JP4602958B2 - Permanent magnet motor, hermetic compressor and fan motor - Google Patents

Description

  According to the present invention, a permanent magnet is housed in each of a plurality of magnet housing holes provided in a rotor core, and a reluctance torque and a radial excitation force are provided by providing a q-axis magnetic flux suppression hole in an interpole core portion. The present invention relates to a permanent magnet motor, a hermetic compressor, and a fan motor that are reduced in noise and vibration.

In the rotor of a compressor motor having a salient pole structure and having a permanent magnet in the rotor core, a closed space is formed by connecting the tops of the recesses between the salient pole parts with a thin-walled bridge. A rotor of an electric motor for a compressor formed by laminating a rotor core has been proposed (for example, see Patent Document 1).
JP-A-6-323292 (page 4, FIG. 2)

  The permanent magnet type motor described in Patent Document 1 is provided with a space between each pole, but this space is not formed so as to overlap the outer periphery of the rotor core of the magnet accommodation hole. It is not sufficient to suppress the magnetic flux generated by the current flowing in the stator windings when the motor is driven from flowing into the inter-core core of the rotor core, but it still increases the reluctance torque and the radial direction of the rotor core. There has been a problem such as an increase in vibration force and noise.

  The present invention has been made in order to solve the above-described problems. The rotor core has a monolithic structure, and the magnetic flux generated by the current flowing in the stator winding is the inter-pole core of the rotor core. An object of the present invention is to provide a permanent magnet motor, a hermetic compressor, and a fan motor that reduce noise and vibration by reducing reluctance torque and radial excitation force by suppressing the flow into the section.

  In addition, a permanent magnet embedded motor, a hermetic compressor, and a fan that have a rotor core having an integral structure and that can suppress distortion of induced voltage due to magnetic flux at the end of the permanent magnet disposed in the magnet insertion hole. An object is to provide a motor.

  A permanent magnet type motor according to the present invention is composed of a ring-shaped laminated iron core, and has a stator core having slots arranged in the circumferential direction and magnetic pole teeth formed between adjacent slots, and the stator. A stator in which a coil is wound around magnetic core teeth of an iron core, and an N pole in a plurality of magnet receiving holes provided in the circumferential direction inside the rotor core, facing the inner peripheral portion of the magnetic teeth of the stator via a gap. Embedded with permanent magnets alternately magnetized with S and S poles, and an interpole core portion formed between adjacent magnet accommodation holes, and provided outside the magnet accommodation holes on the outer peripheral side of the rotor core A first q-axis magnetic flux suppression hole that overlaps a part of the longitudinal direction of the magnet accommodation hole so as to close the inter-electrode core, and one longitudinal direction of the magnet accommodation hole of the first q-axis magnetic flux suppression hole. Between the part that overlaps the part and the magnet accommodation hole Characterized by comprising an inner circumferential core portion of the formed thin shape.

  With the above configuration, the permanent magnet motor of the present invention can suppress the magnetic flux generated by the permanent magnet from being short-circuited inside the rotor, and can also prevent the magnetic flux generated by the stator coil from passing through the inter-pole core. Therefore, it is possible to realize a permanent magnet type motor having a small torque ripple and suppressing vibration and noise.

Embodiment 1 FIG.
1 to 8 show the first embodiment, FIG. 1 is a cross-sectional view of a permanent magnet type motor, FIGS. 2 to 7 are partially enlarged views of the vicinity of the inter-core portion 16 of the rotor 9, and FIG. 3 is a cross-sectional view of a rotor 9. FIG.

  In FIG. 1, a ring-shaped stator core 1 is formed by punching out thin electromagnetic steel sheets having a thickness of about 0.35 to 0.5 mm one by one and laminating a predetermined number. The stator core 1 is provided with, for example, nine slots 2 that are arranged on the inner peripheral surface side in the circumferential direction and extend in the axial direction. Magnetic pole teeth 3 are formed between adjacent slots 2. The magnetic pole teeth 3 have a substantially parallel shape from the outer diameter side to the inner diameter side, and have an umbrella-like structure in which both sides spread in the circumferential direction as it becomes the tip (inner diameter side). As described above, the tip of the magnetic pole teeth 3 is formed in an umbrella shape so that the magnetic force of the permanent magnet 8 disposed on the rotor can be used efficiently and the torque can be improved. Further, cut surfaces 20 that are substantially perpendicular to the longitudinal center line (radial direction) of the magnetic teeth 3 are formed at both ends on the inner peripheral side of the magnetic teeth 3 so that the length of the gap 10 is increased. It has a structure.

  The coil 4 is a concentrated winding of a three-phase Y-connection in which a predetermined number of turns set for each model is directly wound around the magnetic pole teeth 3, and a copper wire is wound around the magnetic pole teeth 3 via insulation. The number of turns and the wire diameter of the coil 4 are determined according to the required number of rotations, torque, voltage specification, cross-sectional area of the slot 2, and the like. In the case of the present embodiment, for example, a copper wire having a wire diameter of about 0.5 mm is wound about 100 turns. The stator 5 has a coil 4 wound around the stator core 1 and the magnetic pole teeth 3.

  A rotating shaft 6 that can rotate with respect to the stator 5 is disposed on the axis of the stator 5, and a substantially circular rotor 9 is fixed to the rotating shaft 6. A gap 10 of about 0.3 to 1 mm is provided between the rotor 9 and the stator 5, and has a structure that can rotate around the rotation shaft 6.

  The rotor core 7 is configured by punching and stacking magnetic steel sheets one by one in the same manner as the stator 5. As shown in FIG. 2, six magnet housing holes 11 are arranged in the circumferential direction in the rotor core 7. Six flat plate-shaped rare earth permanent magnets 8 mainly composed of neodymium, iron, and boron, which are magnetized so that N poles and S poles are alternately inserted, are inserted in the magnet housing hole 11 and adjacent to each other. Between the matching permanent magnets 8, an interpole iron core 16 is formed.

  In addition, on the outer peripheral side of the rotor core 7, one first q-axis magnetic flux suppression hole 12 per pole overlaps with a part of the magnet housing hole 11 in the longitudinal direction so as to block the interpolar core portion 16. Is provided. Further, an outer peripheral iron core portion 13 is provided between the outer peripheral portion of the rotor core 7 and the first q-axis magnetic flux suppression hole 12, and an inner periphery is provided between the magnet housing hole 11 and the first q-axis magnetic flux suppression hole 12. By forming the iron core portion 14, the rotor iron core is configured to have an integral structure.

  The radial length of the outer peripheral core portion 13 and the radial length of the inner peripheral core portion 14 are small and thin within the allowable range of strength from the viewpoint of preventing short circuit of the magnetic flux generated by the permanent magnet 8. In the case of the present embodiment, the radial length of the outer peripheral core portion 13 and the radial length of the inner peripheral core portion 14 are both the thickness of the electromagnetic steel sheet (about 0.35 to 0.5 mm). ) And the same length.

  Further, the radial length of the first q-axis magnetic flux suppression hole 12 facing the inter-pole core portion 16 and the part of the first q-axis magnetic flux suppression hole 12 in the longitudinal direction of the magnet housing hole 11 overlap. The radial length in the vicinity of the overlapping portion to be set is not less than 1/3 of the radial length of the magnet housing hole 11, and at least the first q-axis magnetic flux suppression hole in the region A facing the interpolar core portion 16. 12 is configured such that the q-axis magnetic flux 15 emitted from the coil 4 of the stator 5 can be effectively suppressed by configuring the radial length B of 12 to be greater than the length of the gap 10.

  As described above, a part of the magnet housing hole 11 in the longitudinal direction is provided on the outer peripheral side of the rotor core 7 so that one first q-axis magnetic flux suppression hole 12 per pole covers the inter-core portion 16. Are provided so that the magnetic flux produced by the permanent magnet 8 is prevented from being short-circuited inside the rotor 9, and the magnetic flux produced by the coil 4 of the stator 5 is allowed to pass through the interpolar core 16. Since it can be suppressed, it is possible to realize a motor with low torque ripple and suppressed vibration and noise.

  Moreover, since the width | variety (circumferential direction) of the interelectrode core part 16 can be enlarged, sufficient intensity | strength with respect to a rotation direction can be ensured, and the motor corresponding to high torque is realizable. Further, it is possible to suppress the demagnetizing field generated from the coil 4 of the stator 5 from reaching both sides of the magnet, and to suppress demagnetization at the end of the permanent magnet 8.

  Further, the magnetic flux of the permanent magnet 8 can be converged in the direction of the pole center, the induced voltage distortion can be reduced, and a permanent magnet type motor with low vibration and noise can be realized.

  Moreover, since the outer diameter shape of the rotor core 7 is configured to be a substantially perfect circle, it is possible to realize a permanent magnet type motor that has good workability and assemblability and has low wind noise.

  Further, the cut surfaces 20 that are substantially perpendicular to the longitudinal center line of the magnetic teeth 3 are formed at both ends of the inner peripheral portion of the magnetic teeth 3 of the stator core 1 so that the length of the gap 10 is increased. In addition to suppressing the magnetic flux from passing through the inter-core member 16, it is possible to reduce the distortion of the induced voltage and to realize a permanent magnet type motor with low vibration and noise.

  In this embodiment, the concentrated winding of 9 slots and 6 poles has been described as an example. However, the number of slots, the number of poles, and the winding method are not limited to this, and the number of slots that can be operated in principle, A similar effect can be obtained by appropriately selecting the combination of the number of poles and the winding method (distributed winding, wave winding, etc.).

  The material of the permanent magnet 8 is not limited to the rare earth magnet, and the same effect can be obtained by appropriately configuring the permanent magnet 8 with a ferrite permanent magnet or the like according to the required output, rotation speed, and torque.

  Furthermore, the material of the stator core 1 and the rotor core 7 is not limited to the electromagnetic steel sheet, and is appropriately configured with a powdered iron core material or an alternative material according to the required output, rotation speed, and torque. Thus, the same effect can be obtained.

  Further, it goes without saying that the same effect can be obtained with any orientation direction such as parallel orientation, radial orientation, and polar orientation with respect to the orientation direction of the permanent magnet 8.

  Further, the radial length of the outer peripheral core portion 13 provided between the outer periphery of the rotor core 7 and the first q-axis magnetic flux suppression hole 12, and the magnet housing hole 11 and the first q-axis magnetic flux suppression hole 12. The length of the inner peripheral core portion 14 provided in the radial direction is a uniform length as long as the length is sufficient to withstand centrifugal force even when the rotor is driven at high speed. Or a non-uniform length.

  In this case, it is provided between the outer periphery of the rotor core 7 and the first q-axis magnetic flux suppression hole 12 as shown in a partially enlarged view near the interpolar portion of the rotor 9 in FIGS. The length of the outer peripheral core portion 13 in the radial direction and the length of the inner peripheral core portion 14 provided between the magnet housing hole 11 and the first q-axis magnetic flux suppression hole 12 in the radial direction. The length of the magnetic pole center side of the permanent magnet 8 is made to be about 1.5 to 3 times longer than the length between the poles, thereby effectively reducing the distortion of the induced voltage. Is possible.

  In the example of FIG. 3, the length in the radial direction of the inner peripheral iron core portion 14 provided between the magnet accommodation hole 11 and the first q-axis magnetic flux suppression hole 12 is set to the permanent magnet 8 with respect to the length between the poles. The length on the magnetic pole center side is made large to be about 1.5 to 3 times.

  In the example of FIG. 4, the length in the radial direction of the outer peripheral core portion 13 provided between the outer periphery of the rotor core 7 and the first q-axis magnetic flux suppression hole 12 is set to a permanent magnet with respect to the length on the interpolar side. The length of the magnetic pole center side of 8 is made large to be about 1.5 to 3 times.

  In the example of FIG. 5, the radial length of the inner peripheral core portion 14 provided between the magnet accommodation hole 11 and the first q-axis magnetic flux suppression hole 12, the outer periphery of the rotor core 7, and the first q-axis. Both of the lengths in the radial direction of the outer peripheral iron core portion 13 provided between the magnetic flux suppression holes 12 are 1.5 times to 3 times the length on the magnetic pole center side of the permanent magnet 8 with respect to the length on the interpole side. It is configured to be large.

  Further, in the present embodiment, the outer peripheral core portion 13 is provided on the outer peripheral side of the first q-axis magnetic flux suppression hole 12, and the inner peripheral core portion 14 is provided on the inner peripheral side of the first q-axis magnetic flux suppression hole 12. Although it was configured to have a structure, the present invention is not limited to this, and as shown in FIG. 6, the outer peripheral core portion 13 may be omitted as long as the inner peripheral core portion 14 is formed. Further, as shown in FIG. 7, if there is an outer peripheral core portion 13, the first q-axis magnetic flux suppression hole 12 and the magnet accommodation hole 11 may communicate with one side of the inner peripheral core portion 14 as a space.

  Further, in the present embodiment, the shape of the permanent magnet 8 is a flat plate shape, and the six magnets are arranged so as to form a hexagon in the circumferential direction. However, the number, shape, and arrangement of the magnets are limited to this. It is not something.

  Further, as shown in FIG. 8, two or more slits 17 having a width of about 1 mm are provided in the rotor core 7 on the outer peripheral side of the magnet housing hole 11 so that the interval between the slits 17 is small so that the outer peripheral side is small. By arranging in a shape, the effect of converging the magnetic flux generated by the permanent magnet 8 toward the pole center direction is improved, the distortion of the induced voltage is more effectively suppressed, the reluctance torque generated by the magnetic flux of the winding, and It is possible to reduce radial excitation force and suppress vibration and noise.

  Further, in the present embodiment, for the sake of simplification of the drawings, the corner portions are not chamfered or rounded, but the punching property can be improved by appropriately providing a chamfered portion or a rounded portion as necessary. Is improved and stress concentration can be avoided.

Embodiment 2. FIG.
FIG. 9 is a cross-sectional view of the rotor 9 showing the second embodiment.

  In the first embodiment described above, the longitudinal direction of the magnet housing hole 11 on the outer peripheral side of the rotor core 7 is such that one first q-axis magnetic flux suppression hole 12 per pole closes the inter-core portion 16. In this embodiment, in addition to this, the second q-axis magnetic flux suppression hole 18 separated from the magnet accommodation hole 11 is provided between the poles on the inner diameter side of the magnet accommodation hole 11. It was configured to overlap with a part of the magnet housing hole 11 in the longitudinal direction so as to close the iron core portion 16.

  In the first embodiment, the radial length B of the first q-axis magnetic flux suppression hole 12 provided on the outer peripheral side of the rotor 9 is equal to or larger than the length of the gap 10. The sum of the radial length B of the first q-axis magnetic flux suppression hole 12 provided and the radial length C of the second q-axis magnetic flux suppression hole 18 provided on the inner peripheral side is the diameter of the magnet housing hole 11. It is configured to be at least 1/3 of the length in the direction and at least the radial length of the gap 10.

  By configuring as described above, the same effects as those of the first embodiment can be obtained, and the second q-axis magnetic flux suppression hole 18 is provided on the inner peripheral side, so that the first q on the outer peripheral side is provided. The radial length B of the axial magnetic flux suppression hole 12 can be configured to be small, and the magnet housing hole 11 is arranged on the outer peripheral side of the rotor core 7 so that the circumferential width of the magnet housing hole 11 is increased. It becomes possible to embed a large permanent magnet 8 in the iron core 7, thereby realizing an efficient permanent magnet type motor.

Embodiment 3 FIG.
10 to 13 are diagrams showing the third embodiment, and are sectional views of the rotor 9.

  In the second embodiment, a part of the magnet housing hole 11 overlaps the outer peripheral side of the rotor core 7 so that one first q-axis magnetic flux suppression hole 12 per pole covers the inter-core portion 16. Further, a second q-axis magnetic flux suppression hole 18 separated from the magnet accommodation hole 11 is provided on the inner diameter side of the magnet accommodation hole 11 and a part of the magnet accommodation hole 11 in the longitudinal direction so as to close the interpolar core portion 16. In this embodiment, in addition to these, a third q-axis magnetic flux suppression hole 19 separated from the magnet accommodation hole 11 is provided in a portion between the adjacent magnet accommodation holes 11. The structure.

  By configuring as described above, it is possible to realize a permanent magnet motor that further improves the effect of suppressing the q-axis magnetic flux and reduces vibration and noise.

  As shown in FIG. 11, there is no second q-axis magnetic flux suppression hole 18 provided on the inner peripheral side, and the first q-axis magnetic flux suppression hole 12 provided on the outer peripheral side of the rotor core 7 and the third q The structure with the axial magnetic flux suppression hole 19 may be sufficient. Then, as shown in FIG. 11, the first q-axis magnetic flux suppression hole 12 provided on the outer peripheral side and the third q-axis magnetic flux suppression hole 19 may be connected to form an integral structure having a convex shape on the inner diameter side. .

  Also, as shown in FIG. 12, the second q-axis magnetic flux suppression hole 18 and the third q-axis magnetic flux suppression hole 19 may be connected to form an integral structure protruding outward.

  Although not shown, the same effect can be obtained by connecting the first q-axis magnetic flux suppression hole 12, the second q-axis magnetic flux suppression hole 18, and the third q-axis magnetic flux suppression hole 19 to form an integrated structure. Can be obtained.

  Further, at least one hole of the first q-axis magnetic flux suppression hole 12 on the outer peripheral side, the second q-axis magnetic flux suppression hole 18 on the inner peripheral side, or the third q-axis magnetic flux suppression hole 19 in the middle is provided. By enlarging, a part of the magnet accommodation hole 11 is configured to be smaller than the length of the permanent magnet 8, and then the permanent magnet 8 is easily fixed by pressing the permanent magnet 8 into the magnet accommodation hole 11. It is possible.

  FIG. 13 is a cross-sectional view showing a structure in which the third q-axis magnetic flux suppression hole 19 is enlarged to the magnet housing hole 11 side and a bending portion 21 is provided. The bending portion 21 does not need to be formed over the entire length of the rotor core 7 in the axial direction. If the bending portion 21 is partly configured, a sufficient holding force for fixing the permanent magnet 8 can be obtained.

Embodiment 4 FIG.
14 and 15 show the fourth embodiment. FIG. 14 is a longitudinal sectional view of the rotary compressor 30, and FIG. 15 is a transverse sectional view of the electric element 31 of the rotary compressor 30. This is an example in which the permanent magnet type motor described in the first to third embodiments is mounted on a rotary compressor (an example of a hermetic compressor).

  In the figure, the rotary compressor 30 houses an electric element 31 and a compression element 32 inside a sealed container 33. By using the permanent magnet type motor described in the first to third embodiments as the electric element 31, the magnetic flux generated by the current flowing through the stator of the permanent magnet type motor is generated in the interpole core portion 16 of the rotor core 7. Vibration and noise can be reduced by suppressing the flow.

Embodiment 5 FIG.
FIG. 16 shows the fifth embodiment, and is a cross-sectional view of the fan motor. This is an example in which the permanent magnet type motor described in the first to third embodiments is mounted on a fan motor.

  In the figure, the fan motor 50 has a mold stator 53 in which the stator 5 described in the first embodiment is molded, the rotor 9 described in the first to third embodiments, and a bearing 52 as rotational axes. The fitted rotor assembly 51 is assembled using the bracket 54.

  With such a configuration, it is possible to reduce vibration and noise by suppressing the magnetic flux generated by the current flowing through the stator 5 of the permanent magnet type motor from flowing into the inter-core portion 16 of the rotor core 7. In addition, it is possible to realize the fan motor 50 that can greatly improve the service life.

FIG. 2 is a diagram showing the first embodiment and is a cross-sectional view of a permanent magnet type motor. FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. FIG. 5 shows the first embodiment, and is a cross-sectional view of a rotor 9. FIG. 5 shows the second embodiment and is a cross-sectional view of the rotor 9. FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. FIG. 5 is a diagram illustrating the fourth embodiment, and is a longitudinal sectional view of a rotary compressor 30. FIG. FIG. 10 is a diagram showing the fourth embodiment, and is a cross-sectional view of an electric element 31 of a rotary compressor 30. FIG. 10 is a diagram illustrating the fifth embodiment and is a cross-sectional view of the fan motor 50.

Explanation of symbols

  1 Stator Core, 2 Slots, 3 Magnetic Teeth, 4 Coils, 5 Stator, 6 Rotating Shaft, 7 Rotor Core, 8 Permanent Magnet, 9 Rotor, 10 Gap, 11 Magnet Housing Hole, 12 First q-axis Magnetic flux suppression hole, 13 Outer core part, 14 Inner core part, 15 q-axis magnetic flux, 16 Interpole core part, 17 Slit, 18 Second q-axis magnetic flux suppression hole, 19 Third q-axis magnetic flux suppression hole, 20 Cut surface, 21 curved portion, 30 rotary compressor, 31 electric element, 32 compression element, 33 airtight container, 50 fan motor, 51 rotor assembly, 52 bearing, 53 mold stator, 54 bracket.

Claims (16)

A stator core made of a ring-shaped laminated core and having slots arranged in the circumferential direction and magnetic pole teeth formed between adjacent slots;
A stator in which a coil is wound around the magnetic teeth of the stator core;
A permanent magnet in which N poles and S poles are alternately magnetized in a plurality of magnet housing holes provided in the rotor core in a circumferential direction so as to face the inner peripheral portion of the magnetic pole teeth of the stator. Embedded, and a rotor in which an interelectrode core is formed between the adjacent magnet housing holes;
A first q-axis magnetic flux suppression hole that is provided on the outer peripheral side of the rotor core and outside the magnet accommodation hole and overlaps with a part of the magnet accommodation hole in the longitudinal direction so as to close the inter-electrode core portion; ,
A portion of the first q-axis magnetic flux suppression hole that overlaps a part in the longitudinal direction of the magnet accommodation hole, and a thin-walled inner peripheral iron core portion formed in the circumferential direction between the magnet accommodation hole. A thin-walled outer peripheral core portion is formed between the outer periphery of the rotor core and the first q-axis magnetic flux suppression hole, and inside the vicinity of both end portions of the first q-axis magnetic flux suppression hole. One of the pair of inner peripheral core portions formed is a space, and the rotor core is integrally structured by the other inner peripheral core portion and the outer peripheral core portion .   A radial length of a portion of the first q-axis magnetic flux suppression hole facing the inter-pole core portion and a part of the first q-axis magnetic flux suppression hole in the longitudinal direction of the magnet accommodation hole overlap. The permanent magnet type motor according to claim 1, wherein the radial length of the portion to be made is at least 1/3 of the radial length of the magnet receiving hole. Wherein the outer circumferential core portion and space, the permanent magnet type motor according to claim 1, characterized in that an integral structure of the rotor core by the inner circumferential core portion. At least one of the length in the radial direction of the outer peripheral core portion and the length in the radial direction of the inner peripheral core portion is set so that the length on the magnetic pole center side of the permanent magnet is larger than the length on the interpole side. The permanent magnet type motor according to claim 1 , wherein the permanent magnet type motor is configured as described above. A second q-axis magnetic flux suppression hole separated from the magnet accommodation hole is plugged in the interpole portion inside the magnet accommodation hole so as to close the interpole core and overlap the magnet accommodation holes on both sides. The permanent magnet type motor according to claim 1 , wherein the permanent magnet type motor is provided. A radial length of a portion of the first q-axis magnetic flux suppression hole facing the inter-electrode core and a radial length of a portion of the second q-axis magnetic flux suppression hole facing the inter-electrode core. 6. The permanent magnet motor according to claim 5 , wherein the sum is set to be not less than 1/3 of the radial length of the magnet housing hole and larger than the radial length of the gap. The permanent magnet type motor according to any one of claims 1 to 6 , wherein a third q-axis magnetic flux suppression hole separated from the magnet accommodation hole is provided between the adjacent magnet accommodation holes. The permanent magnet according to claim 7, wherein the first q-axis magnetic flux suppression hole and the third q-axis magnetic flux suppression hole are connected to form an integrated structure having a convex shape inside. Type motor. The permanent magnet according to claim 7, wherein the second q-axis magnetic flux suppression hole and the third q-axis magnetic flux suppression hole are connected to form an integral structure having an outward convex shape. Type motor. Said first q-axis magnetic flux suppression holes, and the second q-axis magnetic flux suppression holes, according to claim 7, characterized in that an integral structure by connecting the third q-axis magnetic flux suppression hole Permanent magnet type motor. The permanent magnet type motor according to any one of claims 1 to 10, wherein a plurality of slits are arranged in a radial direction in the rotor core positioned on the outer peripheral side of the magnet accommodation hole. 12. The permanent magnet type motor according to claim 11 , wherein the slits are arranged in a letter C shape such that the interval between the slits is small on the rotor outer peripheral side. By enlarging at least one of the first q-axis magnetic flux suppression hole, the second q-axis magnetic flux suppression hole, or the third q-axis magnetic flux suppression hole toward the magnet accommodation hole side, the permanent The permanent magnet is fixed by press-fitting the permanent magnet into the permanent magnet receiving hole after a part of the magnet receiving hole is configured to be smaller than the length of the permanent magnet. The permanent magnet type motor according to any one of 1 to 12 . Permanent magnet according to any one of claims 1 to 13, characterized by forming the inner peripheral surface cut surface so that the length of the gap at both end portions is increased in the magnetic pole teeth of the stator core motor. A hermetic container is provided with a compression element for compressing the refrigerant and an electric element for driving the compression element, and the permanent magnet motor according to any one of claims 1 to 14 is used for the electric element. A hermetic compressor. Fan motor, characterized in that using a permanent magnet type motor according to any one of claims 1 to 14.

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