JP2015104238A - Double stator type rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double stator type rotary electric machine that is able to prevent deformation of the peripheral portion of a hole part.SOLUTION: A double stator type rotary electric machine comprises: a hole part which is arranged between outside-diameter-side permanent magnets Ma, Mb and an inside-diameter-side permanent magnet Mc and through which a first fixing member 3 is passed to be used for fixing a rotor core to a rotary shaft; holding parts 15c, 15f provided on one or both surface parts of the rotor core and holding a permanent magnet; and a bridge 15d connecting the central part 15e of the rotor core and the holding part 15c. The two outside-diameter-side permanent magnets Ma, Mb are identical in the direction of magnetization. In this structure, since stress on the bridge 15d is restricted when processing or fixing using the first fixing member 3 are carried out, deformation of the peripheral portion of the hole part can be prevented. Therefore, while magnetic force corresponding to required torque is ensured by the two separate outside-diameter-side permanent magnets Ma, Mb, damage can be prevented.

Description

  The present invention relates to a double stator type rotating electric machine having two stators arranged with a rotor interposed therebetween.

  In general, a double stator motor has a magnetic force acting gap surface that can be widened, high torque can be obtained for its physique, and the rotor is structurally a donut-shaped ring core. is important.

  Conventionally, an example of a technique related to a double stator motor that aims to prevent the outer permanent magnet from peeling off from the outer peripheral surface of the rotor and to suppress a reduction in torque as much as possible has been disclosed (for example, Patent Document 1). reference). The rotor core in this double stator type motor is fastened by a stud bolt whose magnetic material is the same as the number of outer permanent magnets and inner permanent magnets, and the material of the connecting member with the shaft is magnetic.

JP 2007-282331 A

  However, if the technique described in Patent Document 1 is applied and fastening is performed with stud bolts for each magnetic pole, the strength is excellent. On the other hand, the rotor fixing bolt holes and bolt fastening of the magnetic pole portion effective for high strength are provided. Has the following problems.

  The first point is that it is difficult to assemble and insert a permanent magnet, particularly on the outer diameter surface side. The second point is that the magnet is broken when it is fastened with a stud bolt after it is assembled. The third point is that the performance becomes limited because it is necessary to set a large clearance from the beginning.

  Regarding the above-described problem of magnet assembly, the inventors have found out that the deformation of the hole around the hole is caused when the hole of the fixing member is processed or fastened. It was.

  The present invention has been made in view of such a point, and a first object is to provide a double stator type rotating electric machine capable of preventing deformation of a peripheral portion of a hole. The second object is to provide a double stator type rotating electrical machine that can prevent the permanent magnet from being damaged even if the peripheral part side part of the hole is deformed.

  A first invention made to solve the above-described problem is that a permanent magnet is disposed opposite to a rotor (15) provided on each of an outer diameter side and an inner diameter side of a rotor core (1, 2) via the rotor. In addition, in the double stator type rotating electrical machine (MG) having two stators (13, 14) around which the phase windings (11, 13a, 14a) are wound, the permanent magnets (6, Ma) provided on the outer diameter side. , Mb) and the permanent magnets (7, Mc, Md, Me) provided on the inner diameter side, and directly or indirectly fixing the rotor core to the rotation shafts (8, 18). Holes (15a, 15b) through which the fixing member used when performing, and a holding part (15c, 15b) that is provided on one or both surface parts of the rotor core and that holds a part or all of one surface of the permanent magnet 15 , 15i, 15j) and a bridge (15d, 15h) connecting the central portion (15e) of the rotor core and the holding portion (15c, 15j), and the two permanent members provided across the bridge Magnets have the same magnetization direction.

  According to this structure, the bridge | bridging which connects the center part of a rotor core and a holding | maintenance part is provided in the vicinity of the hole provided in the center part of a rotor core. Since the bridge is restrained in stress when processing and fixing (caulking, fastening, etc.) using a fixing member, deformation of the peripheral part of the hole (particularly, the part containing the permanent magnet) is prevented. be able to. Since a permanent magnet divided into two across the bridge is provided, the permanent magnet will be damaged (defects, cracks, etc.) even if the peripheral part of the hole is deformed while securing the magnetic force corresponding to the required torque. Can be prevented.

  According to a second aspect of the present invention, the holding portion and the reluctance pole portion are connected and continuously formed so that the surface of the rotor core is not uneven.

  According to this configuration, since the outer peripheral edge portion of the rotor core and the bridge are rigid, deformation is suppressed. Therefore, the bridge is difficult to move, and deformation around the hole is further suppressed.

  3rd invention is the same site | part in the circumferential direction of the said rotor, Comprising: The said permanent magnet provided in the said outer diameter side and the said inner diameter side is magnetized so that a magnetization direction may mutually oppose, or In each phase winding (coil) that is magnetized so that the magnetization directions are opposite to each other, the magnetic flux generated from one stator does not penetrate the other stator and the permanent magnet Electricity is supplied so that magnetic flux flows through the rotor core and returns to the one stator again.

  According to this configuration, the magnetic flux flows so that the magnetic flux generated from one stator passes through the permanent magnet and the rotor core without passing through the other stator and returns to the one stator again. When the magnetomotive force of the stator is configured as a parallel magnetomotive force in this way, the reluctance torque effect is improved, and the torque and the like can be improved.

  In addition, the number of phases of the “phase winding” is not limited and may be a single phase or a plurality of phases. The “double stator type rotating electrical machine” is optional as long as it is a device having a rotating part (for example, a shaft or a shaft). For example, a generator, a motor, a motor generator, and the like are applicable. The “central portion of the rotor core” means the central portion in the radial direction of the rotor core. As long as the “fixing member” is a member that fixes the rotor, any material (including material) or shape may be used. The “surface portion” of the rotor core means an outer peripheral surface portion or an inner peripheral surface portion in the radial direction of the rotor core. The “holding portion” may have any shape as long as it can hold a part or all of at least one surface of the permanent magnet. “Winding” means winding.

It is sectional drawing which shows typically the 1st structural example of a double stator type rotary electric machine. It is sectional drawing which shows the structural example of a rotor typically. It is a top view which shows the structural example of a rotor typically. It is a side view which shows typically the structural example of a rotor. FIG. 3 is a plan view schematically showing a first configuration example of the rotor partially enlarged. It is a top view which shows typically the 1st structural example of an electromagnetic steel plate. It is a top view which shows typically the space | interval of a permanent magnet and a hole part. FIG. 6 is a plan view schematically showing a second configuration example of the rotor partially enlarged. It is a top view which shows typically the 2nd structural example of an electromagnetic steel plate. FIG. 10 is a plan view schematically showing a third configuration example of the rotor partially enlarged. It is a top view which expands partially and shows typically the 4th structural example of a rotor partially. FIG. 10 is a plan view schematically showing a fifth configuration example of the rotor partially enlarged. It is sectional drawing which shows typically the 2nd structural example of a double stator type rotary electric machine. It is sectional drawing which shows typically the 3rd structural example of a double stator type rotary electric machine. It is sectional drawing which shows the other structural example of a rotor typically. It is sectional drawing which shows the other structural example of a rotor typically.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Each figure shows elements necessary for explaining the present invention, and does not necessarily show all actual elements. In the cross-sectional view, elements necessary for explanation are hatched in order to prioritize the visibility. When referring to directions such as up, down, left and right, the description in the drawings is used as a reference. The allowable error range includes a predetermined allowable range such as a manufacturing allowable error, a design allowable error, and an error that has no practical problem. The magnet hole may be a through hole or a non-through hole (concave portion) as long as it can accommodate a magnet.

  This embodiment will be described with reference to FIGS. The rotating electrical machine MG shown in FIG. 1 is a double stator type rotating electrical machine. The rotating electrical machine MG includes an outer diameter side stator 13 (stator), an inner diameter side stator 14 (stator), a rotor 15 (rotor), a rotating shaft 18 (shaft), and the like in the housing 12.

  The housing 12 includes a cup-shaped housing member 12a and a flat-plate housing member 12b. A bearing 17 (bearing) is interposed between the housing members 12a and 12b and the rotary shaft 18, and the rotary shaft 18 is rotatably supported.

  The outer diameter side stator 13 and the inner diameter side stator 14 are arranged to face each other via the rotor 15 and are respectively fixed to the inner wall surface of the housing member 12a. The fixing method of each stator is not ask | required. A phase winding 13 a is wound around the outer diameter side stator 13, and a phase winding 14 a is wound around the inner diameter side stator 14. More specifically, phase windings 13a and 14a are wound around corresponding stator cores (stator cores), respectively.

  The rotor 15 is fixed to the rotary shaft 18 via the disk 16. The rotor 15 is fixed to the disk 16. A configuration example and a fixing method of the rotor 15 will be described later (see FIGS. 2 to 17). The disk 16 is formed in an L shape along the radial direction and the axial direction as shown in the figure, and is fixed to the rotary shaft 18. The fixing method with respect to the rotating shaft 18 does not matter.

  2 to 4 includes a first rotor core 1, a second rotor core 2, a first fixing member 3, a second fixing member 4, and the like. The first rotor core 1 and the second rotor core 2 may be integrally molded as illustrated, or may be configured to be molded separately and then fixed. Hereinafter, the structure including the first rotor core 1 and the second rotor core 2 is simply referred to as “rotor core”.

  The first rotor core 1 shown in FIG. 2 has a through hole 15a for allowing the first fixing member 3 to pass therethrough. The second rotor core 2 has a through hole 15b having a second hole diameter R2 that is formed larger than the first hole diameter R1 (R2> R1; see FIG. 4). The through-holes 15a and 15b (fixing holes) are formed coaxially, and are such that the counterbore and the through-hole are integrated. Although not shown, the first hole diameter R1 and the second hole diameter R2 may be set to be the same (R1 = R2). The through holes 15a and 15b correspond to “holes”.

  The first rotor core 1 and the second rotor core 2 constituting the rotor core may be in the form of a single body or a laminated body. In this embodiment, as an example, as shown in FIG. 3 as viewed from the arrow D1 in FIG. 1, a magnetic body is formed into a cylindrical shape, and a laminated body in which electromagnetic steel plates (steel materials) that are one of the magnetic bodies are stacked is formed. To do. By forming in a cylindrical shape, a plurality of through holes 15a and 15b through which the first fixing member 3 is passed are formed on the circumference. The number of through holes 15a and 15b may be set arbitrarily.

  A housing portion (for example, magnet holes Ha and Hb shown in FIG. 6) for housing the outer diameter side permanent magnet 6 is formed on the outer peripheral edge portion of the rotor core. A housing portion (for example, the magnet recess Hc and the holding portion 15f shown in FIG. 6) for housing the inner diameter side permanent magnet 7 is formed on the inner peripheral edge portion of the rotor core. That is, after the inner diameter side permanent magnet 7 is accommodated in the magnet recess Hc, the claw-shaped holding portion 15f is deformed (for example, caulked) and fixed (see FIG. 4).

  The number of outer diameter side permanent magnets 6 and inner diameter side permanent magnets 7 (hereinafter simply referred to as “the number of magnets”) may be basically the number of pole pairs, but the number of magnets may be increased by division or the like. In the configuration example shown in FIG. 3, since the through holes 15a and 15b through which the first fixing member 3 is passed are provided between the outer diameter side permanent magnet 6 and the inner diameter side permanent magnet 7, the number of magnets is the number of the through holes 15a and 15b. To match. You may comprise so that the number of through-holes 15a and 15b may become smaller than the number of magnets. For example, a configuration in which the through holes 15a and 15b are provided so that the first fixing member 3 shown in FIG. 3 is more than n poles (n is a natural number) of the number of pole pairs is applicable.

  The first fixing member 3 is a rod-shaped member having at least a flange portion 3a. The first fixing member 3 may be formed of any material, but may be formed of a magnetic material so that the magnetic flux can easily flow. As shown in FIG. 2, the first fixing member 3 is passed through the through hole 15a with the second fixing member 4 interposed, and is further passed through the through hole 5h of the disk 5 formed coaxially with the through hole 15a. The The disk 5 is a configuration example of the disk 16 shown in FIG. The first fixing member 3 is formed with a flange portion 3a on the tip end portion (upper end portion in FIG. 2) side of the rotor 15, and the disk 5 side is caulked after passing through the through hole 5h to form a caulking portion 3b. (See also FIG. 4). Thus, the rotor 15 is indirectly fixed to the rotating shaft 18 via the disk 5 (see FIG. 1).

  The 2nd fixing member 4 is shape | molded with the magnetic body, and has the seat surface part 4a, the level | step difference part 4b, etc. FIG. The second fixing member 4 may be formed of any material, but may be formed of a magnetic material so that the magnetic flux can easily flow. The seat surface portion 4a corresponds to a “head portion” and is a portion that presses and fixes the second rotor core 2 and the outer diameter side permanent magnet 6. The stepped portion 4b formed in a stepped shape with the seating surface portion 4a is a portion that presses and fixes the first rotor core 1. The step portion 4b has a hole constituting a part of the through hole 15a.

  FIG. 4 shows a side view of the rotor 15 as viewed from the arrow D2 in FIGS. The rotor 15 shown in FIG. 4 is formed by laminating a plurality of electromagnetic steel plates 15g as shown. The number of the electromagnetic steel plates 15g is appropriately set in consideration of the thickness of the electromagnetic steel plate 15g. An example of forming one electromagnetic steel sheet 15g will be described later (see FIGS. 6 and 9). The through hole 15a of the first rotor core 1 is formed with a first hole diameter R1, and the through hole 15b of the second rotor core 2 is formed with a second hole diameter R2 having a size equal to or larger than the first hole diameter R1 (R2 ≧ R1). The through hole 15b may have a depth (height) in which a part or all of the flange portion 3a (head) of the first fixing member 3 is accommodated. The through-hole 5h of the disk 5 is formed coaxially with the through-holes 15a and 15b, and is formed with the same first hole diameter R1 as that of the second rotor core 2 in order to pass the first fixing member 3.

  Although the rotor 15 has been schematically described above, a specific configuration example of the rotor 15 will be described with reference to FIGS. 5 to 12, one outer diameter side permanent magnet Ma and one outer diameter side permanent magnet Mb correspond to one outer diameter side permanent magnet 6. Each of the inner diameter side permanent magnets Mc, Md, and Me corresponds to the inner diameter side permanent magnet 7.

(First configuration example)
The rotor 15A of the first configuration example shown in FIG. 5 is provided with the outer diameter side permanent magnets Ma and Mb at the outer peripheral edge portion of the rotor core, and similarly with the inner diameter side permanent magnet Mc at the inner peripheral edge portion. The plurality of outer diameter side permanent magnets 6 (that is, a set of the outer diameter side permanent magnet Ma and the outer diameter side permanent magnet Mb) are provided along the outer peripheral edge of the rotor core as shown in FIG. The outer diameter side permanent magnet Ma and the outer diameter side permanent magnet Mb constituting the outer diameter side permanent magnet 6 have the same magnetization direction, and the outer diameter side permanent magnets 6 adjacent to each other in the circumferential direction have opposite magnetization directions. The plurality of inner diameter side permanent magnets Mc are provided along the inner peripheral edge of the rotor core as shown in FIG. 3, and the inner diameter side permanent magnets Mc (that is, the inner diameter side permanent magnets 7) adjacent to each other in the circumferential direction have opposite magnetization directions. To. The example of the magnetization direction of each magnet indicated by a thick arrow in FIG. 4 is an example in which the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc are magnetized so that the magnetization directions face each other. As shown in FIG. 8, the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc may be magnetized so that the magnetization directions are opposite to each other.

  The outer diameter side permanent magnet Ma and the outer diameter side permanent magnet Mb constituting one outer diameter side magnet body are arranged with the bridge 15d interposed therebetween. Specifically, as shown in FIG. 5, the outer diameter side permanent magnet Ma is accommodated in the magnet hole Ha, and the outer diameter side permanent magnet Mb is accommodated in the magnet hole Hb. The outer peripheral edge portions of the rotor core corresponding to the magnet holes Ha and Hb respectively hold the entire one surface (outer peripheral surface) of the outer diameter side permanent magnets Ma and Mb, and thus correspond to the holding portion 15c. As shown in FIG. 5, the inner diameter side permanent magnet Mc is accommodated in the magnet recess Hc, and then the claw-shaped holding portion 15f is deformed (for example, caulked) and fixed. That is, the holding portion 15f holds a part of one surface (inner peripheral surface) applied to the inner diameter side permanent magnet Mc.

  A nonpolar reluctance pole portion Re indicated by a broken line is disposed between the outer diameter side magnet bodies adjacent in the circumferential direction and between the inner diameter side permanent magnets Mc adjacent in the circumferential direction. In other words, the reluctance pole portion Re is disposed between the permanent magnets having different polarities. By doing so, it is possible to secure a flow path through which the magnetic fluxes φi and φo flow, improve the reluctance torque effect, and achieve an effect of achieving higher performance.

  As shown in FIG. 1, the outer diameter side stator 13 is disposed to face the outer peripheral surface of the rotor 15 </ b> A, and the inner diameter side stator 14 is also disposed to face the inner peripheral surface. In addition to these arrangements, the flow of the magnetic fluxes φi and φo by energization of the phase windings 13a and 14a may be controlled by a control unit (not shown) (for example, a control device or a power conversion device).

  For example, the magnetic flux φo generated from the outer diameter side stator 13 passes through the outer diameter side permanent magnets Ma and Mb and the rotor core (including the reluctance pole portion Re) without passing through the inner diameter side stator 14 and flows again to the outer diameter side stator 13. (See arrow D3), the energization to the phase winding 13a is controlled. Similarly, the magnetic flux φi generated from the inner diameter side stator 14 does not pass through the outer diameter side stator 13, passes through the outer diameter side permanent magnet Mc and the rotor core (including the reluctance pole portion Re), and flows again to the inner diameter side stator 14. (Refer to arrow D4), the energization to the phase winding 14a is controlled. Depending on the energization control of the phase windings 13a and 14a, the flow of the illustrated magnetic fluxes φi and φo may be reversed (see directions of arrows D5 and D6 shown in FIG. 10).

  An electromagnetic steel plate 15g shown in FIG. 6 is a molding example of the first rotor core 1 and the second rotor core 2 that constitute the rotor core of the rotor 15A. Magnet holes Ha and Hb are provided side by side in the circumferential direction on the outer peripheral edge of the electromagnetic steel sheet 15g, and a bridge 15d is provided between the magnet hole Ha and the magnet hole Hb. The holding part 15c and the reluctance pole part Re are connected and formed so as to prevent the surface of the rotor core (outer peripheral surface; upper side in the drawing) from being uneven. The holding portion 15c and the bridge 15d are joined to form a T shape. The radial width (thickness) of the holding portion 15c may be set arbitrarily. In order to make the magnetic flux easily flow, it is preferable to make it small (thin) and to increase the rigidity of the holding portion 15c, it is good to make it large (thick).

  A magnet concave portion Hc is provided at the inner peripheral edge of the electromagnetic steel sheet 15g, and a holding portion 15f (claw portion) is provided at the circumferential end and the inner peripheral surface end of the magnet concave portion Hc. Through holes 15a and 15b are provided between the magnet holes Ha and Hb and the magnet recess Hc (that is, the central portion 15e of the rotor core).

  The interval between the above-described through holes 15a and 15b and the magnet holes Ha and Hb or the magnet recess Hc may be set as follows. Since the through holes 15a and 15b are different only in diameter, the description of FIGS. 6 to 12 will be made on behalf of the through hole 15a.

  In the first interval setting example, a first distance L1 indicating a radial distance between the through hole 15a and the magnet holes Ha and Hb, and a second distance L2 indicating a radial distance between the through hole 15a and the magnet recess Hc are set. Either the same (L1 = L2) or almost the same within the allowable error range (L1≈L2).

  In the second interval setting example, the first thickness T1 indicating the thickness between the through hole 15a and the magnet holes Ha and Hb, and the second thickness indicating the thickness between the through hole 15a and the magnet recess Hc. The thickness T2 is set to be the same (T1 = T2) or substantially the same within the allowable error range (T1≈T2).

  When the first fixing member 3 is passed through the through hole 15a, the outer diameter side permanent magnets Ma and Mb are accommodated in the magnet holes Ha and Hb, respectively, and the inner diameter side permanent magnet Mc is accommodated in the magnet recess Hc, the interval is As shown in FIG. The first interval setting example and the second interval setting example described above may be set so as to satisfy one or both of them.

(Second configuration example)
As in the rotor 15A of the first configuration example shown in FIG. 5, the rotor 15B of the second configuration example shown in FIG. 8 is provided with outer diameter side permanent magnets Ma and Mb on the outer peripheral edge of the rotor core, An inner diameter side permanent magnet Mc is provided. The rotor 15B is different from the rotor 15A in that concave portions Ka, Kb, Kc are provided. The rotor 15B flows with the same magnetic flux as the magnetic fluxes φi and φo shown in FIG. 5 or the same magnetic flux as the magnetic fluxes φi and φo shown in FIG. 10, but is shown in FIG. Is omitted.

  The example of the magnetization direction of each magnet shown by the thick arrow in FIG. 8 is an example in which the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc are magnetized so that the magnetization directions are opposite to each other. As shown in FIG. 4, the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc may be magnetized so that the magnetization directions face each other.

  As shown in FIG. 9, the concave portion Ka constitutes a part of the magnet hole Ha and is a portion recessed toward the through hole 15a. The recessed portion Kb constitutes a part of the magnet hole Hb and is a portion recessed toward the through hole 15a. The recess Kc constitutes a part of the magnet recess Hc and is a portion recessed toward the through hole 15a. The interval between the through hole 15a and the recesses Ka, Kb, Kc may be set so as to satisfy one or both of the first interval setting example and the second interval setting example described above (see FIG. 6). In this case, the magnet holes Ha and Hb and the magnet recess Hc are read as recesses Ka, Kb, and Kc, respectively.

  Even if the central portion 15e is deformed when the first fixing member 3 is fixed by providing one or more of the concave portions Ka, Kb, and Kc shown in FIGS. The recess absorbs deformation. Therefore, there is no influence on the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc, and damage can be prevented more reliably.

(Third configuration example)
The rotor 15C of the third configuration example shown in FIG. 10 is the same as the rotor 15A of the first configuration example shown in FIG. This is different in that the inner diameter side permanent magnets Md and Me are provided in the part. Further, the bridge 15h is provided between the inner diameter side permanent magnet Md and the inner diameter side permanent magnet Me in the same manner as the bridge 15d is provided between the outer diameter side permanent magnet Ma and the outer diameter side permanent magnet Mb. To do. Therefore, a bridge 15h is formed on the electromagnetic steel plate 15g shown in FIG. 6 on the radially inner diameter side (lower side in FIG. 6) of the bridge 15d. A holding portion 15f is also formed on the inner diameter side tip of the bridge 15h.

  The example of the magnetization direction of each magnet indicated by a thick arrow in FIG. 10 is an example in which the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc are magnetized so that the magnetization directions face each other, as in FIG. is there. As shown in FIG. 8, the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc may be magnetized so that the magnetization directions are opposite to each other.

  In FIG. 10, the flow of magnetic fluxes φi and φo controlled by a control unit (not shown) is indicated by arrows D5 and D6, respectively. Magnetic flux φo generated from the outer diameter side stator 13 passes through the outer diameter side permanent magnets Ma and Mb and the rotor core (including the reluctance pole portion Re) without passing through the inner diameter side stator 14 and flows again to the outer diameter side stator 13 (arrow) See D5). Similarly, the magnetic flux φi generated from the inner diameter side stator 14 passes through the outer diameter side permanent magnet Mc and the rotor core (including the reluctance pole portion Re) without penetrating the outer diameter side stator 13 and flows again to the inner diameter side stator 14 (arrow) See D6). Note that the flow of the magnetic fluxes φi and φo shown in the figure may be in opposite directions (see directions of arrows D3 and D4 shown in FIG. 5).

(Fourth configuration example)
As in the rotor 15A of the first configuration example shown in FIG. 5, the rotor 15D of the fourth configuration example shown in FIG. 11 is provided with outer diameter side permanent magnets Ma and Mb on the outer peripheral edge portion of the rotor core, An inner diameter side permanent magnet Mc is provided. The rotor 15D is different from the rotor 15A in that a holding portion 15i similar to the holding portion 15c shown in FIGS. 5, 8, and 10 is provided in place of the claw-like holding portion 15f. Therefore, a holding portion 15i is formed on the inner diameter side end portion (lower side in FIG. 6) of the electromagnetic steel sheet 15g shown in FIG. The inner diameter side permanent magnet Mc is accommodated in the magnet hole Hd. The magnet hole Hd includes a magnet recess Hc shown in FIG. 6 and a holding portion 15i shown in FIG.

  The magnetization direction example of each magnet indicated by a thick arrow in FIG. 11 is an example in which the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc are magnetized so that the magnetization directions face each other, as in FIG. is there. As shown in FIG. 8, the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc may be magnetized so that the magnetization directions are opposite to each other.

  A magnetic flux similar to the magnetic fluxes φi and φo shown in FIG. 5 flows through the rotor 15D or a magnetic flux similar to the magnetic fluxes φi and φo shown in FIG. In FIG. 11, the illustration is omitted.

(Fifth configuration example)
The rotor 15E of the fifth configuration example shown in FIG. 12 is provided with outer diameter side permanent magnets Ma and Mb on the outer peripheral edge portion of the rotor core, similarly to the rotor 15A of the first configuration example shown in FIG. Similarly to the rotor 15C of the configuration example, inner diameter side permanent magnets Md and Me are provided on the inner peripheral edge. The bridge 15h is sandwiched between the inner diameter side permanent magnet Md and the inner diameter side permanent magnet Me in the same manner as the bridge 15d is sandwiched between the outer diameter side permanent magnet Ma and the outer diameter side permanent magnet Mb. Provide. The inner diameter side permanent magnet Md is accommodated in the magnet hole He, and the inner diameter side permanent magnet Me is accommodated in the magnet hole Hf.

  The outer peripheral edge portion of the rotor core corresponding to each of the inner diameter side permanent magnets Md and Me holds all of one surface (outer peripheral surface) of the inner diameter side permanent magnets Md and Me, and thus corresponds to the holding portion 15jc. The holding portion 15j and the bridge 15h are joined to form a T shape. The radial width of the holding portion 15j may be arbitrarily set similarly to the holding portion 15c. Therefore, the electromagnetic steel sheet 15g shown in FIG. 6 has a bridge 15h shown in FIG. 10 on the radially inner diameter side (lower side in FIG. 6) of the bridge 15d and an inner diameter side end (lower side in FIG. 6) in FIG. A holding portion 15j shown is formed.

  The example of the magnetization direction of each magnet indicated by a thick arrow in FIG. 12 is an example in which the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc are magnetized so that the magnetization directions face each other, as in FIG. is there. As shown in FIG. 8, the outer diameter side permanent magnets Ma and Mb and the inner diameter side permanent magnet Mc may be magnetized so that the magnetization directions are opposite to each other.

  A magnetic flux similar to the magnetic fluxes φi and φo shown in FIG. 5 flows through the rotor 15E or a magnetic flux similar to the magnetic fluxes φi and φo shown in FIG. In FIG. 12, the illustration is omitted.

(Other configuration examples)
The first to fifth configuration examples described above may be applied in any combination of two or more. Any combination of two or more of the first to fifth configuration examples may be applied to a plurality of poles provided in one rotor 15 (15A, 15B, 15C, 15D, 15E). For example, a configuration in which the first configuration example is applied to a certain pole and the second configuration example is applied to another pole is applicable. Which configuration example is applied to which pole may be freely set.

[Other Embodiments]
Although the form for implementing this invention was demonstrated above, this invention is not limited to the said form at all. In other words, various forms can be implemented without departing from the scope of the present invention. For example, the following forms may be realized.

  In the embodiment described above, the phase winding 13a is wound around the outer diameter side stator 13, and the phase winding 14a is wound around the inner diameter side stator 14 (see FIG. 1). Instead of this configuration, as shown in FIG. 13, the outer diameter side stator 13 and the inner diameter side stator 14 may be wound with one phase winding (U-shaped phase winding 11). Since only the configuration of the phase winding is different, the same effect as the above-described embodiment can be obtained.

  In the above-described embodiment, the disk 16 and the rotating shaft 18 are formed separately, and the disk 16 is fixed to the rotating shaft 18 (see FIG. 1). Instead of this form, as shown in FIG. 14, a rotating shaft 18 having a disk portion 18a may be applied. The disk portion 18 a corresponds to the disk 16. In other words, the rotating shaft 18 shown in FIG. 14 is obtained by integrally forming the disk 16 and the rotating shaft 18 shown in FIG. 1 and directly fixes the rotor 15. Since there is only a difference between molding and fixing separately, or integral molding, the same effects as those of the above-described embodiment can be obtained.

  In the above-described embodiment, when the rotor 15 is fixed to the disk 5 (16, 18a), the first fixing member 3 is passed through the through holes 15a, 15b, 5h and then caulked portion 3b is formed. (See FIG. 2). Instead of this configuration, the first fixing member 3 may be passed through the through holes 15a, 15b, and 5h, and then the joint portion 3c may be formed as shown in FIG. 15, and the fastening portion as shown in FIG. It is good also as a structure which shape | molds 3d and 3e. Since only the fixing method is different, it is possible to obtain the same effects as the above-described embodiment.

  15 is a portion where the disk 5 and the first fixing member 3 are joined. Joining includes, for example, laser welding using the energy of a laser beam, arc welding for generating and welding an arc, and soldering for melting and joining solder.

  The fastening portions 3d and 3e shown in FIG. 16 are formed by forming the first fixing member 3 with a screwed bolt and screwing it into the screw hole 3d provided in the disk 5, or fastening with the nut 3e, screw hole 3d. And the like that is screwed into the nut 3e and fastened to the nut 3e. Furthermore, you may join like fastening part 3c shown in FIG. 15 with respect to fastening members, such as the 1st fixing member 3 and the nut 3e.

  Although not shown, when the rotor 15 is fixed to the disk 5 (16, 18a), any combination of two or more fixing methods among the caulking portion 3b, the joining portion 3c, and the fastening portions 3d, 3e may be fixed. Good. The fixing method may be applied to the disk 5 side, may be applied to the flange portion 3a side, or may be applied to both the disk 5 side and the flange portion 3a side. By applying two or more fixing methods, the axial length can be made shorter than before, and the rotor 15 can be more firmly fixed to the disk 5 (16, 18a). The same applies to the rotating shaft 18.

  In the embodiment described above, the inner diameter side permanent magnet 7 (inner diameter side permanent magnet Mc, Md, Me) is accommodated in the recess (magnet recess Hc) formed in the rotor core (the first rotor core 1 and the second rotor core 2). The claw-shaped holding portion 15f is deformed and fixed (see FIG. 1). Instead of this configuration, a plate-like member may be interposed between the inner diameter side permanent magnet 7 and the holding portion 15f so as to be accommodated in the concave portion of the rotor core. In this case, the holding portion 15f may be deformed or may not be deformed.

  In the embodiment described above, the housing 12 is constituted by the cup-shaped housing member 12a and the flat-plate-shaped housing member 12b (see FIG. 1). Instead of this form, the housing member 12a may be formed in a shape other than a cup shape, and the housing member 12b may be formed in a shape other than a flat plate shape. That is, the housing member 12a and the housing member 12b may be configured in any shape as long as the outer diameter side stator 13, the inner diameter side stator 14, the rotor 15, the rotating shaft 18 and the like can be accommodated. Since only the structure of the housing 12 is different, it is possible to obtain the same effect as the above-described embodiment.

  In the embodiment described above, the first fixing member 3 and the second fixing member 4 are formed separately (see FIGS. 2, 15, and 16). Instead of this form, although not shown, the first fixing member 3 and the second fixing member 4 may be integrally formed. The end surfaces of the first fixing member 3 and the second fixing member 4 are desirably aligned within an allowable error range, and are best set to be the same surface. The seat surface portion 4 a of the second fixing member 4 may be configured such that the seat surface portion 4 a contacts the end surface of the second rotor core 2 with an angle θ with respect to the end surface of the second rotor core 2. Since there is only a difference in the fixing method, it is possible to obtain the same effects as those of the above-described embodiment.

[Effect of the embodiment]
According to the embodiment described above, the following effects can be obtained.

  (1) In the double stator type rotary electric machine MG, the rotor core is disposed between outer diameter side permanent magnets Ma, Mb provided on the outer diameter side and inner diameter side permanent magnets Mc, Md, Me provided on the inner diameter side. Permanent magnets are provided in one or both surface portions of the through holes 15a and 15b (hole portions) through which the first fixing member 3 used when directly or indirectly fixing the rotary shaft 18 is passed, and the rotor core. Holding portions 15c, 15f, 15i, and 15j for holding a part or all of the one surface, and bridges 15d and 15h for connecting the central portion 15e of the rotor core and the holding portions 15c and 15j, and the bridges 15d and 15h. The two permanent magnets provided with the magnet sandwiched between them have the same magnetization direction (see FIGS. 5, 8, 11, and 12). According to this configuration, since the bridges 15d and 15h are suppressed during processing and when fixing (caulking, fastening, etc.) using the first fixing member 3 (fixing member) is performed, the through-holes are suppressed. It is possible to prevent deformation of the peripheral portions of 15a and 15b (particularly, the magnet holes Ha, Hb, Hd, He, and Hf for accommodating the permanent magnets). Since permanent magnets (outer diameter side permanent magnets Ma, Mb and inner diameter side permanent magnets Md, Me) divided into two across the bridges 15d, 15h are provided, the magnetic force corresponding to the necessary torque is ensured, but temporarily Even if the peripheral portions of the through holes 15a and 15b are deformed, the permanent magnet (the outer diameter side permanent magnet 6 or the inner diameter side permanent magnet 7) can be prevented from being damaged.

  (2) A nonpolar reluctance pole portion Re is arranged between permanent magnets of different polarities (outer diameter side permanent magnets Ma, Mb and inner diameter side permanent magnets Mc, Md, Me) (FIG. 5). FIG. 8, FIG. 11, and FIG. 12). According to this configuration, a flow path through which the magnetic fluxes φi and φo flow can be secured, the reluctance torque effect can be improved, and higher performance can be achieved.

  (3) The holding portions 15c and 15j and the reluctance pole portion Re are connected and formed so as to be continuous so as not to cause unevenness on the surface of the rotor core (see FIGS. 4 to 12). According to this configuration, the holding portions 15c and 15j, which are the outer peripheral edge portions of the rotor core, and the bridges 15d and 15h are rigid, so that deformation is suppressed. Therefore, the bridges 15d and 15h are difficult to move, and deformation of the peripheral portions of the through holes 15a and 15b (hole portions) is further suppressed.

  (4) Outer diameter side permanent magnet 6 (Ma, Mb) provided on the outer diameter side and inner diameter side permanent magnet 7 (Mc, Md, Me) provided on the inner diameter side, which are the same part in the circumferential direction of the rotor 15 Is magnetized so that the magnetization directions oppose each other, or magnetized so that the magnetization directions are opposite to each other (see FIGS. 5, 8, 11, and 12). Further, in each phase winding 13a, 14a wound around two stators, magnetic fluxes φi, φo generated from one stator pass through the permanent magnet and the rotor core without passing through the other stator, and again to one stator. It was set as the structure which supplies with electricity so that magnetic flux (phi) i and (phi) o may flow so that it may return (refer FIG. 5, FIG. 10). According to this configuration, the magnetic fluxes φi and φo flow so that the magnetic fluxes φi and φo generated from one stator pass through the permanent magnet and the rotor core without passing through the other stator and return to the one stator again. When the magnetomotive force of the stator is configured as a parallel magnetomotive force in this way, the reluctance torque effect is improved, and the torque and the like can be improved.

  (5) A first interval (first distance L1, first thickness T1) between the outer diameter side permanent magnet 6 (Ma, Mb) provided on the outer diameter side and the through holes 15a, 15b (hole portions); The second distance (second distance L2, second thickness T2) between the inner diameter side permanent magnet 7 (Mc, Md, Me) provided on the inner diameter side and the through holes 15a, 15b (hole portions) is: It was set as the structure which is the same space | interval including the tolerance | permissible_error range (refer FIG. 6, FIG. 7). According to this configuration, when the rotor 15 is directly or indirectly fixed to the rotating shaft 18 with pressure, stress (including deformation) is generated in the peripheral portions of the through holes 15a and 15b. Since it is isotropic, the influence on the outer diameter side permanent magnet 6 and the inner diameter side permanent magnet 7 can be minimized.

  (6) The central portion 15e of the rotor core corresponding to the portion where the permanent magnet is disposed has the concave portions Ka, Kb, Kc that are recessed toward the through holes 15a, 15b (hole portions) (FIG. 8, (See FIG. 9). According to this configuration, when the rotor 15 is directly or indirectly fixed to the rotating shaft 18 with pressure, stress generated in the peripheral portions of the through holes 15a and 15b is absorbed by the recesses Ka, Kb, and Kc. Therefore, it can prevent more reliably that the outer diameter side permanent magnet 6 and the inner diameter side permanent magnet 7 are damaged.

  (7) The through holes 15a and 15b (holes) are provided in the rotor core every n poles or more (see FIG. 3). According to this configuration, it is possible to reduce the time and labor required for the process for fixing the rotor 15 to the rotating shaft 18 directly or indirectly.

3 First fixing member (fixing member)
4 Second fixing member (fixing member)
11, 13a, 14a Phase winding 13 Outer diameter side stator (stator)
14 Inner diameter side stator (stator)
15 (15A, 15B, 15C, 15D, 15E) Rotor 15a, 15b Through hole (hole)
15c, 15f, 15i, 15j Holding portion 15d, 15h Bridge 18 Rotating shaft (shaft)
MG Double-stator type rotating electrical machine Ma, Mb Outer diameter side permanent magnet (permanent magnet)
Mc, Md, Me Inner diameter side permanent magnet (permanent magnet)

Claims (7)

Permanent magnets are disposed on the outer diameter side and inner diameter side of the rotor core (1, 2), respectively, and the rotor (15) is disposed opposite to the rotor core (1, 13a, 14a). In a double stator type rotating electrical machine (MG) having two stators (13, 14),
The rotor core is disposed between the permanent magnet (6, Ma, Mb) provided on the outer diameter side and the permanent magnet (7, Mc, Md, Me) provided on the inner diameter side, and the rotor core is disposed on a rotating shaft ( 8, 18) holes (15a, 15b) through which fixing members used when directly or indirectly fixing are provided;
A holding portion (15c, 15f, 15i, 15j) that is provided on one or both surface portions of the rotor core and holds part or all of one surface of the permanent magnet;
A bridge (15d, 15h) connecting the central portion (15e) of the rotor core and the holding portion (15c, 15j);
The two permanent magnets provided with the bridge interposed therebetween have the same magnetization direction.   The double stator rotating electric machine according to claim 1, wherein nonpolar reluctance poles (Re) are arranged between the permanent magnets of different polarities.   3. The double stator rotating electric machine according to claim 2, wherein the holding portion (15 c) and the reluctance pole portion are connected to be continuous so as to prevent unevenness on the surface of the rotor core. The permanent magnets provided on the outer diameter side and the inner diameter side of the same portion in the circumferential direction of the rotor are magnetized so that the magnetization directions face each other, or the magnetization directions are opposite to each other. Magnetized and
In each phase winding wound around the two stators, the magnetic flux (φi, φo) generated from one stator passes through the permanent magnet and the rotor core without passing through the other stator, and again returns to the one stator. The double stator rotating electric machine according to any one of claims 1 to 3, wherein the electric current is applied so that the magnetic flux flows so as to return to step (a).   A first interval (L1, T1) between the permanent magnet provided on the outer diameter side and the hole, and a second interval (L2) between the permanent magnet provided on the inner diameter side and the hole. , T2) are the same intervals including within an allowable error range. 5. The double stator type rotating electric machine according to any one of claims 1 to 4.   The center part of the said rotor core corresponding to the site | part in which the said permanent magnet is arrange | positioned has a recessed part (Ka, Kb, Kc) dented toward the said hole part, The any one of Claim 1 to 5 characterized by the above-mentioned. The double stator type rotating electric machine according to one item.   The double stator rotating electric machine according to any one of claims 1 to 6, wherein the hole is provided in the rotor core every n poles (n is a natural number) or more.

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