JP6675139B2 - Switch reluctance motor - Google Patents

Description

  The present invention relates to a switched reluctance motor.

  Conventionally, a switch reluctance motor (hereinafter, also referred to as an SR motor) is known as one of the motors not using a permanent magnet. Since the SR motor does not cause a problem such as thermal demagnetization of the permanent magnet, it can be used even in a severe environment such as a high temperature.

  For example, Patent Document 1 discloses an SR motor including a stator including six stator magnetic poles and a rotor disposed inside the stator. The rotor of this SR motor has a boss made of a non-magnetic metal and two soft magnetic segments fixed to the outer peripheral surface of the boss. The width of each soft magnetic segment is twice as long as the sum of the width of the stator poles and the distance between the stator poles. With such a configuration, when the SR motor is driven, a magnetic path connecting two adjacent stator poles via one of the soft magnetic segments is formed.

JP 2010-81782 A

  As described above, in the rotor of the SR motor disclosed in Patent Document 1, the boss portion of the non-magnetic metal is disposed between the two soft magnetic segments. For this reason, the lines of magnetic force entering the soft magnetic segment from a certain stator pole go to the adjacent stator pole without crossing the boss. That is, in the rotor of Patent Document 1, the magnetic flux passes only through the soft magnetic segment and does not pass through the boss. The thickness of each soft magnetic segment is limited by the boss. Therefore, in the rotor of Patent Document 1, it is difficult to secure a large amount of magnetic flux when driving the SR motor, and magnetic saturation is likely to occur.

  Further, in the SR motor of Patent Document 1, a fixing member such as a protection ring needs to be provided around the rotor in order to surely prevent the soft magnetic segment from coming off the boss portion. In this case, the gap between the stator and the rotor increases, and the magnetic resistance based on this gap increases. Therefore, the SR motor of Patent Document 1 is not suitable for high-speed rotation.

  Therefore, an object of the present invention is to provide a switched reluctance motor capable of preventing occurrence of magnetic saturation in a rotor and capable of rotating at high speed.

  A switch reluctance motor according to the present invention includes a rotor including a rotor body, two rotor teeth formed integrally with the rotor body and projecting radially outward of the rotor body, and a yoke disposed around the rotor. And a stator core including six stator teeth projecting inward from the yoke, and a winding wound around each of the six stator teeth and supplied with one of a U-phase current, a V-phase current, and a W-phase current. And. The rotor body and the two rotor teeth are formed of a magnetic material. The rotor or the stator core is skewed. When the rotor is skewed, the positions of the two rotor teeth are shifted in the circumferential direction of the rotor. When the skew is given to the stator core, the positions of the six stator teeth are shifted in the circumferential direction of the stator core. When one of the two rotor teeth faces one stator tooth, the other faces the other stator tooth.

  In the above switched reluctance motor, both the rotor body and the two rotor teeth are formed of a magnetic material. When one rotor tooth faces one stator tooth, the other rotor tooth faces another stator tooth. For this reason, when driving the motor, the lines of magnetic force from the stator teeth cross one rotor tooth, the rotor body, and the other rotor tooth. As described above, in the above-described switched reluctance motor, the amount of magnetic flux passing through the rotor is not limited by the rotor body, so that a larger amount of magnetic flux can be secured. Therefore, occurrence of magnetic saturation in the rotor can be suppressed.

  In the above-described switch reluctance motor, two rotor teeth are formed integrally with the rotor body. According to this configuration, separation of the rotor body and each rotor tooth can be suppressed without providing a protection ring or the like around the rotor. Therefore, the gap between the stator core and the rotor can be reduced, and the increase in magnetic resistance can be suppressed. Therefore, the switch reluctance motor can be rotated at a high speed.

  In the above switched reluctance motor, the winding may be wound around each of the six stator teeth in a concentrated winding manner. According to this configuration, it is possible to reduce the size and cost of the motor.

  According to the present invention, the occurrence of magnetic saturation in the rotor can be prevented, and the motor can be rotated at high speed.

FIG. 1 is a horizontal sectional view schematically showing a switched reluctance motor according to an embodiment of the present invention. FIG. 2 is a horizontal end view schematically showing a rotor used in the switched reluctance motor according to the embodiment. FIG. 3A is a perspective view schematically showing a rotor that can be used in the switched reluctance motor according to the embodiment. FIG. 3B is a perspective view schematically showing a rotor in a mode different from FIG. 3A. FIG. 4 is a diagram showing an example of waveforms of inductance, voltage, and current of each phase in a general 4-pole, 6-slot switched reluctance motor. FIG. 5 is a diagram illustrating an example of waveforms of inductance, voltage, and current of each phase in a 2-pole, 6-slot switched reluctance motor without skew. FIG. 6 is a diagram showing an example of waveforms of inductance, voltage, and current of each phase in the switched reluctance motor according to the embodiment. FIG. 7 is a diagram showing an example of a waveform of mutual inductance in a 2-pole, 6-slot switched reluctance motor without skew. FIG. 8 is a diagram showing an example of a waveform of mutual inductance in the switched reluctance motor according to the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding components have the same reference characters allotted, and the same description will not be repeated.

<Motor configuration>
As shown in FIG. 1, a switched reluctance motor (SR motor) 10 according to the present embodiment includes a stator core 1, a winding group 2, and a rotor 3.

[Stator core]
As shown in FIG. 1, the stator core 1 includes a yoke 11 and six stator teeth 12Ua, 12Va, 12Wa, 12Ub, 12Vb, and 12Wb. In addition, for convenience of explanation, the stator teeth 12Ua, 12Va, 12Wa, 12Ub, 12Vb, and 12Wb may be simply referred to as stator teeth 12 without distinction.

  The yoke 11 is arranged around the rotor 3. In the present embodiment, the yoke 11 is formed in a cylindrical shape. However, the yoke 11 may be composed of a plurality of members. For example, the yoke 11 may be divided for each one or more stator teeth 12.

  The six stator teeth 12 protrude inward from the yoke 11. More specifically, the stator teeth 12Ua, 12Va, 12Wa, 12Ub, 12Vb, and 12Wb are arranged at regular intervals in this order along the circumferential direction of the yoke 11. The width Ws of each stator tooth 12 is larger than the interval ds between the stator teeth 12. Note that the width Ws and the interval ds are the width dimension of each stator tooth 12 at the inner end of the stator core 1 and the interval between the stator teeth 12, respectively. A bobbin (not shown) made of an insulating material is mounted on each stator tooth 12.

  The stator core 1 can be formed, for example, by laminating a plurality of electromagnetic steel plates (not shown) in the central axis direction and fixing these electromagnetic steel plates to each other. An insulating layer is provided between the magnetic steel sheets. The shape of the magnetic steel sheet is not particularly limited. Each electromagnetic steel plate may be divided into portions corresponding to each stator tooth 12, or may not be divided, and may correspond to the portion corresponding to the stator main body 11 and the six stator teeth 12. All the parts may be integrally formed.

[Winding]
As shown in FIG. 1, the winding group 2 includes windings 2Ua, 2Va, 2Wa, 2Ub, 2Vb, and 2Wb. The winding group 2 also includes a crossover (not shown) for connecting the windings. The winding group 2 is formed of a known electric wire such as a magnet wire.

  The windings 2Ua, 2Va, 2Wa, 2Ub, 2Vb, 2Wb are formed in a concentrated winding format. The windings 2Ua, 2Va, 2Wa, 2Ub, 2Vb, 2Wb are wound around stator teeth 12Ua, 12Va, 12Wa, 12Ub, 12Vb, 12Wb of the stator core 1, respectively. The windings 2Ua, 2Va, 2Wa, 2Ub, 2Vb, and 2Wb are insulated from the stator teeth 12Ua, 12Va, 12Wa, 12Ub, 12Vb, and 12Wb by the above-described bobbins (not shown), respectively.

  The winding 2Ua is connected to the winding 2Ub by a crossover (not shown). The winding 2Va is connected to the winding 2Vb by a crossover (not shown). The winding 2Wa is connected to the winding 2Wb by a crossover (not shown).

  The U-phase current is supplied to the windings 2Ua and 2Ub. The V-phase current is supplied to the windings 2Va and 2Vb. The W-phase current is supplied to the windings 2Wa and 2Wb.

[Rotor]
As shown in FIG. 1, the rotor 3 is arranged inside the stator core 1. The rotor 3 includes a rotor main body 31 and two rotor teeth 32a and 32b.

  The rotor main body 31 is formed in a substantially columnar shape. As shown in FIG. 2, a through hole 33 for inserting the rotating shaft 4 (FIG. 1) is formed in the rotor main body 31. The rotor body 31 is rotatably supported by the rotating shaft 4.

  As shown in FIGS. 1 and 2, the rotor teeth 32 a and 32 b protrude radially outward of the rotor main body 31. The rotor teeth 32a protrude in the opposite direction to the rotor teeth 32b. Therefore, the width Wr of each rotor tooth 32a, 32b is smaller than the interval dr between the rotor teeth 32a, 32b. The width Wr is a dimension in the width direction at the outer end of each of the rotor teeth 32a and 32b, and the interval dr is the circumference of the rotor body 31 between the inner end of the rotor tooth 32a and the inner end of the rotor tooth 32b. The length in the direction.

  The width direction dimension Wr (FIG. 2) of each rotor tooth 32a, 32b is substantially equal to the width direction Ws (FIG. 1) of each stator tooth 12. Therefore, when the rotor teeth 32a face one stator tooth 12, the rotor teeth 32b face the other stator tooth 12.

  Specifically, when the rotor teeth 32a face the stator teeth 12Ua, the rotor teeth 32b face the stator teeth 12Ub. Similarly, when the rotor teeth 32a face the stator teeth 12Va, the rotor teeth 32b face the stator teeth 12Vb, and when the rotor teeth 32a face the stator teeth 12Wa, the rotor teeth 32b face the stator teeth 12Wb.

  The rotor body 31 and the rotor teeth 32a and 32b are both formed of a magnetic material. The rotor body 31 and the rotor teeth 32a, 32b are formed integrally.

  The term “integrally formed” in the present embodiment refers not only to a configuration in which the rotor main body 31 and the rotor teeth 32a and 32b are integrally formed, but also to a case where the rotor main body 31 and the rotor teeth 32a and 32b are formed in a secondary manner. This is a concept that also includes a configuration that is joined and integrated. For example, a rotor body 31 that is a magnetic body and rotor teeth 32a and 32b that are magnetic bodies of the same or a different type from the rotor body 31 may be manufactured and then combined, or as described below. By laminating a plurality of electromagnetic steel sheets, the rotor 3 in which the rotor body 31 and the rotor teeth 32a and 32b are integrated can be formed.

  The rotor 3 is skewed. As a result, the rotor teeth 32a and 32b are formed so that the position of the rotor 3 in the circumferential direction is shifted from one end in the central axis direction of the rotor 3 to the other end.

  The skew angle of the rotor 3 is not particularly limited, but is preferably equal to or less than 360 ° / slot number. The skew angle of the rotor 3 is preferably equal to or greater than 360 ° / slot / slot. That is, in the SR motor 10 having the six stator teeth 12, a preferable range of the skew angle is 10 ° to 60 °. Here, the skew angle refers to the angle difference between the one direction in the central axis direction of the rotor 3 and the multidirectional surface in the direction in which the rotor teeth 32a protrude.

  The configuration of the skew applied to the rotor 3 is not particularly limited. For example, the position of each of the rotor teeth 32a and 32b in the circumferential direction may be changed smoothly or may be changed stepwise (step skew).

  FIG. 3A shows an example of a rotor with a step skew. As shown in FIG. 3A, the rotor 3A has five electromagnetic steel plates 5A. Each electromagnetic steel plate 5A has a disk portion 51A and protrusions 52Aa and 52Ab that protrude radially outward from the disk portion 51A. Each disc portion 51A is formed with a through hole 53A into which the rotating shaft 4 is inserted.

  Five electromagnetic steel plates 5A are stacked along the central axis direction of rotor 3A. The five electromagnetic steel plates 5A are stacked while being rotated by a predetermined angle in one direction (counterclockwise in FIG. 3A) from the end EA1 in the central axis direction toward the end EA2. Thus, the protruding portions 52Aa and 52Ab of the five electromagnetic steel plates 5A are arranged such that the circumferential positions thereof gradually shift from the end EA1 to the end EA2. The protruding portions 52Aa and 52Ab form rotor teeth 32Aa and 32Ab. 31 A of rotor main bodies are comprised by each disk part 51A of 5 A of electromagnetic steel plates. The skew angle of the rotor 3A is 60 °.

  FIG. 3B shows another example of the configuration of the rotor having the step skew. As shown in FIG. 3B, the rotor 3B has a plurality of electromagnetic steel plates 5B. In the rotor 3B, as in the rotor 3A of FIG. 3A, each of the electromagnetic steel plates 5B includes a disk portion 51B having a through hole 53B formed therein, and protrusions 52Ba and 52Bb projecting radially outward from the disk portion 51B. Having. However, the rotor 3B has more electromagnetic steel plates 5B than the rotor 3A. The thickness of each electromagnetic steel plate 5B is smaller than the thickness of each electromagnetic steel plate 5A of rotor 3A.

  The electromagnetic steel sheets 5B are also stacked while being rotated by a predetermined angle in one circumferential direction (counterclockwise in FIG. 3B) from the end EB1 in the center axis direction of the rotor 3B toward the end EB2. Therefore, each protruding portion 52Ba, 52Bb is arranged such that the circumferential position is gradually shifted from the end EB1 toward the end EB2. Each protruding portion 52Ba, 52Bb constitutes a rotor tooth 32Ba, 32Bb. Each disk portion 51B constitutes a rotor main body 31B.

  The difference between the angles around the central axis of two adjacent electromagnetic steel sheets 5B is smaller than that illustrated in FIG. 3A. By doing so, the skew angle is adjusted to be 60 ° even in the rotor 3B where the thickness of the electromagnetic steel sheet 5B is small.

<Motor control>
Next, control of the SR motor 10 configured as described above will be described in comparison with control of other motors.

  FIG. 4 shows waveforms of inductances Lua, Lva, Lwa, currents Iua, Iva, Iwa, and voltages Vua, Vva, Vwa generated in windings of each phase in a general three-phase, four-pole, six-slot SR motor. FIG. FIG. 5 is a diagram illustrating waveforms of inductances Lub, Lvb, Lwb, currents Iub, Ivb, Iwb, and voltages Vub, Vvb, Vwb generated in windings of each phase in a three-phase, two-pole, six-slot SR motor. It is. However, in the SR motor according to the waveform in FIG. 5, the rotor is not skewed. FIG. 6 is a diagram illustrating waveforms of inductances Lu, Lv, Lw, currents Iu, Iv, Iw, and voltages Vu, Vv, Vw generated in the winding group 2 in the SR motor 10 according to the present embodiment. . 4 to 6, the horizontal axis represents the rotation angle (mechanical angle) of the rotor.

[3 phase 4 pole 6 slot SR motor]
When driving the three-phase SR motor, any one of the U-phase, V-phase, and W-phase windings is excited according to the rotation angle of the rotor. In the example of FIG. 4, the waveforms of the V-phase voltage Vva and the V-phase current Iva are delayed from the waveforms of the U-phase voltage Vua and the U-phase current Iua by a rotation angle of 30 °. The waveforms of W-phase voltage Vwa and W-phase current Iwa are delayed from V-phase voltage Vva and V-phase current Iva by a rotation angle of 30 °. Therefore, for one rotation of the motor, the U-phase voltage Vua and the U-phase current Iua, the V-phase voltage Vva and the V-phase current Iva, and the W-phase voltage Vwa and the W-phase current Iwa appear every four cycles.

  The U-phase inductance Lua, the V-phase inductance Lva, and the W-phase inductance Lwa in FIG. 4 are shifted by a rotation angle of 30 °. In FIG. 4, any two of the waveforms of the U-phase inductance Lua, the V-phase inductance Lva, and the W-phase inductance Lwa overlap at any rotation angle. As described above, when two of the phase inductances Lua, Lva, Lwa are simultaneously generated, torque is generated in the motor.

[3 phase 2 pole 6 slot SR motor]
(When the rotor is not skewed)
As described above, the skew is not applied to the rotor of the SR motor according to the waveform of FIG. In FIG. 5, the waveforms of the V-phase voltage Vvb and the V-phase current Ivb are delayed from the waveforms of the U-phase voltage Vub and the U-phase current Iub by a rotation angle of 60 °. The waveforms of W-phase voltage Vwb and W-phase current Iwb are delayed from V-phase voltage Vvb and V-phase current Ivb by a rotation angle of 60 °. Therefore, the waveforms of the U-phase voltage Vub and the U-phase current Iub, the V-phase voltage Vvb and the V-phase current Ivb, and the W-phase voltage Vwb and the W-phase current Iwb appear every two cycles for one rotation of the motor.

  As described above, in the case of the SR motor having two poles and six slots, the excitation frequency (the number of pulses per unit time in each phase) is smaller than that of the SR motor having four poles and six slots. It is possible to do. However, in the example of FIG. 5, there is a range R of the rotation angle in which none of the U-phase inductance Lub, the V-phase inductance Lvb, and the W-phase inductance Lwb overlap. In this range R, only one of the inductances Lub, Lvb, Lwb is generated, so that the torque becomes zero.

(When the rotor is skewed)
As shown in FIG. 1, in the SR motor 10 according to the present embodiment, the rotor 3 is skewed. Thus, the inductances Lu, Lv, Lw, currents Iu, Iv, Iw, and voltages Vu, Vv, Vw of the SR motor 10 have waveforms as shown in FIG.

  As shown in FIG. 6, the waveforms of the U-phase voltage Vu and the U-phase current Iu, the V-phase voltage Vv and the V-phase current Iv, and the W-phase voltage Vw and the W-phase current Iw have two skew-free electrodes. As with the six-slot SR motor, the rotation angle is shifted by 60 °. That is, when the SR motor 10 is rotated once, the waveforms of the U-phase voltage Vu and the U-phase current Iu, the V-phase voltage Vv and the V-phase current Iv, and the W-phase voltage Vw and the W-phase current Iw appear every two cycles. Therefore, the excitation frequency of the SR motor 10 can be lower than that of the SR motor having 4 poles and 6 slots.

  In the example shown in FIG. 6, when the rotor 3 starts rotating from a predetermined reference position (position at a rotation angle of 0 °), the V-phase voltage Vv and the V-phase current Iv are supplied to the windings 2Va and 2Vb (FIG. 1). You. As a result, a V-phase inductance Lv is generated in the windings 2Va and 2Vb. When the rotor 3 comes to a position at a rotation angle of 60 °, the V-phase voltage Vv and the V-phase current Iv for the windings 2Va and 2Vb are stopped, and the W-phase voltage Vw and the W-phase current Iw are supplied to the windings 2Wa and 2Wb. . Thereby, a W-phase inductance Lw is generated in the windings 2Wa and 2Wb. When the rotor 3 comes to a position at a rotation angle of 120 °, the W-phase voltage Vw and the W-phase current Iw for the windings 2Wa and 2Wb are stopped, and the U-phase voltage Vu and the U-phase current Iu are supplied to the windings 2Ua and 2Ub. Is done. As a result, a U-phase inductance Lu is generated in the windings 2Ua and 2Ub.

  Each of the waveforms of the inductances Lu, Lv, and Lw has a wider width in the horizontal axis direction than the waveforms of the inductances Lub, Lvb, and Lwb shown in FIG. That is, the inductances Lu, Lv, and Lw occur in a wider range of rotation angles. For this reason, in the example of FIG. 6, unlike the 2-pole, 6-slot SR motor without skew (FIG. 5), two of the U-phase inductance Lu, the V-phase inductance Lv, and the W-phase inductance Lw are in the range. R overlaps. As described above, in the SR motor 10 according to the present embodiment, no matter where the rotor 3 is located, two of the U-phase inductance Lu, the V-phase inductance Lv, and the W-phase inductance Lw are generated at the same time. It never goes to zero.

[Mutual inductance]
Next, the mutual inductance of the SR motor 10 according to the present embodiment will be described in comparison with a two-pole, six-slot motor in which the rotor is not skewed.

  FIG. 7 exemplifies waveforms W1a and W1b of mutual inductance between windings having different phases for a motor having two poles and six slots in which the rotor is not skewed. The waveform W1a shows the mutual inductance between the windings in a different combination from the waveform W2a. As shown in FIG. 7, the value of the mutual inductance changes with a change in the rotation angle (mechanical angle) of the rotor. The waveforms W1a and W2a are disturbed.

  FIG. 8 illustrates waveforms W1 and W2 of mutual inductance between windings having different phases in the SR motor 10 according to the present embodiment. The waveform W1 illustrates the mutual inductance in a different combination of windings than the waveform W2. As described above, the rotor 3 of the SR motor 10 is skewed.

  In the example shown in FIG. 8 as well, the mutual inductance fluctuates with a change in the rotation angle (mechanical angle) of the rotor. However, in FIG. 8, the waveforms W1 and W2 of the mutual inductance are smoother than the waveforms W1a and W2a of the mutual inductance shown in FIG. Thus, the rotation angle of the rotor 3 can be accurately detected using the mutual inductance. The rotation angle of the rotor 3 can be detected based on, for example, the intersection between the waveforms W1 and W2 and the peaks of the waveforms W1 and W2.

<Effects of Embodiment>
As described above, in the SR motor 10 according to the present embodiment, the rotor main body 31 and the rotor teeth 32a and 32b are both formed of a magnetic material. When the rotor teeth 32a face one stator tooth 12, the rotor teeth 32b face the other stator teeth 12. Therefore, when the motor is driven, the lines of magnetic force from one stator tooth 12 to the other stator teeth 12 pass through the rotor teeth 32a, the rotor main body 31, and the rotor teeth 32b. That is, the amount of magnetic flux is not limited by the rotor body 31. Therefore, a large amount of magnetic flux can be secured in the rotor 3, and the occurrence of magnetic saturation can be prevented.

  In the SR motor 10 according to the present embodiment, the rotor main body 31 and the rotor teeth 32a and 32b are integrally formed. According to this configuration, it is possible to prevent the rotor teeth 32a and 32b from being separated from the rotor main body 31, and to rotate the SR motor 10 at a high speed.

  As described above, the SR motor 10 according to the present embodiment can be rotated at a high speed. Further, since the SR motor 10 does not use a permanent magnet, it can be used in a severe environment such as a high temperature. Therefore, the SR motor 10 can be applied to, for example, a device that is required to withstand high-speed rotation and / or a severe environment, such as an electric turbo or an electric charger used for an engine system such as an automobile or an aircraft.

  Since the SR motor 10 according to the present embodiment is a three-phase, two-pole, six-slot motor, the excitation frequency can be smaller than that of a four-pole, six-slot SR motor, and iron loss in a high-frequency region can be reduced. Further, although the SR motor 10 has two poles and six slots, since the rotor 3 is skewed, it is possible to prevent the occurrence of a timing at which no torque is generated, as described above.

  Further, since the rotor 3 is skewed, it is possible to prevent the waveform of the mutual inductance from being disturbed. Therefore, it is possible to accurately detect the position of the rotor 3 based on the mutual inductance.

  In the SR motor 10 according to the present embodiment, the skew is given to the rotor 3, but the skew can be given to the stator core 1 instead of the rotor 3. That is, each stator tooth 12 may be formed so that the position in the circumferential direction is shifted from one end of the stator core 1 in the central axis direction to the other end. Even with such a configuration, it is possible to prevent a timing at which no torque is generated in the SR motor 10. The configuration of the skew applied to the stator core 1 is not particularly limited. For example, the position in the circumferential direction of each stator tooth 12 may be changed smoothly or may be changed stepwise (step skew). When skew is applied to the stator core 1, the skew angle is preferably 360 ° / slot number / slot or more, and more preferably 360 ° / slot number or less. The skew angle of the stator core 1 refers to the difference between the angles of the protruding directions of the respective stator teeth 12 between one surface in the central axis direction of the stator core 1 and a multi-directional surface.

  In the SR motor 10 according to the present embodiment, the windings 2Ua, 2Va, 2Wa, 2Ub, 2Vb, 2Wb are formed in a concentrated winding format. Therefore, the thickness of the windings 2Ua, 2Va, 2Wa, 2Ub, 2Vb, 2Wb can be reduced, and the coil end that does not contribute to the generation of torque can be made smaller than in the case of the distributed winding type.

Reference Signs List 10 Switch reluctance motor 1 Stator core 11 Yoke 12Ua, 12Va, 12Wa, 12Ub, 12Vb, 12Wb Stator teeth 2Ua, 2Va, 2Wa, 2Ub, 2Vb, 2Wb Windings 3, 3A, 3B Rotors 31, 31A, 31B Rotor main body 32a, 32b, 32Aa, 32Ab, 32Ba, 32Bb Rotor teeth

Claims (1)

A rotor including a rotor main body, and two rotor teeth formed integrally with the rotor main body and projecting radially outward of the rotor main body;
A stator core including a yoke arranged around the rotor, and six stator teeth projecting inward from the yoke;
A winding wound around each of the six stator teeth and supplied with one of a U-phase current, a V-phase current, and a W-phase current without overlapping each other on a time axis;
With
The rotor body and the two rotor teeth are formed of a magnetic material,
By the two rotor teeth each position deviated in a circumferential direction of the rotor, and skew is applied to the rotor,
The width dimension of each rotor tooth is substantially equal to the width dimension of each stator tooth. When one rotor tooth faces one stator tooth, the other rotor tooth faces the other stator tooth. And
The skew angle definitive low data is 60 °, switched reluctance motor.

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