JPWO2018016026A1 - Motor and air conditioner - Google Patents

Abstract

The motor 10 includes a first part 210 formed by laminating a plurality of soft magnetic materials, and is made of a conductive and non-magnetic material that is thicker than the soft magnetic material constituting the first part 210. The stator core 21 of the stator 20 having the first member 221 having the third surface 21c on the load side and the second portion 220 having the second member 222 having the fourth surface 21d on the anti-load side, and the stator 20 The rotor 30 is rotatably fixed so that magnetic flux flows into the stator core 21 and has a load-side fifth surface 32a and an anti-load-side sixth surface 32b. The fifth surface 32a is the third surface. The positional relationship located on the anti-load side with respect to the surface 21c and the positional relationship located on the load side with respect to the fourth surface 21d satisfy the at least one of the positional relationship located on the anti-load side.

Description

  The present invention relates to a motor and an air conditioner having the motor.

  Conventionally, a stator core of a motor is formed by laminating a plurality of soft magnetic material plates (thin plates) such as electromagnetic steel plates having a thickness within a range of 0.2 mm to 0.5 mm in the axial direction of the rotor. It is formed by fixing a soft magnetic material plate by caulking or the like.

JP 2014-155347 A (for example, paragraphs 0027 to 0031, FIG. 6)

  However, when an amorphous material plate is employed as the soft magnetic material plate, it is difficult to caulk the plurality of laminated soft magnetic material plates due to insufficient rigidity. For this reason, a fixing part is required to sandwich the plurality of laminated soft magnetic material plates in the axial direction. In general, the fixed part of the stator core is formed of a conductive material that easily causes eddy current loss. Therefore, the magnetic flux generated from the rotor core flows into the fixed part of the stator core, and eddy current is generated in the fixed part. Reduced motor efficiency.

  The present invention has been made to solve the above-described problems of the prior art, and an object thereof is to provide a motor capable of reducing eddy current loss and an air conditioner having this motor.

  A motor according to an aspect of the present invention is a motor including a stator core and a rotor core, and the stator core has a first part and a second part, and the first part is made of a soft magnetic material. A first plate made of a non-magnetic material that is electrically conductive and in contact with the first surface that is an end surface on the load side of the first portion; A second plate made of a conductive non-magnetic material in contact with a second surface which is an end surface on the side opposite to the load of the portion, wherein the first plate is one of the multilayer plates The second plate is thicker than the first thickness, and the rotor core has a fifth surface which is an end surface on the load side of the rotor core, which is an end surface on the load side of the first plate. The first condition located on the anti-load side of the third surface and the sixth surface which is the end surface on the anti-load side of the rotor core are the second plate Second condition than the fourth surface is an end of the load side located on the load side, characterized in that it is formed to satisfy at least one of.

  A motor according to another aspect of the present invention is a motor including a stator core and a rotor core, wherein the stator core has a first part and a second part, and the first part is a soft magnetic material. The second part is a first plate in contact with a first surface which is an end surface on the load side of the first part, and an end surface on the anti-load side of the first part. A second plate in contact with a second surface, wherein the first plate is thicker than a first thickness of one of the multilayer plates, and the second plate is the first plate. The second thickness from the fifth surface, which is the end surface on the load side of the rotor core, to the sixth surface, which is the end surface on the non-load side of the rotor core, is greater than the thickness, and the load on the first plate of the second part It is characterized by being thinner than the third thickness from the third surface that is the side end surface to the fourth surface that is the end surface on the anti-load side of the second plate of the second part.

  An air conditioner according to still another aspect of the present invention is an air conditioner including a blower, and the blower includes the motor described above.

  According to the motor and the air conditioner of the present invention, an effect that eddy current loss can be reduced can be obtained.

It is a longitudinal cross-sectional view which shows schematic structure of the motor which concerns on Embodiment 1 of this invention. 1 is a longitudinal cross-sectional view showing an overall schematic structure of a motor according to Embodiment 1. FIG. (A) is a longitudinal cross-sectional view which shows schematic structure of the rotor of the motor which concerns on Embodiment 1, (b) is a cross section which shows the cross section which cuts the rotor shown by Fig.3 (a) by an III-III line. FIG. FIG. 6 is a longitudinal sectional view showing a schematic structure of a motor according to a modification of the first embodiment. It is a longitudinal cross-sectional view which shows schematic structure of the motor which concerns on a comparative example. It is a longitudinal cross-sectional view which shows schematic structure of the motor which concerns on Embodiment 2 of this invention. (A) is a cross-sectional view showing a schematic structure of a motor according to Embodiment 3 of the present invention (cross section taken along line VII-VII in FIG. 7 (b)), and (b) is Embodiment 3. It is a longitudinal cross-sectional view which shows schematic structure of the motor which concerns on. It is a figure which shows schematically the structure of the air conditioner which concerns on Embodiment 4 of this invention. It is a longitudinal cross-sectional view which shows schematic structure of the motor which has SPM structure.

  Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings. In the figure, an xyz orthogonal coordinate system is shown for easy understanding of the relationship between the figures. In the figure, the x-axis is shown as an axial coordinate axis parallel to the rotation axis of the motor. In the figure, the y-axis is shown as a coordinate axis parallel to the radial direction of the motor. In the figure, the z-axis is shown as a coordinate axis orthogonal to both the x-axis and the y-axis. In the following description, the + x direction side of the motor is the “load side”, and the −x direction side of the motor is the “anti-load side”.

<< 1 >> Embodiment 1
<< 1-1 >> Configuration FIG. 1 is a longitudinal sectional view showing a schematic structure of a motor 10 according to Embodiment 1 of the present invention. As shown in FIG. 1, the motor 10 according to the first embodiment includes a stator 20 and a rotor 30. The stator 20 has a stator core 21 and windings. The rotor 30 has a shaft 31 and a rotor core 32 fixed to the shaft 31. The motor 10 includes a housing (not shown). A stator 20 is fixed to the housing, and a rotor 30 is rotatably supported by the housing via a bearing.

  The stator core 21 has a first part 210 and a second part 220. The first portion 210 includes a plurality of stacked plates (multilayer soft magnetic material plates) 211 formed of a soft magnetic material. The second part 220 includes a first member (fixed part) 221 serving as a first plate provided on the first surface 21 a that is an end surface on the load side of the first part 210, and an anti-load side of the first part 210. And a second member (fixing portion) 222 as a second plate provided on the second surface 21b which is an end surface. The thickness T221 of the first member 221 is thicker than the first thickness T211 of one plate soft magnetic material plate 211 in the multilayer soft magnetic material plate 211. Further, the thickness T222 of the second member 222 is thicker than the first thickness T211. Thus, the first member 221 and the second member 222 are arranged so as to sandwich the first portion 210 in the axial direction (x direction). The second member 222, the first portion 210, and the first member 221 are fixed by bolts and nuts or caulking, etc., in a state where they are overlapped in this order.

  The rotor core 32 has a fifth surface 32a, which is an end surface on the load side of the rotor core 32, opposite to the third surface 21c, which is an end surface on the load side (+ x direction side) of the first member 221 (on the −x direction side). And the sixth surface 32b, which is the end surface on the anti-load side of the rotor core 32, is positioned more on the load side than the fourth surface, which is the end surface on the anti-load side of the second member 222. It is formed to satisfy at least one of the above conditions. FIG. 1 shows a structure that satisfies the second condition.

  In general, the first portion 210 is composed of a soft magnetic material plate that is a thin plate mainly composed of iron (Fe) such as an electromagnetic steel plate in order to reduce eddy current loss. The first part 210 may be made of a soft magnetic material having a nanocrystal structure and an amorphous crystal structure.

  The first part 210 according to the first embodiment, for example, moves a plurality of soft magnetic material plates 211 having a predetermined plate thickness (length in the x direction) in the range of 10 μm to 200 μm in the axial direction (x Direction). As shown in FIG. 1, in the first embodiment, the first part 210 is configured by laminating ten soft magnetic material plates 211 in the x direction. In addition, the first part 210 includes a tooth portion 22 and a core back portion 23.

  Since the soft magnetic material plate 211 having a plate thickness of 200 μm or less has insufficient rigidity, it cannot be caulked. For this reason, in order to fix the laminated soft magnetic material plates 211 in the axial direction (x direction) of the shaft 31, the plate thickness is thicker than the soft magnetic material plates 211 of the first portion 210 and the degree of freedom of processing is high. With the first member 221 and the second member 222 of the second part 220 sandwiching the first part 210 (the first surface 21a and the second surface 21b of the first part) from both sides in the axial direction, These need to be fixed.

  As shown in FIG. 1, the first part 210 is sandwiched and fixed between the first member 221 and the second member 222 of the second part 220 from both sides in the axial direction. In FIG. 1, the second part 220 located on the load side of the first part 210 is the first member 221, and the second part 220 located on the non-load side of the first part 210 is the second member 222.

  In this way, when the first part 210 is sandwiched from both sides in the axial direction by the first member 221 and the second member 222 of the second part 220, the portion sandwiched in the axial direction is, for example, the first material part 210. If only the core back portion 23 is present, the tooth portion 22 of the first portion 210 that is not sandwiched between the first member 221 and the second member 222 of the second portion 220 may spread in the axial direction. Therefore, it is desirable that the first member 221 and the second member 222 of the second portion 220 have a structure in which both the core back portion 23 and the teeth portion 22 of the first portion 210 are sandwiched. The first member 221 and the second member 222 of the second material part 220 according to Embodiment 1 are configured to sandwich both the core back part 23 and the tooth part 22 of the first part 210.

  The first member 221 and the second member 222 of the second part 220 are fixed by screwing or the like with the first part 210 sandwiched in the axial direction. For this reason, it is desirable that the first member 221 and the second member 222 of the second portion 220 have mechanical strength that can withstand screwing. In addition, as described above, the first member 221 and the second member 222 of the second portion 220 are formed by connecting the first surface 21a and the second surface 21b, which are axial end surfaces of the first portion 210, as a whole (core. It is desirable to have a shape that suppresses both the back portion 23 and the teeth portion 22. Since a gap is provided between the adjacent tooth portions 22 so as to allow winding, the second portion 220 has a high degree of freedom in processing so as to cope with the unevenness caused by the gap between the adjacent tooth portions 22. It is desirable that the material has The second part 220 is a fixing part for fixing the first part 210, and is preferably made of a low-cost material.

  As shown in FIG. 1, the end surface on the anti-load side of the first member 221 is in close contact with the first surface 21 a that is the end surface on the load side of the first portion 210, and the end surface on the load side of the second member 222 is The first portion 210 is in close contact with the second surface 21b which is the end surface on the side opposite to the load.

  The second part 220 is made of, for example, a conductive and nonmagnetic material. The reason why the material constituting the second part 220 is a conductive material is that the conductive material has high mechanical strength and high degree of freedom of processing, as represented by metal and the like. Depending on what is suitable for. The reason why the material constituting the second part 220 is a non-magnetic material is that the non-magnetic material has a very low magnetic permeability, so that the magnetic flux flowing from the rotor 30 to the second part 220 can be reduced, resulting in a reduction in efficiency. This is because the generation of eddy currents that increase noise and noise can be suppressed. The second part 220 can be made of, for example, a material mainly composed of aluminum, copper, and stainless steel. Each of the first member 221 and the second member 222 of the second part 220 may be constituted by a single material plate, or may have a laminated structure in which a plurality of material layers are laminated. .

  When each of the first member 221 and the second member 222 of the second part 220 is configured by a single material plate, the plate thickness of each of the first member 221 and the second member 222 of the second part 220 is For example, it is desirable to set it as 100 mm or less. When the second part 220 has a laminated structure of a plurality of material plates, the thickness of each material plate is preferably 6 mm or less, for example. By setting the plate thickness in the second portion 220 to the above value, highly accurate processing (for example, press processing) can be performed.

  As shown in FIG. 1, the rotor core 32 of the rotor 30 has a fifth surface 32a that is an end surface on the load side and a sixth surface 32b that is an end surface on the anti-load side. The rotor core 32 has an outer peripheral surface 32c. From the outer peripheral surface 32 c of the rotor core 32, a magnetic flux is generated toward the radially outer side, and this magnetic flux flows into the stator core 21. The direction of the magnetic flux generated from the outer peripheral surface 32c of the rotor core 32 is indicated by a white arrow in FIG.

  In the motor 10 according to the first embodiment, the fifth surface 32a of the rotor core 32 is positioned on the side opposite to the load side than the third surface 21c of the first member 221 of the second part 220 of the stator core 21 (first condition). ), And the sixth surface 32b of the rotor core 32 satisfies at least one of the positional relationship (second condition) located on the load side with respect to the fourth surface 21d of the second member 222 of the second portion 220 of the stator core 21. Yes.

  As shown in FIG. 1, in the first embodiment, the sixth surface 32 b on the counterload side of the rotor core 32 is on the load side with respect to the fourth surface 21 d of the stator core 21 and more than the second surface 21 b of the stator core 21. Located on the non-load side. The fifth surface 32 a on the load side of the rotor core 32 is located on the load side with respect to the third surface 21 c of the stator core 21. Therefore, the length L1 of the portion where the second member 222 of the second portion 220 of the stator core 21 and the rotor core 32 overlap in the axial direction can be made shorter than the length L0 in the comparative example (FIG. 5) described later.

  FIG. 2 is a longitudinal sectional view showing a schematic structure of the entire motor 10 according to the first embodiment. As shown in FIG. 2, the stator core 21 of the stator 20 of the motor 10 according to the first embodiment includes an insulator in the stator core 21 having a first part 210 and a second part 220 (a first member 221 and a second member 222). 24 has a coil formed by winding a magnet wire (winding) 25 around the tooth portion 22.

  The insulator 24 is configured to insulate the magnet wire 25 and the stator core 21 from each other. The insulator 24 includes, for example, polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polyethylene terephthalate (LCP), and polyethylene terephthalate (PolyEthyl resin). Composed of paper.

  The outer surface of the stator core 21 is surrounded by a molding resin formed of a thermoplastic resin, and an insertion hole for the rotor 30 is provided at the center. The rotor 30 is rotatably fixed to the housing by a bearing 34. The stator 20 may not use a mold depending on the application. In this case, for example, it is possible to adopt a structure in which the stator core 21 is fixed by shrink fitting to a shell mainly composed of cylindrical Fe, and the rotor core 32 of the rotor 30 is rotatably fixed to the center of the stator 20. .

  3A is a longitudinal sectional view showing a schematic structure of the rotor 30 portion of the motor 10 according to the first embodiment, and FIG. 3B is a sectional view taken along line III-III in FIG. 3A. It is a cross-sectional view schematically showing the structure. As shown in FIGS. 3A and 3B, the rotor 30 of the motor 10 according to Embodiment 1 has an IPM (Interior Permanent Magnet) structure.

  As shown in FIG. 3B, the rotor core 32 of the motor 10 according to the first embodiment is a soft magnetic material plate mainly composed of Fe, such as an electromagnetic steel plate having a thickness of 0.2 mm to 0.5 mm. It has a structure in which a plurality of sheets are stacked, and has a structure in which the rotating shaft 31 penetrates through the center. Magnet insertion holes are provided at equal intervals in the circumferential direction on the outer peripheral side of the soft magnetic material, and a plurality of magnets (permanent magnets) 33 that are alternately different in the circumferential direction are inserted.

  As the magnet 33, any one of a rare earth magnet mainly composed of neodymium, iron and boron, a rare earth magnet mainly composed of samarium, iron and nitrogen, and a ferrite magnet is used. Further, in order to prevent the magnet 33 from jumping out in the axial direction, an end plate 35 is installed on the axial end surface of the rotor core 32 and fixed by a fixing member such as a screw 36.

<Modification>
FIG. 4 is a longitudinal sectional view showing a schematic structure of a motor 10A according to a modification of the first embodiment. 4, components that are the same as or correspond to the components shown in FIG. 1 are assigned the same reference numerals as those shown in FIG. As shown in FIG. 4, in the modification of the first embodiment, the load-side fifth surface 32 a of the rotor core 32 of the rotor 30 is opposite to the third surface 21 c of the stator core 21 of the stator 20, and the stator The 20 stator cores 21 are located on the load side of the first surface 21a. Further, the sixth surface 32 b on the opposite side of the rotor core 32 of the rotor 30 is located on the more opposite side than the fourth surface 21 d of the stator core 21 of the stator 20. Therefore, the length L2 of the portion where the first member 221 and the rotor core 32 of the rotor 30 overlap in the axial direction in the second portion 220 of the stator core 21 is set to be longer than the length L0 in the comparative example (FIG. 5) described later. Can be shortened.

《Comparative example》
FIG. 5 is a longitudinal sectional view showing a schematic structure of a motor 900 according to a comparative example. In FIG. 5, the same reference numerals as those shown in FIG. 1 are given to the same or corresponding elements as those shown in FIG. As shown in FIG. 5, in the comparative example, the fifth surface 32 a that is the load-side end surface of the rotor core 32 is located at the same position in the axial direction as the third surface 21 c of the stator core 21. In addition, the sixth surface 32 b that is the end surface on the non-load side of the rotor core 32 is located at the same position as the fourth surface 21 d of the stator core 21 in the axial direction. Therefore, the first member 221 and the second member 222 of the stator core 21 and the rotor core 32 of the comparative example overlap with each other with the length L0 in the axial direction.

<< 1-2 >> Effect In the motors 10 and 10A according to the first embodiment, the positional relationship (first condition) in which the fifth surface 32a of the rotor core 32 is located on the side opposite to the load side than the third surface 21c of the stator core 21 and The sixth surface 32b of the rotor core 32 satisfies at least one of the positional relationships (second conditions) located on the load side with respect to the fourth surface 21d of the stator core 21. Thereby, in at least one of the first member 221 and the second member 222 of the second portion 220 of the stator core 21, the length of the portion where the second portion 220 and the rotor 30 overlap in the axial direction (L1 in FIG. 1 or FIG. 4). L2) can be made shorter than the comparative example (L0 in FIG. 5). Therefore, the magnetic flux flowing from the rotor core 32 into the second part 220 of the stator core 21 can be reduced, the eddy current loss in the second part 220 can be reduced, and the efficiency reduction of the motors 10 and 10A can be suppressed.

  According to the motors 10 and 10A according to the first embodiment, the first portion 210 is configured by laminating a plurality of soft magnetic material plates 211 having a plate thickness in the range of 10 μm to 200 μm in the axial direction. Thereby, the eddy current which generate | occur | produces in the stator core 21 can be suppressed, and the efficiency of the motors 10 and 10A can be improved.

  According to the motors 10 and 10A according to the first embodiment, the first part 210 may be made of a soft magnetic material having a nanocrystal and an amorphous crystal structure. A soft magnetic material having a nanocrystalline and amorphous crystal structure has a fine crystal structure, so that eddy current loss can be reduced. In addition, since the soft magnetic material having a nanocrystalline and amorphous crystal structure has excellent soft magnetic characteristics such as high magnetic permeability and low coercive force, the amount of flux convergence from the rotor core 32 of the rotor 30 is increased and the hysteresis loss is reduced. The effect that can be produced.

  According to the motors 10 and 10A according to the first embodiment, the second portion 220 is made of a material having conductive and nonmagnetic characteristics. Thereby, the second part 220 can be made of a material having high mechanical strength and high degree of processing freedom, and the magnetic flux flowing into the second part 220 from the rotor core 32 of the rotor 30 can be reduced. Generation of eddy currents that cause a decrease and an increase in noise can be suppressed.

  According to the motors 10 and 10A according to the first embodiment, the second part 220 can be made of, for example, a material mainly composed of aluminum. A material containing aluminum as a main component is a non-magnetic material, is a low-cost material, and has a high degree of processing freedom. In addition, since the material mainly composed of aluminum has high electric resistance, eddy current loss can be suppressed even if magnetic flux flows into the second portion 220.

  According to motors 10 and 10A according to the first embodiment, motors 10 and 10A are IPM motors having an IPM structure. In IPM motors, rare earth sintered magnets are mainly used, and the amount of magnetic flux generated from the rotor is larger than SPM (Surface Permanent Magnet) motors using ferrite sintered magnets, ferrite bonded magnets, rare earth bonded magnets, etc. . Therefore, by applying the first embodiment to the IPM motor, the effect can be more remarkably exhibited as compared with the case where it is applied to the SPM motor.

<< 2 >> Embodiment 2
<< 2-1 >> Configuration FIG. 6 is a longitudinal sectional view showing a schematic structure of a motor 10B according to Embodiment 2 of the present invention. In FIG. 6, the same reference numerals as those shown in FIG. 1 are given to the same or corresponding elements as those shown in FIG. The motor 10B shown in FIG. 6 is different from the motor 10 shown in FIG. 1 in that the fifth surface 32a of the rotor core 32 of the rotor 30 is located on the side opposite to the third surface 21c of the stator core 21 of the stator 20. .

  As shown in FIG. 6, in the motor 10 </ b> B according to the second embodiment, the fifth surface 32 a that is the load-side end surface of the rotor core 32 of the rotor 30 is more than the third surface 21 c of the stator core 21 of the stator core 21 of the stator 20. Is located on the load side of the first surface 21 a of the stator core 21 of the stator 20. Further, the sixth surface 32 b that is the end surface on the side opposite to the load of the rotor core 32 of the rotor 30 is more on the load side than the fourth surface 21 d of the stator core 21 of the stator 20 and more opposite to the second surface 21 b of the stator core 21 of the stator 20. Located on the load side. Therefore, the length L5 (second thickness) between the fifth surface 32a and the sixth surface 32b of the rotor core 32 of the rotor 30 is set between the third surface 21c and the fourth surface 21d of the stator core 21 of the stator 20. It is shorter than the length L6 (third thickness) between them (L5 <L6).

  As a result, the portion of the second portion 220 of the stator core 21 in which the first member 221 and the rotor core 32 of the rotor 30 overlap in the axial direction can be made the length L3, and the second member 222 and the rotor 30 can be made. The portion where the rotor core 32 overlaps in the axial direction can be set to the length L4, which can be reduced compared to the length L0 in the comparative example of the first embodiment.

<< 2-2 >> Effect According to the motor 10B according to the second embodiment, the same effects as those of the motors 10 and 10A according to the first embodiment can be obtained.

  According to the motor 10 </ b> B according to the second embodiment, the fifth surface 32 a that is the load-side end surface of the rotor core 32 of the rotor 30 is on the opposite side of the third surface 21 c of the stator core 21 of the stator 20 and the stator 20. The stator core 21 is positioned on the load side with respect to the first surface 21a. Further, the sixth surface 32 b that is the end surface on the side opposite to the load of the rotor core 32 of the rotor 30 is more on the load side than the fourth surface 21 d of the stator core 21 of the stator 20 and more opposite to the second surface 21 b of the stator core 21 of the stator 20. Located on the load side. The length L5 between the fifth surface 32a and the sixth surface 32b of the rotor core 32 of the rotor 30 is longer than the length L6 between the third surface 21c and the fourth surface 21d of the stator core 21 of the stator 20. short. Therefore, in both the first member 221 and the second member 222, the length of the portion of the rotor 30 that overlaps the rotor core 32 in the axial direction can be reduced. Thereby, the magnetic flux flowing into the second part 220 of the stator core 21 from the rotor core 32 of the rotor 30 can be reduced in both the first member 221 and the second member 222, eddy current loss can be reduced, and the efficiency of the motor 10B can be reduced. The decrease can be suppressed.

<< 3 >> Embodiment 3
<< 3-1 >> Configuration FIG. 7A is a transverse sectional view showing a schematic structure of a motor 10C according to Embodiment 3 of the present invention, and shows a sectional structure taken along line VII-VII in FIG. 7B. It is sectional drawing shown. FIG.7 (b) is a longitudinal cross-sectional view which shows schematic structure of the motor 10C which concerns on Embodiment 3 of this invention. 7A and 7B, the same reference numerals as those shown in FIG. 1 are given to the same or corresponding elements as those shown in FIG. A motor 10C shown in FIGS. 7A and 7B is different from the motor 10 shown in FIG. 1 in the shape of the second portion 220 of the stator core 21.

  As shown in FIG. 7B, the axial length L7 (the thickness of the tooth portion) of the tooth portion 22 of the second portion 220 of the motor 10C according to the third embodiment is the core back of the second portion 220. It is shorter than the length L8 in the axial direction of the portion 23 (the thickness of the core back portion) (L7 <L8). Since the tooth portion 22 is closer to the rotor core 32 of the rotor 30 than the core back portion 23, the magnetic flux from the rotor core 32 of the rotor 30 tends to flow into the teeth portion 22 from the core back portion 23. Therefore, preventing the magnetic flux from flowing into the second portion 220 of the tooth portion 22 is effective in suppressing eddy currents generated in the second portion 220.

<< 3-2 >> Effect According to the motor 10C according to the third embodiment, the same effects as those of the motors 10 and 10A according to the first embodiment can be obtained.

  According to the motor 10C according to the third embodiment, the axial length L7 of the tooth portion 22 of the second portion 220 is shorter than the axial length L8 of the core back portion 23 of the second portion 220. Thereby, the magnetic flux which flows into the teeth part 22 of the 2nd part 220 can be reduced, the eddy current loss in the 2nd part 220 can be reduced, and the efficiency fall of the motor 10C can be suppressed.

<< 4 >> Embodiment 4
<< 4-1 >> Configuration FIG. 8 is a diagram schematically showing a configuration of an air conditioner 400 according to Embodiment 4 of the present invention. As shown in FIG. 8, the air conditioner 400 includes an outdoor unit 410, an indoor unit 420, and a refrigerant pipe 430 for circulating a refrigerant between the outdoor unit 410 and the indoor unit 420. .

  The outdoor unit 410 has a compressor 411, a heat exchanger 412, a fan 413, and a motor 414 that rotates the fan 413. The motor 414 and the fan 413 constitute a blower for flowing air to the heat exchanger 412. The indoor unit 420 includes a heat exchanger 421, a fan 422, and a motor 423 that rotates the fan 422. The motor 414 and the fan 413 constitute a blower for flowing air to the heat exchanger 421.

  In the air conditioner 400 according to the fourth embodiment, at least one of the motor 414 and the motor 423 is configured by the motors 10, 10A, 10B, and 10C according to the first to third embodiments. In the air conditioner 400 according to Embodiment 4, either a cooling operation in which cool air is blown from the indoor unit 420 or a heating operation in which warm air is blown from the indoor unit 420 can be selectively performed. The air conditioner 400 according to the fourth embodiment except that the motors 10, 10A, 10B, and 10C according to the first to third embodiments are employed as at least one of the motor 414 and the motor 423. Is the same as a conventional air conditioner.

<< 4-2 >> Effect According to the air conditioner 400 according to the fourth embodiment, in addition to the effects obtained by the motors 10, 10A, 10B, and 10C described in the first to third embodiments, the air The efficiency of the harmony machine 400 and the effect of noise reduction can be obtained.

<< 5 >> Modifications As described above, the motor and the air conditioner according to the present invention have been described according to the first to fourth embodiments. However, within the scope of the present invention, the embodiments may be combined, or the embodiments may be combined. Can be appropriately modified.

  According to motors 10, 10A, 10B, 10C and air conditioner 400 according to Embodiments 1 to 4 above, the inner rotor type motor in which the rotor is in the radial center and the stator is positioned on the radially outer side. Although the example to which the present invention is applied has been described, the present invention can also be applied to an outer rotor type motor in which the stator is at the center in the radial direction and the rotor is positioned at the outer side in the radial direction.

  According to the motors 10, 10A, 10B, 10C and the air conditioner 400 according to the first to fourth embodiments, the present invention is applied to the rotor core 32 of the rotor 30 having the IPM structure as shown in FIG. Although the example has been described, the rotor may have an SPM structure as shown in FIG. FIG. 9 is a longitudinal sectional view showing a schematic structure of a motor having an SPM structure. 9, components that are the same as or correspond to the components shown in FIG. 2 are assigned the same reference numerals as those shown in FIG. As shown in FIG. 9, a motor 500 having an SPM structure uses a cylindrical resin iron core or a ferrite bonded magnet as a yoke 502, and a rare earth bond mainly composed of neodymium, iron, and boron on the outer peripheral surface of the rotor. Any one of a magnet, a rare earth bonded magnet mainly composed of samarium, iron, and nitrogen, or a ferrite bonded magnet 503 is integrally formed with the yoke 502.

  10, 10A, 10B, 10C Motor, 20 stator, 21 stator core, 21a 1st surface, 21b 2nd surface, 21c 3rd surface, 21d 4th surface, 22 teeth portion, 23 core back portion, 24 insulator, 25 magnet wire (Winding), 30 rotor, 31 rotating shaft (shaft), 32 rotor core (yoke part), 32a fifth surface, 32b sixth surface, 33 magnet, 34 bearing, 35 end plate, 36 screw, 210 first part, 211 soft magnetic material plate, 220 second part, 221 first member, 222 second member, 32c outer peripheral surface, 400 air conditioner, 410 outdoor unit, 411 compressor, 412 heat exchanger, 413 fan, 414 motor, 420 Indoor unit, 423 motor, 430 cold Pipe, 500 motor, 502 yoke 503 magnet, 900 motor.

A motor according to an aspect of the present invention is a motor including a stator core and a rotor core, and the stator core has a first part and a second part, and the first part is made of a soft magnetic material. A first plate made of a non-magnetic material that is electrically conductive and in contact with the first surface that is an end surface on the load side of the first portion; A second plate made of a conductive non-magnetic material in contact with a second surface which is an end surface on the side opposite to the load of the portion, wherein the first plate is one of the multilayer plates The second plate is thicker than the first thickness, and the rotor core has a fifth surface which is an end surface on the load side of the rotor core, which is an end surface on the load side of the first plate. The first condition located on the anti-load side of the third surface and the sixth surface which is the end surface on the anti-load side of the rotor core are the second plate Than the fourth surface is an end of the load side are formed so as to satisfy the second condition positioned on the load side, the fifth surface is located on the load side of the first surface, the sixth surface Is located on the anti-load side of the second surface .

A motor according to another aspect of the present invention is a motor including a stator core and a rotor core, wherein the stator core has a first part and a second part, and the first part is a soft magnetic material. The second part is a first plate in contact with a first surface which is an end surface on the load side of the first part, and an end surface on the anti-load side of the first part. A second plate in contact with a second surface,
The first plate is thicker than a first thickness of one of the multilayer plates, and the second plate is thicker than the first thickness, and is a load-side end surface of the rotor core. The second thickness from the surface to the sixth surface which is the end surface on the opposite side of the rotor core is from the third surface which is the end surface on the load side of the first plate of the second portion to the second portion. The second plate is thinner than the third thickness up to the fourth surface which is the end surface on the opposite side of the second plate, the fifth surface is positioned on the load side of the first surface, and the sixth surface is more than the second surface. Is also located on the anti-load side .

Claims (15)

A stator core;
Rotor core,
A motor equipped with
The stator core has a first part and a second part,
The first part includes a multilayer plate formed of a soft magnetic material,
The second part is a first plate made of a conductive, non-magnetic material in contact with the first surface which is an end surface on the load side of the first part, and an end surface on the anti-load side of the first part. A second plate made of a conductive non-magnetic material in contact with the second surface,
The first plate is thicker than a first thickness of one of the multilayer plates, and the second plate is thicker than the first thickness,
The rotor core includes a first condition in which a fifth surface, which is an end surface on the load side of the rotor core, is located on a more anti-load side than a third surface, which is an end surface on the load side, of the first plate; A motor formed so that a sixth surface that is an end surface on the load side satisfies at least one of a second condition that is located on the load side with respect to a fourth surface that is an end surface on the anti-load side of the second plate.   The motor according to claim 1, wherein the rotor core satisfies the first condition, and the fifth surface is located on a load side with respect to the first surface.   3. The motor according to claim 1, wherein the rotor core satisfies the second condition, and the sixth surface is located on a more anti-load side than the second surface. A stator core;
Rotor core,
A motor equipped with
The stator core has a first part and a second part,
The first part includes a multilayer plate formed of a soft magnetic material,
The second part includes a first plate in contact with a first surface which is an end surface on the load side of the first part, and a second plate in contact with a second surface which is an end surface on the anti-load side of the first part. Board and
The first plate is thicker than a first thickness of one of the multilayer plates, and the second plate is thicker than the first thickness,
The second thickness from the fifth surface, which is the end surface on the load side of the rotor core, to the sixth surface, which is the end surface on the opposite side of the rotor core, is the end surface on the load side of the first plate of the second part. A motor thinner than a third thickness from a third surface to a fourth surface which is an end surface on the side opposite to the load of the second plate of the second part.   The motor according to claim 4, wherein the first plate and the second plate are made of a conductive and nonmagnetic material.   The rotor core includes: a first condition in which the fifth surface is located on the anti-load side from the third surface; and a second condition in which the sixth surface is located on the load side from the fourth surface. The motor according to claim 4, wherein the motor is formed so as to satisfy at least one of them.   The motor according to claim 6, wherein the rotor core satisfies the first condition, and the fifth surface is located on a load side with respect to the first surface.   8. The motor according to claim 6, wherein the rotor core satisfies the second condition, and the sixth surface is located on a more anti-load side than the second surface. The axial thickness of the core back portion of the first plate is thicker than the axial thickness of the teeth portion of the first plate,
The axial thickness of the core back portion of the second plate is thicker than the axial thickness of the teeth portion of the second plate.
The motor according to claim 1.   10. The motor according to claim 1, wherein the first plate has a thickness of 200 μm or more, and the second plate has a thickness of 200 μm or more.   11. The motor according to claim 1, wherein a thickness of one of the multilayer plates included in the first part is in a range of 10 μm to 200 μm.   The motor according to any one of claims 1 to 11, wherein the second part is made of a material mainly composed of aluminum.   The motor according to claim 1, wherein the second part has a plurality of stacked material layers.   The motor according to any one of claims 1 to 13, further comprising a permanent magnet embedded in the rotor core or provided on a surface of the rotor core on the stator core side.   The air conditioner provided with the air blower which has a motor of any one of Claim 1 to 14.

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