JP2006187080A - Magnetic rotator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic rotator which can get high electromagnetic torque, being fit for high-speed revolution. <P>SOLUTION: This electromagnetic rotator 1 possesses a rotor 2 where a plate-shaped permanent magnet 6 with magnetic poles made at its obverse and reverse is arranged and an electromagnet 7 which is fixed to a frame 3, corresponding to the permanent magnet 6, and makes magnetic force work upon the permanent magnet 6 thereby rotating the rotor 2. This gives the above rotor 2 the torque by magnetic force by breaking the current to the above electromagnet 7 in the rotational angle region to generate sword-like torque (Ta) and applying a current to the above electromagnet 7 in the rotational angle region to generate hill-like torque (Tb) other than the sword-like torque(Ta) and hill-like torque (Tc) in the relation between the rotating torque generated by magnetic force and the rotational angle of the rotor 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a magnetic rotating device that rotates a rotating body with a magnetic force, and more particularly to a magnetic rotating device that uses repulsive force and attractive force between a permanent magnet and an electromagnet.

  Conventionally, a magnetic rotating device including a rotating body in which a permanent magnet is arranged in a circumferential region of a rotatable rotating shaft, and an electromagnet that generates a magnetic field repelling a magnetic field generated by the permanent magnet of the rotating body. Has been invented (see Patent Document 1). According to such a magnetic rotating device, torque for rotating the rotating body is generated by the repulsive force between the permanent magnet and the electromagnet, and the rotating body is rotated.

Japanese Patent No. 2968918

  In the above-described conventional magnetic rotating device, while the permanent magnet of the rotating body rotates and approaches the electromagnet, the N and S poles of the permanent magnet are interposed between the permanent magnet and the electromagnet. A repulsive force and an attractive force are generated due to the relationship between the magnetic pole and the electromagnet. In the magnetic rotating device, only the repulsive force between the permanent magnet and the electromagnet is used, and the urging force is applied to the rotating body at a predetermined position. Therefore, current is generated and passed through the electromagnet only during a predetermined positional relationship in which a repulsive force is generated between the permanent magnet and the electromagnet while the rotating body is within the predetermined rotation range. There is a need.

  However, in the relationship between the current flowing through the electromagnet and the time, as shown in FIG. 30, there is a current rise time T1 and a decay time T2, so if a current with a narrow pulse width is passed, the rotating body If the rotation speed is high, it becomes difficult to control the flow of a constant current, and the conventional magnetic rotation device is not suitable for high-speed rotation.

  The present invention has been made in view of these points, and an object thereof is to provide a magnetic rotating device that is suitable for high-speed rotation and can obtain high electromagnetic torque.

  In order to achieve the above object, a magnetic rotating device according to claim 1 includes a rotor in which plate-like permanent magnets having magnetic poles formed on the front and back surfaces are disposed, and a stator corresponding to the permanent magnet. And an electromagnet that rotates a rotor by applying a magnetic force to a permanent magnet. In the relationship between the rotational torque generated by the magnetic force and the rotational angle of the rotor, a sword-shaped torque ( The current to the electromagnet is cut off in the rotation angle region where Ta) is generated, and the electromagnet is transferred to the electromagnet in the rotation angle region where Oka torque (Tb) and Oka torque (Tc) other than the sword-shaped torque (Ta) are generated. It is characterized in that a rotational force by a magnetic force is applied to the rotor by energizing.

  The magnetic rotating device according to claim 2 is the magnetic rotating device according to claim 1, wherein the permanent magnet includes a straight line (L1) connecting the center of the rotor to the center of gravity of the permanent magnet and a straight line in the magnetic pole direction of the permanent magnet. It is characterized in that the angle (φ) at which (L2) intersects is positioned to be about 30 ° to 60 ° when viewed from the center direction of the rotor.

  The magnetic rotating device according to claim 3 is the magnetic rotating device according to claim 1 or 2, wherein the electromagnet has an angle at which a straight line connecting the center of the rotor to the center of gravity of the electromagnet and a magnetic flux central axis of the electromagnet intersect. When viewed from the center direction of the rotor, the rotor is positioned so as to be larger than 0 ° and not larger than 20 °.

  A magnetic rotating device according to a fourth aspect is the magnetic rotating device according to any one of the first to third aspects, wherein a plurality of the permanent magnets are disposed on the rotor and the two permanent magnets of the rotor are disposed. A columnar ferromagnet is provided, and reluctance electromagnetic torque (Tr) is generated by the attractive force between the columnar ferromagnet and the electromagnet while the electromagnet is energized.

  The magnetic rotating device according to claim 5 is the magnetic rotating device according to any one of claims 1 to 3, wherein a plurality of the permanent magnets are disposed on the rotor and the two permanent magnets of the rotor are disposed. A reluctance electromagnetic torque (Tr) is generated by the attractive force between the columnar ferromagnet and the electromagnet while the electromagnet is energized with a columnar ferromagnet movable on an arc having a center at the center. It is characterized by that.

  A magnetic rotating device according to a sixth aspect is the magnetic rotating device according to any one of the first to third aspects, wherein a plurality of the permanent magnets are disposed on the rotor and between the two permanent magnets of the rotor. A reluctance electromagnetic torque (Tr) is generated by an attractive force between the columnar ferromagnet and the electromagnet while the electromagnet is energized. .

  The magnetic rotating device according to claim 7, wherein a plurality of the permanent magnets are arranged on the rotor, and the rotor is centered on the rotor center in the magnetic rotating device according to any one of claims 1 to 3. A reluctance electromagnetic torque (Tr) due to an attractive force between the columnar ferromagnet and the electromagnet while the columnar ferromagnet is movable on the arc between the two permanent magnets and energizing the electromagnet It is characterized by having generated.

  According to the magnetic rotating device according to the present invention, the current (DC current) to the electromagnet is interrupted in the rotation angle region that generates the sword-shaped torque (Ta), and the oka-shaped torque (Tb) other than the sword-shaped torque (Ta). ) And oka-like torque (Tc) in a rotational angle region that generates unidirectional current to the electromagnet, thereby giving the rotor a rotational force by magnetic force, so that the pulse width of the current flowing through the electromagnet is widened, The current can be easily controlled even at high speed. Therefore, high speed rotation of the magnetic rotating device can be realized.

  The electromagnet is positioned so that the angle at which the straight line connecting the center of the electromagnet to the center of gravity of the electromagnet and the magnetic flux central axis of the electromagnet is greater than 0 ° and not more than 20 ° when viewed from the center of the rotor. Therefore, there is an advantage that the average electromagnetic torque increases as compared with the case where the intersecting angle is set to 0 °.

  Further, since the rotor is provided with a columnar ferromagnet and the reluctance electromagnetic torque (Tr) is generated by the attractive force between the columnar ferromagnet and the electromagnet, the average electromagnetic torque is increased by the reluctance electromagnetic torque (Tr) and the electromagnetic torque. Increase. Thereby, further high-speed rotation of a magnetic rotating apparatus is realizable.

  Hereinafter, a magnetic rotating device according to a first embodiment of the present invention will be described in detail with reference to the drawings as appropriate. As shown in FIGS. 1 and 2, a magnetic rotating device 1 according to the present embodiment includes a rotating body (rotor) 2 that rotates by magnetic force, and a frame (stator) 3 that supports the rotating body 2. Consists of.

  In the rotating body 2, two disks 5 and one disk 51 are fixed to a shaft 4 serving as a rotation axis at a predetermined interval via a spacer 40, and 4 on the lower surface of each disk 5 at a constant interval in the circumferential direction. A number of permanent magnets 6 are provided. On the other hand, electromagnets 7 are fixed to the frame 3 at four locations corresponding to the permanent magnets 6.

  The permanent magnet 6 has a plate shape with magnetic poles formed on the front and back surfaces, and is specifically a rare earth magnet such as neodymium. Thus, by using the permanent magnet 6 having the N pole and the S pole formed on the front and back surfaces, each magnetic pole surface becomes wider, and the rotational torque can be improved.

  As shown in FIG. 1, the permanent magnet 6 is fixed by being embedded in the disk 5 by about several millimeters. As shown in FIG. 2, the permanent magnet 6 is equally spaced in the circumferential direction with respect to one disk 5. As shown, four are fixed. In other words, the permanent magnets 6 are arranged at 90 ° in the circumferential direction on the peripheral edge of the disk 5. The fixing method of the permanent magnet 6 is not particularly limited, and may be fixed to the disk 5 using a metal fitting or the like as appropriate. Further, the number of permanent magnets 6 is not particularly limited, but considering the balance of the rotating body 2, a plurality of permanent magnets 6 may be arranged at regular intervals in the circumferential direction as in this embodiment. preferable.

  Each permanent magnet 6 has a straight line L1 connecting the center O (rotor center) of the disk 5 (rotor 2) to the center of gravity 6a of the permanent magnet 6 and the magnetic pole direction of the permanent magnet 6, that is, a method on the front and back surfaces. The angle φ at which the straight line L2 intersects with the line is positioned so as to be about 30 ° to 60 ° when viewed from the center O direction of the disk 5. Either one of the N pole and S pole of the permanent magnet 6 faces the outside of the disk 5, and the polarity of the electromagnet 7 provided with a predetermined magnetic gap is opposed to the permanent magnet 6. It is the same polarity as the outer magnetic pole of the magnet 6.

  Similarly, four permanent magnets 6 with opposite poles facing outward are fixed to another disk 5, and each of the four permanent magnets 6 is fixed and the two disks 5 are connected to each other. The permanent magnets 6 are superposed via spacers 40 so as to be in the same position in the circumferential direction. That is, a total of eight permanent magnets 6 are provided in the magnetic rotating device 1. In addition, a total of three discs, two discs 5 and one disc 51, are also superimposed via the spacers 40.

  Further, the sensor detection board 8 is fixed to the disk 51 so as to be coaxial. The sensor detection board 8 is a transparent acrylic board having a slightly larger diameter than the disk 5, and a position detection sensor 9 detects the part by sticking a tape or the like to a predetermined part of the part protruding from the periphery of the disk 5. It is like that.

  The shaft 4 passes through the center of each of the disks 5 and 51, and the shaft 4, the disks 5 and 51, the permanent magnet 6, and the sensor detection board 8 are fixed so as to rotate integrally as the rotating body 2. It has become. As shown in FIG. 1, the film 10 is attached to the peripheral portion of the rotating body 2 so as to extend between the peripheral portions of the disks 5 and 51. By sealing the periphery of the rotating body 2 with the film 10, the air inside the rotating body 2 sealed with the film 10 rotates together with the rotating body 2 when the rotating body 2 rotates. Is less subject to air resistance. Thereby, the air resistance of the rotary body 2 can be reduced and the rotation efficiency of the magnetic rotating device 1 can be improved. The film 10 is a material that does not affect the action of the magnetic force between the permanent magnet 6 and the electromagnet 7 and is preferably thin. For example, a synthetic resin film or the like can be used.

  As shown in FIG. 1, the electromagnet 7 is formed by winding a coil 71 around a U-shaped iron core 70, and a magnetic pole is formed at each end of the iron core 70 when a current flows through the coil 71. Thereby, a magnetic force is made to act on the permanent magnet 6, and the rotary body 2 is rotated. As shown in the figure, the electromagnet 7 is arranged with a predetermined magnetic gap length so that each magnetic pole thereof corresponds to the permanent magnet 6 formed in two stages between the respective disks 5. The permanent magnet 6 of the electromagnet 7 faces the same pole as the magnetic pole of the electromagnet 7, that is, the permanent magnet 6 corresponding to the N pole of the electromagnet 7 is fixed to the disk 5 with the N pole facing outward. The permanent magnet 6 corresponding to the S pole of 7 is fixed to the disk 5 with the S pole facing outward. As shown in FIG. 2, four such electromagnets 7 are fixed to the frame 3 at positions different by 90 ° in the circumferential direction in correspondence with the arrangement of the permanent magnets 6 of the rotating body 2. In this way, a pair of permanent magnets 6 fixed to the rotating body 2 has a two-stage configuration, and the electromagnet 7 has a U shape so as to correspond to the two-stage permanent magnet 6, and magnetic poles generated from both poles of the electromagnet 7. By using both as the magnetic force for rotating the rotating body 2, the energy conversion efficiency from electric power to power of the magnetic rotating device 1 is improved.

  Further, the electromagnet 7 has an angle at which a straight line (not shown) connecting the center O of the electromagnet 7 and the center O of the electromagnet 7 (not shown) intersects with the center O of the disk 5 (rotary body 2). When viewed from the direction, it is positioned so as to be greater than 0 ° and less than or equal to 20 °, that is, the angle formed by the magnetic flux central axis of the electromagnet and the radial axis is not less than 160 ° and less than 180 °. Thereby, there is an advantage that the average electromagnetic torque is increased as compared with the case where the angle is set to 0 °. Note that changing the fixed angle of the permanent magnet 6 is difficult because the magnetic rotating device 1 needs to be disassembled, but changing the fixed angle of the electromagnet 7 can be easily performed. In the drawing, the angle is substantially 0 °, but the electromagnet 7 is actually fixed so that the angle is greater than 0 ° and not more than 20 °.

  The frame 3 supports the rotating body 2 and fixes the electromagnet 7 and the position detection sensor 9. As shown in FIG. 1, two frame plates 30 face each other at a predetermined interval and are connected to each other. Has been. The rotating body 2 is rotatably provided on the frame 3 by supporting the shaft 4 between the opposing frame plates 30. Accordingly, the two frame plates 30 are sufficiently larger than the outer diameter of the rotating body 2. Although not shown in the drawing, each frame plate 30 that supports the shaft 4 is appropriately provided with a bearing.

  The frame 3 is provided with a position detection sensor 9 corresponding to the sensor detection board 8. Any known position detection sensor 9 can be used as long as it can detect a predetermined portion of the sensor detection panel 8 that rotates together with the rotating body 2. Further, the position detection sensor 9 is connected to a circuit 11 connected to each electromagnet 7 in order to apply a current to the electromagnet 7, and gives the circuit 11 a timing to apply a current to the electromagnet 7. Although the circuit 11 will not be described in detail, the energy of the coil 71 of the electromagnet 7 is not consumed by resistance but is preferably a type that regenerates to the power source, and is generally used in, for example, an SRM (switched reluctance motor). A circuit with two self-extinguishing elements can be used.

  Hereinafter, an operation of rotating the rotating body 2 by applying an urging force by a magnetic force in the magnetic rotating device 1 will be described. First, as shown in FIGS. 3 and 4, a rod-like permanent having magnetic poles formed at both ends. Consider a conventional magnetic rotating device using a magnet 90 in which the rod-shaped permanent magnet 90 is arranged such that the angle φ formed by the magnetic pole direction with respect to the radial direction of the rotating body is 60 °. A circle including the permanent magnet 90 indicates a rotating body. FIG. 3 shows a stable equilibrium state, and FIG. 4 shows an unstable equilibrium state. In both cases, the attractive force and the repulsive force of the permanent magnet 90 and the electromagnet 91 are in a balanced state. However, in a stable equilibrium state, the rotating body rotates in any direction due to the magnetic force between the permanent magnet 90 and the electromagnet 91. A force in the direction opposite to the rotational direction is applied to return to the stable equilibrium state again. On the other hand, in the unstable equilibrium state, if the rotating body rotates in any direction, a force in the rotation direction is applied by the magnetic force of the permanent magnet 90 and the electromagnet 91, and the unstable equilibrium state does not return again.

  FIG. 5 is a θ-Te characteristic diagram showing the electromagnetic torque Te with respect to the rotation angle θ in the conventional magnetic rotating device. The electromagnetic torque Te is due to the two-stage pair of permanent magnets 90 and one electromagnet 91 having a constant current, and θ is a rotation angle measured counterclockwise from the central axis of the electromagnet 91. As shown in the figure, there are an operating point P1 (see FIG. 3) in a stable equilibrium state and an operating point P2 (see FIG. 4) in an unstable equilibrium state. A region having a relatively large peak is generated at the center of the torque curve near θ = 0 °. The torque in this region where the attractive force and the repulsive force act on the peak is referred to as a sword-shaped torque Ta. . On the other hand, regions having a relatively wide peak width are generated on both sides of the sword-shaped torque Ta, and the torques in these regions are referred to as oka-like (repulsive force) torque Tb and oka-like (suction force) torque Tc, respectively. And

  In the conventional magnetic rotating device, the repulsive force and attractive force of the sword-shaped torque Ta are used. When the sword torque Ta is used, it is necessary to supply the electromagnet 91 with a current having a narrow pulse width between θ = −10 ° and 20 °. When supplying a current having such a pulse width, it is difficult to cope with high-speed rotation in consideration of the rise time and decay time of the current.

Next, the rotation of the magnetic rotating device 1 will be described.
FIG. 6 is a θ-Te characteristic diagram of the magnetic rotating device 1. θ is the rotation angle of the rotating body 2, Te is the electromagnetic torque, the + θ direction indicates the counterclockwise direction of the rotating body 2, and the −θ direction indicates the clockwise direction of the rotating body 2. Here, when the electromagnetic torque Te is integrated at 0 ° to 360 °, the value becomes zero. That is, the sum of the electromagnetic torque Te is zero. As shown in the figure, a negative electromagnetic torque Te is generated due to the sword-shaped torque Ta. This is because each magnetic pole of the permanent magnet 6 acts as a repulsive force and an attractive force with respect to the magnetic pole of the electromagnet 7, and in total, clockwise. This is because the torque in the direction -θ is generated. In addition, since the permanent magnet 6 is also present at + 90 ° and −90 ° apart from the two-stage pair of permanent magnets 6, the Oka torque Tb and the Oka torque Tc in FIG. The sword torque Ta does not change. When θ = 0 °, the permanent magnet 6 and the electromagnet 7 act to generate torque in the + θ direction. Further, a stable equilibrium point (operation point in a stable equilibrium state) P1 occurs at θ = −25 ° and 40 °, and an unstable equilibrium point (operation point in an unstable equilibrium state) P2 has θ = −1 ° and −60 °. It occurs in. In addition, the rotation angle which the stable equilibrium point P1 and the unstable equilibrium point P2 generate | occur | produce changes with the positional relationship of the permanent magnet 6 and the electromagnet 7, for example, a magnetic gap length.

  The magnetic rotating device 1 uses the oka-like torque Tb and the oka-like torque Tc without using the sword-like torque Ta. As a result, a current having a wide pulse width is caused to flow through the electromagnet 7, so that the current can be easily controlled even at high speed rotation. Therefore, as shown in the figure, the current is controlled to flow through the electromagnet 7 at θ = −60 ° to −25 ° and θ = −1 ° to 40 °.

  Thus, if both the Oka torque Tb and the Oka torque Tc are used, the width of θ at which the pulse current should be generated becomes wider, and the electromagnetic torque also becomes larger. Such current control is performed by attaching a tape or the like so that the position detection sensor 9 can detect within a predetermined region of the sensor detection board 8, that is, a region of 66 ° width of θ = −1 ° to 65 °. Can be realized.

  As described above, according to the magnetic rotating device 1 according to the present embodiment, the rotational angle that generates the sword-shaped torque Ta in the relationship between the rotational torque (electromagnetic torque Te) generated by the magnetic force and the rotational angle (rotational angle θ). Region of rotation angle θ (rotation angle region) in which current (DC current) to electromagnet 7 is interrupted in the region of θ (rotation angle region) and oka-like torque Tb and oka-like torque Tc other than sword-like torque Ta are generated. Since the rotational force by the magnetic force is applied to the rotating body 2 by energizing the electromagnet 7 in one direction, the pulse width of the current flowing through the electromagnet 7 is widened, and the current can be easily controlled even at high speed rotation. . Therefore, high speed rotation of the magnetic rotating device 1 can be realized.

  Next, a magnetic rotating device according to a second embodiment of the present invention will be described. In addition to the configuration of the magnetic rotating device 1 according to the first embodiment described with reference to FIGS. 1 and 2, the magnetic rotating device 1 according to the present embodiment includes a rotating body 2 as shown in FIG. A columnar ferromagnetic body 121 is provided between the two permanent magnets 6. Specifically, an intermediate portion between adjacent permanent magnets 6, that is, a straight line L 1 connecting the center of gravity 6 a of the permanent magnet 6 from the center O of the disk 5, and the center of gravity of the columnar ferromagnetic body 121 A (121) from the center O of the disk 5. The angle α formed by the straight line L4 connecting 121a is provided to be about 45 ° when viewed from the direction of the center of gravity 6a of the permanent magnet 6A (6). A total of eight columnar ferromagnets 121 are provided on each disk 5, and a reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnet 121 and the electromagnet 7.

  7 shows a state where the rotational angle θ of the rotating body 2 is 0 °, FIG. 8 shows a state where the rotational angle θ of the rotating body 2 is 20 °, and FIG. 9 shows a state where the rotational angle θ of the rotating body 2 is 45 °. FIG. 10 shows changes in the reluctance electromagnetic torque Tr with respect to these state changes. In the state shown in FIG. 7, that is, θ = 0 °, energization of the electromagnet 7 is started. Since the structure of the columnar ferromagnet 121 is simple and its mechanical strength is large, the columnar ferromagnet 121A (121) receives an attractive force from the electromagnet 7A (7) and an attractive force from the electromagnet 7B (7). . Here, since the both attractive forces are the same in magnitude and in opposite directions, the magnitude of the reluctance electromagnetic torque Tr is zero. This also applies to the other columnar ferromagnets 121. Therefore, at θ = 0 °, the reluctance electromagnetic torque Tr in the magnetic rotating device 1 is zero.

  FIG. 8 is a diagram showing the state of the disk 5, the permanent magnet 6 and the columnar ferromagnetic body 121 disposed in the disk 5 in a state where energization is started and θ = 20 °. The columnar ferromagnetic body 121A receives the attractive force from the electromagnet 7A and the attractive force from the electromagnet 7B. At this time, since the columnar ferromagnetic body 121A is positioned closer to the electromagnet 7A, the attractive force from the electromagnet 7A is larger, and the reluctance electromagnetic torque Tr has a positive value (+ θ direction).

  FIG. 9 is a diagram showing the state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 121 disposed on the disk 5 in a state where energization is started and θ = 45 °. Here, control is performed so that the current to the electromagnet 7 becomes 0 in the state shown in the drawing, that is, θ = 45 °. On the other hand, when the current is not set to 0, only the attractive force between the columnar ferromagnet 121A and the electromagnet 7A becomes extremely large, but this attractive force is in the radial direction. Therefore, the reluctance electromagnetic torque Tr becomes 0 regardless of the presence or absence of current to the electromagnet 7.

  FIG. 10 is a characteristic diagram of the reluctance electromagnetic torque Tr generated by the action of the columnar ferromagnetic body 121 and the electromagnet 7 and the rotation angle θ, and is a θ-Tr characteristic diagram when a constant current flows through the electromagnet 7. The average value of the reluctance electromagnetic torque Tr from 0 ° to 90 ° is zero. As described above, the reluctance electromagnetic torque Tr is 0 when θ is 0 ° and 45 °. Further, there are a method of setting the current to the electromagnet 7 to 0 when θ = 45 °, and a method of setting the current to the electromagnet 7 to 0 when θ becomes larger than 45 °. Recognize. In the latter case, the reluctance electromagnetic torque Tr is somewhat wasted, but since the energization period becomes longer, there is an advantage that other electromagnetic torque components become larger.

  As described above, according to the magnetic rotating device 1 according to the second embodiment, the columnar ferromagnetic body 121 is provided between the permanent magnets 6 while the electromagnet 7 is energized. Since the reluctance electromagnetic torque Tr due to the attractive force with the electromagnet 7 is generated, the average electromagnetic torque increases due to the reluctance electromagnetic torque Tr (see FIG. 10) and the electromagnetic torque Te (see FIG. 6). Thereby, further high-speed rotation of the magnetic rotating apparatus 1 can be realized.

  Next, a magnetic rotating device according to a third embodiment of the present invention will be described. In addition to the configuration of the magnetic rotating device 1 according to the first embodiment described with reference to FIGS. 1 and 2, the magnetic rotating device 1 according to the present embodiment includes a rotating body 2 as shown in FIG. A columnar ferromagnet 131 that can move in a circular arc shape having a center between the two permanent magnets 6 is provided. Specifically, on a predetermined arc centering on an intermediate portion between adjacent permanent magnets 6, that is, a straight line L 1 connecting the center O of the permanent magnet 6 to the center of gravity 6 a of the permanent magnet 6 and a columnar strength from the center O of the disk 5. The angle β formed by the straight line L4 connecting the center of gravity 131a of the magnetic body 131A (131) is movable on an arc of about 25 ° to 44 ° when viewed from the direction of the center of gravity 6a of the permanent magnet 6A (6). Is provided. A total of eight columnar ferromagnets 131 are provided on each disk 5, and a reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnet 131 and the electromagnet 7.

  The columnar ferromagnetic body 131 </ b> A (131) is supported by the arm 16, and the arm 16 is pivotally supported by the bearing 15, so that it can move on a predetermined arc. The bearing 15 has an angle (β in FIG. 11) between an intermediate portion of adjacent permanent magnets 6, that is, a straight line L 1 and a straight line (straight line L 4 in FIG. 11) connecting the bearing 15 and the center O of the disk 5. It is provided at a position of 44 °. In place of the bearing 15, a cross roller bearing may be used. The movable range of the arm 16 is limited by the stopper 141 and the stopper 142 so that the minimum value of β is 25 ° and the maximum value is 44 °. Therefore, the reluctance electromagnetic torque Tr ≧ 0 at θ = 0 ° to 44 °. Therefore, the electromagnet 7 is basically energized at θ = 0 ° to 44 °. In addition, there is also a method of energizing to a range of θ> 44 ° where the average value of the reluctance electromagnetic torque Tr is positive.

  For example, when β exceeds 45 ° and the current to the electromagnet 7 becomes 0, the columnar ferromagnetic body 131A has a stronger attracting force of the permanent magnet 6B than the attracting force of the permanent magnet 6A. Since it is attracted to 6B, it is inconvenient. Therefore, the maximum value of β is set to 44 °. As shown in the figure, the position of the stopper 141 may be such that the columnar ferromagnetic body 131A faces the electromagnet 7A at θ = 0 °, or the columnar ferromagnetic body 131A approaches the circumference. It may be moved to. Further, the minimum value and the maximum value of β change depending on the positions of the stoppers 141 and 142, the position of the bearing 15, and the length of the arm 16, and the θ-Tr characteristic can be changed.

  11 described above is a state in which the rotation angle θ of the rotating body 2 is 0 °, FIG. 12 is a state in which the rotation angle θ of the rotating body 2 is 20 °, and FIG. 13 is a state in which the rotation angle θ of the rotating body 2 is 43 °. FIG. 14 shows a state where the rotation angle θ of the rotating body 2 is 44 °, and FIG. 15 shows a change in the reluctance electromagnetic torque Tr with respect to these state changes. When energization of the electromagnet 7 is started in the state shown in FIG. 11, that is, θ = 0 °, the columnar ferromagnetic body 131A receives the attractive force from the electromagnet 7A and the attractive force from the electromagnet 7B. Here, since the attractive force from the electromagnet 7A is larger than the attractive force, the reluctance electromagnetic torque Tr is a positive value (+ θ direction), and the torque is large. At this time, the arm 16 is in contact with the stopper 141, so that the columnar ferromagnetic body 131A does not rotate counterclockwise. The attractive force between the columnar ferromagnetic body 131A and the permanent magnet 6A is large, but since the columnar ferromagnetic body 131A and the permanent magnet 6A are both on the rotating body 2, no torque is generated.

  FIG. 12 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 20 °. Also in this case, the reluctance electromagnetic torque Tr is positive (+ θ direction) because the attractive force from the electromagnet 7A is larger than the attractive force received from the electromagnet 7A and the attractive force received from the electromagnet 7B by the columnar ferromagnetic body 131A. Value.

  FIG. 13 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 43 °. At this time, the attractive force from the electromagnet 7A to the columnar ferromagnet 131A is extremely large, but as shown, the direction is substantially radial. Therefore, the reluctance electromagnetic torque Tr becomes a small positive value.

  FIG. 14 is a diagram showing the state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 44 °. Control is performed so that the current to the electromagnet 7 becomes 0 in the state shown in the drawing, that is, θ = 44 °. At this time, if the electromagnet 7 is energized, the columnar ferromagnetic member 131A moves clockwise from the state shown in the figure by the attractive force from the electromagnet 7A, and the arm 16 comes into contact with the stopper 142. . Although the attractive force between the columnar ferromagnet 131A and the electromagnet 7A is large, the direction is a radial direction as can be seen from the figure. Therefore, the reluctance electromagnetic torque Tr is zero. When θ = 44 ° and the current to the electromagnet 7 is 0, the columnar ferromagnetic body 131A receives the attractive force from the permanent magnet 6B and the attractive force from the permanent magnet 6A. In this case, since the attraction force from the permanent magnet 6A is large, the arm 16 is brought into contact with the stopper 141 as shown in the drawing by being attracted to the permanent magnet 6A. For this reason, at the time of re-inflow of current (θ = 90 °), the state is the same as one cycle before (θ = 0 °).

  For example, even if the current to the electromagnet 7 becomes 0 in a state where θ = 44 ° is exceeded, the columnar ferromagnetic body 131A is attracted to the permanent magnet 6A and becomes in the same state as one cycle before, so there is a problem. Does not occur. However, when θ exceeds 44 °, the reluctance electromagnetic torque Tr becomes a negative value (−θ direction), and the current is controlled to 0 here. There is also a method in which the electromagnet 7 is energized within a wider range of θ where the reluctance electromagnetic torque average value does not become negative.

  FIG. 15 is a characteristic diagram of the reluctance electromagnetic torque Tr generated by the action of the columnar ferromagnet 131 and the electromagnet 7 and the rotation angle θ, and is a θ-Tr characteristic diagram when a constant current flows through the electromagnet 7. As described above, the reluctance electromagnetic torque Tr has a positive (+ θ direction) value at θ = 0 °, and is 0 at θ = 44 °. Further, when 44 ° <θ <82 °, the reluctance electromagnetic torque Tr takes a negative value (−θ direction), and when θ = 82 °, the reluctance electromagnetic torque Tr turns to a positive value (+ θ direction). This is because the state in which the arm 16 of the columnar ferromagnetic body 131A is in contact with the stopper 142 is changed to the state in which it is in contact with the stopper 141. The average value of the reluctance electromagnetic torque Tr from 0 ° to 90 ° is zero. This θ-Tr characteristic diagram clearly shows the advantage of setting the current to the electromagnet 7 to zero at θ = 44 °.

  As described above, according to the magnetic rotating device 1 according to the present embodiment, the columnar ferromagnetic body 131 that can move on the arc having the center is provided between the permanent magnets 6 of the respective disks 5 of the rotating body 2, and the electromagnet 7, the reluctance electromagnetic torque Tr (see FIG. 15) and the electromagnetic torque Te (see FIG. 6) are generated because the reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnet 131 and the electromagnet 7. As a result, the average electromagnetic torque increases. Thereby, further high-speed rotation of the magnetic rotating apparatus 1 can be realized.

  Next, a magnetic rotating device according to a modification of the third embodiment of the present invention will be described. As shown in FIG. 16, in the magnetic rotating device 1 according to the present embodiment, a columnar ferromagnetic body 131 that can move on a predetermined arc is provided on a disk 5. Specifically, the angle β formed by the straight line L1 connecting the center O of the disk 5 to the center of gravity 6a of the permanent magnet 6 and the straight line L4 connecting the center of gravity 131a of the columnar ferromagnet 131 from the center O of the disk 5 has an angle β. When viewed from the direction of the center of gravity 6a, it is provided so as to be movable on an arc of about 38 ° to 44 °. A total of eight columnar ferromagnets 131 are provided on each disk 5, and a reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnet 131 and the electromagnet 7.

  The columnar ferromagnetic body 131A is supported by the arm 16, and the arm 16 is pivotally supported by the bearing 15, so that it can move on a predetermined arc. The bearing 15 is provided at a position where an angle formed by the straight line L1 and a straight line (not shown) connecting the bearing 15 and the center O of the disk 5 is about 35 °. In place of the bearing 15, a cross roller bearing may be used. The movable range of the arm 16 is limited by the stopper 141 and the stopper 142 so that the minimum value of β is 38 ° and the maximum value is 44 °. Therefore, the reluctance electromagnetic torque Tr ≧ 0 at θ = 0 ° to 38 °. Therefore, a method of setting the current to the electromagnet 7 to 0 at θ = 38 ° is also conceivable. However, in this method, since the energization period is short, the values of other electromagnetic torque components are reduced.

  When θ> 38 °, the reluctance electromagnetic torque Tr becomes a negative value (−θ direction), but the columnar ferromagnetic body 131A moves and the direction of the attractive force from the electromagnet 7A is close to the radial direction. The torque Tr is a small value. In addition, θ = 54 ° and β = 44 °. In this state, the columnar ferromagnetic body 131A and the electromagnet 7A are separated from each other, and the reluctance electromagnetic torque Tr becomes a small value. Therefore, a method of energizing the electromagnet 7 at 0 ° <θ <54 ° can also be employed.

  As shown in the figure, the stopper 141 serves to fix the position of the columnar ferromagnetic body 131A (131) at β = 38 ° at θ = 0 ° to 38 °, and the stopper 142 sets the maximum value of β to 44. It works as a °. The θ-Tr characteristic can be changed according to the positions of the stoppers 141 and 142, the bearing 15, and the length of the arm 16.

  16 shows a state where the rotational angle θ of the rotating body 2 is 0 °, FIG. 17 shows a state where the rotational angle θ of the rotating body 2 is 20 °, and FIG. 18 shows a state where the rotational angle θ of the rotating body 2 is 50 °. 19 shows a state in which the rotational angle θ of the rotating body 2 is 54 °, FIG. 20 shows a state in which the rotational angle θ of the rotating body 2 is 70 °, and FIG. 21 shows a change in the reluctance electromagnetic torque Tr with respect to these state changes. Is shown. When the energization of the electromagnet 7 is started in the state shown in FIG. 16, that is, θ = 0 °, the columnar ferromagnetic body 131A receives the attractive force from the electromagnet 7A and the attractive force from the electromagnet 7B. Here, since the attractive force from the electromagnet 7A is larger than the attractive force, the reluctance electromagnetic torque Tr is a positive value (+ θ direction), and the torque is large.

  FIG. 17 is a diagram showing the state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 when energization is started and θ = 20 °. Also in this case, the reluctance electromagnetic torque Tr is positive (+ θ direction) because the attractive force from the electromagnet 7A is larger than the attractive force received from the electromagnet 7A and the attractive force received from the electromagnet 7B by the columnar ferromagnetic body 131A. Large value. In this case, β is the minimum value of 38 °.

  FIG. 18 is a diagram showing the state of the disk 5, the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 50 °. At this time, the attractive force from the electromagnet 7A to the columnar ferromagnet 131A is slightly large, and the direction is slightly radial as shown in the figure. Therefore, the reluctance electromagnetic torque Tr is a medium value in the negative (−θ direction). In this case, β is 42 °.

  FIG. 19 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 54 °. As shown in the drawing, β has a maximum value of 44 °, and the arm 16 is in contact with the stopper 142. At this time, the reluctance electromagnetic torque Tr has a medium value of negative (−θ direction) which is substantially the same as the reluctance electromagnetic torque Tr at θ = 50 ° shown in FIG.

  FIG. 20 is a diagram showing the state of the disk 5, the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 in a state where energization is started and θ = 70 °. As shown in the figure, as in the case of θ = 54 ° shown in FIG. 19, β has a maximum value of 44 °, and the arm 16 is in contact with the stopper 142. At this time, the reluctance electromagnetic torque Tr has a small negative value (−θ direction). For example, if the current to the electromagnet 7 is set to 0 at θ = 71 °, the columnar ferromagnetic body 131A is attracted to the permanent magnet 6A and one cycle before (θ = 90 °) (θ = 0 °).

  FIG. 21 is a characteristic diagram of the reluctance electromagnetic torque Tr generated by the action of the columnar ferromagnet 131 and the electromagnet 7 and the rotation angle θ. However, it is a θ-Tr characteristic diagram when a constant current flows through the electromagnet 7. As described above, the reluctance electromagnetic torque Tr has a positive (+ θ direction) value at θ = 0 °, and is 0 at θ = 38 °. Further, when 38 ° <θ <83 °, the reluctance electromagnetic torque Tr takes a negative value (−θ direction). The average value of the reluctance electromagnetic torque Tr from 0 ° to 90 ° is zero. As can be seen from the figure, in addition to the method of setting the current to the electromagnet 7 to 0 when θ = 38 °, there is a method of setting the current to the electromagnet 7 to 0 with a value of θ larger than θ = 38 °.

  Next, a magnetic rotating device according to the fourth embodiment of the present invention will be described. In addition to the configuration of the magnetic rotating device 1 according to the first embodiment described with reference to FIGS. 1 and 2, the magnetic rotating device 1 according to the present embodiment includes a rotating body 2 as shown in FIG. The columnar ferromagnet 131 that can move linearly between the two permanent magnets 6 is provided. Specifically, an angle β formed by a straight line L1 connecting the center O of the disk 5 with the center of gravity 6a of the permanent magnet 6 and a straight line L4 connecting the center O of the disk 5 with the center of gravity 131a of the columnar ferromagnetic body 131A (131) is The permanent magnet 6A (6) is provided so as to be movable on a straight line of about 20 ° to 44 ° when viewed from the direction of the center of gravity 6a. A total of eight columnar ferromagnets 131 are provided on each disk 5, and a reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnet 131 and the electromagnet 7.

  The columnar ferromagnet 131 can move linearly along, for example, a groove (not shown) provided in the disk 5, and the groove allows the columnar ferromagnet 131A to have the above-described minimum value of β. The movable range is limited so that the maximum value is 20 ° and 44 °.

  22 shows a state where the rotational angle θ of the rotating body 2 is 0 °, FIG. 23 shows a state where the rotational angle θ of the rotating body 2 is 20 °, and FIG. 24 shows a state where the rotational angle θ of the rotating body 2 is 44 °. FIG. 25 shows changes in the reluctance electromagnetic torque Tr with respect to these state changes. When energization of the electromagnet 7 is started in the state shown in FIG. 22, that is, θ = 0 °, the columnar ferromagnetic body 131A receives the attractive force from the electromagnet 7A and the attractive force from the electromagnet 7B. Here, since the attractive force from the electromagnet 7A is larger than the attractive force, the reluctance electromagnetic torque Tr is a positive value (+ θ direction).

  FIG. 23 is a diagram showing the state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 in a state where energization is started and θ = 20 °. In this case, as shown in the drawing, the direction of the attractive force between the columnar ferromagnet 131A and the electromagnet 7A is the radial direction. Therefore, the reluctance electromagnetic torque Tr is zero.

  FIG. 24 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 44 °. Also in this case, since the direction of the attractive force between the columnar ferromagnet 131A and the electromagnet 7A is the radial direction as shown in the figure, the reluctance electromagnetic torque Tr is 0 regardless of whether or not the electromagnet 7 is energized. Become. Further, when θ> 44 °, the reluctance electromagnetic torque Tr takes a negative value (−θ direction). Therefore, the current to the electromagnet 7 is controlled to be 0 at θ = 44 °. Thereby, the columnar ferromagnet 131A returns to the state at the start of energization (θ = 0 °).

  FIG. 25 is a characteristic diagram of the reluctance electromagnetic torque Tr generated by the action of the columnar ferromagnet 131 and the electromagnet 7 and the rotation angle θ, and is a θ-Tr characteristic diagram when a constant current flows through the electromagnet 7. As shown in the figure, the reluctance electromagnetic torque Tr turns to a positive value (+ θ direction) at θ = 74 °. This is because the columnar ferromagnet 131A has moved from one end of the groove to the other end, that is, the columnar ferromagnet 131A is in contact with the stopper 142 in the third embodiment. This corresponds to a change to a state of abutting (see FIG. 15). Note that the average value of the reluctance electromagnetic torque Tr is zero.

  As described above, according to the magnetic rotating device 1 according to the present embodiment, the columnar ferromagnetic body 131 that can move linearly between the two permanent magnets 6 of the rotating body 2 is provided and the electromagnet 7 is energized. In addition, since the reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnet 131 and the electromagnet 7, the average electromagnetic torque is increased by the reluctance electromagnetic torque Tr (see FIG. 25) and the electromagnetic torque Te (see FIG. 6). To do. Thereby, further high-speed rotation of the magnetic rotating apparatus 1 can be realized.

  Next, a magnetic rotating device according to a fifth embodiment of the present invention will be described. In addition to the configuration of the magnetic rotating device 1 according to the first embodiment described with reference to FIGS. 1 and 2, the magnetic rotating device 1 according to the present embodiment includes a rotating body 2 as shown in FIG. A columnar ferromagnet 131 that can move on an arc between two permanent magnets 6 of the rotating body 2 centering on the center O is provided. Specifically, an angle β formed by a straight line L1 connecting the center O of the disk 5 to the center of gravity 6a of the permanent magnet 6 and a straight line L4 connecting the center O of the disk 5 to the center of gravity 131a of the columnar ferromagnetic body 131A (131) is The permanent magnet 6 </ b> A (6) is provided so as to be movable on an arc centered on a center O that is about 15 ° to 44 ° when viewed from the direction of the center of gravity 6 a of the permanent magnet 6 </ b> A (6). A total of eight columnar ferromagnets 131 are provided on each disk 5, and a reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnet 131 and the electromagnet 7.

  The columnar ferromagnetic body 131A is supported by the arm 16, and the arm 16 is supported by the bearing 15 provided at the center O of the disk 5, so that the columnar ferromagnetic body 131A can move on the arc. In place of the bearing 15, a cross roller bearing may be used. The movable range of the arm 16 is limited by the stopper 141 and the stopper 142 so that the minimum value of β is 15 ° and the maximum value is 44 °. Here, the minimum value of β is 15 °, but it is also possible to change the θ-Tr characteristic by changing this.

  26 shows a state where the rotation angle θ of the rotating body 2 is 0 °, FIG. 27 shows a state where the rotation angle θ of the rotating body 2 is 15 °, and FIG. 28 shows a state where the rotation angle θ of the rotating body 2 is 44 °. FIG. 29 shows changes in the reluctance electromagnetic torque Tr with respect to these state changes. When energization of the electromagnet 7 is started in the state shown in FIG. 26, that is, θ = 0 °, the columnar ferromagnetic body 131A receives the attractive force from the electromagnet 7A and the attractive force from the electromagnet 7B. Here, since the attractive force from the electromagnet 7A is larger than the attractive force, the reluctance electromagnetic torque Tr is a positive value (+ θ direction).

  FIG. 27 is a diagram showing the state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 15 °. In this case, as shown in the drawing, the direction of the attractive force between the columnar ferromagnet 131A and the electromagnet 7A is the radial direction. Therefore, the reluctance electromagnetic torque Tr is zero.

  FIG. 28 is a diagram illustrating the state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed in the disk 5 in a state where energization is started and θ = 44 °. Also in this case, since the direction of the attractive force between the columnar ferromagnet 131A and the electromagnet 7A is the radial direction as shown in the figure, the reluctance electromagnetic torque Tr is 0 regardless of whether or not the electromagnet 7 is energized. Become. Therefore, the current to the electromagnet 7 is controlled to be 0 at θ = 44 °. The columnar ferromagnet 131A returns to the state at the start of energization (θ = 0 °) when energization is resumed (θ = 90 °).

  FIG. 29 is a characteristic diagram of the reluctance electromagnetic torque Tr generated by the action of the columnar ferromagnet 131 and the electromagnet 7 and the rotation angle θ, and is a θ-Tr characteristic diagram when a constant current flows through the electromagnet 7. As shown in the figure, the reluctance electromagnetic torque Tr turns to a positive value (+ θ direction) at θ = 77 °. This is because the state in which the arm 16 of the columnar ferromagnetic body 131A is in contact with the stopper 142 is changed to the state in contact with the stopper 141. The average value of the reluctance electromagnetic torque Tr from 0 ° to 90 ° is zero. Further, as can be seen from the figure, the method of controlling the current to the electromagnet 7 to be 0 at θ = 44 ° is effective, but when the value of θ is larger than θ = 44 °, the electromagnet 7 In the method of setting the current to 0 to 0, the average value of the reluctance electromagnetic torque Tr being energized decreases.

  Thus, according to the magnetic rotating device 1 according to the present embodiment, the columnar ferromagnetic body that can move on the arc between the two permanent magnets 6 of the rotating body 2 around the center O of the rotating body 2. Since the reluctance electromagnetic torque Tr is generated by the attractive force between the columnar ferromagnetic body 131 and the electromagnet 7 while the electromagnet 7 is energized, the reluctance electromagnetic torque Tr (see FIG. 29) and the electromagnetic torque Te are generated. (See FIG. 6), the average electromagnetic torque increases. Thereby, further high-speed rotation of the magnetic rotating apparatus 1 can be realized.

  In addition, this embodiment is an example of the embodiment of the present invention, and the embodiment can be appropriately changed without departing from the gist of the present invention.

It is a top view which shows the structure of the magnetic rotating apparatus 1 which concerns on embodiment of this invention. It is sectional drawing which shows the AA cross section of FIG. 1 of the magnetic rotating apparatus 1 which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows the stable equilibrium state of the conventional magnetic rotating apparatus using a rod-shaped permanent magnet. It is a schematic diagram which shows the unstable equilibrium state of the conventional magnetic rotating apparatus using a rod-shaped permanent magnet. It is (theta) -Te characteristic view of the conventional magnetic rotation apparatus. 3 is a θ-Te characteristic diagram of the magnetic rotating device 1. FIG. It is sectional drawing which shows the AA cross section in FIG. 1 of the magnetic rotating apparatus 1 which concerns on the 2nd Embodiment of this invention. It is the figure which showed the state of the disk 5, the permanent magnet 6 arrange | positioned in this disk 5, and the columnar ferromagnetic body 121 in (theta) = 20 degree. It is the figure which showed the state of the disk 5, the permanent magnet 6 arrange | positioned in this disk 5, and the columnar ferromagnetic body 121 in (theta) = 45 degree. It is (theta) -Tr characteristic view of the magnetic rotating apparatus 1 which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the AA cross section in FIG. 1 of the magnetic rotating apparatus 1 which concerns on the 3rd Embodiment of this invention. It is the figure which showed the state of the disk 5 and the permanent magnet 6 arrange | positioned in this disk 5, and the columnar ferromagnetic body 131 in (theta) = 20 degree. FIG. 6 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 at θ = 43 °. FIG. 5 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 at θ = 44 °. It is (theta) -Tr characteristic view of the magnetic rotating apparatus 1 which concerns on the 3rd Embodiment of this invention. It is sectional drawing which shows the AA cross section in FIG. 1 of the magnetic rotating apparatus 1 which concerns on the modification of the 3rd Embodiment of this invention. It is the figure which showed the state of the disk 5 and the permanent magnet 6 arrange | positioned in this disk 5, and the columnar ferromagnetic body 131 in (theta) = 20 degree. FIG. 6 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 at θ = 50 °. FIG. 6 is a view showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 at θ = 54 °. FIG. 6 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 at θ = 70 °. It is (theta) -Tr characteristic view of the magnetic rotating apparatus 1 which concerns on the modification of the 3rd Embodiment of this invention. It is sectional drawing which shows the AA cross section in FIG. 1 of the magnetic rotating apparatus 1 which concerns on the 4th Embodiment of this invention. It is the figure which showed the state of the disk 5 and the permanent magnet 6 arrange | positioned in this disk 5, and the columnar ferromagnetic body 131 in (theta) = 20 degree. FIG. 5 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 at θ = 44 °. It is (theta) -Tr characteristic view of the magnetic rotating apparatus 1 which concerns on the 4th Embodiment of this invention. It is sectional drawing which shows the AA cross section in FIG. 1 of the magnetic rotating apparatus 1 which concerns on the 5th Embodiment of this invention. It is the figure which showed the state of the disk 5, the permanent magnet 6 arrange | positioned in this disk 5, and the columnar ferromagnetic body 131 in (theta) = 15 degree. FIG. 5 is a diagram showing a state of the disk 5 and the permanent magnet 6 and the columnar ferromagnetic body 131 disposed on the disk 5 at θ = 44 °. It is (theta) -Tr characteristic view of the magnetic rotating apparatus 1 which concerns on the 5th Embodiment of this invention. It is a figure which shows current rising time T1 and decay time T2.

Explanation of symbols

1 Magnetic rotating device 2 Rotating body (rotor)
3 frames (stator)
6 Permanent magnet 7 Electromagnet 121, 131 Columnar ferromagnet

Claims (7)

A rotor having plate-like permanent magnets with magnetic poles formed on the front and back surfaces, and an electromagnet fixed to the stator corresponding to the permanent magnet and rotating the rotor by applying a magnetic force to the permanent magnet And comprising:
In the relationship between the rotational torque generated by the magnetic force and the rotational angle of the rotor, the current to the electromagnet is cut off in the rotational angle region where the sword-shaped torque (Ta) is generated, and the oka-shaped torque other than the sword-shaped torque (Ta). A magnetic force rotating device that applies a rotating force by a magnetic force to the rotor by energizing the electromagnet in a rotation angle region that generates (Tb) and an Oka torque (Tc).   The permanent magnet has an angle (φ) where a straight line (L1) connecting the center of gravity of the permanent magnet from the center of the rotor and a straight line (L2) in the magnetic pole direction of the permanent magnet is viewed from the center direction of the rotor. The magnetic rotating device according to claim 1, wherein the magnetic rotating device is positioned so as to be approximately 30 ° to 60 °.   The electromagnet is positioned so that the angle between the straight line connecting the center of the rotor and the center of gravity of the electromagnet and the magnetic flux center axis of the electromagnet is greater than 0 ° and not more than 20 ° when viewed from the center of the rotor. The magnetic rotating device according to claim 1 or 2, wherein   A plurality of the permanent magnets are disposed on the rotor, a columnar ferromagnetic body is provided between two permanent magnets of the rotor, and the columnar ferromagnetic body and the electromagnet are energized while the electromagnet is energized. The magnetic revolving device according to claim 1, wherein reluctance electromagnetic torque (Tr) is generated by the attraction force.   While providing a plurality of the permanent magnets in the rotor and providing a columnar ferromagnetic that is movable on an arc having a center between the two permanent magnets of the rotor, and energizing the electromagnet, The magnetic rotating apparatus according to any one of claims 1 to 3, wherein a reluctance electromagnetic torque (Tr) is generated by an attractive force between the columnar ferromagnet and the electromagnet.   A plurality of the permanent magnets are disposed on the rotor, and a columnar ferromagnetic body that is linearly movable between the two permanent magnets of the rotor is provided. While the electromagnet is energized, the columnar ferromagnetic body is provided. 4. The magnetic force rotating device according to claim 1, wherein a reluctance electromagnetic torque (Tr) is generated by an attractive force between the electromagnet and the electromagnet. 5.   A plurality of the permanent magnets are disposed on the rotor, and a columnar ferromagnetic body that is movable on an arc between two permanent magnets of the rotor around the rotor center is provided, and the electromagnet is energized. 4. The magnetic rotating device according to claim 1, wherein a reluctance electromagnetic torque (Tr) is generated by an attractive force between the columnar ferromagnet and the electromagnet.

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