JP5235912B2 - Reluctance motor - Google Patents

Description

  The present invention relates to a reluctance motor that uses reluctance torque and is used in an air conditioner, an automobile, and the like. In detail, it is related with the structure of the rotor core of a reluctance motor.

  Reluctance motors are attracting attention as drive motors for electric vehicles, machine tools, and the like because they have a feature that secondary copper loss of the rotor does not occur as compared to induction motors (induction motors). However, this type of motor generally has a low power factor, and in order to use it for industrial purposes, it is necessary to improve the structure of the rotor core or the driving method.

  A conventional reluctance motor is, for example, a reluctance motor having a rotor core in a stator core that generates a rotating magnetic field in order to reduce q-axis inductance. The rotor core has a center hole for shaft insertion and is formed by a die casting method. A core sheet having a predetermined shape having a boss portion made of a nonmagnetic material and a slit along a magnetic flux path from one d-axis to the other d-axis, and divided by the d-axis. A plurality of divided magnetic path portions arranged around the boss portion at a predetermined interval corresponding to the number of poles of the reluctance motor along the outer periphery of the rotor core. The split magnetic path portion is formed with a locking hole that is a long hole in the d-axis direction, and each of the split magnetic path portions has the boss portion formed by the die casting method. When the portion of the hole for the locking is constituted by integrally fixed to the boss portion to be included within the boss portion (e.g., see Patent Document 1).

Japanese Patent No. 4058576

  However, for example, in a conventional reluctance motor provided with slits in the d-axis direction as described in Patent Document 1, q-axis magnetic flux (magnetic flux from one q-axis to the other q-axis) is generated by the slit (flux barrier). Even if it is difficult to pass, the iron core part between the rotor outer peripheral part and the slit becomes a magnetic path, so that leakage of magnetic flux occurs and there is a limit to reducing the q-axis inductance.

  On the other hand, since stress due to centrifugal force acts on the iron core between the rotor outer periphery and the slit, a certain distance (radial direction) is required to obtain sufficient strength, and the core sheet (electromagnetic) For reasons of punching manufacture of the (steel plate), the interval cannot be made smaller than the thickness of the core sheet, and the q-axis inductance could not be made sufficiently small.

  The present invention has been made to solve the above-described problems, and prevents q-axis magnetic flux from passing between the outer peripheral portion of the rotor and the slit, thereby reducing q-axis inductance, high torque, and high efficiency. A reluctance motor capable of realizing the above is provided.

A reluctance motor according to the present invention is a reluctance motor having a rotor in a stator that generates a rotating magnetic field.
The rotor core of the rotor
a first core sheet that is divided along a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction, and the divided divided cores are connected by a connecting portion;
a second core sheet that is not divided in the d-axis direction,
The first core sheet and the second core sheet are appropriately stacked and arranged.

  The reluctance motor according to the present invention is configured such that the first core sheet is divided along a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction. Therefore, the d-axis magnetic flux is easy to pass and makes it difficult to pass the q-axis magnetic flux, and since there is no magnetic path through which the q-axis magnetic flux flows in the outer peripheral core portion, the q-axis inductance can be made sufficiently smaller than the d-axis inductance, Reluctance torque can be increased.

It is a figure shown for a comparison and is a cross-sectional view of a general reluctance motor 500. It is a figure shown for a comparison and is a cross-sectional view of the stator 510 of a general reluctance motor 500. The figure shown for a comparison and the cross-sectional view of the rotor 520 of the general reluctance motor 500. FIG. AA sectional drawing of FIG. The figure shown for a comparison and the cross-sectional view of the rotor 520 of the general reluctance motor 500. FIG. BB sectional drawing of FIG. It is a figure shown for a comparison and is a magnetic flux diagram (d-axis magnetic flux) of the general reluctance motor 500. FIG. The elements on larger scale of FIG. It is a figure shown for a comparison and is a magnetic flux diagram (q-axis magnetic flux) of the general reluctance motor 500. FIG. The elements on larger scale of FIG. The figure shown for a comparison and the figure which shows the leakage of the magnetic flux in q-axis. FIG. 3 shows the first embodiment and is a cross-sectional view of the reluctance motor 100. CC sectional drawing of FIG. FIG. 3 shows the first embodiment and is a cross-sectional view of the stator 110 of the reluctance motor 100. FIG. 3 shows the first embodiment, and is a cross-sectional view of a stator core 111 of a reluctance motor 100. FIG. 16 is an enlarged view near the slot 115 in FIG. 15. FIG. 3 shows the first embodiment and is a cross-sectional view of the rotor 120 of the reluctance motor 100. DD sectional drawing of FIG. FIG. 5 shows the first embodiment and is a plan view of the first core sheet 121a. Fig. 5 shows the first embodiment, and is a plan view of a second core sheet 121b. FIG. 5 shows the first embodiment, and is a cross-sectional view of a reluctance motor 200 of a first modification. The elements on larger scale of FIG. FIG. 5 shows the first embodiment, and is a transverse cross-sectional view of a rotor 220 of a reluctance motor 200 according to a first modification. EE sectional drawing of FIG. FIG. 5 shows the first embodiment, and is a plan view of a first core sheet 221a of a first modification. FIG. 5 shows the first embodiment, and is a plan view of a second core sheet 221b of the first modification. FIG. 5 shows the first embodiment, and is a transverse cross-sectional view of a reluctance motor 300 of a second modification. The elements on larger scale of FIG. FIG. 5 shows the first embodiment, and is a cross-sectional view of a rotor 320 of a reluctance motor 300 according to a second modification. FF sectional drawing of FIG. FIG. 5 shows the first embodiment, and is a plan view of a first core sheet 321a of a second modification. FIG. 5 shows the first embodiment, and is a plan view of a second core sheet 321b of Modification 2. FIG. 5 shows the first embodiment, and is a cross-sectional view of a reluctance motor 400 of a third modification. The elements on larger scale of FIG. FIG. 10 shows the first embodiment, and is a cross-sectional view of a rotor 420 of a reluctance motor 400 according to a third modification. GG sectional drawing of FIG. FIG. 5 shows the first embodiment, and is a plan view of a first core sheet 421a of a third modification. FIG. 5 shows the first embodiment, and is a plan view of a second core sheet 421b of Modification 3. FIG. 9 is a diagram illustrating the first embodiment, and is a transverse cross-sectional view of a reluctance motor 600 of a fourth modification. The elements on larger scale of FIG. FIG. 10 shows the first embodiment, and is a transverse cross-sectional view of a rotor 620 of a reluctance motor 600 of a fourth modification. HH sectional drawing of FIG. FIG. 5 shows the first embodiment, and is a plan view of a first core sheet 621a of a fourth modification. FIG. 5 shows the first embodiment, and is a plan view of a second core sheet 621b of Modification 4. FIG. 10 shows the first embodiment, and is a cross-sectional view of a reluctance motor 700 of a fifth modification. The elements on larger scale of FIG. FIG. 10 shows the first embodiment, and is a cross-sectional view of a rotor 720 of a reluctance motor 700 according to a fifth modification. 48 is a cross-sectional view taken along the line II of FIG. FIG. 10 shows the first embodiment, and is a plan view of a first core sheet 721a of a fifth modification. FIG. 9 shows the first embodiment, and is a plan view of a second core sheet 721b of Modification 5. FIG. 5 shows the first embodiment and is a longitudinal sectional view of a rotor 720 before inserting a reinforcing member 727; FIG. 5 shows the first embodiment and is a conceptual diagram of inserting a reinforcing member 727; FIG. 10 shows the first embodiment, and is a cross-sectional view of a reluctance motor 800 of a sixth modification. The elements on larger scale of FIG. FIG. 10 shows the first embodiment, and is a transverse cross-sectional view of a rotor 820 of a reluctance motor 800 of a sixth modification. JJ sectional drawing of FIG. FIG. 10 shows the first embodiment, and is a plan view of a first core sheet 821a of a sixth modification. FIG. 10 shows the first embodiment, and is a plan view of a second core sheet 821b of Modification 6. FIG. 10 shows the first embodiment, and is a plan view of another second core sheet 921b of Modification 6.

Embodiment 1 FIG.
First, for comparison, a general reluctance motor 500 will be described with reference to FIGS.

  1 to 11 are diagrams for comparison, FIG. 1 is a cross-sectional view of a general reluctance motor 500, FIG. 2 is a cross-sectional view of a stator 510 of the general reluctance motor 500, and FIG. 4 is a cross-sectional view of a rotor 520 of a typical reluctance motor 500, FIG. 4 is a cross-sectional view of AA in FIG. 3, FIG. 5 is a cross-sectional view of a rotor 520 of a general reluctance motor 500, and FIG. FIG. 7 is a magnetic flux diagram (d-axis magnetic flux) of a general reluctance motor 500, FIG. 8 is a partially enlarged view of FIG. 7, and FIG. 9 is a magnetic flux diagram of a general reluctance motor 500 (q 10 is a partially enlarged view of FIG. 9, and FIG. 11 is a diagram showing leakage of magnetic flux on the q axis.

  A general reluctance motor 500 shown in FIG. 1 includes a cylindrical stator 510 and a rotor 520 provided on an inner peripheral portion of the cylindrical stator 510.

  The stator 510 has a configuration similar to that of a permanent magnet type motor or induction motor using a permanent magnet as a rotor. As shown in FIG. 2, the stator 510 includes a cylindrical stator core 511 and a winding 513 inserted into a slot 515 of the stator core 511 via an insulating member (not shown). .

  The stator core 511 is a core back 512 having a cylindrical outer peripheral portion, and teeth 514 (tooth portions) are radially formed inward from the core back 512 in a plurality of radial directions. In the example of FIG. 2, the number of slots 515 is 24, and the number of teeth 514 is 24, which is the same as the number of slots 515.

  The winding 513 is, for example, a three-phase winding (for example, Y connection) of distributed winding or concentrated winding.

  The rotor 520 is disposed on the inner periphery of the stator 510 via a predetermined gap (a space in which the radial dimension is substantially constant).

  The rotor 520 will be described with reference to FIGS. 3 to 10. A rotor 520 disposed via a predetermined gap on the inner peripheral portion of the stator 510 that generates a rotating magnetic field has a rotor core 521 configured by laminating a predetermined number of electromagnetic steel plates punched into a predetermined shape; The rotor core 521 includes end plates 525 (see, for example, FIGS. 4 and 6) provided at both ends in the axial direction, and a rotor shaft 524 fitted to the rotor core 521 and the end plate 525.

  The electromagnetic steel plate constituting the rotor core 521 is provided with a first slit portion 522a and a second slit portion 522b. The first slit portion 522a and the second slit portion 522b have an arc shape (reverse arc shape) directed from the one d axis to the other d axis with the apex facing the shaft hole into which the rotation shaft 524 is fitted. It is formed in the outer peripheral direction of the rotor core 521. The first slit portion 522a and the second slit portion 522b are formed at predetermined intervals in the circumferential direction along the outer periphery of the rotor core 521 by the number of poles (four poles in FIG. 3). .

  For example, the electromagnetic steel plates constituting the rotor core 521 are laminated by caulking 523. Further, end plates 525 are fixed to both ends in the axial direction of the rotor core 521 laminated by the crimping 523.

  The plurality of first slit portions 522a and second slit portions 522b function as flux barriers. Therefore, q (quadrature) axis magnetic flux (magnetic flux from one q axis to the other q axis) from the stator core 511 is made difficult to pass (the q axis magnetic path is small), while the first slit portion 522a, The magnetic path between the second slit portions 522b passes the d (direct) axis magnetic flux (magnetic flux from one d axis to the other d axis) from the stator core 511 (the d axis magnetic path is large).

In the reluctance motor 500 configured as described above, a rotating magnetic field is applied to the stator core 511 from a plurality of field portions of the stator 510. Thereby, a reluctance torque T is generated. This reluctance torque T is expressed by the following equation.
T = Pn (Ld−Lq) id × iq (1)
Here, Pn is the number of pole pairs, Ld is a d-axis inductance, Lq is a q-axis inductance, id is a d-axis current, and iq is a q-axis current.

  From the above equation (1), it can be seen that it is the magnitude of the difference (Ld−Lq) between the d-axis inductance and the q-axis inductance that affects the performance of the motor (reluctance motor 500). Therefore, in order to increase the difference (Ld−Lq), the first slit portion 522a and the second slit portion 522b are provided by providing the first slit portion 522a and the second slit portion 522b (flux barrier). In addition, a resistance is given to the magnetic path in the q-axis direction that crosses, and a magnetic path in the d-axis direction sandwiched between the first slit portion 522a and the second slit portion 522b is secured.

  That is, as shown in FIGS. 7 and 8, the d-axis magnetic flux (solid arrow in FIG. 7) has an arc-shaped slit (here, as shown in the enlarged view of FIG. 8, there are six slits in one pole. Pass through the magnetic path between

  Also, as shown in FIGS. 9 and 10, the q-axis magnetic flux (solid arrow in FIG. 9) has an arc-shaped slit (here, six slits per pole as shown in the enlarged view of FIG. 10). Provided) as a flux barrier, it is difficult to pass. Since the q-axis magnetic flux is smaller than the d-axis magnetic flux, the solid line arrow in FIG. 9 is indicated by a line thinner than the solid line arrow in FIG.

  Accordingly, the d-axis inductance Ld becomes larger than the q-axis inductance Lq, and the reluctance motor 500 generates a reluctance torque proportional to the difference between the d-axis inductance Ld and the q-axis inductance Lq.

  However, the general reluctance motor 500 has a problem that magnetic flux leaks from the core portion between the outer periphery of the rotor core 521 and the slit even if the flux barrier is provided by the arc-shaped slit.

  As shown in FIG. 11, in the q-axis, in addition to the main q-axis magnetic flux q <b> 1, the leakage magnetic flux leaking from the core portion between the outer periphery of the rotor core 521 and the first slit portion 522 a and the second slit portion 522 b. q2 is present. Due to this leakage flux q2, there is a limit to reducing the q-axis inductance.

If the radial dimension of the core part between the outer periphery of the rotor core 521 and the first slit part 522a and the second slit part 522b is reduced, the leakage flux q2 in FIG. 11 can be reduced. There is a limit to it for the reason shown.
(1) Stress due to centrifugal force is generated in the iron core portion between the outer periphery of the rotor iron core 521 and the first slit portion 522a and the second slit portion 522b when the rotor 520 rotates. In order to withstand the stress due to the centrifugal force, the core portion between the outer periphery of the rotor core 521 and the first slit portion 522a and the second slit portion 522b needs to have a predetermined radial dimension. .
(2) The electrical steel sheet constituting the rotor core 521 is punched into a predetermined shape. At this time, it is difficult to make the radial dimension of the iron core portion between the outer periphery of the rotor iron core 521 and the first slit portion 522a and the second slit portion 522b smaller than the thickness of the electromagnetic steel sheet. The thickness of the electromagnetic steel sheet is usually about 0.3 to 0.7 mm.

  Therefore, in the present embodiment, the core part between the outer periphery of the rotor core and the slit is eliminated so that the leakage flux q2 in the q axis is not generated. Thereby, the q-axis inductance Lq can be reduced. Hereinafter, the reluctance motor 100 of this Embodiment is demonstrated, referring drawings.

  12 to 59 show the first embodiment. FIG. 12 is a cross-sectional view of the reluctance motor 100. FIG. 13 is a cross-sectional view taken along the line C-C of FIG. 15 is a cross-sectional view of the stator core 111 of the reluctance motor 100, FIG. 16 is an enlarged view of the vicinity of the slot 115 of FIG. 15, FIG. 17 is a cross-sectional view of the rotor 120 of the reluctance motor 100, and FIG. FIG. 19 is a plan view of the first core sheet 121a, FIG. 20 is a plan view of the second core sheet 121b, and FIG. 21 is a cross-sectional view of the reluctance motor 200 of Modification 1. FIG. 22 is a partially enlarged view of FIG. 21, FIG. 23 is a cross-sectional view of the rotor 220 of the reluctance motor 200 of the first modification, FIG. 24 is a cross-sectional view taken along the line EE of FIG. Core sheet 26 is a plan view of the second core sheet 221b of the first modification, FIG. 27 is a transverse sectional view of the reluctance motor 300 of the second modification, FIG. 28 is a partially enlarged view of FIG. 27, and FIG. FIG. 30 is a cross-sectional view of the rotor 320 of the reluctance motor 300 according to the second modification, FIG. 30 is a cross-sectional view taken along line FF in FIG. 29, FIG. 31 is a plan view of the first core sheet 321a according to the second modification, and FIG. 33 is a plan view of the second core sheet 321b of FIG. 2, FIG. 33 is a cross-sectional view of the reluctance motor 400 of Modification 3, FIG. 34 is a partially enlarged view of FIG. 33, and FIG. FIG. 36 is a cross-sectional view taken along line GG in FIG. 35, FIG. 37 is a plan view of the first core sheet 421a of the third modification, and FIG. 38 is a plan view of the second core sheet 421b of the third modification. Fig. 39 shows the modification of the fourth example FIG. 40 is a partially enlarged view of FIG. 39, FIG. 41 is a transverse sectional view of the rotor 620 of the reluctance motor 600 according to the modified example 4, FIG. 42 is a sectional view taken along the line H-H in FIG. FIG. 44 is a plan view of the second core sheet 621b of Modification 4, FIG. 45 is a cross-sectional view of the reluctance motor 700 of Modification 5, and FIG. 46 is a plan view of the first core sheet 621a of Modification 4. 45 is a partially enlarged view, FIG. 47 is a cross-sectional view of a rotor 720 of a reluctance motor 700 according to Modification 5, FIG. 48 is a cross-sectional view taken along II of FIG. 47, and FIG. FIG. 50 is a plan view of the second core sheet 721b of Modification 5, FIG. 51 is a longitudinal sectional view of the rotor 720 before inserting the reinforcing member 727, and FIG. 52 is an image view of inserting the reinforcing member 727. FIG. 53 shows the reluctance of the modified example 6. 54 is a partially enlarged view of FIG. 53, FIG. 55 is a transverse sectional view of the rotor 820 of the reluctance motor 800 of Modification 6, FIG. 56 is a sectional view taken along line JJ of FIG. FIG. 58 is a plan view of a second core sheet 821b of Modification Example 6. FIG. 59 is a plan view of another second core sheet 921b of Modification Example 6. FIG. It is.

  As shown in FIG. 12, a reluctance motor 100 (hereinafter also simply referred to as a motor) includes a cylindrical stator 110 and a gap having a predetermined radial dimension on the inner periphery of the cylindrical stator 110. 116 (see FIG. 13). The reluctance motor 100 is, for example, a 4-pole motor. However, this is an example, and the number of poles of the reluctance motor 100 may be an arbitrary number.

  The length of the gap 116 in the radial direction is, for example, about 0.5 mm (0.2 to 1 mm).

  As shown in FIGS. 13 and 14, the stator 110 of the reluctance motor 100 includes a stator core 111 and windings inserted into a slot 115 (see FIG. 14) of the stator core 111 via an insulating member (not shown). 113. The winding 113 protrudes in the axial direction from both axial end surfaces of the stator core 111. A portion protruding in the axial direction from both axial end surfaces of the stator core 111 of the winding 113 is referred to as a coil end 113a.

  As shown in FIG. 15, the stator core 111 of the reluctance motor 100 is a core back 112 having a cylindrical outer periphery, and a plurality of teeth 114 are formed radially inside the core back 112. A space between adjacent teeth 114 is called a slot 115. In the example shown in FIG. 15, 24 slots 115 are formed at substantially equal intervals in the circumferential direction inside the core back 112. The number of slots 115 is not limited to 24, and may be arbitrary. The teeth 114 have a substantially constant length (width) in the circumferential direction. Therefore, the circumferential length (width) of the slot 115 is such that the core back 112 side is longer than the rotor 120 side.

  As shown in the enlarged view of FIG. 16, the teeth 114 are formed to extend from the core back 112 to the rotor 120 side in parallel to the radial direction. Both ends of the tip 114a of the tooth 114 protrude in the circumferential direction, for example, in an umbrella shape. The slot 115 has a circumferential length (width) that decreases from the core back 112 side toward the rotor 120 side, but the tip 114a of the tooth 114 protrudes in the circumferential direction in the shape of an umbrella. At the end on the 120 side, it is narrower than the inside of the slot 115. The slot 115 opens to the inner periphery, and this opening is called, for example, a slot opening 117 (slot opening). The winding 113 is inserted from the slot opening 117.

  As the winding 113, a magnet wire in which a copper wire is insulated is used. The winding 113 is, for example, a three-phase (U phase, V phase, and W phase) distributed winding, but may be a concentrated winding.

  A slot cell or a wedge is used as an insulating member (not shown) provided in the slot 115.

  Next, the rotor 120 that is a characteristic part of the present embodiment will be described. As shown in FIGS. 17 and 18, the rotor 120 includes a rotor core 121 in which two types of core sheets (first core sheet 121 a and second core sheet 121 b) are stacked, and a shaft of the rotor core 121. End plates 125 that are fixed to both end surfaces in the direction, and a rotating shaft 124 that fits in a substantially central portion of the rotor core 121 and the end plate 125.

  The rotor core 121 uses two types of core sheets (a first core sheet 121a and a second core sheet 121b). As shown in FIG. 19, since the first core sheet 121a does not have an outer peripheral iron core portion, the outer divided iron core 121a-1 (divided iron core) and the inner divided iron core 121a-2 (divided iron core) are connected. Not (separated).

  The first core sheet 121a and the second core sheet 121b are formed by punching and laminating electromagnetic steel sheets having a high magnetic permeability and having a thickness of about t = 0.5 mm (0.1 to 1 mm) into a predetermined shape. It is fixed with caulking 123. Processing may be laser cutting.

  The outer divided iron core 121 a-1 is formed in an arc shape opposite to the outer circumference circle, and the vertex of the arc is directed to the center of the rotor iron core 121. Further, the outer divided iron core 121a-1 has an arc shape that follows the flow of the d-axis magnetic flux. The center of the outer divided core 121a-1 in the circumferential direction substantially coincides with the q axis. Since the reluctance motor 100 has four poles, the four outer divided iron cores 121a-1 are arranged at substantially equal intervals in the circumferential direction. A space is formed between the arc shape of the outer divided iron core 121a-1 and the virtual outer circumference circle, and is a first slit portion 122a. The first slit portion 122a serves as a resistance to the flow of the q-axis magnetic flux and reduces the q-axis inductance Lq.

  The four outer divided iron cores 121a-1 are fixed and stacked by two caulking 123, respectively. Since positioning is difficult if there is only one caulking 123, two or more caulking 123 are preferable.

  A substantially cross-shaped inner divided core 121a-2 is provided inside the four outer divided cores 121a-1. The inner divided iron core 121a-2 has a shaft hole 126 into which the rotary shaft 124 is fitted at the center. The portion of the outer circumference of the inner divided core 121a-2 that faces the outer divided core 121a-1 is formed in an arc shape opposite to the outer circle, as with the outer divided core 121a-1. The vertex is directed to the center of the rotor core 121. And the circular arc of the outer periphery of the inner side division | segmentation iron core 121a-2 has comprised the substantially concentric circle with the circular arc of the outer side division | segmentation iron core 121a-1. The arc portion of the inner divided core 121a-2 facing the outer divided core 121a-1 is formed in the same number (four places) as the number (four) of the outer divided core 121a-1.

  In the inner divided iron core 121a-2, the iron core along the arc portion facing the outer divided iron core 121a-1 is a magnetic path of d-axis magnetic flux. Further, an arc-shaped second slit portion 122b which is a space exists between the outer divided iron core 121a-1 and the inner divided iron core 121a-2. The arc part of the inner divided core 121a-2 and the center of the second slit part 122b substantially coincide with the q axis.

  Since the arc-shaped second slit portion 122b that is a space exists between the outer divided core 121a-1 and the inner divided core 121a-2, the second slit 122b is used for the flow of the q-axis magnetic flux. It becomes resistance, and the q-axis inductance Lq is reduced.

  The inner divided iron core 121a-2 is fixed by caulking 123 in the vicinity of the outer periphery of the iron core portion projecting in the d-axis direction at the four crosses.

  In another expression for the configuration of the first core sheet 121a, the first core sheet 121a follows a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction. The outer divided iron core 121a-1 and the inner divided iron core 121a-2 are divided.

  Here, the outer divided iron core 121 a-1 is shown as an example, but a plurality of outer cores 121 a-1 are formed in an arc shape opposite to the outer circumference circle, and the apex of the arc faces the center of the rotor core 121. It may be constituted by an arc-shaped divided iron core having a substantially concentric circle. The division | segmentation of the 1st core sheet 121a should just be 1 layer or more.

  The outer divided iron core 121a-1, the inner divided iron core 121a-2, and the divided first slit part 122a and second slit part 122b (air layer) of the first core sheet 121a flow of magnetic flux. In consideration of the direction, it is preferable to form an arc along the magnetic path from one d-axis to the other d-axis as described above, but it may be V-shaped or U-shaped.

  As shown in FIG. 18, in the rotor core 121, the main core portion laminated by the first core sheet 121a is located in the center, and both end portions (both end portions in the axial direction) are sandwiched by the second core sheet 121b. doing. It is preferable that the axial length of the main core portion laminated by the first core sheet 121a is longer than the axial length of the stator core 111 (see FIG. 13). This is to reduce the q-axis inductance Lq.

  Next, the second core sheet 121b will be described. The second core sheet 121b functions as a supporting base while positioning and fixing the first core sheet 121a.

  As shown in FIG. 20, the second core sheet 121b is a disc having a shaft hole 126 at a substantially central portion. The second core sheet 121b is provided mainly for fixing the main core portion laminated by the first core sheet 121a composed of the divided outer divided core 121a-1 and inner divided core 121a-2. It is done. The iron core portion obtained by laminating the outer divided core 121a-1 with the caulking 123 and the iron core portion obtained by laminating the inner divided iron core 121a-2 with the caulking 123 are in a disjoint state, and the second core sheet 121b having a disk shape is separated. It is integrated for the first time by fixing with caulking 123. However, since the second core sheet 121b has a disk shape, it passes a q-axis magnetic flux (a magnetic path is formed in the q-axis direction and the q-axis inductance Lq is increased). Accordingly, the number of the second core sheets 121b is as small as possible within a range in which the strength necessary for fixing the divided portions (the outer divided core 121a-1 and the inner divided core 121a-2) of the first core sheet 121a can be maintained. Is preferred. Moreover, it is preferable that the q-axis magnetic flux is located on the outer side from the end surface in the axial direction of the stator core 111 so that the q-axis magnetic flux hardly passes (see FIGS. 13 and 18).

  The second core sheet 121b is provided with caulking 123 connected to the first core sheet 121a at a total of 12 locations.

  The thus configured rotor core 121 is sandwiched between end plates 125 at both ends of the rotor core 121 and fixed to the rotating shaft 124 by press-fitting, shrink fitting, or the like.

  Next, the operation will be described. The rotor 120 configured as described above is divided in the d-axis direction by dividing the first core sheet 121a into the outer divided iron core 121a-1 and the inner divided iron core 121a-2 along the d-axis direction. Magnetic flux can easily pass, and magnetic flux can be made difficult to pass in the q-axis direction. In the general rotor 520 of the comparative example, since there is an iron core portion between the outer periphery of the rotor core 521 and the first slit portion 522a and the second slit portion 522b, the leakage magnetic flux q1 ( There is a limit to the reduction of the q-axis inductance Lq. In the rotor 120 of the present embodiment, since the outer divided core 121a-1 and the inner divided core 121a-2 are separated and there is no outer peripheral core, the outer periphery of the rotor core 121 and the first slit 122a and The q-axis magnetic flux does not flow (leak) between the second slit portion 122b and the q-axis inductance can be made smaller than that of the general rotor 520.

  Since the magnetic path in the q-axis direction is formed in the second core sheet 121b, the first core sheet 121a is divided in the d-axis direction (outer divided core 121a-1, inner divided core 121a-2). The slits (first slit part 122a, second slit part 122b) are provided in a shape along the line, or the interlinkage magnetic flux from the stator 110 mainly flows through the first core sheet 121a of the rotor core 121. Thus, the axial length (core width) of the rotor core 121 is configured to be larger than the axial length (core width) of the stator core 111, and in particular the core portion of the first core sheet 121a. It is preferable that the axial length is larger than the axial length (core width) of the stator core 111. In addition, the second core sheet 121b is preferably located outside the axial end surface of the stator core 111. By doing so, it becomes difficult for the q-axis magnetic flux to pass through the second core sheet 121b.

  As described above, in the rotor 120 of the present embodiment, the rotor core 121 is configured by the first core sheet 121a and the second core sheet 121b, and the first core sheet 121a is in the d-axis direction. The length in the axial direction of the iron core portion formed by laminating the first core sheet 121a, which is composed of the outer divided iron core 121a-1 and the inner divided iron core 121a-2 divided along the axis of the stator 110, By making it longer than the length in the direction (core width), it is difficult for the q-axis magnetic flux to pass through the main core portion constituted by the first core sheet 121a, and the q-axis inductance Lq can be reduced. In particular, the iron core portion formed of the first core sheet 121a does not have an outer iron core portion where q-axis magnetic flux leaks in the iron core outer circumference portion. The difference from the inductance Lq can be increased, and a large torque can be generated with a small current. Since the current is small, the copper loss generated in the winding 113 is reduced, the heat generation of the winding 113 is suppressed, and the reluctance motor 100 with high efficiency and high reliability can be obtained.

  The first core sheet 121a is divided into the outer divided iron core 121a-1 and the inner divided iron core 121a-2 along the d-axis direction, but is separated, but the disk-shaped second core sheets 121b at both ends. Since each of the outer divided iron cores 121a-1 and inner divided iron cores 121a-2 is fixed by a predetermined number of caulkings 123, an integrated rotor core 121 excellent in strength can be obtained.

  Further, the first core sheet 121a divided into the outer divided iron core 121a-1 and the inner divided iron core 121a-2 is laminated while being positioned on the second core sheet 121b, and is fixed by the caulking 123. The rotor core 121 can be easily configured with good workability simply by switching the press teeth between the first core sheet 121a and the second core sheet 121b.

  In the above description, the rotor core 121 has been described with the example in which the second core sheet 121b is provided at both axial ends of the first core sheet 121a. However, the second core is also provided between the first core sheets 121a. A sheet 121b may be provided.

  Next, a reluctance motor 200 of Modification 1 will be described with reference to FIGS. The reluctance motor 200 according to the first modification differs from the reluctance motor 100 in the configuration of the rotor 220. In the rotor 120 of the reluctance motor 100, the first core sheet 121a and the second core sheet 121b are stacked and fixed by caulking 123. However, the rotor 220 of the reluctance motor 200 according to Modification 1 uses rivets. The first core sheet 221a and the second core sheet 221b are stacked and fixed.

  As shown in FIG. 21, a reluctance motor 200 (hereinafter sometimes simply referred to as a motor) includes a cylindrical stator 210 and a gap having a predetermined radial dimension on the inner periphery of the cylindrical stator 210. 226 (see FIG. 22). The reluctance motor 200 is, for example, a 4-pole motor.

  The length of the gap 216 in the radial direction is, for example, about 0.5 mm (0.2 to 1 mm).

  The stator 210 of the reluctance motor 200 has the same configuration as the stator 110 shown in FIGS.

  As shown in FIG. 23, the rotor 220 includes a rotor core 221 in which two types of core sheets (first core sheet 221 a and second core sheet 221 b) are stacked, and both axial end surfaces of the rotor core 221. And an end plate 225 (see FIG. 24) fixed to the rotor core 221 and a rotating shaft 224 fitted to substantially the center of the end plate 225.

  The rotor core 221 uses two types of core sheets (a first core sheet 221a and a second core sheet 221b). As shown in FIG. 25, since the first core sheet 221a does not have an outer peripheral iron core portion, the outer divided iron core 221a-1 (divided iron core) and the inner divided iron core 221a-2 (divided iron core) are connected to each other. Not (separated).

  The first core sheet 221a and the second core sheet 221b are formed by punching and laminating electromagnetic steel sheets having a high magnetic permeability and having a thickness of about t = 0.5 mm (0.1 to 1 mm) into a predetermined shape by pressing. The hole 223 is fixed through a rivet (not shown). Processing may be laser cutting.

  The outer divided iron core 221 a-1 is formed in an arc shape opposite to the outer circumference circle, and the apex of the arc is directed to the center of the rotor iron core 221. The outer divided iron core 221a-1 has an arc shape that follows the flow of the d-axis magnetic flux. The center of the outer divided iron core 221a-1 in the circumferential direction substantially coincides with the q axis. Since the reluctance motor 200 has four poles, the four outer divided iron cores 221a-1 are arranged at substantially equal intervals in the circumferential direction. A space between the arc shape of the outer divided iron core 221a-1 and the virtual outer circumference circle is a space, which is the first slit portion 222a. The first slit portion 222a serves as a resistance to the flow of the q-axis magnetic flux and reduces the q-axis inductance Lq.

  The four outer divided iron cores 221a-1 are stacked by being fixed by rivets at two rivet holes 223, respectively. Since positioning is difficult if there is only one rivet hole 223, two or more rivet holes 223 are preferable.

  A substantially cross-shaped inner divided core 221a-2 is provided inside the four outer divided cores 221a-1. The inner divided iron core 221a-2 has a shaft hole 226 into which the rotating shaft 224 is fitted at the center. The portion of the outer circumference of the inner divided core 221a-2 that faces the outer divided core 221a-1 is formed in an arc shape opposite to the outer circumference circle, similar to the outer divided core 221a-1, and The vertex is directed to the center of the rotor core 221. And the circular arc of the outer periphery of the inner side split iron core 221a-2 has comprised the substantially concentric circle with the circular arc of the outer side split iron core 221a-1. The number of arc portions of the inner divided iron core 221a-2 facing the outer divided iron core 221a-1 is the same as the number (four) of the outer divided iron cores 221a-1.

  In the inner divided iron core 221a-2, the iron core along the circular arc portion facing the outer divided iron core 221a-1 is a magnetic path of the d-axis magnetic flux. In addition, an arc-shaped second slit portion 222b that is a space exists between the outer divided iron core 221a-1 and the inner divided iron core 221a-2. The arc part of the inner divided iron core 221a-2 and the center of the second slit part 222b substantially coincide with the q axis.

  Since the arc-shaped second slit portion 222b, which is a space, exists between the outer divided core 221a-1 and the inner divided core 221a-2, the second slit portion 222b has a flow of the q-axis magnetic flux. It becomes resistance, and the q-axis inductance Lq is reduced.

  The inner divided iron core 221a-2 is fixed to the rivet hole 223 through the rivet in the vicinity of the outer periphery of the iron core portion projecting in the d-axis direction at the four crosses.

  In another expression for the configuration of the first core sheet 221a, the first core sheet 221a follows a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction. The outer divided iron core 221a-1 and the inner divided iron core 221a-2 are divided.

  Here, the outer divided iron core 221a-1 has been shown as an example, but a plurality of outer iron cores 221a-1 are formed in an arc shape opposite to the outer circumference circle, and the apex of the arc faces the center of the rotor iron core 221. It may be constituted by an arc-shaped divided iron core having a substantially concentric circle. The division | segmentation of the 1st core sheet | seat 221a should just be 1 layer or more.

  The outer divided iron core 221a-1, the inner divided iron core 221a-2, and the divided first slit portion 222a and second slit portion 222b (air layer) of the first core sheet 221a flow of magnetic flux. In consideration of the direction, it is preferable to form an arc along the magnetic path from one d-axis to the other d-axis as described above, but it may be V-shaped or U-shaped.

  As shown in FIG. 24, in the rotor core 221, the main core portion laminated by the first core sheet 221a is located at the center, and both end portions (both end portions in the axial direction) are sandwiched by the second core sheet 221b. doing. It is preferable that the axial length of the main core portion laminated by the first core sheet 221a is longer than the axial length of the stator core 211. This is to reduce the q-axis inductance Lq.

  Next, the second core sheet 221b will be described. The second core sheet 221b functions as a supporting base while positioning and fixing the first core sheet 221a.

  As shown in FIG. 26, the second core sheet 221b is a disc having a shaft hole 226 at a substantially central portion. The second core sheet 221b is mainly provided to fix the main core portion laminated by the first core sheet 221a composed of the divided outer divided core 221a-1 and inner divided core 221a-2. It is done. The outer divided iron core 221a-1 and the inner divided iron core 221a-2 are in a separated state, and are integrated for the first time by being fixed to the rivet hole 223 through the rivet together with the disc-shaped second core sheet 221b. . However, since the second core sheet 221b has a disk shape, it passes the q-axis magnetic flux (a magnetic path is formed in the q-axis direction, and the q-axis inductance Lq is increased). Accordingly, the number of the second core sheets 221b is as small as possible within a range in which the strength necessary for fixing the divided portions (the outer divided iron core 221a-1 and the inner divided iron core 221a-2) of the first core sheet 221a can be maintained. Is preferred. In addition, it is preferable that the q-axis magnetic flux is located on the outer side from the axial end surface of the stator core 211 so that the q-axis magnetic flux hardly passes.

  The second core sheet 221b is provided with rivet holes 223 connected to the first core sheet 121a at a total of 12 locations.

  The rotor core 221 configured in this way is sandwiched between end plates 225 (same as the end plate 125, not shown) at both ends of the rotor core 221 and fixed to the rotary shaft 224 by press fitting, shrink fitting, or the like. .

  In the above description, the example in which the rotor core 221 is provided with the second core sheet 221b at both axial ends of the first core sheet 221a has been described, but the second core is also provided between the first core sheets 221a. A sheet 221b may be provided.

  Next, a reluctance motor 300 of Modification 2 will be described with reference to FIGS. The reluctance motor 300 of the second modification is different from the reluctance motor 100 in the configuration of the rotor 320. In the rotor 120 of the reluctance motor 100, the second core sheet 121b is formed of a disk without a slit. However, in the reluctance motor 300 according to the second modification, the first core sheet 321b also has the first slit. A portion 322a (slit) and a second slit portion 322b (slit) are provided.

  As shown in FIG. 27, a reluctance motor 300 (hereinafter also simply referred to as a motor) includes a cylindrical stator 310 and a gap having a predetermined radial dimension on the inner periphery of the cylindrical stator 310. 316 (see FIG. 28). The reluctance motor 300 is, for example, a four-pole motor.

  The length of the gap 316 in the radial direction is, for example, about 0.5 mm (0.2 to 1 mm).

  The stator 310 of the reluctance motor 300 has the same configuration as the stator 110 shown in FIGS.

  As shown in FIG. 29, the rotor 320 includes a rotor core 321 in which two types of core sheets (first core sheet 321 a and second core sheet 321 b) are stacked, and both axial end surfaces of the rotor core 321. And an end plate 325 (see FIG. 30) fixed to the rotor core 321 and a rotating shaft 324 fitted to substantially the center of the end plate 325.

  The rotor core 321 uses two types of core sheets (a first core sheet 321a and a second core sheet 321b). As shown in FIG. 31, since the first core sheet 321a does not have an outer peripheral iron core portion, the outer divided iron core 321a-1 and the inner divided iron core 321a-2 are not connected (separated). .

  The first core sheet 321a and the second core sheet 321b are formed by punching and laminating electromagnetic steel sheets having a high magnetic permeability with a thickness of about t = 0.5 mm (0.1 to 1 mm) into a predetermined shape. It is fixed with caulking 323. Processing may be laser cutting.

  The outer divided iron core 321 a-1 is formed in an arc shape opposite to the outer circumference circle, and the vertex of the arc is directed to the center of the rotor iron core 321. The outer divided iron core 321a-1 has an arc shape that follows the flow of the d-axis magnetic flux. The center in the circumferential direction of the outer divided iron core 321a-1 substantially coincides with the q axis. Since the reluctance motor 300 has four poles, the four outer divided iron cores 321a-1 are arranged at substantially equal intervals in the circumferential direction. A space between the arc shape of the outer divided iron core 321a-1 and the virtual outer circumference circle is a space, which is the first slit portion 322a. The first slit portion 322a serves as a resistance for the flow of the q-axis magnetic flux, and reduces the q-axis inductance Lq.

  The four outer divided cores 321a-1 are fixed and stacked by two caulking 323, respectively. Since positioning is difficult if there is one caulking 323, two or more caulking 323 are preferable.

  A substantially cross-shaped inner divided core 321a-2 is provided inside the four outer divided cores 321a-1. The inner divided iron core 321a-2 has a shaft hole 326 into which the rotation shaft 324 is fitted at the center. The portion of the outer periphery of the inner divided core 321a-2 that faces the outer divided core 321a-1 is formed in an arc shape opposite to the outer peripheral circle, similarly to the outer divided core 321a-1, and The vertex is directed to the center of the rotor core 321. And the circular arc of the outer periphery of the inner side divided iron core 321a-2 has comprised the substantially concentric circle with the circular arc of the outer side divided iron core 321a-1. The number of arc portions of the inner divided iron core 321a-2 facing the outer divided iron core 321a-1 is the same as the number (four) of the outer divided iron cores 321a-1.

  In the inner divided iron core 321a-2, the iron core along the arc portion facing the outer divided iron core 321a-1 is a magnetic path of d-axis magnetic flux. Moreover, the circular-arc-shaped 2nd slit part 322b which is space exists between the outer side division | segmentation iron core 321a-1 and the inner side division | segmentation iron core 321a-2. The arc portion of the inner divided iron core 321a-2 and the center of the second slit portion 322b substantially coincide with the q axis.

  Between the outer divided core 321a-1 and the inner divided core 321a-2, there is an arc-shaped second slit portion 322b that is a space. Therefore, the second slit portion 322b is used for the flow of the q-axis magnetic flux. It becomes resistance, and the q-axis inductance Lq is reduced.

  The inner divided iron core 321a-2 is fixed by caulking 323 in the vicinity of the outer periphery of the iron core portion protruding in the d-axis direction at the four crosses.

  In another expression for the configuration of the first core sheet 321a, the first core sheet 321a follows a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction. The outer divided iron core 321a-1 and the inner divided iron core 321a-2 are divided.

  Here, the outer divided iron core 321a-1 is shown as an example, but a plurality of outer cores 321a-1 are formed in an arc shape opposite to the outer circumference circle and the apex of the arc faces the center of the rotor core 321. It may be constituted by an arc-shaped divided iron core having a substantially concentric circle. The division | segmentation of the 1st core sheet | seat 321a should just be 1 layer or more.

  The outer divided core 321a-1, the inner divided core 321a-2, and the divided first slit 322a and second slit 322b (air layer) of the first core sheet 321a flow magnetic flux. In consideration of the direction, it is preferable to form an arc along the magnetic path from one d-axis to the other d-axis as described above, but it may be V-shaped or U-shaped.

  As shown in FIG. 30, in the rotor core 321, the main core portion laminated by the first core sheet 321a is located at the center, and both end portions (both axial end portions) are sandwiched by the second core sheet 321b. doing. It is preferable that the axial length of the main core portion laminated by the first core sheet 321a is longer than the axial length of the stator core 311. This is to reduce the q-axis inductance Lq.

  Next, the second core sheet 321b will be described. The second core sheet 321b positions and fixes the first core sheet 321a and has a role as a supporting base.

  As shown in FIG. 32, the second core sheet 321b has a shaft hole 326 at a substantially central portion, and similarly to the first core sheet 321a, the first slit portion 322a and the second slit portion 322b ( An air layer) is formed. However, the second core sheet 321b has an outer peripheral iron core portion between the outer peripheral portion and the first slit portion 322a and the second slit portion 322b (air layer), and is not divided. The configuration is the same as the core sheet of the rotor core 521 of the general reluctance motor 500 shown in FIG.

  The second core sheet 321b is provided mainly for fixing the main core portion laminated by the first core sheet 321a composed of the divided outer divided iron core 321a-1 and inner divided iron core 321a-2. It is done. The outer divided iron core 321a-1 and the inner divided iron core 321a-2 are in a disjoint state, and are integrated for the first time by being fixed with a caulking 323 together with an undivided second core sheet 321b. .

  In addition, since the second core sheet 321b is formed with the first slit portion 322a and the second slit portion 322b (air layer) similarly to the first core sheet 321a, the second core sheet 321b As compared with the second core sheet 121b and the second core sheet 221b of the rotor 220, there is an advantage that the q-axis magnetic flux hardly passes.

  However, the second core sheet 321b has an outer peripheral core part between the outer peripheral part and the first slit part 322a and the second slit part 322b (air layer), and q-axis magnetic flux leaks through this outer peripheral core part. Therefore, the number of the second core sheets 321b is within a range in which the strength necessary for fixing the divided portions (the outer divided iron core 321a-1 and the inner divided iron core 321a-2) of the first core sheet 321a can be maintained. It is preferable to have as few as possible. In addition, it is preferable that the stator core 311 is located outside the axial end surface so that the q-axis magnetic flux does not easily pass.

  The second core sheet 321b is provided with caulking 323 connected to the first core sheet 321a at a total of 12 locations.

  The thus configured rotor core 321 is sandwiched between end plates 325 (see FIG. 30) at both ends of the rotor core 321 and fixed to the rotating shaft 324 by press fitting, shrink fitting, or the like.

  In the above description, the example in which the rotor core 321 is provided with the second core sheet 321b at both axial ends of the first core sheet 321a has been described, but the second core is also provided between the first core sheets 321a. A sheet 321b may be provided.

  Next, a reluctance motor 400 of Modification 3 will be described with reference to FIGS. 33 to 38. The reluctance motor 400 of Modification 3 is different from the reluctance motor 100 in the configuration of the rotor 420. In the rotor 120 of the reluctance motor 100, the second core sheet 121b is formed of a disk without a slit. However, in the reluctance motor 400 of the third modification, the first core sheet 421b also has the first slit. A portion 422a and a second slit portion 422b are provided, and the rotor core 421 is laminated and fixed by rivets.

  As shown in FIG. 33, a reluctance motor 400 (hereinafter sometimes simply referred to as a motor) includes a cylindrical stator 410 and a gap having a predetermined radial dimension on the inner periphery of the cylindrical stator 410. 416 (see FIG. 34). The reluctance motor 400 is, for example, a 4-pole motor.

  The length of the gap 416 in the radial direction is, for example, about 0.5 mm (0.2 to 1 mm).

  The stator 410 of the reluctance motor 400 has the same configuration as the stator 110 shown in FIGS.

  As shown in FIG. 35, the rotor 420 includes a rotor core 421 in which two types of core sheets (first core sheet 421a and second core sheet 421b) are stacked, and both axial end surfaces of the rotor core 421. And an end plate 425 (see FIG. 36) fixed to the rotor core 421 and a rotating shaft 424 fitted to substantially the center of the end plate 425.

  The rotor core 421 uses two types of core sheets (a first core sheet 421a and a second core sheet 421b). As shown in FIG. 37, since the first core sheet 421a does not have an outer peripheral iron core portion, the outer divided iron core 421a-1 and the inner divided iron core 421a-2 are not connected (separated). .

  The first core sheet 421a and the second core sheet 421b are formed by punching and laminating electromagnetic steel sheets having a high magnetic permeability and having a thickness of about t = 0.5 mm (0.1 to 1 mm) into a predetermined shape by pressing. The hole 423 is fixed through a rivet (not shown). Processing may be laser cutting.

  The outer divided iron core 421a-1 is formed in an arc shape opposite to the outer circumference circle, and the apex of the arc faces the center of the rotor iron core 421. The outer divided iron core 421a-1 has an arc shape that follows the flow of the d-axis magnetic flux. The center of the outer divided iron core 421a-1 in the circumferential direction substantially coincides with the q axis. Since the reluctance motor 400 has four poles, the four outer divided iron cores 421a-1 are arranged at substantially equal intervals in the circumferential direction. A space between the arc shape of the outer divided iron core 421a-1 and the virtual outer circumference circle is a space, which is the first slit portion 422a. The first slit portion 422a serves as a resistance for the flow of the q-axis magnetic flux, and reduces the q-axis inductance Lq.

  The four outer divided iron cores 421a-1 are stacked by being fixed by rivets at two rivet holes 423, respectively. Since positioning is difficult if there is only one rivet hole 423, two or more rivet holes 423 are preferable.

  A substantially cross-shaped inner divided core 421a-2 is provided inside the four outer divided cores 421a-1. The inner divided iron core 421a-2 has a shaft hole 426 into which the rotating shaft 424 is fitted at the center. A portion of the outer periphery of the inner divided iron core 421a-2 facing the outer divided iron core 421a-1 is formed in an arc shape opposite to the outer circumference circle, similarly to the outer divided iron core 421a-1. The vertex is directed to the center of the rotor core 421. And the circular arc of the outer periphery of the inner side divided iron core 421a-2 has comprised the substantially concentric circle with the circular arc of the outer side divided iron core 421a-1. The number of arc portions of the inner divided core 421a-2 facing the outer divided core 421a-1 is the same as the number (four) of the outer divided core 421a-1.

  In the inner divided iron core 421a-2, the iron core along the arc portion facing the outer divided iron core 421a-1 is a magnetic path of d-axis magnetic flux. Moreover, the 2nd slit part 422b of the circular arc shape which is space exists between the outer side division | segmentation iron core 421a-1 and the inner side division | segmentation iron core 421a-2. The arc part of the inner divided iron core 421a-2 and the center of the second slit part 422b substantially coincide with the q axis.

  Between the outer divided core 421a-1 and the inner divided core 421a-2, there is an arc-shaped second slit portion 422b that is a space. Therefore, the second slit portion 422b is used for the flow of the q-axis magnetic flux. It becomes resistance, and the q-axis inductance Lq is reduced.

  The inner divided iron core 421a-2 is fixed to the rivet hole 423 through a rivet in the vicinity of the outer periphery of the iron core portion protruding in the d-axis direction at the four crosses.

  In other words, regarding the configuration of the first core sheet 421a, the first core sheet 421a follows a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction. The outer divided iron core 421a-1 and the inner divided iron core 421a-2 are divided.

  Here, the outer divided iron core 421a-1 is shown as an example, but a plurality of outer divided iron cores 421a-1 are formed in an arc shape opposite to the outer circumference circle, and the apex of the arc faces the center of the rotor core 421. It may be constituted by an arc-shaped divided iron core having a substantially concentric circle. The division | segmentation of the 1st core sheet | seat 421a should just be 1 layer or more.

  The outer divided iron core 421a-1, the inner divided iron core 421a-2, and the divided first slit portion 422a and second slit portion 422b (air layer) of the first core sheet 421a flow of magnetic flux. In consideration of the direction, it is preferable to form an arc along the magnetic path from one d-axis to the other d-axis as described above, but it may be V-shaped or U-shaped.

  As shown in FIG. 36, in the rotor core 421, the main core portion laminated by the first core sheet 421a is located at the center, and both end portions (both axial end portions) are sandwiched by the second core sheet 421b. doing. It is preferable that the axial length of the main core portion laminated by the first core sheet 421a is longer than the axial length of the stator core 411. This is to reduce the q-axis inductance Lq.

  Next, the second core sheet 421b will be described. The second core sheet 421b functions as a base to support and fix the first core sheet 421a.

  As shown in FIG. 38, the second core sheet 421b has a shaft hole 426 in a substantially central portion, and similarly to the first core sheet 421a, the first slit portion 422a and the second slit portion 422b ( An air layer) is formed. However, the second core sheet 421b has an outer peripheral iron core portion between the outer peripheral portion and the first slit portion 422a and the second slit portion 422b (air layer), and is not divided. The configuration is the same as the core sheet of the rotor core 521 of the general reluctance motor 500 shown in FIG. 5 (except for the rivet hole 423).

  The second core sheet 421b is mainly provided to fix the main core portion laminated by the first core sheet 421a composed of the divided outer divided iron core 421a-1 and inner divided iron core 421a-2. It is done. The outer divided iron core 421a-1 and the inner divided iron core 421a-2 are in a disjoint state, and are integrated only by being fixed to the rivet hole 423 through a rivet together with an undivided second core sheet 421b. It becomes.

  In addition, since the second core sheet 421b is formed with the first slit portion 422a and the second slit portion 422b (air layer) similarly to the first core sheet 421a, the second core sheet 421b As compared with the second core sheet 121b and the second core sheet 221b of the rotor 220, there is an advantage that the q-axis magnetic flux hardly passes.

  However, the second core sheet 421b has an outer peripheral core portion between the outer peripheral portion and the first slit portion 422a and the second slit portion 422b (air layer), and q-axis magnetic flux leaks through the outer peripheral core portion. Therefore, the number of the second core sheets 421b is within a range in which the strength necessary for fixing the divided portions (the outer divided iron core 421a-1 and the inner divided iron core 421a-2) of the first core sheet 421a can be maintained. It is preferable to have as few as possible. In addition, it is preferable to be located on the outer side from the axial end surface of the stator core 411 so that the q-axis magnetic flux does not easily pass.

  The second core sheet 421b is provided with twelve rivet holes 423 connected to the first core sheet 421a.

  The thus configured rotor core 421 is sandwiched between end plates 425 (see FIG. 36) at both ends of the rotor core 421 and fixed to the rotating shaft 424 by press fitting, shrink fitting, or the like.

  In the above description, the example in which the rotor core 421 is provided with the second core sheet 421b at both axial ends of the first core sheet 421a has been described, but the second core is also provided between the first core sheets 421a. A sheet 421b may be provided.

  Next, a reluctance motor 600 of Modification 4 will be described with reference to FIGS. 39 to 44. The reluctance motor 600 of the modification 4 differs in the structure of the rotor 620 from the reluctance motor 100. In the rotor 120 of the reluctance motor 100, the first core sheet 121 a is divided into the outer divided iron core 121 a-1 and the inner divided iron core 121 a-2, but the first core of the reluctance motor 600 of Modification 4 is used. In the sheet 621a, the outer divided iron core 621a-1 and the inner divided iron core 621a-2 are connected by a rib (connecting portion).

  As shown in FIG. 39, a reluctance motor 600 (hereinafter sometimes simply referred to as a motor) includes a cylindrical stator 610 and a gap having a predetermined radial dimension on the inner periphery of the cylindrical stator 610. Rotator 620 disposed via 616 (see FIG. 40). The reluctance motor 600 is, for example, a 4-pole motor.

  The length of the gap 616 in the radial direction is, for example, about 0.5 mm (0.2 to 1 mm).

  The stator 610 of the reluctance motor 600 has the same configuration as the stator 110 shown in FIGS.

  As illustrated in FIG. 41, the rotor 620 includes a rotor core 621 in which two types of core sheets (first core sheet 621a and second core sheet 621b) are stacked, and both axial end surfaces of the rotor core 621. And an end plate 625 (see FIG. 42) fixed to the rotor core 621 and a rotating shaft 624 fitted to substantially the center of the end plate 625.

  The rotor core 621 uses two types of core sheets (a first core sheet 621a and a second core sheet 621b). As shown in FIG. 43, the first core sheet 621a does not have an outer peripheral iron core, but the outer divided iron core 621a-1 and the inner divided iron core 621a-2 are formed along the q-axis direction. They are connected by ribs 621a-3 (connecting portions) (not separated).

  The first core sheet 621a and the second core sheet 621b are formed by stamping and laminating electromagnetic steel sheets having a high magnetic permeability with a thickness of about t = 0.5 mm (0.1 to 1 mm) into a predetermined shape. It is fixed with caulking 623. Processing may be laser cutting.

  The outer divided iron core 621 a-1 is formed in an arc shape opposite to the outer circumference circle, and the apex of the arc is directed to the center of the rotor iron core 621. The outer divided iron core 621a-1 has an arc shape that follows the flow of the d-axis magnetic flux. The center of the outer divided iron core 621a-1 in the circumferential direction substantially coincides with the q axis. Since the reluctance motor 600 has four poles, the four outer divided iron cores 621a-1 are arranged at substantially equal intervals in the circumferential direction. A space between the arc shape of the outer divided iron core 621a-1 and the virtual outer circumference circle is a space, which is the first slit portion 622a. The first slit portion 622a serves as a resistance to the flow of the q-axis magnetic flux and reduces the q-axis inductance Lq.

  A substantially cross-shaped inner divided core 621a-2 is provided inside the four outer divided cores 621a-1. The inner divided iron core 621a-2 has a shaft hole 626 into which the rotation shaft 624 is fitted at the center. A portion of the outer periphery of the inner divided iron core 621a-2 facing the outer divided iron core 621a-1 is formed in an arc shape opposite to the outer circumference circle in the same manner as the outer divided iron core 621a-1. The vertex is directed to the center of the rotor core 621. And the circular arc of the outer periphery of the inner side divided iron core 621a-2 has comprised the substantially concentric circle with the circular arc of the outer side divided iron core 621a-1. The number of arc portions of the inner divided iron core 621a-2 facing the outer divided iron core 621a-1 is the same as the number (four) of the outer divided iron cores 621a-1.

  In the inner divided iron core 621a-2, the iron core along the arc portion facing the outer divided iron core 621a-1 is a magnetic path of d-axis magnetic flux. In addition, an arc-shaped second slit portion 622b that is a space exists between the outer divided core 621a-1 and the inner divided core 621a-2. The arc part of the inner divided iron core 621a-2 and the center of the second slit part 622b substantially coincide with the q axis.

  Between the outer divided core 621a-1 and the inner divided core 621a-2, there is an arc-shaped second slit portion 622b that is a space. Therefore, the second slit portion 622b is used for the flow of the q-axis magnetic flux. It becomes resistance, and the q-axis inductance Lq is reduced.

  The inner divided iron core 621a-2 is fixed by caulking 623 in the vicinity of the outer periphery of the iron core portion protruding in the d-axis direction at the four crosses.

  The ribs 621a-3 provided on the first core sheet 621a are arranged along the q-axis direction at substantially the center of the core (outer divided iron core 621a-1 and inner divided iron core 621a-2) divided in the d-axis direction. Is provided. The rib 621a-3 includes a substantially central portion of the arc-shaped inner peripheral surface of the outer divided iron core 621a-1 and a substantially central portion of the arc-shaped outer peripheral surface facing the outer divided iron core 621a-1 of the inner divided iron core 621a-2. Are linked.

  The circumferential width of the rib 621a-3 is about the thickness (0.1 to 1 mm) of the electromagnetic steel sheet, for example, 0.5 mm. Since the rib 621a-3 is formed in the q-axis direction, it becomes a magnetic path of the q-axis magnetic flux. Accordingly, the circumferential width of the rib 621a-3 is preferably as narrow as possible, and it is preferable to configure the rib 621a-3 on the inner diameter side of the rotor core 621 because the magnetic resistance increases.

  As shown in FIG. 43, a caulking 623 for laminating and fixing the first core sheet 621a is provided on the extension line in the q-axis direction of the rib 621a-3 of the first core sheet 621a. Since the caulking 623 presses and fixes the iron core portion, stress and strain are generated in the iron core portion of the caulking 623, the magnetic permeability of the iron core is deteriorated, and the magnetic flux does not easily pass. Therefore, by providing the caulking 623 on the extension line in the q-axis direction of the rib 621a-3, the q-axis magnetic flux passing through the rib 621a-3 can be made difficult to pass, and Lq can be reduced.

  Here, the outer divided iron core 621a-1 is shown as an example, but a plurality of outer iron cores 621a-1 are formed in an arc shape opposite to the outer circumference circle, and the apex of the arc faces the center of the rotor core 621. It may be constituted by an arc-shaped divided iron core having a substantially concentric circle. In that case, each outer divided iron core is connected to another adjacent outer divided iron core or inner divided iron core 621a-2 by a rib. The division | segmentation of the 1st core sheet | seat 621a should just be 1 layer or more.

  The outer divided iron core 621a-1, the inner divided iron core 621a-2, and the divided first slit portion 622a and second slit portion 622b (air layer) of the first core sheet 621a flow magnetic flux. In consideration of the direction, it is preferable to form an arc along the magnetic path from one d-axis to the other d-axis as described above, but it may be V-shaped or U-shaped.

  As shown in FIG. 42, in the rotor core 621, the main core portion laminated by the first core sheet 621a is located in the center, and both end portions (both axial end portions) are sandwiched by the second core sheet 621b. doing. It is preferable that the axial length of the main core portion laminated by the first core sheet 621a is longer than the axial length of the stator core 611. This is to reduce the q-axis inductance Lq.

  Next, the second core sheet 621b will be described. The second core sheet 621b positions and reinforces the first core sheet 621a and has a role as a supporting base.

  As shown in FIG. 44, the second core sheet 621b is a disc having a shaft hole 626 at a substantially central portion. The first core sheet 621a is temporarily integrated by the rib 621a-3, but the rib 621a-3 has a circumferential width that is about the thickness (0.1 to 1 mm) of the electromagnetic steel sheet, so that the strength is high. Weak to By fixing both axial end portions of the main core portion laminated with the first core sheet 621a with the second core sheet 621b, a rigid rotor core 621 is obtained.

  The second core sheet 621b is provided with caulking 623 connected to the first core sheet 621a at a total of eight locations. That is, a total of four caulking 623 provided on the four outer divided iron cores 621a-1 of the first core sheet 621a and caulking 623 provided on the inner divided iron core 621a-2 of the first core sheet 621a. There are four.

  The thus configured rotor core 621 is sandwiched between end plates 625 (see FIG. 42) at both ends of the rotor core 621 and fixed to the rotating shaft 624 by press fitting, shrink fitting, or the like.

  Further, the rotor core 621 configured in this manner supports the divided portions (the outer divided iron core 621a-1 and the inner divided iron core 621a-2) by the ribs 621a-3 in the first core sheet 621a. The strength is improved and the outer divided iron core 621a-1 and inner divided iron core 621a-2 divided by the ribs 621a-3 can be positioned. Therefore, the number of caulking 623 used for positioning can be reduced. The rotor core 621 with good productivity can be obtained by making it easy to pass the d-axis magnetic flux.

  Needless to say, in the reluctance motor 600 according to the fourth modification, rivets may be used for stacking the core sheets.

  Moreover, you may provide the slit part of the same shape as the 1st slit part 622a of the 1st core sheet 621a, and the 2nd slit part 622b in the 2nd core sheet 621b.

  In the above description, the example in which the rotor core 621 is provided with the second core sheet 621b at both axial ends of the first core sheet 621a has been described, but the second core is also provided between the first core sheets 621a. A sheet 621b may be provided.

  Next, a reluctance motor 700 of Modification 5 will be described with reference to FIGS. 45 to 52. In the rotors 120 to 620, the first core sheets 121 a to 621 a in which the iron core part is divided or the iron core parts are connected by thin ribs are replaced by the second core sheets 121 b to 621 b in which the iron core part is not divided. Integrated or reinforced. In the reluctance motor 700 according to the fifth modification, the strength of the rotor 720 is further increased by the reinforcing member 727.

  As shown in FIG. 45, a reluctance motor 700 (hereinafter sometimes simply referred to as a motor) includes a cylindrical stator 710 and a gap having a predetermined radial dimension on the inner periphery of the cylindrical stator 710. Rotator 720 disposed via 716 (see FIG. 46). The reluctance motor 700 is, for example, a 4-pole motor.

  The length of the gap 716 in the radial direction is, for example, about 0.5 mm (0.2 to 1 mm).

  The stator 710 of the reluctance motor 700 has the same configuration as the stator 110 shown in FIGS.

  As shown in FIG. 47, the rotor 720 includes a rotor core 721 in which two types of core sheets (first core sheet 721a and second core sheet 721b) are stacked, and both axial end surfaces of the rotor core 721. A reinforcing member 727 that is inserted into and fixed to the rotor core 721, and a rotating shaft 724 that fits in a substantially central portion of the rotor core 721 and the reinforcing member 727.

  The rotor core 721 uses two types of core sheets (a first core sheet 721a and a second core sheet 721b). As shown in FIG. 49, since the first core sheet 721a does not have an outer peripheral iron core portion, the outer divided iron core 721a-1 and the inner divided iron core 721a-2 are not connected (separated). .

  The first core sheet 721a and the second core sheet 721b are formed by punching and laminating electromagnetic steel sheets having a high magnetic permeability with a thickness of about t = 0.5 mm (0.1 to 1 mm) into a predetermined shape. It is fixed with caulking 723. Processing may be laser cutting.

  The outer divided iron core 721 a-1 is formed in an arc shape opposite to the outer circumference circle, and the vertex of the arc is directed to the center of the rotor iron core 721. The outer divided iron core 721a-1 has an arc shape that follows the flow of the d-axis magnetic flux. The center of the outer divided iron core 721a-1 in the circumferential direction substantially coincides with the q axis. Since the reluctance motor 700 has four poles, the four outer divided iron cores 721a-1 are arranged at substantially equal intervals in the circumferential direction. A space between the arc shape of the outer divided iron core 721a-1 and the virtual outer circumference circle is a space, which is the first slit portion 722a. The first slit portion 722a serves as a resistance for the flow of the q-axis magnetic flux, and reduces the q-axis inductance Lq.

  The four outer divided cores 721a-1 are fixed and stacked by two caulking 723, respectively. Since positioning is difficult if there is one caulking 723, two or more caulking 723 are preferable.

  Inside the four outer divided iron cores 721a-1, a substantially cross-shaped inner divided iron core 721a-2 is provided. The inner divided iron core 721a-2 has a shaft hole 726 into which the rotating shaft 724 is fitted at the center. A portion of the outer periphery of the inner divided iron core 721a-2 facing the outer divided iron core 721a-1 is formed in an arc shape opposite to the outer circumference circle, similarly to the outer divided iron core 721a-1, and The vertex is directed to the center of the rotor core 721. And the circular arc of the outer periphery of the inner side divided iron core 721a-2 has comprised the substantially concentric circle with the circular arc of the outer side divided iron core 721a-1. The number of arc portions of the inner divided iron core 721a-2 facing the outer divided iron core 721a-1 is the same as the number (four) of the outer divided iron cores 721a-1.

  In the inner divided iron core 721a-2, the iron core along the arc portion facing the outer divided iron core 721a-1 is a magnetic path of d-axis magnetic flux. In addition, an arc-shaped second slit portion 722b that is a space exists between the outer divided core 721a-1 and the inner divided core 721a-2. The arc portion of the inner divided iron core 721a-2 and the center of the second slit portion 722b substantially coincide with the q axis.

  Between the outer divided iron core 721a-1 and the inner divided iron core 721a-2, there is an arc-shaped second slit portion 722b that is a space. Therefore, the second slit portion 722b is the flow of the q-axis magnetic flux. It becomes resistance, and the q-axis inductance Lq is reduced.

  The inner divided iron core 721a-2 is fixed by caulking 723 in the vicinity of the outer periphery of the iron core portion protruding in the d-axis direction at the four crosses.

  In other words, regarding the configuration of the first core sheet 721a, the first core sheet 721a follows a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction. The outer divided iron core 721a-1 and the inner divided iron core 721a-2 are divided.

  Here, the outer divided iron core 721a-1 is shown as an example. However, the outer divided iron core 721a-1 is formed in an arc shape opposite to the outer circumference circle, and a plurality of arc vertices are directed to the center of the rotor iron core 721. It may be constituted by an arc-shaped divided iron core having a substantially concentric circle. The division | segmentation of the 1st core sheet 721a should just be 1 layer or more.

  The outer divided iron core 721a-1, the inner divided iron core 721a-2, and the divided first slit part 722a and second slit part 722b (air layer) of the first core sheet 721a flow magnetic flux. In consideration of the direction, it is preferable to form an arc along the magnetic path from one d-axis to the other d-axis as described above, but it may be V-shaped or U-shaped.

  As shown in FIG. 48, in the rotor core 721, the main core portion laminated by the first core sheet 721a is located at the center, and both end portions (both axial end portions) are sandwiched by the second core sheet 721b. doing. Further, a reinforcing member 727 (nonmagnetic material) is inserted and fixed at both axial ends of the rotor core 721. In the reinforcing member 727, an insertion portion 727b (see FIG. 52) having substantially the same shape as the first slit portion 622a and the second slit portion 622b is erected from a disc-shaped end plate portion 727a (see FIG. 52). ing. The insertion portion 727b of the reinforcing member 727 is inserted into the first slit portion 622a and the second slit portion 622b (see also FIG. 51) of the rotor core 721 (first core sheet 721a, second core sheet 721b). Fixed. The disc-shaped end plate portion 727a (see FIG. 52) of the reinforcing member 727 has a function substantially equivalent to the end plate 125 of the rotor 120, for example.

  It is preferable that the axial length of the main core portion laminated by the first core sheet 721a is longer than the axial length of the stator core 711. This is to reduce the q-axis inductance Lq.

  Next, the second core sheet 721b will be described. The second core sheet 721b positions and fixes the first core sheet 721a and has a role as a supporting base.

  As shown in FIG. 50, the second core sheet 721b has a shaft hole 726 in a substantially central portion, and similarly to the first core sheet 721a, the first slit portion 722a and the second slit portion 722b ( An air layer) is formed. However, the second core sheet 721b has an outer peripheral iron core portion between the outer peripheral portion and the first slit portion 722a and the second slit portion 722b (air layer), and is not divided. The configuration is the same as the core sheet of the rotor core 521 of the general reluctance motor 500 shown in FIG.

  The second core sheet 721b is provided mainly for fixing a main core portion laminated by the first core sheet 721a composed of the divided outer divided core 721a-1 and inner divided core 721a-2. It is done. The outer divided iron core 721a-1 and the inner divided iron core 721a-2 are in a disjoint state, and are integrated only by being fixed with a caulking 723 together with the second core sheet 721b that is not divided. .

  In addition, since the second core sheet 721b is formed with the first slit portion 722a and the second slit portion 722b (air layer) similarly to the first core sheet 721a, the second core sheet 721b As compared with the second core sheet 121b and the second core sheet 221b of the rotor 220, there is an advantage that the q-axis magnetic flux hardly passes.

  However, the second core sheet 721b has an outer peripheral core portion between the outer peripheral portion and the first slit portion 722a and the second slit portion 722b (air layer), and q-axis magnetic flux leaks through the outer peripheral core portion. Therefore, the number of the second core sheets 721b is within a range in which the strength necessary for fixing the divided portions (the outer divided core 721a-1 and the inner divided core 721a-2) of the first core sheet 721a can be maintained. It is preferable to have as few as possible. In addition, it is preferable to be located on the outer side from the axial end surface of the stator core 711 so that the q-axis magnetic flux hardly passes.

  In the second core sheet 721b, caulking 723 connected to the first core sheet 721a is provided in 12 places in total.

  The rotor core 721 has a reinforcing member 727 inserted and fixed at both axial ends of the rotor core 321, and a rotary shaft 324 is fixed by press-fitting, shrink fitting, or the like. By inserting and fixing the reinforcing members 727 at both axial ends of the rotor core 321, the strength of the rotor core 721 is significantly improved.

  Needless to say, in the reluctance motor 700 of the modified example 5, rivets may be used for stacking the core sheets.

  In the above description, the rotor core 721 has described the example in which the second core sheet 721b is provided at both axial ends of the first core sheet 721a, but the second core is also provided between the first core sheets 721a. A sheet 721b may be provided.

  Next, a reluctance motor 800 of Modification 6 will be described with reference to FIGS. 53 to 58. In the reluctance motor 700 of the modification 5, the strength of the rotor 720 is improved by the reinforcing member 727. However, the reluctance motor 800 of the modification 6 is integrally formed with a mold resin.

  As shown in FIG. 53, a reluctance motor 800 (hereinafter sometimes simply referred to as a motor) includes a cylindrical stator 810 and a gap having a predetermined radial dimension on the inner periphery of the cylindrical stator 810. 816 (see FIG. 54). The reluctance motor 800 is, for example, a 4-pole motor.

  The length of the gap 816 in the radial direction is, for example, about 0.5 mm (0.2 to 1 mm).

  The stator 810 of the reluctance motor 800 has the same configuration as the stator 110 shown in FIGS.

  As shown in FIG. 55, the rotor 820 includes a rotor core 821 in which two types of core sheets (a first core sheet 821a and a second core sheet 821b) are stacked, and a mold for integrally forming the rotor core 821. Resin 828 and a rotation shaft 824 fitted to substantially the center of the rotor core 821 are provided.

  The rotor core 821 uses two types of core sheets (a first core sheet 821a and a second core sheet 821b). As shown in FIG. 57, since the first core sheet 821a does not have an outer peripheral iron core portion, the outer divided iron core 821a-1 and the inner divided iron core 821a-2 are not connected (separated). .

  The first core sheet 821a and the second core sheet 821b are formed by punching and laminating electromagnetic steel sheets having a high magnetic permeability with a thickness of about t = 0.5 mm (0.1-1 mm) into a predetermined shape. It is fixed with caulking 823. Processing may be laser cutting.

  The outer divided iron core 821a-1 is formed in an arc shape opposite to the outer circumference circle, and the apex of the arc faces the center of the rotor iron core 821. The outer divided iron core 821a-1 has an arc shape that follows the flow of the d-axis magnetic flux. The center of the outer divided iron core 821a-1 in the circumferential direction substantially coincides with the q axis. Since the reluctance motor 800 has four poles, the four outer divided iron cores 821a-1 are arranged at substantially equal intervals in the circumferential direction. A space between the arc shape of the outer divided iron core 821a-1 and the virtual outer circumference circle is a space, which is the first slit portion 822a. The first slit portion 822a provides resistance to the flow of the q-axis magnetic flux, and reduces the q-axis inductance Lq.

  The four outer divided cores 821a-1 are fixed and stacked by two caulking 823, respectively. Since positioning is difficult if there is one caulking 823, two or more caulking 823 are preferable.

  A substantially cross-shaped inner divided core 821a-2 is provided inside the four outer divided cores 821a-1. The inner divided iron core 821a-2 is formed with a shaft hole 826 into which the rotation shaft 824 is fitted at the center. A portion facing the outer divided core 821a-1 on the outer periphery of the inner divided core 821a-2 is formed in an arc shape opposite to the outer peripheral circle in the same manner as the outer divided core 821a-1. The vertex is directed to the center of the rotor core 821. And the circular arc of the outer periphery of inner division | segmentation iron core 821a-2 has comprised the substantially concentric circle with the circular arc of outer division | segmentation iron core 821a-1. The number of arc portions of the inner divided core 821a-2 facing the outer divided core 821a-1 is the same as the number (four) of the outer divided core 821a-1.

  In the inner divided iron core 821a-2, the iron core along the arc portion facing the outer divided iron core 821a-1 is a magnetic path of the d-axis magnetic flux. In addition, an arc-shaped second slit portion 822b, which is a space, exists between the outer divided core 821a-1 and the inner divided core 821a-2. The center of the arc portion of the inner divided iron core 821a-2 and the second slit portion 822b substantially coincides with the q axis.

  Since the arc-shaped second slit portion 822b that is a space exists between the outer divided core 821a-1 and the inner divided core 821a-2, the second slit 822b It becomes resistance, and the q-axis inductance Lq is reduced.

  The inner divided iron core 821a-2 is fixed by caulking 823 in the vicinity of the outer periphery of the iron core portion that protrudes in the d-axis direction at the four positions of the cross.

  In other words, regarding the configuration of the first core sheet 821a, the first core sheet 821a follows a magnetic path from one d-axis to the other d-axis so as to prevent the flow of magnetic flux in the q-axis direction. The outer divided iron core 821a-1 and the inner divided iron core 821a-2 are divided.

  Here, the outer divided iron core 821a-1 is shown as an example, but a plurality of outer cores 821a-1 are formed in an arc shape opposite to the outer circumference circle, and the apex of the arc faces the center of the rotor core 821. It may be constituted by an arc-shaped divided iron core having a substantially concentric circle. The division | segmentation of the 1st core sheet 821a should just be 1 layer or more.

  The outer divided iron core 821a-1, the inner divided iron core 821a-2, and the divided first slit portion 822a and second slit portion 822b (air layer) of the first core sheet 821a flow of magnetic flux. In consideration of the direction, it is preferable to form an arc along the magnetic path from one d-axis to the other d-axis as described above, but it may be V-shaped or U-shaped.

  As shown in FIG. 56, in the rotor core 821, the main core portion laminated by the first core sheet 821a is located at the center, and both end portions (both axial end portions) are sandwiched by the second core sheet 821b. doing. Further, the rotor core 821 is integrally formed with a mold resin 828 together with the rotation shaft 824. The mold resin 828 is filled in the slit portions (first slit portion 822a and second slit portion 822b) of the first core sheet 821a and the second core sheet 821b, and both axial end surfaces of the rotor core 821 Cover. Since it is integrally formed with the mold resin 828 together with the rotating shaft 824, the strength of the rotor core 821 is significantly improved.

  It is preferable that the axial length of the main core portion laminated by the first core sheet 821a is longer than the axial length of the stator core 811. This is to reduce the q-axis inductance Lq.

  Next, the second core sheet 821b will be described. The second core sheet 821b positions and fixes the first core sheet 821a and has a role as a supporting base.

  As shown in FIG. 58, the second core sheet 821b has a shaft hole 826 at a substantially central portion, and similarly to the first core sheet 821a, the first slit portion 822a and the second slit portion 822b ( An air layer) is formed. However, the second core sheet 821b has an outer peripheral iron core portion between the outer peripheral portion and the first slit portion 822a and the second slit portion 822b (air layer), and is not divided. The configuration is the same as the core sheet of the rotor core 521 of the general reluctance motor 500 shown in FIG.

  The second core sheet 821b is provided mainly for fixing the main core portion laminated by the first core sheet 821a composed of the divided outer divided core 821a-1 and inner divided core 821a-2. It is done. The outer divided iron core 821a-1 and the inner divided iron core 821a-2 are in a disjoint state, and are integrated for the first time by being fixed with a caulking 823 together with an unshaped divided second core sheet 821b. .

  In addition, since the second core sheet 821b is formed with the first slit portion 822a and the second slit portion 822b (air layer) as in the case of the first core sheet 821a, As compared with the second core sheet 121b and the second core sheet 221b of the rotor 220, there is an advantage that the q-axis magnetic flux hardly passes.

  However, the second core sheet 821b has an outer peripheral core portion between the outer peripheral portion and the first slit portion 822a and the second slit portion 822b (air layer), and q-axis magnetic flux leaks through the outer peripheral core portion. Therefore, the number of the second core sheets 821b is within a range in which the strength necessary for fixing the divided portions (the outer divided iron core 821a-1 and the inner divided iron core 821a-2) of the first core sheet 821a can be maintained. It is preferable to have as few as possible. In addition, it is preferable to be located on the outer side from the axial end surface of the stator core 811 so that the q-axis magnetic flux does not easily pass.

  The second core sheet 821b is provided with caulking 823 connected to the first core sheet 821a at a total of 12 locations.

  Since the rotor core 821 is integrally formed with the mold 828 together with the rotation shaft 824, the strength of the rotor core 821 is significantly improved.

  Needless to say, in the reluctance motor 700 of the modified example 5, rivets may be used for stacking the core sheets.

  Moreover, the 1st core sheet 821a is the 1st core sheet 621a of the modification 4. Even if the outer side division | segmentation iron core 621a-1 and the inner side division | segmentation iron core 621a-2 are connected with the rib (connection part). Good.

  In the above description, the rotor core 821 has been described as providing the second core sheet 821b at both axial ends of the first core sheet 821a. However, the second core is also provided between the first core sheets 821a. A sheet 821b may be provided.

  As shown in FIG. 59, the second core sheet 821b is a second core having resin injection holes 929a and 929b instead of the first slit portion 822a and the second slit portion 822b (air layer). The sheet 921b may be used. At this time, the resin injection hole 929a communicates with the first slit portion 822a of the first core sheet 821a, and the resin injection hole 929b communicates with the second slit portion 822b of the first core sheet 821a. The caulking 923 and the shaft hole 926 of the second core sheet 921b are the same as the caulking 823 and the shaft hole 826 of the second core sheet 821b.

  As an application example of the reluctance motor of the present invention, for example, when used as a compressor motor of an air conditioner, the performance of the air conditioner can be improved without increasing the cost.

  100 reluctance motor, 110 stator, 111 stator core, 112 core back, 113 winding, 113a coil end, 114 teeth, 114a tip, 115 slot, 116 gap, 117 slot opening, 120 rotor, 121 rotor core 121a 1st core sheet, 121a-1 outer divided iron core, 121a-2 inner divided iron core, 121b second core sheet, 122a first slit part, 122b second slit part, 123 caulking, 124 rotating shaft, 125 end plate, 126 shaft hole, 200 reluctance motor, 210 stator, 211 stator core, 216 gap, 220 rotor, 221 rotor core, 221a first core sheet, 221a-1 outer divided core, 221a-2 Inner split iron core, 221b 2nd Core sheet, 222a 1st slit part, 222b 2nd slit part, 223 rivet hole, 224 rotation shaft, 225 end plate, 226 shaft hole, 300 reluctance motor, 310 stator, 311 stator core, 316 gap, 320 Rotor, 321 Rotor core, 321a first core sheet, 321a-1 outer divided core, 321a-2 inner divided core, 321b second core sheet, 322a first slit, 322b second slit, 323 Caulking, 324 Rotating shaft, 325 End plate, 326 Shaft hole, 400 Reluctance motor, 410 Stator, 411 Stator core, 416 Air gap, 420 Rotor, 421 Rotor core, 421a First core sheet, 421a-1 Outer split iron core, 421a-2 Inner split iron core, 421b 2nd Core sheet, 422a 1st slit part, 422b 2nd slit part, 423 rivet hole, 424 rotation shaft, 425 end plate, 426 shaft hole, 500 reluctance motor, 510 stator, 511 stator core, 512 core back, 513 Winding, 514 Teeth, 515 Slot, 520 Rotor, 521 Rotor Core, 522a First Slit, 522b Second Slit, 523 Caulking, 524 Rotating Shaft, 525 End Plate, 600 Reluctance Motor, 610 Fixed 611 stator core, 616 gap, 620 rotor, 621 rotor core, 621a first core sheet, 621a-1 outer split core, 621a-2 inner split core, 621a-3 rib, 621b second core Sheet, 622a First slit, 622b Second slit portion, 623 caulking, 624 rotation shaft, 625 end plate, 626 shaft hole, 700 reluctance motor, 710 stator, 711 stator core, 716 gap, 720 rotor, 721 rotor core, 721a first Core sheet, 721a-1 outer divided iron core, 721a-2 inner divided iron core, 721b second core sheet, 722a first slit part, 722b second slit part, 723 caulking, 724 rotation shaft, 726 shaft hole, 727 Reinforcing member, 800 Reluctance motor, 810 Stator, 811 Stator core, 816 Air gap, 820 Rotor, 821 Rotor core, 821a First core sheet, 821a-1 Outer split core, 821a-2 Inner split core, 821b Second core sheet, 822a First slit, 822b Second slit portion, 823 crimp, 824 rotation shaft, 826 shaft hole, 828 mold resin, 921b Second core sheet, 923 crimp, 926 shaft hole, 929a resin injection hole, 929b resin injection hole.

Claims (7)

In reluctance motor having a rotor in a stator which Ru is generated a rotating magnetic field,
The rotor core of the rotor is
to prevent the flow of magnetic flux in the q-axis direction and from one d-axis along the magnetic path to the other d-axis is divided into a plurality of divided cores, a first of the plurality of divided cores are connected by a connecting portion Core sheet,
A slit is provided along a shape of a space existing between the plurality of divided cores of the first core sheet, and a second core sheet in which an outer peripheral core part exists between the slit and the outer peripheral part , With
And said first core sheet and said second core sheet is a product layer,
From the disc-shaped end plate portion, an insertion portion to be inserted into the space existing between the plurality of divided cores of the first core sheet and the slit of the second core sheet is erected. reluctance motor, characterized in Rukoto to have a reinforcing member of non-magnetic material. Both axial ends of the first core sheet by a predetermined number of stacked, the reluctance of claim 1, wherein the first of said second core sheet so that core sheet sandwiching is characterized in that it is arranged motor. Wherein said first core sheet laminated between, laminating between the second core sheets, the laminate of the first core sheet and the second core sheet, characterized in that the dividing line by caulking or riveting The reluctance motor according to claim 1 or 2. Reluctance motor according to any one of claims 1 to 3 wherein the connecting portion of the first core sheet is being formed along the q-axis direction. The circumferential width of the connecting portion of the first core sheet, any one of claims 1 to 4, characterized by a thickness comparable der Rukoto electromagnetic steel plates constituting the first core sheet The reluctance motor described in 1. The connecting portion of the first core sheet is formed along the q-axis direction;
In the plurality of divided cores of the first core sheet, said caulking or reluctance motor according to claim 3, wherein said rivet is characterized Rukoto provided on the q-axis direction extension line of the connecting portion. 3. The reluctance motor according to claim 2 , wherein a length of an axial direction of a rotor core portion constituted by the first core sheet is longer than an axial length of a stator core of the stator.

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