JP2012151986A - Vibration power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration power generator for converting kinetic energy by vibrations accompanied by reciprocation to electric power, which is excellent in electric power conversion efficiency even when a housing is small-sized and is capable of increasing an output voltage.SOLUTION: For the vibration power generator, a magnet body includes at least one or more poles and one or more magnets connected to the poles. Each of a plurality of coils has a winding width hc roughly matching with a thickness hp of the pole of the magnet body and roughly matching 1/n (n:an integer equal to or larger than 1) of a thickness hm of the magnet of the magnet body, and is successively wound without a clearance around a housing corresponding to the reciprocating range of the poles of the magnet body. Two coils holding n pieces of the other coils therebetween are connected in series and/or connected in parallel to each other to form an output terminal of (n+1) phase.

Description

  The present invention relates to a vibration generator that converts kinetic energy due to vibration accompanied by reciprocation into electric power, and more particularly to a vibration generator that is excellent in power conversion efficiency and can increase output voltage even in a small casing.

  In a vibration generator that converts kinetic energy into electric power, when a person carries it or attaches it to a vibrating device, it generates a reciprocating vibration in the internal vibrating body, and the kinetic energy is converted with high conversion efficiency. There is a demand for conversion to electric power. In particular, a vibration generator including a reciprocating magnet or a reciprocating coil is disadvantageous in that the power generation efficiency tends to be low due to the limitation of the coil length or the configuration of the magnetic circuit when downsizing. There is a point. Therefore, conventionally, various vibration generators have been proposed to solve these problems.

  Conventionally, the battery includes a rechargeable battery, a cylindrical coil, a rod-like permanent magnet that is inserted into the axial core portion of the coil and is held by a spring so as to be movable in the axial direction, and a rectifier. In the portable generator that rectifies the AC voltage generated in the coil by the axial vibration of the permanent magnet based on vibration and swing when being carried by the rectifier and charges the battery with the rectified DC voltage, A portable type characterized in that an axial resonance frequency of a permanent magnet system composed of the permanent magnet and the spring is approximately matched with an average period of a main vibration source that generates the axial vibration when being carried. There is a generator. (Patent Document 1).

  A hollow first pipe formed of a non-magnetic material and closed at both ends; a power generating coil wound around the first pipe and provided with at least one solenoid coil; A movable magnet disposed inside the first pipe and movable along a winding axis direction of the power generation coil, the movable magnet being formed of a nonmagnetic material and closed at both ends. A second pipe and a plurality of magnets sealed inside the second pipe, wherein the movable magnets are disposed at both ends of the second pipe, There is a vibration type electromagnetic generator including a magnet end member that protects a magnet (Patent Document 2).

  Further, the same poles are opposed to each other with a minute distance, a plurality of permanent magnets magnetized in the length direction are integrated, and a plurality of coils are arranged on the outer periphery of the integrated permanent magnet, There is a vibration power generator which has an appropriate interval and is configured so that winding directions are alternately reversed, and generates electric power by moving the integrated permanent magnet (Patent Document 3). In particular, the length of each of the plurality of coils is 70% to 90% of the length of the individual magnet, or the distance between the opposing permanent magnets is 10% to 40% of the length of the magnet. Alternatively, there is a vibration generator in which the distance between each coil is 10% to 30% of the length of each individual magnet, or the number of coils is the same as the number of magnets or the number of magnets is +1 or more.

JP 2002-374661 A (FIGS. 1 to 5) JP 2009-118581 A (FIGS. 1 to 9) JP 2006-296144 A (FIGS. 1-2)

  However, the electrodynamic vibration generators as described in Patent Documents 1 to 3 are not sufficient for improving the power generation efficiency. In the electrodynamic vibration generators as described in Patent Documents 1 to 3, when a plurality of coils are provided with a space between each other, the relative positions of the reciprocating magnet and the plurality of coils. Depending on the relationship, there is a problem that the electromotive force may be extremely low and is not efficient.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention relates to a vibration generator that converts kinetic energy due to vibration accompanied by reciprocation into electric power, and is a small casing. However, the object is to provide a vibration generator that is excellent in power conversion efficiency and can increase the output voltage.

  The vibration generator of the present invention includes a plurality of coils, a cylindrical casing around which the coils are wound, two fixed bodies respectively provided at both ends of the casing, and magnetized magnets. A magnet body installed so as to be capable of reciprocating along the inner surface of the housing, and the magnet body includes at least a plurality of poles and one or more magnets coupled to the poles. Each of the plurality of coils has a winding width that substantially matches the thickness hp of the pole of the magnet body and substantially matches 1 / n of the magnet thickness hm of the magnet body (n is an integer of 1 or more). hc, two coils that are sequentially wound around the casing without gaps corresponding to the range in which the pole of the magnet body reciprocates, and n other coils are sandwiched between them in series and / or Alternatively, they are connected in parallel to form an (n + 1) -phase output terminal.

  Preferably, in the vibration power generator according to the present invention, the magnet body has at least a plurality of poles and a plurality of magnets coupled to the poles, and the two magnets repel each other by sandwiching the poles on the side showing the same magnetic pole. Create a magnetic field.

  In the vibration generator of the present invention, two coils sandwiching n other coils are connected in series and / or in parallel with each other in reverse phase, and (2n + 1) other coils are interposed between them. Two coils sandwiching the coils are connected in series and / or in parallel with each other in the positive phase.

  Preferably, the vibration generator according to the present invention includes a plurality of rectifiers connected to (n + 1) -phase output terminals from a plurality of coils of the vibration generator, and an output in which outputs of the plurality of rectifiers are connected in parallel. And a terminal.

  The operation of the present invention will be described below.

  The vibration generator of the present invention includes a plurality of coils, a cylindrical casing around which the coils are wound, two fixed bodies respectively provided at both ends of the casing, and magnetized magnets. And a magnet body installed so as to be capable of reciprocating along the inner surface of the housing. The moving magnet body has at least a plurality of poles and one or more magnets connected to the poles. For example, the moving magnet body may have two magnets respectively connected to both end faces of one pole. You may have two poles and three magnets. When the magnet body has at least a plurality of poles and a plurality of magnets connected to the poles, the two magnets sandwich the poles on the side showing the same magnetic pole to form a repulsive magnetic field.

  As a result, in the vibration power generator of the present invention, when the magnet body installed so as to be able to reciprocate moves, each coil provided corresponding to the range in which the high permeability pole through which the repulsive magnetic field passes reciprocates is provided. In addition, a coil electromotive force is generated by electromagnetic induction. Each of the plurality of coils has a winding width hc that substantially matches the thickness hp of the pole of the magnet body and substantially matches 1 / n (n: an integer of 1 or more) of the magnet thickness hm of the magnet body. Then, the magnetic poles are sequentially wound around the casing in a manner corresponding to the range in which the pole of the magnet body reciprocates. Further, in each of the plurality of coils, two coils sandwiching n other coils in between are connected in series and / or in parallel to form an (n + 1) -phase output terminal. The vibration generator further includes a plurality of rectifiers connected to (n + 1) -phase output terminals from a plurality of coils of the vibration generator, and an output terminal to which outputs of the plurality of rectifiers are connected in parallel. Also good.

  Therefore, in the vibration power generator of the present invention, the electromotive force is reduced due to the relative positional relationship between the reciprocating magnet and the plurality of coils, as compared with the case where the plurality of coils are provided with a space therebetween. There is little, and efficient power generation becomes possible. In other words, the relative relationship between the winding width hc of each coil of the (n + 1) phase that is sequentially wound around the housing without any gap, the pole thickness hp of the magnet body, and the magnet thickness hm of the magnet body is optimized. This is because the electromotive force generated in each of the two coils sandwiching the n other coils in between has the same phase relationship and is maximized at substantially the same timing. Furthermore, by using a plurality of rectifiers whose respective outputs are connected in parallel, when the rectified DC voltage of (n + 1) phase is synthesized, regardless of the relative positional relationship between the reciprocating magnet and the plurality of coils, High electromotive force can be maintained. The vibration generator of the present invention can increase the power conversion efficiency even in a small casing, and can further increase the output voltage.

  With respect to a vibration generator that converts kinetic energy due to vibration accompanied by reciprocation into electric power, it is possible to provide a vibration generator that is excellent in electric power conversion efficiency and can increase output voltage even in a small casing.

It is sectional drawing explaining the vibration generator 1 by preferable embodiment of this invention. Example 1 It is a figure explaining the connection of the rectifier of 1 A of vibration generators by preferable embodiment of this invention. Example 1 It is a graph which shows the output voltage of 1 A of vibration generators by preferable embodiment of this invention. Example 1

  Hereinafter, although the vibration generator by preferable embodiment of this invention is demonstrated, this invention is not limited to these embodiment.

  FIG. 1 is a diagram illustrating a vibration generator 1 according to a preferred embodiment of the present invention. Specifically, FIG. 1 is a cross-sectional view along the center axis in the vertical direction shown in the figure. In the vibration power generator 1, the magnet body 10 that is a vibrator moves in the direction of the center axis and vibrates. FIG. 2 is a diagram for explaining connection of the vibration generator 1 and the vibration generator 1A including the rectifier. In addition, as will be described later, a part of the structure of the vibration generator 1 and an internal structure are omitted.

  The vibration generator 1 includes a coil 2, a cylindrical casing 3 around which the coil 2 is wound, fixed bodies 4a and 4b provided at both ends of the casing 3, and a magnetized magnet 11, respectively. The vibration generator includes a magnet body 10 that is installed so as to be capable of reciprocating along the inner surface of the housing 3 between the fixed bodies 4a and 4b. The vibration generator 1 according to the present embodiment is a small and light vibration generator having a substantially cylindrical shape having a major axis length of about 101 mm and a minor axis diameter of about 27 mm. For example, when the vibration generator 1 vibrates at an illustrated displacement Z0 due to external vibration, the magnet body 10 that is a vibrator vibrates at the displacement Z1 therein, so the vibration generator 1 is caused by the vibration of the magnet body 10. Kinetic energy can be converted into electric power.

  The cylindrical housing 3 is a hollow cylinder made of a non-magnetic material. In this embodiment, the cylindrical housing 3 is a straight pipe made of a resin molded product having an inner diameter of about φ12 mm, and the magnet body 10 extends along the inner surface. It is installed so that it can reciprocate. A coil 2a, a coil 2b, and a coil 2c made up of a plurality of coils are wound around the outer surface of the cylindrical housing 3 in order without any gaps, thereby forming the coil 2. For example, each of the coils 2a is formed by connecting in parallel five one coil 20a formed by winding a copper wire having a diameter of about 0.11 mm into a winding width hc of about 2.6 mm and about 50 layers. It is the coil which comprises. The coil 2b is a coil configured by connecting five coils 20b, which are configured in substantially the same manner as the coil 20a, in parallel, and the coils 20b are adjacent to each other on the upper side of the coil 20a without a gap. Are wound in the same winding direction as the coil 20a. Further, the coil 2c is a coil configured by connecting five coils 20c, which are configured in substantially the same manner as the coils 20a and 20b, in parallel, and each coil 20c has a gap below the coil 20a. It is wound in the same winding direction as the coil 20a at adjacent positions. The winding width hc of each of the coils 20a, 20b, and 20c is made equal to about 2.6 mm.

  As shown in the drawing, the coils 2a, 2b, and 2c are wound around the casing 3 without any gaps in the vertical direction, and each pair of the coils 20a, 20b, and 20c is configured in the opposite direction in the vertical direction. They are connected in parallel so that current flows in the direction of rotation. The coil 2a outputs the coil electromotive force generated in the coil 20a to the output terminal 21a. Similarly, the coil 2b outputs the coil electromotive force generated in the coil 20b to the output terminal 21b. Furthermore, the coil 2c outputs the coil electromotive force generated in the coil 20c to the output terminal 21c. A rectifier 22a is connected to the output terminal 21a, a rectifier 22b is connected to the output terminal 21b, a rectifier 22a is connected to the output terminal 21c, and these three-phase outputs are connected in parallel to the output terminal 23.

  Each coil 20a, 20b, and 20c has a winding width hc that substantially matches the thickness hp of the pole 12 of the magnet body 10 and substantially matches one-half of the thickness hm of the magnet 11 of the magnet body 10. have. The coils 20a, 20b, and 20c are sequentially wound around the housing without a gap corresponding to the range in which the pole 12 of the magnet body 10 reciprocates. In this embodiment, the coils 20b, 20a, And the coil which makes 20c 1 set is wound by the housing | casing 3 by 5 sets. Therefore, for example, in each of the coils 20a, two coils sandwiching two other coils 20b and 20c are connected in parallel to each other and connected to the output terminal 21a. Similarly, in each of the coils 20b, two coils sandwiching two other coils 20a and 20c in between are connected in parallel to each other and connected to the output terminal 21b. Similarly, in each of the coils 20c, two coils sandwiching two other coils 20a and 20b in between are connected in parallel to each other and connected to the output terminal 21c.

  The fixed bodies 4a and 4b are non-magnetic resin molded parts, and are fixed to both ends of the housing 3 with screws or an adhesive. Each of the fixed bodies 4a and 4b may include a buffer body that is connected to the magnet body 10 so as to be accessible at the center thereof. For example, the buffer may have a disk-shaped buffer magnet 5 that applies a repulsive force between the approaching magnet body 10 and the fixed body 4. The buffer magnet 5 that is a buffer body prevents the magnet body 10 from moving and colliding with the fixed bodies 4 located at both ends of the housing 3 violently and being destroyed by impact. For example, the buffer magnet 5 is a disc-shaped rare earth magnet having a diameter of about 10.5 mm and a thickness of about 1.0 mm. The buffer magnet 5 is attached to the central portion of the fixed body 4 with an adhesive. In the case of the present embodiment, as shown in FIG. 1, the buffer magnet 5a provided on the lower fixed body 4a and the buffer magnet 5b provided on the upper fixed body 4b are close to the vibrating magnet body 10. It is magnetized so that different magnetic poles (N pole and S pole) appear on the sides.

  The magnet body 10 of this embodiment includes four cylindrical rare earth magnets having an outer diameter of about φ 11.5 mm and a length (thickness) hm of about 6.3 mm. As shown in FIG. 1, the magnets 11a, 11b, 11c, and 11d are magnetized so that different magnetic poles (N pole and S pole) appear in the vertical direction of vibration, and two of the magnets 11 are poles. 12 are connected to form a repulsive magnetic field by sandwiching them on the side showing the same magnetic pole. Specifically, the pole 12 is a cylindrical soft iron member having an outer diameter of about φ 11.5 mm and a length (thickness) hp of about 3.2 mm. A pole 12a is disposed between the magnets 11a and 11b, a pole 12b is disposed between the magnets 11b and 11c, and a pole 12c is disposed between the magnets 11c and 11d. The rare earth magnet is an Nd—Fe—B type neodymium magnet or an Sm—Co type samarium cobalt magnet, which has a large maximum energy product (BH) max, An Nd—Fe—B rare earth magnet having a larger magnetization and coercive force and a strong coercive force even in a small volume may be used. Of course, the magnet 11 may be a ferrite magnet.

  A vibration power generator 1A shown in FIG. 2 is a vibration power generator including the vibration power generator 1 described above and rectifiers 22a, 22b, and 22c. In the vibration power generator 1, when the magnet body 10 installed so as to be capable of reciprocating is moved, the poles 12a, 12b and 12c having high permeability through which the repulsive magnetic field passes are provided corresponding to the range in which the reciprocating motion is performed. Therefore, a coil electromotive force is generated in each of the coils 20a, 20b, and 20c by electromagnetic induction. For example, the rectifiers 22a, 22b, and 22c are full-wave bridge rectifier circuits that connect four diodes, and full-wave rectifies an AC voltage to convert it into a DC voltage. That is, in the vibration power generator 1 </ b> A, the rectified three-phase coil electromotive force generated in the coils 2 a, 2 b and 2 c of the vibration power generator 1 can be synthesized and output from the output terminal 23.

  When an external force is applied and the vibration power generator 1 vibrates at the displacement Z0, the magnet body 10 that is a vibrator vibrates at the displacement Z1 therein. The magnet body 10 installed so as to be able to reciprocate along the inner surface of the housing 3 moves at a certain relative speed in the inner space of the coil 2 wound around the housing 3. The magnet body 10 is connected so that two magnets 11 magnetized so as to form a DC magnetic field sandwich a pole 12 on the side showing the same magnetic pole to form a repulsive magnetic field. When passing inside the coils 20a, 20b, and 20c, the coils 20a, 20b, and 20c have an electromotive force that tries to cancel the change in the DC magnetic field generated by the pole 12 of the magnet body 10 at each position. Is generated in proportion to the relative speed by electromagnetic induction.

  In the vibration power generator 1 of the present embodiment, each of the coils 20a, 20b, and 20c substantially matches the thickness hp of the poles 12a, 12b, and 12c of the magnet body 10, and the magnet 11a of the magnet body 10 11b, 11c, and 12d having a winding width hc substantially equal to one half of the thickness hm, and sequentially winding around the casing in a manner corresponding to the range in which the pole 12 of the magnet body 10 reciprocates. It has been turned. Further, for example, two coils 20a sandwiching two other coils in between are connected in parallel to each other, and the coils 20b and 20c similarly form a three-phase output terminal. Accordingly, when the magnet body 10 repeatedly vibrates in the vertical direction shown in FIG. 1 due to external vibration, the poles 12a, 12b, and 12c of the magnet body 10 simultaneously form, for example, the coil 2a. The inside of the three coils 20a that vibrate vibrates and enters and exits.

  When the magnet body 10 further vibrates, similarly, the poles 12a, 12b, and 12c of the magnet body 10 are simultaneously arranged in the three coils 20b constituting the coil 2b wound so as to be adjacent to the coil 20a. Vibrate and go in and out. Further, when the magnet body 10 vibrates, similarly, the poles 12a, 12b, and 12c of the magnet body 10 are simultaneously wound inside the three coils 20c constituting the coil 2c wound so as to be adjacent to the coil 20b. Vibrate and go in and out. Thus, the vibration generator 1 can convert the kinetic energy due to the vibration of the magnet body 10 into electric power as a three-phase AC coil electromotive force.

  The vibration generator 1 of the present embodiment is a case where a three-phase AC output is obtained by the three coils 2a, 2b and 2c. However, when n is an integer of 1 or more, a plurality of coils ( Anything can be used as long as an AC output of n + 1) phase or more is obtained. That is, the vibration generator 1 according to the present invention includes the winding width hc of the (n + 1) -phase coils that are sequentially wound around the casing without gaps, the pole thickness hp of the magnet body, and the magnet thickness of the magnet body. This is because the relative relationship between hm and the hm is optimized, so that the electromotive force generated in each of the two coils sandwiching the n other coils is in-phase and maximized at substantially the same timing. . Furthermore, by using a plurality of rectifiers whose respective outputs are connected in parallel, when the rectified DC voltage of (n + 1) phase is synthesized, regardless of the relative positional relationship between the reciprocating magnet and the plurality of coils, High electromotive force can be maintained. The vibration generator of the present invention can increase the power conversion efficiency even in a small casing, and can further increase the output voltage. The coil winding width hc is preferably substantially equal to the thickness hp of the pole 12 of the magnet body 10, but may be within a range of about 0.8 to 1.25 times the dimension hp.

  The absolute value of the relative velocity due to vibration between the magnet body 10 and the coil 2 increases when the magnet body 10 moves near the center of the housing 3, while the stationary body on the end side of the housing 3. It becomes smaller when it reaches 4a and 4b and returns. Therefore, when the magnet body 10 vibrates sinusoidally, the waveform of the coil electromotive force output to the output terminal 23 connected to the coil 2 of the vibration power generator 1 moves around the center of the housing 3. On the other hand, it becomes large (sinusoidal antinode), and on the other hand, when it reaches the fixed bodies 4a and 4b on the end side of the housing 3 and turns back (when the speed becomes minimum), it becomes small (sinusoidal node). ). In the vibration power generator 1, any one of the coils 2a, 2b, and 2c corresponds to a range in which the poles 12a, 12b, and 12c of the magnet body 10 reciprocate. Therefore, the vibration power generator 1 is provided corresponding to the range in which the poles 12a, 12b and 12c having high permeability reciprocate when the magnet body 10 installed so as to reciprocate moves. Due to the induction, a higher coil electromotive force is generated.

  FIG. 3 is a graph showing the output voltage of the vibration power generator 1A of the present embodiment. The magnet body 10 positioned at the center point (Z = 0 mm) of the housing 3 of the vibration power generator 1 has a distance Z1 (± about 15 mm is a graph showing a waveform of the rectified coil electromotive force in the case of sine vibration in a range of 15 mm (minus direction is omitted). The horizontal axis is the distance of the relative position from the central point of the housing 3 along the central axis, and the vertical axis is the DC voltage that has passed through the rectifiers 22a, 22b, and 22c. The graph of FIG. 3 combines the waveform 101a corresponding to the output of each coil 2a, the waveform 101b corresponding to the output of the coil 2b, the waveform 101c corresponding to the output of the coil 2c, and the rectifiers 22a, 22b and 22c. The output waveform 100 indicated by a thick line at the output terminal 23 is included.

  A position 0 in the graph of FIG. 3 represents a stationary position as a reference of the magnet body 10, and the speed of the magnet body 10 is the highest at that point, so that the coil electromotive force in the coil 2 is also the largest. In the coil 2 which is a three-phase coil, the coils 2a, 2b, and 2c are combined with no gap, so that the output voltage is extremely lowered although the peak point of the voltage varies depending on the position of the magnet body 10. There is no. Further, since the coil 2 that is a three-phase coil is used, the maximum voltage at the optimum position of each of the coils 2a, 2b, and 2c can be taken out as an output. Since the coils 2a, 2b, and 2c have the same impedance, they are excellent in terms of power.

  In the vibration power generator 1, the coils 2a, 2b, and 2c constituting the coil 2 may be configured by connecting a plurality of coils 20a, 20b, and 20c each having a winding width hc in series, and a plurality of coils A coil may be added. In the coil 2, the winding direction of a plurality of coils, or the polarity of series connection and / or parallel connection can be reversed according to the direction of the magnetic flux from the magnet body. By providing a plurality of coils at a position where the magnetic flux of the magnet body is effectively interlinked, that is, a position where the magnetic flux density is high, the output voltage at the coil can be further increased. The coil 2 may be connected with the same polarity so that the coil electromotive force generated in the coils 2a, 2b, and 2c is output to the output terminal 21 without canceling each other.

  The vibration power generator 1 also includes a magnet body 10 and fixed bodies 4a and 4b (or buffer magnets 5a or 5b) that approach each other when the magnet body 10 that is a vibrator moves and vibrates in the direction of the central axis. You may further have an elastic member which makes an elastic force act between each. The elastic member may be a nonmagnetic metal spring, an elastic resin, or a foam material containing bubbles. Both ends of the elastic member are fixed to the magnet body 10 as a vibrator and the fixed body 4. The elastic member prevents the magnet body 10 from moving and colliding with the fixed bodies 4 located at both ends of the casing vigorously and being destroyed by impact. Further, it is possible to prevent the moving magnet body 10C from coming into close contact with the buffer magnet 5a or 5b.

  The vibration generator of the present invention can also be applied to a generator including a rectifier, a storage battery, a charging circuit, etc., a charging battery, and a charger. In addition, since the electronic device including the vibration generator of the present invention is excellent in portability, it is particularly suitable as a mobile device carried by a user or a generator attached to a vehicle that generates a lot of vibrations.

1, 1A Vibration generator 2, 2a, 2b, 2c, 20a, 20b, 20c Coil 3 Housing 4a, 4b Fixed body 5a, 5b Buffer magnet 10 Magnet bodies 11a, 11b, 11c, 11d Magnets 12a, 12b, 12c Pole 21a, 21b, 21c, 23 Output terminals 22a, 22b, 22c Rectifier

Claims (4)

A plurality of coils, a cylindrical casing around which each of the coils is wound, two fixed bodies respectively provided at both ends of the casing, and each fixed body including magnetized magnets. A magnet body installed so as to be capable of reciprocating along the inner surface of the housing,
The magnet body has at least a plurality of poles and one or more magnets coupled to the poles;
Each of the plurality of coils substantially coincides with the thickness hp of the pole of the magnet body and substantially coincides with 1 / n of the magnet thickness hm of the magnet body (n is an integer of 1 or more). Two coils having a winding width hc, which are sequentially wound around the housing without a gap corresponding to the range in which the pole of the magnet body reciprocates, and sandwiching the n other coils therebetween. Are connected in series and / or in parallel to form an output terminal of (n + 1) phase,
Vibration generator. The magnet body has at least a plurality of the poles and a plurality of the magnets connected to the poles, and the two magnets sandwich the poles on the side showing the same magnetic pole to form a repulsive magnetic field.
The vibration generator according to claim 1. The two coils sandwiching n other coils in between are connected in series and / or in parallel with each other in opposite phase, and the two coils sandwiching (2n + 1) other coils in between Are connected in series and / or in parallel with each other in positive phase,
The vibration generator according to claim 1 or 2. A plurality of rectifiers connected to the output terminals of the (n + 1) phase from the plurality of coils of the vibration generator; and an output terminal to which outputs of the plurality of rectifiers are connected in parallel.
The vibration generator according to any one of claims 1 to 3.