JP2016010271A - Power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove a housing from a body part.SOLUTION: A power generation device 10 includes: a rotary body 13; a housing 12; a support post 11; and a generator 100 including a stator 17 for power generation and a rotor 14 for power generation, and feeds generated power to the outside via a power cable 102 connected to the stator 17 for power generation. The power generation device 10 also includes a power generation section 101 in addition to the generator 100. The power generation section 101 includes a rotor 15 for excitation, and a stator 18 for excitation which generates a rotary magnetic field for the rotor 15 for excitation on the basis of power supply from a power transmission station 103. In the housing 12, the rotor 14 for power generation and the rotor 15 for excitation are disposed side by side in an axial direction of the rotary body 13 and incorporated so as to be rotatable integrally with the rotary body 13. In the support post 11, the stator 17 for power generation and the stator 18 for excitation are disposed side by side oppositely to the corresponding rotors respectively.

Description

  The present invention relates to a power generator.

  In recent years, power generation devices that generate power using ocean currents or tidal currents have attracted attention. As this type of power generation device, for example, there is a power generation device described in Patent Document 1. The power generation device of Patent Document 1 is a submarine power generation device, a wing serving as a receiving portion that rotates around a shaft portion due to an ocean current or a tidal current, a generator coupled to the shaft portion of the wing, It has a nacelle as a housing that houses the generator inside. The nacelle is supported by a column as a main body fixed to the seabed.

JP 2012-2203 A

  In the power generation device of Patent Literature 1, when the maintenance of the nacelle or a component provided in the nacelle fails, it is necessary to remove the nacelle from the support column and take it out from the sea. Here, in the specification using wired power transmission to transmit the electric power generated by the generator to the outside, it is difficult to remove the nacelle from the column because the wiring passes between the nacelle and the column. Of course, if the power generated by the generator is wirelessly transmitted to the outside, the wiring between the nacelle and the support can be eliminated, but this makes it difficult to avoid loss of the generated power. This type of problem can occur not only in power generation devices that generate power using ocean currents or tidal currents, but also in power generation devices that generate power using wind power.

  This invention is made | formed in view of such a situation, The objective is to provide the electric power generating apparatus which can remove a housing easily from a main-body part.

  A power generation device that solves the above problems includes a receiving portion that rotates by receiving a fluid flow, a housing to which the receiving portion is attached, a main body portion to which the housing is attached and detached, a primary side stator, and a secondary side. A generator using a winding induction machine having a side rotor, and transmits the electric power generated by the generator to the outside through a transmission line connected to the primary side stator. Further, the power generation device includes a power generation unit provided separately from the generator. The power generation unit includes a winding type rotor and a winding type stator that generates a rotating magnetic field for the winding type rotor based on power feeding from a predetermined power feeding unit. In addition, the housing includes a secondary rotor and a wound rotor arranged side by side in the axial direction of the receiving portion, and each rotor is incorporated so as to rotate integrally with the rotation of the receiving portion. In the main body, a primary side stator and a wound stator are arranged side by side so as to face the corresponding rotors.

  According to the above configuration, the electric power generated using the winding induction machine is transmitted to the outside through the primary side stator provided in the main body. That is, when it comes to power generation, wired power transmission that passes through the housing and the main body is not used to transmit the generated power to the outside, so when removing the housing from the main body, the wiring between the housing and the main body No consideration is required. Naturally, since the wireless power transmission is not used to transmit the generated power to the outside, the loss of the generated power is also suppressed.

  In addition, in a power generation apparatus using a wound induction machine, a power generation unit having a wound rotor and a wound stator can be separately provided to generate a rotating magnetic field for the secondary rotor to excite it. it can. And according to such a structure, about a power generation part, a winding type | mold rotor can be provided in a housing side and a winding type | mold stator can respectively be provided in a main body part side, When removing a housing from a main body part, between a housing and a main body part No need to consider wiring. Therefore, in the power generation device using the winding induction machine, the housing can be easily detached from the main body.

In the power generator, the wound stator is preferably connected to a power transmission line.
According to the above configuration, the power used by the wound stator to generate a rotating magnetic field in the wound rotor is the power that flows through the transmission line, and can be said to be the power that is generated by the power generator and transmitted to the outside. In this way, the frequency fed to the wound stator via the transmission line is kept constant. As a result, the wound rotor rotates the rotating magnetic field according to the difference between the speed of the wound rotor at that time and the speed of the rotating magnetic field necessary to generate the power fed from the transmission line. Generate on the side rotor. Then, in the secondary side rotor, the speed of the rotating magnetic field generated by the secondary side rotor with respect to the primary side stator is adjusted to a constant value, that is, a frequency required by the power transmission line. As a result, fluctuations in the speed of the rotating magnetic field generated by the secondary rotor with respect to the primary stator are suppressed, and fluctuations in the frequency of the electric power generated through the primary stator are suppressed. Therefore, a separate configuration or process for adjusting the frequency of the generated power, for example, a process related to an inverter or a converter can be omitted.

Moreover, it is preferable to provide the adjustment part which adjusts the power factor of the electric power transmitted to a power transmission line through a primary side stator in a power generator.
By the way, about the electric power transmitted to a transmission line through a primary side stator, the power factor may fall because the phase of the electric current and voltage shifts. Therefore, as in the above configuration, the power transmission efficiency can be improved by configuring the power factor of the power transmitted to the transmission line through the primary stator so as to be adjustable.

  As a method for configuring such an adjustment unit, it is conceivable to shift either the primary side stator or the winding type stator in the main body portion in the circumferential direction. According to this configuration, the configuration of the adjustment unit can be completed within the main body, and the efficiency of power transmission can be improved without hindering the effect of easily removing the housing from the main body.

  According to the present invention, the housing can be easily detached from the main body.

The figure which shows the outline of a power generator. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1 and particularly shows a generator. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1 and particularly shows a power generation unit. The figure which shows the adjustment part in the stator for excitation. The figure which shows the mode of attachment or detachment of a housing. The figure which shows the structure of the electric power generating apparatus in another example.

Hereinafter, embodiments of the power generation device will be described.
As shown in FIG. 1, the power generation device 10 of the present embodiment is a submarine installation type power generation device, and includes a columnar column 11 as a main body with a bottom portion 11 a fixed to the seabed. The column 11 is made of a corrosion-resistant material, and various components related to power generation, which will be described later, are accommodated in the column 11. A cylindrical housing 12 called a nacelle or a pod is detachably attached to an attachment portion 11b located on the opposite side of the bottom 11a of the support column 11. The housing 12 is made of a resin material, and houses various components related to power generation described later.

  The power generation apparatus 10 includes a generator 100 that is a winding induction machine that forms the core of power generation, and a power generation unit 101 that is also a winding induction machine that is excited to generate power. Further, the power generation unit 101 is configured with a generator output in the generator 100, that is, a capacity (size) due to slippage. For this reason, the power generation unit 101 is configured to be at least smaller than the power generator 100 as long as the power generator 100 is a winding induction machine. For example, when the generator 100 has a function of generating power within 10% of the slip, the power generation unit 101 may have a capacity of about 1/10 (1/10) that of the generator 100. The power generation unit 101 is supplied with power necessary for excitation from a power cable 102 described later.

  The power (AC power) generated by such a power generation apparatus 10 is transmitted to a power transmission station 103 as a power feeding unit on the ground via a power cable (transmission line) 102 that leads from the inside of the support 11 to the ground through the seabed. Is done. The power transmission station 103 transmits the power transmitted from the power generation apparatus 10 to a predetermined supply destination. Note that the power transmission station 103 requests AC power having a desired frequency, and in this embodiment requests AC power of 60 Hz (Hertz). For this reason, the power generation device 10 of the present embodiment is configured to be able to generate 60 Hz AC power by power generation.

Hereinafter, the configuration of the power generation device 10 will be described in detail.
As shown in FIGS. 1 and 2, a mounting hole 12 a that opens toward the column 11 (downward in FIG. 1) is formed in a part of the outer periphery of the housing 12. When the housing 12 is attached to the support column 11, the attachment portion 11 b of the support column 11 is fitted into the installation hole 12 a. In addition, between the attachment part 11b and the attachment hole 12a is waterproofed by these fitting and a predetermined sealing member.

  The housing 12 is installed so that its front end 12b faces the ocean current, and its appearance is streamlined from the front end 12b to the rear end 12c so that the resistance of the ocean current is reduced. Inside the housing 12, a cylindrical rotating body 13 as a receiving portion is assembled so as to be rotatable relative to the housing 12.

  The rotating body 13 includes a cylindrical portion 13 a that is formed thinly from the front to the rear of the streamline type of the housing 12. The cylindrical portion 13a is made of ceramic or fiber composite material, and both ends of the outer periphery thereof are rotatably supported by bearings 13b fixed to the housing 12. A plurality of (three in the present embodiment) blade portions (blades) 13c are fixed to the inner periphery of the cylindrical portion 13a so as to be integrally rotatable with the cylindrical portion 13a so as to protrude inward.

  The blade portion 13 c is made of ceramic or a fiber composite material, and has a circumferential width that is thick from the front to the rear of the streamline type of the housing 12. The blade portion 13 c is formed so that one side in the circumferential direction is substantially parallel to the axial direction of the housing 12, and the other side is oblique to the axial direction of the housing 12.

  For this reason, the blade | wing part 13c will acquire the thrust in the circumferential direction of the housing 12, if the ocean current is received from the front end 12b of the housing 12. FIG. As a result, in the power generation device 10, by receiving the ocean current at the front end 12 b of the housing 12, the blade portion 13 c obtains a propulsive force and the rotating body 13 (cylindrical portion 13 a) rotates in the R direction (from the streamlined front to the rear). And clockwise).

  An annular storage portion 12d is formed between the inner periphery of the housing 12 and the outer periphery of the cylindrical portion 13a. The accommodating portion 12 d is formed along the axial direction of the housing 12 and communicates with the mounting hole 12 a at a portion facing the support column 11. The accommodating portion 12d is waterproofed by a predetermined seal member 13d provided on the outer side in the axial direction of the bearings 13b at both ends that support the cylindrical portion 13a of the rotating body 13.

  An annular power generation rotor 14 as a secondary rotor is fixed to the outer periphery of the cylindrical portion 13 a of the rotating body 13 so as to be able to rotate integrally with the rotating body 13. The power generating rotor 14 is set so that the outer diameter thereof is substantially the same as the outer diameter of the housing portion 12d. When rotating together with the rotating body 13, the outer surface of the housing portion 12d does not generate any sliding resistance. Set to diameter. The power generation rotor 14 is built in the housing portion 12 d, that is, the housing 12.

  Further, the power generation rotor 14 is fixed so as to be positioned between the bearings 13b at both ends supporting the cylindrical portion 13a (inward in the axial direction) and closer to the front end 12b of the housing 12. The power generation rotor 14 includes a rotor core portion 14a formed with a plurality of teeth protruding outward in the radial direction. The plurality of teeth are formed at equal intervals in the circumferential direction of the rotor core portion 14a. A secondary coil 14b for power generation is wound around each tooth of the rotor core portion 14a.

  As shown in FIG. 1, the power generation rotor 14 includes a power generation secondary coil 14 b wound around the rotor core portion 14 a, an end portion 14 c protruding from the rotor core portion 14 a in the axial direction of the housing 12, a so-called coil. An end is formed.

  An annular excitation rotor 15 as a winding type rotor is fixed to the outer periphery of the cylindrical portion 13 a of the rotating body 13 via a spacer 16 so as to be integrally rotatable with the rotating body 13. The excitation rotor 15 is set so that its outer diameter via the spacer 16 substantially coincides with the outer diameter of the accommodating portion 12d, and when it rotates with the rotating body 13, it slides between the outer periphery of the accommodating portion 12d. Is set to an outer diameter that does not substantially generate. The exciting rotor 15 is built in the housing portion 12 d, that is, the housing 12.

  Further, the excitation rotor 15 and the spacer 16 are located between the bearings 13b at both ends supporting the cylindrical portion 13a (inward in the axial direction) and closer to the rear end 12c of the housing 12 than the power generation rotor 14 is. Fixed. The exciting rotor 15 includes a rotor core portion 15a formed with a plurality of teeth protruding outward in the radial direction. The plurality of teeth are formed at equal intervals in the circumferential direction of the rotor core portion 15a. A secondary coil for excitation 15b is wound around each tooth of the rotor core portion 15a. Each phase of the excitation secondary coil 15b is connected to each phase of the power generation secondary coil 14b.

  As shown in FIG. 1, the excitation rotor 15 includes an end portion 15c protruding from the rotor core portion 15a in the axial direction of the housing 12 out of the excitation secondary coil 15b wound around the rotor core portion 15a, a so-called coil. An end is formed.

  Also, the brake portion 104 is a housing portion 12d between the bearings 13b at both ends that support the cylindrical portion 13a (inner side in the axial direction) and closer to the rear end 12c of the housing 12 than the excitation rotor 15. Provided. The brake unit 104 has a function of generating a braking force so as to stop the rotation of the rotating body 13 and temporarily fixing the rotating body 13 whose rotation is stopped to the housing 12.

  As shown in FIGS. 1 and 2, a mounting portion 11 b of the support column 11 is disposed at a position facing the power generation rotor 14 in the mounting hole 12 a of the housing 12. And the fan-shaped stator 17 for electric power generation as a primary side stator is arrange | positioned along the surface at the attaching part 11b. In addition, the surface of the power generation stator 17 that opposes the power generation rotor 14 is covered with a nonmagnetic and nonconductive member to be waterproofed. The power generation stator 17 is disposed with a slight gap (gap) between the power generation rotor 14 and the power generation rotor 14. The power generation stator 17 is embedded in the mounting portion 11 b, that is, the column 11.

  As shown in FIG. 2, the power generation stator 17 is formed in an angle range A that is equal to or less than half of the circumference of the power generation rotor 14. The power generation device 10 of the present embodiment is configured by a three-phase alternating current. For this reason, the said angle range A is a range which is settled in the support | pillar 11, Comprising: It has at least the range which can wind the coil corresponding to each phase by the same set. The angle range A of the present embodiment has a range in which two sets of coils corresponding to each of the U phase, the V phase, and the W phase can be wound.

  The power generation stator 17 includes a stator core portion 17a formed with a plurality of teeth protruding inward in the radial direction. The plurality of teeth are formed at equal intervals in the circumferential direction of the stator core portion 17a. In the present embodiment, as described above, six teeth are formed so that there are two sets of teeth corresponding to each phase. Two sets of coils corresponding to each phase are wound around each tooth of the stator core portion 17a as the primary coil for power generation 17b. The power generation primary coil 17 b corresponding to each phase is connected to the power cable 102.

  As shown in FIG. 1, the power generation stator 17 includes a power generation primary coil 17 b wound around the stator core portion 17 a, an end portion 17 c protruding from the stator core portion 17 a in the axial direction of the housing 12, a so-called coil. An end is formed.

  As shown in FIGS. 1 and 3, the mounting portion 11 b disposed at a position facing the exciting rotor 15 in the mounting hole 12 a of the housing 12 has a winding-type stator along the surface thereof. A fan-shaped excitation stator 18 is arranged. The excitation stator 18 is arranged with a slight gap (gap) between the excitation rotor 15 and the excitation rotor 15. The surface of the exciting stator 18 that opposes the exciting rotor 15 is covered with a non-magnetic and non-conductive member to be waterproof. The exciting stator 18 is embedded in the mounting portion 11 b, that is, the column 11.

  As shown in FIG. 3, the excitation stator 18 is formed in an angle range B that is less than half of the circumference of the excitation rotor 15. As described above, the power generation apparatus 10 of the present embodiment is configured with a three-phase alternating current. For this reason, the said angle range B is a range which is settled in the support | pillar 11, Comprising: It has at least the range which can wind the coil corresponding to each phase by the same set. The angle range B of the present embodiment has a range in which two sets of coils corresponding to each of the U phase, the V phase, and the W phase can be wound. Further, the angle range B has a margin in which the excitation stator 18 can rotate in the circumferential direction between the angle ranges C in the support column 11. The angle range C is set to a maximum range that is empirically derived that the power factor can be adjusted (for example, one tooth of a stator core portion 18a described later).

  The exciting stator 18 includes a stator core portion 18a formed with a plurality of teeth protruding inward in the radial direction. The plurality of teeth are formed at equal intervals in the circumferential direction of the stator core portion 18a. In the present embodiment, as with the power generation stator 17, six teeth are formed. Two sets of coils corresponding to each phase are wound around each tooth of the stator core portion 18a as the exciting primary coil 18b. The excitation primary coil 18 b corresponding to each phase is connected to the power cable 102 via the control unit 19.

  The control unit 19 draws power from the power cable 102 and controls the power supply to the excitation primary coil 18 b of each phase so that the excitation stator 18 generates a rotating magnetic field in the excitation rotor 15. That is, the control unit 19 generates a rotating magnetic field for the excitation rotor 15 using the electric power generated by the power generation device 10. The electric power passing through the control unit 19 draws electric power from the power transmission station 103 and generates a rotating magnetic field for the excitation rotor 15 when the rotation speed of the excitation rotor 15 is slow. The electric power passing through the control unit 19 is supplied to the power transmission station 103 side when the rotation speed of the excitation rotor 15 is high.

  As shown in FIG. 1, the exciting stator 18 includes an end portion 18c protruding from the stator core portion 18a in the axial direction of the housing 12 out of the exciting primary coil 18b wound around the stator core portion 18a, a so-called coil. An end is formed.

  The exciting stator 18 is mechanically connected to an adjusting unit 20 that generates power for rotating the exciting stator 18 in the column 11 along the circumferential direction. The adjustment unit 20 is accommodated in the column 11 on the bottom 11a side of the column 11 with respect to the excitation stator 18.

Here, the configuration of the adjustment unit 20 will be described in detail.
As shown in FIG. 4, the adjustment unit 20 includes an adjustment claw 21, a motor 22 serving as a drive source, and a worm gear 23. The adjustment claw 21 is fixed to the bottom portion 11a side of the support column 11 in the excitation stator 18 so as to be movable together. A screw groove 21 a is formed at the tip of the adjustment claw 21. As the motor 22, for example, a three-phase motor with a brush is employed. The worm gear 23 is connected to the motor 22 via the output shaft 22a, and is connected to the adjustment claw 21 through meshing of the tooth portion 23a and the screw groove 21a.

  The adjusting unit 20 transmits the rotation of the motor 22 to the worm gear 23 to apply the motor torque to the excitation stator 18 as power. The power applied by the motor 22 acts as power for rotating the excitation stator 18 in the X direction.

  The operation of the adjusting unit 20 is controlled by the control unit 19. In the middle of the power cable 102, a phase detection unit 24 that detects the phase of power flowing through the power cable 102, that is, the phase of current and voltage, is provided. The phase detection unit 24 outputs a signal corresponding to the power phase flowing through the power cable 102 to the control unit 19.

  Then, the control unit 19 drives and controls the motor 22 based on the signal from the phase detection unit 24. Specifically, the control unit 19 calculates a power factor from the phase of current and voltage, and calculates a motor control signal Sm using a map according to the calculation result to control the rotation angle of the motor 22. Then, the control unit 19 performs feedback control so that the power factor of the phase of the current and voltage becomes a predetermined power factor (“1” in the present embodiment).

  Thus, the worm gear 23 is rotated in the Y direction by the motor torque generated by the motor 22, and the adjustment pawl 21 that receives the rotation moves in the Z direction. As the adjustment claw 21 moves, the excitation stator 18 rotates in the X direction, so that the power factor of the electric power generated by the power generation apparatus 10 can be adjusted.

The power generation apparatus 10 configured as described above generates power as follows.
In the power generation apparatus 10, when the rotating body 13 rotates by receiving the ocean current, the power generation rotor 14 and the excitation rotor 15 rotate together with the rotating body 13. On the other hand, the exciting stator 18 causes the exciting rotor 15 to generate a rotating magnetic field based on the controller 19 constantly supplying 60 Hz power. As a result, a voltage having a frequency corresponding to the difference between the rotational speed of the exciting rotor 15 at that time and the speed of the rotating magnetic field generated by the exciting stator 18 is induced in the exciting rotor 15.

  Subsequently, the exciting rotor 15 generates a rotating magnetic field when current is induced by the exciting stator 18, and this rotating magnetic field is arranged side by side along the axial direction of the housing 12. An electric current is passed through the rotor 14. That is, the excitation rotor 15 (power generation unit 101) excites the power generation rotor 14 (generator 100). As a result, a voltage having a frequency corresponding to the speed of the rotating magnetic field generated by the power generation rotor 14 is induced in the power generation stator 17. As a result, the power generation apparatus 10 generates power based on the voltage induced in the power generation stator 17.

  In the present embodiment, the voltage of the frequency induced according to the difference between the rotation speed of the excitation rotor 15 and the speed of the rotating magnetic field generated by the excitation stator 18 is the power generation rotor 14 and the excitation rotor 15. It can be said that the electric power is regenerated by the power generation unit 101 based on the actual rotation.

  For example, the arrow S3 shown in FIG. 2 means the speed of the rotating magnetic field capable of generating the 60 Hz power required by the power transmission station 103, and the arrow S1 indicates the rotating magnetic field depending on the actual rotating speed of the power generation rotor 14 and the excitation rotor 15. Means speed. In this case, a voltage having a frequency corresponding to the difference between the arrow S3 and the arrow S1 is induced in the excitation rotor 15, and electric power corresponding to the arrow S0 is regenerated by the power generation unit 101. The current based on the electric power corresponding to the arrow S0 generates a rotating magnetic field in the power generating rotor 14 through the exciting rotor 15, so that the rotating magnetic field for the arrow S2 is superimposed on the rotating magnetic field at the speed indicated by the arrow S1. As a result, the power generation rotor 14 adds the speed of the arrow S1 due to the actual rotation of the power generation rotor 14 and the speed of the arrow S2 due to the rotating magnetic field generated by the excitation rotor 15 (power generation unit 101). , That is, a rotating magnetic field having a speed capable of generating electric power of 60 Hz.

According to the electric power generating apparatus 10 demonstrated above, there exists an effect | action and effect shown to the following (1)-(6).
(1) According to the present embodiment, the generator 100 is provided with the generator rotor 14 on the housing 12 side and the generator stator 17 on the column 11 side. The electric power generated by the power generation device 10 is transmitted from the power generation stator 17 provided on the support 11 to the power transmission station 103 through the power cable 102. That is, when it comes to power generation, wired power transmission that passes through the housing 12 and the column 11 is not used to transmit the generated power to the power transmission station 103, so the housing 12 and the column are removed when the housing 12 is removed from the column 11. It is not necessary to consider the wiring between 11. Naturally, since the wireless power transmission is not used to transmit the generated power to the outside, the loss of the generated power is also suppressed.

  Further, in the power generation apparatus 10 of the present embodiment, the power generation rotor 101 can be excited by generating a rotating magnetic field by separately providing the power generation unit 101 having the excitation rotor 15 and the excitation stator 18. According to the present embodiment, with respect to the power generation unit 101, the excitation rotor 15 can be provided on the housing 12 side and the excitation stator 18 can be provided on the support 11 side, and the housing 12 is removed when the housing 12 is removed from the support 11. And the wiring between the support columns 11 need not be considered.

  That is, as shown in FIG. 5, for example, when the housing 12 is maintained or a component in the housing 12 is broken, an operation of removing the housing 12 from the column 11 is performed. For such removal, first, the rotating body 13 is fixed to the housing 12 by the brake unit 104 to ensure the safety of the work, thereby making the relative rotation of the rotating body 13 with respect to the housing 12 impossible. Then, by pulling the housing 12 away from the support column 11, the mounting portion 11 b of the support column 11 is extracted from the mounting hole 12 a of the housing 12 and the housing 12 is removed from the support column 11. Therefore, in the power generation apparatus 10 using the winding induction machine, the housing 12 can be easily detached from the support column 11.

  On the other hand, after the maintenance of the housing 12 is completed or when the repair of the housing 12 is completed, an operation of attaching the housing 12 to the column 11 is performed. In such attachment, as in the case of removal, the rotating body 13 is fixed to the housing 12 by the brake portion 104 to ensure work safety. Then, by fitting the housing 12 into the column 11, the mounting portion 11 b of the column 11 is fitted into the mounting hole 12 a of the housing 12, and the housing 12 is attached to the column 11. Therefore, the housing 12 can be easily attached to the column 11 in the power generation apparatus 10 using the winding induction machine.

  (2) Further, the power generation unit 101 of the present embodiment has a configuration equivalent to a so-called transformer connection type circuit in which the excitation rotor 15 is provided on the housing 12 side and the excitation stator 18 is provided on the support column 11 side. ing. For this reason, in this embodiment, in order to excite the excitation rotor 15 (electric power generation part 101), configurations, such as an inverter, a converter, and a slip ring, become unnecessary. Therefore, it contributes to the reduction of the components of the power generation device 10 and is advantageous from the viewpoint of maintenance of the power generation device 10.

  (3) Like the power generation apparatus 10 of the present embodiment, the rotation of the rotating body 13 that depends on the ocean current is less constant than that of wind power or the like, but is not constant and changes every moment. On the other hand, the frequency supplied to the exciting stator 18 via the power cable 102 is kept constant.

  Therefore, as shown in FIG. 2, if the arrow S1 increases or decreases, the arrow S0, that is, the arrow S2 increases or decreases according to the increase or decrease of the arrow S1. Then, the rotating magnetic field generated with respect to the exciting rotor 15 by the exciting stator 18 is kept constant. As a result, fluctuations in the speed of the rotating magnetic field generated by the power generation rotor 14 with respect to the power generation stator 17 are suppressed, and fluctuations in the frequency of the voltage induced in the power generation stator 17 are suppressed. Therefore, a separate configuration or process for adjusting the frequency of the generated power, for example, a process related to an inverter or a converter can be omitted.

  (4) By the way, as for the power transmitted to the power cable 102 through the power generation stator 17, the power factor may be lowered due to the phase of the current and the voltage being shifted. Therefore, the power transmission efficiency can be improved by providing the adjustment unit 20 so that the power factor of the power transmitted to the power cable 102 through the power generation stator 17 can be adjusted.

  (5) The adjustment unit 20 of the present embodiment is configured to shift the excitation stator 18 in the column 11 in the circumferential direction. Thereby, the structure of the adjustment part 20 can be completed within the support | pillar 11, and the efficiency of power transmission can be improved, without interfering with the effect that the housing 12 is easily removed from the support | pillar 11.

  (6) In particular, the power generation unit 101 including the excitation stator 18 has a smaller configuration than the generator 100. That is, since the adjustment unit 20 has only to shift the elements of the power generation unit 101 having a relatively small configuration, an increase in the size of the configuration according to this can be suppressed.

In addition, the said embodiment can also be implemented with the following forms which changed this suitably.
The adjustment unit 20 only needs to be able to shift either the power generation stator 17 or the excitation stator 18. For example, the power generation stator 17 may be shifted. If the generator 100 is configured to be smaller than the power generation unit 101 according to the specifications of the power generation device 10 and the conditions of the power to be generated, the adjustment unit 20 targets the power generation stator 17 that constitutes the generator 100. More effective by shifting.

  In the above embodiment, the adjustment unit 20 is realized with a mechanical configuration. However, the adjustment unit 20 is realized with an electrical configuration in which a variable capacitor is used to change the phase of current and voltage to adjust the power factor. You can also.

In the power generation apparatus used in a situation where the power factor may be ignored, the adjustment unit 20 can be omitted.
As a method for supplying power to the excitation stator 18, power may be supplied from a power transmission station or a power source provided separately from the power transmission station 103.

  -The support | pillar 11 may be comprised so that the half or more of the circumferential direction of the housing 12 may be enclosed. In this case, the number of teeth formed in the power generation stator 17 and the excitation stator 18 can be increased within the range surrounding the housing 12, and the volumetric efficiency of power generation can be improved. In the case where the support column 11 is configured so as to surround the housing 12, the support column 12 may be configured to be slid in the axial direction when the housing 12 is detached from the support column 11.

  -Although the above-mentioned embodiment generated electricity using a sea current, it is applicable to what generates electricity using a fluid like a tidal current or a wind power. Even in this case, there is an effect that the housing can be easily detached from the support column as in the above embodiment.

  As shown in FIG. 6, the power generation stator 17 may be formed in a comb shape in which a plurality of teeth are extended in parallel from the linear stator core portion 17 a toward the power generation rotor 14. Even in this case, there is an effect that the housing can be easily detached from the support column as in the above embodiment. In addition, in this another example, regarding the space for winding the primary coil for power generation 17b, the winding width of the coil can be made thinner as the outer teeth, and the width of the column 11 can be reduced. .

Next, a technical idea that can be grasped from the above-described embodiment and another example (modification) will be additionally described below.
(A) The power generation unit has a configuration smaller than that of the generator, and the adjustment unit has a configuration in which the wound stator in the main body is shifted in the circumferential direction. According to this configuration, it is only necessary to shift the elements of the power generation unit having a relatively small configuration with respect to the adjustment unit, and thus it is possible to suppress an increase in the size of the configuration related to this.

  DESCRIPTION OF SYMBOLS 10 ... Electric power generating apparatus, 11 ... Support | pillar (body part), 12 ... Housing, 13 ... Rotating body (receiving part), 14 ... Rotor for electric power generation (secondary side rotor), 15 ... Stator for electric power generation (primary side rotation) ), 17 ... Excitation rotor (winding rotor), 18 ... Excitation stator (winding stator), 20 ... Adjustment unit, 100 ... Generator, 101 ... Power generation unit, 102 ... Power cable (transmission line) .

Claims (4)

A winding having a receiving portion that rotates by receiving a fluid flow, a housing to which the receiving portion is mounted, a main body portion to which the housing is attached and detached, a primary side stator, and a secondary side rotor. A generator using a linear induction machine, wherein the generated power is transmitted to the outside through a transmission line connected to the primary stator,
A power generation unit provided separately from the generator,
The power generation unit includes a winding rotor, and a winding stator that generates a rotating magnetic field for the winding rotor based on power feeding from a predetermined power feeding unit,
In the housing, the secondary rotor and the winding rotor are arranged side by side in the axial direction of the receiving portion, and the respective rotors are incorporated so as to rotate together with the rotation of the receiving portion. And
The power generator according to claim 1, wherein the primary side stator and the winding type stator are arranged side by side facing the corresponding rotor in the main body portion.   The power generator according to claim 1, wherein the wound stator is connected to the power transmission line.   The power generation device according to claim 1, further comprising an adjustment unit that adjusts a power factor of electric power transmitted to the transmission line through the primary side stator.   4. The power generation device according to claim 3, wherein the adjustment unit has a configuration in which one of the primary side stator and the winding type stator in the main body portion is shifted in a circumferential direction.