JP5262583B2 - Resolver integrated rotary electric machine and rotor core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the shaft length of a motor by integrally incorporating a resolver into the motor. <P>SOLUTION: A rotating shaft 3 having a cylindrical portion 3c via a hub 3b on the external circumference of a center shaft 3a is used. A rotor 4 of a motor is attached to the external circumferential side of the cylindrical portion 3c of the rotating shaft 3. A resolver rotor 7 is arranged on the internal circumferential side of the cylindrical portion 3c of the rotating shaft 3. A notch 8 is formed on the cylindrical portion 3c, and the rotor 4 for a motor and the resolver rotor 7 are integrally coupled (or by key coupling) to each other via a coupling portion 9 penetrating through the notch 8. A resolver stator 10 is arranged to be fixed inside in a radius direction of the resolver rotor 7. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a resolver-integrated rotating electrical machine in which a resolver (rotation detector) is integrally incorporated in a motor, and a rotor core structure thereof.

  In a motor configured to include a rotor and a stator, it is necessary to detect the rotational position of the rotor for rotation control, and a resolver is provided.

  The resolver includes a resolver rotor and a resolver stator, and the resolver rotor is usually attached to the rotation shaft of the motor rotor side by side with the motor rotor. For this reason, providing a resolver increases the size of the motor in the axial direction.

Therefore, in Patent Document 1, an annular hollow region is formed around the rotation shaft on the end side in the axial direction of the motor rotor, and a resolver stator is disposed in the hollow region, and the hollow region of the motor rotor is arranged. An annular portion (inner peripheral surface) that surrounds is configured to function as a resolver rotor.
JP 2008-141908 A

  However, according to the configuration of Patent Document 1, although the shaft length of the motor can be shortened, the portion surrounding the hollow region of the motor rotor cannot be directly supported by the rotating shaft, and the support strength of the rotor is low. It will drop significantly.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resolver-integrated rotating electrical machine that can reduce the axial length of a motor without causing a decrease in rotor support strength.

For this reason, in the present invention, the resolver-integrated rotating electrical machine is provided with a notch in a hollow portion that opens to at least one axial end surface , and a cylindrical portion between an inner peripheral surface and an outer peripheral surface forming the hollow portion. A rotating shaft having a motor, a motor rotor attached to an outer peripheral side of the rotating shaft and rotatable integrally with the rotating shaft, a motor stator fixedly disposed radially outward of the motor rotor, and the rotation disposed within the hollow portion of the shaft Rutotomoni, is coupled through a coupling portion which penetrates a-out rotor and the cutout for the motor, a rotor for rotatable resolver integrally with the rotor for the motor, said rotary shaft constituting include a resolver stator fixedly disposed radially inwardly of the rotor for the resolver within the hollow portion.

  According to the present invention, a rotating shaft (cylindrical rotating shaft) having a hollow portion opened on at least one axial end surface is used, and a motor rotor is arranged on the outer peripheral side of the cylindrical portion, and the inner periphery of the cylindrical portion is arranged. Since the resolver rotor is arranged on the side, the motor rotor and the resolver rotor can be easily supported by the rotating shaft, and the shaft length of the motor can be shortened without reducing the support strength of the rotor. it can.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a front view of a resolver-integrated rotating electrical machine showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a front view of a resolver-integrated rotor core (laminated electromagnetic steel sheet). 4 is a cross-sectional view taken along line BB in FIG.

  The motor (motor generator) includes a motor housing 1, a pair of bearings 2 attached to the motor housing 1, a rotating shaft (rotor shaft) 3 rotatably supported by these bearings 2, and an outer periphery of the rotating shaft 3. The motor rotor 4 that is attached to the side and can rotate integrally with the rotary shaft 3 and the motor stator 6 that is fixedly arranged radially outward of the motor rotor 4 are configured.

  The rotating shaft 3 includes a center shaft (hollow shaft) 3a rotatably supported at both ends by a pair of bearings 2, a hub 3b projecting radially outward from an axial middle portion of the center shaft 3a, It comprises a cylindrical portion 3c connected to the outer peripheral side of 3a via a hub 3b. Accordingly, the inner peripheral side of the cylindrical portion 3c forms a hollow portion 3d.

  In other words, a hollow portion 3d that opens to at least one axial end surface of the rotating shaft 3 is formed, and a cylindrical portion 3c is formed between the outer peripheral surface of the rotating shaft 3 and the inner peripheral surface that forms the hollow portion 3d. .

  Further, on the other end side of the rotating shaft 3, a flange portion 3 e that protrudes outward in the radial direction from the end portion of the cylindrical portion 3 c that is a support portion of the rotor 4 is provided.

  The motor rotor 4 is formed by laminating annular electromagnetic steel plates and embedding a plurality (eight poles in this example) of permanent magnets 5 extending in the axial direction at predetermined intervals (equal intervals) in the circumferential direction in the vicinity of the outer peripheral surface. In addition, each permanent magnet 5 is divided into two and arranged in a V shape (5a and 5b). Each permanent magnet 5 is divided into a plurality (four in FIG. 2) in the axial direction to reduce eddy current loss.

  As shown in FIG. 5, the arrangement of the magnetic poles (N-S poles) of the permanent magnets 5 is such that each permanent magnet 5 has the arrangement of the NS poles on the radially outer side and the inner side alternately in the circumferential direction. .

  The motor stator 6 is formed by laminating annular electromagnetic steel plates, and three-phase in slots (not shown) formed so as to extend in the axial direction at predetermined intervals (equal intervals) in the circumferential direction on the inner peripheral surface. A coil (not shown) is wound.

  This motor serves as both a motor and a generator. When the motor is operated, the motor rotor 4 is rotated by a magnetic field generated by a current supplied to the coil of the motor stator 6, and the output is extracted from the rotating shaft 3. . On the other hand, when operating as a generator, the motor rotor 4 is rotated by the rotating shaft 3, and a current is generated in the coil of the motor stator 6 by the rotation of the motor rotor 4.

  In such a motor, it is necessary to detect the rotational position of the motor rotor 4 for rotation control, and a resolver (rotation detector) is used.

  The resolver generally comprises a resolver rotor that can rotate integrally with a motor rotor, and a resolver stator that is fixedly arranged inward or outward in the radial direction of the resolver rotor, and is used for a resolver by rotation of the resolver rotor. The rotation position of the resolver rotor (motor rotor) is detected by detecting a change in the gap between the rotor and the resolver stator using a coil on the resolver stator side.

  In the present embodiment, the resolver rotor 7 is formed in an annular shape and disposed in the hollow portion 3d (cylindrical portion 3c inner peripheral side) of the rotating shaft 3, and the outer peripheral side (cylindrical portion 3c outer peripheral side) of the rotating shaft 3. The motor rotor 4 is integrally connected.

  For this reason, in the rotating shaft 3, a notch 8 extending in the axial direction from the axial end is provided in the cylindrical portion 3c between the outer peripheral surface and the inner peripheral surface forming the hollow portion 3d. A plurality (four in this example) are formed at intervals (equal intervals).

  The motor rotor 4 and the resolver rotor 7 are connected via a connecting portion 9 that penetrates the notch 8 of the cylindrical portion 3 c of the rotating shaft 3. In addition, since the connection part 9 is provided corresponding to the notch 8, similarly to the notch 8, a plurality (four in this example) are provided at predetermined intervals (equal intervals) in the circumferential direction.

  Therefore, in this embodiment, the motor rotor 4 and the resolver rotor 7 (these laminated electromagnetic steel plates) are integrally formed as shown in FIG. 3 and fitted on the outer peripheral side of the rotating shaft 3 (cylindrical portion 3c). A rotor portion for a motor (4) to be mated, a rotor portion for a resolver (7) fitted to the inner peripheral side of the rotating shaft 3 (cylindrical portion 3c), and a rotor portion for a motor and a resolver penetrating the notch 8 It consists of the connection part 9 which connects the rotor part for a motor.

  Further, as shown in FIG. 4, the electromagnetic steel sheet constituting the motor rotor 4 is divided into first and second blocks (rotor core blocks) BL1 and BL2 in the stacking direction, and the resolver rotor 7 is provided only in the second block BL2. The electromagnetic steel plates constituting the are integrally connected.

  In other words, the first rotor core block BL1 is formed by laminating the conventional electromagnetic steel plates shown in FIG. 6 and has only a motor rotor portion (4) that can be fitted to the outer peripheral side of the rotating shaft 3. . Note that reference numeral 4a in FIG. 6 denotes a key when the rotary shaft 3 is key-coupled.

  The second rotor core block BL2 is formed by laminating the electromagnetic steel plates shown in FIG. 3, and is fitted to the motor rotor portion (4) that can be fitted to the outer peripheral side of the rotary shaft 3 and the inner peripheral side of the rotary shaft 3. A resolver rotor portion (7) that can be combined, and a connecting portion 9 that passes through the notch 8 and connects the motor rotor portion and the resolver rotor portion.

  Then, the first and second rotor core blocks BL1 and BL2 are joined together, and these motor rotors 4 are fitted to the outer peripheral side of the cylindrical portion 3c of the rotating shaft 3 from one end side, and the other end side is fitted. It strikes against the buttocks 3e. Then, by caulking one end side of the cylindrical portion 3c, the cylindrical portion 3c is clamped and fixed between the caulking fixing portion (not shown) and the flange portion 3e on the other end side. If necessary, an end plate is interposed between the caulking fixing portion and the rotor core.

  At this time, the motor rotor 4 is integrated with the rotary shaft 3 by press-fitting into the outer peripheral side of the cylindrical portion 3c of the rotary shaft 3 or by connecting with the outer peripheral side of the cylindrical portion 3c of the rotary shaft 3 using a key. Fix to rotate. The motor rotor 4 of the second rotor core block BL2 is fixed so as to rotate integrally with the rotary shaft 3 by engaging the notch 8 of the rotary shaft 3 with the connecting portion 9 in the rotational direction. Also good.

  In addition, the resolver rotor 7 is integrally connected to the motor rotor 4, and of course, the resolver rotor 7 rotates integrally with the motor rotor 4 via the connecting portion 9. The shaft 3 is fixed so as to rotate integrally with the rotating shaft 3 by press-fitting into the inner peripheral side of the cylindrical portion 3c of the shaft 3 or by engaging with the notch 8 of the rotating shaft 3 via the connecting portion 9 in the rotating direction. The strength in the rotational direction may be ensured.

  The resolver stator 10 is fixedly disposed inward in the radial direction of the resolver rotor 7 in the hollow portion 3 d of the rotating shaft 3. Therefore, the resolver stator 10 is fixedly supported on the motor housing 1 via the bracket 11.

  The resolver stator 10 has a detection coil, and detects a change in the gap between the resolver rotor 7 and the resolver stator 10 due to the rotation of the resolver rotor 7, so that the resolver rotor 7 (and therefore the motor rotor 4). ) Is detected. Therefore, the resolver rotor 7 is provided with convex portions 7a at two locations in the circumferential direction of the inner peripheral portion (FIG. 3) in order to cause a change in the gap, and the inner peripheral portion has an “egg shape”.

  According to the present embodiment, the resolver (resolver rotor 7 and resolver stator 10) is disposed radially inward of the motor rotor 4 (inside the rotation shaft 3), so that the rotor including the resolver rotor is included. The overall length can be shortened, and the motor shaft length can be greatly shortened.

  In addition, according to the present embodiment, the rotating shaft (cylindrical rotating shaft) 3 having the hollow portion 3d that opens at at least one axial end surface is used, and the motor rotor 4 is disposed on the outer peripheral side of the cylindrical portion 3c. Since the resolver rotor 7 is arranged on the inner peripheral side of the cylindrical portion 3c, the motor rotor 4 and the resolver rotor 7 can be easily supported by the rotating shaft 3, and the support strength of the rotors 4 and 7 can be increased. The shaft length of the motor can be shortened without causing a decrease.

  That is, in the configuration of the above-described Patent Document 1, although the shaft length of the motor can be shortened, the portion surrounding the hollow region of the motor rotor cannot be directly supported by the rotating shaft, and the support strength of the rotor is low. As a result, it is difficult to construct the rotor by laminating magnetic steel sheets, and even if it is constructed integrally from soft magnetic powder material, sufficient support strength cannot be obtained and it should be an integral object. However, in this embodiment, these points can be improved.

  In addition, according to the present embodiment, the motor rotor 4 and the resolver rotor 7 are connected to each other through the connecting portion 9 penetrating the notch 8 provided in the rotating shaft 3, so that Positioning of the resolver rotor 7 with respect to the rotor 4 becomes extremely easy. In particular, the positioning is unnecessary by connecting them together. Thereby, it contributes to the improvement of the assembly accuracy and consequently the rotation detection accuracy.

  That is, when the motor rotor and the resolver rotor are separately attached to the rotating shaft by, for example, key coupling as in the prior art, these positional relationships are included when forming the respective key grooves on the rotating shaft. If it is not formed with extremely high accuracy, a phase shift occurs between the motor rotor and the resolver rotor, and the rotation detection accuracy deteriorates.

  In this respect, in this embodiment, the motor rotor 4 and the resolver rotor 7 are integrally connected in advance, so that the phases of the motor rotor 4 and the resolver rotor 7 are not shifted by the mounting, Therefore, it is possible to improve the rotation detection accuracy without the need for high-precision machining.

  Further, according to the present embodiment, the cylindrical portion 3c of the rotating shaft 3 (substantial air gap formed by a long hole provided in the rotor for inserting the rotor shaft 3) is provided between the motor rotor 4 and the resolver rotor 7. Therefore, the magnetic flux from the permanent magnet 5 on the motor rotor 4 side can be reduced (practically) to the resolver rotor 7 side to a practically sufficient level, and the rotation detection performance may be deteriorated. Nor.

  That is, in the configuration of Patent Document 1 described above, since there is no member that blocks the flow of magnetic flux between the motor rotor and the resolver rotor, the magnetic flux on the motor rotor (its permanent magnet) side is the resolver rotor. The original rotation detection performance cannot be exhibited by reading this on the resolver stator side, and practical use is considered difficult, but in this embodiment, this point can be improved. it can.

  Further, regarding the possibility that the magnetic field formed by the permanent magnet 5 on the motor rotor 4 side affects the resolver rotor 7 via the connecting portion 9, as shown in FIG. -S pole) The arrangement and the arrangement of the connecting portion 9 are associated with each other, and all the connecting portions 9 correspond to the S pole of the permanent magnet 5, thereby minimizing the influence on the resolver rotor 7 side via the connecting portion 9. (Because SS does not produce a flow of magnetic flux). Of course, even if all the connecting portions 9 are made to correspond to the N pole of the permanent magnet 5, the same effect can be obtained (because the flow of magnetic flux does not occur even with N-N).

  Accordingly, it is desirable that the plurality of connecting portions 9 provided in the circumferential direction are arranged at circumferential positions where the inner permanent magnets of the plurality of permanent magnets 5 have the same polarity.

  For this reason, in this embodiment, four half of the connecting portions 9 are provided for the 8-pole permanent magnet, and all correspond to the S pole. Alternatively, all four may correspond to the N pole. Alternatively, two connecting portions 9 may be provided for an 8-pole permanent magnet, and all of them may correspond to the S pole (or N pole).

  Therefore, according to the present embodiment, it is possible to provide a resolver-integrated dynamoelectric machine that can reduce the axial length of the motor without causing a decrease in rotor support strength and a deterioration in rotation detection performance.

  FIG. 7 is a front view of a resolver-integrated rotor core (the laminated electromagnetic steel sheet) showing a modification of the first embodiment.

  In this modification, the connecting portions 9 that connect the motor rotor 4 and the resolver rotor 7 are two places in the circumferential direction. Of course, the notch 8 of the rotating shaft 3 is also two places in the circumferential direction.

  Further, the resolver rotor 7 is not formed in an annular shape but is formed in an arc shape for each connecting portion 9 so as to indicate the magnetic pole position (rotational position).

  According to this modification, the resolver rotor 7 can be reduced in weight, and the support structure of the resolver rotor 7 can be simplified. That is, it can be supported only by the connecting portion 9.

  8 is a front view of a resolver-integrated rotating electrical machine showing a second embodiment of the present invention, FIG. 9 is a cross-sectional view taken along line AA of FIG. 8, and FIG. 10 is a front view of a resolver-integrated rotor core (laminated electrical steel sheet). 11 is a cross-sectional view taken along the line BB in FIG.

  About 2nd Embodiment, a different point from 1st Embodiment is demonstrated.

  In the second embodiment, the motor rotor 4 and the resolver rotor 7 are formed of separate members. Then, a connecting portion 9 is formed integrally with the resolver rotor 7 which is one of the members, and a concave portion (key groove) 12 in which the connecting portion 9 is key-coupled to the motor rotor 4 which is the other member. Are connected by key combination.

  Moreover, the connection part 9 is formed in two places of the circumferential direction, and the notch 8 of the rotating shaft 3 is also made into two places of the circumferential direction according to this. These two locations also correspond to the same polarity (for example, S pole) of the permanent magnet 5.

  Further, as shown in FIG. 11, the electromagnetic steel sheet constituting the motor rotor 4 is divided into the first and second blocks (rotor core blocks) BL1 and BL2 in the stacking direction, and the resolver rotor 7 is provided only in the second block BL2. The electrical steel sheets constituting the are connected.

  According to the present embodiment, the resolver rotor 7 can be assembled to the position aligned with the magnetic pole position of the motor rotor 4 by key-connecting the resolver rotor 7 to the motor rotor 4. In addition, a substantial air gap can be formed in the key coupling portion between the connecting portion 9 and the recess 12, and the magnetic flux from the permanent magnet 5 on the motor rotor 4 side can be formed by this air gap. Thus, the rotation detection accuracy can be further improved.

  However, since the connection strength is lower than that in the case of connecting together, the rotary shaft 3 and the resolver rotor are pressed by, for example, pressing the resolver rotor 7 into the inner peripheral side of the cylindrical portion 3c of the rotary shaft 3. It is desirable to fix more firmly between the two.

  FIG. 12 is a front view of a resolver-integrated rotor core (its laminated electromagnetic steel sheet) showing a modification of the second embodiment.

  This modification is the same in that the motor rotor 4 and the resolver rotor 7 are formed as separate members. However, the connecting portion 9 is formed integrally with the motor rotor 4 so as to protrude from the resolver rotor 7. The connecting portion 9 forms a recess 12 where the key is connected, and the two are connected by key connection. Of course, the same effect can be obtained even in this way.

  In the first and second embodiments, as shown in FIGS. 4 and 11, the conventional rotor core block BL1 and the resolver-integrated rotor core block BL2 are combined. Only the rotor core block BL2 may be used so that parts can be shared.

  When two resolvers are provided in one motor and used for fail-safe etc., as shown in FIG. 13, resolver-integrated rotor core blocks BL2 and BL2 ′ are arranged at both ends of a conventional rotor core block BL1. Thus, a dual resolver can be realized by using an appropriate support structure.

  FIG. 14 is a cross-sectional view of a resolver-integrated dynamoelectric machine showing a third embodiment of the present invention.

  In the present embodiment, the motor rotor 4 and the resolver rotor 7 are formed separately without being connected.

  The motor rotor 4 is formed in an annular shape, and is fitted and fixed to the outer peripheral surface of the cylindrical portion 3c of the rotating shaft 3 using a key or the like as appropriate.

  The resolver rotor 7 is formed in an annular shape, disposed in the hollow portion 3d of the rotating shaft 3 (on the inner peripheral side of the cylindrical portion 3c), and is fitted and fixed to the inner peripheral surface of the cylindrical portion 3c using a key or the like as appropriate.

  The resolver stator 10 is fixedly disposed inward in the radial direction of the resolver rotor 7 in the hollow portion 3 d of the rotating shaft 3. For this reason, the resolver stator 10 is fixedly supported on the motor housing 1 via the bracket 11.

  According to the present embodiment, the resolver (resolver rotor 7 and resolver stator 10) is disposed radially inward of the motor rotor 4 (inside the rotation shaft 3), so that the rotor including the resolver rotor is included. The overall length can be shortened, and the motor shaft length can be greatly shortened.

  Further, a rotating shaft (cylindrical rotating shaft) 3 having a hollow portion 3d that is open at least in one axial end surface is used, and a motor rotor 4 is disposed on the outer peripheral side of the cylindrical portion 3c. Since the resolver rotor 7 is arranged on the circumferential side, the motor rotor 4 and the resolver rotor 5 can be easily supported by the rotating shaft 3, and the motor 4 and the support strength of the rotor 7 are not reduced. Can be shortened.

  Here, in particular, a sufficient support strength is obtained by fixing the resolver rotor 7 to the inner peripheral surface of the cylindrical portion 3 c of the rotating shaft 3.

  Further, since the motor rotor 4 and the resolver rotor 7 are separated by the cylindrical portion 3c of the rotating shaft 3 therebetween, the magnetic field formed by the permanent magnet 5 on the motor rotor 4 side is resolved. It does not affect the rotor 7 for use, and there is no possibility of deteriorating the rotation detection performance.

  FIG. 15 is a sectional view of a resolver-integrated dynamoelectric machine showing a fourth embodiment of the present invention.

  In the present embodiment, the motor rotor 4 and the resolver rotor 7 are formed separately without being connected.

  The motor rotor 4 is formed in an annular shape, and is fitted and fixed to the outer peripheral surface of the cylindrical portion 3c of the rotating shaft 3 using a key or the like as appropriate.

  The resolver rotor 7 is formed in an annular shape, disposed in the hollow portion 3d of the rotating shaft 3 (inner peripheral side of the cylindrical portion 3c), and fitted and fixed to the outer peripheral surface of the central shaft 3a using a key or the like as appropriate.

  The resolver stator 10 is fixedly disposed radially outward of the resolver rotor 7 in the hollow portion 3 d of the rotating shaft 3. For this reason, the resolver stator 10 is fixedly supported on the motor housing 1 via the bracket 11.

  According to the present embodiment, the resolver (resolver rotor 7 and resolver stator 10) is disposed radially inward of the motor rotor 4 (inside the rotation shaft 3), so that the rotor including the resolver rotor is included. The overall length can be shortened, and the motor shaft length can be greatly shortened.

  Further, a rotating shaft (cylindrical rotating shaft) 3 having a hollow portion 3d that is open at least in one axial end surface is used, and a motor rotor 4 is disposed on the outer peripheral side of the cylindrical portion 3c. Since the resolver rotor 7 is arranged on the circumferential side, the motor rotor 4 and the resolver rotor 5 can be easily supported by the rotating shaft 3, and the motor 4 and the support strength of the rotor 7 are not reduced. Can be shortened.

  Here, particularly, the resolver rotor 7 is fixed to the outer peripheral surface of the central shaft 3 a of the rotating shaft 3, thereby obtaining sufficient support strength.

  Further, since the motor rotor 4 and the resolver rotor 7 (and the stator 10) are separated with the cylindrical portion 3c of the rotating shaft 3 interposed therebetween, they are formed by the permanent magnet 5 on the motor rotor 4 side. The applied magnetic field does not affect the resolver rotor 7 (and the stator 10), and the rotation detection performance is not deteriorated.

The front view of the resolver integrated rotary electric machine which shows 1st Embodiment of this invention. AA sectional view of FIG. Front view of resolver-integrated rotor core (the laminated electromagnetic steel sheet) in the first embodiment BB sectional view of FIG. The figure which shows the magnetic pole arrangement | positioning of the permanent magnet in the rotor for motors Diagram showing a conventional rotor core (laminated magnetic steel sheet) The front view of the resolver integrated rotor core (the laminated electromagnetic steel plate) which shows the modification of 1st Embodiment The front view of the resolver integrated rotary electric machine which shows 2nd Embodiment of this invention. AA sectional view of FIG. Front view of resolver-integrated rotor core (the laminated electromagnetic steel plate) in the second embodiment BB sectional view of FIG. The front view of the resolver integrated rotor core (the laminated electromagnetic steel plate) which shows the modification of 2nd Embodiment Diagram showing examples of coupling of rotor core blocks for dual resolver Sectional drawing of the resolver integrated rotary electric machine which shows 3rd Embodiment of this invention Sectional drawing of the resolver integrated rotary electric machine which shows 4th Embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor housing 2 Bearing 3 Rotating shaft 3a Center shaft 3b Hub 3c Cylindrical part 3d Hollow part 3e Eaves part 4 Motor rotor (Motor rotor part)
5 (5a, 5b) Permanent magnet 6 Motor stator 7 Resolver rotor (resolver rotor part)
7a Convex part for gap change 8 Notch 9 Connecting part 10 Resolver stator 11 Bracket 12 Concave part for key connection

Claims (11)

A hollow portion opening in at least one axial end surface , and a rotating shaft having a notch in a cylindrical portion between an inner peripheral surface and an outer peripheral surface forming the hollow portion ;
A motor rotor attached to the outer peripheral side of the rotary shaft and rotatable integrally with the rotary shaft;
A motor stator fixedly arranged radially outward of the motor rotor;
Rutotomoni disposed within said hollow portion of said rotary shaft, is coupled through a coupling portion which penetrates a-out rotor and the cutout for the motor, a rotor for rotatable resolver integrally with the motor rotor,
A resolver stator fixedly disposed radially inwardly of the rotor for the resolver within the hollow portion of the rotary shaft,
A resolver-integrated rotating electrical machine comprising: The motor rotor and the resolver rotor are integrally formed, the motor rotor portion that fits on the outer peripheral side of the cylindrical portion, the resolver rotor portion that fits on the inner peripheral side of the cylindrical portion, 2. The resolver-integrated rotating electrical machine according to claim 1, wherein the connecting portion connecting the motor rotor portion and the resolver rotor portion through the notch is integrally provided. The rotor for the motor and the rotor for the resolver are formed as separate members, the connecting portion is integrally formed to protrude from one of the members, and a recess is formed in the other member to which the connecting portion is key-coupled. 2. The resolver-integrated dynamoelectric machine according to claim 1, wherein the resolver-integrated dynamoelectric machine is connected by key coupling. The resolver-integrated dynamoelectric machine according to any one of claims 1 to 3, wherein the resolver rotor is formed in an annular shape. The resolver-integrated dynamoelectric machine according to any one of claims 1 to 3, wherein the resolver rotor is formed in an arc shape. The motor rotor and the resolver rotor are formed by laminating electromagnetic steel plates, and the electromagnetic steel plates constituting the motor rotor are divided into two blocks in the laminating direction, and only one of these blocks is the resolver. 6. The resolver-integrated rotating electrical machine according to claim 1, wherein the electromagnetic steel plates constituting the rotor are connected. The rotor for a motor has a plurality of permanent magnets at predetermined intervals in the circumferential direction, and the plurality of permanent magnets are alternately arranged in the circumferential direction, and the arrangement of NS poles on the radially outer side and the inner side is reversed. And
The said connection part is provided with two or more by the circumferential direction, and each is arrange | positioned in the circumferential direction position with the permanent magnet of the same polarity among these permanent magnets. The resolver-integrated rotary electric machine according to any one of the above. Laminated magnetic steel sheets,
A rotor portion for a motor that can be fitted to the outer peripheral side of a cylindrical rotating shaft;
A resolver rotor portion that can be fitted to the inner peripheral side of the rotating shaft;
A connecting portion that passes through the notch provided in the cylindrical portion of the rotating shaft and connects the rotor portion for the motor and the rotor portion for the resolver;
A rotor core comprising: A first rotor core block having a motor rotor portion that can be fitted on the outer peripheral side of a cylindrical rotating shaft, and is formed by laminating electromagnetic steel plates;
Laminated electromagnetic steel sheets, in addition to the rotor portion for the motor, through the resolver rotor portion that can be fitted to the inner peripheral side of the rotating shaft, and the notch provided in the cylindrical portion of the rotating shaft, A second rotor core block integrally having a connecting portion that connects the rotor portion for the motor and the rotor portion for the resolver;
And a rotor core formed by combining these blocks. The rotor core according to claim 8 or 9, wherein the resolver rotor portion is formed in an annular shape. The rotor core according to claim 8 or 9, wherein the resolver rotor portion is formed in an arc shape.

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