JP6545025B2 - Electric rotating machine - Google Patents

Description

  The present invention relates generally to a rotating electrical machine effective for application to a generator, and more particularly to a rotating electrical machine with reduced pulsation torque.

  Conventionally, in a generator represented by a rotating electrical machine of this type, energy such as water power and thermal power is converted into rotational energy, and the converted rotational energy is used to drive the generator to generate electric power. A commonly used generator is wound on a rotor having a permanent magnet having an N pole and an S pole attached to a rotating shaft, an armature core having magnetic poles corresponding to the number of magnetic poles formed by the permanent magnets, and an armature core. An AC magnetic field is generated in the armature core by rotating the rotor, and an AC voltage is generated in the power generation coil by the generated AC magnetic field.

  By the way, in order to supply a sufficient magnetic field to a coil wound thereon, an armature core constituting a rotating electrical machine such as a generator or a motor is desirably disposed close to a permanent magnet attached to a rotor. When the permanent magnet and the armature core are disposed close to each other, a suction force is exerted between the permanent magnet and the armature core. This suction force becomes a particularly large value if a strong permanent magnet is used to improve the output of the rotary electric machine.

  Also, this suction force varies depending on the rotation angle of the rotor and affects the rotational torque of the rotor, but the rotational torque, ie, the magnetic attraction between the armature core and the rotor When the pulsating torque (cogging torque) is increased, the rotational angular velocity of the rotor varies, and in the case of a general generator, problems such as abnormal vibration and noise occur. Further, for example, in the case of a generator used for wind power generation etc., not only the starting torque to start moving the rotor increases, but also the resistance to continuously rotate the rotor increases, It becomes difficult to generate power in a state.

  Therefore, as a well-known related technology for suppressing such a problem due to the pulsating torque, for example, a "generator" which reduces the influence on the rotating shaft by the cogging torque generated by the means for supplying a magnetic field adsorbing the yoke (Refer to Patent Document 1) and “Rotating electric machine” (refer to Patent Document 2) that can smoothly rotate the rotor by suppressing the influence of the pulsating coil on the rotor.

JP, 2009-240159, A JP, 2013-106462, A

  The technology according to Patent Document 1 described above has a structure in which a plurality of electromotive means are connected to one rotation shaft as a power generation means for suppressing a pulsating torque, and each electromotive means is supplied with a rotational force from the outside. The permanent magnet has the magnetic poles alternately arranged along the circumferential direction with respect to the rotation axis, the coil wound around the outer circumference of the rotation axis via the bobbin, and the magnetic flux generated from the permanent magnet And an attracting means comprising a plurality of attracted pieces disposed radially and circumferentially with respect to the rotation axis and magnetized by the permanent magnet, and permanent by the attracting means. It has the function of reducing the pulsating torque, which is the attractive force exerted on the rotating shaft, by counteracting to some extent the attractive force acting between the magnet pole and the attracted piece.

  However, in the generator according to Patent Document 1, the structure of each of the electricity generating means constituting the power generation means is complicated, and it is difficult to miniaturize the power generation means, and a rotor requiring smooth rotation performance is required. There is a problem that it is difficult to apply effectively to the rotating electric machine that it has.

  Further, the technology according to Patent Document 2 mentioned above is a plurality of rotary electric machines for suppressing the pulsating torque, which are arranged concentrically with the rotation axis and at regular intervals parallel to the rotation axis so that the magnetization directions alternate. A rotor provided with a permanent magnet and a magnetic body disposed with a nonmagnetic material interposed between each permanent magnet, and an air gap between the front end and the back end in the axial direction of the rotation axis of each permanent magnet Between the permanent magnets adjacent in the circumferential direction of the rotation shaft, the stator core being arranged to be connected via the stator core and the coil wound around the stator core, both the nonmagnetic member and the nonmagnetic member The magnetic members are disposed adjacent to each other.

  However, in the rotating electrical machine according to Patent Document 2, the magnetic field supplying means of the rotor is constituted by a single annular structure in the extending direction (longitudinal direction) of the rotating shaft, and the performance of magnetic force generation is limited. Therefore, there is a problem that the influence of the pulsating torque on the rotation of the rotor can not be sufficiently suppressed.

  The present invention has been made to solve such problems, and the technical problem is that the influence of the pulsating torque on the rotation of the rotor can be minimized and the rotor can be rotated more smoothly. To provide a rotating electrical machine.

In order to solve the above technical problems, a basic configuration of a rotating electrical machine according to the present invention comprises a plurality of permanent magnet parts arranged concentrically with the rotation axis and at equal intervals parallel to the rotation axis so that magnetization directions alternate. And a rotor including a disk-shaped rotating body having a configuration in which a magnetic body disposed with a nonmagnetic material interposed between the plurality of permanent magnet portions , and both ends of the magnetic path of the rotor are closed. , at least in the circumferential direction and a plurality of C-shaped stator core arranged to surround the rotor at equal intervals, a few minutes of the core portion poles before Symbol plurality of C-shaped stator core of the rotary shaft A coil is wound and configured at a location, and each of the plurality of permanent magnet portions is configured by joining a pair of permanent magnets whose magnetization directions are inclined with respect to the rotation axis. I assume.

  According to the present invention, with the above configuration, the influence of the pulsating torque on the rotation of the rotor can be suppressed as much as possible, and the rotor can be rotated more smoothly. Problems, configurations, and effects other than those described above will be apparent from the description of the embodiments below.

BRIEF DESCRIPTION OF THE DRAWINGS It is the external appearance perspective view shown in order to demonstrate the technical outline of the rotary electric machine used as the premise of this invention. It is a top view shown in order to explain the rotor of another structure applicable to the rotating electrical machine shown in FIG. 1, (a) relates to a 12-pole rotor, (b) relates to a 6-pole rotor is there. It is the schematic of the principal part shown breaking in part in order to demonstrate one form of the torque which works on the rotor with which the rotary electric machine shown in Drawing 1 is equipped. It is the schematic of the principal part which partially broken and shown in order to demonstrate the other form of the torque which acts on the rotor with which the rotary electric machine shown in FIG. 1 is equipped. It is the schematic of the principal part shown breaking in part in order to demonstrate another form of the torque which works on the rotor with which the rotary electric machine shown in Drawing 1 is equipped. It is the schematic of the principal part shown breaking in part in order to demonstrate the other form of the torque which acts on the rotor with which the rotary electric machine shown in Drawing 1 is equipped. In the schematic of the principal part shown partially broken to explain still another form of the torque that works when the rotor provided in the rotating electrical machine shown in FIG. 1 is equipped with another C-shaped stator core is there. The rotor provided in the rotary electric machine shown in FIG. 1 is shown to explain one mode of suppressing operation of the pulsating torque by the pulse current supplied to the coil wound around them as the C-shaped stator core described in FIG. 7 It is a state transition diagram of the principal part. The rotor provided in the rotary electric machine shown in FIG. 1 is illustrated to explain another form of the pulsating torque suppression operation by the pulse current supplied to the coils wound around them as the C-shaped stator core described in FIG. 7 It is a state transition diagram of the principal part. BRIEF DESCRIPTION OF THE DRAWINGS It is the external appearance perspective view shown in order to demonstrate the basic composition of the rotary electric machine which concerns on the Example of this invention. It is a figure for demonstrating the internal structure of the rotary electric machine shown in FIG. 9, (a) is side sectional drawing in the axial direction of the rotating shaft of a rotary electric machine, (b) is the AA line direction in (a) A cross-sectional view, (c) is a cross-sectional view taken along the line B-B in (a).

  Hereinafter, examples of the rotating electrical machine according to the present invention will be described in detail with reference to the drawings. However, at first, in order to help the understanding of the rotary electric machine of the present invention, a technical outline of the rotary electric machine as a premise will be described.

  FIG. 1 is an external perspective view shown to explain the technical outline of a rotary electric machine 10 on which the present invention is based. FIG. 2 is a plan view for explaining the rotor having another structure applicable to the rotating electric machine 10. FIG. 2 (a) relates to a 12-pole rotor, and FIG. 2 (b) is a 6-pole. It is a figure regarding the rotor of.

  Referring to FIG. 1, this rotating electrical machine 10 functions as a 24-pole generator, and is disposed concentrically with the rotating shaft 11 and at equal intervals parallel to the rotating shaft 11 so that the magnetization directions alternate. , (Here, 24) permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24), and these permanent magnets 12M (12M-1, 12M-2, 12M-3) ,..., 12M-24), the rotor 12 is a disc-like rotating body having a configuration in which the magnetic plates 12F and 12R are interposed with the nonmagnetic plate 12C interposed therebetween, and the permanent magnet 12M (12M-1 , 12M-2, 12M-3,..., 12M-24) in the extension direction (which may be called an axial direction) of the rotation axis 11 (the upper surface in FIG. 1) and the back end (the upper surface) In FIG. 1 to connect with the lower side via A plurality of (in this case, 21) C-shaped stator iron cores 13 (13-1, 13-2, 13-3,..., 13-21) and C-shaped stator iron cores 13 (21 poles) 13-1, 13-2, 13-3,..., 21) and coils 14 (14 a, 14 b, 14 c, 14 d, 14 e) wound around the straight portions of the core portion.

  However, the C-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21) here is accommodated in a housing (not shown), and the rotation shaft passing through the rotor 12 11 is supported by the housing via a bearing not shown.

  Among the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) adjacent to each other in the circumferential direction of the rotation shaft 11 of the rotor 12 (rotational direction W of the rotor 12). A nonmagnetic plate 12C and magnetic plates 12F and 12R disposed adjacent to the nonmagnetic plate 12C are interposed. The case where a stainless steel plate, a Bakelite plate etc. are used can be illustrated as nonmagnetic board 12C, and the case where electromagnetic steel plate is used as magnetic boards 12F and 12R can be illustrated. The angle θ in the circumferential direction of each portion in the laminate of the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) and the magnetic plates 12F, 12R and the nonmagnetic plate 12C is Set to be equal.

  For example, as shown in FIG. 2 (a), the rotor 12 has θ1 = θ2 in the case of 12 poles, and in the case of 6 poles as shown in FIG. 2 (b), θ3 = θ4 (where θ3 = The relationship is established such that θ4> θ1 = θ2. The coils 14 (14a, 14b, 14c, 14d, 14e) wound around the straight portions of the C-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21) are, for example, series-connected Connect to Thus, for example, when the rotating shaft 11 is driven from the outside, the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) → C-shaped stator core 13 (13-1, 13- 2, 13-3, ..., 13-21)-> The magnetic flux passing through the permanent magnet 12M (12M-1, 12M-2, 12M-3, ..., 12M-24) is interrupted, and the coil 14 (14a, 14b, 14c) , 14d, 14e) to obtain an AC output.

  Incidentally, the coil 14 (14a, 14b, 14c, 14d, 14e) is the core portion of the C-shaped stator iron core 13 (13-1, 13-2, 13-3,..., 13-21) for 21 poles. The linear part may be selected and provided as at least one place instead of all provided in each linear part in, for example, a configuration in which only the coils 14a and 14e in a place near the discoid rotating body of the rotor 12 are wound It can be illustrated.

  The number of permanent magnets 12M of the rotor 12 is twenty four in FIG. 1, twelve in FIG. 2 (a), and six in FIG. 2 (b). Also in this case, the ratio of the C-shaped stator core 13 to the number of poles 21 is set not to be an integer, whereby the rotor 12 of the rotary electric machine 10 can be rotated more smoothly.

  FIG. 3 is a schematic view of an essential part, which is partially broken to show one form of the torque acting on the rotor 12 provided in the rotary electric machine 10. As shown in FIG. Also, FIG. 4 is another form of torque acting on a similar rotor 12, FIG. 5 is another form of torque acting on a similar rotor 12, and FIG. It is the schematic of a part. 3 to 6 show permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24), the magnetic plates 12F, 12R, the nonmagnetic plate 12C, which constitute the rotary electric machine 10. And permanent magnets 12M (12M-1, 12M-2, 12M-3,... 12M-24) of C-shaped stator iron cores 13 (13-1, 13-2, 13-3,..., 13-21) It is the figure of the local part which developed and showed the part which counters along the outer surface of permanent magnet 12M (12M-1, 12M-2, 12M-3, ... 12M-24).

  Referring to FIG. 3, here, the front surface of the permanent magnet 12M (12M-1, 12M-2, 12M-3,..., 12M-24) disposed on the rotor 12 has a C-shaped stator core 13 (13- The back surface of the permanent magnet 12M (12M-1, 12M-2, 12M-3,. It shows a state of being in a position opposed to the back surface of the V-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21) on the entire surface.

  Referring to FIG. 4, in this case, the rotor 12 is rotated, and the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) are moved to the left by 1/2 of the magnet width. Shows a state, and in this state, the permanent magnet 12M (12M-1, 12M-2) showing the second half of the moving direction of the permanent magnet 12M (12M-1, 12M-2, 12M-3, ..., 12M-24) , 12M-3, ..., 12M-24) and the magnetic plate 12R are front and back surfaces of the C-shaped stator core 13 (13-1, 13-2, 13-3, ..., 13-21). It shows that it faces to.

  Referring to FIG. 5, the rotor 12 further rotates here, and the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) move to the left direction by 1/2 of the magnet width. In this state, the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) are C-shaped stator iron cores 13 (13-1, 13-2, 13-3, , 13-21) do not face either the front or the back.

  Referring to FIG. 6, the rotor 12 is further rotated here, and the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) move to the left by 1/2 the magnet width. In this state, the front half portion of the permanent magnet 12M (12M-1, 12M-2, 12M-3,..., 12M-24) in the rotation direction and the magnetic material plate 12F have a C-shaped stator core 13 ( The appearance facing the front and back of 13-1, 13-2, 13-3, ..., 13-21) is shown.

  By the way, in the rotating electrical machine 10, “reluctance torque”, which is a torque based on a force at which a magnet attracts a magnetic substance such as an iron core, and “torque based on a force at which magnetic poles repel each other or attract each other. "Torque" acts.

  When the permanent magnet 12M (12M-1, 12M-2, 12M-3,..., 12M-24) is in the position shown in FIG. 3, for example, the magnetic flux φm by the permanent magnet 12M-2 is the permanent magnet 12M-2 → C The front surface of the V-shaped stator core 13-1 → the back surface of the C-shaped stator core 13-1 → the permanent magnet 12M-2 and interlinks with the coil 14 wound around the C-shaped stator core 13-1. With this linkage, an electromotive force e is induced in the coil 14.

  When an electromotive force e is generated in the coil 14 and a load current i flows, a load magnetic flux 2φc is generated. The load magnetic flux 2φc passes through the magnetic plates 12F and 12R disposed mainly in front of and behind the permanent magnet 12M-2. For example, if the relative permeability μs of the permanent magnet 12M-2 = 1 and the relative permeability μs of the magnetic plates 12F and 12R = 6000, most of the load magnetic flux 2φc passes through the magnetic plates 12F and 12R.

  Further, when the permanent magnet 12M (12M-1, 12M-2, 12M-3,..., 12M-24) is in the position shown in FIG. 4, for example, a part αφm of the magnetic flux φm by the permanent magnet 12M-2 is permanent The magnet 12M-2 → the front of the C-shaped stator core 13-1 → the back of the C-shaped stator core 13-1 → the permanent magnet 12M-2. At this time, a reluctance torque is acting on the permanent magnet 12M-2 to rotate the rotor 12 in the right direction. The reluctance torque causes the pulsating torque. Further, a part αφ m of the magnetic flux φ m described above is linked to the coil 14, passes through the magnetic plates 12F and 12R, and returns to the permanent magnet 12M-2. With this linkage, an electromotive force e is induced in the coil 14 wound around the C-shaped stator core 13-1, a load current ic flows in the coil 14, and a load magnetic flux 2φc (φc1 + φc2) is generated.

  The load magnetic flux 2φc passes through the magnetic plates 12F and 12R disposed mainly in front of and behind the permanent magnet 12M-2 in the rotational direction. That is, a part .phi.c1 of the load magnetic flux 2.phi.c passes through the magnetic plate 12R, and the other part .phi.c2 passes through the magnetic plate 12F. Thus, the magnetic fluxes φc1 + βφm and the magnetic fluxes φc2-βφm pass through the magnetic material plates 12F and 12R of the rotor 12, respectively. These magnetic fluxes φc1 + βφm and φc2-βφm generate a torque for driving the rotor 12 in the left direction.

  The torque for driving the rotor 12 in the left direction is opposite to the reluctance torque described above that acts between the permanent magnet 12M-2 and the C-shaped stator core 13-1, so the permanent magnet 12M-2 The pulsation torque based on the reluctance torque acting between the C-shaped stator core 13-1 and the C-shaped stator core 13-1 is suppressed.

  Furthermore, when the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) are in the position of FIG. 5, for example, they flow from the permanent magnets 12M-2 into the C-shaped stator core 13-1. Since the magnetic flux cancels out in the coil 14, no electromotive force e is induced in the coil 14.

  In addition, when the permanent magnet 12M (12M-1, 12M-2, 12M-3,..., 12M-24) is in the position of FIG. 6, for example, a part αφm of the magnetic flux φm by the permanent magnet 12M-2 is permanent The magnet 12M-2 → the front of the C-shaped stator core 13-1 → the back of the C-shaped stator core 13-1 → the permanent magnet 12M-2. At this time, reluctance torque acts on the permanent magnet 12M-2 to rotate the rotor 12 in the left direction. The reluctance torque causes the pulsating torque. Further, a part αφ m of the magnetic flux φ m described above is linked to the coil 14, passes through the magnetic plates 12F and 12R, and returns to the permanent magnet 12M-2. With this linkage, an electromotive force e is induced in the coil 14 wound around the rear C-shaped stator core 13-1, a load current ic flows in the coil 14, and a load magnetic flux 2φ c is generated.

  The load magnetic flux 2φc passes through the magnetic plates 12F and 12R disposed mainly in front of and behind the permanent magnet 12M-2 in the rotational direction. That is, a part .phi.c1 of the load magnetic flux 2.phi.c passes through the magnetic plate 12F, and the other part .phi.c2 passes through the magnetic plate 12R.

  Thus, the magnetic fluxes φc1 + βφm and the magnetic fluxes φC2-βφm pass through the magnetic material plates 12F and 12R of the rotor 12, respectively. The magnetic fluxes φc1 + βφm and φC2−βφm generate torques to drive the rotor 12 rightward.

  The torque for driving the rotor 12 in the right direction is opposite to the reluctance torque described above that acts between the permanent magnet 12M-2 and the C-shaped stator core 13-1, so the permanent magnet 12M-2 The pulsation torque based on the reluctance torque acting between the C-shaped stator core 13-1 and the C-shaped stator core 13-1 is suppressed. The shape of the C-shaped stator core 13 (13-1, 13-2, 13-3, ..., 13-21) is the same as that of the permanent magnet 12M (12M-1, 12M-2, 12M-3, ..., 12M). If it is possible to connect via a gap between the front end (lower side in FIG. 1) and the back end (upper side in FIG. 1) of -24), other shapes are applied It is possible.

  As described above, according to the rotating electrical machine 10, it is possible to suppress the pulsation torque based on the reluctance torque.

  By the way, in the rotary electric machine 10 described above, the C-shaped stator iron cores 13 (13-1, 13-2, 13-3,..., 13-21) are arranged at intervals in the rotational direction of the rotor 12. ing. For this reason, for example, when the rotor 12 is at the position shown in FIG. 5, the magnetic flux φm coming from the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) is not effectively used.

  In FIG. 7, another C-shaped stator core (13-1 ′, 13-2 ′, 13-3 ′,..., 13-21 ′) is provided to the rotor 12 provided in the rotating electric machine 10 described above. It is the schematic of the principal part shown breaking in part in order to demonstrate the further form of the torque which works in case.

  Referring to FIG. 7, a second stator core having the same shape as C-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21), which is the first stator core here. Prepare another C-shaped stator core (13-1 ', 13-2', 13-3 ', ..., 13-21') to be the C-shaped stator core to be the first stator core 13 (13-1, 13-2, 13-3, ..., 13-21). With such a configuration, the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) of the rotor 12 are C-shaped stator iron cores 13 (13-1, 13-2, 13 .., 13-21), (13-1 ', 13-2', 13-3 ',... 13-21'), which are to be placed at positions that affect either The power of 10 can be increased.

  Further, in the rotating electrical machine 10 described above, in order to suppress the pulsation torque based on the reluctance torque, the reaction torque generated by the magnetic flux φc1 + βφm passing through the magnetic material plates 12F and 12R of the rotor 12 and the magnetic flux φc2-βφm is used However, this reaction torque is applied to the C-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21), (13-1 ', 13-2', 13-3 ',. , 13-21 ') can be generated by exciting the coil 14.

  8-1 shows the C-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21) described in FIG. 7 for the rotor 12 provided in the rotating electrical machine 10 described above. 13-1 ′, 13-2 ′, 13-3 ′,..., 13-21 ′) are shown to explain one mode of suppressing operation of pulsation torque by the pulse current supplied to the coil 14 wound around them. It is a state transition diagram of the main part. 8-2 is related with the other form of the suppression operation | movement of the pulsation torque by the pulse current supplied to the coil 14 similar. 8-1 and 8-2, the rotor 12 and the armature portion of the rotary electric machine 10 are shown as expanded in the circumferential direction, and (1) to (5) and (6) to (10). In the following, indicates the moving position of the rotor 12 at each point in time.

  As shown in FIGS. 8-1 (2) to (3) and FIGS. 8-2 (6) to (7), for example, C-shaped stator iron cores 13-1 and 13-1 facing the permanent magnet 12M-1. Among the sides of ', the facing area of the permanent magnet 12M-1 and the side a of the C-shaped stator core 13-1 preceding in the rotational direction (left direction in the illustrated example) is C-shaped. When the area of the side b of the stator core 13-1 'is smaller than the facing area of the permanent magnet 12M-1, ie, the side a of the C-shaped stator core 13-1 preceding in the rotational direction and the permanent magnet 12M-1 When the reluctance torque acting during the rotation is less than the reluctance torque acting between the side b of the C-shaped stator core 13-1 ′ following in the rotational direction and the permanent magnet 12M-1 (in this case, , C-shaped stator in which the rotor 12 of the rotating electrical machine 10 follows in the rotational direction The C-shaped stator core 13-1 is driven in the direction opposite to the rotation direction by the reluctance torque acting between the side b of the core 13-1 'and the permanent magnet 12M-1). A pulse current is supplied to the wound coil 14 so that a magnetic pole is generated in a direction for attracting the permanent magnet 12M-1, or the permanent magnet 12M is wound on the coil 14 wound around a C-shaped stator core 13-1 '. The pulse current is supplied so that the magnetic pole is generated in the direction of repelling -1. Incidentally, the coil 14 for pulsation suppression here can also be shared for power generation.

  Here, in FIGS. 8-1 and 8-2, the C-shaped stator core 13 (13-1, 13-2, 13-3,... 13-21), (13-1 ', 13-2', The magnetic poles at positions indicated by "N" and "S" on 13-3 ', ..., 13-21') indicate the magnetic poles formed by the pulse current supplied to the coil 14 wound around the magnetic poles. By causing the magnetic poles in this manner, for example, the reluctance torque acting between the permanent magnet 12M-1 and the side b of the C-shaped stator iron core 13-1 'following in the rotational direction is suppressed to reduce the reluctance torque. Can suppress the pulsating torque based on

  Also, a pulse current is supplied to drive the rotor 12 so that the magnetic poles are generated in the direction of attracting or repelling the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24). Pulsating torque can be similarly suppressed by this.

  C-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21) facing the permanent magnets 12M (12M-1, 12M-2, 12M-3,..., 12M-24) , (13-1 ', 13-2', 13-3 ',..., 13-21'). The rotation direction of the rotor 12 due to the suction force is different from the rotation direction (drive direction) of the rotor 12 For example, as shown in FIG. 4, the center of the permanent magnet 12M (12M-1, 12M-2, 12M-3,..., 12M-24) has a C-shaped stator core 13 (13-1, 13-2, 13). C-3 when the torque is generated in the rotor 12 in the direction opposite to the rotational direction, and the C-shaped stator core 13 (13-1, 13) -2, 13-3, ..., 13-21), (13-1 ', 13-2', 13-3) , ..., 13-21 ') by supplying a pulse current in a direction for attracting or repelling the permanent magnets 12M (12M-1, 12M-2, 12M-3, ..., 12M-24) to the coil 14 The pulsating torque can be suppressed by generating a torque against the pulsating torque.

  In addition, the coil 14 for suppressing pulsation is formed at one location (for example, the C-shaped stator core 13-1) of the C-shaped stator core 13 (13-1, 13-2, 13-3,..., 13-21). In a circuit in which they are wound in series and wound around all of the other C-shaped stator cores (13-1 ', 13-2', 13-3 ', ..., 13-21'), which may be wound. Pulsed current may be supplied. Incidentally, the supply timing of the pulse current supplied to the pulsation suppressing coil 14 can be obtained from a known position sensor or the like that detects the rotational position of the rotor 12.

  The rotating electrical machine 10 described above has a configuration according to Patent Document 2 proposed by the present inventor. In this case, the permanent magnets 12M (12M-1, 12M) serving as magnetic field supplying means of the rotor 12 are used. -12, 12M-3, ..., 12M-24) are constituted by a single annular structure in the extending direction of the rotating shaft 11, and there is a limit to the performance of magnetic force generation, so the rotor 12 of pulsating torque is It can not be said that the influence exerted on the rotation of can be sufficiently suppressed. Therefore, in the present invention, it is a technical object to provide a rotating electrical machine that can suppress the influence of the pulsating torque on the rotation of the rotor 12 as much as possible and can rotate the rotor 12 more smoothly.

  FIG. 9 is an external perspective view shown to explain the basic configuration of the rotary electric machine 100 according to the embodiment of the present invention. FIG. 10 is a view for explaining the internal structure of the rotary electric machine 100, and FIG. 10 (a) is a side sectional view in the axial direction of the rotary shaft 11 of the rotary electric machine 100, and FIG. The figure which made the cross section in the AA line direction in a), the figure (c) is the figure made the cross section in the BB line direction in the figure (a).

  Referring to FIG. 9, this rotary electric machine 100 functions as a 12-pole generator, and is disposed concentrically with the rotary shaft 11 and at equal intervals parallel to the rotary shaft 11 so that the magnetization directions alternate. , 12M-12, and a nonmagnetic plate between the permanent magnets 12M (12M-1, 12M-2,... 12M-12). A plurality of (here, three) disc-shaped rotary magnet bodies 15a, 15b, 15c of a configuration in which magnetic plates 12F, 12R are disposed with 12C interposed therebetween. And a plurality of (in this case, two) disc-shaped stator iron cores 16a, 16b, and a rotor 120 configured to be arranged so as to be stacked, and disc-shaped rotating magnet bodies 15a, 15b, and 15c. Each permanent magnet 12M (12M-1 Among 12M-2, ..., 12M-12), the extending direction of the rotating shaft 11 at the front end portion in the extending direction of the rotating shaft 11 at the foremost portion and the extending portion of the rotating shaft 11 at the foremost portion Of the magnetic path formed by the disc-shaped rotating magnet bodies 15a, 15b, 15c and the disc-shaped stator iron cores 16a, 16b in the rotor 120, respectively. A plurality of (14 here) C-shaped stator iron cores 13 (13-1, 13-2, ..., 13) arranged to surround the rotor 120 at equal intervals in the circumferential direction of the rotary shaft 11 so as to close both ends. Each permanent magnet 12M (where the disc-shaped stator cores 16a and 16b are disposed on the front side of the disc-shaped rotary magnet bodies 15a, 15b and 15c except for the foremost surface) 12M-1, 12M-2, ... Each permanent magnet 12M (12M-1, 12M-2, ..., 12M-12) at a position disposed on the back surface side except the back surface end in the extension direction of the rotation shaft 11 of 12M-12). It is arranged to connect between the front side end in the extending direction of the rotary shaft 11 with an air gap, and is arranged at equal intervals in the circumferential direction of the rotary shaft 11 of the disk-shaped stator iron cores 16a and 16b. Coils 17a and 17b are wound around the iron core portions for 14 poles, respectively, and the iron core portions in each C-shaped stator iron core 13 (13-1, 13-2, ..., 13-14) for 12 poles The coils 14, 14a and 14e are wound at selected locations of the respective straight portions in FIG. 9 (however, FIG. 9 shows winding conditions only at locations near the exposed location of the rotor 120). ing.

  However, also for the C-shaped stator core 13 (13-1, 13-2, ..., 13-14), another C-shaped stator core (13-1 ', 13) as described in FIG. The rotary electric machine 100 itself is housed in a housing (not shown), and the rotary shaft 11 passing through the rotor 120 is supported by the housing via a bearing (not shown). It is supposed to be Here, the C-shaped stator core 13 (13-1, 13-2, ..., 13-14) corresponds to the C-shaped stator core 13 (13-1, 13-2, 13- shown in FIG. 1). 3, the dimension in the extension direction of the rotation shaft 11 becomes taller than in the case of 3,..., 13-21), (13-1 ', 13-2', 13-3 ',..., 13-21') There is.

  Among them, a nonmagnetic material is provided between the permanent magnets 12M (12M-1, 12M-2,... 12M-12) adjacent in the circumferential direction of the rotation shaft 11 of the rotor 120 (rotational direction W of the rotor 120). The plate 12C and the magnetic plates 12F and 12R disposed adjacent to the plate 12C are interposed. Here too, the case of using a stainless steel plate, Bakelite plate or the like can be illustrated as the nonmagnetic plate 12C, and the case of using an electromagnetic steel plate can be illustrated as the magnetic plates 12F and 12R.

  Further, as shown in FIG. 9 and FIG. 10 (b), the permanent magnets 12M (12M-1, 12M-2,..., 12M constituting the respective disk-shaped rotary magnet bodies 15a, 15b, 15c here) The circumferential width of -12) is the magnetic plate 12F disposed with the nonmagnetic plate 12C interposed between the permanent magnets 12M (12M-1, 12M-2, ..., 12M-12), The width of the laminated body of R is equal to or greater than the circumferential width, and in the relationship shown in FIG. 2A, θ1 ≧ θ2, and in the relationship shown in FIG. 2B, θ3 ≧ θ4.

  Furthermore, as shown in FIG. 10 (b) and FIG. 10 (c), the number of poles of the disk-shaped stator cores 16a, 16b is the same as that of each C-shaped stator core 13 (13-1, 13-2,. 14), (13-1 ', 13-2',..., 13-14 '), which is 14 as many as the number of poles, but here too, each disk-shaped rotary magnet 15a, 15b, 15c is constructed The ratio of the number of poles of each permanent magnet 12M (12M-1, 12M-2, ..., 12M-12) to 12 is set so as not to be an integer. Thereby, the rotor 120 of the rotary electric machine 100 can be rotated more smoothly.

  In this electric rotating machine 100, each permanent magnet 12M (12M-1, 12M-2, ..., 12M-12) constituting each disk-shaped rotary magnet 15a, 15b, 15c of the rotor 120 rotates each disk With a laminated body structure forming a magnetic path parallel to the rotating shaft 11 with the disc-shaped stator iron cores 16a and 16b disposed between the magnet bodies 15a and 15b and between the disc-shaped rotating magnet bodies 15b and 15c, respectively The front end of each permanent magnet 12M (12M-1, 12M-2, ..., 12M-12) disposed on the foremost surface (upper surface in FIG. 9) in the laminate, and the outermost surface (in FIG. 9) C-shaped stator core 13 (13-1, 13-2,..., 13-) between the back ends of the permanent magnets 12M (12M-1, 12M-2,..., 12M-12) disposed on the lower side of the 14), (13-1 ', 13-2', ..., 13-14 ') to close both ends of the magnetic path by magnetically connecting them, and the C-shaped stator core 13 (13-1, 13-2, ..., 13-14), (13-1', 13-2 ', ..., 13-14') and the number of poles of each of the disk-shaped stator cores 16a, 16b are wound with coils 14, 14a, 14b, 17a, 17b, respectively, and these coils 14 14a, 14b, 17a and 17b, for example, by connecting them in series and supplying a pulse current to suppress the pulsation torque acting on the rotor 120, the permanent magnets 12M (12M-1, 12M-2 , 12M-3,..., 12M-12) are formed of multistage annular structures (disk-shaped rotating magnets 15a, 15b, 15c) in the extending direction of the rotating shaft 11, and the performance of magnetic force generation is improved Of the pulsating torque It is possible to minimized the effect on the rotation of the child 120, results around the magnetic path as a wound coils 14, 14a, 14b, 17a, it becomes possible to obtain efficiently electromotive force e from 17b.

  That is, in the rotary electric machine 100 having the rotor 120 of the laminated body structure, for example, when the rotary shaft 11 is driven from the outside, the permanent magnets 12M (12M-1, 12M-2,) of the respective disk-shaped rotary magnet bodies 15a, 15b. ... 12M-12) → disc-shaped stator core 16a → permanent magnets 12M (12M-1, 12M-2, ... 12M-12) of each disc-shaped rotary magnet 15b, 15c → disc-shaped stator core 16b → each Permanent magnets 12M (12M-1, 12M-2, ... 12M-12) of the disk-shaped rotary magnet bodies 15a, 15c → C-shaped stator core 13 (13-1, 13-2, ..., 13-14), The magnetic flux passing through (13-1 ', 13-2', ..., 13-14 ') is interrupted, and an alternating current output can be efficiently obtained from the coils 14, 14a, 14b, 17a, 17b. In particular, if a pulse current is supplied to the coils 14, 14a, 14b, 17a, 17b wound around the magnetic path in the same manner as described in the technology of Patent Document 2, the pulsating torque acting on the rotor 120 And the rotor 120 rotates more smoothly.

  In the rotary electric machine 100 according to the embodiment, two disk-shaped stator cores 16a and 16b are interposed between the three disk-shaped rotating magnet bodies 15a, 15b and 15c that constitute the rotor 120. Although the laminated structure has been described in the extending direction of the rotating shaft 11, the rotor 120 has the rotating shaft with the one disk-shaped stator core 16a interposed between the two disk-shaped rotating magnet bodies 15a and 15b. A construction in which lamination is performed in the extension direction of 11 or a construction in which three or more disc-shaped stator cores are interposed between four or more disc-shaped rotary magnet bodies and lamination is performed in the extension direction of the rotation shaft 11 It is also possible. Further, in the rotary electric machine 100 according to the embodiment, as shown in FIG. 9 and FIG. 10B, the magnetization direction of the permanent magnets 12M (12M-1, 12M-2,..., 12M-12) In the case of setting in parallel with the above, the single-piece structure of the permanent magnets 12M (12M-1, 12M-2, ..., 12M-12) is assembled by joining a pair of permanent magnets and joined together. The magnetization direction is inclined to be inclined with respect to (in this case, however, in addition to being applicable to the case where the single structure is the same as described in the embodiment, the direction of twist is included), or Alternatively, it is effective to set the magnetization direction to be diagonally symmetrical with the extension direction of the rotary shaft 11 (also including the twisting direction here), and in such a case, the rotor 120 of the rotary electric machine 100 is Sum It can be rotated maintained's. Furthermore, in the rotary electric machine 100 according to the embodiment, the C-shaped stator iron cores 13 (13-1, 13-2, ..., 13-14), (13-1 ', 13-2', ..., 13-14 ' And coil-shaped stator cores 16a and 16b have been described with respect to the number of poles of each of the poles, while the coils 14, 14a, 14b, 17a and 17b are wound. Even if the coil is wound at at least one place in the part, the rotor 120 can be rotated on the basic function, and the influence of the pulsation torque on the rotation of the rotor 120 can be appropriately suppressed. It may be configured. In addition, in the rotary electric machine 100 according to the embodiment, although the application as a generator has been illustrated and described, the present invention can be similarly applied to a motor. Therefore, the rotary electric machine of the present invention is not limited to the form disclosed and described in the embodiments.

10, 100 Rotating electrical machine 11 Rotating shaft 12, 120 Rotor 12C Nonmagnetic plate 12F, 12R Magnetic plate 12M (12M-1, 12M-2, 12M-3, ..., 12M-24) Permanent magnet 13 (13- 1, 13-2, 13-3, ..., 13-21), (13-1 ', 13-2', 13-3 ', ..., 13-21') C-shaped stator iron cores 14, 14a, 14b , 14c, 14d, 14e, 17a, 17b Coils 15a, 15b, 15c Disc-shaped rotating magnets 16a, 16b Disc-shaped stator core

Claims (6)

A plurality of permanent magnet portions arranged concentrically with the rotation axis and in parallel with the rotation axis at equal intervals and alternating magnetization directions, and a nonmagnetic material interposed between the plurality of permanent magnet portions A rotor including a disc-shaped rotating body having a configuration in which a magnetic body is interposed ;
And a plurality of C-shaped stator cores arranged to surround the rotor at equal intervals in the circumferential direction of the rotation shaft so as to close both ends of the magnetic path of the rotor .
At least one location in a few minutes of the core portion poles before Symbol plurality of C-shaped stator core, the coil is configured by winding,
Each of the plurality of permanent magnet parts is configured by joining a pair of permanent magnets whose magnetization directions are inclined with respect to the rotation axis .   In the rotating electrical machine according to claim 1,
  Each of the plurality of permanent magnet sections is configured by joining a pair of permanent magnets whose respective magnetization directions are obliquely intersected with the extending direction of the rotation axis.   In the rotating electrical machine according to claim 1 or 2,
  The rotor is
  A plurality of the disc-shaped rotating bodies disposed along the extending direction of the rotating shaft;
  A disc-shaped stator core disposed between the disc-shaped rotating bodies adjacent to the extending direction of the rotating shaft with a gap in the extending direction of the rotating shaft between the disc-shaped rotating body and the disc-shaped rotating body Including and
  The plurality of C-shaped stator cores are:
  A first portion facing the disc-shaped rotating body disposed at one end of the extending direction of the rotating shaft, with a gap in the extending direction of the rotating shaft;
  A second portion facing the disc-like rotating body disposed at the other end of the extending direction of the rotating shaft with a gap in the extending direction of the rotating shaft;
  A rotary electric machine characterized in that it is formed in a C-shape by a connection portion connecting the first portion and the second portion. In the electric rotating machine according to any one of claims 1 to 3 ,
A rotating electrical machine characterized in that a pulse current is supplied to the coil to suppress a pulsating torque acting on the rotor. In the electric rotating machine according to any one of claims 1 to 4 ,
Circumferential width of the plurality of permanent magnet portions constituting the front Kien plate-shaped rotating body, the circumferential direction of the magnetic body disposed across the non-magnetic material is interposed between the plurality of permanent magnet portions A rotating electrical machine characterized by having a width or more. In the rotating electrical machine according to any one of claims 1 to 5 ,
The number of poles of the plurality of C-shaped stator iron core with a same number, the rotating electrical machine the ratio of the number of poles of the plurality of permanent magnet portions constituting the front Kien shaped rotary member is characterized by not an integer .