JP6377853B2 - Generator - Google Patents

Description

  The present invention relates to a generator using electromagnetic induction.

  The generator using electromagnetic induction has a magnet provided on one of the rotor and the stator and a coil provided on the other, rotates the rotor relative to the stator, changes the magnetic field applied to the coil, An induction current is generated in the coil by electromagnetic induction. Such a generator includes a radial gap type in which one pole of the magnet and the end face of the cylindrical coil are arranged so as to face each other with a gap in the radial direction with respect to the rotation axis of the rotor, or one of the magnets There is an axial gap type in which the pole and the end face of the cylindrical coil are arranged so as to face each other with a gap in a direction parallel to the rotation axis of the rotor. However, in these generators, a repulsive force is generated when the magnet and the coil approach each other due to a magnetic field generated in the coil by an induced current, and an attractive force (attraction force) is generated when the magnet and the coil are separated from each other. These repulsive forces and attractive forces are factors that reduce the generator efficiency (the ratio of the coil output to the rotor input).

  As a generator different from the above-mentioned type, for example, a pair of magnets are arranged so that the same poles face each other through a gap, and the generator is arranged so that the coil passes between the pair of magnets along its own axial direction. There is a machine (for example, Patent Document 1). The magnetic field lines of the magnetic fields of the magnets with the same pole facing each other repel each other at the center of both magnets and extend radially with respect to the opposing direction of both magnets. Therefore, when the coil passes between the magnets, the direction of the magnetic field is reversed between the first half and the second half.

Japanese Patent Laid-Open No. 2-184243

  However, in the generator of Patent Document 1, it is difficult to say that the repulsive force generated when the coil and the magnet approach each other and the attractive force generated when the coil and the magnet are separated from each other are sufficiently reduced, and there is room for improvement in the generator efficiency.

  In view of the above background, an object of the present invention is to improve generator efficiency in a generator using electromagnetic induction.

  In order to solve the above-described problem, an aspect of the present invention is an electric generator (1), which includes a pair of magnets (17) including a pair of magnets (15) arranged so that the same poles face each other at a distance. ) And a coil (5) having a predetermined axis (X) and at least part of which passes between the magnet pairs, and when the coils pass between the magnet pairs, The angles formed by the facing direction (Y), the axis of the coil, and the relative movement direction (Z) of the coil and the magnet pair are 90 ° ± 20 °, respectively, and the direction along the facing direction of the magnet pair , The magnet has a region (15B) that does not overlap the relative movement locus (C) of the coil. The magnet includes at least one of a permanent magnet and an electromagnet.

  According to this aspect, when the coil and the magnet pair approach each other, the direction of the magnetic field generated in the region that does not overlap with the movement trajectory of the magnet coil as seen from the direction along the opposing direction of the magnet pair, and the induced current The direction of the magnetic field generated in the magnetic field coincides with each other, and an attractive force is generated between the coil and the magnet pair. On the other hand, when the coil and the magnet pair are separated from each other, the direction of the magnetic field generated in the region that does not overlap the movement locus of the magnet coil and the direction of the magnetic field generated in the coil by the induced current when viewed from the direction along the opposing direction of the magnet pair. And the reciprocal force is generated between the coil and the magnet pair. That is, an assist force is applied in the relative movement direction of the coil and the magnet pair. Thereby, the resistance force which prevents the relative movement of a magnet pair and a coil falls, and generator efficiency improves.

  In the above aspect, when viewed from a direction along the opposing direction of the magnet pair, one end of the coil may pass near the center of the magnet.

  According to this aspect, the generator efficiency can be further improved. When viewed from the direction along the opposing direction of the magnet pair, the magnetic field lines of the magnetic field generated by each magnet extend in the radial direction from the center of the magnet. Therefore, when the movement trajectory of the coil overlaps with the center of the magnet when viewed from the direction along the opposing direction of the magnet pair, a part of the magnetic field acting on the coil is opposite to each other, so that the induced current generated is reduced. . Further, when the coil movement trajectory does not overlap with the center of the magnet when viewed from the direction along the opposing direction of the magnet pair, the magnetic field acting on the coil becomes weak and the generated induced current decreases. Therefore, the induced electromotive force generated in the coil can be maximized by arranging the coil so that one end of the coil passes through the vicinity of the center of the magnet when viewed from the direction along the opposing direction of the magnet pair.

  Moreover, said aspect WHEREIN: The said magnet is good to be circular seeing from the direction along the opposing direction of the said magnet pair.

  According to this aspect, in the magnet pair in which the same poles face each other, the magnetic lines of force extend radially by repelling each other, so that each magnet is formed in a circular shape, so that a magnetic field generated from each magnet is generated. It becomes symmetrical with respect to the center of the magnet.

  Further, in the above aspect, when the axis of the coil and the center of the magnet overlap when viewed from the direction along the opposing direction of the magnet pair, the coil overlaps the center of the magnet, and the coil One end may pass through a position of a radius in a radial direction parallel to the axis of the coil of the magnet.

  According to this aspect, the strength of the magnetic field that acts on the coil from the magnet pair and the magnitude of the assist force that acts in the relative movement direction of the coil and the magnet pair are compatible, and the generator efficiency is maximized.

  In the above aspect, the magnet pair is supported by the rotor (3) having a predetermined rotation axis (A) so that the facing direction (Y) of the magnet pair is substantially parallel to the rotation axis, The coil may be fixed to the stator (2) such that an axis (X) of the coil extends in a radial direction of the rotation axis. Alternatively, the magnet pair (211) is supported by a rotor (202) having a predetermined rotation axis (A2) so that the opposing direction (Y2) of the magnet pair faces the radial direction of the rotation axis, The coil (205) may be fixed to the stator (201) so that the axis (X2) of the coil is substantially parallel to the rotation axis.

  According to these aspects, the generator in which the facing direction of the magnet pair, the axis of the coil, and the relative movement direction of the coil and the magnet pair form an angle of 90 ° ± 20 ° with each other can be formed with a simple configuration. it can.

  Further, in the above aspect, each opposing surface (15A) of the magnet pair is formed in a plane, and the coil has two outer surfaces (5B) facing the opposing surfaces of the magnet pair in parallel. Good.

  According to this aspect, the gap between the coil and the magnet can be reduced to increase the magnetic field acting on the coil.

  According to the above aspect, generator efficiency can be improved in the generator using electromagnetic induction.

(A) perspective view, (B) cross-sectional view of the generator according to the first embodiment Sectional drawing of the generator which concerns on 1st Embodiment (A) A side view seen along the radial direction of the rotation axis A showing the positional relationship between the magnet and the coil, (B) A plan view seen along the opposing direction Y of the magnet pair In the generator which concerns on 1st Embodiment, it is explanatory drawing which shows the force which acts when a magnet moves relatively with respect to a coil, Comprising: (A) At the time of approach, (B) At the time of facing, (C) At the time of detachment | leave Indicate Sectional view of a generator according to a comparative example In the generator which concerns on a comparative example, it is explanatory drawing which shows the force which arises in a magnet when a magnet moves relatively with respect to a coil, Comprising: (A) At the time of approach, (B) At the time of facing, (C) At the time of separation Show (A) perspective view of the generator which concerns on the modification of 1st Embodiment, (B) sectional drawing Sectional drawing of the generator which concerns on the other modification of 1st Embodiment. The perspective view of the generator which concerns on 2nd Embodiment.

  Hereinafter, an embodiment of a generator of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the generator 1 includes a housing 2 as a stator and a rotor 3 rotatably supported by the housing 2.

  The housing 2 is formed in a cylindrical shape centered on the axis A. At least one coil 5 is provided on the inner peripheral surface of the housing 2. The coil 5 is formed by winding a winding 5A covered with an insulating film such as enamel in an annular shape, and an iron core 6 is provided at the center thereof. In the present embodiment, the iron core 6 is formed in a quadrangular prism shape, and the coil 5 wound around the outer periphery of the iron core 6 is formed in a square cylindrical shape. The coil 5 is disposed on the inner peripheral surface of the housing 2 so that the axis X of the coil 5 coincides with the radial direction of the axis A. The coil 5 is supported on the inner peripheral surface of the housing 2 at the outer end in the radial direction around the axis A, and the inner end in the radial direction protrudes from the inner peripheral surface of the housing 2 toward the axis A. In the present embodiment, the two coils 5 are arranged with an interval of 180 ° about the axis A. The outer surface 5B on one side and the other side in the axis A direction of the coil 5 is arranged in parallel with a plane orthogonal to the axis A.

  The rotor 3 includes a rotor shaft 11 having an axis A as a rotation axis, and a first arm 12 and a second arm 13 protruding in the radial direction from the rotor shaft 11. One end of the rotor shaft 11 is connected to a power source. The first arm 12 extends from the rotor shaft 11 in the opposite radial directions about the axis A. The second arm 13 is disposed at a distance from the first arm 12 in the direction of the axis A, and extends in the same direction as the first arm 12.

  Magnets 15 are provided at the protruding ends of the first arm 12 and the second arm 13. The magnet 15 may be a permanent magnet or an electromagnet. In the present embodiment, a permanent magnet is used for the magnet 15. The magnet 15 is formed in a disk shape, and its axis is arranged in parallel with the axis A. End faces on one side and the other side of each magnet 15 in the direction of the axis A are formed on a plane orthogonal to the axis A. The magnets 15 provided at the projecting ends of the first arm 12 and the second arm 13 facing each other are arranged so that the centers B coincide with each other in the axis A direction, thereby forming a magnet pair 17. The magnets 15 forming the magnet pair 17 have the same polarity with the opposing surfaces 15A having a predetermined distance. The facing direction Y of the magnet pair 17 (the direction passing through the center B of each magnet 15 forming the magnet pair 17) is parallel to the axis A.

  The inner end portion of the coil 5 is disposed so as to pass between the magnet pair 17. As shown in FIG. 1B, when viewed from the direction along the opposing direction Y of the magnet pair 17, the magnet 15 has a region in the radial direction around the axis A that does not overlap the relative movement locus C of the coil 5. Have inside. That is, the inner portion 15B in the radial direction around the axis A of each magnet 15 does not overlap the relative movement locus C of the coil 5, and the outer portion 15C in the radial direction around the axis A of each magnet 15 It overlaps with the relative movement locus C. In the present embodiment, the positions of the magnet 15 and the coil 5 are set so that the inner edge of the coil 5 passes through the center B of the magnet 15 when viewed from the direction along the facing direction Y of the magnet pair 17. In the present embodiment, the outer end of the coil 5 protrudes outward in the radial direction with the axis A as the center rather than the magnet 15.

  The position of the magnet 15 and the coil 5 is preferably set so that the inner end edge of the coil 5 passes near the center B of the magnet 15. In another embodiment, for example, when the axis X of the coil 5 and the center B of the magnet 15 overlap (coincide) when viewed from the direction along the facing direction Y of the magnet pair 17, the coil 5 The inner end edge (one end) of the coil 5 may overlap with the center B and pass through a position of a radius in the radial direction parallel to the axis X of the coil 5 of the magnet 15.

  Since the magnet pair 17 is supported by the rotor 3 having the axis A as the rotation axis, the relative movement direction Z of the magnet pair 17 and the coil 5 when the coil 5 passes between the magnet pair 17 is centered on the axis A. It becomes the tangent direction of the circle. The axis X of the coil 5, the opposing direction Y of the magnet pair 17, and the relative movement direction Z of the magnet pair 17 and the coil 5 make an angle of 90 ° with each other. In other embodiments, the angle between the axis X of the coil 5, the facing direction Y of the magnet pair 17, and the relative movement direction Z of the magnet pair 17 and the coil 5 may be approximately 90 °, for example, It may be 90 ° ± 20 °.

  As shown in FIGS. 3 (A) and 3 (B), the magnetic force lines ML representing the directions of the magnetic fields generated by the magnets 15 constituting the magnet pair 17 are located at the center between the opposing surfaces 15A of the magnets 15. With a virtual surface 31 parallel to the facing surface 15A as a boundary, they are repelled and bent, and extend in a radial direction centered on the facing direction Y of the magnet pair 17. Thereby, the magnetic force line ML has a component facing inward in the radial direction of the axis A (axis X direction of the coil 5) and a component facing outward.

  Next, the force acting on the magnet 15 and the coil 5 when the magnet pair 17 and the coil 5 move relative to each other will be described with reference to FIGS. First, the operation of a conventional radial gap generator 100 will be described as a comparative example with reference to FIGS. 5 and 6. As shown in FIG. 5, the radial gap generator 100 is provided with a coil 102 on the inner peripheral surface of a cylindrical housing 101 centered on the axis A1, and on the outer peripheral surface of the rotor 103 having the axis A1 as a rotation axis. A magnet 104 which is a permanent magnet is provided. The axis line X1 of the coil 102 and the axis line Y1 of the magnet 104 extend in the radial direction around the axis line A1, and the relative movement direction Z1 of the coil 102 and the magnet 104 is the tangential direction of the circle around the axis line A1, ie, the coil. The direction is orthogonal to the axis X1 of 102 and the axis Y1 of the magnet 104.

  As shown in FIG. 6A, when the magnet 104 approaches the coil 102, the magnetic field of the magnet 104 acting on the coil 102 becomes strong, so that an induction current is generated in the coil 102 due to electromagnetic induction. A magnetic field 41 opposite to the magnetic field of the magnet 104 is generated by the current. As a result, repulsive force, that is, forces 42 and 43 that prevent the magnet 104 from approaching the coil 102 in the relative movement direction are generated between the coil 102 and the magnet 104.

  As shown in FIG. 6B, after the center of the magnet 104 reaches the axis X1 of the coil 102, the magnet 104 is separated from the coil 102 as shown in FIG. Since the magnetic field of the acting magnet 104 becomes weak, an induced current is generated in the coil 102 by electromagnetic induction, and a magnetic field 45 having the same direction as the magnetic field of the magnet 104 is generated by the induced current. Thereby, an attractive force, that is, a force 46 or 47 that prevents the coil 104 from being detached from the coil 102 in the relative movement direction is generated between the coil 102 and the magnet 104.

  Thus, when the magnet 104 approaches and separates from the coil 102, a resistance force that prevents relative movement of the coil 102 and the magnet 104 acts. Therefore, a part of the energy input to the rotor 103 is consumed by the resistance force, and the generator efficiency is reduced.

  On the other hand, in the generator 1 according to the present embodiment, when the rotor 3 is rotated by the power source, the magnet pair 17 rotates about the axis A and moves relative to the coil 5. As shown in FIG. 4A, when the magnet pair 17 approaches the coil 5 and the coil 5 enters between the magnet pair 17, the outer portion 15 </ b> C of the magnet 15 when viewed from the facing direction Y of the magnet pair 17. And the inner end of the coil 5 overlap. As a result, a radially outward magnetic field acts on the inner end portion of the coil 5 by the magnet pair 17. When the magnet pair 17 approaches the coil 5, the radially outward magnetic field acting on the coil 5 becomes strong. Therefore, an induced current is generated in the coil 5 by electromagnetic induction, and the radially inward is induced by the induced current. A magnetic field 51 is generated. The magnetic field 51 generated by the coil 5 is in the opposite direction to the radially outward component generated by the outer portion 15C of the magnet 15, and exerts a repulsive force 52 on the coil 5 and the magnet pair 17 with respect to the coil 5 in the relative movement direction Z. Thus, a force that prevents the magnet 15 from approaching is generated. On the other hand, the magnetic field 51 generated by the coil 5 is in the same direction as the radially inward component generated by the inner portion 15B of the magnet 15, so that the coil 5 and the magnet pair 17 have an attractive force 53, that is, a coil in the relative movement direction Z. 5, a force (assist force) that promotes the approach of the magnet pair 17 is generated. Since the coil 5 is closer to the outer portion 15 </ b> C than the inner portion 15 </ b> B of the magnet 15, the repulsive force 52 generated in the magnet 15 is larger than the attractive force 53. The coil 5 generates a reaction force 54 (repulsive force) against a force obtained by combining the repulsive force 52 and the attractive force 53. Since the attractive force 53 generated in the magnet 15 reduces the repulsive force generated between the coil 5 and the magnet pair 17, the force required to approach the coil 5 and the magnet pair 17 is reduced.

  As shown in FIG. 4 (B), after the center B of the magnet 15 reaches the axis X of the coil 5, as shown in FIG. Moving. When the magnet pair 17 is separated from the coil 5, the radially outward magnetic field acting on the coil 5 is weakened. Therefore, an induced current is generated in the coil 5 by electromagnetic induction, and the radially outward magnetic field is induced by the induced current. 55 occurs. Since the magnetic field 55 generated by the coil 5 is in the same direction as the radially outward component generated by the outer portion 15C of the magnet 15, the attractive force 56 on the coil 5 and the magnet pair 17 is applied to the coil 5 in the relative movement direction Z. On the other hand, a force that prevents the magnet 15 from being detached is generated. On the other hand, the magnetic field 55 generated by the coil 5 is in a direction opposite to the radially inward component generated by the inner portion 15B of the magnet 15, and the repulsive force 57 on the coil 5 and the magnet pair 17, that is, the coil 5 in the relative movement direction Z. In contrast, a force (assist force) that promotes the separation of the magnet 15 is generated. Since the coil 5 is closer to the outer portion 15C than the inner portion 15B of the magnet 15, the attractive force 56 generated in the magnet 15 is larger than the repulsive force 57. The coil 5 generates a reaction force 58 (attraction force) against a force obtained by combining the attraction force 56 and the repulsion force 57. The repulsive force 57 generated in the magnet 15 reduces the attractive force generated between the coil 5 and the magnet pair 17, so that the force required to separate the coil 5 and the magnet pair 17 is reduced.

  As described above, in the generator 1 according to the present embodiment, when the magnet pair 17 approaches the coil 5, the attractive force 53 acts on the coil 5 and the magnet pair 17, and the magnet pair 17 is detached from the coil 5. Since the repulsive force 57 acts on the coil 5 and the magnet pair 17 sometimes, the rotational resistance of the rotor 3 is reduced, and the generator efficiency (= output of the coil 5 / input to the rotor 3) is improved.

  The generator 1 according to the first embodiment can improve the generator efficiency up to 99% in calculation when the influence of friction, iron loss, and the like is excluded. The generator 100 according to the comparative example shown in FIGS. 5 and 6 has a generator efficiency of about 90% in calculation.

  In addition, since the coil 5 has a planar outer surface 5B parallel to the opposing surface 15A of each magnet 15 on both sides in the direction of the axis A, the gap between the coil 5 and each magnet 15 is reduced and 5 can be strengthened.

  The generator 1 according to the first embodiment configured as described above can arbitrarily change the number of coils 5 and magnet pairs 17. For example, as shown in FIG. 7, the number of coils 5 may be three and the number of magnet pairs 17 may be six. In order to support the six magnet pairs 17, the first arm 12 and the second arm 13 may be formed in a flat plate shape, and the magnets 15 may be arranged at equal intervals around the axis A on the outer periphery thereof.

  In the embodiment shown in FIG. 7, when the axis X of the coil 5 and the center B of the magnet 15 overlap (coincide) when viewed from the direction along the facing direction Y of the magnet pair 17, the coil 5 is The inner edge (one end) of the coil 5 overlaps the center B of the magnet 15 and passes through a position of a radius in the radial direction parallel to the axis X of the coil 5 of the magnet 15. When the coil 5 and the magnet pair 17 are arranged in this way, both the strength of the magnetic field that acts on the coil 5 from the magnet pair 17 and the magnitude of the assist force that acts in the relative movement direction of the coil 5 and the magnet pair 17 are compatible. Efficiency is maximized.

  The axis X of the coil 5, the opposing direction Y of the magnet pair 17, and the relative movement direction Z of the magnet pair 17 and the coil 5 may be 90 ° ± 20 °, respectively. And the opposing direction Y of the magnet pair 17, the opposing direction Y of the magnet pair 17 and the relative moving direction Z of the magnet pair 17 and the coil 5, and the relative moving direction Z of the magnet pair 17 and the coil 5. And the angle formed with the axis X of the coil 5 may be the same or different from each other. For example, as shown in FIG. 8, the angle formed by the axis X of the coil 5 and the facing direction Y of the magnet pair 17 is 90 °, the facing direction Y of the magnet pair 17 and the relative moving direction Z of the magnet pair 17 and the coil 5 May be set such that the angle between the relative movement direction Z of the magnet pair 17 and the coil 5 and the axis X of the coil 5 is 75 °. In this case, the axis X of the coil 5 is inclined with respect to the radial direction R of the axis A of the rotor 3.

  In another embodiment, the angle formed by the axis X of the coil 5 and the facing direction Y of the magnet pair 17 and the angle formed by the facing direction Y of the magnet pair 17 and the relative movement direction Z of the magnet pair 17 and the coil 5 are also respectively set. You may make it change arbitrarily from 90 degrees independently. In this case, the magnet pair 17 may be disposed on the rotor 3 so that the facing direction Y is inclined with respect to the axis A. The angle formed by the axis X of the coil 5 and the facing direction Y of the magnet pair 17, the angle formed by the facing direction Y of the magnet pair 17 and the relative movement direction Z of the magnet pair 17 and the coil 5, and the magnet pair 17 and It has been calculated by calculation that the generator efficiency increases as the angle between the relative movement direction Z of the coil 5 and the axis X of the coil 5 approaches 90 °.

  FIG. 9 shows a generator 200 according to the second embodiment. The stator 201 is formed in a flat plate shape, and rotatably supports the rotor shaft 203 of the rotor 202 around the axis A2. Two coils 205 are supported on the stator. The two coils 205 are formed in a cylindrical shape, and the axis line X2 of the coil 205 is parallel to the axis line A and is arranged on a virtual circle centered on the axis line A2. An iron core 207 is disposed inside the coil 5.

  The rotor shaft 203 is provided with an arm 208 extending in a direction opposite to each other in the radial direction about the axis A2. At both ends of the arm 208, a magnet pair 211 composed of two magnets 210 is provided. The magnets 210 constituting the magnet pair 211 are arranged such that the surfaces thereof face the radial direction around the axis A2 and are spaced from each other in the radial direction. The distance between the magnets 210 constituting the magnet pair 211 is formed to be larger than the outer diameter of the coil 205 so that the coil 205 can pass between the two magnets 210. The same poles are arranged on the mutually opposing surfaces of the magnets 210 constituting the magnet pair 211. The lines of magnetic force representing the direction of the magnetic field generated by each magnet 210 constituting the magnet pair 211 are repelled and bent, and extend in a radial direction centering on the opposing direction Y2 of the magnet pair 211 (the radial direction of the axis A).

  When the rotor 202 rotates with respect to the stator 201, the magnet pair 211 moves in the circumferential direction around the axis A <b> 2 and rotates relative to the coil 205. When the coil 205 passes between the magnet pair 211, the relative movement direction Z2 of the magnet pair 211 with respect to the coil 205 is a tangential direction of a circle about the axis A. The axis X2 of the coil 205, the opposing direction Y2 of the magnet pair 211, and the relative movement direction Z2 of the magnet pair 211 and the coil 205 make an angle of 90 ° with each other.

  In the generator 200 according to the second embodiment, when the magnet pair 211 and the coil 205 move relative to each other, the assist force is applied to the magnet pair 211 and the coil 205 as in the generator 1 according to the first embodiment shown in FIG. Acts, the rotational resistance of the rotor 3 is reduced, and the generator efficiency is improved.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. In the above embodiment, an example in which the iron core 6 is arranged in the center of the coil 5 has been shown, but the iron core 6 may be omitted. Further, the positional relationship between the inner end of the coil 5 and the center B of the magnet 15 can be arbitrarily changed. The positional relationship between the inner end of the coil 5 and the center B of the magnet 15 is such that the magnet 15 does not overlap the relative movement locus C of the coil 5 when viewed from the direction along the facing direction Y of the magnet pair 17. The inner end of the coil 5 may pass radially inward or radially outward about the axis A rather than the center B of the magnet 15.

1: Generator 2: Housing (stator)
3: Rotor 5: Coil 5B: Outer surface 15: Magnet 15A: Opposing surface 15B: Inner portion 15C: Outer portion 17: Magnet pair 200: Generator 201: Stator 202: Rotor 205: Coil 210: Magnet 211: Magnet pair A , A1, A2: axis (rotation axis)
B: Magnet center C: Relative movement trajectory ML: Magnetic field lines X, X1, X2: Coaxial axes Y, Y1, Y2: Opposing directions of magnet pairs Z, Z1, Z2: Relative moving directions of coils and magnet pairs

Claims (7)

A magnet pair including a pair of magnets arranged so that the same poles face each other at a distance;
A coil having a predetermined axis and at least a portion passing between the magnet pair,
When the coil passes between the magnet pairs, the angle between the facing direction of the magnet pair, the axis of the coil, and the relative movement direction of the coil and the magnet pair is 90 ° ± 20 °, respectively. The generator has a region where the magnet does not overlap with the relative movement locus of the coil when viewed from the direction along the opposing direction of the magnet pair.   2. The generator according to claim 1, wherein one end of the coil passes near the center of the magnet when viewed from a direction along an opposing direction of the magnet pair.   The generator according to claim 1 or 2, wherein the magnet has a circular shape when viewed from a direction along a facing direction of the magnet pair.   When viewed from the direction along the opposing direction of the magnet pair, when the axis of the coil and the center of the magnet overlap, the coil overlaps the center of the magnet, and one end of the coil is the coil of the magnet. The generator according to claim 3, wherein the generator passes through a position of ½ of the radius in the radial direction parallel to the axis of the generator. The magnet pair is supported by a rotor having a predetermined rotation axis so that the facing direction of the magnet pair is substantially parallel to the rotation axis,
The generator according to any one of claims 1 to 4, wherein the coil is fixed to a stator such that an axis of the coil extends in a radial direction of the rotation axis. The magnet pair is supported by a rotor having a predetermined rotation axis so that the opposing direction of the magnet pair faces the radial direction of the rotation axis,
The generator according to any one of claims 1 to 4, wherein the coil has an axis of the coil fixed to the stator substantially parallel to the rotation axis. Each facing surface of the magnet pair is formed in a plane,
The generator according to any one of claims 1 to 6, wherein the coil has two outer surfaces facing in parallel with each facing surface of the magnet pair.

Images