JP2016192841A - Switched reluctance rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switched reluctance rotating machine capable of improving performance by high magnetic flux density in a salient pole of a rotor.SOLUTION: A switched reluctance motor 1 includes: a rotor 10 with a plurality of rotor salient poles 12, 13 on an outer peripheral surface 11a and an inner peripheral surface 11b; an outer stator 20 and an inner stator 30 with a plurality of coils 23, 33 capable of facing the rotor salient poles 12, 13 in the radial direction of the rotor 10. The rotor 10 has a plurality of core pieces 40 continuous to each other in the peripheral direction. Each of the core pieces 40 has magnetic anisotropy with easy direction of magnetization preset toward the outer stator 20 and the inner stator 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a switched reluctance rotating machine.

  The switched reluctance rotating machine has a configuration in which a rotor does not have permanent magnets or windings and operates by a magnetic attractive force generated between the rotor and the stator. Switched reluctance rotating machines have problems such as vibration and noise in principle, but the structure is simple and robust, can withstand high-speed rotation, and expensive permanent magnets such as neodymium magnets are unnecessary. In recent years, research and development for practical application of a rotating machine with low cost and excellent reliability has been promoted. As such a switched reluctance rotating machine, for example, a reluctance motor described in Patent Document 1 below is known.

JP-A-5-336715

  By the way, in the rotor of the reluctance type electric motor, since the direction in which the magnetic flux flows changes with rotation, it is common knowledge to use a non-oriented electrical steel sheet for the rotor core. However, even a material called a non-oriented electrical steel sheet actually has magnetic anisotropy. The core having magnetic anisotropy has a high saturation magnetic flux density in the easy magnetization direction, but has a low saturation magnetic flux density perpendicular to the easy magnetization direction. For this reason, for example, in a specific salient pole provided in the rotor, the magnetic resistance of the magnetic path is increased in the perpendicular direction, and thus there is a limit to improving the performance by increasing the magnetic flux density in the salient pole of the rotor.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a switched reluctance rotating machine capable of improving performance by increasing the magnetic flux density in the salient poles of the rotor.

  In order to solve the above problems, the present invention provides a switched having a rotor having a plurality of salient poles on a peripheral surface and a stator having a plurality of coils that can face the salient poles in the radial direction of the rotor. The reluctance rotating machine has a configuration in which the rotor has a plurality of core pieces continuous in a circumferential direction, and the core pieces have magnetic anisotropy in which an easy magnetization direction is set toward the stator. adopt.

  In the present invention, the easy magnetization direction is set within a range in which an angle with respect to a reference line parallel to an axis of symmetry passing through the center of the core piece in the radial direction of the rotor is ± 45 degrees. The configuration is adopted.

  In the present invention, the easy magnetization direction is set within a range in which an angle with respect to a reference line parallel to an axis of symmetry passing through the center of the core piece in the radial direction of the rotor is ± 22.5 degrees. Is adopted.

  In the present invention, the core piece has a plurality of salient poles and a dividing surface formed in the radial direction of the rotor, and the plurality of core pieces have the dividing surface in the axial direction. The phase of the salient poles is shifted in the circumferential direction so as not to be continuous, and the core pieces are stacked in the axial direction, and the plurality of salient poles of the core piece are center lines passing through the centers of the salient poles in the radial direction of the rotor Is adopted that the angle with respect to the easy magnetization direction is set within a range of ± 45 degrees.

  In the present invention, the rotor is formed in an annular shape having a plurality of salient poles on an inner peripheral surface and an outer peripheral surface, and the stator is provided on the inner peripheral surface in a radial direction of the rotor. An inner stator having a plurality of coils that can be opposed to the salient poles, and an outer stator having a plurality of coils that can be opposed to the salient poles provided on the outer peripheral surface in the radial direction of the rotor. At least one of the stator and the outer stator has a plurality of core pieces that are continuous in the circumferential direction, and the core pieces have a magnetic anisotropy in which an easy magnetization direction is set toward the rotor. Is adopted.

According to the present invention, the rotor of the switched reluctance rotating machine is divided into a plurality of core pieces. The plurality of core pieces are continuous in the circumferential direction and have magnetic anisotropy in which an easy magnetization direction is set toward the stator. Thus, by making the rotor into a divided structure, the easy magnetization direction can be set for each core piece, and by setting the easy magnetization direction toward the stator, a high magnetic flux density in all salient poles of the rotor. Can be achieved.
Therefore, according to the present invention, a switched reluctance rotating machine capable of improving performance by increasing the magnetic flux density in the salient poles of the rotor is obtained.

It is sectional drawing which shows the switched reluctance motor in 1st Embodiment of this invention. It is a figure which shows the easy magnetization direction of the core piece in 1st Embodiment of this invention. It is a graph which shows the relationship between the angle with respect to the reference line of the easy magnetization direction in 1st Embodiment of this invention, and motor performance. It is a perspective view which shows the laminated structure of the rotor in 2nd Embodiment of this invention. It is a figure which shows the easy magnetization direction of the core piece in 2nd Embodiment of this invention. It is a figure which shows the easy magnetization direction of the core piece in the modification of 2nd Embodiment of this invention. It is a figure which shows the easy magnetization direction of the core piece in the modification of 2nd Embodiment of this invention. It is sectional drawing which shows the switched reluctance motor in 3rd Embodiment of this invention.

  The switched reluctance rotating machine of the present invention will be described below with reference to the drawings. In the following description, a switched reluctance motor is exemplified as the switched reluctance rotating machine.

(First embodiment)
FIG. 1 is a cross-sectional view showing a switched reluctance motor 1 according to a first embodiment of the present invention.
As shown in FIG. 1, the switched reluctance motor 1 has a double stator structure including a rotor 10, an outer stator 20 (stator), and an inner stator 30 (stator). The switched reluctance motor 1 is a U-phase, V-phase, and W-phase three-phase motor, and has a three-phase 12 / 8-pole structure with 12 poles on the stator side and 8 poles on the rotor side. Yes.

  The rotor 10 is a magnetic body in which, for example, a plurality of directional electromagnetic steel plates are laminated in the axial direction (the direction perpendicular to the paper surface in FIG. 1). The standard for grain-oriented electrical steel sheets conforms to the JIS standard. The rotor 10 includes a rotor yoke 11 and rotor salient poles 12 and 13 (saliency poles). The rotor yoke 11 is formed in an annular shape.

  A plurality of rotor salient poles 12 are provided on the outer peripheral surface 11 a of the rotor yoke 11. Eight rotor salient poles 12 are provided on the outer peripheral surface 11a at intervals of 45 degrees (deg). A plurality of rotor salient poles 13 are provided on the inner peripheral surface 11 b of the rotor yoke 11. The rotor salient poles 13 are provided in the same phase as the rotor salient poles 12 on the inner peripheral surface 11b at intervals of 45 degrees (deg).

  The rotor yoke 11 is provided with a plurality of fastening rod insertion holes 14. The eight fastening rod insertion holes 14 are provided in the rotor yoke 11 with the same phase as the rotor salient poles 12 and 13 at intervals of 45 degrees (deg). The fastening rod insertion hole 14 penetrates in the axial direction, and a fastening rod (not shown) is inserted therein. The fastening rod is connected to a ring-shaped rotor holder (not shown) and fastens the rotor 10 in the axial direction.

  The outer stator 20 is disposed outside the rotor 10. The outer stator 20 includes a stator yoke 21, a stator salient pole 22, and a coil 23. The stator yoke 21 is formed from a non-oriented electrical steel sheet, for example. The standard for non-oriented electrical steel sheets conforms to the JIS standard. The stator yoke 21 is formed in an annular shape. The stator salient pole 22 is provided integrally with the stator yoke 21.

  The stator salient poles 22 project in the radial direction from the stator yoke 21 toward the inside. Twelve stator salient poles 22 are provided at an interval of 30 degrees (deg) on the inner periphery of the stator yoke 21. The coil 23 faces the rotor salient pole 12 in the radial direction of the rotor 10. The coil 23 is wound around each of the stator salient poles 22 using a slot opening formed between the stator salient poles 22 adjacent in the circumferential direction. The coils 23 are arranged in the order of U phase → V phase → W phase → U phase →... Along the circumferential direction.

  The inner stator 30 is disposed inside the rotor 10. The inner stator 30 includes a stator yoke 31, a stator salient pole 32, and a coil 33. The stator yoke 31 is formed from, for example, a non-oriented electrical steel sheet. The stator yoke 31 is formed in an annular shape. The stator salient pole 32 is provided integrally with the stator yoke 31.

  The stator salient poles 32 protrude in the radial direction from the stator yoke 31 toward the outside. Twelve stator salient poles 32 are provided on the inner periphery of the stator yoke 31 at intervals of 30 degrees (deg). The coil 33 faces the rotor salient pole 13 in the radial direction of the rotor 10. The coil 33 is wound around each of the stator salient poles 32 using a slot opening formed between the stator salient poles 32 adjacent in the circumferential direction. The coils 33 are arranged in the order of U phase → V phase → W phase → U phase →... Along the circumferential direction.

  The coils 23 and 33 are supplied with a three-phase alternating current as a drive current from a motor drive device (not shown). The motor drive device includes, for example, a DC power supply, an inverter that converts DC current into AC current and supplies the coils 23 and 33, a booster circuit provided between the DC power supply and the inverter, and an output voltage of the booster circuit. And a smoothing capacitor for smoothing. When power is supplied to the coils 23 and 33, a magnetic field is formed by the coils 23 and 33, and torque is applied to the rotor 10 by the magnetic field acting on the rotor salient poles 12 and 13.

  As shown in FIG. 1, the rotor 10 includes a core piece 40 that is continuous in the circumferential direction. The core piece 40 includes a plurality of rotor salient poles 12 and 13 and a dividing surface 40 a formed in the radial direction of the rotor 10. The core piece 40 of the present embodiment is obtained by dividing the rotor 10 into four parts in the circumferential direction and has two rotor salient poles 12 and 13. The dividing surface 40 a is formed on the rotor yoke 11 and extends along the radial direction of the rotor 10.

FIG. 2 is a diagram showing the easy magnetization direction 50 of the core piece 40 in the first embodiment of the present invention.
The core piece 40 has magnetic anisotropy in which an easy magnetization direction 50 is set toward the outer stator 20 and the inner stator 30. The core piece 40 is formed from a grain-oriented electrical steel sheet, and more preferably is formed from a unidirectional electrical steel sheet having one easy magnetization direction 50. The easy magnetization direction 50 of the unidirectional electrical steel sheet is substantially the same as the rolling direction of the steel sheet.

  The easy magnetization direction 50 is preferably set within a range in which the angle θ with respect to the reference line 51 parallel to the symmetry axis passing through the center of the core piece 40 in the radial direction of the rotor 10 is ± 45 degrees (deg). . More preferably, the easy magnetization direction 50 is set within a range in which the angle θ with respect to the reference line 51 parallel to the symmetry axis passing through the center of the core piece 40 in the radial direction of the rotor 10 is ± 22.5 degrees (deg). It is preferable that In the easy magnetization direction 50 of the core piece 40 shown in FIG. 2, the angle with respect to the reference line 51 is set to 0 degree (deg).

FIG. 3 is a graph showing the relationship between the angle θ with respect to the reference line 51 in the easy magnetization direction 50 and the motor performance in the first embodiment of the present invention. In FIG. 3, the vertical axis represents efficiency (%), and the horizontal axis represents torque (pu: Per Unit.).
FIG. 3 shows static magnetic field analysis results when the angle θ of the easy magnetization direction 50 with respect to the reference line 51 is changed in a step of 11.25 degrees (deg) in the range of 0 to 45 degrees (deg). Moreover, in FIG. 3, the analysis result of the isotropic core piece which does not have magnetic anisotropy is shown as a comparative example. In FIG. 3, the analysis result when the angle θ with respect to the reference line 51 in the easy magnetization direction 50 is stepped to the − side is not shown because it is the same as the analysis result when the step is moved to the + side.

  As shown in FIG. 3, when the angle θ of the easy magnetization direction 50 with respect to the reference line 51 is in a range of 0 to 45 degrees (deg), on the high torque side, all are compared with the isotropic core piece. It can be seen that it has high efficiency. In addition, when the angle θ of the easy magnetization direction 50 with respect to the reference line 51 is within a range of 0 to 22.5 degrees (deg), it is significantly more than 33.75 degrees (deg) and 45 degrees (deg). It can be seen that it has high efficiency. Moreover, it turns out that 0 degree (deg) has comparatively high efficiency compared with others in 0-22.5 degree (deg).

  From the analysis results shown in FIG. 3, the easy magnetization direction 50 is within a range in which the angle θ with respect to the reference line 51 parallel to the symmetry axis passing through the center of the core piece 40 in the radial direction of the rotor 10 is ± 45 degrees (deg). Is preferably set within a range of ± 22.5 degrees (deg), and most preferably is set to 0 degrees (deg). preferable.

As described above, in the present embodiment, the rotor 10 having the plurality of rotor salient poles 12 and 13 on the outer peripheral surface 11 a and the inner peripheral surface 11 b and the plurality of rotor salient poles 12 and 13 that can face the rotor salient poles 12 and 13 in the radial direction of the rotor 10. The switched reluctance motor 1 having the outer stator 20 and the inner stator 30 having the coils 23 and 33, and the rotor 10 includes a plurality of core pieces 40 that are continuous in the circumferential direction. A configuration is adopted in which magnetic easy anisotropy direction 50 is set toward stator 20 and inner stator 30. According to this configuration, the rotor 10 can be divided into a plurality of core pieces 40 in the circumferential direction, and the easy magnetization direction 50 can be set for each core piece 40. For this reason, the easy magnetization direction 50 can be set toward the outer stator 20 and the inner stator 30 for each core piece 40, and a high magnetic flux density can be achieved in all the rotor salient poles 12 and 13 of the rotor 10.
Therefore, in the present embodiment, the switched reluctance motor 1 that can improve the performance by increasing the magnetic flux density in the rotor salient poles 12 and 13 is obtained.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

FIG. 4 is a perspective view showing a laminated structure of the rotor 10A in the second embodiment of the present invention.
As shown in FIG. 4, in the rotor 10 </ b> A of the second embodiment, the plurality of core pieces 40 that are continuous in the circumferential direction have the phases of the rotor salient poles 12, 13 in the circumferential direction so that the split surfaces 40 a are not continuous in the axial direction. They are staggered and stacked in the axial direction.

  The rotor 10 </ b> A is configured by alternately stacking first layers 41 and second layers 42 formed by a plurality of core pieces 40 extending in the circumferential direction in the axial direction. Here, the 1st layer 41 and the 2nd layer 42 are laminated so that a phase may shift mutually in the peripheral direction. Specifically, one of the fastening rod insertion holes 14 provided in the core piece 40 of the first layer 41 (for example, the fastening rod insertion hole 14b) is connected to the fastening rod insertion hole 14 provided in the core piece 40 of the second layer 42. The first layer 41 and the second layer 42 are stacked so as to be out of phase with each other in the circumferential direction so as to face the other (for example, the fastening rod insertion hole 14a).

According to this configuration, when a fastening rod (not shown) is inserted into each of the fastening rod insertion holes 14 in the axial direction, the core piece 40 of the first layer 41 and the core piece 40 of the second layer 42 are in the circumferential direction. And are connected and integrated in the axial direction. Thereby, the dividing surface 40a formed by combining the core pieces 40 in the circumferential direction does not continue in the axial direction, and the physical strength of the rotor 10A can be increased.
In the rotor 10A configured as described above, the first layer 41 and the second layer 42 have different easy magnetization directions 50 in the rotor salient poles 12 and 13. For this reason, the easy magnetization direction 50 of the core piece 40 is set as shown in FIG.

FIG. 5 is a diagram showing the easy magnetization direction 50 of the core piece 40 in the second embodiment of the present invention.
The core piece 40 shown in FIG. 5 has an 8-pole quadruple structure, and has two rotor salient poles 12 and 13. The core piece 40 is transposed by shifting the phase of the rotor salient poles 12 and 13 by 45 degrees (deg) between the first layer 41 and the second layer 42.

  In the easy magnetization direction 50 of the core piece 40, an angle θ with respect to a reference line 51 (not shown in FIG. 5) is set to 0 degrees (deg). According to this configuration, in the core piece 40 of the first layer 41, the center line 52 that passes through the rotor salient poles 12 and 13 (for example, the rotor salient poles 12 and 13 on the fastening rod insertion hole 14b side) in the radial direction of the rotor 10A. The angle with respect to the easy magnetization direction 50 is −22.5 degrees (deg).

  In the core piece 40 of the second layer 42, the easy magnetization direction of the center line 52 passing through the rotor salient poles 12 and 13 (for example, the rotor salient poles 12 and 13 on the fastening rod insertion hole 14a side) in the radial direction of the rotor 10A. The angle with respect to 50 is 22.5 degrees (deg). Then, the magnetic characteristics of the rotor salient poles 12 and 13 are determined by the magnetic characteristics having an angle θ of 22.5 degrees (deg). That is, when the angle θ of the easy magnetization direction 50 with respect to the reference line 51 is 22.5 degrees (deg), as shown in FIG. 3, the efficiency is higher than that of the isotropic core piece. Therefore, the magnetic flux density in the rotor salient poles 12 and 13 can be increased, and the motor performance can be improved.

FIG. 6 is a diagram showing the easy magnetization direction 50 of the core piece 40 in a modification of the second embodiment of the present invention.
The core piece 40 </ b> A shown in FIG. 6 has an eight-pole / four-part structure, and has two rotor salient poles 12 and 13. The core piece 40A is rolled by the first layer 41 and the second layer 42 with the phases of the rotor salient poles 12 and 13 shifted by 45 degrees (deg).

  In the easy magnetization direction 50 of the core piece 40A, the angle θ with respect to the reference line 51 is set to 22.5 degrees (deg). According to this configuration, in the core piece 40A of the first layer 41, the center line 52 passing through the rotor salient poles 12 and 13 (for example, the rotor salient poles 12 and 13 on the fastening rod insertion hole 14b side) in the radial direction of the rotor 10A. The angle with respect to the easy magnetization direction 50 is −45 degrees (deg).

  In the core piece 40A of the second layer 42, the easy magnetization direction of the center line 52 passing through the rotor salient poles 12 and 13 (for example, the rotor salient poles 12 and 13 on the fastening rod insertion hole 14a side) in the radial direction of the rotor 10A. The angle with respect to 50 is 0 degree (deg). Then, the magnetic characteristics of the rotor salient poles 12 and 13 are determined by the average value of the magnetic characteristics when the angle θ is 0 degrees (deg) and 45 degrees (deg). That is, when the angle θ of the easy magnetization direction 50 with respect to the reference line 51 is 0 degree (deg) and 45 degrees (deg), as shown in FIG. 3, both have higher efficiency than the isotropic core piece. Have Therefore, the magnetic flux density in the rotor salient poles 12 and 13 can be increased, and the motor performance can be improved.

FIG. 7 is a diagram showing the easy magnetization direction 50 of the core piece 40 in a modification of the second embodiment of the present invention.
The core piece 40B shown in FIG. 7 has a 12-pole quadruple structure, and has three rotor salient poles 12 and 13 each. The core piece 40B has three fastening rod insertion holes 14a to 14c. The core piece 40B is transposed with the first layer 41 and the second layer 42 with the phases of the rotor salient poles 12 and 13 shifted by 30 degrees (deg).

  In the easy magnetization direction 50 of the core piece 40B, the angle θ with respect to the reference line 51 is set to 0 degree (deg). According to this configuration, in the core piece 40B of the first layer 41, the center line 52 that passes through the rotor salient poles 12 and 13 (for example, the rotor salient poles 12 and 13 on the fastening rod insertion hole 14c side) in the radial direction of the rotor 10A. The angle with respect to the easy magnetization direction 50 is −30 degrees (deg).

  In the core piece 40B of the second layer 42, the easy magnetization direction of the center line 52 passing through the rotor salient poles 12 and 13 (for example, the rotor salient poles 12 and 13 on the fastening rod insertion hole 14b side) in the radial direction of the rotor 10A. The angle with respect to 50 is 0 degree (deg). Then, the magnetic characteristics of the rotor salient poles 12 and 13 are determined by the average value of the magnetic characteristics when the angle θ is 0 degrees (deg) and 30 degrees (deg). That is, when the angle θ of the easy magnetization direction 50 with respect to the reference line 51 is smaller than the absolute value of 45 degrees (deg), the efficiency is higher than that of the isotropic core piece as shown in FIG. Therefore, the magnetic flux density in the rotor salient poles 12 and 13 can be increased, and the motor performance can be improved.

  As described above, in the second embodiment, the core piece 40 includes the plurality of rotor salient poles 12 and 13 and the dividing surface 40a formed in the radial direction of the rotor 10, and the plurality of core pieces 40 includes The rotor salient poles 12 and 13 are laminated in the axial direction so that the divided surfaces 40a are not continuous in the axial direction, and the plurality of rotor salient poles 12 and 13 included in the core piece 40 are rotors. By adopting a configuration in which the angle of the center line 52 passing through the centers of the rotor salient poles 12 and 13 with respect to the easy magnetization direction 50 in the 10 radial directions is set within a range of ± 45 degrees, the rotor salient poles are adopted. It is possible to increase the magnetic flux density at 12 and 13 and improve the motor performance.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

FIG. 8 is a cross-sectional view showing a switched reluctance motor 1A according to a third embodiment of the present invention.
As shown in FIG. 8, in the switched reluctance motor 1A of the third embodiment, the outer stator 20 has a divided structure having a plurality of core pieces 60 that are continuous in the circumferential direction.

  The core piece 60 includes the stator salient poles 22 and a dividing surface 60 a formed in the radial direction of the rotor 10. The core piece 60 is obtained by dividing the outer stator 20 into 12 parts in the circumferential direction, and has one stator salient pole 22. The dividing surface 60 a is formed on the stator yoke 21 and extends along the radial direction of the rotor 10.

The core piece 60 has magnetic anisotropy in which an easy magnetization direction is set toward the rotor 10. That is, the core piece 60 is formed from a unidirectional electrical steel sheet, and the easy magnetization direction is set along the radial direction of the rotor 10.
According to the third embodiment having the above-described configuration, not only the rotor 10 but also the outer stator 20 has magnetic anisotropy. Therefore, it is possible to improve performance by increasing the magnetic flux density in the stator salient poles 22 of the outer stator 20.

Here, the division number of the rotor 10 and the outer stator 20 can be determined within the following range regardless of the number of phases of the switched reluctance motor 1A.
The division number n _r of the rotor 10 is determined by the relational expression (1) when the number of poles of the rotor salient poles 12 and 13 is N _r .
4 ≦ n _r ≦ N _r / 2 (1)
Further, the division number n _s of the outer stator 20, the number of poles of the stator salient poles 22 when the N _s, is determined by the relational expression (2).
4 ≦ n _s ≦ N _s (2)

For example, the rotor 10 of the third embodiment satisfies the relational expression (1) because the number of poles of the rotor salient poles 12 and 13 is 8 and the number of divisions of the rotor 10 is 4. For example, in the outer stator 20 of the third embodiment, the number of stator salient poles 22 is 12, and the number of divisions of the outer stator 20 is 12. Therefore, the relational expression (2) is satisfied.
As described above, the number of divisions of the rotor 10 and the outer stator 20 is independent, and each combination can be freely selected. In addition, as what does not satisfy | fill the said relational expression, there exists a 3 phase 6/4 pole structure which is a general switched reluctance motor, and a 4 phase 8/6 structure.

  In the third embodiment, the outer stator 20 has a divided structure, but the inner stator 30 may have a divided structure, and both the outer stator 20 and the inner stator 30 may have a divided structure. The number of divisions of the inner stator 30 is determined by the relational expression (2), similarly to the number of divisions of the outer stator 20.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the above embodiment, a grain-oriented electrical steel sheet is adopted as a core piece having magnetic anisotropy, but the present invention is not limited to this configuration, and even a material called a non-oriented electrical steel sheet is actually used. Since magnetic anisotropy exists, a non-oriented electrical steel sheet may be adopted as the core piece if the easy magnetization direction is set toward the stator.

  Further, for example, in the above embodiment, a switched reluctance rotating machine having a double stator structure is illustrated, but the present invention is not limited to this configuration, and may be applied to a switched reluctance rotating machine having a single stator structure. it can. As the switched reluctance rotating machine having a single stator structure, any of an inner rotor structure and an outer rotor structure can be applied.

  Further, for example, in the above embodiment, the switched reluctance rotating machine of the present invention is exemplified for the configuration applied to the motor, but the present invention is not limited to this configuration and can also be applied to the generator. . Moreover, in a generator, it can apply suitably for a large sized wind generator.

1,1A Switched reluctance motor (Switched reluctance rotating machine)
10, 10A Rotor 11a Outer peripheral surface 11b Inner peripheral surface 12 Rotor salient pole (saliency pole)
13 Rotor salient pole
14 (14a-14c) Fastening rod insertion hole 20 Outer stator (stator)
23 Coil 30 Inner stator (stator)
33 Coil 40, 40A, 40B Core piece 40a Dividing surface 50 Easy magnetization direction 51 Reference line 52 Center line 60 Core piece

Claims (5)

A switched reluctance rotating machine having a rotor having a plurality of salient poles on a peripheral surface, and a stator having a plurality of coils that can face the salient poles in the radial direction of the rotor,
The rotor has a plurality of core pieces continuous in the circumferential direction,
The switched reluctance rotating machine, wherein the core piece has magnetic anisotropy in which an easy magnetization direction is set toward the stator.   2. The easy magnetization direction is set such that an angle with respect to a reference line parallel to an axis of symmetry passing through the center of the core piece in a radial direction of the rotor is set within a range of ± 45 degrees. Switched reluctance rotating machine described in 1.   In the easy magnetization direction, an angle with respect to a reference line parallel to an axis of symmetry passing through the center of the core piece in the radial direction of the rotor is set within a range of ± 22.5 degrees. Item 2. The switched reluctance rotating machine according to item 1. The core piece has a plurality of salient poles and a dividing surface formed in a radial direction of the rotor,
The plurality of core pieces are laminated in the axial direction by shifting the phase of the salient poles in the circumferential direction so that the divided surfaces are not continuous in the axial direction,
In the plurality of salient poles of the core piece, the angle of the center line passing through the center of the salient pole in the radial direction of the rotor with respect to the easy magnetization direction is set within a range of ± 45 degrees. The switched reluctance rotating machine according to claim 3. The rotor is formed in an annular shape having a plurality of salient poles on an inner peripheral surface and an outer peripheral surface,
The stator is
An inner stator having a plurality of coils that can be opposed to the salient poles provided on the inner circumferential surface in the radial direction of the rotor;
An outer stator having a plurality of coils that can be opposed to the salient poles provided on the outer circumferential surface in the radial direction of the rotor,
At least one of the inner stator and the outer stator has a plurality of core pieces continuous in the circumferential direction,
5. The switched reluctance rotating machine according to claim 1, wherein the core piece has a magnetic anisotropy in which an easy magnetization direction is set toward the rotor.

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