JP6309916B2 - Linear generator - Google Patents

Description

  The present invention relates to a linear power generator.

  There is a vibration generator (or reciprocating generator) that converts kinetic energy of a reciprocating permanent magnet into electric energy (see, for example, Patent Document 1). In this specification, such a vibration generator (or reciprocating generator) is referred to as a linear power generator. The linear power generator has a center yoke that reciprocates (vibrates) corresponding to the rotor of the rotary generator and an outer yoke that corresponds to the stator of the rotary generator. Generally, it has a winding part (coil part) on the outer yoke side, a permanent magnet on the center yoke side, and electric power generated in the winding part as the center yoke reciprocates within the fixed outer yoke. To take out. Moreover, in a rotary generator, in order to obtain the smooth motion of a rotating shaft, there are many examples using the technique which suppresses cogging (for example, refer patent document 2). On the other hand, in the linear power generation device, only the example by the same inventors is seen about the suppression of cogging for obtaining a smooth movement of the center yoke (see Patent Document 3).

JP-A-11-262234 JP 2006-101695 A JP 2013-165573 A

  As described above, even in the linear power generation apparatus, cogging becomes a force that hinders the reciprocating motion of the center yoke. Therefore, cogging is required to be suppressed because it is not preferable for efficient power generation. However, if efforts are made to suppress cogging, the structure becomes complicated, large power generation cannot be obtained, and power generation efficiency decreases.

  Accordingly, an object of the present invention is to provide a linear power generator that can sufficiently suppress cogging and can solve any one or more of the above-described problems.

  The present invention provides a linear power generator in which one or both of the center yoke and the outer yoke move linearly by the gas sent and exhausted, and has a center winding portion on the center side and a plurality of outer peripheral permanent magnets on the outer periphery side. And a center yoke made of a soft magnetic material, and a plurality of groove portions on the center side and a plurality of winding portions on the outer peripheral side, and an outer yoke made of a soft magnetic material.

  For example, air supply is performed by an air supply device, exhaust is performed by opening an exhaust valve, and the space to be supplied and exhausted can be a space in the center yoke or a space between the center yoke and the outer yoke.

  As a more specific example, in the linear power generator of the present invention, the center yoke has a cylindrical shape, and the cylindrical outer periphery has a plurality of rod-shaped rods that are long in the axial direction and NS magnetized in the circumferential direction. Are arranged such that the outer peripheral permanent magnets are spaced apart in the circumferential direction so that the opposing magnetic poles of the outer peripheral permanent magnets adjacent to each other in the circumferential direction have the same polarity, and are arranged in a straight line in the circumferential direction. The outer yoke is cylindrical and is arranged in the circumferential direction around the central axis. A plurality of winding portions, a plurality of groove portions arranged at positions facing the outer peripheral permanent magnet, a half-pitch shift in the axial direction facing the center-side protruding portion, and sandwiching the groove portions in the circumferential direction And an outer side protruding portion. Cormorant can be in.

  Alternatively, in the linear power generator according to the present invention, the center yoke has a cylindrical shape, and a plurality of rod-shaped outer peripheral magnets that are long in the axial direction and NS magnetized in the circumferential direction are arranged around the cylindrical outer periphery. Are arranged so that the opposing magnetic poles of the outer peripheral permanent magnets adjacent to each other in the circumferential direction have the same polarity, and are arranged in a straight line in the circumferential direction and sandwiching the outer permanent magnets. It has a plurality of center side protrusions arranged adjacent to each other with a half-pitch shift in the axial direction, and has a center winding portion on the inner peripheral side of the arrangement position of the outer peripheral permanent magnet. Is a cylindrical shape, and is opposed to the plurality of winding portions disposed in the circumferential direction around the central axis, the plurality of groove portions disposed at positions facing the outer peripheral permanent magnet, and the center side protruding portion. Are arranged in a straight line in the circumferential direction And the outer-side projection sandwiching the parts in the circumferential direction, are those as having.

  As another specific example, the linear power generator of the present invention is cylindrical, and a plurality of rod-shaped outer peripheries that are long in the axial direction and NS magnetized in the circumferential direction are provided on the outer periphery of the cylindrical shape. A plurality of center-side protrusions arranged in a straight line in the circumferential direction, with the permanent magnets arranged in the circumferential direction spaced apart in the circumferential direction so that the opposing magnetic poles of the circumferential permanent magnets facing each other have the same polarity A central yoke made of a soft magnetic material having a center winding portion and a cylindrical shape on the inner peripheral side of the arrangement position of the outer peripheral permanent magnet, and arranged in the circumferential direction around the central axis A plurality of winding portions, a plurality of groove portions arranged at positions facing the outer peripheral permanent magnet, a half-pitch shift in the axial direction facing the center-side protruding portion, and sandwiching the groove portions in the circumferential direction An outer yoke made of a soft magnetic material, Have, either or both of the center yoke and outer yoke are intended to move linearly.

  Alternatively, the linear power generator according to the present invention is cylindrical, and a plurality of rod-shaped outer permanent magnets that are long in the axial direction and NS magnetized in the circumferential direction are arranged on the cylindrical outer periphery in the circumferential direction. Between the ones that are arranged so that the opposing magnetic poles of the outer peripheral permanent magnets that are adjacent to each other in the circumferential direction are the same pole, and are arranged in a straight line in the circumferential direction, and the installation positions that sandwich the outer permanent magnet are adjacent to each other And a center yoke made of a soft magnetic material having a center winding portion on the inner peripheral side of the arrangement position of the outer peripheral permanent magnet, Cylindrical, a plurality of winding portions disposed in the circumferential direction around the central axis, a plurality of groove portions disposed at positions facing the outer peripheral permanent magnet, and a periphery facing the center side protruding portion Arranged in a straight line in the direction and sandwiching the groove in the circumferential direction Has a Uta side projection, the outer yoke having, a, either or both of the center yoke and outer yoke are intended to move linearly.

  At this time, on the inner periphery of the center yoke, a plurality of plate-shaped inner peripheral permanent magnets that are NS magnetized in a direction that is long in the axial direction and perpendicular to the circumferential direction are used in the circumferential direction and adjacent inner circumferences. Permanent magnets can be arranged so that the magnetization directions are opposite, and the arrangement positions of the outer peripheral permanent magnets and the arrangement positions of the inner peripheral permanent magnets are alternated.

  Further, an outer yoke permanent magnet that is NS-magnetized so as to have a polarity opposite to that of the outer peripheral permanent magnet of the opposing center yoke may be disposed in the groove portion along the axial direction.

  According to the present invention, cogging can be sufficiently suppressed, and any one or more of the above problems can be solved.

It is a figure which shows the structure of the electric power generating apparatus using the linear electric power generating apparatus which concerns on embodiment of this invention. It is a figure for demonstrating the drive principle of the electric power generating apparatus of FIG. 1, and is a figure which shows the state which a center yoke begins to move to one side. It is a figure for demonstrating the drive principle of the electric power generating apparatus of FIG. 1, and is a figure which shows the state which the center yoke which moved to one side stopped once. It is a figure for demonstrating the drive principle of the electric power generating apparatus of FIG. 1, and is a figure which shows the state which a center yoke begins to move to the other. It is a figure for demonstrating the drive principle of the electric power generating apparatus of FIG. 1, and is a figure which shows the state which the center yoke which moved to the other side stopped once. It is a figure which shows the structure of the electric power generating apparatus using the linear electric power generating apparatus which concerns on embodiment of this invention different from FIG. It is the figure which looked at the center yoke and the outer yoke of the linear electric power generating apparatus of embodiment of this invention from the axial direction (vibration direction). It is a figure which divides | segments and shows the structural member of the center yoke and outer yoke of the linear electric power generating apparatus of FIG. It is a perspective view which shows the center yoke of the linear electric power generating apparatus of FIG. 7, FIG. It is a perspective view which shows the type A which is a part of outer yoke of the linear electric power generating apparatus of FIG. 7, FIG. It is a perspective view which shows the type B which is another part of the outer yoke of the linear electric power generating apparatus of FIG. 7, FIG. It is a figure which shows the correspondence of a center side protrusion part and an outer side protrusion part. It is a figure which shows state S1 in the positional relationship of a center side protrusion part and an outer side protrusion part. It is a figure which shows the state of the magnetic path which generate | occur | produces in the linear electric power generating apparatus in state S1 of FIG. It is a figure which shows state S2 in the positional relationship of a center side protrusion part and an outer side protrusion part. It is a figure which shows the state of the magnetic path which generate | occur | produces in the linear electric power generating apparatus in state S2 of FIG. It is a figure which shows state S3 in the positional relationship of a center side protrusion part and an outer side protrusion part. It is a figure which shows the state of the magnetic path which generate | occur | produces in the linear electric power generating apparatus in state S3 of FIG. It is a figure which shows the change of the positional relationship with progress of time (time t1-t5) of a center side protrusion part and an outer side protrusion part. It is a figure which shows typically the generation | occurrence | production state of the electric current in the coil | winding part in the linear electric power generating apparatus in progress of time (time t1-t5) of FIG. It is a figure which shows the state of the magnetic path in the structure and state S1 of the linear electric power generating apparatus of other embodiment. It is a figure which shows the structure of the center yoke of other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the magnetic flux is a bundle of magnetic lines of force, and the magnetic path is a path of magnetic lines of force. Further, the expression that a magnetic path is formed by magnetic flux may be replaced when a magnetic path is formed by magnetic lines of force. In the following description, the “linear generator” is simply referred to as “generator”.

  As shown in FIG. 1, the generator 1 according to the embodiment of the present invention has a center yoke 2, an outer yoke 3, and output terminals 4 a and 4 b that output generated power as external configurations. The generator 1 generates power when the center yoke 2 reciprocates (vibrates) in the outer yoke 3. In the following description, the axial direction refers to the vertical direction of the center yoke 2 or the outer yoke 3 (the horizontal direction in FIG. 1), and the circumferential direction refers to a circumferential direction centered on the axial direction. 2 or the direction along the outer periphery or inner periphery of the outer yoke 3. The “center” of the center yoke 2 means the center, and the “outer” of the outer yoke means the outside. However, there is a case where the center yoke 2 comes to the outside and the outer yoke 3 comes to the center. , “Center” and “outer” are provisional names.

  As shown in FIG. 1, the generator 1 includes a linear drive having a reciprocating cylinder 50 integrally provided with the center yoke 2 at an end of the center yoke 2 and a piston 51 fixed to another member. Set up a department. In the linear drive unit, when a gas such as air is sent from the air supply device 52 to the cylinder 50, the cylinder 50 reciprocates. As a result, the center yoke 2 connected to the cylinder 50 reciprocates.

  For example, as shown in FIG. 2, when the exhaust valve 67 of the exhaust hole 66 is closed, the exhaust valve 63 of the exhaust hole 62 is opened, and air is supplied from the air supply pipe 60 to the air supply hole 61, the piston 51 is fixed. The cylinder 50 starts to move in the left direction in FIG.

  Thereafter, as shown in FIG. 3, when the cylinder 50 further moves and the tip portion 51 a of the piston 50 passes through the exhaust hole 62, the gas in the cylinder 50 is exhausted to the outside through the exhaust hole 62. Thereby, the movement of the cylinder 50 is temporarily stopped.

  After that, as shown in FIG. 4, when the exhaust valve 63 of the exhaust hole 62 is closed, the exhaust valve 67 of the exhaust hole 66 is opened, and air is supplied from the air supply pipe 64 to the air supply hole 65, the piston 51 is fixed. The cylinder 50 starts to move in the right direction of the paper surface of FIG.

  Thereafter, as shown in FIG. 5, when the cylinder 50 further moves and the tip portion 51 a of the piston 50 passes through the exhaust hole 66, the gas in the cylinder 50 is exhausted to the outside through the exhaust hole 66. Thereby, the movement of the cylinder 50 is temporarily stopped and returned to the position shown in FIG.

  In this way, the cylinder 50 can be repeatedly reciprocated by the air supply from the air supply device 52. The structure of the cylinder 50, the piston 51, the air supply device 52, the air supply pipes 60, 64, the air supply holes 61, 65, the exhaust holes 62, 66, the exhaust valves 63, 67, etc. shown in FIGS. It is illustrated in FIG. 5 and various structures can be applied. As another example, there is an example in which the space to be sent and exhausted is not the inside of the center yoke 2 but the space between the center yoke 2 and the outer yoke 3. Note that the air supply pipes 60 and 64 are flexibly deformed (bent) as the cylinder 50 reciprocates.

  As another example of the generator 1, as shown in FIG. 6, for example, the center yoke 2 is configured to reciprocate by an arm 72 connected by a connecting portion 71 to a disk 70 rotated by an engine or the like. . The outer yoke 3 is fixed to the pedestal 73 or the like.

  FIG. 7 shows a view of the center yoke 2 and the outer yoke 3 of the generator 1 as seen from the axial direction (vibration direction). FIG. 8 shows the components of the center yoke 2 and the outer yoke 3 of the generator 1 of FIG. The state of division shown in FIG. 8 has no relation to whether or not division is actually possible, and for the convenience of explanation, shows a division method for explanation when it is easier to understand that division is explained. For example, in FIG. 7, the outer yoke 3 is divided into outer yokes 3-1, 3-2, 3-3, and 3-4 in FIG. At this time, the outer yoke 3 is actually integrally formed and may not be divided. Thus, in the following description, when it is easier to understand that each member is divided, a branch number is assigned to each member (for example, the outer yoke 3) (for example, the outer yoke 3-1, 3-2, 3). -3, 3-4) will be described. Further, if it is easier to understand the description of the eight permanent magnets 10a and 10b of the center yoke 2, it is possible to correspond to the permanent magnets 24-1 to 24-4 of the opposed outer yokes 3-1 to 3-4. The permanent magnets 10a-1 to 10a-4 and 10b-1 to 10b-4 will be described.

  As shown in FIGS. 7 and 9, the center yoke 2 of the generator 1 has permanent magnets 10a and 10b, a center core 11, a center side protruding portion 11a, and a winding portion 25b, and is formed in a cylindrical shape. . That is, the center yoke 2 has a center core 11 made of a soft magnetic material, and a plurality of rod-shaped permanent magnets 10a that are NS magnetized in the circumferential direction along the axial direction so as to be exposed on the cylindrical outer periphery a. A plurality of plate-like permanent magnets 10b that are NS magnetized in a direction perpendicular to the circumferential direction along the axial direction on the cylindrical inner circumference b, and a center side protruding portion 11a that protrudes further outward from the outer circumference a of the center core 11. And a winding portion 25b arranged on the inner peripheral side of the arrangement position of the permanent magnet 10a. The permanent magnets 10 a are arranged at a plurality of equal intervals in the circumferential direction of the center yoke 2. In this embodiment, four permanent magnets 10a are arranged. In addition, the permanent magnet 10a is arrange | positioned so that the pole which the adjacent permanent magnet 10a opposes may become the same pole. The permanent magnets 10b are arranged at equal intervals in the circumferential direction of the inner circumference b of the center yoke 2. In this embodiment, four permanent magnets 10b are arranged. In addition, the permanent magnet 10b is arrange | positioned so that the magnetization direction may be opposite in the adjacent permanent magnet 10b, and the arrangement position of the permanent magnet 10a and the arrangement position of the permanent magnet 10b may be alternated.

  The center yoke 2 has a plurality of center cores 11 arranged at equal intervals in the circumferential direction when viewed from the axial direction, and each center core 11 is arranged in parallel at equal intervals in the axial direction and along the circumferential direction. And it has the some center side protrusion part 11a which protrudes to radial direction outward from the outer periphery a. The center yoke 2 has a hollow portion 12 at the center, and the inner wall of the hollow portion 12 is the inner periphery b. The hollow portion 12 is provided to reduce the mass of the center yoke 2 for efficient reciprocation. In the hollow portion 12, the permanent magnet 10b and the winding portion 25b described above are arranged. Therefore, it is preferable that the portion of the cavity portion 12 where the permanent magnet 10b and the winding portion 25b are not disposed is left as it is, but the portion is light and non-magnetic such as a light metal such as aluminum or a synthetic resin. It may be filled with the material.

  As shown in FIG. 7, the outer yoke 3 of the generator 1 has a through hole 20 through which the center yoke 2 passes. The outer yoke 3 has a cylindrical shape made of a soft magnetic material, and has a plurality of nonmagnetic material portions 21 along the axial direction at equal angles around the axis. In this embodiment, the nonmagnetic part 21 is a hollow part, and the winding part 25a is arranged. Further, the outer yoke 3 has a plurality of groove portions 22 respectively extending from the inner circumference b1 to the nonmagnetic body portion 21. Further, the outer yoke 3 has a plurality of outer cores 23 made of a soft magnetic material divided into four parts in this embodiment when viewed from the axial direction, and faces the center side protruding portion 11a of the center yoke 2 in the axial direction. A plurality of outer side protrusions 23a are arranged in parallel at equal intervals and along the circumferential direction and project radially inward from the inner circumference b1. By forming the center-side protruding portion 11a and the outer-side protruding portion 23a as described above, it is possible to increase the magnetic flux density and increase the attractive force.

  The outer-side protruding portion 23a shown in FIG. 7 is arranged with a half-pitch shift at an intermediate point in the circumferential direction between one groove portion 22 and the groove portion 22 located adjacent to the groove portion 22. That is, as shown in FIG. 8, when the outer yoke 3 is divided into four parts and indicated as outer yokes 3-1, 3-2, 3-3, 3-4, the outer side protruding portions of the outer yokes 3-1 and 3-3. 23a-1 and 23a-3 (for example, type A) and the outer side protrusions 23a-2 and 23a-4 (for example, type B) of the outer yokes 3-2 and 3-4, when viewed in the axial direction, the outer side The position of the protrusion 23a is shifted by a half pitch.

  This half-pitch state will be described in more detail with reference to FIGS. FIG. 10 is a perspective view of the outer yokes 3-1 and 3-3 that are type A, and FIG. 11 is a perspective view of the outer yokes 3-2 and 3-4 that are type B. As can be seen from FIGS. 10 and 11, for example, the uppermost outer side protrusion 23 a-1 and the outer side protrusion 23 a-3 in FIG. 10 are exposed outward, while the uppermost upper side protrusion 23 a-3 in FIG. The outer side protrusions 23a-2 and 23a-4 are positioned not on the outer side, but on the inner side, and when viewed in the axial direction, the outer side protrusions 23 are arranged with a half pitch shift. It becomes a state. As described above, since the center yoke 2 vibrates in the axial direction, the outer yoke 3 has an outer side protruding portion 23a that is shifted by a half pitch in the axial direction in order to prevent cogging from occurring. Yes.

  Further, as shown in FIGS. 7 and 8, the outer yoke 3 is provided with a permanent magnet 24 extending in the axial direction in the groove portion 22. The permanent magnet 24 is arranged so as to face the permanent magnet 10a of the center side yoke 2, and is NS magnetized so that the polarities thereof are opposite to each other when viewed in the circumferential direction. Further, the outer yoke 3 has a winding portion 25 a that is wound around the nonmagnetic body portion 21. After forming the winding portion 25a, the nonmagnetic body portion 21 may be filled with a nonmagnetic material such as a synthetic resin.

  For example, the center core 11 and the center side protrusion 11a of the center yoke 2 are manufactured by integral molding, and the outer core 23 and the outer side protrusion 23a of the outer yoke 3 are manufactured by integral molding. The permanent magnets 10a and 10b are bonded to the center core 11, and the permanent magnet 24 is bonded to the outer core 23. Depending on the material of the center core 11 and the outer core 23, the permanent magnets 10a and 10b and the center core 11 are formed by insert molding or outsert molding. The permanent magnet 24 and the outer core 23 may be insert-molded or outsert-molded.

  12 shows a state (solid line) in which one of the center side protruding portions 11a of the center yoke 2 is developed in the circumferential direction from the dividing point of the outer yoke 3-1 and the outer yoke 3-2 shown in FIG. The outer side protrusions 23a-1, 23a-2, 23a-3, and 23a-4 (broken lines) of the outer yoke 3 facing the portion 11a are schematically shown. A white arrow in FIG. 12 indicates a direction in which the center yoke 2 moves in the outer yoke 3.

  In the following description, for convenience of explanation, based on the state shown in FIG. 12, the portion where the center side protruding portion 11a can face the outer side protruding portion 23a-2 is defined as the first stage of the center side protruding portion 11a. The portion where the side protruding portion 11a can face the outer side protruding portion 23a-3 is the second step of the center side protruding portion 11a, and the portion where the center side protruding portion 11a can face the outer side protruding portion 23a-4 protrudes from the center side. The portion of the center-side protruding portion 11a is divided into the third step of the portion 11a, and the portion where the center-side protruding portion 11a can face the outer-side protruding portion 23a-1 is referred to as the fourth step of the center-side protruding portion 11a. I will explain.

  FIG. 13 shows a state S1 in which the second stage of the center side protruding part 11a faces the outer side protruding part 23a-3 and the fourth stage of the center side protruding part 11a faces the outer side protruding part 23a-1. Show. At this time, the outer side protrusions 23a-2 and 23a-4 do not face the center side protrusion 11a.

  In the state S1, as shown in FIG. 14, the second stage of the center-side protruding part 11a, the outer-side protruding part 23a-3 facing this, and the fourth stage of the center-side protruding part 11a, The mutual attractive force is maximized between the opposing outer-side protrusions 23a-1. On the contrary, in the state S1, as shown in FIG. 14, the first stage of the center side protruding part 11a, the outer side protruding part 23a-2 that is not opposed thereto, and the third stage of the center side protruding part 11a The suction force between the outer projecting portions 23a-4 that are not opposed to each other is minimized.

  In this state S1, since the center side protruding portion 11a and the outer side protruding portions 23a-1, 23a-3 are opposed to each other, the magnetic fluxes of the permanent magnets 10a-1 and 10a-3 of the center yoke 2 are It becomes easy to be attracted by the permanent magnets 24-1 and 24-3, and the N pole of the permanent magnet 10a-1 → the S pole of the permanent magnet 24-1 → the N pole of the permanent magnet 24-1 → the S pole of the permanent magnet 10a-1. The magnetic path M1 and the N magnetic pole of the permanent magnet 10a-3 → the S pole of the permanent magnet 24-3 → the N pole of the permanent magnet 24-3 → the S magnetic pole M2 of the permanent magnet 10a-3 are formed in a strong state. Is done. Further, in the state S1, the magnetic fluxes of the permanent magnets 10a-2 and 10a-4 of the center yoke 2 are such that the nearby center side protruding portion 11a does not face the outer side protruding portions 23a-2 and 23a-4. The protrusion is sucked by the protrusion at the adjacent position where the protrusion is partially opposed. That is, since the magnetic fluxes of the permanent magnets 10a-2 and 10a-4 are attracted to the permanent magnets 24-1 and 24-3 of the outer yoke 3, the N pole of the permanent magnet 10a-4 → the S pole of the permanent magnet 24-1 → permanent. The magnetic paths M3 and M4 of the N pole of the magnet 24-1, the S pole of the permanent magnet 10a-2, the N pole of the permanent magnet 10a-2, the S pole of the permanent magnet 24-3, and the S pole of the permanent magnet 10a-4. It is formed. Further, the magnetic fluxes of the permanent magnets 10a-2 and 10a-4 form magnetic paths M7b and M8b around themselves, in addition to the formation of the magnetic paths M3 and M4. At this time, the magnetic flux density of the magnetic paths M7b and M8b is larger than the magnetic flux density of the magnetic paths M3 and M4.

  The magnetic fluxes of the permanent magnets 10b-1 and 10b-2 are added to the magnetic flux of the permanent magnet 10a-2. Moreover, the magnetic flux of permanent magnet 10b-2, 10b-3 is added to the magnetic flux of permanent magnet 10a-3. Moreover, the magnetic flux of permanent magnet 10b-3, 10b-4 is added to the magnetic flux of permanent magnet 10a-4. Moreover, the magnetic flux of permanent magnet 10b-4, 10b-1 is added to the magnetic flux of permanent magnet 10a-1.

  Further, in the state S1, the outer side protrusions 23a-2 and 23a-4 are not opposed to the center side protrusion 11a, so that the permanent magnets 24-2 and 24-4 in the outer yokes 3-2 and 3-4 The magnetic flux does not exit from the outer yokes 3-2 and 3-4, and forms a magnetic path M5 that passes through the winding portion 25a-2 and a magnetic path M6 that passes through the winding portion 25a-4.

  If attention is paid to the magnetic flux density related to the winding portions 25a-1 and 25a-3 in the state S1, the magnetic flux density related to these winding portions 25a-1 and 25a-3 is attracted to the center yoke 2 side. To be minimal. On the other hand, paying attention to the magnetic flux densities of the winding portions 25a-2 and 25a-4 in the state S1, the magnetic flux densities of these winding portions 25a-2 and 25a-4 are the magnetic fluxes of the magnetic paths M5 and M6, respectively. The degree of exiting from the outer yokes 3-2 and 3-4 is very small, and each magnetic flux density is maximized.

  When attention is paid to the magnetic flux density related to the winding portions 25b-1, 25b-2, 25b-3, and 25b-4 in the state S1, the magnetic flux of the permanent magnets 10a-1 and 10a-3 is the permanent magnet 24-1. , 24-3, the magnetic flux passing through the winding portions 25b-1, 25b-3 is almost negligible. On the other hand, the magnetic flux density related to the winding portion 25b-2 and the winding portion 25b-4 becomes maximum because the magnetic paths M7b and M8b pass through the winding portions 25b-2 and 25b-4, respectively.

  Subsequently, in the state S2, as shown in FIG. 15, all the outer side protrusions 23a-1 to 23a-4 are equally opposed to the center side protrusion 11a. However, the opposing area of the center side protrusion 11a and the outer side protrusions 23a-1 to 23a-4 is half of the area of each of the outer side protrusions 23a-1 to 23a-4. According to this, as shown in FIG. 16, magnetic paths M10, M11, M12, and M13 with a small magnetic flux are formed between the outer yokes 3-1 and 3-3 and the center yoke 2. The magnetic path M10 corresponds to the magnetic path M1 shown in FIG. 14, the magnetic path M11 corresponds to the magnetic path M2, the magnetic path M12 corresponds to the magnetic path M3, and the magnetic path M13 corresponds to the magnetic path M4. At this time, magnetic paths M18 and M19 passing through the winding portions 25b-1 and 25b-3 are formed in the permanent magnets 10a-1 and 10a-3. Further, as shown in FIG. 16, magnetic paths M <b> 14, M <b> 15, M <b> 16, M <b> 17 with a small magnetic flux are formed between the outer yokes 3-2 and 3-4 and the center yoke 2. The magnetic paths M14, M15, M16, and M17 have substantially the same strength as the magnetic paths M10, M11, M12, and M13. At this time, magnetic paths M7c and M8c passing through the winding portions 25b-2 and 25b-4 are formed in the permanent magnets 10a-2 and 10a-4. The magnetic flux density of the magnetic paths M7c and M8c is smaller than the magnetic flux density of the magnetic paths M7b and M8b shown in FIG. The magnetic flux densities of the magnetic paths M18, M19, M7c, and M8c are almost the same.

  When attention is paid to the magnetic flux densities related to the winding portions 25a-1 to 25a-4 in the state S2, the magnetic flux densities related to these winding portions 25a-1 to 25a-4 become substantially equal. As a result, the magnetic flux densities of the winding portions 25a-1 and 25a-3 that were the maximum magnetic flux density in the state S1 are reduced, and the winding portions 25a-2 and 25a-4 that were the minimum magnetic flux density in the state S1. The magnetic flux density increases. That is, the magnetic paths M5 and M6 become magnetic paths M5a and M6a having about half the magnetic flux intensity, and are new magnetic paths in the winding portions 25a-1 and 25a-3, and have the same magnetic flux as the magnetic paths M5a and M6a. Magnetic paths M7a and M8a having a density are formed.

  When attention is paid to the magnetic flux density of the winding portions 25b-1, 25b-2, 25b-3, and 25b-4 in the state S2, the magnetic path M18 passes through the winding portion 25b-1, and the windings The magnetic path M7c passes through the part 25b-2, the magnetic path M19 passes through the winding part 25b-3, and the magnetic path M8c passes through the winding part 25b-4. In the state S2, the magnetic flux density passing through the winding portions 25b-1 to 25b-4 is substantially the same. That is, the magnetic flux density of the winding portions 25b-2 and 25b-4 that was the maximum in the state S1 decreases in the state S2, and the magnetic flux density of the winding portions 25b-1 and 25b-3 that was the minimum in the state S1. The density increases in state S2. Thereby, in the state S2, the magnetic flux densities passing through the winding portions 25b-1 to 25b-4 are substantially the same.

  Further, FIG. 17 shows a state in which the first step of the center side protruding portion 11a faces the outer side protruding portion 23a-2, and the third step of the center side protruding portion 11a faces the outer side protruding portion 23a-4. Is shown. At this time, the outer side protrusions 23a-1 and 23a-3 do not face the center side protrusion 11a.

  In such a state S3, as shown in FIG. 18, between the first and third steps of the center-side protruding portion 11a and the outer-side protruding portions 23a-2 and 23a-4 opposed thereto. , Mutual attraction is maximized. For this reason, the magnetic path M14 becomes a magnetic path M20 having a strong magnetic flux density, and similarly, the weak magnetic path M15 becomes a strong magnetic path M21. On the contrary, in the state S3, as shown in FIG. 18, between the second and fourth steps of the center side protruding portion 11a and the outer side protruding portions 23a-1 and 23a-3 that are not opposed thereto. , Mutual suction force is minimized. This state S3 is a state in which the state S1 is rotated 90 degrees at the mechanical angle. Further, this state S3 is a state in which the state S1 is electrically advanced by 180 degrees.

  When attention is paid to the magnetic flux density related to the winding portions 25a-2 and 25a-4 in the state S3, the magnetic flux related to these winding portions 25a-2 and 25a-4 is attracted to the center yoke 2 side. Therefore, it is minimized (not shown in FIG. 18). On the other hand, paying attention to the magnetic flux density related to the winding portions 25a-1 and 25a-3 in the state S3, the center side protruding portion 11a and the outer side protruding portions 23a-1 and 23a-3 are not opposed to each other. Since the magnetic flux of -1 and 24-3 leaks very little from the outer yokes 3-1 and 3-3, the magnetic flux density of the winding portions 25a-1 and 25a-3 is maximized. At this time, the magnetic path M7a having a weak magnetic flux density becomes a magnetic path M7 having a strong magnetic flux density, and similarly, the weak magnetic path M8a becomes a strong magnetic path M8.

  When attention is paid to the magnetic flux density of the winding portions 25b-1, 25b-2, 25b-3, and 25b-4 in the state S3, the magnetic flux of the permanent magnets 10a-2 and 10a-4 is equal to the permanent magnet 24-2. , 24-4, the magnetic flux passing through the winding portions 25 b-2 and 25 b-4 is almost negligible. On the other hand, the magnetic flux density related to the winding part 25b-1 and the winding part 25b-3 is maximized because the magnetic paths M26 and M27 pass through the winding parts 25b-1 and 25b-3, respectively.

  As described above with reference to FIGS. 13 to 18, the center yoke 2 moves in the outer yoke 3 in the direction of the white arrow in FIG. 12 (that is, from right to left in FIG. 12). The magnetic flux density of ˜25a-4, 25b-1 to 25b-4 repeats between the minimum and maximum. As a result, current is generated in the winding portions 25a-1 to 25a-4 and 25b-1 to 25b-4 in a direction that hinders the change in magnetic flux density. Similarly, when the center-side protruding portion 11 that has reached the left end in FIG. 12 moves from the left to the right in FIG. 12, the winding portions 25a-1 to 25a-4, 25b-1 to 25b-4 are similarly applied. The magnetic flux density is repeated between the minimum and maximum. As a result, current is generated in the winding portions 25a-1 to 25a-4 and 25b-1 to 25b-4 in a direction that hinders the change in magnetic flux density. As the center yoke 2 reciprocates in the outer yoke 3 in this way, the generator 1 can continuously generate power.

  FIG. 19 shows the positional relationship between the center side protruding portion 11a of the center yoke 2 and the outer side protruding portions 23a-1 to 23a-4 of the outer yoke 3, and the above-described states S1, S2, and S3 are changed from S1 → S2 → S3. This process is shown along with the passage of time t1 to t5. FIG. 20 shows the state of current generated in the winding portions 25a-1 and 25a-2 and the winding portions 25b-1 and 25b-2 of the generator 1 at the respective times t1 to t5 shown in FIG. Is shown. The current waveforms of the winding portions 25a-3 and 25b-3 are the same as those of the winding portions 25a-1 and 25b-1, and the current waveforms of the winding portions 25a-4 and 25b-4 are the winding portions. Since it is the same as 25a-2 and 25b-2, description is abbreviate | omitted. As shown in FIG. 19, when the center yoke 2 moves in the outer yoke 3 at a constant speed, as shown in FIG. 20, the winding portions 25a-1, 25b-1, 25a-2, 25b-2 Generates a sinusoidal current waveform.

  For example, in FIG. 19, time t1 corresponds to state S1 shown in FIG. At time t1, the second stage of the center side protruding portion 11 of the center yoke 2 and the outer side protruding portion 23-3 of the outer yoke 3 face each other, and the magnetic flux density around the winding portions 25a-2 and 25b-2 is maximum. And then decreases. For this reason, in the winding portions 25a-2 and 25b-2, a current that generates magnetic lines of force in a direction that prevents the change starts to flow in a certain direction through the wire. If this direction is positive, positive current starts to flow. This point is shown as W11 in FIG. On the other hand, since the magnetic flux density around the winding portions 25a-1 and 25b-2 is minimized and then increases, a current that generates magnetic lines of force in a direction that prevents the change flows through the wire. The flowing direction is opposite to the winding portions 25a-2 and 25b-2. This direction is negative with respect to the above-mentioned positive. This point is shown as W21 in FIG. At this time, the second stage of the center side protruding portion 11 of the center yoke 2 generates the maximum suction force with the outer side protruding portion 23a-3 of the outer yoke 3.

  Therefore, at time t1, as shown in FIG. 20, in the winding portions 25a-1, 25b-1, 25a-2, and 25b-2, the direction of current flow is reversed, so that the AC curve is positive or negative. It becomes the middle point. That is, at time t1, as shown in FIG. 20, no positive current or negative current is generated in the winding portions 25a-1, 25b-1, 25a-2, 25b-2 (the minimum current value). = 0 amps).

  In FIG. 20, the time t5 corresponds to the state S3 shown in FIG. At time t5, the first stage of the center side protruding portion 11 of the center yoke 2 and the outer side protruding portion 23-2 of the outer yoke 3 face each other, and the magnetic flux density around the winding portions 25a-2 and 25b-2 is minimized. And then increase. For this reason, in the winding portions 25a-2 and 25b-2, a current that generates magnetic lines of force in a direction that prevents the change starts to flow in a certain direction through the wire. This direction is positive if the above criteria are followed. This point is shown as W12 in FIG. On the other hand, the magnetic flux density around the winding portions 25a-1 and 25b-1 is maximized and then decreases. For this reason, the electric current which produces the magnetic force line of the direction which prevents the change flows into a coil | winding part 25a-1 and 25b-1. The flowing direction is opposite to the winding portions 25a-2 and 25b-2. This direction is negative with respect to the above-mentioned positive. This point is shown as W22 in FIG. At this time, the first stage of the center side protruding portion 11 of the center yoke 2 generates the maximum suction force with the outer side protruding portion 23-2 of the outer yoke 3.

  Therefore, at time t5, as shown in FIG. 20, a maximum current (W12) on the plus side is generated in winding portions 25a-2 and 25b-2, and in winding portions 25a-1 and 25b-1, A negative-side maximum value (W22) current is generated.

  Time t3 corresponds to state S2 shown in FIG. At time t3, half of the center side protruding portion 11 of the center yoke 2 and half of the outer side protruding portions 23-1 to 23-4 of the outer yoke 3 face each other. Time t3 is an intermediate point in the process of transition from state S1 to state S3. Therefore, at time t3, as shown in FIG. 20, in the winding portions 25a-1, 25b-1, 25a-2, 25b-2, the maximum value and the minimum value (= 0 amperes) on the positive side and the negative side. A current having an approximately intermediate value is generated.

  Times t2 and t4 are processes of transition from states S1 to S2 and from S2 to S3, respectively. Therefore, at time t2, as shown in FIG. 20, in winding portions 25a-1, 25b-1, 25a-2, and 25b-2, current values (0 amperes) generated in state S1 and states S2 are generated, respectively. A current having an intermediate value with respect to the current value is generated. Further, at time t4, as shown in FIG. 20, in the winding portions 25a-1, 25b-1, 25a-2, 25b-2, the current value generated in the state S2 and the current value generated in the state S3 ( A current having an intermediate value with respect to the maximum value is generated.

  In this way, at times t1 to t5, a current corresponding to one quarter of the sinusoidal current waveform generated in the winding portions 25a-1, 25b-1, 25a-2, and 25b-2 is generated. To do. That is, when the center yoke 2 of the generator 1 is moving at a constant speed, the winding portions 25a-1, 25b-1, 25a-2, 25b- are four times as long as the times t1 to t5. One cycle of the sinusoidal current waveform generated at 2 is completed.

  In addition, description of winding part 25a-1, 25b-1, 25a-2, 25b-2 mentioned above is based on winding part 25a-1, 25b-1, winding part 25a-3, 25b-3, winding. The same applies when the portions 25a-2 and 25b-2 are replaced with the winding portions 25a-4 and 25b-4, respectively.

  Therefore, the winding portions 25a-1 and 25a-3 generate currents having the same strength in the same direction, and the winding portions 25a-2 and 25a-4 are different from the winding portions 25a-1 and 25a-3. Although the directions are opposite, currents having the same strength are generated in the same direction. Therefore, by appropriately connecting the winding portions 25a-1 to 25a-4 and 25b-1 to 25b-4 so as to obtain a current in the same direction, the output terminals 4a and 4a shown in FIGS. The generator 1 can generate electric power by outputting from 4b. Further, if necessary, two currents having different 180 degree cycles may be taken out.

  Here, considering the cause of cogging in a general linear power generator, the attraction force or repulsive force between the center yoke 2 side and the outer yoke 3 side varies depending on the position of the center yoke. is there. On the other hand, in the generator 1, the facing area between the protruding portions does not change at any time from the time t1 to the time t5. That is, regardless of the positional relationship between the center yoke 2 and the outer yoke 3, the facing area between the center side protruding portion 11a of the center yoke 2 and the outer side protruding portions 23a-1 to 23a-4 of the outer yoke 3 is always constant, and the center The facing area between the side protruding portion 11a and the non-projecting portion of the outer yoke 3 is always constant. For this reason, the attractive force between the center yoke 2 and the outer yoke 3 is always constant.

  For example, at time t1 (state S1), the second and fourth stages of the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-3 and 23a-1 of the outer yoke 3 are the outer side protrusions. Opposing at the maximum area of 23a-1 and 23a-3 and attracting with the maximum suction force. On the other hand, the outer side protrusions 23 a-2 and 23 a-4 of the outer yoke 3 do not face part of the center side protrusion 11 a of the center yoke 2, and the suction force is minimum. Accordingly, the strength of the suction force between the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-1 to 23a-4 of the outer yoke 3 is the same as that of the center side protrusion 11a of the center yoke 2 and the outer yoke 3. It can be considered that it depends on the sum of the strength of the opposing area portion and the strength of the non-opposing area portion between the outer side protruding portions 23a-1 to 23a-4.

Therefore, the maximum value of the area when the outer side protrusions 23a-1 to 23a-4 of the outer yoke 3 face the center side protrusion 11a of the center yoke 2 is Qcm ² (square centimeter), and the suction force per 1 cm ² unit is Assuming that the strength is P1, at the time t1, the facing area between the second stage of the center side protruding portion 11a of the center yoke 2 and the outer side protruding portion 23a-3 of the outer yoke 3 is Qcm ² and the suction force is Q ×. P1. Further, the facing area between the fourth step of the center side protruding portion 11a of the center yoke 2 and the outer side protruding portion 23a-1 of the outer yoke 3 is also Qcm ² , and the suction force is Q × P1. Further, the non-facing area between the first step of the center side protruding portion 11 a of the center yoke 2 and the outer side protruding portion 23 a-2 of the outer yoke 3 and the third step of the center side protruding portion 11 a of the center yoke 2 and the outer yoke 3. The non-facing area between the outer projecting portion 23a-4 and the outer projecting portion 23a-4 is Qcm ² , and the suction force per 1 cm ² unit of the non-facing portion is P2, and the suction force is Q × P2. Therefore, the attractive force of the projecting portions 11a and 23a-1 to 23a-4 between the center yoke 2 and the outer yoke 3 at time t1 is “2Q × P1 + 2Q × P2 = 2Q (P1 + P2)”.

  Similarly, at time t2, the first and third quarters of the center-side protrusion 11a of the center yoke 2 in the circumferential direction and the outer-side protrusions 23a-2 and 23a-4 of the outer yoke 3 A quarter of the circumferential direction is opposed to the second and third quarters of the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-3 and 23a-1 of the outer yoke 3. Three quarters of the circumferential direction face each other and attract each other.

Here, the facing areas between the first and third steps of the center side protruding portion 11a of the center yoke 2 and the outer side protruding portions 23a-2 and 23a-4 of the outer yoke 3 are respectively (1/4) Qcm ^2. The opposing areas between the second and fourth steps of the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-3 and 23a-1 of the outer yoke 3 are (3/4) Qcm ² , respectively. . Therefore, the sum of the suction forces of the opposing portions of the projecting portions 11a, 23a-1 to 23a-4 between the center yoke 2 and the outer yoke 3 at time t2 is
(1/4) Qcm ² × P1 + (1/4) Qcm ² × P1 + (3/4) Qcm ² × P1 + (3/4) Qcm ² × P1
= (8/4) Qcm ² × P1
= 2Qcm ² × P1
It is. On the other hand, the suction force of the non-facing portion is calculated in the same manner and becomes 2Qcm ² × P2. Accordingly, the suction force at time t2 is “2Q × P1 + 2Q × P2 = 2Q (P1 + P2)” as at time t1.

  Similarly, at time t3, a half in the circumferential direction of the center side protruding portion 11a of the center yoke 2 and a half in the circumferential direction of the outer side protruding portions 23a-1 to 23a-4 of the outer yoke 3 Are facing each other and attracting each other strongly.

Here, the opposing areas between the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-1 to 23a-4 of the outer yoke 3 are (1/2) Qcm ² , respectively. Therefore, the sum of the suction forces of the opposing portions of the projecting portions 11a, 23a-1 to 23a-4 between the center yoke 2 and the outer yoke 3 at time t3 is
(1/2) Qcm ² × P1 + (1/2) Qcm ² × P1 + (1/2) Qcm ² × P1 + (1/2) Qcm ² × P1
= (4/2) Qcm ² × P1
= 2Qcm ² × P1
It is. On the other hand, the area of the suction force of the non-opposing portion, that is, the portion where the outer side protruding portion 23a-1 to 23a-4 of the outer yoke 3 is not opposed to the center side protruding portion 11a of the center yoke 2 is 2Qcm ² . Therefore, 2Qcm ² × P2. Therefore, the total sum of the attractive forces at time t3 is 2Q (P1 + P2), similar to times t1 and t2.

  Similarly, at the time t4, the first and third thirds of the center-side protruding portion 11a of the center yoke 2 in the circumferential direction and the outer-side protruding portions 23a-2 and 23a-4 of the outer yoke 3 3/4 of the circumferential direction opposes, and the second and fourth quarters of the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-3 and 23a of the outer yoke 3 are arranged. −1 in the circumferential direction of −1 face each other and strongly attract each other.

Here, the opposing areas between the first and third steps of the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-2 and 23a-4 of the outer yoke 3 are (3/4) Qcm, respectively. ² and the opposing areas between the second and fourth steps of the center side protrusion 11a of the center yoke 2 and the outer side protrusions 23a-3 and 23a-1 of the outer yoke 3 are (1/4) respectively. Qcm ² . Therefore, the total area of the portions of the projecting portions 11a, 23a-1 to 23a-4 that are completely opposed to each other between the center yoke 2 and the outer yoke 3 at time t4 is:
(3/4) Qcm ² + (3/4) Qcm ² + (1/4) Qcm ² + (1/4) Qcm ²
= (8/4) Qcm ²
= 2Qcm ²
It is. Therefore, the suction force due to the protrusions facing each other is “2Q × P1”. On the other hand, the area of the non-facing portion where the center side protruding portion 11a of the center yoke 2 does not face the outer side protruding portions 23a-1 to 23a-4 of the outer yoke 3 is 2Qcm ² , and the entire suction force is the time t1, Similar to t2 and t3, “2Q (P1 + P2)”.

Similarly, at time t5 (state S3), the first and third steps of the center side protruding portion 11a of the center yoke 2 and the outer side protruding portions 23a-2 and 23a-4 of the outer yoke 3 face each other. Although strongly attracting each other, the outer side protrusions 23 a-3 and 23 a-1 of the outer yoke 3 do not face the center side protrusion 11 a of the center yoke 2. At this time, the facing areas between the first and third steps of the center side protruding portion 11a of the center yoke 2 and the outer side protruding portions 23a-2 and 23a-4 of the outer yoke 3 are respectively Qcm ² . Therefore, the sum of the areas of the portions of the projecting portions 11a, 23a-1 to 23a-4 that are completely opposed to each other between the center yoke 2 and the outer yoke 3 at time t5 is
Qcm ² + Qcm ² = 2Qcm ²
It is. Therefore, the suction force due to the protrusions facing each other is “2Q × P1”. On the other hand, the area of the non-opposing portion where the second step and the fourth step of the center side protruding portion 11a of the center yoke 2 do not face the outer side protruding portions 23a-3 and 23a-1 of the outer yoke 3 is also 2Qcm ² . The entire suction force is “2Q (P1 + P2)” at times t1, t2, t3, and t4.

Thus, at any time from time t1 to time t5 in FIG. 19, the total of the attractive forces at the protrusions 11a, 23a-1 to 23a-4 between the center yoke 2 and the outer yoke 3 is “2Qcm ^2. × (P1 + P2) ”, which is unchanged. The current waveform generated at times t1 to t5 is a current waveform corresponding to a quarter of the sinusoidal current waveforms generated at the winding portions 25a-1 to 25a-4 and 25b-1 to 25b-4. However, the sine wave is one in which the current waveform for one quarter period is continuous while changing the positive and negative directions. Therefore, the center-side protruding portion 11a of the center yoke 2 and the outer-side protruding of the outer yoke 3 in any part of the sinusoidal current waveform generated in the winding portions 25a-1 to 25a-4 and 25b-1 to 25b-4. It is obvious that the suction force between the portions 23a-1 to 23a-4 is always constant. This means that the attractive force between the center yoke 2 and the outer yoke 3 is always constant regardless of the positional relationship between the center yoke 2 and the outer yoke 3. Thus, it can be seen that no cogging occurs in the generator 1.

  Further, in the generator 1 in which cogging does not occur in this way, the reciprocating motion (vibration) applied to the center yoke 2 from the outside is not reduced by the cogging torque, and most of it is used as torque for power generation. Therefore, highly efficient power generation can be performed.

(Other embodiments)
The above-described embodiment can be variously modified without departing from the gist thereof. For example, the hollow portion 12 and the nonmagnetic body portion 21 may not be hollow, and may be configured to embed a nonmagnetic body such as aluminum or a resin material. Further, although the description has been given assuming that the protrusions 11a, 23a-1 to 23a-4 are integrally formed with the main body of the center yoke 2 and the outer yoke 3, the protrusions 11a, 23a-1 to 23a-4 are integrally formed. Instead, it may be fixed to each main body by bonding or the like as a separate member.

  In the above-described embodiment, the outer side protrusions 23a-1 and 23a-3 and the outer side protrusions 23a-2 and 23a-4 of the outer yoke 3 are described as being shifted from each other by a half pitch. On the other hand, the center side protruding portion 11a of the center yoke 2 is shifted by a half pitch in the axial direction with the permanent magnet 10 as a boundary, and the pitch shift of the outer side protruding portions 23a-1 to 23a-4 of the outer yoke 3 is eliminated. May be. This also achieves the same operations and effects as the above-described embodiment.

  Further, the axial length of the center yoke 2 shown in FIG. 9 and the axial length of the outer yoke 3 shown in FIGS. 10 and 11 are not limited to this. That is, the minimum length in the axial direction is one stage of either the center side protrusion 11a of the center yoke 2 or the outer side protrusion 23a of the outer yoke 3, and two stages when the other is shifted by a half pitch. If it is a structure, the generator 1 can be comprised.

  Further, a plurality of winding portions 25a-1 to 25a-4 and 25b-1 to 25b-4 may be provided in parallel in the axial direction. That is, as described above, a set of winding portions 25a-1 to 25a-4 may be provided for the minimum axial length of the generator 1, and these may be stacked in a plurality of stages. According to this, the power generation amount can be changed according to the number of stages (length). Similarly, a set of winding portions 25b-1 to 25b-4 is provided for the minimum axial length of the generator 1, and these are stacked in a plurality of stages toward the inside of the center yoke 2. Also good. According to this, the power generation amount can be changed according to the number of stages (length).

  Moreover, although the above-mentioned generator 1 was demonstrated as the center yoke 2 reciprocating (vibrating), the center yoke 2 may be fixed and the outer yoke 3 may reciprocate. The center yoke 2 and the outer yoke 3 are preferably soft magnetic materials, but may be simple magnetic materials. Further, when the outer core 23 and the permanent magnet 24 are integrally formed by insert molding or the like, the groove portion 22 is not formed, but the corresponding portion including the case of such integral formation is referred to as a groove portion.

  Moreover, as shown in FIG. 21, the generator 1A which does not have a permanent magnet can also be comprised in the outer yoke 3A. That is, the generator 1 </ b> A uses the groove 22 after removing the permanent magnet 24 from the outer yoke 3 of the generator 1 as a non-magnetic member. Note that the space after the permanent magnet 24 is removed from the outer yoke 3 may be filled with resin or aluminum which is a non-magnetic material. The generator 1A operates in the same manner as the generator 1 according to the above-described embodiment. However, since the outer yoke 3A does not have a permanent magnet, the current waveform is shown by the winding portions 25a-1 and 25a-2. Inverted from those shown in FIG.

  For example, the state shown in FIG. 21 corresponds to the state S1 shown in FIG. Considering the state of the generator 1 in the state S1 shown in FIG. 14, the generator 1 has the permanent magnet 24-1 in the outer yoke 3-1. Since the magnetic flux is attracted to the side, the magnetic flux density passing through the winding portion 25a-1 is minimized. On the other hand, in the generator 1A, since there is no permanent magnet in the outer yoke 3-1, the permanent magnet 10- is interposed via the outer side protrusion 23a-1 facing the magnetic flux of the permanent magnet 10-1 of the center yoke 2. The magnetic path M30 into which the magnetic flux from 1 enters the outer yoke 3-1 side is formed. This maximizes the magnetic flux density around the winding portion 25a-1. Similarly, a magnetic path M31 is formed by the magnetic flux from the permanent magnet 10-3. Furthermore, magnetic paths M32 and M33 are formed by the magnetic flux from the permanent magnets 10-2 and 10-4.

  Thus, when the generator 1 and the generator 1A are compared, it can be seen that the maximum and minimum states of the magnetic flux density in the winding portion 25a-1 are reversed. The same applies to the other winding portions 25a-2 to 25a-4. Therefore, the current waveform shown in FIG. 20 is reversed between the generator 1 and the generator 1A. On the other hand, the maximum and minimum state of the magnetic flux density passing through the winding portions 25b-1 to 25b-4 is the same as that of the generator 1. Therefore, the winding portions 25b-1 and 25b-2 have the same waveforms as those shown in FIG.

  Further, as shown in FIG. 22, the center yoke 2 may be provided with a connecting portion 11b for connecting the center core 11 adjacent to the portion into which the permanent magnet 10a enters. Similarly, a connecting portion that connects the outer core 23 may be provided in the groove portion 22 of the outer yoke 3. Furthermore, although the permanent magnets 10a and 24 are arranged at equal intervals, it is preferable to arrange them so that the magnets face each other. Therefore, the permanent magnets 10a and 24 are arranged at non-equal intervals, and the permanent magnet 10a and the permanent magnet 24 face each other. You may arrange so that. In addition, the permanent magnet 10a and the permanent magnet 24 are preferably disposed so as to be completely opposed to each other, but may be disposed slightly deviated from each other.

  Further, in each of the above-described embodiments, the center yoke 2 having the winding portion 25b is an inner type in which the center yoke 2 relatively moves in the outer yoke 3 having the winding portion 25a. However, the portion having the winding portion 25a is the inner side. It is good also as an outer type. In this case, the center yoke 2 moves relative to the outside of the outer yoke 3.

  Further, in each embodiment, one winding portion 25a is arranged for each nonmagnetic body portion 21, but the number of winding portions 25a may be an appropriate number. For example, in the generator 1 of the first embodiment, only one winding portion 25a-1 is provided, only two winding portions 25a-1, 25a-3 are provided, two winding portions 25a-1, Or only 25a-2. Furthermore, two winding portions may be provided on one nonmagnetic body portion 21. Similarly, in each embodiment, one winding portion 25b is arranged for each permanent magnet 10a, but the number of winding portions 25b may be an appropriate number. For example, in the generator 1 of the first embodiment, only one winding part 25b-1, only two winding parts 25b-1, 25b-3, two winding parts 25b-1, Or only 25b-2. Furthermore, two winding portions may be provided on one permanent magnet 10a.

  Further, the permanent magnet 10b may be omitted. Since the magnetic flux of the permanent magnet 10b is added to the permanent magnet 10a, the operation of the generator 1 described above is the same even if the permanent magnet 10b is omitted, although the amount of power generation is changed.

  Further, the permanent magnet 10a may be omitted together with the permanent magnet 10b. At this time, it is preferable that the center side protruding portion 11a is extended and arranged at the arrangement position of the permanent magnet 10a. According to this, only the magnetic flux of the permanent magnet 24 of the outer yoke 3 passes through the winding portion 25b. In this case, the magnitude relationship of the magnetic flux density of the winding portions 25b-1 to 25b-4 is the same as that of the generator 1A.

  Moreover, although the center yoke 2 is cylindrical, one or both of its end portions may be closed. The shape including the end portion closed in this way is referred to as a cylindrical shape.

  Moreover, it is good also as a structure which does not have all or one part of winding part 25b-1 to 25b-4. Or it is good also as a structure which does not have all or one part of winding part 25a-1-25a-4. Alternatively, a configuration in which a part of the winding parts 25b-1 to 25b-4 and a part of the winding parts 25a-1 to 25a-4 are not included, or all of the winding parts 25b-1 to 25b-4 are configured. The winding part 25a-1 to 25a-4 is not partly configured, or part of the winding part 25b-1 to 25b-4 and all of the winding part 25a-1 to 25a-4 are provided. There may be no configuration. Thus, by changing the configuration of the winding portions 25a and 25b, the power generation amount of the generators 1 and 1A can be appropriately changed. Further, since the winding portion 25b is not provided, the output terminal 4b can be omitted.

DESCRIPTION OF SYMBOLS 1,1A ... Generator, 2 ... Center yoke, 3 ... Outer yoke, 4a, 4b ... Output terminal, 10a, 10b, 24 ... Permanent magnet, 11 ... Center core, 11a ... Center side protrusion part, 12 ... Hollow part, 21 ... Non-magnetic part, 22 ... groove part, 23 ... outer core, 23a ... outer side protruding part, 25a, 25b ... winding part

Claims (5)

In the linear power generator in which one or both of the center yoke and the outer yoke move linearly by the gas sent and exhausted,
The center yoke having a center winding portion on the center side and a plurality of outer peripheral permanent magnets on the outer peripheral side, and made of a soft magnetic material,
The outer yoke having a plurality of groove portions on the center side and a plurality of winding portions on the outer peripheral side, and made of a soft magnetic material,
Have
The center yoke has a cylindrical shape, and a plurality of rod-shaped permanent magnets that are long in the axial direction and NS magnetized in the circumferential direction are spaced apart in the circumferential direction on the outer periphery of the cylindrical shape, And having a plurality of center-side protrusions arranged in a straight line in the circumferential direction and arranged so that opposing magnetic poles of the outer circumferential permanent magnets adjacent in the circumferential direction are the same pole, the inner peripheral side of the position, possess the center winding portion,
The outer yoke is cylindrical and has a plurality of winding portions arranged in a circumferential direction around a central axis, a plurality of groove portions arranged at positions facing the outer peripheral permanent magnet, and the center and the outer-side projection sandwiching the groove portion in a circumferential direction while being staggered by half a pitch in the axial direction opposite to the side protrusion, was closed,
On the inner periphery of the center yoke, a plurality of plate-shaped inner peripheral permanent magnets that are NS magnetized in a direction that is long in the axial direction and orthogonal to the circumferential direction are adjacent to the inner peripheral permanent magnet in the circumferential direction. Then, the magnetizing direction is reversed, and the arrangement position of the outer peripheral permanent magnet and the arrangement position of the inner peripheral permanent magnet are alternately arranged.
A linear power generator characterized by that. In the linear power generator in which one or both of the center yoke and the outer yoke move linearly by the gas sent and exhausted,
The center yoke having a center winding portion on the center side and a plurality of outer peripheral permanent magnets on the outer peripheral side, and made of a soft magnetic material,
The outer yoke having a plurality of groove portions on the center side and a plurality of winding portions on the outer peripheral side, and made of a soft magnetic material,
Have
The center yoke has a cylindrical shape, and a plurality of rod-shaped permanent magnets that are long in the axial direction and NS magnetized in the circumferential direction are spaced apart in the circumferential direction on the outer periphery of the cylindrical shape, In addition, the magnetic poles are arranged so that the opposing magnetic poles of the outer peripheral permanent magnets adjacent to each other in the circumferential direction are the same, and are arranged in a straight line in the circumferential direction, and between the adjacent installation positions sandwiching the outer peripheral permanent magnet a plurality of center-side projection which is arranged to be shifted by half a pitch in the axial direction, the inner peripheral side of the position of the outer peripheral permanent magnet may have a the center winding portion,
The outer yoke is cylindrical and has a plurality of winding portions arranged in a circumferential direction around a central axis, a plurality of groove portions arranged at positions facing the outer peripheral permanent magnet, and the center An outer side protruding portion that is arranged in a straight line in the circumferential direction facing the side protruding portion and sandwiches the groove portion in the circumferential direction,
On the inner periphery of the center yoke, a plurality of plate-shaped inner peripheral permanent magnets that are NS magnetized in a direction that is long in the axial direction and orthogonal to the circumferential direction are adjacent to the inner peripheral permanent magnet in the circumferential direction. Then, the magnetizing direction is reversed, and the arrangement position of the outer peripheral permanent magnet and the arrangement position of the inner peripheral permanent magnet are alternately arranged.
A linear power generator characterized by that. The cylindrical outer periphery has a plurality of rod-shaped outer peripheral permanent magnets that are elongated in the axial direction and NS magnetized in the circumferential direction, and are adjacent to each other in the circumferential direction at intervals in the circumferential direction. The outer peripheral permanent magnet is arranged so that the opposing magnetic poles are the same pole, and has a plurality of center side protrusions arranged in a straight line in the circumferential direction, and the inner peripheral side of the arrangement position of the outer permanent magnet Includes a center yoke made of a soft magnetic material having a center winding portion, and
A plurality of winding portions disposed in a circumferential direction around a central axis, a plurality of groove portions disposed at positions facing the outer peripheral permanent magnet, and the center-side protruding portion. An outer yoke made of a soft magnetic material having an outer side protruding portion that is arranged with a half-pitch shift in the axial direction and sandwiches the groove portion in the circumferential direction;
Have
On the inner periphery of the center yoke, a plurality of plate-shaped inner peripheral permanent magnets that are NS magnetized in a direction that is long in the axial direction and orthogonal to the circumferential direction are adjacent to the inner peripheral permanent magnet in the circumferential direction. Then, it is arranged so that the magnetization direction is opposite, and the arrangement position of the outer peripheral permanent magnet and the arrangement position of the inner peripheral permanent magnet are alternated,
One or both of the center yoke and the outer yoke move linearly;
A linear power generator characterized by that. The cylindrical outer periphery has a plurality of rod-shaped outer peripheral permanent magnets that are elongated in the axial direction and NS magnetized in the circumferential direction, and are adjacent to each other in the circumferential direction at intervals in the circumferential direction. The outer peripheral permanent magnets are arranged so that the opposing magnetic poles are the same, and are arranged in a straight line in the circumferential direction, and the installation positions sandwiching the outer peripheral permanent magnet are shifted by a half pitch in the axial direction. A center yoke made of a soft magnetic material having a center winding part on the inner peripheral side of the arrangement position of the outer peripheral permanent magnet;
A plurality of winding portions disposed in a circumferential direction around a central axis, a plurality of groove portions disposed at positions facing the outer peripheral permanent magnet, and the center-side protruding portion. An outer yoke that is arranged in a straight line in the circumferential direction and has an outer side protrusion that sandwiches the groove in the circumferential direction;
Have
On the inner periphery of the center yoke, a plurality of plate-shaped inner peripheral permanent magnets that are NS magnetized in a direction that is long in the axial direction and orthogonal to the circumferential direction are adjacent to the inner peripheral permanent magnet in the circumferential direction. Then, it is arranged so that the magnetization direction is opposite, and the arrangement position of the outer peripheral permanent magnet and the arrangement position of the inner peripheral permanent magnet are alternated,
One or both of the center yoke and the outer yoke move linearly;
A linear power generator characterized by that. The linear power generator according to claim 3 or 4 ,
An outer yoke permanent magnet which is arranged along the axial direction and is NS magnetized so as to have a polarity opposite to that of the opposed permanent magnet for the outer periphery of the center yoke is arranged in the groove portion.
A linear power generator characterized by that.

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