JP2003333790A - Rotor of salient pole electric rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor of a salient pole electric rotating machine in which the temperature difference is small in a salient pole coil, the maximum temperature is low, and the salient pole coil can be reduced in size while prolonging the lifetime. <P>SOLUTION: In the rotor of the salient pole electric rotating machine provided with a member 10 for retaining the side face of the salient pole coil 3 applied to a salient pole core 2, the coil retaining member 10 is provided with an axial through cut 11 or through hole in the vicinity of the contact face with the salient pole coil 3. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a salient pole type rotary electric machine, and more particularly to a rotor of a salient pole type rotary electric machine having improved cooling of a salient pole coil.

[0002]

2. Description of the Related Art As a conventional cooling structure for salient pole coils of a rotor of a salient-pole type rotary electric machine, those shown in FIGS. 12 and 13 are known. 12 and 13 show a main structure of a rotor of a conventional four-pole type salient-pole type rotary electric machine. FIG. 12 is a partial sectional view, and FIG. 13 is a perspective view of a portion B of FIG.

In FIGS. 12 and 13, 1 is a rotor, 2 is a salient pole core, 3 is a salient pole coil, 4 is a pole shoe, 5 is an insulating collar, 6 is a holding bolt, 7 is a coil holding member, and 8 is an implant. Bolts and 9 are tightening nuts. The salient magnetic pole coil 3 is attached to the head and the bottom of the salient magnetic pole iron core 2 via insulating collars 5, respectively, and is pressed by tightening the magnetic pole shoes 4 with pressing bolts 6.

In the salient pole iron core 2 of each pole, a substantially rectangular parallelepiped coil conductor and a somewhat smaller and similar rectangular parallelepiped inter-conductor insulating material are alternately laminated and laminated to provide insulation between the two. The edgewise type salient magnetic pole coil 3 is attached with its end edge facing outward.

Since the rotor 1 of this salient pole type rotating electric machine rotates at a high speed, an extremely strong centrifugal force acts on the conductor of the salient pole coil 3 and the insulating material between the conductors. In order to prevent the coil conductor and the inter-conductor insulating material from moving or popping out by this centrifugal force, only two positions are shown in FIGS. 12 and 13, but the coil pressing member 7 is inserted through the stud 8. It is fixed to the base of the salient pole iron core 2 with a tightening nut 9. A plurality of coil pressing members 7 are arranged at predetermined intervals in the axial direction.

[0006]

In the rotor of the salient pole type rotary electric machine to which the coil pressing member 7 is attached as described above, both ends of the salient magnetic pole coil 3 in the axial direction and both ends of the magnetic pole are high speed and a large amount. Since it is cooled with cooling air, the temperature rise value is relatively low. However, since the coil pressing member 7 is present on the side surface of the salient pole coil 3 along the axial direction, the cooling air flowing into the central portion of the rotor is reduced, and further, in the rotating field, the coil surface on the rotating direction side between the magnetic poles. Since air does not flow so much and the heat transfer coefficient is small, the temperature rise in the coil central portion of this surface is large and the temperature difference in the salient magnetic pole coil 3 is also large.

Therefore, the present invention provides a rotor for a salient pole type rotating electric machine, which has a small temperature difference in the salient pole coil, a low maximum temperature, and can be made compact and have a long life. To aim.

[0008]

In order to achieve the above object, the invention of claim 1 is a rotor for a salient pole type rotary electric machine, comprising a coil pressing member for pressing the side surface of a salient magnetic pole coil mounted on a salient magnetic pole iron core. In the above, the coil pressing member has a notch or a hole penetrating in the axial direction in the vicinity of the contact surface with the salient magnetic pole coil.

According to the present invention, the cooling air flowing from the rotor end portion between the magnetic poles can flow into the central portion of the salient magnetic pole coil through the notch or the hole provided in the coil pressing member. The cooling property of the coil is improved.

According to a second aspect of the present invention, in the first aspect of the invention, the notch or the hole of the coil pressing member is formed only on the contact surface on the rotation direction side. According to the present invention, the cooling air can flow into the central portion of the salient magnetic pole coil through the salient magnetic pole coil surface on the rotational direction side where the heat transfer coefficient tends to be small, and especially the cooling performance of this coil surface is improved. .

According to a third aspect of the present invention, in a rotor of a salient pole type rotary electric machine including a coil pressing member for pressing a side surface of the salient magnetic pole coil mounted on the salient magnetic pole iron core, the coil pressing member and the salient magnetic pole coil are provided. A spacer having a notch or a hole penetrating in the axial direction is provided therebetween. According to this invention, the amount of cooling air flowing into the central portion of the rotor through the notches or holes provided in the spacer increases,
The heat transfer coefficient in this portion is improved.

According to a fourth aspect of the present invention, in the third aspect of the invention, the notch or hole penetrating in the axial direction is formed only in the spacer on the rotation direction side. According to the present invention, it is possible to improve the cooling property of the salient magnetic pole coil surface on the rotation direction side, which tends to be insufficiently cooled.

According to a fifth aspect of the invention, in the invention of the third aspect, the area of the notch or hole formed in the spacer on the rotation direction side is larger than the area of the notch or hole formed in the spacer on the counter rotation side. Will also be a large configuration. According to the present invention, it is possible to improve the cooling property of the salient magnetic pole coil surface on the rotation direction side, which tends to be insufficiently cooled.

According to a sixth aspect of the present invention, in the first to fifth aspects, a plurality of coil pressing members are provided in the axial direction, and the side surface of the salient magnetic pole coil and a predetermined space are provided between the plurality of coil pressing members. A rectifying body having surfaces facing each other is provided. According to the present invention, the cooling air flows along the space between the surface of the salient pole coil and the rectifying body, the heat transfer coefficient increases, and the salient pole coil can be efficiently cooled with a small air flow rate.

According to a seventh aspect of the present invention, the rectifying body is configured such that the cross-sectional shape in the direction orthogonal to the axis is triangular, trapezoidal or V-shaped. According to the present invention, the cooling air can efficiently flow along the surface of the salient pole coil by the rectifying body having a rational shape.

According to an eighth aspect of the present invention, the space between the rectifying body and the side surface of the salient magnetic pole coil is formed so as to become narrower toward the outer diameter. According to this invention,
A part of the cooling air that has passed through the notches or holes of the spacer flows along the space between the surface of the salient pole coil and the rectifying body, and the flow velocity increases toward the outer diameter side. Therefore, the heat transfer coefficient is increased, and the salient pole coil can be efficiently cooled with a small flow rate.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, some embodiments of a rotor of a salient pole type rotary electric machine according to the present invention will be described with reference to the drawings. Since the configuration other than the coil holding member and its periphery, which is the main part of the present invention, is the same as the conventional configuration, only the configuration of the coil holding member and its periphery will be described here. Moreover, FIGS.
Indicates a region corresponding to the B part in FIG. 12 of the conventional example.

1 and 2 show a coil pressing member 10 which is a main part of a rotor of a salient pole type rotary electric machine according to the first embodiment and the second embodiment, respectively. FIG. 1 shows a configuration in which a notch 11 penetrating in the axial direction is provided on two surfaces of the coil pressing member 10 that are in contact with the salient magnetic pole coils. According to this configuration, the cooling air flowing between the magnetic poles from the rotor end passes through the notch 11 provided in the coil pressing member 10,
It can flow into the center of the salient pole coil.

FIG. 2 shows a coil pressing member 10 which is a main part of a rotor of a salient pole type rotating electric machine of one rotation (constant rotation direction). A cutout 11 on the rotation direction side that axially penetrates the surface of the coil pressing member 10 that is in contact with the salient magnetic pole coil on the rotation direction R side.
This is a configuration in which a is provided. Although the heat transfer coefficient of the salient pole coil surface on the rotational direction side between the magnetic poles tends to be small, in the present embodiment, the rotational direction side notch that axially penetrates the portion of the coil pressing member 10 that contacts this surface. Since 11a is provided, the cooling air can flow into the central portion of the salient pole coil through this surface, which tends to have a low heat transfer coefficient.

3 to 6 show a coil pressing member 10 and a spacer, which are essential parts of a rotor of a salient pole type rotary electric machine according to the third to sixth embodiments of the present invention, respectively. 3, FIG. 4, and FIG. 6 show the case of one rotation (constant rotation direction). That is, the coil pressing member 10 is provided so as to be in contact with the salient magnetic pole coil 3 with the spacer 14 or 16 interposed therebetween.

In the embodiment shown in FIG. 3, a rotating direction side spacer 14 having a rotating direction side through hole 15 axially penetrated between the coil pressing member 10 and a salient magnetic pole coil on the rotating direction R side is provided. The structure is such that it is sandwiched and attached to the salient pole core. Although the heat transfer coefficient of the salient pole coil surface between the magnetic poles on the rotational direction R side is small, the spacer 14 on the rotational direction side in contact with this surface is in contact.
The through hole 15 is provided in the rotational direction, the amount of cooling air flowing into the central portion of the rotor is increased, and the heat transfer coefficient in this portion is improved.

In the embodiment shown in FIG. 4, a rotation direction side spacer 14 having a rotation direction through hole 15 penetrating the coil pressing member 10 in the axial direction is provided between the coil pressing member 10 and the salient pole coil on the rotation direction R side. Further, the anti-rotation direction side spacer 16 having no through hole is sandwiched between the anti-rotation direction side salient pole coil and the anti-rotation direction side coil 16 and attached to the salient pole magnetic core. In this embodiment, the rotation direction side through hole 1 is formed in the rotation direction side spacer 14 in contact with the salient pole coil surface in the rotation direction R having a small heat transfer coefficient.
5 is provided, the amount of cooling air flowing into the central portion of the rotor is increased, and the heat transfer coefficient in this portion is improved. Further, there is an advantage that the shape of the coil pressing member 10 is symmetrical about the bolt hole 13.

In the rotor of the salient pole type rotating electric machine according to the fifth embodiment shown in FIG. 5, the coil pressing member 10 has a rotating direction side spacer 14 having a rotating direction side through hole 15 penetrating in the axial direction. It is attached to the salient pole iron core by sandwiching the counter-rotational direction side through hole 17 or the counter-rotational direction side spacer 16. In this embodiment, the spacers 14 and 16 are provided with through holes 15 and 17, and the cooling air flows through these through holes 15 and 17,
The heat transfer coefficient on the surface of the central portion of the salient pole coil is improved.

In the sixth embodiment shown in FIG. 6, holes 15 and 1 are formed on both sides of the coil pressing member 10 so as to penetrate therethrough in the axial direction.
In this configuration, spacers 14 and 16 having 7 are sandwiched and attached to the salient pole core. The cross-sectional area of the through hole 15 of the spacer 14 that contacts the field coil on the rotation direction R side is larger than the cross-sectional area of the through hole 17 of the spacer 16 that contacts the field coil on the opposite rotation direction side. In this embodiment, the cross-sectional area of the through hole of the spacer 14 in contact with the field coil surface on the rotation direction R side, which has a small heat transfer coefficient, is large, and a larger amount of cooling air flows therethrough than on the counter rotation direction side. ,
The heat transfer coefficient in this portion is improved.

Next, FIG. 7 shows from the outer diameter side the attachment state of the rectifying body 18 between the pressing members 10 of the rotor coil of the salient pole type rotating electric machine according to the seventh to tenth embodiments of the present invention. 8 to 11 are schematic views of the rectifying body 18 installed between the coil pressing members 10 which are essential parts of the rotor of the salient pole type rotating electrical machines according to the seventh to tenth embodiments. FIG. 8 is a vertical sectional view of a portion A shown in FIG. 7.

In the seventh embodiment shown in FIG. 8, a rectifier 18 having a trapezoidal cross section having a surface parallel to the surface of the salient magnetic pole coil 3 is provided between a plurality of coil pressing members 10 provided in the axial direction. It is a composition. Surface of rectifier 18 and salient pole coil 3
A space is formed between the surfaces of the. With this configuration, a part of the cooling air that has passed through the space below the coil or the above-described notches 11 and 11a of the coil pressing member 10 or the through holes 15 and 17 of the spacers 14 and 16 is formed along the surface of the salient magnetic pole coil 3. Flows through the space toward the outer diameter side.
Therefore, as compared with the case where the rectifying body 18 is not provided, the cooling air flows along the surface of the salient magnetic pole coil 3 and the flow velocity thereof also increases, so that the heat transfer coefficient increases and the salient magnetic pole coil 3 is operated with a small air flow rate. It can be cooled efficiently.

In the eighth embodiment shown in FIG. 9, a rectifying body 19 having a trapezoidal cross section having a side surface in which the space between the coil pressing member 10 and the salient pole coil 3 becomes narrower as the outer diameter increases is installed. It is a composition. With this configuration, the space below the coil or the above-described notches 11 and 11a of the coil pressing member 10 or the through holes 15 of the spacers 14 and 16,
A part of the cooling air passing through 17 has a higher flow velocity as it goes to the outer diameter side along the surface of the salient magnetic pole coil 3.
Therefore, as compared with the case where the rectifying body 19 is not provided, the cooling air flows along the surface of the salient magnetic pole coil 3 and the flow velocity thereof also increases, so that the heat transfer coefficient becomes large and the salient magnetic pole coil 3 is operated with a small air flow rate. It can be cooled efficiently.

The ninth embodiment shown in FIG. 10 has a structure in which a V-shaped rectifying plate 21 having a side surface parallel to the surface of the salient magnetic pole coil 3 is provided between the coil pressing members 10. With this configuration, the space below the coil or the above-described notches 11 and 11a of the coil pressing member 10 or the spacer 1 is formed.
Part of the cooling air that has passed through the through holes 15 and 17 of 4 and 16 flows to the outer diameter side along the surface of the salient magnetic pole coil 3. Therefore, as compared with the case where the rectifying plate 21 is not provided, the cooling air flows along the surface of the salient magnetic pole coil 3 and its flow velocity also increases, so that the heat transfer coefficient increases and the salient magnetic pole coil 3 is cooled efficiently. can do.

In the tenth embodiment shown in FIG. 11, a V-shaped rectifying plate 2 having side faces between the coil pressing members 10 is formed such that the distance between the coil pressing members 10 and the salient magnetic pole coils 3 becomes narrower.
2 is installed. With this configuration, the space below the coil or the above-described notch 1 of the coil pressing member 10 is provided.
1, 11a or through holes 15, 1 of spacers 14, 16
A part of the cooling air passing through 7 has a higher flow velocity as it goes to the outer diameter side along the surface of the salient magnetic pole coil 3. Therefore, as compared with the case where the flow straightening plate 22 is not provided, the cooling air flows along the surface of the salient magnetic pole coil 3 and at the same time, the flow velocity of the cooling air also increases, so that the heat transfer coefficient becomes large and the salient magnetic pole becomes small. The coil 3 can be cooled efficiently.

[0030]

According to the present invention, there is provided a salient-pole type rotating electric machine rotor having a small temperature difference in the salient-pole coil, a low maximum temperature, and a compact salient-pole coil and a long service life. Can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a coil pressing member in a rotor of a salient pole type rotary electric machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a coil pressing member in a rotor of a salient pole type rotating electric machine according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a coil pressing member in a rotor of a salient pole type rotating electric machine according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a coil pressing member in a rotor of a salient pole type rotating electric machine according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view of a coil pressing member in a rotor of a salient pole type rotary electric machine according to a fifth embodiment of the present invention.

FIG. 6 is a sectional view of a coil pressing member in a rotor of a salient pole type rotating electric machine according to a sixth embodiment of the present invention.

FIG. 7 is a plan view showing how the rectifying body is mounted between the coil pressing members in the rotor of the salient pole type rotary electric machine according to the seventh to tenth embodiments of the present invention.

FIG. 8 is a cross-sectional view taken along line AA of FIG. 7, showing a rectifying body in a rotor of a salient pole type rotating electric machine according to a seventh embodiment of the present invention.

FIG. 9 is a cross-sectional view taken along line AA of FIG. 7, showing a rectifying body in a rotor of a salient pole type rotating electric machine according to an eighth embodiment of the present invention.

FIG. 10 is a cross-sectional view taken along the line AA of FIG. 7 showing a rectifier in a rotor of a salient pole type rotary electric machine according to a ninth embodiment of the present invention.

FIG. 11 is a cross-sectional view taken along the line AA of FIG. 7, showing a rectifying body in the rotor of the salient pole type rotary electric machine according to the tenth embodiment of the present invention.

FIG. 12 is a partial vertical cross-sectional view showing a rotor of a conventional salient-pole rotary electric machine.

FIG. 13 shows a rotor of a conventional salient-pole rotary electric machine, and FIG.
2 is a perspective view of a B portion of 2. FIG.

[Explanation of symbols]

1 ... Rotor, 2 ... Salient pole core, 3 ... Salient pole coil, 4 ...
Magnetic pole shoe, 5 ... Insulation collar, 6 ... Holding bolt, 7 ...
Coil pressing member, 8 ... Implant bolt, 9 ... Tightening nut, 10 ... Coil pressing member, 11 ... Notch, 11a ...
Rotation direction side notch, 13 ... Bolt hole, 14 ... Rotation direction side spacer, 15 ... Rotation direction side through hole, 16 ... Counter rotation direction side spacer, 17 ... Counter rotation direction side through hole, 18 ... Rectifier, 19 ... Rectifier, 20 ... Cooling air, 21 ... Rectifier plate, 2
2 ... Rectifier plate, 23 ... Salient magnetic pole end, R ... Rotation direction.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshio Hashidate             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office (72) Inventor Mikio Takahata             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office F term (reference) 5H603 AA12 AA14 BB01 BB02 BB09                       BB12 CA02 CA04 CB01 CC11                       CC17 CD02 CD04 CD22 CE01                       CE05 EE13 FA01                 5H604 AA03 BB01 BB03 BB10 BB14                       CC02 CC05 DB30 QA01

Claims (8)

[Claims] 1. A rotor of a salient pole type rotating electrical machine comprising a coil pressing member for pressing a side surface of a salient magnetic pole coil mounted on a salient magnetic pole iron core, wherein the coil pressing member has a contact surface with the salient magnetic pole coil. A rotor for a salient-pole type rotating electric machine having a notch or a hole penetrating in the axial direction in the vicinity thereof. 2. The rotor of a salient pole type rotating electric machine according to claim 1, wherein the notch or the hole of the coil pressing member is formed only on the contact surface on the rotation direction side. 3. A rotor of a salient pole type rotating electric machine comprising a coil pressing member for pressing a side surface of a salient magnetic pole coil mounted on a salient magnetic pole iron core, wherein an axial direction is provided between the coil pressing member and the salient magnetic pole coil. A rotor of a salient pole type rotating electric machine, characterized in that a spacer having a notch or a hole penetrating therethrough is provided. 4. The rotor of a salient pole type electric rotating machine according to claim 3, wherein the notch or hole penetrating in the axial direction is formed only in the spacer on the rotation direction side. 5. The area of the notch or hole formed in the spacer on the rotation direction side is larger than the area of the notch or hole formed in the spacer on the counter rotation side. Rotor of salient pole type rotating electric machine. 6. A plurality of coil pressing members are provided in the axial direction, and a rectifying body having a surface facing a side surface of the salient magnetic pole coil with a predetermined space provided between the plurality of coil pressing members. The rotor of a salient pole type rotating electric machine according to any one of claims 1 to 5. 7. The rotor of a salient-pole rotating electric machine according to claim 6, wherein the rectifying body has a triangular, trapezoidal or V-shaped cross-section in a direction orthogonal to the axis. 8. A rotor for a salient pole type rotating electric machine according to claim 6, wherein the space between the rectifying body and the side surface of the salient pole coil is formed so as to become narrower toward the outer diameter. .