JP2015050892A - Power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation system capable of obtaining high generation efficiency at a low revolution operation using the flow of a fluid.SOLUTION: A power generation system includes: a rotation section that has a plurality of blades provided between end marginal parts of an upper side support part and a lower side support part, each being fixed onto a rotation shaft, and rotates about the rotation shaft with the flow of a fluid being a driving source when disposed in the fluid; and a power generation section having a field section for generating a magnetic flux and an armature section provided with a plurality of coils interlinking with the magnetic flux. In the power generation section, one of the field section and the armature section is specified as a rotor and the other as a stator. The rotor of the power generation section is integrated with the rotation section. An inductive electric motive force is adapted to be generated by rotating the rotation section by the flow of the fluid at the armature section.

Description

  The present invention relates to a power generation system, and more particularly to a power generation system that generates power by rotating a fluid-mechanical energy conversion unit at a low speed.

  Since the Great East Japan Earthquake in 2011, needs for distributed power sources such as micro hydroelectric power generation systems and micro wind power generation systems have greatly increased. In particular, the concept of power consumption in local production for local consumption is positioned as an important concept, and development of an inexpensive and highly efficient power generation system is desired.

  As an example of such a distributed power source, a micro hydroelectric power generation system using a Darrieus type turbine as a drive source is already known (for example, see Non-Patent Document 1).

http://www.riam.kyushu-u.ac.jp/gikan/report/08/hydro_power.pdf

  While the rotation speed of the fluid-mechanical energy conversion unit of the conventional micro hydropower generation system and the micro wind power generation system is about several tens to several hundred rpm, many of the conventional general generators have a rotation speed exceeding 1000 rpm. It is designed to obtain high efficiency by operating at (rotational speed). Even if such a generator is operated at a rotational speed of several hundred rpm or less, it is difficult to obtain sufficient efficiency.

  In view of this point, there is an aspect in which the efficiency of the generator is increased by increasing the number of rotations applied to the generator by providing a speed increaser (gear) between the fluid-mechanical energy conversion unit and the generator.

  However, in the first place, the fluid energy density in hydroelectric power generation and wind power generation is very low compared to nuclear power generation and thermal power generation, so that there is a problem that the electric power obtained by the loss becomes small if it is through a gear.

  In addition, installing a high-speed generator near the user is problematic in terms of safety, and furthermore, generators for hydroelectric power generation and wind power generation are usually installed outdoors, Even if waterproofing is applied, the risk of failure, including the life of the bearing, increases.

  Non-Patent Document 1 discloses a configuration in which a generator for a bicycle is connected to a Darrieus-type turbine, but such a configuration has been proved that the power generation system can generate power. However, power generation with high power generation efficiency is not necessarily realized.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a power generation system that generates electric power using a fluid flow, and that can achieve high power generation efficiency with low rotation operation.

  In order to solve the above-described problem, a first invention is a power generation system that generates electric power by using a fluid flow, and is a rotating unit that is disposed in the fluid and rotates about a rotation axis using the fluid flow as a driving source. And a power generation section provided with a field section for generating magnetic flux and an armature section provided with a plurality of coils interlinking with the magnetic flux. In the power generation section, the field section and the electric machine One of the child parts is a rotor and the other is a stator, the rotor of the power generation part is provided integrally with the rotating part, and the rotating part is rotated by the flow of the fluid. An induced electromotive force is generated in the armature portion.

  A second invention is the power generation system according to the first invention, wherein the rotating parts are fixed to the rotating shafts, respectively, and both of the upper supporting part and the lower supporting part are formed in a disk shape. And a plurality of blades provided between an end edge portion of the upper support portion and an end edge portion of the lower support portion, and the plurality of blades receive at least one of lift or drag from the fluid. The rotating part is rotated by obtaining.

  A third invention is the power generation system according to the first or second invention, wherein the field part is the rotor and the armature part is the stator.

  A fourth invention is a power generation system according to the third invention, wherein the field magnet part is a disk-like permanent magnet provided integrally with the rotating part so as to be orthogonal to the rotating shaft at a central position. It is characterized by that.

  A fifth invention is the power generation system according to the fourth invention, wherein the field magnet part forms part of the rotating part.

  A sixth invention is the power generation system of the third invention, wherein the field magnet portion includes a plurality of permanent magnets having a north pole and a south pole along a circumferential direction on a side portion or an upper surface portion of the rotating portion. It is provided by arranging in rows so as to be alternately arranged.

  A seventh invention is the power generation system of the first or second invention, wherein the field part is the stator and the armature part is the rotor.

  An eighth invention is the power generation system according to any one of the third to seventh inventions, wherein the direction of the magnetic flux generated in the field portion and the direction of the central axis of each of the plurality of coils are the extension of the rotating shaft. It is characterized in that it coincides with the current direction.

  A ninth invention is the power generation system according to any one of the third to seventh inventions, wherein each of the plurality of coils has the field such that a central axis direction is orthogonal to an extending direction of the rotating shaft. It is characterized by being arranged in an outer peripheral position of the magnetic part.

  A tenth aspect of the present invention is the power generation system according to any one of the first to ninth aspects, wherein in the power generation unit, the rotational speed of the rotor that maximizes efficiency and output is 50 rpm to 1000 rpm. It is characterized by.

  According to the first to tenth inventions, a power generation system capable of generating power with high efficiency and high output while using a flow of fluid such as a water flow in a river or a flow of air (natural wind) as a driving source of a rotating unit. Can be realized.

1 is a diagram conceptually showing the configuration of a power generation system 1. FIG. It is a lineblock diagram of power generation system 1 in which power generation part 1B has constituted an axial gap type. It is a block diagram of the electric power generation system 1 in which the electric power generation part 1B has comprised the radial gap type | mold. It is sectional drawing of the electric power generation system 1 perpendicular | vertical to the longitudinal direction of the blade | wing 7 in the case where the blade | wing 7 has a shape suitable for improving the rotation efficiency of 1 A of rotation parts more. It is a figure which shows the example of installation in the case of using the electric power generation system 1 provided with the housing | casing 20 for hydroelectric power generation. It is a graph which shows the change of the relationship between the rotation speed N and the output P about a Darrieus type water turbine which has the same composition as rotation part 1A of power generation system 1. It is a graph which shows the relationship between the rotation speed in the electric power generation part 1B at the time of giving predetermined rotation to the field magnet part 9, and maximum efficiency. It is a graph which shows the relationship between the rotation speed in the electric power generation part 1B at the time of giving predetermined rotation to the field magnet part 9, and an output.

  FIG. 1 is a diagram conceptually showing the configuration of a power generation system 1 according to an embodiment of the present invention. The power generation system 1 roughly rotates the rotating unit 1A provided on the base 2 using a fluid flow such as a water flow in the river or an atmospheric flow (natural wind) as a drive source, and the rotating unit 1A Three-phase AC power generation is performed in the power generation unit 1B by the rotational force.

  FIG. 2 is a configuration diagram of the power generation system 1 in which the power generation unit 1B is an axial gap type, and FIG. 3 is a configuration diagram of the power generation system 1 in which the power generation unit 1B is a radial gap type. 2 and 3 are right-handed XYZ in which the directions orthogonal to each other in the horizontal plane are the X-axis direction and the Y-axis direction, and the vertical direction that is also the extending direction of the rotation shaft 4 (described later) is the Z-axis direction. Coordinates are attached. More specifically, FIG. 2A shows a front view of the axial gap type power generation system 1, and FIG. 2B shows a side surface of the same power generation system 1 perpendicular to the X axis. FIG. FIG. 3 is a side view perpendicular to the X-axis of the radial gap type power generation system 1. The front view of the radial gap type power generation system 1 is the same as FIG.

  The rotating portion 1A is supported by the bearing 3 at the upper and lower ends (however, only the upper end side is shown in FIG. 1), and is fixed to the rotating shaft 4 respectively. The upper support portion 5 and the lower support portion 6 that are formed, and the plurality of blades 7 provided between the end edge portion of the upper support portion 5 and the end edge portion of the lower support portion 6 immediately below the upper support portion 5 are mainly used. Prepare. The rotating unit 1A has a configuration of a so-called Darius type vertical axis type water turbine or wind turbine.

  More specifically, the upper support portion 5 and the lower support portion 6 are parallel to each other at different positions between the upper and lower end portions of the rotation shaft 4 and the respective center positions are fixed with respect to the rotation shaft 4. It is provided so that it may become a setting position.

  Further, the wings 7 have a shape along the circumferential direction at equal intervals in the circumferential direction of the edge portions of the upper support portion 5 and the lower support portion 6, and upper and lower ends of the wings 7 are connected to the upper support portion 5. It is provided in a manner of being fixed to the lower support portion 6.

  In the blade 7, at least one of lift and drag is generated when a fluid flow is received. When such lift or the like is generated, a torque around the rotation shaft 4 is generated in the entire rotation unit 1A, and when the magnitude exceeds a predetermined threshold value, the rotation unit 4 is rotatably supported by the bearing 3. 1A rotates in the direction in which the torque acts. FIG. 1 illustrates a case where the rotating unit 1A rotates counterclockwise as indicated by an arrow AR.

  The shape and the number of the blades 7 are preferably determined so that the rotation of the rotating unit 1A occurs as efficiently as possible, in other words, the rotating unit 1A can easily rotate even if the fluid flow is weak. Therefore, FIG. 1 illustrates a case where the rotating unit 1A includes three blades 7 and FIGS. 2 and 3 illustrate a case where the rotating unit 1A includes five blades 7, respectively. The number of arrangements is not limited to these.

  In FIG. 1, for simplicity of illustration, the wing 7 has a rectangular shape in plan view (uniform thickness), but the shape (cross-sectional shape) of the wing 7 is not limited thereto. FIG. 4 is a cross-sectional view of the power generation system 1 perpendicular to the longitudinal direction of the blade 7 when the blade 7 has a shape suitable for further improving the rotation efficiency of the rotating unit 1A. The blade 7 shown in FIG. 4 is a tangent to a circle R that becomes the orbit of the blade 7 when the rotating portion 1A rotates (substantially coincides with the edge portions of the upper support portion 5 and the lower support portion 6 in the horizontal plane). Axisymmetrical with respect to T, the front end side in the advancing direction is a curved surface with a predetermined radius of curvature, while the rear end side has an acute angle, and the front end side is rearward with respect to the tangent line T. It has a shape swollen more than the end side. In the illustration of FIG. 4, it is assumed that the rotating part 1A rotates counterclockwise as indicated by the arrow AR in response to receiving the water flow F from the upstream side on the left side in the drawing. It will go around the circle R counterclockwise.

  Of the rotating part 1A, the upper support part 5, the lower support part 6, the wings 7 and the like are preferably made of, for example, plastic, aluminum, stainless steel, etc., metal having excellent corrosion resistance and weather resistance, and industrial resin. is there. The rotating shaft 4 and the bearing 3 are preferably made of metal (made of steel).

  The power generation unit 1 </ b> B mainly includes a field magnet unit 9 and an armature unit 10. In the power generation system 1 according to the present embodiment, the field portion 9 is provided integrally with the upper support portion 5 of the rotating portion 1A. More generally speaking, the field portion 9 is provided as a rotor (rotor) that rotates integrally with the rotating portion 1A.

  More specifically, as illustrated in FIG. 1, the power generation system 1 includes an N pole 9 n and an S pole 9 s that form a field portion 9 on at least one of a side portion and an upper surface portion of the disk-shaped upper support portion 5. Are repeatedly arranged alternately in the circumferential direction. The field magnet portion 9 may be configured by, for example, a single disk-shaped permanent magnet that alternately includes N poles 9n and S poles 9s along the circumferential direction, and a plurality of minute permanent magnets may be The N pole 9n and the S pole 9s may be arranged in a row along the circumferential direction on the side or upper surface of the support portion 5 so as to be arranged alternately. In the former case, the disk-shaped permanent magnet itself may constitute the upper support portion 5. That is, the field part 9 may form a part of the rotating part 1A. FIG. 1 illustrates such an embodiment.

  On the other hand, the armature part 10 is provided coaxially with the upper support part 5 of the rotating part 1A as a stator (stator) for the field part 9 as a rotor, and its central part is the rotating part 1A. One bearing 3 of the rotating shaft 4 is provided. The other bearing 3 is provided on the base 2.

  In addition, since the specific configuration modes are various, illustration is omitted in FIG. 1, but as illustrated in FIGS. 2 and 3, in the armature portion 10, at equal intervals along the circumferential direction, A plurality of core teeth 10A are arranged in a row, and coils 10B for each of the three phases (u phase, v phase, w phase) are ticketed on each of the core teeth 10A. The coil 10B is made of a conductive material such as a copper wire or an aluminum wire. Moreover, from the armature part 10, the leader line 11 (11u, 11v, 11w) corresponding to each phase is drawn out.

  More specifically, the iron core teeth 10A and the coil 10B are arranged such that the direction of the magnetic flux in the magnetic poles (S pole 9s and N pole 9n) of the field portion 9 and the central axis direction of the coil are such that the coil 10B is linked to the magnetic flux. Is arranged opposite to the field magnet portion 9 so as to match. For example, in the case of the axial gap type power generation system 1 shown in FIG. 2, since the direction of the magnetic flux coincides with the Z-axis direction, the coil 10B is ticketed on the iron core teeth 10A extending in the Z-axis direction. Become. That is, the central axis direction of the coil 10B also coincides with the Z-axis direction.

  On the other hand, in the case of the radial gap type power generation system 1 shown in FIG. 3, the field portion 9 has a disk shape so that the direction of the magnetic flux is centered around the rotation axis 4 in the XY plane. Since the coil 10B is oriented in the radial direction (direction perpendicular to the rotation axis 4) 9 in the same XY plane as the field part 9, the coil 10B extends in the radial direction to the outer peripheral position of the field part 9. The iron core teeth 10A arranged in a row are ticketed. That is, the central axis direction of the coil 10 </ b> B also coincides with the radial direction of the field portion 9.

  However, the configuration of the power generation system 1 shown in FIGS. 2 and 3 is merely an example. For example, the power generation system 1 has a configuration of an axial gap type while using a disk-shaped permanent magnet as the field magnet portion 9. Alternatively, the magnetic field portion 9 may be configured by a plurality of permanent magnets, but may have a radial gap type configuration.

  In addition, at least the iron core teeth 10 </ b> A and the coil 10 </ b> B of the armature portion 10 are subjected to waterproofing treatment. For example, the waterproofing process by resin coating is performed.

  In both cases illustrated in FIGS. 2 and 3, the power generation system 1 is housed in the housing 20. The lower part of the housing 20 also serves as the base 2, and the armature part 10 (for example, the iron core teeth 10 </ b> A) is supported from above and from the upper part thereof. As shown in FIGS. 2B and 3, a U-shaped recess 20 </ b> B is formed on one side of the housing 20 (one of the sides perpendicular to the X axis in FIGS. 2 and 3). As shown in FIG. 2A, a rectangular opening 20A is provided in the vicinity of the center of the bottom portion of the recess 20B. Thereby, the wing | blade 7 located in the recessed part 20B becomes the aspect which protrudes to the outer side of the housing | casing 20 from the opening part 20A.

  FIG. 5 is a diagram illustrating an installation example when the power generation system 1 including the casing 20 is used for hydroelectric power generation. 5 illustrates the case where the radial gap type power generation system 1 illustrated in FIG. 3 is installed, but the same applies to the case where other power generation systems 1 are installed.

  Although detailed illustration is omitted in FIG. 5, the power generation system 1 supports the base 2 from the outside by placing it directly on the bottom T of the water channel or by suspending it with a wire or the like. Or in a mode in which both are used in combination. In such a case, as shown in FIG. 5, the power generation system 1 including the housing 20 has a mode in which the side portion (the front side of the power generation system 1) provided with the opening 20 </ b> A and the recess 20 </ b> B faces the upstream side of the fluid. Installed. This is because the fluid flows into the inside of the housing 20 through the opening 20A, so that the blades 7 other than the recess 20B can be rotated more easily. The installation location of the power generation system 1 is not limited to the inclined water channel as shown in FIG. 5, and is a mode in which the power generation system 1 is installed and used in a vertical water pipe in which water flows from the upper side to the lower side. Also good.

  When the power generation system 1 is disposed in the fluid in the manner illustrated in FIG. 5, the blades 7 receive a fluid flow (illustrated by arrows in FIG. 5) to generate torque in the rotating unit 1 </ b> A. As a result, the entire rotating portion 1A, in which the rotating shaft 4 is pivotally supported by the bearing 2 provided in the base 2 and the armature portion 10, rotates as indicated by an arrow AR.

  Since the field support section 9 of the power generation section 1B is integrally provided on the upper support section 5 of the rotation section 1A, the field passing through the coil provided in the armature section 10 by the rotation of the rotation section 1A. The magnetic flux from the magnetic part 9 changes over time. Thereby, an induced electromotive force is generated in each coil. That is, the power generation system 1 is driven. This is a schematic mechanism of power generation in the power generation system 1.

  However, in general, the number of rotations obtained by rotating the rotating part of the water turbine or wind turbine using a water flow in a river or an air flow (natural wind) as a drive source is about several tens to several hundreds rpm at most. Moreover, it has been experimentally confirmed that a higher output is not necessarily obtained as the rotational speed is larger.

  For example, FIG. 6 shows a low speed for wind power generation as a generator for evaluation in a Darrieus type turbine (the field support portion 9 is not provided in the upper support portion 5) having the same configuration as the rotating portion 1A of the power generation system 1.・ Connect a small generator (not optimized for power generation by rotation of fluid) and immerse the Darrieus water turbine in a test duct (depth 280 mm, width 300 mm) to flow the water flow in the duct It is a graph which shows the change of the relationship between the rotation speed N (unit: rpm) and the output P (unit: W) when Q (unit: l (liter) / s) is changed. The results shown in FIG. 6 indicate that there is a maximum output value (peak) in the range of at least 100 rpm to 200 rpm. In addition, although the said is test data in a duct, the same tendency is shown also in the open water channel open | released by air | atmosphere.

  However, when the power generation system 1 is actually used in a river or the like, it is essential that the flow velocity of the fluid in the flow path varies greatly depending on the environment, and the power generation system 1 is designed to be suitable for such environmental conditions. Should. In view of this point, it is preferable that the power generation system 1 that assumes power generation by the flow of fluid can obtain high efficiency and high output within the range of the rotation speed of 50 rpm to 1000 rpm in the power generation unit 1B. For that purpose, it can be said that it is preferable to match the maximum efficiency rotation speed of the rotating section 1A with the maximum efficiency rotation speed of the power generation section 1B.

  In view of this point, in the power generation system 1 according to the present embodiment, the upper support portion 5 of the rotating portion 1A and the field portion 9 of the power generation portion 1B are provided integrally, and the armature portion 10 of the power generation portion 1B. Further, by providing one of the bearings 3 which are bearings of the rotating shaft 4 of the rotating part 1A, the rotating part 1A is rotated as it is and the field part 9 in the power generating part 1B is rotated. That is, the power generation system 1 is configured such that the number of rotations in the rotating unit 1A is equal to the number of rotations of the field magnet unit 9 of the power generating unit 1B. In such a case, since no mechanical energy transmission element such as a speed increasing gear is interposed between the rotating part 1A and the power generation part 1B, there is no loss caused by the element.

  In general, the output of the generator is given by the following equation.

(Output) = (rotor volume) x (effective ampere turn of armature winding (= current x number of turns): electrical loading) x (gap magnetic flux density: magnetic loading) x (number of revolutions)
When the rotational speed is low, an excitation current sufficient to increase the magnetic flux cannot be obtained, so that the output decreases as a whole.

  On the other hand, in order to compensate for the decrease in magnetic flux by increasing the number of permanent magnets, it is necessary to use multiple poles. However, if the number of poles is increased too much, the amount of magnetic flux around each pole decreases and the magnetic flux passes. In order to secure the magnetic path, the iron core teeth are thickened, and the physique of the generator is increased.

  Therefore, in the power generation section 1B of the power generation system 1 according to the present embodiment, the field section is larger than a multipolar generator generally used to maintain efficiency even at a rotational speed lower than 1000 rpm. While the amount of the permanent magnets used for 9 is relatively reduced, the number of turns of the coil 10B (that is, electrical loading) is relatively increased, thereby improving the characteristics at low speed. Generally speaking, it can be said that the power generation system 1 according to the present embodiment has a higher ratio of (electric loading) to (magnetic loading) than a general generator.

  FIG. 7 is a graph showing the relationship between the rotational speed (Rotation Speed, unit: rpm) and the maximum efficiency (Efficiency, unit:%) in the power generation unit 1B when a predetermined rotation is applied to the field magnet unit 9. FIG. 8 is a graph showing the relationship between the rotation speed (Rotation Speed, unit: rpm) and the output (Output Power, unit: W) in the power generation unit 1B in the same case. In either case, as a constituent material of the iron core teeth 10A, there are two cases: a case where a silicon steel plate is used, and a case where SPCC (cold rolled steel plate), which is considered to be less likely to cause iron loss than a silicon steel plate, is used. The evaluation results are shown. In either case, the load was 150Ω. Moreover, what has a radial type | mold structure was used as the electric power generation part 1B.

  From the graph of FIG. 7, in the low speed rotation range of 50 to 200 rpm, the maximum efficiency increases as the rotation speed increases, but the increase rate gradually decreases, and tends to saturate around 150 rpm. I understand that. In particular, when a silicon steel sheet is used for the iron core teeth 10A, the maximum efficiency of about 85% is obtained even at 50 rpm, and the maximum efficiency reaches about 91% at 200 rpm. On the other hand, when SPCC is used for the iron core teeth 10A, the maximum efficiency of 81% is realized even at 50 rpm, although the value is inferior to that when using a silicon steel plate, and it is less than 90% at 200 rpm. A value comparable to that of a silicon steel plate is obtained.

  On the other hand, it can be seen from the graph of FIG. 8 that in the low speed rotation range of 50 to 200 rpm, the output increases as the rotation speed increases, and the increase rate tends to gradually increase. The output value is about 250 W at 100 rpm, just over 500 W at 150 rpm, and about 1000 W at 200 rpm. It can also be seen that there is almost no difference in output between the silicon steel plate and SPCC.

  The results shown in FIGS. 7 and 8 mean that the power generation unit 1B capable of obtaining high efficiency and high output at low speed rotation of at least about 100 rpm to 200 rpm is realized. The range of the rotational speed is the same as the rotational speed range in which the output is maximum in the rotating unit 1A in the experiment with the experimental duct illustrated in FIG. This means that high-efficiency and high-output power generation is possible while using a flow of water or natural wind as a drive source for the rotating unit 1A. Note that, as described above, in an actual use situation, it is assumed that the rotating unit 1A that has received the flow of water or natural wind rotates at a rotational speed in the range of 50 rpm to 1000 rpm. It is only necessary to obtain a sufficiently large maximum efficiency within the range of the rotational speed by appropriately adjusting the specific configuration requirements of each part, and this is actually possible.

  Moreover, that the difference by the material of 10 A of iron core teeth is small means that the structure of the electric power generation system 1 which concerns on this Embodiment is hard to produce the iron loss in 10 A of iron core teeth. Thereby, in the electric power generation system 1, even if it is a case where SPCC cheaper than a silicon steel plate is used, it becomes possible to implement | achieve high efficient and high output electric power generation.

  As described above, according to the present embodiment, the rotating unit having the maximum output value (peak) under a relatively low rotational speed of 50 rpm to 1000 rpm, and high efficiency in the range of the rotational speed, By constructing a power generation section capable of generating power at high output so that the field section provided in the latter is integrated with the rotating section, fluid such as water flow in the river and atmospheric flow (natural wind) It is possible to realize a power generation system capable of generating power with high efficiency and high output while using this flow as a drive source for the rotating part.

<Modification>
The power generation system 1 illustrated in FIGS. 1 to 3 in the above embodiment has a vertical axis configuration in which the extending direction of the rotary shaft 4 is perpendicular to the fluid flow direction. 1 may have a horizontal axis type configuration in which the flow of the fluid and the extending direction of the rotating shaft 4 coincide with each other. In such a case, the configuration of each part including the shape and arrangement of the blades 7 may be appropriately configured to suitably achieve high efficiency and high output in the horizontal axis type.

  Moreover, in the above-mentioned embodiment, although the electric power generation system 1 is demonstrated as what performs a three-phase alternating current electric power generation, instead of this, you may perform the electric power generation by a single phase, 3n phase ( n: a natural number). In such a case, the armature unit 10 may be configured such that high efficiency and high output are realized in each case.

  Moreover, in the above-mentioned embodiment, although it has become the aspect which forms the field part 9 with a permanent magnet, the aspect which comprises the field part 9 with a DC electromagnet instead may be sufficient.

  In the above-described embodiment, the armature part 10 is a stator and the field magnet part 9 is a rotor that rotates integrally with the rotating part 1A. Instead, the field magnet part 9 May be a stator, and the armature portion 10 may be a rotor that rotates integrally with the rotating portion 1A.

DESCRIPTION OF SYMBOLS 1 Power generation system 2 Base 3 Bearing 4 Rotating shaft 5 Upper support part 6 Lower support part 7 Wing 8 Rotating shaft 9 Field part 10 Armature part 10A Iron core teeth 10B Coil 1A Rotating part 1B Power generating part 20 Housing 20A Opening part 20B Concave part F Water flow T Bottom

Claims (10)

A power generation system that uses a fluid flow to generate power,
A rotating unit that is disposed in the fluid and rotates about the rotation axis using the flow of the fluid as a driving source;
A power generation unit comprising a field part for generating magnetic flux and an armature part provided with a plurality of coils interlinked with the magnetic flux;
Have
In the power generation part, one of the field part and the armature part is a rotor and the other is a stator.
The rotor of the power generation unit is provided integrally with the rotation unit,
Generating an induced electromotive force in the armature portion by rotating the rotating portion by the flow of the fluid;
A power generation system characterized by that. The power generation system according to claim 1,
The rotating part is
An upper support portion and a lower support portion, each fixed to the rotating shaft, both having a disk shape;
A plurality of wings provided between an end edge portion of the upper support portion and an end edge portion of the lower support portion, and
The plurality of wings rotate the rotating unit by obtaining at least one of lift and drag from the fluid;
A power generation system characterized by that. The power generation system according to claim 1 or claim 2,
The field part is the rotor, and the armature part is the stator;
A power generation system characterized by that. The power generation system according to claim 3,
The field portion is a disk-like permanent magnet provided integrally with the rotating portion so as to be orthogonal to the rotating shaft at a center position.
A power generation system characterized by that. The power generation system according to claim 4,
The field portion forms part of the rotating portion;
A power generation system characterized by that. The power generation system according to claim 3,
The field portion is provided by arranging a plurality of permanent magnets in such a manner that N poles and S poles are alternately arranged along a circumferential direction on a side portion or an upper surface portion of the rotating portion.
A power generation system characterized by that. The power generation system according to claim 1 or claim 2,
The field part is the stator, and the armature part is the rotor;
A power generation system characterized by that. The power generation system according to any one of claims 3 to 7,
The direction of magnetic flux generated in the field portion and the central axis direction of each of the plurality of coils coincide with the extending direction of the rotating shaft,
A power generation system characterized by that. The power generation system according to any one of claims 3 to 7,
Each of the plurality of coils is arranged in a row at the outer peripheral position of the field portion such that the central axis direction is orthogonal to the extending direction of the rotating shaft.
A power generation system characterized by that. The power generation system according to any one of claims 1 to 9,
In the power generation unit, the rotational speed of the rotor that maximizes efficiency and output is 50 rpm to 1000 rpm.
A power generation system characterized by that.