WO2014083687A1

WO2014083687A1 - Rotating electrical machine system and wind power generation system

Info

Publication number: WO2014083687A1
Application number: PCT/JP2012/081104
Authority: WO
Inventors: 大地川村; 順弘楠野; 守木村; 雅寛堀; 佐藤　大祐
Original assignee: 株式会社日立製作所
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2014-06-05
Also published as: JP5852750B2; JPWO2014083687A1

Abstract

The present invention provides a rotating electrical machine system having an operation range not narrowed, and capable of sufficiently cooling a power convertor without resulting in performance degradation. The rotating electrical machine system according to the present invention comprises: a first rotating electrical machine constituted by a first stator having a first stator winding and stator core, and a first rotor having a first rotor winding and rotor core and disposed near the inner diameter of the first stator with a prescribed gap therebetween; a second rotating electrical machine constituted by a second stator having a second stator winding and stator core, and a second rotor having a second rotor winding and rotor core and disposed near the inner diameter of the second stator with a prescribed gap therebetween; and a power convertor electrically connected to the first and second rotating electrical machines, and disposed either at the first rotor core or at the second rotor core to rotate when the first and second rotor cores rotate.

Description

Rotating electrical machine system and wind power generation system

The present invention relates to a rotating electrical machine system and a wind power generation system, and in particular, is installed in a first rotating electrical machine (main generator) and a second rotating electrical machine (auxiliary generator), and rotates together with a rotor. The present invention relates to a rotating electrical machine system and a wind power generation system suitable for a device including a power converter.

In recent years, power generation systems using natural energy such as wind power generation or solar power generation have been attracting attention in order to prevent global warming. Among these, in a wind power generation system using wind power, there are many examples in which an AC excitation type rotating electrical machine is used as a power generation device.

When an AC excitation type rotating electrical machine is used as a power generation device of a wind power generation system, it is necessary to supply excitation power to a rotor winding in a rotating rotor during operation. Usually, in order to supply electric power to the rotor winding, a slip ring and a brush are provided, and the brush is brought into contact with the rotating slip ring to energize it.

However, the energy required for power generation operation in a wind power generation system is large, and if a slip ring and a brush are provided for exciting power supply when performing a power generation operation, the wear of the brush advances, so that periodic maintenance is required. Necessary.

However, in the wind power generation system, the AC excitation type rotating electrical machine is installed in a nacelle on the tower of the windmill, and it is necessary to perform regular maintenance in a limited space in the nacelle. Maintenance reduction such as was demanded.

As a brushless AC excitation synchronous rotating electrical machine, for example, there is one described in Patent Document 1. In Patent Document 1, a rotary exciter and a power converter are provided coaxially with an AC excitation synchronous generator to rectify the electric power of the power system to DC, and energize the stator of the rotary exciter. After the power is supplied to the rotor, the power converted by the power converter is supplied to the rotor of the AC excitation synchronous generator to perform the power generation operation. According to the configuration of Patent Document 1, since the power converter is attached to the rotor, the power converter rotates as the rotor rotates.

JP 2002-136191 A

In a conventional general AC excitation synchronous generator, when the synchronous speed is lower than the synchronous speed, the power of the power system is supplied to the rotor through the power converter, and when the synchronous speed is higher than the synchronous speed, the rotor power is supplied to the rotor through the power converter. Supplying to the power system.

However, in Patent Document 1, power can be supplied from the power system to the AC excitation synchronous generator, but the voltage of the power system is rectified by the rectifier and then supplied to the rotary exciter, so that the rectifier is installed. Therefore, electric power cannot be supplied from the AC excitation synchronous generator to the power system. Therefore, the operation range becomes narrower than that of a conventional general AC excitation synchronous generator. That is, both power supply from the power system to the generator and power supply from the generator to the power system cannot be performed.

In addition, when trying to realize a brushless AC excitation synchronous rotating electrical machine, if the power converter is arranged on the rotor, it is necessary to simultaneously cool the heat generated by the loss of the rotating electrical machine and the power converter. With regard to the cooling capacity, there is a problem that the generator and the power converter that generates a large amount of heat cannot be sufficiently cooled simultaneously, and the performance of the power converter deteriorates.

The present invention has been made in view of the above-described points, and an object of the present invention is to provide a rotating electrical machine system in which the operating range is not narrowed, and the power converter can be sufficiently cooled and performance is not deteriorated. It is to provide a wind power generation system.

In order to achieve the above object, a rotating electrical machine system of the present invention has a first stator having a first stator winding and a stator core, a first rotor winding and a rotor core, A first rotating electric machine comprising a first rotor disposed on an inner diameter side of the first stator with a predetermined gap, a second stator winding and a second core having a stator core; A second rotating electrical machine comprising a second rotor having a stator, a second rotor winding, and a rotor iron core, and disposed on the inner diameter side of the second stator via a predetermined gap; A power converter that is electrically connected to the first and second rotating electrical machines and that is installed on one of the first and second rotor cores so as to rotate during rotation. Or
Alternatively, the first stator having the first stator winding and the stator core, the first rotor winding and the rotor core, and a predetermined gap on the inner diameter side of the first stator. A first rotating electric machine composed of a first rotor, a second stator winding and a second stator having a stator core, a second rotor winding and a rotor core And a second rotating electrical machine comprising a second rotor disposed on the inner diameter side of the second stator via a predetermined gap, and electrically with the first and second rotating electrical machines A power converter connected to and installed in any one of the first and second rotors so as to rotate during these rotations, the first and second rotor cores, Each of the first and second shafts is connected to the rotary shaft via a first arm extending in the radial direction. One end of the first arm to which the trochanter core is connected is connected to one end, extends from the connecting portion in the axial direction, is bent in the middle, and the other end is connected to the rotating shaft. The power converter is installed on the inner diameter side of the portion extending in the axial direction of the second arm, or the first or second rotor core Is connected to the rotating shaft through a first arm extending in the radial direction, and one end is connected to the middle of the first arm, and extends in the axial direction from the connecting portion, and the first or The second rotor iron core is supported, has a second arm that is bent in the middle of extending from the support portion and is connected to the rotating shaft at the other end, and extends in the axial direction of the second arm. The power converter is installed on the inner diameter side of the portion. .

In addition, a radially extending protrusion is formed on the outer diameter side of the portion extending in the axial direction of the second arm, and the protrusion is adjacent to one of the first and second rotor windings. The protrusion is a heat radiating fin, and the heat radiating fin has a shape obtained by warping a thin plate.

The power converter includes a power forward converter that converts alternating current to direct current and a power reverse converter that converts direct current to alternating current, and the power forward converter and the power reverse converter are alternately arranged in the circumferential direction. It is characterized by being installed in.

Also, the forward power converter and the reverse power converter are alternately arranged in the axial direction.

Further, a plurality of the power forward converter and the power reverse converter are installed in the radial direction.

Further, the power forward converter and the power reverse converter are installed at equal intervals.

Further, a door for parts replacement is formed on a side surface of the rotating electrical machine frame that houses the first and second rotating electrical machines and the power converter.

Furthermore, the wind power generation system of the present invention includes a rotor that rotates by receiving wind to achieve the above object, the rotating electrical machine system according to any one of the above that is connected to the rotor via a main shaft, and the rotation A nacelle that houses the electric system and a tower that supports the nacelle, and the first and second rotating electric machines are rotated by the rotational force of the rotor, and the first and second rotating electric machines The stator winding is connected to the power system side.

According to the present invention, there is an effect that the operating range is not narrowed, and the power converter can be sufficiently cooled and performance is not deteriorated.

It is a schematic sectional drawing which shows Example 1 of the rotary electric machine system of this invention. It is radial direction sectional drawing of FIG. It is a schematic sectional drawing which shows Example 2 of the rotary electric machine system of this invention. It is radial direction sectional drawing of FIG. It is a schematic sectional drawing which shows Example 3 of the rotary electric machine system of this invention. It is radial direction sectional drawing which shows Example 4 of the rotary electric machine system of this invention. It is a schematic sectional drawing which shows Example 5 of the rotary electric machine system of this invention. It is a schematic sectional drawing which shows Example 6 of the rotary electric machine system of this invention. It is a schematic block diagram which shows the wind power generation system which is Example 7 of this invention.

Hereinafter, the rotating electrical machine system and the wind power generation system of the present invention will be described based on the illustrated embodiments. In addition, in each Example, the same code | symbol is used for the same component.

1 and 2 show Embodiment 1 of the rotating electrical machine system of the present invention.

As shown in the figure, a rotating electrical machine system 100 of the present embodiment includes a main generator 1 that is a first rotating electrical machine that functions as a generator for sending generated power to an electric power system, an exciter and a generator depending on operating conditions. Auxiliary generator 2, which is a second rotating electrical machine that performs the two functions, and main generator 1 and auxiliary generator 2 are electrically connected to convert an AC signal into a DC signal or convert a DC signal into an AC signal. The power converter 3 is provided.

The main generator 1 includes a main generator stator core 4 and a three-phase main generator stator winding 6 wound in a slot (not shown) provided in the main generator stator core 4. A main generator stator core 1, a main generator rotor core 5 disposed with a predetermined gap on the inner diameter side of the main generator stator core 4, and the main generator rotor core 5. And a main generator rotor 1B composed of a three-phase main generator rotor winding 7 wound in a slot (not shown).

Similarly, the auxiliary generator 2 has a three-phase auxiliary generator wound around an auxiliary generator stator core 8 and a slot (not shown) provided in the auxiliary generator stator core 8. Auxiliary generator stator 2A composed of stator winding 10, auxiliary generator rotor core 9 arranged with a predetermined gap on the inner diameter side of auxiliary generator stator core 8, and this auxiliary generator rotor core 9 includes an auxiliary generator rotor 2 </ b> B including a three-phase auxiliary generator rotor winding 11 wound in a slot (not shown) provided in 9.

FIG. 1 shows a state in which a rotating electrical machine system 100 according to the present embodiment is mounted on a wind power generation system. The rotor 12 rotates by receiving wind, and is connected to the rotor 12 and is also connected to the main generator rotor. A shaft 13 serving as a rotation axis of the iron core 5 and the auxiliary generator rotor core 9 and a speed increaser 17 are illustrated, and the power converter 3 is an example mounted on the main generator rotor core 5. (The power converter 3 may be mounted on the auxiliary generator rotor core 9).

In this embodiment, the power converter 3 includes a power forward converter 3a that converts an alternating current signal into a direct current signal and a power reverse converter 3b that converts the direct current signal into an alternating current signal. As shown in FIG. 2, the power generator 3a and the power reverse converter 3b are alternately arranged in the rotation axis circumferential direction at equal intervals on the main generator rotor core 5 (the power forward converter 3a and the power reverse converter 3b). The converters 3b may be arranged on the auxiliary generator rotor core 9 alternately in the circumferential direction of the rotation axis and at equal intervals).

Usually, in the power forward converter 3a and the power reverse converter 3b, the amount of current to be conducted and the number of times of switching are different, so that the amount of generated heat differs.

However, as in the present embodiment, the power conversion is performed by arranging the power forward converter 3a and the power reverse converter 3b alternately in the circumferential direction of the rotation axis on the main generator rotor core 5 at equal intervals. Since the heat generated from the generator 3 is uniformly dispersed in the rotating electrical machine via the rotor core and the refrigerant, local heat stagnation in the apparatus due to the mounting arrangement of the power converter 3 is reduced. Thus, performance degradation due to heat of the power converter 3 can be suppressed.

Further, when the power converters 3 having large calorific values are mounted close to each other, the local heat generation becomes large, so the temperature around the power converter 3 becomes high, and the performance of the power converter 3 due to heat. Although there is a concern that deterioration will increase, as in the present embodiment, the power forward converter 3a and the power reverse converter 3b are alternately arranged on the main generator rotor core 5 in the circumferential direction of the rotation axis, and the like. By disposing at intervals, the performance deterioration of the power converter 3 can be suppressed.

By adopting such a configuration of the present embodiment, both the power supply from the power system to the generator and the power supply from the generator to the power system are possible. In addition, since the power forward converter and the power reverse converter are alternately arranged at equal intervals in the circumferential direction of the rotation axis, the heat generated from the power converter is uniformly distributed in the rotating electrical machine. Therefore, it is possible to obtain an effect that the power converter can be sufficiently cooled and performance is not deteriorated.

3 and 4 show a second embodiment of the rotating electrical machine system of the present invention.

The rotating electrical machine system 200 of the present embodiment shown in the figure is different from the first embodiment in the installation position of the power converter 3, and the other configuration is substantially the same as the first embodiment.

That is, in this embodiment, the second rotor is provided via the main generator arm (I) 14a, which is the first arm, in which the main generator rotor core 5, which is the first rotor core, extends in the radial direction. The auxiliary generator rotor core 9, which is an iron core, is connected to the shaft 13 via an auxiliary generator arm 16, which is a first arm extending in the radial direction, and one end is connected to the middle of the main generator arm 14 a. A main generator arm (II) 14b, which is a second arm extending in the axial direction from the connecting portion and bent at a right angle from the middle and connected to the shaft 13 at the other end. The power converter 3 is installed on the inner diameter side of the portion extending in the axial direction of the machine arm (II) 14b.

Further, on the outer diameter side of the portion extending in the axial direction of the main generator arm (II) 14b, a radiating fin 15 of a protruding structure extending in the radial direction is formed. The main generator rotor winding 7 is formed at a position adjacent to the main generator rotor winding 7. Further, the heat radiating fin 15 has a shape in which a thin plate is distorted, and has a function of sending wind to the adjacent main generator rotor winding 7.

Also in the present embodiment, the power converter 3 includes a power forward converter 3a that converts an AC signal into a DC signal and a power reverse converter 3b that converts a DC signal into an AC signal. These power forward converters 3a As shown in FIG. 4, the power inverter 3b is alternately arranged at equal intervals in the circumferential direction on the inner diameter side of the portion extending in the axial direction of the main generator arm (II) 14b. The radiating fins 15 are inclined and extended in the radial direction on the outer diameter side of the portion extending in the axial direction of the main generator arm (II) 14b.

In the present embodiment, the power converter 3 and the radiation fin 15 are installed on the main generator arm (II) 14b of the main generator 1, but are installed on the auxiliary generator arm 16 of the auxiliary generator 2. May be. In this case, the auxiliary generator arm 16 has the same structure as the main generator arm (I) 14a and the main generator arm (II) 14b described above, and the inner diameter of the auxiliary generator arm 16 that extends in the axial direction. The power converter 3 is installed on the side, and the radiation fins 15 are installed on the outer diameter side.

As in this example, the power converters 3 are alternately arranged in the circumferential direction of the rotation axis at equal intervals on the inner diameter side of the portion extending in the axial direction of the main generator arm (II) 14b, By installing the radiation fins 15 on the outer diameter side, heat generated from the power converter 3 is dissipated through the main generator arm (II) 14 b and the radiation fins 15. At this time, since the radiating fin 15 rotates together with the main generator arm (II) 14b, it is possible to efficiently radiate heat and by sending wind from the rotating radiating fin 15 to the main generator rotor winding 7. In addition, it is possible to prevent heat interference from the main generator rotor winding 7 to the power converter 3 and to further reduce performance deterioration due to heat of the power converter 3.

FIG. 5 shows a third embodiment of the rotating electrical machine system of the present invention.

The rotating electrical machine system 300 of the present embodiment shown in the figure is an improvement of the second embodiment. That is, in this embodiment, the power converter 3a and the power reverse converter 3b installed on the inner diameter side of the portion extending in the axial direction of the main generator arm (II) 14b are alternately arranged in the axial direction, and Are arranged at equal intervals. Of course, as in the second embodiment, the power forward converter 3a and the power reverse converter 3b are alternately arranged in the circumferential direction of the rotating shaft on the inner diameter side of the portion extending in the axial direction of the main generator arm (II) 14b. And it arrange | positions at equal intervals. Other configurations are the same as those of the second embodiment.

As in this embodiment, the power forward converters 3a and the power reverse converters 3b are alternately arranged at equal intervals in the axial direction, and alternately at equal intervals in the circumferential direction of the rotation axis. By arranging, the heat generated from the power converter 3 is uniformly distributed in the rotating electrical machine via the rotor core and the refrigerant, and the local heat generated in the apparatus due to the mounting arrangement of the power converter 3 is distributed. By reducing the stagnation, performance deterioration due to heat of the power converter 3 can be suppressed.

FIG. 6 shows a fourth embodiment of the rotating electrical machine system of the present invention.

The rotating electrical machine system 400 of the present embodiment shown in the figure is an improvement of the second embodiment. That is, in this embodiment, the power forward converter 3a and the power reverse converter 3b are alternately arranged in the circumferential direction of the rotating shaft on the inner diameter side of the portion extending in the axial direction of the main generator arm (II) 14b, and so on. A configuration in which a plurality of layers (two layers in this embodiment) are arranged in the radial direction is a configuration in which the heat dissipating fins 15 are respectively arranged on the outer diameter side at intervals. Other configurations are the same as those of the second embodiment.

According to the configuration of the present embodiment, the same effect as that of the second embodiment can be obtained, and the power converter 3 including the power forward converter 3a and the power reverse converter 3b is mounted at a high density in the radial direction. Therefore, the apparatus can be reduced in size.

Further, according to the present embodiment, the outer layer in the radial direction has a larger area of the housing surface (the portion extending in the axial direction of the main generator arm (II) 14b) on which the power converter 3 is mounted, and the radiation fins 15 can be formed more, it is preferable to mount the power converter 3 having a larger calorific value on the radially outer layer.

FIG. 7 shows a fifth embodiment of the rotating electrical machine system of the present invention.

The rotating electrical machine system 500 of the present embodiment shown in the figure is an improvement of the second embodiment. That is, in this embodiment, the main generator arm (II) 14b and the auxiliary generator arm 16 in the second embodiment shown in FIG. 3 are integrated.

That is, in this embodiment, the auxiliary generator rotor core 9 is connected to the shaft 13 via the first arm 20a extending in the radial direction, and one end is connected to the middle of the first arm 20a. It has a second arm 20b that extends in the axial direction from the connecting portion, supports the main generator rotor core 5 in the middle, is bent from the middle extending from the supporting portion, and is connected to the shaft 13 at the other end. The power converter 3 is installed on the inner diameter side of the portion extending in the axial direction of the second arm 20b, and the heat radiation fin 15 is installed on the outer diameter side. Other configurations are the same as those of the second embodiment.

According to the configuration of the present embodiment, the same effects as those of the second embodiment can be obtained, and the first arm 20a and the second arm 20b, that is, the main generator arm and the auxiliary generator arm are integrated. As a result, the number of parts can be reduced and the assembly of the apparatus can be simplified.

FIG. 8 shows a sixth embodiment of the rotating electrical machine system of the present invention.

The rotating electrical machine system 600 of the present embodiment shown in the drawing is an improvement of the fifth embodiment. That is, in the present embodiment, a part replacement window 21 is formed on the axial side wall of the rotating electrical machine frame 18 that houses the main generator, the auxiliary generator, and the power converter 3. Other configurations are the same as those of the fifth embodiment.

With the configuration of this embodiment, it is possible to obtain the same effect as that of the fifth embodiment. Of course, when the power converter 3 fails, the parts can be easily opened by opening the parts replacement window 21. It can be exchanged.

FIG. 9 shows a seventh embodiment in which the rotating electrical machine system of the present invention is applied to a wind power generation system.

As shown in the figure, the wind power generation system of the present embodiment includes a rotor 12 that rotates by receiving wind, and a rotating electrical machine system 23 of the present invention that is connected to the rotor 12 via a shaft 13 and a speed increaser 17. The rotary electric machine system 23 includes a nacelle (not shown) that houses the tower and a tower (not shown) that supports the nacelle. The main generator 1 and the auxiliary generator 2 are provided with the rotational force of the rotor 12. The main generator stator winding 6 and the auxiliary generator stator winding 10 are connected to the power system 22 side.

Thus, the wind energy received by the rotor 12 can be converted into electric energy by the rotating electrical machine system 23 and transmitted to the power system 22.

According to the present embodiment, since the rotating electrical machine system described above is employed, it is possible to prevent the apparatus from being enlarged and contribute to the downsizing of the nacelle.

Note that the circuit breaker 24 may be provided in parallel with the power converter 3. Thereby, the power converter 3 can be protected from the excessive electric power applied at the time of a system failure. Further, the present invention may be applied to a gearless system in which the speed increaser 17 is lost.

In addition, this invention is not limited to the above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 ... Main generator, 1A ... Main generator stator, 1B ... Main generator rotor, 2 ... Auxiliary generator, 2A ... Auxiliary generator stator, 2B ... Auxiliary generator rotor, 3 ... Power converter, 3a ... Power forward converter, 3b ... Power reverse converter, 4 ... Main generator stator core, 5 ... Main generator rotor core, 6 ... Main generator stator winding, 7 ... Main generator rotor winding Wires 8 ... Auxiliary generator stator core 9 ... Auxiliary generator rotor core 10 ... Auxiliary generator stator winding 11 ... Auxiliary generator rotor winding 12 ... Rotor 13 ... Shaft 14a ... Main generator arm (I), 14b ... Main generator arm (II), 15 ... radiating fins, 16 ... auxiliary generator arm, 17 ... speed increaser, 18 ... rotating electric machine frame, 20a ... first arm, 20b ... 2nd arm, 21 ... Window for parts replacement, 22 ... Power system, 23, 100, 200, 300 400, 500, 600 ... rotary electric machine system, 24 ... breaker.

Claims

A first stator having a first stator winding and a stator core, a first rotor winding and a rotor core, and a predetermined gap on the inner diameter side of the first stator A first rotating electric machine comprising a first rotor arranged; a second stator having a second stator winding and a stator core; a second rotor winding and a rotor core. And a second rotating electric machine comprising a second rotor disposed on the inner diameter side of the second stator via a predetermined gap, and electrically connected to the first and second rotating electric machines. A rotating electrical machine system comprising: a power converter installed in one of the first and second rotor cores so as to rotate during rotation.
A first stator having a first stator winding and a stator core, a first rotor winding and a rotor core, and a predetermined gap on the inner diameter side of the first stator A first rotating electric machine comprising a first rotor arranged; a second stator having a second stator winding and a stator core; a second rotor winding and a rotor core. And a second rotating electric machine comprising a second rotor disposed on the inner diameter side of the second stator via a predetermined gap, and electrically connected to the first and second rotating electric machines. And any one of the first and second rotors, and a power converter installed to rotate during these rotations,
The first and second rotor cores are connected to a rotating shaft via first arms extending in the radial direction, respectively, and the first and second rotor cores are connected to the first rotor core. One end of the arm is connected to one end of the arm, the second arm is extended in the axial direction from the connecting portion, bent from the middle, and the other end is connected to the rotating shaft, and the second arm The rotating electrical machine system is characterized in that the power converter is installed on the inner diameter side of the portion extending in the axial direction.
A first stator having a first stator winding and a stator core, a first rotor winding and a rotor core, and a predetermined gap on the inner diameter side of the first stator A first rotating electric machine comprising a first rotor arranged; a second stator having a second stator winding and a stator core; a second rotor winding and a rotor core. And a second rotating electric machine comprising a second rotor disposed on the inner diameter side of the second stator via a predetermined gap, and electrically connected to the first and second rotating electric machines. And any one of the first and second rotors, and a power converter installed to rotate during these rotations,
The first or second rotor core is connected to the rotary shaft via a first arm extending in the radial direction, and one end is connected to the middle of the first arm, and axially extends from the connecting portion. A second arm that supports the first or second rotor core in the middle and is bent from the middle and extended at the other end and connected to the rotary shaft. The rotating electrical machine system, wherein the power converter is installed on an inner diameter side of a portion extending in the axial direction of the second arm.
In the rotating electrical machine system according to claim 2 or 3,
A rotating electrical machine system, wherein a protrusion extending in the radial direction is formed on an outer diameter side of a portion extending in the axial direction of the second arm.
In the rotating electrical machine system according to claim 4,
The rotating electrical machine system, wherein the protrusion is formed adjacent to one of the first and second rotor windings.
In the rotating electrical machine system according to claim 4 or 5,
The rotating electrical machine system, wherein the protrusion is a heat radiating fin.
The rotating electrical machine according to claim 6,
The radiating fin has a shape obtained by warping a thin plate.
The rotating electrical machine system according to any one of claims 1 to 7,
The power converter includes a power forward converter that converts alternating current to direct current and a power reverse converter that converts direct current to alternating current. The power forward converter and the power reverse converter are alternately installed in the circumferential direction. Rotating electrical machine system characterized by that.
In the rotating electrical machine system according to claim 8,
The rotating electrical machine system, wherein the power forward converter and the power reverse converter are alternately installed in the axial direction.
In the rotating electrical machine system according to claim 8 or 9,
A rotating electrical machine system, wherein a plurality of the forward power converter and the reverse power converter are installed in a radial direction.
The rotating electrical machine system according to any one of claims 8 to 10,
The rotating electrical machine system, wherein the power forward converter and the power reverse converter are installed at equal intervals.
The rotating electrical machine system according to any one of claims 1 to 11,
A rotating electrical machine system, wherein a door for component replacement is formed on a side surface of a rotating electrical machine frame that houses the first and second rotating electrical machines and the power converter.
A rotor that rotates by receiving wind, a rotating electrical machine system according to any one of claims 1 to 12 connected to the rotor via a main shaft, a nacelle that houses the rotating electrical machine system, and And a tower that supports the nacelle,
The first and second rotating electric machines are rotated by the rotational force of the rotor, and the stator windings of the first and second rotating electric machines are connected to the power system side. Wind power generation system.