JP6894294B2 - Rotor steel plate, rotor and rotary machine - Google Patents

Description

Embodiments of the present invention relate to rotor steel plates, rotors and rotary electric machines.

The rotor of a rotating electric machine may be provided with a skew in order to smooth the flow of magnetic flux and reduce torque ripple. When block skew is adopted as the skew method, it is desirable to provide as many skew steps as possible from the viewpoint of reducing torque ripple. However, in that case, there is a concern that imbalance may occur and the cost may increase because the types of rotor steel plates constituting the rotor core increase and the arrangement locations of the engaging grooves become uneven. To.

Japanese Unexamined Patent Publication No. 09-182387 Japanese Unexamined Patent Publication No. 2003-032930

Therefore, the present invention provides a rotor steel plate, a rotor, and a rotary electric machine, which can suppress an increase in the types of rotor steel plates constituting the rotor core while increasing the number of skew stages and can reduce the cost.

The rotor steel plate according to the embodiment constitutes a rotor core, and is a through hole provided around the center of the rotation axis and an engaging groove provided so as to form a part of the through hole. On the same surface, the first engaging groove whose deviation angle from the d-axis is 0 degrees, the second engagement groove whose deviation angle from the d-axis is the first angle, and the deviation angle from the d-axis. A third engaging groove, which is a second angle, is provided, and the second angle is twice the first angle.

Perspective view which shows the schematic structure of the rotor which concerns on 1st Embodiment A perspective view showing a schematic configuration of a rotor block constituting a rotor core. A plan view showing a schematic configuration of a rotor steel plate on the first surface side. A plan view showing a schematic configuration of a rotor steel plate on the second surface side. A perspective view showing a schematic configuration of a rotor according to a second embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In the following description, the direction parallel to the rotation center axis O is referred to as an axial direction. Further, the direction in which the rotation center axis O is coaxially orbited with respect to the rotation center axis O is referred to as a circumferential direction. Further, the direction orthogonal to the rotation center axis O is referred to as a radial direction. Regarding the angle, the clockwise direction is positive and the counterclockwise direction is negative.

(First Embodiment)
FIG. 1 is a perspective view showing a schematic configuration of the rotor 2 according to the first embodiment. FIG. 2 is a perspective view showing a schematic configuration of a rotor block 4 constituting the rotor core 3. FIG. 3 is a plan view showing a schematic configuration of the rotor steel plate 5 on the first surface A side, and FIG. 4 is a plan view showing a schematic configuration of the rotor steel plate 5 on the second surface B side.

As shown in FIG. 1, the rotary electric machine according to the present embodiment is a so-called IPM (Interior Permanent Magnet) type rotary electric machine in which a permanent magnet 6 is embedded inside the rotor core 3. In FIG. 1, a permanent magnet 6 is embedded in the magnet hole 7. As shown in FIGS. 3 and 4, the rotor 2 has a substantially V-shape in which two permanent magnets 6 per pole open on the outer peripheral surface 8 side of the rotor 2 in a cross section with respect to the rotation center axis O. It is arranged in the magnet hole 7 of. The rotor core 3 has 6 pole magnetic poles as shown in FIGS. 1 to 4.

The rotor 2 includes a rotating shaft 12 extending in the axial direction, and a substantially cylindrical rotor core 3 fitted and fixed to the outer periphery of the rotating shaft 12. The rotary shaft 12 constitutes a rotary electric machine by being rotatably supported by bearings (not shown) arranged around the rotation center shaft O.

The rotor core 3 has a block skew structure. The rotor core 3 includes four rotor blocks 4 having different angles with respect to magnetic poles, that is, a first rotor block 4a, a second rotor block 4b, a third rotor block 4c, and a fourth rotor block 4d. There is.

The rotor block 4 is formed by laminating a rotor steel sheet 5 obtained by punching an electromagnetic steel sheet having a thickness of, for example, several hundred μm in an annular shape in the O direction of the rotation center axis, and is formed by laminating a columnar laminated electromagnetic steel as a whole. It is configured to have a steel plate structure. The rotor core 3 is formed by laminating the rotor blocks 4 thus formed in the direction of the rotation center axis O.

As described above, the rotor steel plate 5 is formed with magnet holes 7 for embedding the permanent magnets 6. Here, the magnet hole 7 is a hole formed in a single electromagnetic steel plate, that is, a rotor steel plate 5 in order to embed two permanent magnets 6 per pole. The magnet holes 7 are arranged so as to have a substantially V shape that opens on the outer peripheral surface 8 side of the rotor core 3, and are formed at regular mechanical angles. Since the rotor core 3 of the present embodiment has a 6-pole structure, a set of magnet holes 7 arranged in a substantially V shape are arranged at 6 places at every 60 degrees of the machine angle.

By laminating the rotor steel plates 5 having two magnet holes 7 formed per pole in the axial direction, magnet holes 7 for embedding the permanent magnets 6 are formed in the rotor core 3. Then, the permanent magnet 6 is fixed in a state of being inserted into the magnet hole 7 of the rotor core 3. Further, two permanent magnets 6 form one magnetic pole. The magnetic poles formed by the two permanent magnets 6 are equidistant from each other along the circumferential direction of the rotor 2. The polarities of adjacent magnetic poles are arranged so as to be different from each other. The direction of the magnetic flux formed by the two permanent magnets 6 is the d-axis, and the direction that is electrically and magnetically orthogonal to the d-axis is the q-axis.

The rotor core 3 is formed by laminating a plurality of thin disk-shaped rotor steel plates 5. Through holes 14, engaging grooves, and the like are formed in the rotor steel plate 5 by punching. A through hole 14 penetrating in the axial direction is formed at the center of the rotor core 3 in the radial direction. The engaging groove 16 is formed so as to form a part of the through hole 14. The engaging groove 16 has a rectangular groove shape in which the rotation center axis O is open in the inner direction, that is, the radial center direction. As shown in FIG. 3 to be described later, assuming that the center of the engaging groove 16 is the engaging groove center 18, the position of the engaging groove center 18 of the engaging groove 16 coincides with the d-axis or has a predetermined deviation angle. It is provided in preparation.

The rotating shaft 12 is press-fitted into the through hole 14. A key 12a for locking the rotation direction of the rotor steel plate 5 is provided on the rotation shaft 12 on the side surface of the rotation shaft 12 so that the stretching direction thereof is the rotation center axis O direction. The rotating shaft 12 and the rotor core 3 are integrated by the key 12a of the rotating shaft 12 and the engaging grooves 16 of the plurality of rotor cores 3 being commonly engaged and fitted to prevent rotation. It is configured to be rotatable.

FIG. 3 shows a plan view of the rotor steel plate 5 on the first surface A. FIG. 4 shows a plan view of the rotor steel plate 5 on the second surface B. The first surface A and the second surface B are on the front and back sides of each other. In FIGS. 3 and 4, the permanent magnet 6 is omitted.

As shown in FIG. 3, the through hole 14 of the rotor steel plate 5 is provided with three engaging grooves 16 (first engaging groove 16a, second engaging groove 16b, third engaging groove 16c). There is. The engagement groove centers 18 of the three engagement grooves 16a, 16b, and 16c are arranged at positions corresponding to three of the six magnetic poles in the rotor steel plate 5. The three engaging grooves 16a, 16b, 16c are arranged so that the center 18 of the engaging groove has a predetermined angle with respect to the d-axis. In the first engaging groove 16a, the engaging groove center 18 is arranged so as to coincide with the d-axis, and the deviation angle from the d-axis is 0. In the second engaging groove 16b, the engaging groove center 18 is arranged with a deviation angle of plus a degree with respect to the d-axis. In the third engaging groove 16c, the engaging groove center 18 is arranged with a deviation angle of plus 2a degrees with respect to the d-axis. In this way, the first engaging groove 16a, the second engaging groove 16b, and the third engaging groove 16c are formed so that the deviation angle with respect to the d-axis is different and the deviation angle of the engagement groove center 18 is a degree. Is provided.

In addition, each engaging groove 16 is provided with a small convex portion 17 corresponding to the above positional relationship, and three engaging grooves 16a, 16b, 16c can be discriminated from the position of the small convex portion 17. In the example shown in FIG. 3, in the first engaging groove 16a in which the center 18 of the engaging groove and the d-axis are aligned, one small convex portion 17 is located at the center of the engaging groove 16. In the second engaging groove 16b in which the engaging groove center 18 has a deviation angle of plus a degrees with respect to the d-axis, one small convex portion 17 is arranged at the left end when viewed from the rotation center axis O of the engaging groove 16. doing. In the third engaging groove 16c in which the center 18 of the engaging groove has a deviation angle of plus 2a degrees with respect to the d-axis, two small convex portions 17 are arranged at the left and right ends of the engaging groove 16. Thereby, the three engaging grooves 16a, 16b, 16c can be discriminated by the arrangement of the small convex portion 17.

FIG. 4 shows the front and back sides of the rotor steel plate 5 inverted, and shows a plan view of the rotor steel plate 5 when the second surface B is the front side (upper side). Here, in FIG. 4, the engaging groove 16 on the second surface B in which the second engaging groove 16b is inverted is referred to as an inverted second engaging groove 16d, and the second engaging groove 16c is inverted. The engaging groove 16 on the surface B is referred to as an inverted third engaging groove 16e. On the second surface B, the small convex portion 17 of the first engaging groove 16a can be identified because it is located at the center, and the small convex portion 17 of the inverted second engaging groove 16d is the rotation center axis. It is possible to distinguish from the fact that one is arranged at the left end when viewed from O, and the small convex portion 17 of the inverted third engaging groove 16e is located at both left and right ends when viewed from the center O of the rotation axis. Is possible.

As for the first engaging groove 16a, since the engaging groove center 18 is arranged so as to coincide with the d-axis, the positional relationship with the d-axis does not change even if it is inverted, and there is no deviation angle as shown in FIG. It is in a state. Further, the positional relationship of the small convex portion 17 does not change. Therefore, the first engaging groove 16a is also referred to as the first engaging groove 16a on the second surface B.

On the first surface A, the engagement groove center 18 of the second engagement groove 16b was arranged with a deviation angle of plus a degree with respect to the d-axis. Therefore, as shown in FIG. 4, in the inverted second engaging groove 16d, which is inverted, the engaging groove center 18 is arranged with a deviation angle of minus a degree with respect to the d axis.

On the first surface A, the engagement groove center 18 of the third engagement groove 16c was arranged with a deviation angle of plus 2a degrees with respect to the d-axis. Therefore, as shown in FIG. 4, in the inverted third engaging groove 16e, which is inverted, the engaging groove center 18 is arranged with a deviation angle of minus 2a degrees with respect to the d-axis. ..

Since the through holes 14 and the engaging grooves 16 of the rotor steel plate 5 have the same size and size and have a line-symmetrical shape, they are congruent even if they are turned upside down. Therefore, regardless of whether the first surface A or the second surface B of the rotor steel plate 5 is turned up, each engaging groove 16 (16a, 16b, 16c, 16d, 16e) has a through hole 14 of the rotating shaft 12 and a through hole 14 and 16e. It can be fitted or engaged with the key 12a.

Here, for example, the first rotor block 4a, the second rotor block 4b, the third rotor block 4c, and the fourth rotor block 4d are configured as follows, for example.

1st rotor block 4a: 10 sheets are laminated so that the positions of the first engaging grooves 16a are aligned with the first surface A of the rotor steel plate 5 facing up. The deviation angle with respect to the d-axis is 0 degrees.
2nd rotor block 4b: 10 sheets are laminated so that the positions of the second engaging grooves 16b are aligned with the first surface A of the rotor steel plate 5 facing up. The deviation angle with respect to the d-axis is plus a degree.
3rd rotor block 4c: 10 sheets are laminated so that the first surface A of the rotor steel plate 5 is facing up and the positions of the third engaging grooves 16c are aligned. The deviation angle with respect to the d-axis is plus 2a degrees, that is, twice the deviation angle of the second engaging groove 16b.
4th rotor block 4d: With the second surface B of the rotor steel plate 5 facing up, the positions of the inverted second engaging groove 16d (that is, the front and back inversion of the second engaging groove 16b) are aligned 10 Laminate the sheets. The deviation angle with respect to the d-axis is minus a degree.

If the engaging groove 16 of the rotor block 4 is commonly engaged with the key 12a of the rotating shaft 12 in order, the deviation angles with respect to the d-axis are minus a degree, 0 degree, plus a degree, plus 2a degree. , And so on, it is possible to configure four rotor blocks 4 having four types of deviation angles from the d-axis at intervals of a degree, whereby the rotor core 3 having a four-stage block skew structure can be configured. And the rotor 2 can be configured.

If the first surface A or the second surface B is matched, the rotor steel plates 5 are congruent, so that the positions of the engaging grooves 16 of any of the rotor steel plates 5 are matched to each other. By stacking the sheets, the positions of the other engaging grooves 16 are also in the same state. Therefore, it is not necessary to separately create the rotor blocks 4a, 4b, 4c, and 4d, and the rotor steel plates 5 are laminated by aligning the positions of any of the engaging grooves 16 and engaged with the rotating shaft 12. At that time, the required number of sheets may be taken out while being stacked, and the engaging groove 16 to be engaged with the key 12a may be set to any of the engaging grooves 16a to 16d to be commonly engaged with the key 12a.

As shown in FIGS. 1 to 5, three notches 26 (26a, 26b, 26c) are provided on the outer diameter portion of the rotor steel plate 5, that is, the outer peripheral surface 8 of the rotor block 4. ing. As shown in FIGS. 3 and 4, the cutout portions 26a and 26c are located at the intersection of the outer diameter portion of the rotor steel plate 5 and the d-axis corresponding to the diameter passing through the center line of the first engaging groove 16a. It is located and provided. Further, the notch portion 26b is provided adjacent to the notch portion 26a and having a predetermined angle or distance from the notch portion 26a.

In the rotor core 3, the finished skew angle can be measured by measuring the angle or distance between the notches 26c between the rotor blocks 4a, 4b, 4c, and 4d. Further, this makes it possible to identify a mistake in stacking the rotor blocks 4 and the like. Since the notch portion 26c does not have an adjacent notch portion 26, the notch portion 26c can be visually discriminated.

Here, since the rotor core 3 also includes the inverted rotor block 4, it can be seen only by appearance whether one of the two adjacent notches 26a or 26b is the notch 26a or 26b. It is difficult to distinguish. However, the notch 26a or 26b can be identified by measuring the angle, the distance relationship, etc. of the notches 26a, 26b, 26c in each rotor block 24. Therefore, if the notch 26a or 26b can be identified, the skew angle may be measured using the notch 26a or 26b of each rotor block 24.

As described above, according to the above configuration, one type including the first engaging groove 16a, the second engaging groove 16b, and the third engaging groove 16c having deviation angles from the d-axis at intervals of a degree. If the rotor steel plate 5 of the above is prepared, the rotor core 3 and the rotor 2 having a four-stage block skew can be configured. Therefore, in a rotary electric machine using this, imbalance can be reduced, and mechanical noise and vibration can be suppressed.

Further, according to the above configuration, it is not necessary to prepare various types of rotor steel plates 5 in constructing the rotor core 3 and the rotor 2 having a multi-stage block skew. In the embodiment, if one type of rotor steel plate 5 having the above configuration is prepared, the rotor 2 and the rotor core 3 having a four-stage block skew can be configured. Therefore, it is possible to provide the rotor 2, the rotor core 3, and the rotary electric machine constructed by using the rotor 2, the rotor core 3, and the rotor core 3 having reduced costs.

(Second Embodiment)
Next, the rotor according to the second embodiment will be described with reference to FIG. The rotor 20 shown in FIG. 5 has a four-stage block skew configuration in the first embodiment, whereas the rotor 20 has a five-stage block skew configuration.

In the second embodiment, the configuration of the rotor core 22 constituting the rotor 20 is as follows. That is, the rotor core 22 includes five types of blocks, a first rotor block 24a, a second rotor block 24b, a third rotor block 24c, a fourth rotor block 24d, and a fifth rotor block 24e. There is. Each rotor block 24 is configured as follows. The rotor steel plate 5 is the same as that of the first embodiment.

First rotor block 24a: Ten pieces are laminated so that the first surface A of the rotor steel plate 5 is facing up and the positions of the first engaging grooves 16a are aligned. The deviation angle with respect to the d-axis is 0 degrees.
Second rotor block 24b: Ten pieces are laminated so that the first surface A of the rotor steel plate 5 is facing up and the positions of the second engaging grooves 16b are aligned. The deviation angle with respect to the d-axis is plus a degree.
Third rotor block 24c: Ten pieces are laminated so that the first surface A of the rotor steel plate 5 is facing up and the positions of the third engaging grooves 16c are aligned. The deviation angle with respect to the d-axis is plus 2a degrees, that is, a deviation angle twice that of the second bridge 26b.
4th rotor block 24d: 10 pieces so that the positions of the inverted second engaging groove 16d (that is, the front and back inversion of the second engaging groove 16b) are aligned with the second surface B of the rotor steel plate 5 facing up. Laminate. The deviation angle with respect to the d-axis is minus a degree.
Fifth rotor block 24e: 10 pieces so that the positions of the inverted third engaging groove 16e (that is, the front and back inversion of the third engaging groove 16c) are aligned with the second surface B of the rotor steel plate 5 facing up. Laminate. The deviation angle with respect to the d-axis is minus 2a degrees.

If each of the engaging grooves 16 of the rotor block 4 is commonly engaged with the key 12a of the rotating shaft 12 in order, the deviation angles with respect to the d-axis are minus 2a degrees, minus a degrees, 0 degrees, plus a. It is possible to create a 5-stage block with 5 types of deviation angles from the d-axis at a-degree intervals, such as degrees and plus 2a degrees, and the rotor 20 and rotor core with this 5-stage block skew structure. 22 can be configured.

If the first surface A or the second surface B is matched, the rotor steel plates 5 are congruent, so that the positions of the engaging grooves 16 of any of the rotor steel plates 5 are matched and laminated. For example, the positions of the other engaging grooves 16 are also in the same state. Therefore, it is not necessary to separately create the rotor blocks 24a, 24b, 24c, 24d, and 24e, and the rotor steel plates 5 are laminated by aligning the positions of any of the engaging grooves 16 and are engaged with the rotating shaft 12. At the time of fitting, the required number of stacked rotor steel plates 5 may be taken out in a laminated state, and each of the engaging grooves 16a to 16e may be commonly engaged with the key 12a.

As described above, according to the above configuration, the same effect as that in the first embodiment is obtained. In the second embodiment, if one type of rotor steel plate 5 provided with the first engaging groove 16a, the second engaging groove 16b, and the third engaging groove 16c is prepared, a five-stage block skew is provided. The rotor 20 and the rotor core 22 can be configured. Therefore, it is not necessary to prepare various types of rotor steel plates 5, and it is possible to provide the rotor 20 and the rotor core 22 having a block skew having a five-stage configuration. Therefore, it is possible to provide the rotor 20, the rotor core 22, and the rotary electric machine constructed by using the rotor 20, the rotor core 22, and the rotor core 22 having reduced costs.

When the rotor 20 or the rotor core 22 having a block skew having a larger number of stages is created, the engaging groove 16 is provided in the rotor steel plate 5 provided with the engaging grooves 16a, 16b, 16c. An engaging groove 16 is additionally provided at a position corresponding to the remaining three d-axis (that is, a position between the engaging grooves 16a, 16b, 16c). At that time, three engaging grooves 16 are additionally provided so that the first surface A is turned upside down and the deviation angles from the d-axis are plus 3a degrees, plus 4a degrees, and plus 5a degrees. When the rotor steel plate 5 is inverted, three engaging grooves 16 having a deviation angle from the d-axis of minus 3a degrees, minus 4a degrees, and minus 5a degrees are added to the second surface B. become. Thereby, the engaging groove 16 having a deviation angle of a degree interval from minus 5a degree to plus 5a degree can be formed.

If the rotor steel plate 5 is used, the number of skew steps that can be realized is (the number of engaging grooves 16 having a deviation angle) × 2 + (the number of engaging grooves 16 having no deviation angle), and in this case, 5 It is possible to create a rotor 20 or a rotor core 22 having × 2 + 1 = 11, that is, a maximum of 11 steps of block skew.

According to the above configuration, the deviation angle of the engagement groove 16 from the d-axis is 0 degree (no deviation angle), plus a degree, plus 2a degree, plus 3a degree, plus 4a degree, plus 5a degree. If one type of rotor steel plate 5 having a groove 16 is prepared, the rotor 20 and the rotor core 22 having 11 steps of block skew can be formed. Therefore, in a rotary electric machine using this, imbalance can be reduced, and mechanical noise and vibration can be suppressed. Further, it is not necessary to prepare various types of rotor steel plates 5, and it is possible to provide the rotor 2 and the rotor core 3 having a multi-stage block skew. Therefore, it is possible to provide the rotor 20, the rotor core 22, and the rotary electric machine constructed by using the rotor 20, the rotor core 22, and the rotor core 22 having reduced costs.

The generalization of this is as follows.
Assuming that the number of magnetic poles of the rotor core 22 is n, the number of d-axises is n, and n engaging grooves 16 at positions corresponding to these can be provided. Of these, the deviation angle of one engagement groove 16 is set to 0 degrees (that is, no deviation angle). The remaining (n-1) engagement grooves 16 are provided with a predetermined deviation angle from the d-axis. The engaging groove 16 is provided so as to have a deviation angle of a degree interval as described above. In this case, a deviation angle such as 0 degree, + a degree, + 2a ,,,,, + (n-1) a degree can be provided on the first surface A. When the rotor steel plate 5 is inverted, the engaging groove 16 having a deviation angle of 0 degree, −a degree, -2a ,,,, − (n-1) a degree is provided. When a rotor block is created using the rotor steel plate 5, it is possible to create a maximum of (n-1) × 2 + 1 steps of skew. For example, if the number of magnetic poles is 8 poles, 7 × 2 + 1 = 15, and it is possible to create a rotor 20 and a rotor core 22 having a maximum of 15 skew stages.

According to the above configuration, if one type of rotor steel plate 5 provided with engaging grooves 16 having a plurality of deviation angles at a degree intervals is prepared, the maximum number is (n−) when the number of magnetic poles is n. 1) A rotor 20 and a rotor core 22 having a block skew of × 2 + 1 steps can be configured. Therefore, it is not necessary to prepare various types of rotor steel plates 5, and it is possible to provide the rotor 20 and the rotor core 22 having a multi-stage block skew. Therefore, it is possible to provide the rotor 20, the rotor core 22, and the rotary electric machine constructed by using the rotor 20, the rotor core 22, and the rotor core 22 having reduced costs.

In the above embodiment, the rotor steel plate, the rotor core, and the rotor core used in the IPM type rotary electric machine have been described as examples of the rotary electric machine, but the present invention is not limited thereto. For example, it may be used for an SPM (Surface Permanent Magnet) type rotary electric machine. Further, the rotary electric machine is not limited to the motor, and may be used for a generator.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

2, 20 ... Rotor, 3, 22 ... Rotor iron core, 4, 24 ... Rotor block, 4a ... First rotor block, 4b ... Second rotor block, 4c ... Third rotor block, 4d ... No. 4 Rotor block, 5 ... Rotor steel plate, 12 ... Rotor shaft, 12a ... Key, 14 ... Through hole, 16 ... Engagement groove, 16a ... First engagement groove, 16b ... Second engagement groove, 16c ... First 3 engaging groove, inverted second engaging groove 16d, inverted third engaging groove 16e, 24a ... first rotor block, 24b ... second rotor block, 24c ... third rotor block, 24d ... fourth rotation Child block, 24e ... 5th rotor block, O ... center of rotation axis, A ... 1st surface, B ... 2nd surface B

Claims (5)

It constitutes the rotor core and
Through holes provided around the center of the rotation axis and
The first engaging groove is an engaging groove provided so as to form a part of the through hole, and the deviation angle from the d-axis is 0 degrees on the same surface, and the deviation angle from the d-axis is At least a second engaging groove having a first angle and a third engaging groove having a deviation angle from the d-axis having a second angle are provided.
The second angle, are two Baidea the first angle,
The first notch and the second notch provided at the two intersections of the d-axis and the outer diameter portion of the rotor steel plate are adjacent to the first notch and have a predetermined angle or A rotor steel plate having a third notch provided at a distance. Through holes provided around the center of the rotation axis and
The first engaging groove is an engaging groove provided so as to form a part of the through hole, and the deviation angle from the d-axis is 0 degrees on the same surface, and the deviation angle from the d-axis is At least a second engaging groove having a first angle and a third engaging groove having a deviation angle from the d-axis having a second angle are provided.
The second angle is a rotor configured by using a rotor steel plate that is twice the first angle.
A rotating shaft with a key and
A first rotor block made of a plurality of rotor steel plates in which the first engaging groove engages with the key,
A second rotor block made of a plurality of rotor steel plates in which the second engaging groove engages with the key,
A third rotor block made of a plurality of rotor steel plates in which the third engaging groove engages with the key,
In a state where the rotor steel plate is inverted, at least a fourth rotor block composed of a plurality of rotor steel plates in which the engagement groove corresponding to the second engagement groove engages with the key is provided.
The first rotor block, the second rotor block, the third rotor block, and the fourth rotor block have a first angle, 0 degree, and a positive first angle with a negative deviation angle from the d-axis. , The keys are engaged in the order of the positive second angle, and the rotor steel plate having the same shape is used to provide a block skew structure having a larger number of engagement grooves than the number of engagement grooves provided in the rotor steel plate. Rotor. A rotary shaft having a key and a rotor steel plate having a first surface and a second surface and having a plurality of engaging grooves capable of engaging with the key are provided, and the plurality of the rotor steel plates are laminated to form the rotary shaft. In a rotor configured by fitting to
The rotor steel plate is arranged at any position corresponding to the d-axis of the rotor steel plate, and includes a plurality of the engaging grooves having deviation angles of predetermined angular intervals with respect to the d-axis, and the rotation A predetermined number of slaves are engaged with the key of the rotating shaft about a predetermined number of engaging grooves in the rotor steel plate on the first surface, and the child engages with the key in the rotor steel plate on the second surface. By engaging a predetermined number of grooves with each other, a plurality of stages of block skews configured at the predetermined angular intervals are provided.
The rotor steel plate includes a first notch portion and a second notch portion provided at two intersections of any one of the d-axis and the outer diameter portion of the rotor steel plate. , A rotor having a third notch, which is adjacent to the second notch and is provided at a predetermined angle. In a rotor steel plate having n d-axis and having a first surface and a second surface, the rotor steel plate is arranged at any position corresponding to the d-axis of the rotor steel plate, and the deviation angle with respect to the d-axis is 0 degrees. When the rotor steel plate is inverted while being provided with a mating groove and a plurality of engaging grooves having a deviation angle of a degree from a degree to (n-1) a degree at intervals of a degree with respect to the d-axis. , In a rotor configured by laminating a plurality of the rotor steel plates having engagement grooves having a deviation angle of minus a degree to minus (n-1) a degree at intervals of a degree with respect to the d-axis. ,
A rotating shaft having a key that can be engaged with the engaging groove is provided.
A predetermined number of the rotor steel plates configured to be commonly engaged with any of the predetermined engagement grooves in the rotor steel plate on the first surface, and a predetermined number of rotor steel plates on the second surface. A predetermined number of rotor steel plates configured to be commonly engaged with any of the engaging grooves are engaged with the key in each of the engaging grooves, so that an angle interval of a degree is provided. Equipped with a multi-stage block skew composed of
A block in which a plurality of rotor steel plates are laminated is engaged with the key in the order in which the deviation angle from the d-axis is deviated from minus (n-1) a degree to (n-1) a degree at intervals of a degree, and is the same. A rotor having a block skew structure that is larger than the number of engaging grooves provided in the rotor steel plate by using the rotor steel plate having the shape. The rotor steel plate includes a first notch and a second notch provided at two intersections of any one of the d-axis and the outer diameter portion of the rotor steel plate. The rotor according to claim 2 or 4, further comprising a third notch provided adjacent to the second notch and provided at a predetermined angle.

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