JP2018078777A - Dynamo-electric generator with rotation acceleration part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamo-electric generator which is not required to change a structure of the dynamo-electric generator having a rotation acceleration part and a small size, even when changing a specification of an acceleration rate.SOLUTION: A dynamo-electric generator 100 includes: a rotation acceleration part 80 with a magnet gear mechanism constructed by a stator 15 including a low speed rotor 11 and a plurality of stator poles 14 which includes a plurality of low speed rotor magnets 12 attached to an input axis 52, and a high speed rotor 16 having a plurality of high speed rotor magnets 17; a plurality of power generation magnets 31 that are rotated at an increase speed by the rotation acceleration part 80; and a power generation part 90 constructed by a plurality of power generation coils 32 induced by the electronic of the rotation of each power generation magnet 31. The power generation magnets 31 of a logarithmic number independence of a number of the low speed rotor magnets 12, the high speed rotor magnets 17, and the stator poles 14 are provided. Thus, in regards to a specification of the rotation acceleration part 80, the specification of the power generation part 90 can be freely set, and increase in size of the dynamo-electric generator by the connection of the rotation acceleration part 80 with the power generation part 90 can be avoided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a generator used in the sea or underwater, and more particularly to a generator having a rotation speed increasing portion by a magnetic gear mechanism that is advantageous for use in the sea at a low flow velocity.

As for power generation using natural energy, solar power generation, wind power generation, hydroelectric power generation and the like have been put into practical use or being studied.
Among these, hydropower generation includes small hydropower generation using irrigation canals, tidal power generation and tidal power generation using ocean currents and seas, in addition to power generation by large-scale hydropower stations such as dams. Such hydroelectric power generation is preferable because it is a stable power source with relatively stable output because there is no significant change in the amount of power generation due to the weather such as wind power generation at night, as in solar power generation.

  On the other hand, in these small hydropower generation and tidal power generation etc., the flow velocity of the water flow that can be used is often small, and it is difficult to obtain a sufficient rotation speed even if various turbines and propellers are used. Often, a rotation speed increasing part is incorporated to increase the rotation speed of the turbine or propeller.

  For example, in the valve-type turbine generator shown in Patent Document 1, as shown in FIG. 10, a turbine runner 902 that is rotatably held in a cylindrical generator body 901 is rotated by a tidal current or the like. Is transmitted to the generator 904 via the speed increasing mechanism 903. In the power generation device having such a configuration, it is possible to select and use a speed increasing mechanism 903 having an appropriate speed increasing ratio and a power generator 904 having an appropriate capacity in accordance with the amount of water and the flow speed of a river or the like to be installed. It is possible to generate power in a stable operating state.

  However, since the speed increasing mechanism 903 is incorporated between the water turbine runner 902 and the power generator 904 in the power generating apparatus as shown in Patent Document 1, the length of the power generator main body 901 is increased and the power generating apparatus is enlarged. In addition, it is necessary to connect the rotating shaft of the water turbine runner 902 and the input shaft of the speed increasing mechanism 903, and the output shaft of the speed increasing mechanism 903 and the input shaft of the generator 904 in a state where the shaft centers are aligned. There has been a problem of increasing.

  On the other hand, as shown in FIG. 11, the magnetic geared generator shown in Non-Patent Document 1 is a soft ring-shaped low-speed rotor having a plurality of poles connected to an external water turbine 911. 912 is rotatably held, and a substantially ring-shaped fixing portion 914 having a plurality of poles made of soft magnetic material is fixed to the outside of the low-speed rotor 912 concentrically with the low-speed rotor 913. A power generation coil 915 is mounted on each pole, and a substantially cylindrical high-speed rotor 913 having a plurality of magnets is rotatably mounted inside the low-speed rotor 912.

  In this magnetic geared generator, when the low-speed rotor 912 is rotationally driven by the water turbine 911, the high-speed rotor 913 is rotated at a high speed by the principle of operation of the magnetic gear, and the fixed portion is A coil 915 attached to the pole of 914 generates electricity and operates as a generator with a speed increasing device.

  As described above, the magnetic geared generator shown in Non-Patent Document 1 includes two substantially ring-shaped parts having a plurality of poles, that is, a low-speed rotor 912, a fixing portion 914, and one substantially circular shape having a plurality of magnets. A generator including a speed increasing mechanism is realized with a simple configuration of columnar parts, that is, a high-speed rotor 913 and coils 915 respectively mounted on a plurality of poles of the fixing portion 914.

  By the way, in the magnetic geared generator shown in FIG. 11, the number of poles of the low-speed rotor 912 is 20 and the number of magnets of the high-speed rotor 913 is 8, and the speed increase ratio as a magnetic gear is determined from these two poles. Non-Patent Document 1 shows that 20/8 is 2.5. In addition, a relational expression that “the number of poles of the low-speed rotor is the sum of the number of magnets of the high-speed rotor and the number of poles of the fixed part” is shown. From this relational expression, the number of poles of the fixed part 914 is 12, and the coil 915 Will also be 12. A three-phase AC output can be taken out from these 12 coils 915, and the number of coils 915 per phase is four. As described above, the magnetic geared generator shown in Non-Patent Document 1 is realized by a simple structure of a three-phase AC generator having a speed increasing mechanism with a speed increasing ratio of 2.5.

  However, in the magnetic geared generator described above, there is a problem that the basic configuration changes when trying to change the specifications of the product even a little. For example, when it is desired to increase the speed increasing ratio for use in a tidal current with a large amount of water but a small water flow, the coil configuration changes as shown below, and in some cases, the power generation output cannot be taken out.

For example, if the number of magnets of the high-speed rotor 913 remains 8 and the number of poles of the low-speed rotor 912 is changed from 20 to 24 in order to increase the speed increase ratio, the speed increase ratio becomes 3 at 24/8. . At this time, from the relational expression that “the number of poles of the low-speed rotor is the sum of the number of magnets of the high-speed rotor and the number of poles of the fixed part”, the number of poles of the fixed part 914 needs to be 16 poles. It will be 16.
In this configuration, since the number of magnets of the high-speed rotor 913 is eight, that is, a four-pole pair, an electromotive force of 360 ° × 4 = 1440 ° is generated in each coil when the high-speed rotor 913 rotates once. That is, the electrical angle during one rotation of the high speed rotor 913 is 1440 °. Further, since 16 coils 915 are arranged at equal intervals in one circumference, the phase difference between adjacent coils is 1440 ° ÷ 16 = 90 °.

In the above speed change ratio change example, the number of coils 915 is inevitably 16 and 16 is not divisible by 3, so the same number of coils 915 cannot be assigned to each phase of the three-phase output. Further, since the phase difference between adjacent coils is 90 °, a three-phase alternating current having a phase difference of 240 ° cannot be extracted.
From the above situation, in the above speed change ratio change example, the less common four-phase AC output or the maximum electromotive voltage is allowed to be reduced to a two-phase AC output.

  Further, as a method of increasing the speed increasing ratio, a method of reducing the number of magnets of the high speed rotor 913 is also conceivable. The number of magnets of the high speed rotor 913 is changed to 6 poles, and the number of poles of the fixing portion 914 is kept to 12 poles. It is also possible to do. In this case, from the relational expression that “the number of poles of the low-speed rotor is the sum of the number of magnets of the high-speed rotor and the number of poles of the fixed portion”, the number of poles of the low-speed rotor 912 is 18 poles, and the speed increasing ratio is 18/6. It becomes.

  However, since the number of magnets of the high-speed rotor 913 is six, that is, a three-pole pair, the electrical angle during one rotation of the high-speed rotor 913 is 360 ° × 3 = 1080 °. Therefore, the phase difference between adjacent coils is 1080 ° / 12 = 90 °, and it is impossible to take out a three-phase alternating current in which the phase difference of each phase is 240 °.

As another example, if the number of poles of the low speed rotor 912 is changed to 30 poles without changing the number of magnets of the high speed rotor 913 in order to increase the speed increasing ratio, the speed increasing ratio is 30/8 and 3.75. However, the number of poles of the fixing portion 914 is 22 poles. As a result, the number of coils 915 is also 22, and the phase difference between adjacent coils of the coil is 1440 ° ÷ 22 = 65.545.
Therefore, in this configuration, it is difficult to take out the three-phase output and the four-phase output, and it is necessary to adopt a completely different power generation output taking-out form.

  As described above, the magnetic geared generator shown in Non-Patent Document 1 is an excellent structure that can realize a generator with a built-in speed increasing mechanism with a simple structure. For example, if a specification change such as changing the speed increase ratio is made, the number of poles of the component parts will change, and this will greatly change the output state of the power generation coil and the generator configuration will change each time was there.

Japanese Patent Laid-Open No. 10-115278

Proposal of magnetic geared generator 2012 Annual Conference of the Institute of Electrical Engineers of Japan 5-043, pp71-72, 2012.03 Honkai, Hirata et al.

  The present invention has been made in view of the above problems, and is a generator that has a rotation speed increasing portion and is small in size and does not require a change in the configuration of the power generator even if specifications such as a speed increasing ratio are changed. The purpose is to provide.

The invention according to claim 1 in the generator having the rotation speed increasing portion of the present invention,
A generator that generates electric power by being rotationally driven from the outside, the generator having a rotation speed increasing part that accelerates the rotational drive and a power generating part that generates electricity by rotation, and has a plurality of pole pair magnets A low-speed rotor, a high-speed rotor having a smaller number of pole pairs than the magnet of the low-speed rotor, and a stator having a plurality of soft magnetic poles disposed between the low-speed rotor and the high-speed rotor. And NS = NL ± NH, where NL is the number of pole pairs of the magnet of the low speed rotor, NH is the number of pole pairs of the magnet of the high speed rotor, and NS is the number of poles of the stator. When the low-speed rotor rotates, the high-speed rotor is rotated at a speed increased by NL / NH times that of the low-speed rotor, the rotation speed increasing portion by a magnetic gear mechanism, and the power generation magnet rotated at a higher speed by the rotation speed increasing portion, Electromagnetic generation In the having the power generation unit consisting of the generating coil for an electromotive by rotation, a generator having a rotating speed increasing unit,
The generator magnet having the number of pole pairs independent of the number of pole pairs of the magnet of the low-speed rotor, the number of pole pairs of the magnet of the high-speed rotor, and the number of poles of the stator is attached to the high-speed rotor. To do.

According to the present invention, a generator having an optimal number of magnets and coils can be configured regardless of the configuration of the number of magnets of the magnetic gear mechanism. For example, when a generator with a magnetic gear speed increaser is commercialized as a series product, it is necessary to manufacture products with various speed increase ratios and power generation capacities. Now, since it has an independent and free number of generator magnets that are not affected by the magnet configuration of the magnetic gear, the number of generator magnets and coils can be changed even if the speed change ratio of the magnetic gear and the capacity of the generator are variously changed. You can choose freely. As a result, a configuration in which the electromotive forces of the plurality of power generation coils have the same phase is possible, and it is possible to connect the plurality of coils in either a serial or parallel form. The maximum voltage of electric power does not decrease, and a generator configuration with little loss can be taken.
Further, since the generator magnet is attached to the high-speed rotor of the magnetic gear, a structure for connecting the magnetic gear mechanism and the generator is not required, and a generator having a compact rotation speed increasing portion can be provided.

The invention according to claim 2 of the present invention is
When the number of pole pairs of the generator magnet is NM and the number of generator coils is NC, the ratio of the number of generator coils to the number of pole pairs of the generator magnet is NM: NC = 2: 3, or NM: NC = It is 1: 3 or NM: NC = 4: 3, It is a generator with the rotation speed increasing part of Claim 1 characterized by the above-mentioned.

In the present invention, since the ratio of the number NC of the power generation coils to the number NM of pole pairs of the power generation magnet is 1: 3, 2: 3, or 4: 3, the phase difference between adjacent coils is 120 °, 240 °, or 480 °, That is, since 360 ° + 120 °, the third coil of the plurality of power generation coils, for example, the first coil and the fourth coil have the same phase. Therefore, if a plurality of power generating coils are connected every third, it is possible to connect in either a serial or parallel form, and even if a plurality of coils are connected, the maximum voltage of the electromotive force does not decrease and there is no loss. Free coil connection is possible.
In addition, since the phase difference between adjacent coils is 120 ° or 240 °, three-phase alternating current can be connected without loss by connecting the adjacent coil and the adjacent coil every third. Can be taken out, and a generator having a rotation speed increasing portion with higher power generation efficiency can be provided.

The invention according to claim 3 of the present invention is
When the number of pole pairs of the power generation magnet is NM and the number of power generation coils is NC, the ratio of the number of power generation coils to the number of pole pairs of the power generation magnet is NM: NC = 1: 1, or NM: NC = The generator having a rotation speed increasing portion according to claim 1, wherein the generator is 1: 2.

  In the present invention, since the ratio of the number NC of the power generation coils to the number NM of pole pairs of the power generation magnet is 1: 2 or 1: 1, the phase difference between adjacent coils is 180 ° or 360 °, and there is no loss and free. A single-phase alternating current can be taken out by coil connection, and a generator having a rotation speed increasing portion with better power generation efficiency can be provided.

The invention according to claim 4 of the present invention is
The magnetic gear mechanism is a radial gap type in which the low-speed rotor, the stator, and the high-speed rotor are arranged concentrically, the high-speed rotor is arranged on the innermost periphery, and the power generation magnet is located inside the magnet of the high-speed rotor. The generator having the rotation speed increasing portion according to claim 1, wherein the generator is attached.

  In many cases, the magnet for the magnetic gear of the magnetic gear mechanism is arranged on the outer side in the radial direction in order to increase the maximum transmission torque, and the inner side in the radial direction is not used. For this reason, according to this invention, even if it incorporates a power generation part in a magnetic gear mechanism, it can avoid that the whole becomes large by arrange | positioning the magnet for power generation parts inside radial direction. As a result, it is possible to provide a further smaller generator having a rotation speed increasing portion.

The invention according to claim 5 of the present invention is
The center of the magnetic gear mechanism in the rotational axis direction of the magnet of the low-speed rotor, the center of the length of the high-speed rotor in the rotational axis direction of the magnet, and the length of the power generation magnet in the rotational axis direction 5. The generator having a rotation speed increasing portion according to claim 4, wherein the centers are on the same line.

  In the present invention, since the centers of all axial lengths of the high-speed rotor magnet, the stator, the low-speed rotor magnet, and the generator magnet are on the same line, the axial length can be minimized and the length of the apparatus can be reduced. Thus, a generator having a smaller rotation speed increasing portion can be provided.

The invention according to claim 6 of the present invention is
The low-speed rotor and the high-speed rotor are each rotatably held by two or more bearings separated in the rotation axis direction, the center of the length of the magnet in the rotation axis direction of the low-speed rotor, and the The generator according to claim 5, wherein the center of the length of the magnet in the direction of the rotation axis is between two or more of the bearings that hold each of the magnets.

  In the magnetic gear mechanism, neither the rotating shaft of the low-speed rotor nor the rotating shaft of the high-speed rotor is normally subjected to side pressure. However, for example, when the center of the rotating shaft is shifted, the magnetic force of the magnets of the high-speed rotor or the low-speed rotor When there is a large variation or the like, a radial side pressure is generated on the low-speed rotor or the rotating shaft of the high-speed rotor. Even in such a case, in the generator having the rotation speed increasing portion according to the present invention, since the center of each rotating shaft is between the two bearings, the radial side pressure is received by the two bearings, and the radial side pressure is Thus, it is possible to avoid the inclination of each rotating shaft and maintain stable operation. Thereby, the reliability of the generator which has a rotation acceleration part can be improved.

  The generator having the rotation speed increasing portion according to the present invention can provide a power generator that is small in size while having the rotation speed increasing portion and does not require a change in the configuration of the generator even if the speed increasing ratio is changed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of Example 1 of this invention, (a) is a top view, (b) is a center sectional drawing. It is a disassembled perspective view which shows the structure of a present Example. It is a figure which shows the structure of the rotation acceleration part of a present Example, (a) is a figure which shows the magnet arrangement | positioning of a low speed rotor, (b) is a figure which shows the pole arrangement | positioning of a stator, (c) is the magnet arrangement | positioning of a high speed rotor. FIG. It is a figure which shows the structure of the electric power generation part of a present Example, (a) is a figure which shows arrangement | positioning of a power generation magnet, (b) is a figure which shows arrangement | positioning of an electric power generation coil. It is a figure which shows the structure of the electric power generation part of the modification of a present Example, (a) is a figure which shows arrangement | positioning of a power generation magnet, (b) is a figure which shows arrangement | positioning of an electric power generation coil. It is the perspective view which cut open some generators which shows the internal structure of the other modification of this invention. It is a figure explaining the other modification, (a) is sectional drawing which shows a structure, (b) is a partial detail drawing which shows the detailed structure of an electric power generation part. It is a figure which shows the structure of Example 2 of this invention, (a) is a top view, (b) is a center sectional drawing. 6 is a cross-sectional view showing a configuration of Example 2. FIG. It is sectional drawing which shows the structure of the water turbine power generator by patent document 1. FIG. It is a conceptual diagram explaining the structure and operation | movement of a geared generator by a nonpatent literature 1.

Hereinafter, with reference to FIG. 1 to FIG. 4, a first embodiment of a generator having a rotation speed increasing portion according to the present invention will be described in detail.
First, the appearance and schematic structure of a generator having a rotation speed increasing portion according to this embodiment will be described with reference to FIG.

  As shown in FIG. 1 (a), the generator 100 according to the present embodiment is a rectangular parallelepiped in plan view, and the input shaft 52 protrudes substantially at the center of a substantially square surface.

  The generator 100 has a laminated structure as shown in FIG. 1B, and the outermost end on the side from which the input shaft 52 projects is before the input shaft 52 is rotatably held via a bearing 55. This is a side plate 51. The stator 15 is attached to the inner surface of the front plate 51 opposite to the surface from which the input shaft 52 projects. The stator 15 includes a plurality of soft magnetic stator poles 14 and a nonmagnetic pole holder 13 that holds the stator poles 14.

  A low-speed rotor accommodating portion 54 that accommodates the soft magnetic low-speed rotor 11 is provided on the inner surface side of the front plate 51, and the low-speed rotor 11 that is non-rotatably held by the input shaft 52 is provided in the low-speed rotor accommodating portion 54. Is housed in.

  A plurality of low-speed rotor magnets 12 are attached to the surface of the low-speed rotor 11 facing the stator 15, and the magnetic pole surface of the low-speed rotor magnet 12 faces the surface on one side of the stator pole 14 through a slight gap, that is, a gap. doing.

  A soft magnetic rear plate 59 is attached to the surface of the stator 15 opposite to the surface on which the front plate 51 is attached. A rotation center shaft 53 is non-rotatably attached to substantially the center of the pole holder 13 of the stator 15, and a tip end portion of the rotation center shaft 53 is inserted into a center hole 59 b of the rear plate 59.

  A plurality of coil yokes 59a project from the rear plate 59, and the power generation coils 32 are attached to the plurality of coil yokes 59a, respectively.

  A soft magnetic high-speed rotor 16 is rotatably held on the rotation center shaft 53 via a bearing 56 in a space between the stator 15 and the rear plate 59. A plurality of high-speed rotor magnets 17 are attached to the surface of the high-speed rotor 16 that faces the stator 15, and the magnetic pole surface of the high-speed rotor magnet 17 faces the other surface of the stator pole 14 with a slight gap. A plurality of power generation magnets 31 are attached to the surface facing the rear plate 59 of the high-speed rotor 16, and the magnetic pole surface of the power generation magnet 31 faces the upper surface of the coil yoke 59a with a slight gap.

  Next, a more detailed structure and operation of the generator 100 according to the present embodiment will be described with reference to FIG.

The low-speed rotor 11 has a substantially disk shape and is held on the input shaft 52 so as not to rotate at the center. A plurality of low-speed rotor magnets 12 having a substantially trapezoidal planar shape are attached to a surface facing the stator 15 of the low-speed rotor 11 side by side in an annular shape centering on the input shaft 52.
In FIG. 2, in order to clarify the shape and mounting state of the low-speed rotor magnet 12, the shapes of several low-speed rotor magnets 12 among the plurality of low-speed rotor magnets 12 behind the field of view of the low-speed rotor 11 are indicated by broken lines. Displayed.

The stator 15 is a non-magnetic body having a through-hole that fixes the rotation center shaft 53 substantially at the center, and a plurality of stator poles 14 that are soft magnetic bodies and have a substantially trapezoidal plane shape are centered on the through-hole. It is mounted side by side in an annular shape.
In FIG. 2, the shapes of several stator poles 14 among the plurality of stator poles 14 at the rear of the field of view of the pole holder 13 are indicated by broken lines in order to clarify the shape and mounting state of the stator poles 14. .

  The high-speed rotor 16 is substantially disk-shaped and has a bearing 56 at the center. A plurality of high-speed rotor magnets 17 whose planar shape is a partial ring shape are centered on the center hole of the bearing 56 on the surface facing the stator 15. Are installed side by side in a circular shape.

A plurality of power generation magnets 31 having a substantially trapezoidal planar shape are attached to the surface of the high-speed rotor 16 facing the rear plate 59 side by side in an annular shape centering on the central hole of the bearing 56.
In FIG. 2, in order to clarify the shape and mounting state of the power generation magnet 31, the shapes of several power generation magnets 31 among the plurality of power generation magnets 31 at the rear of the visual field of the high-speed rotor 16 are indicated by broken lines. .

  The rear plate 59 has a central hole 59b through which the rotation center shaft 53 is inserted substantially at the center, and a plurality of coil yokes 59a are arranged in an annular shape around the central hole 59b. A plurality of power generation coils 32 are attached to the plurality of coil yokes 59a, respectively, so that the plurality of power generation coils 32 are arranged in an annular shape around the central hole 59b on the surface of the rear plate 59 facing the high speed rotor 16.

  Since the generator 100 is in the assembled state, the input shaft 52 and the rotation center shaft 53 are concentric, so that a plurality of low-speed rotor magnets 12, stator poles 14, high-speed rotor magnets 17, power-generating magnets 31, and power-generating coils 32 are each in an annular shape. Are all in the same center. In addition, the average diameter of the annular shape of the low-speed rotor magnet 12, the stator pole 14, the high-speed rotor magnet 17, and the generator magnet 31 and the diameter of the center position of the coil yoke 59a are set to be substantially the same.

  Among the above components, the low speed rotor 11 having the low speed rotor magnet 12, the stator 15, and the high speed rotor 16 having the high speed rotor magnet 17 constitute a rotation speed increasing portion 80 by a magnetic gear mechanism, and is attached to the high speed rotor 16. The power generation section 90 is configured by the generated power generation magnet 31 and the power generation coil 32 attached to the rear side plate 59.

  With the above configuration, the generator 100 according to the present embodiment is attached to the high-speed rotor 16 that rotates at a high speed by the high-speed rotor 16 rotating at an increased speed according to the principle of operation of the magnetic gear when the input shaft 52 is rotationally driven from the outside. A large electromotive force is generated in the power generation coil 32 by the power generation magnet 31.

  Next, referring to FIG. 3 and FIG. 4, the magnet arrangement and the number of stator poles 14 of the low-speed rotor magnet 12 and the high-speed rotor magnet 17 and the magnet arrangement of the generator magnet 31 and the power generation coil of the generator according to the present embodiment. The relationship between the numbers of 32 will be described.

FIG. 3 is a view showing the arrangement of the magnets or poles of the main parts constituting the magnetic gear mechanism of the rotation speed increasing portion 80 of the generator 100. FIG. 3A shows the low speed rotor 11 to which a plurality of low speed rotor magnets 12 are attached. The figure which shows the magnet arrangement | sequence of the surface which opposes the stator 15, (c) is a figure which shows the magnet arrangement | positioning of the surface which opposes the stator 15 of the high speed rotor 16 to which the some high speed rotor magnet 17 was attached. FIG. 3B is a view showing a pole arrangement on the surface facing the low-speed rotor 11 and the surface facing the high-speed rotor 16 of the stator 15 in which a plurality of stator poles 14 are incorporated in the pole holder 13.
The pole arrangement of the stator 15 shown in FIG. 3B is substantially the same on the surface facing the low-speed rotor 11 and the surface facing the high-speed rotor 16, so that only one figure is shown.

  FIG. 4 is a diagram showing the arrangement of the magnets or coils of the main components constituting the power generation unit 90 of the generator 100. FIG. 4 (a) is opposed to the power generation coil 32 of the high-speed rotor 16 to which a plurality of power generation magnets 31 are attached. The figure which shows the magnet arrangement | positioning of a surface, (b) is a figure which shows the coil arrangement | positioning of the surface which opposes the high speed rotor 16 of the rear side plate 59 in which the some power generating coil 32 was attached.

  The plurality of low-speed rotor magnets 12 shown in FIG. 3A are arranged at equal intervals so that the polarities of adjacent magnets are opposite to each other. That is, as indicated by letters on the magnet surface in FIG. 3 (a), if the pole of a certain magnet is N, the magnet next to it is S and the magnet next to it is again N. . In addition, when the number of pole pairs of the plurality of low-speed rotor magnets 12 is represented as NL, in the case of Example 1 shown in FIG. 3A, there are 26 low-speed rotor magnets 12 in total, which is a 13-pole pair. = 13.

  The plurality of high-speed rotor magnets 17 shown in FIG. 3C are arranged at equal intervals so that the polarities of adjacent magnets are opposite to each other. That is, as described in letters on the magnet surface in FIG. 3 (c), if the pole of a certain magnet is N, the adjacent magnet is S, and the adjacent magnet is again N. . If the number of pole pairs of the plurality of high-speed rotor magnets 17 is expressed as NH, in the case of Example 1 shown in FIG. = 3.

  The plurality of stator poles 14 shown in FIG. 3B are arranged in a substantially annular shape at equal intervals. However, the stator pole 14 is a soft magnetic material and has no polarity. When the number of poles of the stator pole 14 is expressed as NS, in the first embodiment shown in FIG. 3B, the number of poles of the stator pole 14 is 16, and NS = 16.

In the magnetic gear mechanism of the type as described in the first embodiment, when the number of pole pairs of the low-speed rotor magnet is NL, the number of pole pairs of the high-speed rotor magnet is NH, and the number of poles of the stator is NS, NS = NL ± NH Need to be satisfied.
As described above, in Example 1, since NL = 13, NH = 3, and NS = 16, NS = NL + NH, and the relationship NS = NL ± NH is satisfied. As a result, the magnetic gear mechanism of the present embodiment performs rotational acceleration operation, and the acceleration ratio is NL / NH, and in the case of the first embodiment, 13/3 is 4.333.

  The plurality of power generation magnets 31 shown in FIG. 4A are arranged at equal intervals so that the polarities of adjacent magnets are opposite to each other. That is, as indicated by letters on the magnet surface in FIG. 4 (a), if the pole of a certain magnet is N, the adjacent magnet is S, and the adjacent magnet is again N. . Assuming that the number of pole pairs of the plurality of power generation magnets 31 is NM, in the case of Example 1 shown in FIG. 4A, the number of power generation magnets 31 is 16 in total, so that NM = 8.

  The plurality of power generation coils 32 shown in FIG. 4B are arranged on the rear plate 59 in a substantially annular shape at equal intervals. Assuming that the number of coils of the power generation coil 32 is NC, in the first embodiment shown in FIG. 4B, the number of power generation coils 32 is 12 and NC = 12.

  The high-speed rotor 16 to which the plurality of generator magnets 31 shown in FIG. 4A is attached is opposed to the rear side plate 59 to which the plurality of generator coils 32 shown in FIG. 4B are attached via a slight gap. When the high-speed rotor 16 is rotated, an alternating voltage is generated in each of the plurality of power generation coils 32.

  Among a plurality of power generation coils 32, a certain N-pole magnet, for example, of a plurality of power generation magnets 31 passes immediately above a certain power generation coil 32, and then the next S-pole magnet passes and further the next N-pole magnet. While the magnet passes, the change amount of the phase angle of the AC voltage generated in the power generation coil 32 is 360 °. Therefore, when the high-speed rotor 16 to which the generator magnet 31 having the number of pole pairs NM is attached makes one rotation, an AC voltage having a phase angle of 360 ° × NM is generated in each generator coil 32.

The plurality of power generation coils 32 are arranged on the rear plate 59 at equal intervals. The phase of the AC voltage generated in each power generating coil 32 is out of phase, and the phase difference between adjacent coils is a value obtained by dividing the phase angle generated during one rotation of the high-speed rotor 16 by the number of coils. Therefore, when the number of pole pairs of the generator magnet 31 is NM and the number of coils of the generator coil 32 is NC, the phase difference between adjacent coils is 360 ° × NM / NC.

  When three-phase alternating current is taken out as a power generation output, the phase difference of each phase of the three-phase alternating current is 240 °. Therefore, if the phase difference between adjacent coils is 240 °, the electromotive force can be taken out efficiently.

A phase difference between adjacent coils of 240 ° means that 360 ° × NM / NC = 240 °. Therefore, NM / NC = 240/360 = 2/3. From this, NM: NC = 2: 3 may be satisfied.

In the case of Example 1 shown in FIG. 4, since the generator magnet 31 is an 8-pole pair, NM = 8, and since the number of generator coils 32 is 12, NC = 12. Therefore, since NM: NC = 8: 12 = 2: 3, the phase difference between adjacent coils is 240 °, and three-phase alternating current can be efficiently extracted.

  In addition, since the phase difference between adjacent coils is 240 °, the phase difference between a certain power generation coil and the third power generation coil is 240 ° × 3 = 720 °, which is the same phase. Be in phase.

In this way, when the phase difference between adjacent coils is 240 °, the power generating coils are in phase every three points, that is, every two skips. Accordingly, among all the plurality of power generation coils, the two skipped power generation coils are all in phase.
A plurality of in-phase power generation coils can be connected in series, in parallel, or in series-parallel, and can be freely connected.

Three-phase alternating current can be efficiently extracted even at 120 ° and 480 °, in addition to the case where the phase difference between adjacent coils is 240 °. In these cases, 360 ° × NM / NC = 120 ° or 360 ° × NM / NC = 480 ° needs to be satisfied. From these relational expressions, NM: NC = 1: 3, or NM: NC = 4: 3
If so, three-phase alternating current can be taken out efficiently.

  From the above, by setting the ratio of the number of pole pairs NM of the generator magnet 31 and the number NC of the generator coils 32 to 2: 3, 1: 3, or 4: 3, the phase difference between adjacent coils becomes 120 ° or 240 °, Three-phase AC can be taken out without loss.

[Modification of Example 1]
FIG. 5 is a diagram showing an arrangement of magnets or coils of main components constituting the power generation unit 190 in a modification of the first embodiment. FIG. 5A shows the power generation coil 32 of the high-speed rotor 16 to which a plurality of power generation magnets 131 are attached. The figure which shows the magnet arrangement | positioning of the surface which opposes, (b) is a figure which shows the coil arrangement | sequence of the surface which opposes the high-speed rotor 16 of the rear side plate 59 in which the some power generating coil 32 was attached.

  In the modification of the first embodiment, the number of the plurality of power generation magnets 131 attached to the high speed rotor 16 is different from that in the first embodiment, but the rotation speed increasing portion by the magnetic gear mechanism and the plurality of power generation coils 32 are attached. The rear side plate 59 is the same as that of the first embodiment.

  In the modification of the first embodiment, as shown in FIG. 5A, the plurality of power generation magnets 131 are equally spaced so that the polarities of the magnets adjacent to the high-speed rotor 16 are opposite to each other, as in the first embodiment. It is arranged with. In the case of the modification of the first embodiment shown in FIG. 5A, the number of power generation magnets 131 is 12 and there are 6 pole pairs, so the number of pole pairs of the power generation magnet 131 is NM = 6.

When the high-speed rotor 16 to which the six-pole pair of generator magnets 131 is attached makes one rotation, an AC voltage having a phase angle of 360 ° × 6 = 2160 ° is generated in the generator coil 32. On the other hand, the number of coils of the power generating coil 32 is the same as that in the first embodiment, and the phase difference between adjacent coils is 2160 ° / 12 = 180 °.
It becomes. That is, the AC voltage generated in the adjacent power generation coil 32 is in the opposite phase. Therefore, if adjacent power generating coils 32 are connected with opposite polarities, single-phase alternating current can be efficiently extracted.

  Even when the phase difference between adjacent coils is 360 °, single-phase alternating current can be extracted efficiently. In this case, all the power generation coils 32 may be connected with the same polarity.

When the above content is described by a general formula, the phase angle of the AC voltage generated by one rotation of the high-speed rotor 16 is 360 ° × NM. Therefore, the phase difference between adjacent coils generated in the MC power generation coils 32 is 360 ° × NM / NC.
It becomes.

In order to take out the single-phase alternating current, the phase difference between the adjacent coils may be 180 ° or 360 °.
360 ° × NM / NC = 180 ° or 360 ° × NM / NC = 360 °
Should just hold. From these relational expressions, NM: NC = 1: 2, or NM: NC = 1: 1
If so, single-phase alternating current can be extracted efficiently.

  From the above, by setting the ratio of the number of pole pairs NM of the generator magnet 131 and the number NC of the generator coils 32 to 1: 2 or 1: 1, the phase difference between adjacent coils becomes 180 ° or 360 °, and there is no loss. Phase exchange can be taken out.

[Other Modifications of Embodiment 1]
Next, another modification of the first embodiment of the generator according to the present invention will be described with reference to FIGS. FIG. 6 is a perspective view showing a configuration of the generator 300 in which a part of the generator 300 according to another modification of the first embodiment is cut open. FIG. 7A is a cross-sectional view showing a laminated structure of a power generator 300 according to another modification of the first embodiment, and FIG. 7B is a partially enlarged view of a cross-sectional view for explaining the detailed configuration of the power generation unit 290.

  In another modification of the first embodiment, only the configuration of the power generation unit 290 is different from that of the first embodiment, and the rotation speed increasing unit 80 using the magnetic gear mechanism is the same as that of the first embodiment.

  In another modification of the first embodiment, as illustrated in FIG. 6, the power generation unit 290 includes a plurality of power generation coils 232, a plurality of power generation magnets 31, and a plurality of rear power generation magnets 234.

  As in the case of the first embodiment, the plurality of power generation magnets 31 are attached to the surface of the high-speed rotor 16 that faces the power generation coil 232 and arranged in a substantially annular manner at regular intervals. Further, the same number of rear power generation magnets 234 as the power generation magnets 31 are attached to the surface of the back yoke 251 facing the power generation coil 232 and arranged in a substantially annular manner at equal intervals, and the back yoke 251 is attached to the high speed rotor 16. It is fixed. As a result, the plurality of power generation magnets 31 and the plurality of rear power generation magnets 234 rotate together.

  The generator magnet 31 and the rear generator magnet 234 are both attached in a substantially annular shape, and the magnets of the generator magnet 31 and the rear generator magnet 234 are positioned at the same position in the circumferential direction. Mounted. That is, the plurality of generator magnets 31 and the plurality of rear generator magnets 234 are in the same position when viewed in plan view.

  Between the generator magnet 31 and the rear generator magnet 234, as shown in FIG. 6 and FIGS. 7A and 7B, the generator coils 232 are arranged on the coil substrate 235 in a substantially annular shape at equal intervals. A gap is provided between the generator magnet 31 and the generator coil 232, and between the rear generator magnet 234 and the generator coil 232. Further, as shown in FIG. 7B, the magnetic poles of the power generation magnet 31 and the rear power generation magnet 234 facing each other with the power generation coil 232 interposed therebetween are arranged so that the polarities are opposite to each other. That is, if the surface facing the power generation coil 232 of the power generation magnet 31 is the N pole, the surface facing the power generation coil 232 of the rear power generation magnet 234 at the same position is arranged to be the S pole.

  Since the polarity of the generator magnet 31 and the rear generator magnet 234 is arranged so that the magnetism is reversed between the generator coil 232, for example, the magnetic flux emitted from the N pole of the generator magnet 31 passes through the generator coil 232. Therefore, the magnetic flux can be used without waste, and efficient power generation is possible.

  As described above, in the other modification of the first embodiment, the structure of the power generation unit is greatly deformed. However, the number of pole pairs of the magnet of the low speed rotor, the number of pole pairs of the magnet of the high speed rotor, and the number of poles of the stator are independent. Since the logarithmic power generation magnet is attached to the high-speed rotor, it is possible to change the structure of the power generation unit without changing the rotation speed increasing unit by the magnetic gear mechanism.

  In addition, although the so-called coreless structure in which the yoke is not provided in the center of the power generation coil is illustrated in another modification of the first embodiment, a soft magnetic yoke or the like may be provided in the center of the power generation coil.

In the above-described first embodiment and the modification of the first embodiment and the other modification of the first embodiment, the configuration of the power generation unit is variously changed. However, in the present invention, the number of pole pairs of the power generation magnet is changed to that of the low-speed rotor magnet. Since the number of pole pairs, the number of pole pairs of the high-speed rotor magnet, and the number of poles of the stator can be set independently, it is possible to change the configuration of the power generation unit while keeping the same rotational acceleration unit.
Similarly, according to the present invention, it is possible to change the configuration of the rotation speed increasing unit while keeping the configuration of the power generation unit the same.

Hereinafter, with reference to FIG. 8 and FIG. 9, Example 2 of the generator which has a rotation speed increasing part which concerns on this invention is demonstrated in detail.
FIG. 8 is a diagram showing a schematic configuration of the present embodiment, in which (a) is a plan view and (b) is a central sectional view. FIG. 9 is a diagram for explaining the relationship between the magnet arrangement of the low-speed rotor magnet 312 and the high-speed rotor magnet 317 and the number of the stator poles 314 and the magnet arrangement of the generator magnet 331 and the number of the generator coils 332 of the generator according to the present embodiment. It is sectional drawing in a surface parallel to the top view of (a).

  As shown in FIG. 8, the generator 400 according to the present embodiment has a substantially circular cylindrical shape in plan view, and an input shaft 352 protrudes from a substantially center of a substantially circular front side plate 351, and each of the substantially cylindrical shapes. The components are stacked concentrically around the input shaft 352.

As shown in FIG. 8 (b), the front plate 351 shown in a substantially circular shape in FIG. 8 (a) has a hole at the center of the substantially disk-shaped upper surface, and the periphery of the hole largely protrudes downward. It becomes the cylinder part 351a to perform.
Two sliding bearings 355 and 356 are incorporated inside the cylindrical portion 351a, and the input shaft 352 is inserted into the inner diameter portion of the two sliding bearings 355 and 356. The input shaft 352 is rotatably held at a fixed position by the two sliding bearings 355 and 356 and the retaining member.

  A bottomed cylindrical low-speed rotor 311 is attached to the lower end side of the input shaft 352 protruding downward from the end of the cylindrical portion 351a of the front side plate 351. With this, when the input shaft 352 rotates, the low-speed rotor 311 also rotates.

  A ring yoke 318 is incorporated in the cylindrical outer diameter portion of the low speed rotor 311, and a plurality of low speed rotor magnets 312 are attached to the inner diameter surface of the ring yoke 318.

  A stator 315 including a plurality of stator poles 314 and a bottomed cylindrical pole holder 313 is disposed on the inner peripheral side of the low-speed rotor 311. The bottom of the pole holder 313 has a hole in the center, and this hole is attached to the tip of the cylindrical portion 351a of the front plate 351, whereby the stator 315 is fixed to the front plate 351.

  On the inner peripheral side of the stator 315, a substantially cylindrical high-speed rotor 316 is rotatably held by two ball bearings 357.

  A plurality of high-speed rotor magnets 317 are attached to the outer diameter surface of the high-speed rotor 316, and a plurality of power generation magnets 331 are attached to the inner diameter surface.

  On the inner peripheral side of the high-speed rotor 316, a substantially cylindrical coil back yoke 333 is held by the cylindrical portion 351 a of the front plate 351 so as not to rotate. The coil back yoke 333 has a plurality of projecting coil yokes 333a. A power generation coil 332 is attached to each of the plurality of coil yokes 333a, and an electromotive force is taken out from a coil lead (not shown) of each power generation coil 332.

  Next, a more detailed structure and operation of the generator 400 according to the second embodiment will be described with reference to FIG.

  As shown in FIG. 9, the generator 400 according to the present embodiment includes a ring yoke 318 made of a substantially cylindrical soft magnetic material inside a low-speed rotor 311 at the outermost periphery, and a plurality of ring yokes 318 have a plurality of inner surfaces. The low-speed rotor magnets 312 are arranged side by side in the circumferential direction with a slight gap at regular intervals.

The low-speed rotor magnet 312 is a magnet having a substantially trapezoidal cross section, and is arranged so that the magnetizing directions of adjacent magnets are opposite to each other. That is, as indicated by the white arrow in FIG. 9, when a magnetic flux is magnetized in a direction from the outer diameter side toward the center in a certain low speed rotor magnet 312, the adjacent low speed rotor magnet 312 has a magnetic flux outside the center. It is magnetized so as to go to the radial side.
In the second embodiment shown in FIG. 9, the number of the low-speed rotor magnets 312 is 56, that is, 28 pole pairs.

The stator 315 on the inner peripheral side of the low-speed rotor 311 has a substantially cylindrical shape and a non-magnetic pole holder 313, and a plurality of soft magnetic stator poles 314 are arranged in the circumferential direction at equal intervals with a gap therebetween. Yes.
The stator pole 314 has a substantially square cross section, and there is a slight gap, that is, a gap, between the outer peripheral surface of the stator pole 314 and the inner peripheral surface of the low speed rotor magnet 312.

  A high-speed rotor 316 made of a soft magnetic material and having a substantially cylindrical shape is disposed on the inner peripheral side of the stator 315. A plurality of high-speed rotor magnets 317 are arranged on the outer diameter surface of the high-speed rotor 316 in the circumferential direction at equal intervals with a gap therebetween, and the outer peripheral surface of the high-speed rotor magnet 317 and the inner peripheral surface of the stator pole 314 are arranged. There is a gap between them.

The high-speed rotor magnet 317 is a magnet having a partial ring shape in cross section, and is arranged so that the magnetizing directions of adjacent magnets are opposite to each other. That is, as indicated by the white arrow in FIG. 9, when a magnetic flux is magnetized in a direction from the outer diameter side to the center in a certain high speed rotor magnet 317, the adjacent high speed rotor magnet 317 has a magnetic flux outside the center. It is magnetized so as to go to the radial side. In FIG. 9, since the high-speed rotor magnet 317 is long in the circumferential direction, a plurality of white arrows indicating the magnetization direction are entered in one high-speed rotor magnet 317.
In the second embodiment shown in FIG. 9, the number of high-speed rotor magnets 317 is six, which is a three-pole pair.

The rotational speed increasing portion 380 of the generator 400 according to the present embodiment includes the low speed rotor 311 having the low speed rotor magnet 312, the stator 315 having the stator pole 314, the high speed rotor 316 having the high speed rotor magnet 317, and the like.
The stator 315 is fixed in the generator 400, and the low speed rotor 311 rotates with the input shaft 352. Further, the high-speed rotor 316 is increased to 28/3 = 9.333 times the rotation speed of the low-speed rotor 311 by the principle of operation of the magnetic gear, and rotates in the opposite direction.

  A plurality of power generation magnets 331 are attached to the inner diameter surface of the high-speed rotor 316 side by side in the circumferential direction at equal intervals with a gap. In addition, a substantially cylindrical coil back yoke 333 made of soft magnetic material is non-rotatably held on the inner peripheral side of the high speed rotor 316, and a plurality of power generation coils 332 are attached to the coil back yoke 333.

  The plurality of power generation magnets 331 and the plurality of power generation coils 332 constitute a power generation unit, and the power generation magnet 331 attached to the high-speed rotor 316 that is accelerated by the rotation speed increasing unit 380 and rotated is greatly increased in the power generation coil 332. Electric power is generated.

The generator magnet 331 is a magnet having a partial ring cross section, and is attached to the inner surface of the high speed rotor 316 so that the magnetizing directions of adjacent magnets are opposite to each other. That is, as indicated by a white arrow in FIG. 9, when the magnetic flux of a certain power generation magnet 331 is magnetized in the direction from the outer diameter side toward the center, the adjacent power generation magnet 331 has the magnetic flux from the center to the outer diameter side. It is magnetized so as to go to.
In the second embodiment shown in FIG. 9, the number of the generator magnets 331 is 16, which is an 8-pole pair.

A plurality of coil yokes 333a arranged at equal intervals in the circumferential direction project radially outward from the coil back yoke 333, and a power generation coil 332 wound in an oval shape is attached to each of the plurality of coil yokes 333a. An electromotive force is taken out from a coil lead (not shown) of the coil 332.
In the second embodiment shown in FIG. 9, the number of coil yokes 333a and the number of power generation coils 332 are both twelve.

  A gap is provided between the outer peripheral surface of the coil yoke 333 a and the inner peripheral surface of the power generation magnet 331.

  In Example 2 shown in FIG. 9, the number of pole pairs of the power generation magnet 331 is 8 pole pairs independent of the number of magnets of the magnetic gear mechanism, and the number of power generation coils 332 is twelve. As a result, the ratio of the number of pole pairs of the power generation magnet 331 and the number of power generation coils 332 is 8: 12 = 2: 3, and it is suitable for three-phase AC power generation by connecting every third power generation coil 332. AC electromotive force is obtained.

  As described above, in the generator 400 according to the second embodiment, as illustrated in FIG. 9, the components of the rotation speed increasing unit 380 are concentric with the low-speed rotor 311, the stator 315, and the high-speed rotor 316 in order from the outer diameter side. The power generation magnet 331 and the power generation coil 332 constituting the power generation unit 390 are stacked, and are further disposed on the inner peripheral side of the innermost peripheral high-speed rotor 316.

  By the way, in order to increase the maximum transmission torque as much as possible by the magnetic gear mechanism, it is advantageous to arrange the low-speed rotor magnet, the stator pole, and the high-speed rotor magnet at positions as far as possible from the center of rotation. For this reason, the low-speed rotor magnet, the stator pole and the high-speed rotor magnet are concentrated in the vicinity of the maximum diameter portion, and the components of the magnetic gear mechanism are often not disposed in the vicinity of the rotation center portion.

The generator 400 according to the present embodiment also includes the low-speed rotor 311 having the low-speed rotor magnet 312 that constitutes the rotation speed increasing portion 380 by the magnetic gear mechanism, the stator 315 having the stator pole 314, and the high-speed rotor magnet 317 for the reasons described above. A high-speed rotor 316 is disposed in the vicinity of the maximum diameter portion. On the other hand, the generator magnet 331 and the generator coil 332 constituting the power generation unit 390 are arranged further on the inner diameter side of the high-speed rotor 316 that is not used by the magnetic gear mechanism, and the generator outer shape is increased by incorporating the power generation unit. Avoided.
As a result, a generator having a rotation speed increasing part in which a power generation part is incorporated in a magnetic gear mechanism can be manufactured in a compact manner.

  Further, in the generator 400 according to the present embodiment, as shown in FIG. 8B, the low-speed rotor magnet center position CL1, which is the center position of the axial length of the low-speed rotor magnet 312 and the axial direction of the high-speed rotor magnet 317. The high-speed rotor magnet center position CL2 that is the center position of the length and the generator magnet center position CL3 that is the center position of the axial length of the generator magnet 331 are on the same line.

  In order to increase the maximum transmission torque as much as possible with the magnetic gear mechanism, it is advantageous to increase the area where the low-speed rotor magnet 312 and the high-speed rotor magnet 317 are opposed to each other as much as possible. In the generator 400 according to the present embodiment, the low-speed rotor magnet center position CL1 and the high-speed rotor magnet center position CL2 are on the same line, so that the area where the low-speed rotor magnet 312 and the high-speed rotor magnet 317 face each other is maximum if the magnet size is the same. Thus, a magnetic gear mechanism having a larger maximum transmission torque can be realized.

  In the generator 400 according to this embodiment, the low-speed rotor magnet center position CL1, the high-speed rotor magnet center position CL2, and the generator magnet center position CL3 are on the same line. As a result, it is possible to avoid that only one end of any one of the low-speed rotor magnet 312, the high-speed rotor magnet 317, or the power generation magnet 331 jumps out from the end of the other magnet. The generator 400 can be miniaturized.

  By the way, in the structure of the generator 400 according to the present embodiment, ideally, radial forces act equally on the plurality of low-speed rotor magnets 312 and the plurality of high-speed rotor magnets 317, and the low-speed rotor 311 and the high-speed rotor 316 have No radial force is generated, and no radial load is generated on the two sliding bearings 355, 356 and the two ball bearings 357.

  However, if the outer diameter size, radial position, magnetic force, or magnetic characteristics of the low-speed rotor magnet 312, the plurality of stator poles 314, and the plurality of high-speed rotor magnets 317 vary, the low-speed rotor magnet 312 or the high-speed rotor magnet 317 works. There is a difference in the radial force, which may cause a lateral pressure in the low speed rotor 311 or the high speed rotor 316.

  In the generator 400 according to the present embodiment, as shown in FIG. 8B, the low-speed rotor magnet center position CL1 is between the two sliding bearings 355 and 356 that rotatably hold the low-speed rotor 311. The high-speed rotor magnet center position CL2 is arranged so as to be between the two ball bearings 357 that hold the high-speed rotor 316 in a rotatable manner.

  Thus, even when a radial side pressure is generated in the low-speed rotor 311 or the high-speed rotor 316, the radial side pressure is shared by the two sliding bearings 355 and 356 and the two ball bearings 357, so that stable operation is achieved. realizable. Moreover, since it can avoid that the low speed rotor 311 and the high speed rotor 316 incline, the reliability of a generator can be improved more.

  As described above, the details of the present invention have been described with reference to the first and second embodiments. However, the present invention is not limited to the matters described in the first or second embodiment, and the general knowledge in the field of the present invention. Even if there is a design change within a range that does not depart from the gist of the present invention, including various modifications and corrections that can be conceived by those who have the above, they are included in the present invention.

  According to the present invention, it is possible to provide a generator that is small in size while having a rotation speed increasing portion and that does not require a change in the configuration of the generator even if the speed increasing ratio is changed.

DESCRIPTION OF SYMBOLS 11 Low speed rotor 12 Low speed rotor magnet 13 Pole holder 14 Stator pole 15 Stator 16 High speed rotor 17 High speed rotor magnet 31 Power generation magnet 32 Power generation coil 51 Front side plate 52 Input shaft 53 Rotation center shaft 54 Low speed rotor accommodating part 55 Bearing 56 Bearing 59 Rear side plate 59a Coil yoke 59b Central hole 80 Rotation speed increasing part 90 Power generation part 100 Power generator 131 Power generation magnet 190 Power generation part 232 Power generation coil 234 Rear side power generation magnet 235 Coil substrate 251 Back yoke 290 Power generation part 300 Power generator 311 Low speed rotor 312 Low speed rotor magnet 313 Pole holder 314 Stator pole 315 Stator 316 High speed rotor 317 High speed rotor magnet 318 Ring yoke 331 Generator magnet 332 Generator coil 333 Coil back yoke 333a Carp Yoke 351 Front plate 351a Tube portion 352 Input shaft 355 Sliding bearing 356 Sliding bearing 357 Ball bearing 380 Rotational speed increasing portion 390 Power generation portion 400 Generator 901 Generator main body 902 Turbine runner 903 Speed increasing mechanism 904 Generator 911 Water wheel 912 Rotor 913 High-speed rotor 914 Fixed part 915 Coil CL1 Low-speed rotor magnet center position CL2 High-speed rotor magnet center position CL1 Generator magnet center position

Claims (6)

A generator that is driven by rotation from the outside to generate electricity,
The generator has a rotation speed increasing portion for increasing the rotational drive, and a power generation portion for generating electricity by rotation,
A low-speed rotor having a plurality of pole-pair magnets; a high-speed rotor having a pole-pair magnet less than the magnet's pole-pair of the low-speed rotor; and a plurality of soft magnetism disposed between the low-speed rotor and the high-speed rotor Having a stator with a body pole;
NS = NL ± NH, where NL is the number of pole pairs of the magnet of the low-speed rotor, NH is the number of pole pairs of the magnet of the high-speed rotor, and NS is the number of poles of the stator.
When the low-speed rotor rotates, the high-speed rotor rotates at a speed that is increased by NL / NH times that of the low-speed rotor, and the rotation speed increasing portion by a magnetic gear mechanism;
In the generator having a rotation speed increasing part, having a power generation magnet that is rotated at a higher speed by the rotation speed increasing part, and the power generation part that is formed by a power generation coil that is generated by the rotation of the power generation magnet,
The generator magnet having the number of pole pairs independent of the number of pole pairs of the magnet of the low-speed rotor, the number of pole pairs of the magnet of the high-speed rotor, and the number of poles of the stator is attached to the high-speed rotor. A generator having a rotation speed increasing portion. When the number of pole pairs of the generator magnet is NM and the number of generator coils is NC, the ratio of the number of generator coils to the number of pole pairs of the generator magnet is:
NM: NC = 2: 3, or NM: NC = 1: 3, or NM: NC = 4: 3
The generator having a rotation speed increasing portion according to claim 1, wherein When the number of pole pairs of the generator magnet is NM and the number of generator coils is NC, the ratio of the number of generator coils to the number of pole pairs of the generator magnet is:
NM: NC = 1: 1 or NM: NC = 1: 2
The generator having a rotation speed increasing portion according to claim 1, wherein   The magnetic gear mechanism is a radial gap type in which the low-speed rotor, the stator, and the high-speed rotor are arranged concentrically, the high-speed rotor is arranged on the innermost periphery, and the power generation magnet is located inside the magnet of the high-speed rotor. The generator having the rotation speed increasing portion according to claim 1, wherein the generator is attached.   The center of the magnetic gear mechanism in the rotational axis direction of the magnet of the low-speed rotor, the center of the length of the high-speed rotor in the rotational axis direction of the magnet, and the length of the power generation magnet in the rotational axis direction The generator having a rotation speed increasing portion according to claim 4, wherein the centers are on the same line.   The low-speed rotor and the high-speed rotor are each rotatably held by two or more bearings separated in the rotation axis direction, the center of the length of the magnet in the rotation axis direction of the low-speed rotor, and the The generator according to claim 5, wherein the center of the length of the magnet in the direction of the rotation axis is between two or more of the bearings that hold each of the magnets.

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