JP2007006652A - Power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power generator which generates power, without generating toxic substances and moreover, without consuming a large quantity of the earth's resources. <P>SOLUTION: A rotor is rotated with acceleration, in the direction of an arrow mark (A) due to attraction force and repulsive force generated by magnetic force between permanent magnets 20-1 to 20-12 secured to the rotor and permanent magnets 26-1 to 26-12, 28-1 to 28-12 secured to a stator. The permanent magnets 28-1 to 28-12 are smaller than the permanent magnets 26-1 to 26-12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power generation device that generates power using a magnet such as a permanent magnet.

  For example, there is a system that generates power based on energy generated by burning fuel such as oil.

In the conventional system described above, a large amount of carbon dioxide is discharged by burning oil or the like, which causes various problems in the global environment.
In addition, resources such as oil are limited.

  The present invention has been made in view of the above-described prior art, and an object of the present invention is to provide a power generation device that efficiently generates power without generating a large amount of carbon dioxide and without consuming a large amount of earth resources. And

  In order to achieve the above-described object, the power generation device of the present invention includes an outer peripheral surface, and the S first magnets are provided such that the outer peripheral surface side is a first magnetic pole and the opposite side is a second magnetic pole. A first member disposed at equally spaced positions in the circumferential direction on the outer circumferential surface, and an inner circumferential surface facing the outer circumferential surface and having the same central axis as the outer circumferential surface of the first member. The second member is disposed on the inner peripheral surface so that the inner peripheral surface side becomes the first magnetic pole and the side of the first magnet facing the second magnetic pole becomes the second magnetic pole. The second magnet and the inner peripheral surface side become the second magnetic pole, and the side of the first magnet facing the second magnetic pole becomes the first magnetic pole, and is in contact with or close to the second magnet. T magnets each arranged by an inner peripheral surface and a third magnet having a size smaller than that of the second magnet. When the body rotates at least one of the first member and the second member about the central axis, the second magnetic poles of each of the S first magnets are the M pieces. The second magnetic poles constituting the magnet body and the second magnetic poles of the third magnet and the first magnetic poles of the third magnet are alternately spaced at equal intervals in the circumferential direction on the inner peripheral surface. And a second member disposed.

In the power generation device of the present invention, preferably, the end of the third magnet on the side facing the first magnet is at the end of the second magnet on the side facing the first magnet. In comparison, the first magnet is located away from the first magnet.
In the power generation device of the present invention, preferably, the S and T satisfy S = T + 1 or T = S + 1.
In the power generating apparatus of the present invention, preferably, S and T satisfy the condition that S is not a divisor of T, T is not a divisor of S, and S ≠ T.
In the power generation device of the present invention, preferably, at least one of the first member and the second member is fixed.
In the power generation device of the present invention, it is preferable that the first magnet, the second magnet, and the third magnet have a longitudinal direction in which the central axis extends.
In the power generation device of the present invention, preferably, a cross section perpendicular to the central axis of the second magnet and the third magnet becomes smaller toward the outer peripheral surface of the first member. .

In the power generation device of the present invention, preferably, the cross section of the third magnet is larger than the cross section of the second magnet.
In the power generation device of the present invention, preferably, a cross section of the first magnet perpendicular to the central axis becomes smaller toward the inner peripheral surface of the second member.
In the power generation device of the present invention, preferably, the first magnet, the second magnet, and the third magnet are permanent magnets.

  According to the present invention, it is possible to provide a power generation device that generates power without generating harmful substances and without consuming a large amount of earth resources.

Hereinafter, the power generator concerning embodiment of this invention is demonstrated.
<First Embodiment>
FIG. 1 is a cross-sectional configuration diagram of a power generation device 1 according to a first embodiment of the present invention.
FIG. 2 is an external view of the power generation device 1 viewed from the right side in FIG.
3 shows the arrangement of permanent magnets 20-s (s is an integer of 1 ≦ s ≦ 12) and magnet bodies 24-t (t is an integer of 1 ≦ t ≦ 13) in the cross-sectional configuration taken along the cross-sectional line A_A shown in FIG. It is a figure for demonstrating.

In the present embodiment, the case of S = 12, T = 13 is illustrated corresponding to the first invention.
Further, the S pole of the present embodiment corresponds to the first magnetic pole of the first invention, and the N pole of the present embodiment corresponds to the second magnetic pole of the first invention.
Further, the rotor case 16 and the rotor magnet enclosing case 18 correspond to the first member of the first invention, and the outer peripheral surface 18a corresponds to the outer peripheral surface of the first invention.
The housing 10 and the stator magnet enclosing case 22 of the present embodiment correspond to the second member of the first invention, and the inner peripheral surface 22a corresponds to the inner peripheral surface of the first invention.
The permanent magnet 20-s corresponds to the first magnet of the first invention, the permanent magnet 26-t corresponds to the second magnet of the first invention, and the permanent magnet 28-t corresponds to the first invention. This corresponds to the third magnet.

As shown in FIG. 1, a bearing 14 is fixed to the housing 10 of the power generation device 1.
The shaft 12 is rotatably supported by a bearing 14.
A rotor case 16 is fixed to the shaft 12.
A rotor magnet enclosing case 18 is fixed to the rotor case 16.
The rotor magnet enclosing case 18 has an outer peripheral surface 18a having the same center axis 9 as the shaft 12, and as shown in FIG. 3, twelve permanent magnets 20 are equidistant from the outer peripheral surface 18a in the circumferential direction. -1 to 20-12 are fixed.
The permanent magnets 20-1 to 20-12 have their S poles fixed to the outer peripheral surface 18 a side of the rotor magnet enclosing case 18, and their N poles on the opposite side (inner peripheral surface 22 a of the stator magnet enclosing case 22. Located on the side).

A stator magnet enclosing case 22 having an inner peripheral surface 22a facing the outer peripheral surface 18a is fixed to the housing 10 with the central axis 9 being the same.
As shown in FIG. 3, 13 magnet bodies 24-1 to 24-13 are fixed to the inner circumferential surface 22a of the stator magnet enclosing case 22 at equal intervals in the circumferential direction.

As shown in FIG. 3, the magnet body 24-t (t is an integer satisfying 1 ≦ t ≦ 13) is configured by arranging a permanent magnet 26-t and a permanent magnet 28-t in contact with or close to each other.
The permanent magnet 26-t has its south pole fixed to the inner peripheral surface 22a of the stator magnet enclosing case 22, and its north pole is located on the opposite side (the outer peripheral surface 18a side of the rotor magnet enclosing case 18). .
The permanent magnet 28-t has its north pole fixed to the inner peripheral surface 22a of the stator magnet enclosing case 22, and its south pole positioned on the opposite side (the outer peripheral surface 18a side of the rotor magnet enclosing case 18). .

  Specifically, as shown in FIG. 3, the rotor case 16 (outer peripheral surface 18 a) rotates about the central axis 9, so that twelve permanent magnets 20-s (s is an integer of 1 ≦ t ≦ 12). ) Are alternately opposed to the N poles of the permanent magnets 26-t of the thirteen magnet bodies 24-t and the S poles of the permanent magnets 28-t, respectively. Are disposed on the inner peripheral surface 22a.

FIG. 4 is a view for explaining the arrangement of the permanent magnets 20-s and the magnet bodies 24-t in the cross section taken along the cross sectional line A_A in FIG. 1 shown in FIG.
For example, as shown in FIG. 4, the diameter of the outer peripheral surface 18a of the rotor magnet enclosing case 18 is 88 mm with the center axis 9 as the center, and the diameter of the inner peripheral surface 22a of the stator magnet enclosing case 22 is 155 mm. .

As shown in FIGS. 4 to 6, the radial thickness (height) of the permanent magnet 20-s, the permanent magnet 26-t, and the permanent magnet 28-t is 15 mm.
For example, as illustrated in FIG. 5, the permanent magnet 20-s has a line-symmetric trapezoidal cross section with a short side of 4 mm and a long side of 18 mm, and a depth of 70 mm.
The height of the permanent magnet 20-s is, for example, 16 mm.

For example, as shown in FIGS. 6A and 6B, the permanent magnet 26-t has a trapezoidal cross section having a right inner angle of 2 mm short side and 10 mm long side, and has a depth of 70 mm.
The height of the permanent magnet 26-t is, for example, 15 mm.
As shown in FIG. 4, the distance in the diametrical direction between the surface 20-sa constituted by the short side of the permanent magnet 20-s and the surface 26-ta constituted by the short side of the permanent magnet 26-t is 1 mm. (= (122−120) / 2).

For example, as shown in FIGS. 6C and 6D, the permanent magnet 28-t has a trapezoidal cross section with a right inner angle of 2 mm short side and 10 mm long side, and has a depth of 70 mm.
The height of the permanent magnet 28-t is, for example, 7.5 mm, which is half the height of the permanent magnet 27-t.
The distance in the diameter direction between the surface 20-sa constituted by the short side of the permanent magnet 20-s and the surface 28-ta constituted by the short side of the permanent magnet 28-t is, for example, as shown in FIG. 9.5 mm.

  As described above, in the present embodiment, the size of the permanent magnet 28-t is smaller than that of the permanent magnet 26-t. Further, the permanent magnet 28-t is disposed at a position farther from the permanent magnet 20-s than the permanent magnet 26-t.

Hereinafter, the operation of the power generation device 1 will be described with reference to FIG.
The power generation device 1 mainly attracts the repulsive force between the N pole of the permanent magnet 20-s and the N pole of the permanent magnet 26-t, and the N pole of the permanent magnet 20-s and the S pole of the permanent magnet 28-t. Under the force, the inner ring rotor case 16 rotates in the direction of arrow A (counterclockwise) in FIG.
At this time, as described above, the size of the permanent magnet 28-t is made smaller than that of the permanent magnet 26-t, and the permanent magnet 28-t is changed to the permanent magnet 26-t with respect to the permanent magnet 20-s. By disposing at a relatively far position, the attractive force between the N pole of the permanent magnet 20-s and the S pole of the permanent magnet 28-t can be reduced by the N pole of the permanent magnet 20-s and the permanent magnet 26-t. The repulsive force with the N pole can be reduced to approximately half, and the rotor case 16 can be prevented from stopping due to the balance between the repulsive force and the attractive force.

Hereinafter, the case where the rotor case 16 exists in the rotation position centering on the shaft 12 which positions the permanent magnet 20-s as shown in FIG. 7 is considered.
In the rotational position shown in FIG. 7, the N pole of the permanent magnet 20-1 is close to the N pole of the permanent magnet 26-1 and the S pole of the permanent magnet 28-1 by an equal distance. The strong repulsive force that rotates the rotor case 16 in the direction of arrow B in FIG. 7 is generated by the repulsive force by the N pole of 26-1 and the attractive force by the S pole of the permanent magnet 28-1.
Further, the N pole of the permanent magnet 20-2 is located close to and opposite to the S pole of the permanent magnet 28-2, and the N pole of the permanent magnet 26-2 is also close to the permanent magnet 26-2. The strong repulsive force that rotates the rotor case 16 in the direction of arrow B in FIG.
Further, since the N pole of the permanent magnet 20-3 is very close to the S pole of the permanent magnet 28-3, the rotor case 16 is moved to the arrow in FIG. 7 by the attractive force of the S pole of the permanent magnet 28-3. A strong rotational force that rotates in the direction of arrow A opposite to B is generated.
Further, since the N pole of the permanent magnet 20-4 is close to the S pole of the permanent magnet 28-4, the rotor case 16 is indicated by the arrow A in FIG. A strong rotational force that rotates in the direction is generated.
Further, since the N pole of the permanent magnet 20-5 is close to the S pole of the permanent magnet 28-5, the rotor case 16 is shown by the arrow A in FIG. A strong rotational force that rotates in the direction is generated.
The N pole of the permanent magnet 20-6 is positioned between the N pole of the permanent magnet 26-7 and the S pole of the permanent magnet 28-6, and the repulsive force of the N pole of the permanent magnet 26-7 and the permanent magnet. A strong rotational force for rotating the rotor case 16 in the direction of arrow A in FIG.
The N pole of the permanent magnet 20-7 is positioned between the N pole of the permanent magnet 26-8 and the S pole of the permanent magnet 28-7, and the repulsive force of the N pole of the permanent magnet 26-8 and the permanent magnet A strong rotational force for rotating the rotor case 16 in the direction of arrow A in FIG.

Further, the N pole of the permanent magnet 20-8 generates a rotational force that rotates the rotor case 16 in the direction of arrow A in FIG. 7 by the repulsive force of the N pole of the permanent magnet 26-9.
Further, since the N pole of the permanent magnet 20-9 is close to the N pole of the permanent magnet 26-10, the rotor case 16 is indicated by the arrow A in FIG. 7 by the repulsive force of the N pole of the permanent magnet 26-10. A strong rotational force that rotates in the direction is generated.
Further, since the N pole of the permanent magnet 20-10 is close to the N pole of the permanent magnet 26-11, the rotor case 16 is shown by the arrow A in FIG. 7 by the repulsive force of the N pole of the permanent magnet 26-11. A strong rotational force that rotates in the direction is generated.

The N pole of the permanent magnet 20-11 is located close to and opposite to the N pole of the permanent magnet 26-12, and is also close to the S pole of the permanent magnet 28-12. A strong rotational force that rotates in the direction of arrow B is generated.
The N pole of the permanent magnet 20-12 is located close to and opposite to the N pole of the permanent magnet 26-13, and is also close to the S pole of the permanent magnet 28-13. A strong rotational force that rotates in the direction of arrow B is generated.

As described above, at the rotational position shown in FIG. 7, the rotor case 16 has the permanent magnets 20-3, 20-4, 20-5, 20-6, 20-7, 20-8, 20-9, 20-. 10 generates a rotational force that rotates the rotor case 16 in the direction of the arrow A in FIG. 7, and the permanent magnets 20-11, 20-12, 20-1, 20-2 move the rotor case 16 in the direction of the arrow B in FIG. Rotational force to rotate is generated.
At this time, when the total sum of the rotational forces is calculated, a strong rotational force for rotating the rotor case 16 in the direction of arrow A is generated at the rotational position shown in FIG.

Hereinafter, the rotational force corresponding to the rotational position of the rotor case 16 around the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is within the time period for which the rotor case 16 makes one rotation. The twelve first to twelfth timings defined at substantially the same time intervals are viewed in time series.
For example, at the timing (second timing) next to the timing shown in FIG. 7 (hereinafter also referred to as the first timing), the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s. 7 is the same as the positional relationship between the permanent magnet 26-13 and the permanent magnet 28-13 and the permanent magnet 20-s shown in FIG. 7, and the total rotational force is the same as in the case shown in FIG. A strong rotational force that rotates the rotor case 16 in the direction of arrow A is obtained.

  Next, at the third timing next to the second timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −12 and the permanent magnet 28-12 and the positional relationship between the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the fourth timing next to the third timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. -11 and the positional relationship between the permanent magnet 28-11 and the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the fifth timing next to the fourth timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −10, and the permanent magnet 28-10 and the permanent magnet 20-s have the same positional relationship, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the sixth timing next to the fifth timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is as follows. −9, and the positional relationship between the permanent magnet 28-9 and the permanent magnet 20-s is the same, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the seventh timing next to the sixth timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −8 and the permanent magnet 28-8 and the positional relationship between the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the eighth timing next to the seventh timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −7 and the permanent magnet 28-7 and the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the ninth timing next to the eighth timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −6 and the permanent magnet 28-6 and the permanent magnet 20-s are in the same positional relationship, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the tenth timing next to the ninth timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −5 and the positional relationship between the permanent magnet 28-5 and the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the eleventh timing next to the tenth timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. -4 and the permanent magnet 28-4 and the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the twelfth timing next to the eleventh timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −3 and the permanent magnet 28-3 and the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  Next, at the thirteenth timing next to the twelfth timing, the positional relationship between the permanent magnet 26-1, the permanent magnet 28-1, and the permanent magnet 20-s is the permanent magnet 26 shown in FIG. −2 and the positional relationship between the permanent magnet 28-2 and the permanent magnet 20-s, and the total rotational force is strong enough to rotate the rotor case 16 in the direction of arrow A as in the case shown in FIG. It becomes a rotational force.

  After the thirteenth timing, the process returns to the first timing.

As described above, according to the power generation device 1, as described above, the strong rotational force that rotates the rotor case 16 in the direction of the arrow A in FIG. Even if the rotational friction of the shaft 12 and the air resistance are taken into consideration, sufficient rotational power that enables power generation by the generator 8 can be generated.
In the power generation device 1, a very strong rotational force that rotates the rotor case 16 can be obtained by both the repulsive force and the attractive force of the permanent magnet.
In the power generation device 1, as described above, the size of the permanent magnet 28-t is made smaller than that of the permanent magnet 26-t, and the permanent magnet 28-t is replaced with the permanent magnet 26-t. By disposing at a position distant from -t, the attractive force between the N pole of the permanent magnet 20-s and the S pole of the permanent magnet 28-t can be reduced to the N pole of the permanent magnet 20-s and the permanent magnet 26. It can be made substantially half of the repulsive force with the N pole of -t, and it can be avoided that the rotor case 16 stops due to the balance between the repulsive force and the attractive force.

The rotational force increases as the length of the permanent magnets 20-s, 26-t, 28-t in the longitudinal direction is increased.
Further, in the power generation device 1, the rotational speed can be reduced or the rotation can be stopped by moving the rotor case 16 to the outside of the stator magnet enclosing case 22 with a manual foot lever or a hydraulic jack.

Second Embodiment
In the present embodiment, for example, as shown in FIG. 8, the N pole and the S pole of the N pole magnet 20-s are arranged in the opposite directions to the case of the first embodiment.
In the case shown in FIG. 8, the rotor case 16 rotates strongly in the direction of the arrow B with a rotational force on the same principle as in the first embodiment.

<Third Embodiment>
In the present embodiment, for example, as shown in FIG. 9, six permanent magnets 20-1, 20-3, 20-5 are arranged at equal intervals in the circumferential direction on the outer peripheral surface 18 a of the rotor magnet enclosing case 18. 20-7, 20-9, and 20-11 are fixed.
According to this embodiment, the same effect as that of the first embodiment can be obtained.

The present invention is not limited to the embodiment described above.
In the above-described embodiment, the case of S = 12, T = 13 is illustrated, but the present invention is based on the condition that S = T + 1 or T = S + 1, or S is not a divisor of T, and T is a divisor of S. It is not particularly limited as long as it satisfies the condition that it is not a number and S ≠ T.

  The present invention can be applied to a power generation device that generates power using a magnet such as a permanent magnet.

FIG. 1 is a cross-sectional configuration diagram of a power generation device according to a first embodiment of the present invention. FIG. 2 is an external view of the power generation device viewed from the right side in FIG. 3 shows the arrangement of permanent magnets 20-s (s is an integer of 1 ≦ s ≦ 12) and magnet bodies 24-t (t is an integer of 1 ≦ t ≦ 13) in the cross-sectional configuration taken along the cross-sectional line A_A shown in FIG. It is a figure for demonstrating. FIG. 4 is a diagram for explaining the size of the portion shown in FIG. FIG. 5 is a diagram for explaining the dimensions of the permanent magnet 20-s. FIG. 6 is a diagram for explaining the dimensions of the permanent magnets 26-t and 28-t. FIG. 7 is a diagram for explaining the operation of the power generation device according to the first embodiment of the present invention. FIG. 8 is a view for explaining a power generation apparatus according to the second embodiment of the present invention. FIG. 9 is a diagram for explaining a power generation device according to a third embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Power generation device, 8 ... Generator, 9 ... Center axis, 10 ... Housing, 12 ... Shaft, 14 ... Bearing, 16 ... Rotor case, 18 ... Rotor magnet enclosure case, 22 ... Stator magnet enclosure case, 20 -S, 26-t, 28-t ... permanent magnet

Claims (10)

S first magnets are arranged at equally spaced positions in the circumferential direction on the outer peripheral surface so that the outer peripheral surface has a first magnetic pole and the opposite side becomes a second magnetic pole. A first member;
A second member having an inner peripheral surface facing the outer peripheral surface and having the same central axis as the outer peripheral surface of the first member, wherein the inner peripheral surface side serves as a first magnetic pole and the first magnet The second magnet disposed on the inner peripheral surface so that the side facing the second magnetic pole becomes the second magnetic pole, and the inner peripheral surface side becomes the second magnetic pole, and the first magnet A side opposite to the second magnetic pole becomes the first magnetic pole, and is arranged on the inner peripheral surface in contact with or in proximity to the second magnet, and a third magnet having a smaller size than the second magnet. In each of the T magnet bodies configured, at least one of the first member and the second member rotates about the central axis, so that the first of the S first magnets The second magnetic poles and the third magnetic poles of the second magnet, wherein the two magnetic poles constitute the M magnet bodies. Of the first so as to face the magnetic pole and alternately, the power generating device and a second member disposed at equidistant positions in the circumferential direction on the inner peripheral surface. The end of the third magnet on the side facing the first magnet is farther from the first magnet than the end of the second magnet on the side facing the first magnet. The power generation device according to claim 1, wherein the power generation device is located. The power generation device according to claim 1, wherein the S and T satisfy S = T + 1 or T = S + 1. The power generation device according to claim 1, wherein the S and T satisfy a condition that S is not a divisor of T, T is not a divisor of S, and S ≠ T. The power generation device according to claim 1, wherein at least one of the first member and the second member is fixed. The power generation device according to any one of claims 1 to 5, wherein the first magnet, the second magnet, and the third magnet have a longitudinal direction as a direction in which the central axis extends. The power generation according to any one of claims 1 to 6, wherein a cross section perpendicular to the central axis of the second magnet and the third magnet decreases toward the outer peripheral surface of the first member. apparatus. The power generation device according to claim 7, wherein the cross section of the third magnet is larger than a cross section of the second magnet. The power generation device according to any one of claims 1 to 8, wherein a cross section of the first magnet perpendicular to the central axis decreases toward the inner peripheral surface of the second member. The power generation device according to claim 1, wherein the first magnet, the second magnet, and the third magnet are permanent magnets.

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