JP2008252979A - Axial-gap type rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology which can effectively suppress an inclination of a rotor, in an axial-gap type rotating machine with such a constitution that two winding stators are arranged at both side of one rotor. <P>SOLUTION: The winding stators 30, 40 are arranged at both the sides of the rotor 20. A plurality of same-phase series-connection winding pairs are constituted in such a manner that a winding of a prescribed phase (for example, a winding 36U1) of the first winding stator 30 and a same-phase winding of the same phase (for example, a winding 46U7) at the second winding stator 40 side which oppose each other with the rotating machine 28 between are series-connected. These same-phase series-connection winding pairs are connected in parallel at each phase, and star-connected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an axial gap type rotating machine.

  The axial gap type motor has a configuration in which a winding stator and a rotor are provided with a gap along a rotation axis.

  In such an axial gap type motor, a suction force acts between the winding stator and the rotor along the rotation axis direction, so that the bearing loss is increased and the bearing life is shortened. . Therefore, in order to cancel the force acting in the axial direction and further reduce the number of rotating parts, a configuration in which two winding stators are provided on both sides of one rotor is preferred.

  In addition, there exists patent document 1 as a prior art relevant to this invention. Patent Document 1 discloses a technique for suppressing eccentricity of a rotor in a radial gap motor by connecting windings in a pole positional relationship facing each phase in parallel.

JP 2000-217290 A

  However, in an axial gap type motor in which two winding stators are provided on both sides of a single rotor, the rotor is usually thin with respect to a large diameter, so the rotor is held on the shaft. The portion is shortened and the rotor tends to tilt easily. Further, since the diameter of the rotor is relatively large, a slight inclination appears as a large gap difference at the outer periphery of the rotor. And if a rotor rotates in the state inclined from the plane orthogonal to an axis | shaft, a vibration and a noise may be produced, and there exists a possibility that a rotor may contact a winding stator. Also, once the rotor is tilted and approaches the winding stator, the magnetic resistance decreases at that portion, more magnetic flux passes, and the rotor and winding stator approach more. There is a fear. These are particularly problematic during high speed operation.

  Patent Document 1 merely discloses a technique for suppressing eccentricity of a rotor in a radial gap type motor in which a winding stator is provided on the outer periphery of the rotor. It does not disclose or suggest a technique capable of effectively suppressing the inclination of the rotor in the axial gap type motor provided with the winding stator.

  Accordingly, an object of the present invention is to provide a technique capable of effectively suppressing the inclination of a rotor in an axial gap type rotating machine in which two winding stators are provided on both sides of one rotor. .

  In order to solve the above-mentioned problem, the axial gap type rotating machine according to the first aspect includes a rotor (20; 120; 420; 520; 620; 720) disposed so as to be rotatable about a rotating shaft (28). 820; 920) and first winding stators (30; 230; 430; 530) disposed on both sides of the rotor in the direction of the rotation axis so as to face the rotor with a gap therebetween. 730; 830; 930) and a second winding stator (40; 240; 440; 540; 740; 840; 940), comprising: the first winding stator and the second winding stator; Each is provided with a plurality of in-phase windings (36, 46; 236, 346; 436, 446; 536, 546; 736, 746; 836, 846; 936, 946). The windings (36; 236; 436; 536; 736; 836; 936) provided on the first winding stator and the windings at positions facing the windings with the rotating shaft interposed therebetween. The windings (46; 346; 446; 546; 746; 846; 946) provided in the second winding stator are connected in series to form a plurality of in-phase series connection winding sets, These in-phase series winding connection sets are connected in parallel.

  The second aspect is the first winding stator (30; 230; 430; 530; 730; 830; 930) and the second winding stator (40; 240; 440; 540; 740; 840; 940). ) With substantially the same disposition and substantially the same number of turns (36, 46; 236, 346; 436, 446; 536, 546; 736, 746; 836, 846; 936, 946). The first winding stator and the second winding stator are magnetically substantially the same stator core (30, 40; 230, 240; 430, 440; 530, 540; 730, 740; 830, 840; 930, 940).

  According to a third aspect, each of the in-phase series connection winding sets includes windings (36; 236; 436; 536; 936) provided in the first winding stator (30; 230; 430; 530; 930). ), And a winding 46 provided at the second winding stator (40; 240; 440; 540; 940) at a position opposed to the winding with the rotating shaft interposed therebetween. Only 346; 446; 546; 946) are connected in series.

  According to a fourth aspect, each in-phase series connection winding set includes a winding (736; 836) provided in the first winding stator (730; 830), and the rotating shaft with respect to the winding. In addition to the windings (746; 846) provided in the second winding stator (740; 840), the windings located in opposition to each other across the windings (736, 746; 836, 846) are also connected in series.

  In a fifth aspect, the first winding stator (30; 230; 730; 830; 930) and the second winding stator (40; 240; 740; 840; 940) are respectively wound in phase. Lines (36, 46; 236, 346; 736, 746; 836, 846; 936, 946) are provided, and the even number of windings are arranged at substantially intervals around the rotation axis, The windings on the first winding stator side (36; 236; 736; 836; 936) and the windings on the second winding stator side (46; 346; 746; 846; 946) The plane between them is arranged in a plane-symmetric position with the plane of symmetry as the plane of symmetry.

  In a sixth aspect, the first winding stator (430; 530) and the second winding stator (440; 540) are respectively provided with three-phase windings (436, 446; 536, 546). Is provided for each phase, and the odd-numbered windings are arranged at substantially intervals around the rotation axis, and each winding (436; 536) on the first winding stator side and the first winding The windings (446; 546) on the two-winding stator side are in a positional relationship shifted from the plane-symmetrical position with the plane between them as a plane of symmetry by 180 ° about the rotation axis. .

  In a seventh aspect, the rotor (520; 720; 820) includes a permanent magnet (522a; 722a; 822a) that presents magnetic poles on a surface on the first winding stator (530; 730; 830) side; A permanent magnet (522b; 722b; 822b) having a magnetic pole on the surface on the second winding stator (540; 740; 840) side is provided so as to form an independent magnetic circuit, For each winding, the winding (536; 736; 836) provided in the first winding stator and the winding (546; 746; 846) provided in the second winding stator are The magnetic poles on the surface of the rotor on the side of the first winding stator and the magnetic poles on the surface of the side of the second winding stator are set so that they can be disposed at positions facing each other across the rotating shaft. Is.

  In the eighth aspect, each in-phase series connection winding set is star-connected to one common neutral point (60; 260; 462; 760; 960).

  In the ninth aspect, each of the in-phase series connection winding sets is star-connected to independent neutral points (62a, 62b, 62c, 62d).

  In a tenth aspect, the rotor (20; 420; 920) has a permanent magnet (22; 922) magnetized along the direction of the rotation axis.

  In an eleventh aspect, a field element magnetic body (24) made of a soft magnetic body is provided at both ends of the permanent magnet along the rotation axis direction.

  In a twelfth aspect, the rotor (620) is disposed around the rotation axis, is magnetized along a circumferential direction of a circle around the rotation axis, and is adjacent along the circumferential direction. What is provided includes a plurality of permanent magnets (624) magnetized in opposite directions and a core (622) made of a soft magnetic material and disposed between the permanent magnets.

  In a thirteenth aspect, the rotor (120) is a reluctance rotor having saliency at a portion facing the first winding stator and the second winding stator.

  In a fourteenth aspect, the first winding stator and the second winding stator have cores (34, 44; 934, 944) around which the windings are wound.

  In the fifteenth aspect, the windings (36, 46; 236, 346; 436, 446; 536, 546; 736, 746; 836, 846) are concentratedly wound.

  In the sixteenth aspect, the windings (936, 946) are distributedly wound.

  According to the axial gap type rotating machine according to the first aspect, with respect to the windings of the same phase, the windings provided on the first winding stator are opposed to the windings with the rotating shaft interposed therebetween. A winding located at a position and provided on the second winding stator is connected in series. For this reason, when the rotor is tilted, the corresponding gap between the winding provided on the first winding stator and the winding on the second winding stator side connected in series with the winding simultaneously decreases. Or the corresponding gap is increased. And in each winding corresponding to the gap which became small, magnetic resistance becomes small in that part, inductance increases, and thereby current falls and attractive power becomes small. Therefore, the suction force at the portion where the gap is narrowed by the inclination of the rotor can be reduced on the both-winding stator side. On the other hand, in each winding corresponding to the increased gap, the magnetic resistance is increased at that portion, and the inductance is decreased, whereby the current is increased and the attractive force is increased. Therefore, the suction force at the portion where the gap is narrowed by the inclination of the rotor can be reduced on the both-winding stator side. Thereby, in the axial gap type rotating machine in which two winding stators are provided on both sides of one rotor, the inclination of the rotor can be effectively suppressed.

  In addition, according to the second aspect, by making the magnetic field generated by the windings and the magnetic circuit in each of the first winding stator and the second winding stator equivalent, the rotor inclination can be made more effective. Can be suppressed.

  According to the third aspect, the tilting force of the rotor can be suppressed by controlling the suction force at multiple locations around the rotation axis.

  According to the fourth aspect, it is possible to reduce the number of wires between the first winding stator and the second winding stator by reducing the number of places where the in-phase series connection winding groups are connected in parallel. A winding provided on the first winding stator, and a winding located at a position facing the winding with the rotation axis interposed therebetween, the winding provided on the second winding stator; Since the lines and the windings in the vicinity thereof are connected in series, the inclination of the rotor is effectively corrected.

  According to the fifth aspect, when an even number of in-phase windings are provided on each of the first winding stator and the second winding stator, the in-phase ones are opposed to each other with the rotating shaft interposed therebetween. It can arrange | position in the position to do.

  According to the sixth aspect, when an odd number of in-phase windings are provided on each of the first winding stator and the second winding stator, the in-phase ones face each other across the rotating shaft. It can arrange | position in the position to do.

  According to the seventh aspect, since the independent magnetic circuit is formed on each of the first winding stator side and the second winding stator side of the rotor, the first winding is in the first phase and the first winding stator side. The winding of the rotor is arranged such that the winding provided in the winding stator and the winding provided in the second winding stator can be disposed at positions facing each other across the rotation shaft. The magnetic pole on the surface on the first winding stator side and the magnetic pole on the surface on the second winding stator side can be set.

  According to the eighth aspect, the circulating current can be reduced.

  Moreover, according to the 9th aspect, a connection becomes easy.

  According to the 10th aspect, a magnetic pole can be exhibited with respect to both stators with one layer of magnets along the rotation axis direction.

  According to the eleventh aspect, the field element magnetic body constituted by the soft magnetic body can alleviate the influence of the demagnetizing field acting on the permanent magnet, and thus prevent the permanent magnet from demagnetizing.

  According to the twelfth aspect, an independent magnetic circuit can be configured for each of the first winding stator and the second winding stator with relatively few permanent magnets.

  According to the thirteenth aspect, the torque acting on the rotor can be increased by the reluctance torque.

  According to the fourteenth aspect, since the first winding stator and the second winding stator have a core around which the winding is wound, magnetic flux leakage can be reduced.

  According to the fifteenth aspect, since the windings are concentratedly wound, the inclination can be precisely controlled and suppressed along the circumferential direction of the rotating shaft.

  According to the sixteenth aspect, since each winding is distributedly wound, the state of the inductance with respect to one winding affects the gap interval between the plurality of teeth, so that the inclination correction effect is remarkable.

{First embodiment}
Hereinafter, the axial gap type rotating machine according to the first embodiment will be described. 1 is an exploded perspective view showing an axial gap type rotating machine according to the present embodiment, FIG. 2 is an exploded perspective view showing a state in which the axial gap type rotating machine is further disassembled, and FIG. 3 is the axial gap type rotating machine. It is a connection diagram of each coil | winding in a rotary machine.

  The axial gap type rotating machine 10 includes one rotor 20 and includes a first winding stator 30 and a second winding stator 40 as two stators. The rotor 20 is formed in a substantially disk shape, and the two stators 30.40 are also formed in a substantially disk shape. The two stators 30 and 40 are arranged on both sides of the rotor 20 and generate a magnetic field to rotate the rotor 20.

  Each part will be described in more detail.

  The rotor 20 is rotatably disposed around a predetermined rotation shaft 28 via a rotation shaft portion (both not shown) rotatably supported by bearings. Further, the rotor 20 exhibits alternating magnetic poles around the rotation shaft 28 on both surfaces in the direction of the rotation shaft 28.

  Specifically, the rotor 20 has a plurality of permanent magnets 22 spaced around the rotation axis 28. Each permanent magnet 22 is formed in a shape obtained by dividing a donut plate-shaped member around the rotation shaft 28 into a plurality (here, eight), that is, an arc-shaped and strip-shaped plate shape extending around the rotation shaft 28. Each permanent magnet 22 is magnetized in the direction along the rotation axis 28, that is, in the thickness direction of the permanent magnet 22, and exhibits N or S poles on both sides. These permanent magnets 22 are arranged so as to exhibit annular and alternating magnetic poles around the rotating shaft 28. Thus, the magnetic poles can be provided to both the stators 30 and 40 by one layer of permanent magnets 22 along the direction of the rotation axis 28, that is, by a relatively small number of permanent magnets 22. Here, the rotor 20 is configured as eight poles. The rotor 20 is rotated by passing a three-phase alternating current through windings 36 and 46 described later. In addition, you may comprise the rotor 20 by magnetizing a ring-shaped member alternately in the circumferential direction and the rotating shaft 28 direction.

  A field element magnetic body 24 made of a soft magnetic body is provided on both surfaces of each permanent magnet 22, that is, on both ends of each permanent magnet 22 along the direction of the rotation axis 28. The field element magnetic body 24 is also called a so-called rotor core, and is formed in a plate shape larger than the permanent magnet 22 (here, one size larger), and is superposed on both surfaces of the permanent magnet 22. Arranged together. In addition, the magnitude | size with respect to the permanent magnet 22 of a rotor core is not limited above.

  When the demagnetizing field acts on the rotor 20 by the external magnetic field of the excited stators 30 and 40 by the field element magnetic body 24, the influence of the demagnetizing field acting on each permanent magnet 22 is alleviated. Each permanent magnet 22 is prevented from demagnetizing.

  The permanent magnets 22 and the rotor magnetic cores 24 are held in an integrated state in the above-described arrangement by a holder (not shown) formed of a non-magnetic material, and are fixed to the rotating shaft portion. ing. In the above arrangement, each permanent magnet 22 and each rotor magnetic core 24 are magnetically separated from each other by a gap or a nonmagnetic material.

  The first winding stator 30 and the second winding stator 40 are opposed to the rotor 20 with a gap (here, a slight gap) on both sides of the rotor 20 in the direction of the rotation axis 28. It is arranged. Each first winding stator 30 and second winding stator 40 are fixed to a casing (not shown) or the like.

  The first winding stator 30 includes a first stator core 32 having a first back yoke core 33 and a plurality of teeth (winding cores) 34, and a plurality of windings 36U1, 36U2, 36U3, 36U4, 36V1, and the like. 36V2, 36V3, 36V4, 36W1, 36W2, 36W3, 36W4 (hereinafter simply referred to as the winding 36 when the windings provided in the first winding stator 30 are generically referred to). Here, the first winding stator 30 is provided with twelve windings 36 in each of the four phases, and is disposed at a mechanical angle interval of 30 °. That is, the first winding stator 30 is configured as a 12-slot concentrated winding configuration.

  The first back yoke core 33 is made of a magnetic material, and is formed in a substantially disk shape having a hole 32h formed in a substantially central portion.

  The teeth 34 are annularly arranged on the surface of the first back yoke core 33 on the rotor 20 side at intervals along the circumferential direction around the rotation shaft 28. The teeth 34 adjacent to each other in the circumferential direction are substantially equidistant. Each tooth 34 is formed in a thick plate shape having a shape obtained by rounding the length of each isosceles triangle in a direction substantially orthogonal to the rotation shaft 28, and becomes gradually wider outward from the rotation shaft 28. It is arranged in a posture. The teeth 34 have a role of reducing magnetic flux leakage between adjacent teeth 34 while allowing more coils to be wound while maintaining a large cross-sectional area.

  Each winding 36 is wound around each tooth 34. Each winding 36 is formed in a substantially triangular annular shape wound in a shape corresponding to the outer peripheral shape of the tooth 34. The first winding stator 30 includes a plurality of in-phase windings 36, that is, four U-phase windings 36U1, 36U2, 36U3, and 36U4, and V-phase windings 36V1, 36V2, 36V3, and 36V4. Four W-phase windings 36W1, 36W2, 36W3, and 36W4 are provided.

  In the first winding stator 30, a wide magnetic core 38 is provided on the surface of the teeth 34 on the rotor 20 side. Each wide magnetic core 38 is formed in a plate-like member having a larger extent (here, one size larger) than the teeth 34 in a plane substantially orthogonal to the rotation shaft 28, and rotates with the first winding stator 30. The area facing the child 20 is increased to reduce the magnetic resistance in the gap portion, so that more magnetic flux of the rotor 20 can be linked. The wide magnetic core 38 may be omitted.

  The first back yoke core 33, each tooth 34, and each wide magnetic core 38 are made of a soft magnetic material such as a dust core or a laminated steel plate. These may be formed as a whole, or may be divided and combined as appropriate according to manufacturing needs.

  The second winding stator 40 has the same configuration as the first winding stator 30, that is, the second back yoke core 43 (corresponding to the first back yoke core 33) and a plurality of teeth 44. A second stator core 42 (corresponding to the first stator core 32) having a plurality of windings 46U5, 46U6, 46U7, 46U8, 46V5, 46V6, 46V7, 46V8, 46W5. 46W6, 46W7, 46W8 (corresponding to the windings 36U1, 36U2, 36U3, 36U4, 36V1, 36V2, 36V3, 36V4, 36W1, 36W2, 36W3, 36W4, hereinafter, provided in the second winding stator 40 When the windings are generically referred to, they are simply referred to as a winding 46) and a wide magnetic core 48 (corresponding to the wide magnetic core 38).

  The stator cores 32 and 42 do not have to be exactly the same in terms of shape, material, etc., but are preferably at least magnetically substantially the same.

  The first winding stator 30 and the second winding stator 40 will be described in relation to each other.

  In the first winding stator 30, the windings 36 are alternately arranged around the rotation shaft 28 in three phases, more specifically, from the upper side of FIG. 2 with the winding 36U1 as a reference. As viewed clockwise, winding 36V1, winding 36W1, winding 36U2, winding 36V2, winding 36W2, winding 36U3, winding 36V3, winding 36W3, winding 36U4, winding 36V4 and winding 36W4 are arranged. It is arranged in an annular shape in order. In the second winding stator 40, three phases are alternately arranged around the rotating shaft 28 in the same direction as the first winding stator 30, and more specifically, with reference to the winding 46U5. 2, the winding 46V5, winding 46W5, winding 46U6, winding 46V6, winding 46W6, winding 46U7, winding 46V7, winding 46W7, winding 46U8, winding 46V8 clockwise , Windings 36W8 are arranged in an annular shape in the order of arrangement.

  Further, with respect to the U phase, the windings 36U1, 36U2, 36U3, 36U4 and the windings 46U5, 46U6, 46U7, 46U8 are provided at positions facing each other across the rotor 20. Regarding the V phase, the windings 36V1, 36V2, 36V3, 36V4 and the windings 46V5, 46V6, 46V7, 46V8 are opposed to each other, and also for the W phase, the windings 36W1, 36W2, 36W3, 36W4 and the windings 46W5, 46W6, 46W7, and 46W8 are in a positional relationship facing each other.

  That is, the first winding stator 30 and the second winding stator 40 are provided with the windings 36 and 46 with substantially the same arrangement mode and substantially the same number of turns.

  Thus, by making the magnetic field generation mode by the windings 36 and 46 and the magnetic circuit in the both-winding stators 30 and 40 equivalent, the generation mode of the magnetic attractive force in the both-winding stators 30 and 40 can be changed. In the same manner, the tilt of the rotor 20 can be more effectively suppressed by the action described later.

  Each of the first winding stator 30 and the second winding stator is provided with an even number (four in this case) of in-phase windings 36.46. Then, the even-numbered windings 36 and 46 are arranged at substantially equal intervals around the rotation axis 28, and the plane between them is a plane of symmetry with respect to the arrangement of the U phase, the V phase, and the W phase. It is the structure arrange | positioned in the symmetrical position.

  With respect to the rotor 20, the winding direction of each winding 36 of the first winding stator 30 is opposite to the winding direction of each winding 46 of the second winding stator 40. In other words, the winding direction of each winding 36 of the first winding stator 30 is the same as the winding direction of each winding 46 of the second winding stator 40 when viewed from one side along the rotation axis 28. Direction. Here, the winding direction of the windings 36 and 46 does not mean in which direction the coil wire is actually wound, but is connected as described later, and the current flows from the power source side to the neutral point side. Means the direction from which the end of the power supply side is wound around the teeth 34 and 44 to reach the end of the neutral point. In the following description of each embodiment and each modification, the winding direction means the same content. In FIG. 2, the arrows attached to the outer peripheral sides of the windings 36U1, 36V1, 36W1 and the windings 46U5, 46V5, 46W5 indicate the winding directions of the windings 36, 46. In the following description of each embodiment, the arrow provided on the outer peripheral side of the winding indicates the winding direction.

  Thus, when a current of a predetermined phase flows through the winding 36 of the first winding stator 30 and the winding 46 of the second winding stator 40 on both sides, for example, the U-phase windings 36U1, 36U2, 36U3 , 36U4 and 46U5, 46U6, 46U7, 46U8, a magnetic flux flows downward in FIGS. 1 and 2 through the windings 36U1, 36U2, 36U3, 36U4 of the upper first winding stator 30. The magnetic flux flows upward in FIGS. 1 and 2 through the windings 46U5, 46U6, 46U7, and 46U8 of the lower second winding stator 40. Since one of the windings 36U1, 36U2, 36U3, 36U4 and the windings 46U5, 46U6, 46U7, 46U8 face each other with the rotor 20 in between, the first winding stator 30 and the second winding The stator 40 constitutes a continuous magnetic circuit.

  The windings 36 and 46 are connected in the following manner. That is, as shown in FIG. 3, with respect to the U phase, the windings 36U1, 36U2, 36U3, 36U4 provided in the first winding stator 30 and the rotation axis with respect to the windings 36U1, 36U2, 36U3, 36U4. The windings 46U5, 46U6, 46U7, and 46U8 that are opposed to each other across 28 and are provided on the second winding stator 40 side are connected in series, so that a plurality of in-phase series connection winding sets can be obtained. It is configured. Each winding stator 30, 40 is provided with an even number (four in this case) of U-phase windings 36U1, 36U2, 36U3, 36U4 and windings 46U5, 46U6, 46U7, 46U8, which are plane-symmetric. Since the rotary shaft 28 is disposed at a position opposite to the U-phase windings 36U1, 36U2, 36U3, and 36U4 on the first winding stator 30 side, that is, around the rotary shaft 28. The U-phase windings 46U5, 46U6, 46U7, and 46U8 of the second winding stator 40 are disposed at positions shifted by a mechanical angle of 180 °. Therefore, those arranged in such a positional relationship, that is, winding 36U1 and winding 46U7, winding 36U2 and winding 46U8, winding 36U3 and winding 46U5, winding 36U4 and winding 46U6 are connected to each other. By connecting each in series, a plurality (four in this case) of in-phase series connection winding sets are formed. A plurality (four in this case) of in-phase series connection winding sets are connected in parallel.

  Further, the V-phase and W-phase windings 36 and 46 are similarly connected. Then, one end of the U-phase, V-phase, and W-phase in-phase series connection winding sets is star-connected to one common neutral point 60, and the other end is connected to the three-phase AC power supply side. . Thereby, circulating current can be reduced.

  In this embodiment, only two windings 36 and 46 located opposite to each other with the rotary shaft 28 therebetween are described in series. However, more windings 36 and 46 are connected in series. A specific form in that case will be described later.

  According to the axial gap type rotating machine 10 configured as described above, since the winding stators 30 and 40 are disposed on both ends of the rotor 20, the rotor 20 is short in the direction of the rotation shaft 28 and in the radial direction. It is easy to become a long structure. Then, if the rotor 20 is tilted even slightly, the gap difference between the two winding stators 30 and 40 tends to increase in the vicinity of the outer peripheral portion of the rotor 20. In particular, since the length of the holding portion that holds the rotor 20 by the rotating shaft portion tends to be short in the form of the rotor 20, the rotor 20 tends to be inclined.

  When the gap length is minimized at a predetermined U-phase winding (for example, the winding 36U1) of the first winding stator 30 due to the inclination of the rotor 20, the rotation axis 28 is sandwiched between the rotor 20 and the first winding stator 30. The gap length is also minimized at the U-phase winding (for example, winding 46U7) portion of the second winding stator 40 at the opposing position. In these U-phase windings (for example, the windings 36U1 and 46U7), the gap length is reduced, so that the magnetic resistance is reduced. The inductance of the U-phase winding (for example, the winding 36U1 and the winding 46U7) is caused by many magnetic shorts in the field magnet magnetic body 24 on the first winding stator 30 side. As a result, the current under a predetermined voltage decreases, the number of magnetic flux passing through decreases, and the magnetic attractive force decreases. In addition, since these U-phase windings (for example, winding 36U1 and winding 46U7) are connected in series, the current becomes smaller than the increase in their own inductance and the number of passing magnetic fluxes is increased by their interaction. Decreases and magnetic attraction force decreases.

  At the same time, a predetermined U-phase winding (for example, windings 36U3 and 46U5) facing the rotor 20 with respect to the portion where the gap becomes small as described above, and the rotating shaft 28 In the U-phase winding (for example, winding 36U3) portion of the first winding stator 30 that is in the opposite position across the gap, the gap length is maximized at the same time, and the magnetic resistance is increased there. In the U-phase winding (for example, the winding 36U3 and the winding 46U5), the inductance due to the fact that there is little magnetic short circuit in the field element magnetic body 24 on the second winding stator 40 side. As a result, the current under a predetermined voltage increases and the number of passing magnetic fluxes increases to increase the magnetic attractive force. In addition, since these U-phase windings (for example, winding 36U3 and winding 46U5) are connected in series, their interaction increases the current more than the reduction of its own inductance and the number of passing magnetic fluxes. Increases and the magnetic attractive force increases.

  In addition, an in-phase series connection winding set including windings (for example, windings 36U1 and 46U7) corresponding to the portion where the gap is reduced, and windings (for example, windings 36U3 and 46U5) corresponding to the portion where the gap is increased. Are connected in parallel. For this reason, even if the current of one in-phase series winding connection set is affected or increased, the current of the other in-phase series winding connection set decreases or increases. As the degree of decrease increases, the degree of increase and decrease in magnetic attraction force increases, and the tilt of the rotor 20 is corrected more effectively. The same applies to other U and W phases.

  As described above, between the rotor 20 and the both-winding stators 30 and 40, the magnetic attraction force is reduced in the portion where the gap is small, and the magnetic attraction force is increased in the portion where the gap is large. It is possible to eliminate and suppress the inclination. In particular, as the rotor 20 is rotated at a higher speed, the difference in impedance increases, and it is considered that the tilt correction is corrected more effectively.

  Further, since each in-phase series connection winding set is described in a mode in which only two windings 36 and 46 located at positions facing each other across the rotation shaft 28 are connected in series, the outer periphery of both rotors 20 is around. A large number of in-phase series connection winding sets are formed. For this reason, it is possible to effectively suppress the inclination of the rotor 20 by controlling the suction force at more places around the rotation shaft 28.

  FIG. 4 is a view showing a modification of the wiring connection diagram. In this modification, the U-phase, V-phase, and W-phase in-phase series-connected winding groups (these are windings 36 and 46 connected in series in the same manner as in FIG. 3) are arranged adjacent to each other in three phases. Are combined in a star connection to neutral points 62a, 62b, 62c, and 62d that are independent of each other. More specifically, the winding 36U1 and the winding 46U7 that is opposed to the winding 36U1 and that is provided on the second winding stator 40 side are connected in series. Thus, an in-phase series connection winding set is configured. Similarly, a winding 36V1 adjacent to the winding 36U1 and a winding 46V7 provided on the second winding stator 40 side, which is opposed to the winding 36V1 with the rotary shaft 28 interposed therebetween, are connected in series. The in-phase series connection winding set is configured by being connected to. Further, similarly, the winding 36W1 adjacent to the winding 36V1 and the winding 46W7 provided on the second winding stator 40 side, which is opposed to the winding 36W1 with the rotary shaft 28 interposed therebetween. Are connected in series to form an in-phase series connection winding set. Three of the in-phase series connection winding sets of these phases are star-connected at the neutral point 62a.

  Similarly, the other three in-phase series-connected winding groups of each phase are also star-connected at neutral points 62b, 62c and 62d, respectively. That is, here, four star connection sets are configured. And the wiring of each phase of each star connection set is connected to the common U-phase, V-phase, and W-phase power lines. Such a connection mode is also based on the power source, and in-phase series connection winding sets of each phase (for example, those including windings 36U1 and 46U7, windings including windings 36U2 and 46U8, windings) This includes the case where the wire 36U3 and the winding 46U5 and the wire 36U4 and the winding 46U6 are connected in parallel.

  In such a connection mode, when the gap length is minimized at a predetermined phase of the winding (for example, winding 36U1) in the first winding stator 30, the second winding fixed opposite to the rotation shaft 28 is sandwiched. The gap length is minimized even in the winding on the child 40 side (for example, the winding 46U7). In addition, the gap length is maximized at portions of the windings (for example, the winding 36U3 and the winding 46U5) facing each other with the rotor 20 interposed therebetween. And the inclination of the rotor 20 can be eliminated and suppressed by the same action as the connection mode shown in FIG.

  For example, assuming that a current flows from the U phase to the V phase, it can be considered that the U phase windings 36 and 46 and the V phase windings 36 and 46 are connected in series. Then, if the gap length is minimized at the portions of the windings 36U1, 46U7, 36V1, and 46V4, the current flowing through them becomes small. On the other hand, since the gap length is maximum in the portions of the windings 36U3, 46U5, 36V3, and 46V5, the current flowing through them becomes large. Therefore, even if the gap length between the windings 36 and 46 is considered to be minimum or maximum as described above, the tilt of the rotor 20 can be eliminated by the same operation as described above.

  In addition, such a connection mode is advantageous in that the connecting portions between the windings 36 and 46 can be reduced because the windings 36 and 46 are star-connected at different neutral points 62a, 62b, 62c and 62d. There is.

  Further, in the connection mode shown in FIG. 3 or the connection mode shown in FIG. 4, the predetermined winding 36 in the first winding stator 30 and a position shifted by 180 ° with respect to the predetermined winding 36. Since it is necessary to connect in series with the coil | winding 46 by the side of a certain 2nd winding stator 40, the wiring between them will become long. Therefore, the connecting ends of the windings 36 and 46 are drawn out from the inner peripheral side, wired along the radial direction, and arranged along the outer peripheral side of both the winding stators 30 and 40, so that the cross wiring 64 is provided. By connecting (see FIG. 1), the cross wiring 64 can be shortened.

  Further, in each in-phase series connection winding set, the windings 36 and 46 provided on one of the winding stators 30 and 40 are arranged on the power supply side and short-circuited to be connected to the power supply. Windings 36, 46 provided on the other of the stators 30, 40 are arranged on the neutral points 60, 62a, 62b, 62c, 62d side, and the neutral points 60, 62a, 62b, 62c, 62d side are provided. By connecting the windings 36 and 46 in parallel, the connection portion for connecting the windings 36 and 46 in parallel can be accommodated in one of the winding stators 30 and 40 to shorten the connection length. For example, in the case of the connection mode shown in FIG. 3, with respect to the U phase, one end of the windings 36U1, 36U2, 36U3, 36U4 is short-circuited in the first winding stator 30 and connected to the power source. 46 U 6, 46 U 7, 46 U 8 may be connected in the second winding stator 40 and connected to the neutral point 60. In addition, what is necessary is just to connect similarly about another V phase and W phase. 4, the windings 36U1, 36U2, 36U3, and 36U4 are connected to the neutral points 62a, 62b, 62c, and 62d in the first winding stator 30 for the U phase, respectively. The windings 46U5, 46U6, 46U7, 46U8 may be short-circuited in the second winding stator 40 and connected to the power source. In addition, what is necessary is just to connect similarly about another V phase and W phase.

{Second Embodiment}
Next, an axial gap type rotating machine according to the second embodiment will be described. In addition, about the structure similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. FIG. 5 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  The axial gap type rotating machine 110 includes a rotor 120 having a saliency instead of the rotor 20 in the axial gap type rotating machine 10 so that a switched reluctance that obtains a rotating motion by a reluctance torque is provided. The motor is configured.

  That is, the rotor 120 does not have a permanent magnet and is made of a soft magnetic material. The rotor 120 includes a rotor yoke portion 122 that is connected and fixed to a rotation shaft portion (not shown), and a plurality (eight in this case) of salient pole portions 124 that protrude from the rotor yoke portion 122 toward the outer peripheral side. Have. The salient pole portions 124 are arranged at substantially equal intervals around the rotary shaft 28 and exhibit saliency with respect to the two winding stators 30 and 40.

  The rotor 120 is rotated by generating a continuous magnetic attraction force along the circumferential direction by the windings 36 and 46.

  In the axial gap type rotating machine 110 configured as a switched reluctance motor as described above, the same effects as those of the first embodiment can be obtained with respect to the inclination of the rotor 120. At this time, the winding directions of the windings 36 and 46 of the first winding stator 30 and the first winding stator 40 may be reversed when viewed from the top of the page. At that time, the magnetic circuits formed by the upper and lower stators 30 and 40 are symmetrical and independent with respect to the axial center plane of the rotor 120. Therefore, the difference in inductance becomes significant.

{Third embodiment}
Next, an axial gap type rotating machine according to the third embodiment will be described. In addition, about the structure similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. FIG. 6 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  This axial gap type rotating machine 210 is an example employing a so-called complementary pole structure, and the arrangement of windings is different from that of the first embodiment. That is, in the first winding stator 230, the windings 236U1, 236W1, 236V1, 236U2, 236W2, 236V2 (hereinafter simply referred to as the winding 236 when these windings are collectively referred to) are connected to the teeth 34. Every other winding is wound in the circumferential direction. In other words, every other winding 36 in the first embodiment is omitted in the circumferential direction. In the second winding stator 240, the windings 246U3, 246W3, 246V3, 246U4, 246W4, 246V4 (hereinafter, these windings are simply referred to as the windings 246) are connected to the teeth 44. Every other winding is wound in the circumferential direction. In other words, every other winding 46 in the first embodiment is omitted in the circumferential direction.

  In order to obtain the same capability as in the first embodiment, the number of turns of each of the windings 236 and 246 is preferably double that of the windings 36 and 46.

  In addition, as shown in FIG. 7, the connection mode of the windings 236 and 246 is opposite to the winding 236 </ b> U <b> 1 provided in the first winding stator 230 with respect to the U phase with the rotary shaft 28 interposed therebetween. The winding 246U3 on the second winding stator 240 side is connected in series to form an in-phase series connection winding set. Further, those having the same positional relationship, that is, the winding 236U2 and the winding 246U4 are connected in series to form an in-phase series connection winding set. These two in-phase series connection winding sets are connected in parallel. Similarly, the windings 236 and 246 are connected to the V phase and the W phase, and these are star-connected to a common neutral point 260.

  Of course, as shown in FIG. 4, each in-phase series connection winding group may be divided into two and star-connected to different neutral points, and these may be connected in parallel to the power source. .

  In this axial gap type rotating machine 210, when a three-phase alternating current is passed through the windings 236 and 246, the teeth 34 and 44 around which the windings 236 and 246 are wound correspond to the current flowing through the windings 236 and 246. Magnetic flux is generated. Further, in the teeth 34 and 44 in which the windings 236 and 246 are not wound, the first phase and the second phase (for example, the U phase and the V phase) generated in the teeth 34 and 44 on both sides thereof are used. Magnetic flux generates magnetic flux according to the third phase (for example, W phase). Thereby, the same rotating magnetic field as in the first embodiment can be generated.

  Also in the axial gap type rotating machine 210 according to the present embodiment, it is possible to obtain the same effect as the first embodiment with respect to the inclination of the rotor 20. Furthermore, since the number of windings 236 and 246 can be reduced, the number of windings 236 and 246 connected in parallel is reduced, and the connection can be made simpler and more compact.

{Fourth embodiment}
An axial gap type rotating machine according to the fourth embodiment will be described. FIG. 8 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  This axial gap type rotating machine 410 is an example of a concentrated winding configuration with 6 poles and 9 slots. That is, the axial gap type rotating machine 410 includes a rotor 420 and a first winding stator 430 and a second winding stator 440 provided on both sides of the rotor 420.

  The rotor 420 is different in that the 8-pole rotor 20 in the first embodiment is changed to a 6-pole rotor 420, and the other configuration is the same as that of the rotor 20.

  The first winding stator 430 and the second winding stator 440 are different from the 12-slot first winding stator 30 and the second winding stator 40 in the first embodiment in the following points. . That is, the first winding stator 430 has nine windings 436U1, 436V1, 436W1, 436U2, 436V2, 436W2, 436U3, 436V3, 436W3 (hereinafter collectively referred to as the first stator core 432). In this case, the winding is simply referred to as a winding 436 around the rotation axis 28 in this order. The second winding stator 440 has nine windings 446U4, 446V4, 446W4, 446U5, 446V5, 446W5, 446U6, 446V6, 446W6 (hereinafter collectively referred to as the second stator core 442). In this case, it is a 9-slot configuration in which windings 446 are simply arranged around the rotation axis 28 in this order. Further, when viewed from the rotor 420, the winding directions of the windings 436 and 446 of both the winding stators 430 and 440 are the same direction, that is, different winding directions when viewed from one side of the rotating shaft 28. . Other configurations of the winding stators 430 and 440 are the same as those of the winding stators 30 and 40. With this arrangement, the combined magnetic flux of the V-phase winding 446 adjacent to the first winding stator 430 and the U-phase winding 446 is equal to −W because U + V + W = 0. On the other hand, the W phase comes to the position of the second winding stator 440 corresponding to the intermediate position between the U phase and the V phase of the first winding stator 430. Since the W-phase winding 446 is wound in the opposite direction to that on the first winding stator 430 side, it is −W, and it can be seen that the same magnetic circuit as that of the first embodiment is formed.

  In this way, when each winding stator 430, 440 has an odd number of windings 436, 446 for each phase, the winding stator 430, 440 is placed at a position facing the rotation shaft 28 between the winding stators 430, 440. In order to arrange 436 and winding 446, each winding 436 on the first winding stator 430 side and each winding 446 of the second winding stator 440 are arranged in U phase, V phase, and W phase. Are arranged in a positional relationship shifted from the plane-symmetrical position with the plane between them as a plane of symmetry by 180 ° about the rotation axis 28. Thereby, for example, the winding 436U1 and the winding 446U4 face each other with the rotating shaft 28 interposed therebetween.

  The connection mode in this axial gap type rotating machine 410 is as shown in FIG. That is, with respect to the U phase, a predetermined winding 436U1 of the first winding stator 430 and a winding 446U4 on the second winding stator 440 facing the rotation axis 28 across this are connected in series. Thus, an in-phase series connection winding set is configured. Similarly, the winding 436U2 and the winding 446U5, and the winding 436U3 and the winding 446U6 are connected in series to form an in-phase series connection winding set. These three in-phase series connection winding sets are connected in parallel. Further, the U phase and the W phase are similarly connected, and they are star-connected at a common neutral point 462. Of course, as shown in FIG. 4, each in-phase series connection winding group may be divided into three, star-connected to different neutral points, and these may be connected in parallel to the power source.

  In the axial gap type rotating machine 410, the other two-phase windings 446 of the second winding stator 440 are opposed to the predetermined-phase winding 436 of the first winding stator 430. For example, the winding 446V5 and the winding 446W5 are opposed to the winding 436U1. The combined magnetic field generated by the other two-phase windings 446 (for example, winding 446V5 and winding 446W5) of the second winding stator 440 is a predetermined phase on the first winding stator 430 side from U + V + W = 0. The magnetic field corresponds to the winding 436 (for example, 436U1). As a result, the two-winding stators 430 and 440 can rotate the rotor 420 by generating a rotating magnetic field synchronized with each part along the circumferential direction.

  In the axial gap type rotating machine 410, when odd-numbered windings 436 and 446 are provided in the first winding stator 430 and the second winding stator 440, respectively, the winding 436 and the winding 446 are connected. This is a configuration for disposing the rotating shaft 28 at opposed positions. Also with this axial gap type rotating machine 410, the same operational effects as in the first embodiment can be obtained.

{Fifth embodiment}
An axial gap type rotating machine according to the fifth embodiment will be described. FIG. 10 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  This axial gap type rotating machine 510 is an example of a concentrated winding configuration with 6 poles and 9 slots. The first winding stator 530 has nine windings 536U1, 536V1, 536W1, 536U2, 536V2, 536W2, 536U3, 536V3, 536W3 (hereinafter collectively referred to as the first stator core 532). Is a nine-slot configuration in which windings 536 are simply arranged around the rotary shaft 28 in this order. The second winding stator 540 has nine windings 546U4, 546V4, 546W4, 546U5, 546V5, 546W5, 546U6, 546V6, 546W6 (hereinafter collectively referred to as the second stator core 542). In this case, the winding is simply referred to as a winding 546 around the rotation axis 28 in this order. The arrangement relationship between the windings 536 and 546 is the same as that in the fourth embodiment. That is, the first winding stator 530 and the second winding stator 540 have basically the same configuration as the first winding stator 430 and the second winding stator 440 in the fourth embodiment. . A different point is the winding direction of the windings 536 and 546. That is, when viewed from the rotor 520, the winding directions of the windings 536 and 546 of both the winding stators 530 and 540 are different from each other, that is, when viewed from one side of the rotating shaft 28. Yes.

  These windings 536 and 546 are also connected in the same manner as in the fourth embodiment.

  Further, the rotor 520 includes a plurality of permanent magnets 522a that present magnetic poles on the first winding stator 530 side, a plurality of permanent magnets 522b that exhibit magnetic poles on the second winding stator 540 side, and a rotor back yoke 524. have.

  Each permanent magnet 522a presents alternating magnetic poles on the first winding stator 530 side, and each permanent magnet 522b presents alternating magnetic poles on the second winding stator 540 side, which are on both sides of the rotor back yoke 524. Affixed. Further, each permanent magnet 522a and each permanent magnet 522b are independent via a rotor back yoke 524, and are independent magnetic circuits between the first winding stator 530 and the second winding stator 540, respectively. Is supposed to form.

  In such a rotor 520, an independent magnetic circuit is formed on the first winding stator 530 side and the second winding stator 540 side, so that the windings 536 and 546 are arranged at desired positions. Further, the positions of the permanent magnets 522a and the permanent magnets 522b can be shifted. Therefore, for each phase, the winding 536 provided in the first winding stator 530 and the winding 546 provided in the second winding stator 540 can be arranged to face each other with the rotating shaft 28 interposed therebetween. The magnetic pole by each permanent magnet 522a or each permanent magnet 522b can be set.

  Here, each of the permanent magnets 522a and each of the predetermined portions in the circumferential direction of the rotor 520 have the same magnetic poles on both the surface on the first winding stator 530 side and the surface on the second winding stator 540 side. By setting a magnetic pole by the permanent magnet 522b, the windings 536 and 546 are arranged in the above positional relationship.

  Also with this axial gap type rotating machine 510, the same effect as the first embodiment can be obtained. In addition, since separate magnetic circuits are formed on both surfaces of the rotor 520, by setting each magnetic pole according to the installation mode of the windings 536 and 546 of both winding stators 530 and 540, each phase The windings 536 and 546 can be disposed at positions facing each other with the rotation shaft 28 interposed therebetween. In addition, since separate magnetic circuits are formed on both surfaces of the rotor 520, and the magnetic path cross-sectional area of the rotor back yoke 524 tends to increase, a difference in inductance tends to occur on both surfaces of the rotor 520. . For this reason, when the rotor 520 tilts, a difference in magnetic attractive force is more likely to occur, and the tilt of the rotor 520 can be more effectively eliminated.

{Sixth embodiment}
An axial gap type rotating machine according to the sixth embodiment will be described. FIG. 11 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  This axial gap type rotating machine 610 is an example of a concentrated winding configuration with 6 poles and 9 slots, and includes a rotor 620, a first winding stator 530 and a second winding stator 540. Since the first winding stator 530 and the second winding stator 540 have the same configuration as that described in the fifth embodiment, description thereof is omitted here.

  The rotor 620 includes a plurality of permanent magnets 624 disposed around the rotation shaft 28 and a core 622 formed of a soft magnetic material disposed between the permanent magnets 624.

  Each permanent magnet 624 is formed in a plate shape, and is connected in a ring shape via an arc-shaped rod-shaped core 622. Further, each permanent magnet 624 is magnetized along the circumferential direction of a circle centered on the rotation shaft 28, and the magnetization direction is mutually in the relationship between the adjacent ones along the circumferential direction. The reverse direction. The rotor 620 is a mode in which magnetic flux leakage to the rotating shaft portion is prevented, such as being fixed to the rotating shaft portion formed of a nonmagnetic material or fixed to the rotating shaft portion via a nonmagnetic boss. It is fixed to the rotating shaft.

  The rotor 620 exhibits alternating magnetic poles for both the first winding stator 530 and the second winding stator 540 at each core 622 portion. At this time, independent magnetic circuits are formed for each of the first winding stator 530 and the second winding stator 540.

  For this reason, there exists an effect similar to the said 5th Embodiment. In addition, independent magnetic circuits can be formed for each of the first winding stator 530 and the second winding stator 540 with a relatively small number of permanent magnets 624.

{Seventh embodiment}
An axial gap type rotating machine according to the seventh embodiment will be described. FIG. 12 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  This axial gap type rotating machine 710 includes a rotor 720, a first winding stator 730, and a second winding stator 740, and is configured as a 12 pole 18 slot configuration.

  The rotor 720 includes a plurality of permanent magnets 722 a that present magnetic poles on the first winding stator 730 side, a plurality of permanent magnets 722 b that exhibit magnetic poles on the second winding stator 740 side, and a rotor back yoke 724. is doing.

  Each permanent magnet 722a presents alternating magnetic poles on the first winding stator 730 side, and each permanent magnet 722b presents alternating magnetic poles on the second winding stator 740 side, which are on both sides of the rotor back yoke 724. Affixed. In addition, each permanent magnet 722a and each permanent magnet 722b are independent via the rotor back yoke 724, and are independent magnetic circuits between the first winding stator 730 and the second winding stator 740, respectively. Is supposed to form.

  Moreover, in each part of the circumferential direction of the rotor 720, the magnetic pole by each permanent magnet 722a and each permanent magnet 722b is set so that a different magnetic pole may be exhibited with respect to the 1st winding stator 730 and the 2nd winding stator 740. Has been.

  Further, the first winding stator 730 has eighteen windings 736U1, 736V1, 736W1, 736U2, 736V2, 736W2, 736U3, 736V3, 736W3, 736U4, 736V4, 736W4 with respect to the first stator core 732. 736U5, 736V5, 736W5, 736U6, 736V6, 736W6 (hereinafter simply referred to as winding 736) are arranged around the rotary shaft 28 in this order. Further, the second winding stator 740 has 18 windings 746U7, 746V7, 746W7, 746U8, 746V8, 746W8, 746U9, 746V9, 746W9, 746U10, 746V10, 746W10, with respect to the second stator core 742. 746 U 11, 746 V 11, 746 W 11, 746 U 12, 746 V 12, 746 W 12 (hereinafter simply referred to as a winding 746) are arranged around the rotating shaft 28 in this order. The windings 736 of the first winding stator 730 and the windings 746 of the second winding stator 740 are symmetrical with respect to the U-phase, V-phase, and W-phase arrangement. It is arranged at a plane symmetrical position. The winding direction of each of the windings 736 and 746 is the reverse direction with respect to the rotor 720, in other words, the same direction when viewed from one side along the rotation shaft 28.

  Further, the connection manner of the windings 736 and 746 is as shown in FIG. That is, first, a predetermined-phase winding 736 (for example, winding 736U1) provided on the first winding stator 730 and the second winding stator 740 side facing the rotation axis 28 therebetween. Are connected in series with a predetermined phase winding 746 (for example, winding 746U10). In addition to this, in-phase windings that exist in the vicinity, more specifically, in-phase windings that are adjacent to each other across the other-phase windings (for example, winding 736U2 and winding 746U11). Are also connected in series to form an in-phase series connection winding set. Similarly, when an in-phase series connection winding group is configured, four in-phase series connection winding groups are configured for each phase, and each in-phase series connection winding group is connected in parallel for each phase. Then, those connected in parallel for each phase are further star-connected to a common neutral point 760. Of course, as in FIG. 4, each of the in-phase series connection winding sets described above may be divided into a plurality of pieces and star-connected via independent neutral points, and these may be further connected in parallel to the power source.

  Also with this axial gap type rotating machine 710, the same effect as that of the fifth embodiment can be obtained. In addition, since the four windings 736 and 746 existing in the vicinity are connected in series as described above, the number of parallel connections is reduced, and the connection can be simplified.

  In addition, if the magnetic attraction force can be controlled by changing the gap at at least three locations along the circumferential direction of the rotor 720, the tilt of the rotor 720 can be effectively corrected. For this reason, when each winding stator 730, 740 is provided with 18 or more windings 736, 746, it can be said that this is an effective configuration capable of correcting the inclination of the rotor 720 while reducing the number of connections.

{Eighth embodiment}
An axial gap type rotating machine according to the eighth embodiment will be described. FIG. 14 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  The axial gap type rotating machine 810 is different from the seventh embodiment in the magnetic pole of the rotor 820 and the winding direction of the windings 836 and 846.

  That is, the rotor 820 includes a plurality of permanent magnets 822a that exhibit magnetic poles on the first winding stator 830 side and a plurality of permanent magnets that exhibit magnetic poles on the second winding stator 840 side, as with the rotor 720. 822b and a rotor back yoke 824. And in each part of the circumferential direction of the rotor 820, the magnetic pole by each permanent magnet 822a and each permanent magnet 822b is set so that the same magnetic pole may be exhibited with respect to the 1st winding stator 830 and the 2nd winding stator 840. Has been.

  In addition, 18 windings 836U1, 836V1, 836W1, 836U2, 836V2, 836W2, 836U3, 836V3, 836W3, 836U4, 836V4, 836W4, 836U5 with respect to the first stator core 832 of the first winding stator 830. , 836V5, 836W5, 836U6, 836V6, 836W6 (hereinafter referred to simply as winding 836) are arranged around the rotating shaft 28 in this order. In addition, the second winding stator 840 has eighteen windings 846U7, 846V7, 846W7, 846U8, 846V8, 846W8, 846U9, 846V9, 846W9, 846U10, 846V10, 846W10, with respect to the second stator core 842. 846 U 11, 846 V 11, 846 W 11, 846 U 12, 846 V 12, 846 W 12 (hereinafter simply referred to as a winding 846) are arranged around the rotation axis 28 in this order. The winding directions of the windings 836 and 846 are the same with respect to the rotor 820, in other words, the reverse direction when viewed from one side along the rotation shaft 28.

  The remaining configuration of the axial gap type rotating machine 810 is the same as that of the axial gap type rotating machine 710.

  Also with this axial gap type rotating machine 810, the same operational effects as in the seventh embodiment can be obtained.

{Ninth embodiment}
An axial gap type rotating machine according to the ninth embodiment will be described. FIG. 15 is an exploded perspective view showing the axial gap type rotating machine according to the present embodiment.

  This axial gap type rotating machine 910 has a distributed winding 4-pole 24-slot configuration, and includes a rotor 920, a first winding stator 930 and a second winding stator 940.

  The rotor 920 has a plurality (four in this case) of permanent magnets 922 and an intervening core 924 interposed between the permanent magnets 922, which are connected in a substantially ring shape. Each permanent magnet 922 is magnetized along the direction of the rotation axis 28 and exhibits alternating magnetic poles along the circumferential direction with respect to the first winding stator 930 and the second winding stator 940. The intervening core 924 exhibits reverse saliency by increasing the q-axis inductance indicating the gap between the poles than the d-axis inductance indicating the magnetic pole center by the permanent magnet 922.

  The first winding stator 930 includes a first back yoke core 933 and a plurality (24 in this case) of the first back yoke core 933 projecting around the rotation shaft 28 on the surface of the rotor 920 side. A first stator core 932 having teeth 934 and windings 936U1, 936U2, 936U3, 936U4, 936V1, 936V2, 936V3, 936V4, 936W1, 936W2, 936W3, 936W4 (hereinafter referred to simply as Winding 936).

  The windings 936U1, 936U2, 936U3, and 936U4 are the uppermost layer (the layer closest to the first back yoke core 933), and a plurality of teeth are arranged in that order with one tooth 934 interposed therebetween. 934 are distributed. The windings 936V1, 936V2, 936V3, and 936V4 are intermediate layers and are distributedly wound in the same manner as described above. Further, the windings 936W1, 936W2, 936W3, and 936W4 are distributed in the same manner as described above in the lowermost layer (the layer closest to the rotor 920). Note that the windings 936 of each phase are arranged in a positional relationship shifted by 1/3 of the circumference around the rotation axis.

  Further, the second winding stator 940 includes a second back yoke core 943 and a plurality of (here, 24) protruding around the rotation shaft 28 on the surface of the second back yoke core 943 on the rotor 920 side. ) Teeth 944 and windings 946U5, 946U6, 946U7, 946U8, 946V5, 946V6, 946V7, 946V8, 946W5, 946W6, 946W7, 946W8 (hereinafter collectively referred to as these) , Simply referred to as winding 946). Each winding 946 of each phase is distributedly wound in the same manner as the first winding stator 930. The positional relationship between the respective windings 936 on the first winding stator 930 side and the respective windings 946 on the second winding stator 940 side is a positional relationship in which the phases are symmetrical with respect to the plane between them. It is in. In addition, the winding direction of each coil | winding 936,946 is set so that the adjacent thing may become a reverse direction for every layer.

  The windings 936 and 946 are connected as shown in FIG. That is, a predetermined winding 936 (for example, winding 936U1) of a predetermined phase of the first winding stator 930 and an in-phase of the second winding stator 940 facing the rotation winding 28 with respect to the predetermined winding 936 (for example, winding 936U1). A predetermined winding 946 (for example, winding 946U7) is connected in series to form an in-phase series connection winding set. The other predetermined phase windings 936 and 946 are similarly connected in series, and four in-phase series connection winding sets are configured for each phase. And the in-phase series connection winding group of each phase is connected in parallel, and these are further star-connected to a common neutral point 960. A magnetic field for rotating the rotor 720 is generated by a combined magnetic field of the windings 936 and 946 by causing a three-phase alternating current to flow through the windings 936 and 946. Of course, it may be connected in the same manner as shown in FIG.

  Thus, the axial gap type rotating machine 910 in which the windings 936 and 946 are distributedly wound can achieve the same operational effects as those of the first embodiment. In particular, in the distributed winding mode, the size of the gap interval between the plurality of teeth 934 and 944 is affected by the inductance of one winding 936 and 946, so that the effect of inclination correction becomes significant.

{Modifications}
In addition, although the said embodiment demonstrated the example which star-connected each coil | winding, you may connect the in-phase series connection winding group for every phase one by one or several delta connection.

  In addition, as the power source for driving each axial gap type rotating machine, the above-mentioned effects can be obtained regardless of whether the voltage is constant or the current is constant.

  The axial gap type rotating electrical machine described above can be used as a motor or a generator.

  Moreover, the structure which concerns on each said embodiment and modification can be suitably combined mutually, unless it opposes mutually.

It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 1st Embodiment. It is a disassembled perspective view which shows the state which further decomposed | disassembled the axial gap type rotary machine same as the above. It is a connection diagram of an axial gap type rotary machine same as the above. It is a figure which shows the modification of the connection diagram of a coil | winding. It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 2nd Embodiment. It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 3rd Embodiment. It is a connection diagram of an axial gap type rotary machine same as the above. It is a figure which shows the axial gap type rotary machine which concerns on 4th Embodiment. It is a connection diagram of an axial gap type rotary machine same as the above. It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 5th Embodiment. It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 6th Embodiment. It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 7th Embodiment. It is a connection diagram of an axial gap type rotary machine same as the above. It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 8th Embodiment. It is a disassembled perspective view which shows the axial gap type rotary machine which concerns on 9th Embodiment. It is a connection diagram of an axial gap type rotary machine same as the above.

Explanation of symbols

10; 110; 210; 410; 510; 610; 710; 810; 910 Axial Gap Rotating Machine 20; 120; 420; 520; 620; 720; 820; 920 Rotor 22; 522a, 522b; 624; 722a, 722b 822a, 822b; 922 permanent magnet 24 field magnet magnetic body 28 rotating shaft 30; 230; 430; 530; 730; 830; 930 first winding stator 32; 432; 532; 732; 832; 932 first fixed Child core 33 First back yoke core 34; 934 teeth 36, 36U1, 36U2, 36U3, 36U4, 36V1, 36V2, 36V3, 36V4, 36W1, 36W2, 36W3, 36W4; 236, 236U1, 236W1, 236V1, 236U2, 236W2, 236V2; 436 436U1, 436V1, 436W1, 436U2, 436V2, 436W2, 436U3, 436V3, 436W3; 536,536U1,536V1,536W1,536U2,536V2,536W2,536U3,536V3,536W3; 736,736U1,736V1,736W1,736U2,36 736W2, 736U3, 736V3, 736W3, 736U4, 736V4, 736W4, 736U5, 736V5, 736W5, 736U6, 736V6, 736W6; 836U2, 836V1, 836W2, 836U3, 836V3, 836V3, 836U4, 3636 836W4, 836U5, 836V5, 836W5, 836U6, 836V6, 836 6; 936, 936U1, 936U2, 936U3, 936U4, 936V1, 936V2, 936V3, 936V4, 936W1, 936W2, 936W3, 936W4 Winding 38 Wide magnetic core 40; 240; 440; 540; 740; 840; 940 Child 42; 442; 542; 742; 842; 942 Second stator core 43 Second back yoke core 44; 944 teeth 46, 46U5, 46U6, 46U7, 46U8, 46V5, 46V6, 46V7, 46V8, 46W5, 46W6, 46W7 246W8; 246, 246U3, 246W3, 246V3, 246U4, 246W4, 246V4; 446, 446U4, 446V4, 446W4, 446U5, 446V5, 446W5, 446U6, 446V6, 446W6 546, 546U4, 546V4, 546W4, 546U5, 546V5, 546W5, 546U6, 546V6, 546W6; 746W11, 746U12, 746V12, 746W12; 844, 846U7, 846V7, 846W7, 846U8, 846V8, 846W8, 846U9, 846V9, 846W9, 846U10, 846V10, 846W10, 846U11, 846W8446, 4646 946U6, 946U7, 946U8, 946V , 946V6, 946V7, 946V8, 946W5, 946W6, 946W7, 946W8 Winding 48 Wide magnetic core 60; 62a, 62b, 62c, 62d; 260; 462; 760; 960 Neutral point 64 Wiring 122 Rotor yoke part 124 Salient pole part 524; 724; 824 Rotor back yoke 622 Core 924 Intervening core

Claims (16)

A rotor (20; 120; 420; 520; 620; 720; 820; 920) disposed rotatably about a rotation axis (28);
First winding stators (30; 230; 430; 530; 730; 830; 930) disposed on both sides of the rotor in the direction of the rotation axis so as to face the rotor with a gap therebetween. ) And a second winding stator (40; 240; 440; 540; 740; 840; 940);
With
In-phase windings (36, 46; 236, 346; 436, 446; 536, 546; 736, 746; 836, 846; 936, 946) are respectively connected to the first winding stator and the second winding stator. ) Are provided,
The windings (36; 236; 436; 536; 736; 836; 936) provided in the first winding stator are opposed to the windings with the rotating shaft interposed therebetween with respect to the windings of the same phase. A plurality of in-phase series coils connected in series with the windings (46; 346; 446; 546; 746; 846; 946) provided in the second winding stator. An axial gap type rotating machine (10; 110; 210; 410; 510; 610; 710; 810; 910) in which a connection winding set is configured and these in-phase series winding connection sets are connected in parallel. The axial gap type rotating machine according to claim 1,
The first winding stator (30; 230; 430; 530; 730; 830; 930) and the second winding stator (40; 240; 440; 540; 740; 840; 940) are substantially Each winding (36, 46; 236, 346; 436, 446; 536, 546; 736, 746; 836, 846; 936, 946) with the same arrangement and substantially the same number of turns.
The first winding stator and the second winding stator are magnetically substantially the same stator core (30, 40; 230, 240; 430, 440; 530, 540; 730, 740; 830, 840; 930, 940), axial gap type rotating machines (10; 110; 210; 410; 510; 610; 710; 810; 910). An axial gap type rotating machine according to claim 1 or 2,
Each in-phase series connection winding set includes a winding (36; 236; 436; 536; 936) provided on the first winding stator (30; 230; 430; 530; 930), and this winding. Windings 46; 346; 446; 546 provided in the second winding stator (40; 240; 440; 540; 940), which are at positions facing each other with respect to the rotating shaft. 946) only in series, axial gap type rotating machines (10; 110; 210; 410; 510; 610; 910). An axial gap type rotating machine according to claim 1 or 2,
Each in-phase series-connected winding group is positioned opposite to the winding (736; 836) provided on the first winding stator (730; 830) with the rotating shaft interposed therebetween. In addition to the windings (746; 846) provided in the second winding stator (740; 840), and windings (736, 746; 836) in the vicinity of those windings. , 846) are also connected in series, an axial gap type rotating machine (710; 810). It is an axial gap type rotary machine in any one of Claims 1-4,
Each of the first winding stator (30; 230; 730; 830; 930) and the second winding stator (40; 240; 740; 840; 940) has an in-phase winding (36, 46; 236, 346; 736, 746; 836, 846; 936, 946), and the even number of windings are arranged at substantially intervals around the rotation axis,
The first winding stator side windings (36; 236; 736; 836; 936) and the second winding stator side windings (46; 346; 746; 846; 946) are: Axial gap type rotating machines (10; 110; 210; 710; 810; 910), which are arranged in plane-symmetric positions with the plane between them as a plane of symmetry. It is an axial gap type rotary machine in any one of Claims 1-4,
Each of the first winding stator (430; 530) and the second winding stator (440; 540) has an odd number of three-phase windings (436, 446; 536, 546) for each phase. And the odd number of windings are arranged at substantially intervals around the rotation axis,
The respective windings (436; 536) on the first winding stator side and the respective windings (446; 546) on the second winding stator side are plane-symmetrical positions having a plane between them as a symmetry plane. Axial gap type rotating machines (410; 510; 610) which are in a positional relationship shifted from each other by 180 ° around the rotation axis. It is an axial gap type rotary machine in any one of Claims 1-4,
The rotor (520; 720; 820) includes a permanent magnet (522a; 722a; 822a) having a magnetic pole on the surface of the first winding stator (530; 730; 830) and the second winding stator. (540; 740; 840) and a permanent magnet (522b; 722b; 822b) having a magnetic pole on the surface thereof are provided so as to form an independent magnetic circuit,
For each winding in phase, windings (536; 736; 836) provided on the first winding stator and windings (546; 746; 846) provided on the second winding stator; So that the magnetic poles on the surface of the rotor on the side of the first winding stator and the magnetic poles on the surface of the side of the second winding stator are set. An axial gap type rotating machine (510; 710; 820). It is an axial gap type rotary machine in any one of Claims 1-7,
Axial gap type rotating machines (10; 110; 210; 410; 510; which are star-connected to one neutral point (60; 260; 462; 760; 960) common to each of the in-phase series-connected winding sets. 610; 710; 810; 910). It is an axial gap type rotary machine in any one of Claims 1-7,
An axial gap type rotating machine (10) in which each of the in-phase series connection winding sets is star-connected to independent neutral points (62a, 62b, 62c, 62d). It is an axial gap type rotating machine in any one of Claims 1-9,
The rotor (20; 420; 920) is an axial gap type rotating machine (10; 410; 910) having a permanent magnet (22; 922) magnetized along the rotation axis direction. The axial gap type rotating machine according to claim 10,
An axial gap type rotating machine (10; 410) in which a field element magnetic body (24) made of a soft magnetic body is provided at both ends of the permanent magnet along the rotation axis direction. It is an axial gap type rotating machine in any one of Claims 1-9,
The rotor (620)
A plurality of magnets arranged around the rotation axis and magnetized along the circumferential direction of a circle centered on the rotation axis and magnetized in opposite directions between adjacent ones along the circumferential direction A permanent magnet (624);
A core (622) made of a soft magnetic material and disposed between the permanent magnets;
An axial gap type rotating machine (610) having It is an axial gap type rotating machine in any one of Claims 1-9,
The axial gap type rotating machine (110), wherein the rotor (120) is a reluctance rotor having saliency at a portion facing the first winding stator and the second winding stator. It is an axial gap type rotary machine in any one of Claims 1-13,
The first winding stator and the second winding stator have an axial gap type rotating machine (10; 110; 210) having a core (34, 44; 934, 944) around which the winding is wound. 410; 510; 610; 710; 810; 910). It is an axial gap type rotary machine in any one of Claims 1-14,
An axial gap type rotating machine (10; 110; 210; 410; 510) in which the windings (36, 46; 236, 346; 436, 446; 536, 546; 736, 746; 836, 846) are concentratedly wound. 610; 710; 810). It is an axial gap type rotary machine in any one of Claims 1-14,
An axial gap type rotating machine (910) in which the windings (936, 946) are distributedly wound.

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