiment which concerns on this invention. The basic block diagram which shows the ventilation structure of the rotary electric machine of 4th Embodiment which concerns on this invention. The basic block diagram which shows the rotary electric machine of 5th Embodiment which concerns on this invention. Sectional drawing of the stator core in the modification of 5th Embodiment which concerns on this invention. Sectional drawing of the stator core in 6th Embodiment which concerns on this invention. The basic block diagram which shows the armature winding of 6th Embodiment which concerns on this invention. Sectional drawing of the stator core in 7th Embodiment which concerns on this invention. The basic block diagram which shows the armature winding of 7th Embodiment which concerns on this invention. FIG. 3 is a cross-sectional view of an armature winding of a rotating electric machine and a basic configuration diagram showing leakage flux. The basic block diagram which shows the conventional rotary electric machine. The basic block diagram which shows the conventional rotary electric machine (360 degree shift). The basic block diagram which shows the conventional rotary electric machine (540 degree shift). The basic block diagram (450 degree transposition) which shows the conventional rotary electric machine. The basic block diagram which shows the example of distribution of the ventilation duct pitch in the conventional rotary electric machine.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Rotor, 2c ... Upper coil, 2d ... Lower coil, 2 ... Armature winding, 2b ... Armature winding edge part, 2b ... End part winding, 22 ... Magnetic tape, 23 ... Magnetic shield board, 4 ... Ventilation duct, 4b ... Exhaust section, 4a ... Supply section, 4b ... Supply section, 5a, 5b, 5 ... Wire, 8 ... Inner spacing piece, 8b ... Inner spacing piece, 8a ... Inner spacing piece, 8c ... Inner spacing piece, 9 ... spacing piece mounting plate, 10 ... winding slot, 11 ... fan, 11 ... rotor fan, 12 ... water-cooled gas cooler, 14 ... sub iron core, 16x. 16y ... Magnetic flux, 16a ... Interlinkage magnetic flux, 16a. 16b ... Interlinkage magnetic flux, 16x. 16y ... Interlinkage magnetic flux, 16b ... Interlinkage magnetic flux, 16x ... Interlinkage magnetic flux, 16d ... Interlinkage magnetic flux, 19 ... Air gap, 19 ... Direct air gap, 19 ... Air gap portion, 21 ... Magnetic body, 21 ... Magnetic plate 24: Magnetic shield winding.

Claims (23)

A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is in a range of approximately 360 + 360 n degrees to 450 + 360 n degrees (n is an integer of 0 or more)
The sub-core portion is formed within a range in which the dislocation angle of the wire conductor is 90 + 360 n degrees to 270 + 360 n degrees (n is an integer of 0 or more) with both ends as base points. A rotating electrical machine characterized by having an average magnetic material space factor larger than that of a non-sub core part other than the iron core part. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 360 degrees,
A sub-core part is formed in a range where the dislocation angle of the wire conductor is approximately 135 degrees to 225 degrees with both ends as the base points, and the sub-core part is a non-sub core other than the sub-core part. A rotating electrical machine characterized by having an average magnetic material space factor larger than that of an iron core. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 360 degrees,
A sub-core part is formed within a range from about one quarter to about one-third of the axial length of the stator core with both ends of the stator core as a starting point. The rotating iron machine is characterized in that the sub iron core portion has a larger average magnetic material space factor than non-sub iron core portions other than the sub iron core portion. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 450 degrees,
A sub-core portion is formed in a range where the dislocation angle of the wire conductor is approximately 190 degrees to 260 degrees with respect to both end portions, and the sub-core portion is a non-sub core portion other than the sub-core portion. A rotating electrical machine characterized by having an average magnetic material space factor larger than that of an iron core. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 450 degrees,
A sub-core part is formed in a range from about two-fifths to about three-fifths of the total length in the axial direction of the stator core, starting from both ends of the stator core. The rotating iron machine is characterized in that the sub iron core portion has a larger average magnetic material space factor than non-sub iron core portions other than the sub iron core portion. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 720 degrees,
The dislocation angle of the wire conductor is within a range corresponding to approximately 135 degrees to 225 degrees with one end as a base point, and the dislocation angle of the wire conductor is approximately 135 degrees to 225 degrees with the other end portion as a base point. A rotating electrical machine characterized in that each sub-core portion is formed within a range to be processed, and the sub-core portion has a larger average magnetic space factor than non-sub-core portions other than the sub-core portion. . A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 720 degrees,
Sub-core portions are formed in a range of approximately 3 / 16th to approximately 5 / 16th of the length in the axial direction of the stator core, using both ends of the stator core as a base point. A rotating electric machine characterized in that the sub iron core portion has an average magnetic material space factor larger than that of a non-sub iron core portion other than the sub iron core portion. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 360 degrees,
A sub-core portion is formed within a range where the dislocation angle of the wire conductor is within 90 degrees from each end, and the sub-core portion is more average than non-sub-core portions other than the sub-core portion. A rotating electrical machine characterized by a reduced magnetic space factor. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotating shaft of the rotor, and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion housed in the slot of the wire conductor is approximately 360 degrees,
Sub-core portions are formed within a range of up to about a quarter of the axial total length of the stator core, with both end portions of the stator core as base points. An electric rotating machine characterized in that an average magnetic material space factor is made smaller than that of a non-sub iron core part other than the sub iron core part.    In the case where the stator core is provided with a plurality of ventilation ducts at desired positions in the axial direction and in the radial direction, the difference in the magnetic material space factor is determined by the pitch between the ventilation ducts or the ventilation duct. The rotating electrical machine according to any one of claims 1 to 9, wherein the rotating electrical machine has a thickness in the axial direction.   When the stator core is formed by laminating a plurality of magnetic plates, the difference in the space factor of the magnetic material is determined by the thickness of the plurality of magnetic plates constituting the stator core and the circumference of each magnetic plate. The rotating electrical machine according to any one of claims 1 to 9, wherein the rotating electrical machine is configured with a ratio of thicknesses of insulating films disposed on the rotating electrical machine.   The difference in the space factor of the magnetic material is configured by a difference in magnetic permeability between an inner spacing piece mounting plate installed in the ventilation duct of the stator core or an inner spacing piece installed in the ventilation duct. Item 10. The rotating electrical machine according to any one of Items 1 to 9.   2. The difference in the space factor of the magnetic material is configured by a difference in circumferential width of magnetic inner spacing pieces installed in the ventilation duct of the stator core or the number of magnetic inner spacing pieces. The rotary electric machine as described in any one of -9.   The rotating electrical machine according to claim 13, wherein the magnetic inner spacing piece has an I shape.   The magnetic inner space piece is installed on the outer diameter side of the winding slot so as to be substantially parallel to the side of the bottom of the winding slot, and the magnetic material space factor of the sub core is larger than that of the non-sub core. The rotating electrical machine according to any one of claims 1 to 9.   In the sub iron core part, with respect to the surface excluding the inner diameter side of the armature winding or the surface excluding at least the inner diameter side of the armature winding or the surface excluding the inner diameter side of the peripheral surface of the armature winding, The rotating electrical machine according to any one of claims 1 to 9, wherein a magnetic material made of any one of a plate material, a tape, and powder for increasing magnetic flux is installed. An air supply section that divides the stator core portion into a plurality of cooling spaces in the axial direction and blows air from the outer peripheral side of the stator core to the inner peripheral side through a ventilation duct, and from the inner peripheral side of the stator core Exhaust sections that are exhausted through the ventilation duct on the outer peripheral side are alternately arranged in the axial direction, and have an air supply section that includes the sub iron core portion in which the magnetic material space factor is larger than the other portions. The rotating electrical machine according to any one of claims 1 to 16, wherein   The dislocation angle of the portion stored in the slot of the wire conductor is in a range of approximately 360 to 450 degrees, and the number of the ventilation sections is 4m-1 where m is an integer equal to or greater than 1, and the sub iron core The rotating electrical machine according to claim 17, wherein the portion is arranged in an air supply section at an axially central portion of the stator core.   The number of the ventilation sections is 4m + 1, where m is an integer equal to or greater than 1, the sub-core portion is in the air supply section adjacent to the axial center of the stator core, and the dislocation angle of the strand conductor 18. The rotating electrical machine according to claim 17, wherein the rotating electric machine is disposed within a range of 90 degrees or less from an axially central portion.   The rotating electrical machine according to claim 8 or 9, wherein the difference in the magnetic material space factor is configured by reducing a tooth width of the stator core. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotation axis of the rotor and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion stored in the slot of the wire conductor is approximately 360 + 360 n degrees to 450 + 360 n degrees (n is an integer of 0 or more),
A member for increasing the magnetic resistance against circumferential leakage magnetic flux is provided on the circumferential side surface of the armature winding in a range where the dislocation angle of the strand conductor is within 90 degrees from each end. Rotating electric machine. A rotor whose rotation shaft is rotatably supported;
A stator core provided with a plurality of winding slots extending along the axis of the rotation axis of the rotor and provided with a plurality of ventilation ducts in the radial direction;
The armature winding is composed of a number of wire conductors stored and stacked in the winding slot, and the wire conductor is a portion stored in the winding slot, and the winding slot Is formed so as to be continuously twisted and dislocated in the extending direction of the armature winding, and the wire conductors are short-circuited at both side portions of the armature winding protruding outward from both side surfaces of the stator core, In the rotating electrical machine in which the dislocation angle of the portion stored in the slot of the wire conductor is approximately 360 + 360 n degrees to 450 + 360 n degrees (n is an integer of 0 or more),
The armatures are located at both ends in the axial direction of the stator core and within a range from both axial end surfaces of the stator core to approximately one quarter of the axial total length of the stator core. A rotating electrical machine, wherein a member for increasing a magnetic resistance against circumferential leakage magnetic flux is provided on a circumferential side surface of a winding.   The member for increasing the magnetic resistance is any one of a conductive shield plate and a shield winding, or a member for increasing the magnetic resistance is provided only on a side surface of the upper coil. The rotating electrical machine according to 22.

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