TWI726895B - Rotation speed control method of windmill and wind power generation device - Google Patents

Abstract

A method for controlling the rotation speed of a windmill is provided, which accelerates the rotation speed of the rotor to a certain speed at a low wind speed, thereby greatly improving the power generation efficiency.

Perform the following repetitive control: when the wind speed detection element detects a specific average wind speed that can output the generated power from the generator, the motor is automatically started, and it accelerates and rotates until the peripheral speed or rotation speed of the rotor reaches a specific speed. The motor stops. When the wind speed detection element detects a specific average wind speed again, the motor is automatically started again, and the motor is accelerated to rotate until the peripheral speed or rotation speed of the rotor reaches a specific speed, and the motor is stopped.

Description

Rotation speed control method of windmill and wind power generation device Invention field

The present invention relates to a method for controlling the rotation speed of a windmill and a wind power generation device that can improve the power generation efficiency even at low wind speeds, and can prevent the rotor from exceeding the rated number of rotations during strong winds, and generate power efficiently.

Background of the invention

Generally speaking, wind power generation devices have large mechanical losses, and at low wind speeds, the rotor will be difficult to rotate smoothly due to the cogging torque of the generator. Therefore, it will take a long time to reach the start-up wind speed to start power generation, and the power generation efficiency is low. . In order to solve this problem, the inventor of the present invention has developed a longitudinal-axis wind power generation device, the windmill of which has lift-type blades (for example, refer to Patent Documents 1 and 2).

On the other hand, when there is strong wind, obstacles caused by over-speed rotation will occur. Regarding the method of controlling high-speed rotation, for example, there is a description in Patent Document 3.

Advanced technical literature Patent literature

[Patent Document 1] Japanese Patent No. 4907073

[Patent Document 2] JP 2011-169292 A

[Patent Document 3] JP 2011-220218 A

Summary of the invention

The vertical axis windmill described in Patent Documents 1 and 2 improves the startability of the vertical axis windmill, and has the following characteristics: even a slight wind speed of about 1~1.5m/s can start the rotation of the rotor, and even in the case of The average wind speed is about 2m/s and it can also generate electricity efficiently at low wind speeds.

In addition, it also has the following characteristics: when the circumferential speed or rotation speed of the rotor reaches a certain value, the lifting force generated on the blade is increased by the Coanda effect, so the rotation of the blade is accelerated and the stall caused by the power generation load is changed. It is not easy to happen, and the efficiency of power generation is improved.

However, since the wind direction often changes, the wind speed suitable for windmills will not last for a long time. If the rotation speed of the rotor rotating at low wind speed can be accelerated by the rotor's own force, it can be accelerated to a certain circumferential speed that can rotate efficiently. , It can further improve the power generation efficiency.

In addition, the vertical axis windmills described in Patent Documents 1 and 2 have high rotation efficiency. Therefore, if the wind speed exceeds a certain wind speed in strong wind, the rotor may rotate beyond the rated number of rotations. Therefore, it is conceivable to set the rated average wind speed of the rotor in advance, and when the wind speed reaches the rated average wind speed or exceeds the rated average wind speed, the rotation of the main shaft is forced to decelerate by a brake device so that the rotor does not rotate beyond the rated number of rotations.

However, if designed in this way, it will not be able to generate electricity efficiently in strong winds.

On the other hand, the method for controlling the rotation of a windmill described in Patent Document 3 mentioned above is to control the windmill when the rotation speed of the windmill is measured by the rotation speed measuring device within a predetermined range for more than a certain period of time. However, this method cannot control the windmill at low wind speeds. When rotating in a non-activated state.

The present invention is constructed in view of the above problems, and aims to provide the following wind turbine rotation speed control method and wind power generation device: at low wind speeds, the rotor rotation speed can be accelerated to a certain speed to greatly improve the power generation efficiency. And in strong wind, it can prevent the rotor from exceeding the rated number of rotations and generate electricity efficiently.

According to the method for controlling the rotation speed of a windmill of the present invention, the above-mentioned problems are solved as follows.

(1) A prime mover is connected to the main shaft of the rotor of the windmill connected to the generator; the following repetitive control is performed: when the wind speed detection element detects a specific average wind speed that can output the generated power from the generator, the prime mover is automatically Start, accelerate rotation until the peripheral speed or rotation speed of the rotor reaches a specific value, and stop the prime mover. When the wind speed detection element detects the specified average wind speed again, the prime mover is automatically restarted to accelerate rotation Until the peripheral speed or rotation speed of the aforementioned rotor reaches the aforementioned specific value, the prime mover is stopped.

According to this method, when the wind speed detecting element detects the specific average wind speed that can output the generated power from the generator, the prime mover is automatically started to accelerate and rotate until the peripheral speed or rotation speed of the rotor reaches a specific value. Make the generator rotate, so even if it’s on the rotor The power generation efficiency can also be improved under the conditions of low rotation speed and low wind speed and low power generation.

In addition, if the rotation is accelerated until the circumferential speed or rotation speed of the rotor reaches a specific value, even without the assistance of the prime mover, the rotor can be accelerated and rotated by its own force by the lift force. Therefore, the prime mover operates for a shorter time and can be restrained. The consumption of the power source that drives the prime mover.

(2) A motor that can be switched to a generator is connected to the main shaft of the rotor of the windmill connected to the main generator; the following repetitive control is performed: when the wind speed detection element detects the predetermined average wind speed, the aforementioned motor is automatically started , To accelerate rotation until the peripheral speed or rotation speed of the rotor reaches a specific value, and the motor is stopped, when the wind speed detection element detects the rated average wind speed of the rotor or the rotation speed detection element detects the rated rotation number of the rotor When the motor is switched to an auxiliary generator to generate electricity by the rotation of the main shaft, when the wind speed detecting element detects the predetermined average wind speed again, the auxiliary generator is switched to a motor and restarted to accelerate rotation Until the peripheral speed or rotation speed of the rotor reaches the specified value, the motor is stopped.

According to this method, when the wind speed detection element detects the predetermined average wind speed, the motor is automatically started and accelerated to rotate until the circumferential speed or rotation speed of the rotor reaches a specific value, so that the generator can be rotated. It can also improve the efficiency of power generation under the conditions of low wind speed and low power generation when the rotating speed of the rotor is low.

In addition, if the rotation is accelerated until the peripheral speed or rotation speed of the rotor reaches a specific value, it can be beneficial even without the assistance of the motor. The rotor is used to accelerate and rotate by its own force. Therefore, the operation time of the motor is shorter, which can suppress the consumption of the power source for driving the motor.

Furthermore, when the rated average wind speed of the rotor or the rated number of rotations of the rotor is detected, the motor will be switched to an auxiliary generator to generate electricity. Therefore, both the main generator and the auxiliary generator can be used to generate electricity in strong winds. , The power generation efficiency is greatly improved. Moreover, when the motor is switched to an auxiliary generator, the rotor will decelerate due to the braking torque caused by the regenerative power generation. Therefore, even if the braking device is not provided to decelerate, the rotor can be prevented from rotating beyond the rated number of rotations.

According to the wind power generator of the present invention, the above-mentioned problems are solved as follows.

(3) Including: a windmill with a rotor, the rotor has a plurality of blades; a generator, connected to the main shaft of the aforementioned rotor; a prime mover, connected to the aforementioned main shaft to allow the main shaft to rotate; a power source to start the aforementioned prime mover; rotation speed detection The element detects the circumferential speed or rotation speed of the aforementioned rotor; the wind speed detection element detects the average wind speed toward the aforementioned rotor; the control element controls the rotation speed of the aforementioned windmill; the aforementioned control element performs the following iterative control: when the aforementioned wind speed detection element detects The specific average wind speed starts the prime mover and accelerates the rotation of the rotor until the rotational speed detecting element detects that the peripheral speed of the rotor or the rotational speed reaches a specific value, and the prime mover is stopped. When the wind speed detecting element detects the foregoing again When the average wind speed is specified, the prime mover is restarted, and the rotation is accelerated until the peripheral speed or rotation speed of the rotor reaches the specified value, so that the prime mover Stop.

According to such a configuration, the control element is controlled to automatically start the prime mover when the wind speed detection element detects a specific average wind speed, so that the rotor accelerates and rotates until the rotation speed detection element detects the peripheral speed of the rotor or the rotation speed reaches a specific speed, and Stop the prime mover. Therefore, the power generation efficiency can be improved even at low wind speeds where the rotor rotation speed is low and the power generation is small.

In addition, the addition of the minimum structural components necessary for the control of the rotation speed of the windmill to a known wind power generation device including a rotor with a plurality of lift-type blades and a generator can improve the power generation efficiency at low wind speeds. It is possible to provide a wind power generation device that is easy to implement and can generate electricity efficiently.

Furthermore, the control element is controlled to make the prime mover rotate until the peripheral speed of the rotor or the rotation speed reaches a specific speed at which the rotor can be accelerated by lifting force and rotate efficiently, and then the prime mover is stopped. Therefore, the prime mover operates for a shorter time Compared with power generation, the consumption of the power source that drives the prime mover is small.

(4) In the above item (3), the main shaft and the prime mover are connected through an electromagnetic clutch; the control element performs the following control: when the wind speed detection element detects a specific average wind speed, the electromagnetic clutch is automatically connected, when When the peripheral speed or rotation speed of the rotor reaches a specific value, the electromagnetic clutch is automatically cut off.

According to such a configuration, the control element is used to control the electromagnetic clutch to cut when the peripheral speed or the rotation speed of the rotor reaches a specific value. It can control the discontinuity of the clutch accurately and in a short time, so the wind power can be used more efficiently to generate electricity.

(5) In the above item (3) or (4), the aforementioned prime mover is a motor, and the power source for starting the motor is the electricity generated by the aforementioned generator.

According to such a configuration, since the power source for starting the motor uses a part of the electric power generated by the generator, no external power supply equipment is required, and a wind power generation device can be installed in a place without external power supply equipment.

(6) In the above item (3) or (4), the aforementioned prime mover is a motor, and the power source for starting the motor is electricity generated by solar panels.

According to such a configuration, since the power source for starting the motor uses the electric power generated by the solar power generation panel, the consumption of the electric power generated by the generator can be reduced, and the electric power can be used effectively.

(7) Containing: a windmill with a rotor, the rotor having a plurality of blades; a main generator, connected to the main shaft of the aforementioned rotor; a motor, connected to the aforementioned main shaft, which can be switched to a generator; a rotation speed detecting element, which detects the difference of the aforementioned rotor Circumferential speed or rotation speed; wind speed detection element, which detects the average wind speed towards the aforementioned rotor; switching element, which electrically switches the aforementioned motor to a generator; control element, which controls the rotation speed of the aforementioned windmill; the aforementioned control element performs the following iterative control : When the wind speed detection element detects the predetermined average wind speed, the motor is started, and the rotor is accelerated to rotate until the rotation speed detection element detects that the peripheral speed or the rotation speed of the rotor reaches a specific value, and the motor is stopped , When the aforementioned wind speed detecting element detects the rated average wind speed of the aforementioned rotor Or when the rotation speed detection element detects the rated number of rotations of the rotor, the switching element causes the motor to switch to an auxiliary generator and controls it to be connected to the main shaft to generate electricity. When the wind speed detection element detects the predetermined average wind speed again At this time, the auxiliary generator is switched to a motor by the switching element and restarted to accelerate rotation until the peripheral speed or the rotation speed of the rotor reaches the specific speed, and the motor is stopped.

According to such a configuration, the control element is controlled to automatically start the motor when the wind speed detection element detects a predetermined average wind speed, and accelerate the rotation of the rotor until the rotation speed detection element detects that the peripheral speed of the rotor or the rotation speed reaches a specific value , And stop the motor. Therefore, the power generation efficiency can be improved even under the conditions of low wind speed and low power generation when the rotation speed of the rotor is low.

In addition, the control element is controlled to make the motor rotate until the peripheral speed of the rotor or the rotation speed reaches a specific speed at which the rotor can be accelerated by the lifting force to rotate efficiently, and then stop the motor. Therefore, the operation time of the motor is shorter. Compared with the power generation, the consumption of the power source that drives the motor is small.

Furthermore, the control element is controlled to switch the motor to an auxiliary generator to generate electricity when the rated average wind speed of the rotor or the rated number of rotations of the rotor is detected. Therefore, the main generator and the auxiliary generator can be used in strong winds. Both parties come to generate electricity, and the power generation efficiency is greatly improved. Moreover, when the motor is switched to an auxiliary generator, the rotor will decelerate due to the braking torque caused by the regenerative power generation. Therefore, even if the braking device is not provided to decelerate, the rotor can be prevented from overshooting. In the case of rotation exceeding the rated number of rotations.

(8) In the above item (3) or (7), the aforementioned windmill is a longitudinal-axis windmill or a horizontal-axis windmill having a rotor, and the rotor has a plurality of lift-type blades with inclined portions formed at the tip.

According to such a configuration, the rotor has a plurality of lift-type blades with inclined parts formed at the front end. The vertical axis windmill or the horizontal axis windmill with the rotor receives the airflow diffused by hitting the inner surface of the blades by the inclined parts. Therefore, the rotational force increases and the lift (thrust) increases. Therefore, the rotor rotates from a low wind speed, and the faster the wind speed, the greater the lift (thrust) generated by the wall effect on the blades, and the blades are accelerated by the lift And the rotor rotates efficiently. Therefore, even if the specific peripheral speed or rotation speed of the rotor is set low, high power generation efficiency can be maintained.

According to the method for controlling the rotation speed of a windmill and the wind power generation device of the present invention, the power generation efficiency can be greatly improved by using a prime mover or a motor to accelerate the rotation speed of the rotor to a certain speed at low wind speeds.

In addition to this effect, in the invention described in claim 2 or 7, since both the main generator and the auxiliary generator can generate electricity in strong winds, the power generation efficiency can be greatly improved, and when the motor is switched to an auxiliary generator The motor and rotor will decelerate due to regenerative braking, so even if there is no brake device to decelerate, it can prevent the situation from rotating beyond the rated number of rotations.

1‧‧‧Wind power plant

2‧‧‧Rotor

3‧‧‧Generator

4‧‧‧Control components

5‧‧‧Vertical spindle

6‧‧‧Support frame

6A‧‧‧Bearing

7A, 7B‧‧‧arm

8‧‧‧Yangli blade

8A‧‧‧Main part

8B‧‧‧Inwardly inclined part

9‧‧‧Controller

10‧‧‧Battery

11‧‧‧Transmission element

11A‧‧‧Driven bevel gear

11B‧‧‧Drive bevel gear

12‧‧‧Electromagnetic clutch

13‧‧‧Reducer

14‧‧‧Motor

15‧‧‧Drive shaft

16‧‧‧Output shaft

17‧‧‧Clutch switching judging section

18‧‧‧Power Supply

19‧‧‧Motor start and stop judging section

20‧‧‧Central Processing Unit

21‧‧‧Gear

22‧‧‧Rotation speed measurement sensor

23‧‧‧Rotor peripheral speed judging section

24‧‧‧Anemometer

25‧‧‧Average Wind Speed Judgment Department

26‧‧‧Solar power panels

27‧‧‧Second battery

28‧‧‧Motor and auxiliary generator

29‧‧‧Toggle switch

29A‧‧‧Motor side contact

29B‧‧‧Charging side contact

30‧‧‧Controller

31‧‧‧Motor‧Auxiliary Generator Switching Judgment Section

32‧‧‧Power Supply

33‧‧‧Disc brake device

34‧‧‧Brake Disc

35‧‧‧Bracket

36‧‧‧Calipers

37‧‧‧Brake Pad

38‧‧‧Electromagnetic Actuator

39‧‧‧Manual brake device

40‧‧‧Large diameter shaft

41‧‧‧Brake Pad

C‧‧‧Wing thickness centerline

G‧‧‧Basic

K‧‧‧Gear box

O‧‧‧Rotation track

W‧‧‧direction

Fig. 1 is a front view of a first embodiment of a wind power generator related to the present invention.

Fig. 2 is an enlarged plan view of the rotor and arms of the wind power generator of the first embodiment.

Fig. 3 is an enlarged cross-sectional plan view of line III-III of Fig. 1.

Fig. 4 is a flowchart of the first embodiment of the method related to the present invention using the wind turbine generator of the first embodiment.

Fig. 5 is a front view of a second embodiment of the wind turbine generator related to the present invention.

Fig. 6 is a front view of a third embodiment of the wind power generator related to the present invention.

Fig. 7 is a flowchart of the second embodiment of the method related to the present invention using the wind power generator of the third embodiment.

The form used to implement the invention

The embodiment of the present invention will be described based on the drawings. Incidentally, although the following embodiments describe a wind power generation device with a longitudinal axis windmill with a blade rotation radius of 1m and a blade length of 1.2m, and a wind power generation method using it, the wind power generation device is of course not limited Here.

Fig. 1 shows a first embodiment of a wind power generation device having a longitudinal axis windmill related to the present invention (the invention described in claim 3). The wind power generation device 1 has a longitudinal axis rotor 2, a generator 3, and a control wind turbine. Rotation speed control element 4.

The longitudinal main shaft 5 of the rotor 2 is supported by the upper and lower multiple parts of the rotor 2 in a freely rotatable manner to be erected on the foundation G through the bearing 6A Supported by the central part of the frame 6. The inner ends of the two upper and lower horizontal arms 7A and 7B are firmly connected to the upper part of the longitudinal main shaft 5 at symmetrical positions in the radial direction.

The inner surfaces of the upper and lower ends of a pair of lift-type blades (hereinafter referred to as blades) 8, 8 in the vertical direction are firmly connected to the outer ends of the upper and lower arms 7A, 7B. The arms 7A, 7B and the blade 8 are formed by fiber-reinforced synthetic resin, for example. Incidentally, the arms 7A, 7B and the blade 8 may be integrally formed.

The shape of the blade 8 is substantially the same as the blade described in Japanese Patent No. 4907073 and Japanese Patent Application Publication No. 2011-169292 developed by the inventor of this application.

That is, the chord length of the blade 8 is the length of 20%-50% of the radius of rotation of the blade 8, and the wing area is set to be large.

As shown in the enlargement of Fig. 3, the cross-sectional shape of the main portion 8A of the blade 8 except for the upper and lower ends is set as follows: the inner wing thickness of the wing thickness center line C of the main portion 8A and the outer wing thickness are mutually The size is almost the same symmetrically, and the wing thickness center line C is almost overlapped with the rotation trajectory O of the wing thickness center of the blade 8.

The overall plane shape of the main portion 8A is as shown in FIG. 2 and is curved in an arc shape along the rotation trajectory O of the wing thickness center. The inner side surface is from the bulging part of the front edge to the rear edge and presents a telecentric direction. Tilt, when the wind hits the inner side from the back, it will push it forward (in the direction of rotation).

The cross-sectional shape of the main portion 8A is similar to a standard airfoil in which the thickness of the wing on the front side in the rotation direction is thicker and gradually becomes thinner as it goes to the rear.

When the blade 8 rotates, due to the difference in the radius of rotation between the inside and the outside of the blade 8, the peripheral speed of the outer surface will be greater than that of the inner surface, and the airflow passing along the outer surface and backward will be faster than the airflow along the inner surface.

Therefore, at the rear edge of the blade 8, the pressure of the airflow passing through the outer side surface will be lower than the pressure of the airflow passing through the inner side surface. Due to the Coanda effect of the outer side surface, the outer side of the rear edge portion of the blade 8 is from the rear to the front edge A thrust in the rotational direction acts on the blade 8 to make the blade 8 rotate.

As shown in FIGS. 1 and 2, the upper and lower ends of the blade 8 are formed with inwardly inclined portions 8B and 8B that are inclined inwardly (that is, in the direction of the longitudinal main axis 5) in an arc shape. Since the upper and lower ends of the blade 8 are formed with an inwardly inclined portion 8B, the airflow flowing in the vertical direction along the inner and outer sides of the main portion 8A as the blade 8 rotates is moved up and down by the Coanda effect The inner and outer surfaces of the inwardly inclined portions 8B, 8B pass backward (that is, the W direction in FIG. 2), and the blade 8 is pushed in the direction of rotation due to the reaction force. Therefore, even at low wind speeds, the rotor 2 It can also be rotated with high rotation efficiency.

The aforementioned generator 3 is a known permanent magnet type single-phase AC or three-phase AC generator installed on the base G, and its rotor shaft (not shown) is connected to the lower end of the longitudinal main shaft 5. The electric power generated by the generator 3 is supplied by the controller 9 with a rectifier, a voltage regulator (not shown), etc., after the battery 10 is stored, from the battery 10 to an external DC load power source, or by the controller 9 And directly supply power to the external AC load power system.

The controller 9 adjusts the output current from the generator 3 to control the current and voltage output to the battery 10 or the DC load power supply. For example, at a low wind speed when the rotor 2 has just started or the rotation speed of the rotor 2 has slowed down When the output current is reduced, the power generation load imposed on the generator 3 is reduced and the rotor 2 is prevented from stalling.

Incidentally, the generator 3 can also be a DC generator capable of directly supplying electric power to the battery 10 or the DC load power system.

At the lower part of the longitudinal main shaft 5, a DC motor 14 with a reducer 13 as a prime mover is connected in parallel with the generator 3 through a transmission element 11 and a clutch 12. The transmission element 11 is composed of a driven bevel gear 11A firmly connected to the longitudinal main shaft 5, and a drive bevel gear 11B that meshes with the driven bevel gear 11A in a manner orthogonal to the axis, and is firmly connected to the drive bevel gear Between the drive shaft 15 of 11B and the output shaft 16 of the reducer 13 is a clutch 12 for intermittent power transmission.

The clutch 12 is a known electromagnetic clutch that is electrically opened and closed. Incidentally, the transmission element 11 should be stored in a gear box K as indicated by a 1-dot chain line and hidden.

The control element 4 has a clutch switching determination unit 17 and a power supply (power supply circuit) 18 connected to the battery 10 and turned on and off based on a control signal output from the clutch switching determination unit 17.

Although the detailed description is described later, the clutch switching determination unit 17 outputs a control signal to turn on the power supply 18 when the anemometer 24 described below detects a specific average wind speed, and the power of the battery 10 is sent to the electromagnetic through the power supply 18 The clutch 12 supplies power, whereby the electromagnetic clutch 12 becomes connected.

Incidentally, with regard to the time for detecting the average wind speed by the anemometer 24, in order not to cause the power generation to fluctuate significantly at low wind speeds, it is advisable to use, for example, 3 It can be detected at intervals of seconds to 10 seconds.

When the electromagnetic clutch 12 is connected, the rotational driving force of the motor 14 is decelerated and transmitted to the driving bevel gear 11B and the driven bevel gear 11A through the speed reducer 13, and the vertical main shaft 5 is rotated and driven with a large driving torque. In addition, when the control signal for turning off is output to the power supply 18 by the clutch switching determination unit 17, the electromagnetic clutch 12 is cut off, and the power transmission between the longitudinal main shaft 5 and the motor 14 is cut off.

The motor 14 is also connected to the power supply 18, and based on the motor start and motor stop determination signals output from the motor start and stop determination section 19 of the control element 4, the power supply from the power supply 18 is turned on and off to start or stop the motor 14 .

Incidentally, although the detailed description is described later, the central processing unit (CPU) 20 of the control element 4 is based on input from the rotation speed sensor 22 and anemometer 24 described later to the rotor peripheral speed determination unit 23 and the average wind speed determination. The judgment signal of the calculation processing based on the data of the part 25 is output to the clutch switching judgment part 17 and the motor start/stop judgment part 19 described above.

A gear 21 for measuring the rotation speed is installed at an appropriate place in the middle of the longitudinal main shaft 5. The rotation speed of the gear 21 can be measured by the rotation speed measuring sensor 22, and the rotor 2 can be measured through the longitudinal main shaft 5. spinning speed.

Incidentally, instead of the gear 21, for example, one or more convex portions may be provided on the outer peripheral surface of the longitudinal main shaft 5.

The rotation speed measurement sensor 22 is, for example, a magnetic rotation speed measurement sensor, an ultrasonic rotation speed measurement sensor, a rotary encoder, etc. The non-contact sensor.

The rotation speed measured by the rotation speed measurement sensor 22 is input to the rotor circumferential speed judging section 23 of the control element 4. The central processing unit 20 of the control element 4 calculates the average circumference of the rotor 2 based on the input rotation speed speed.

That is, since the outer circumferential length (2πr) of the rotor 2 can be determined by the radius of rotation (r) of the blades 8 of the rotor 2, the outer circumferential length (2πr) is multiplied by the rotation speed (rpm) of the longitudinal main shaft 5 to convert it. Into the peripheral speed (m/s).

Incidentally, the circumferential velocity of the rotor 2 can also be obtained by measuring the angular velocity of the blade 8 using a sensor. That is, the value obtained by multiplying the angular velocity (rad/s) of the blade 8 by the radius of rotation (r) will be the circumferential velocity of the rotor 2.

When the rotor peripheral speed determination unit 23 determines that the average peripheral speed of the rotor 2 has reached 5 m/s, which is a specific peripheral speed, it outputs a determination signal to the clutch switching determination unit 17 and the motor start/stop determination unit 19. Incidentally, the rotation speed measurement sensor 22 and the rotor circumferential speed determination unit 23 are equivalent to the rotation speed detection element related to the present invention.

Above the rotor 2, an anemometer 24 as a wind speed detecting element is installed on the pillar shown in the figure to detect the average wind speed of the wind toward the rotor 2 for a certain period of time. The average wind speed measured by the anemometer 24 is input to the average wind speed determination unit 25 of the control element 4, and the central processing unit (CPU) 20 performs calculation processing and when it is determined that the wind speed reaches a specific average wind speed (ie, for example, In other words, when the generator 3 can output the generated power at a wind speed of 2m/s), the determination signal is output to the aforementioned clutch switching determination unit 17 and the motor start/stop determination unit 19.

Next, with reference to the flowchart shown in FIG. 4, the first embodiment of the method of the present invention (the invention described in claim 1) using the above-mentioned wind power generator 1 related to the first embodiment will be described.

First, the anemometer 24 measures the average wind speed when the rotor 2 is rotating (S1), and the average wind speed determination unit 25 determines whether the average wind speed is detected as a specific average wind speed based on the calculation processing result of the central processing device 20 of the control element 4 2m/s(S2). Incidentally, when the average wind speed is 2 m/s or less, the electromagnetic clutch 12 is in the closed state.

When the average wind speed determination unit 25 determines that the average wind speed has reached 2m/s, the electromagnetic clutch 12 is energized by the determination signal output from the clutch switching determination unit 17 to the power supply 18, and the electromagnetic clutch 12 is turned on (S3) , And connect the drive shaft 15 with the output shaft 16.

In addition, at the same time, the power supply 18 is turned on by the motor start signal output from the motor start and stop determination unit 19, and the motor 14 is automatically started (S4), and the vertical spindle 5 is forced to rotate through the transmission element 11, and The rotor 2 is accelerated to rotate (S5). When it is determined that the average wind speed has not reached 2 m/s, return to step S1 and continue to measure the average wind speed.

Incidentally, although the generator 3 can also generate electricity during the rotation acceleration of the rotor 2 by the motor 14, it can also be generated by the controller 9 only at a certain time from the start of the motor 14 The amount of output current from the generator 3 is automatically reduced.

In this way, since the load applied to the generator 3 at the beginning of acceleration can be reduced, the rotor 2 can be quickly accelerated by the motor 14.

The reason for judging whether the average wind speed reaches 2m/s is because of the following Practical proof has been obtained: in the case of the longitudinal axis rotor 2 with the above-mentioned shape of the lifting blade 8, for example, when the radius of rotation of the blade 8 is 1m and the wing length of the blade 8 is 1.2m, if the average wind speed reaches 2m /s, the rotation of the rotor 2 is accelerated by the lifting force generated by the blade 8 and rotates at a speed at which the generator 3 can output the generated electric power.

Therefore, if the motor 14 is started and the rotation of the rotor 2 is immediately accelerated when the rotor 2 rotates at a low wind speed of 2 m/s, the blades 8 will generate lift to accelerate more and generate electricity more efficiently.

After accelerating the rotation of the rotor 2, the average rotation speed of the longitudinal spindle 5 is measured by the rotation speed measuring sensor 22, and the central processing unit 20 converts the circumferential speed of the rotor 2 based on the rotation number, and converts the result to the circumference of the rotor. The speed determination unit 23 outputs (S6), and the rotor peripheral speed determination unit 23 determines whether the peripheral speed of the rotor 2 has reached a specific peripheral speed exceeding the average wind speed of 2 m/s, for example, 5 m/s (S7).

The reason for judging whether the peripheral speed of the rotor 2 reaches 5m/s is because the following has been actually proved: in the longitudinal axis type rotor 2 of the lifting blade 8 with the aforementioned shape, if the peripheral speed of the rotor 2 reaches 5m/s, Because of the action of the inwardly inclined portions 8B at the upper and lower ends of the blade 8 and the Coanda effect, the lift (thrust) generated on the blade 8 increases, and the rotor 2 accelerates to a peripheral speed exceeding the wind speed even without the assistance of the motor 14 And it rotates efficiently to generate electricity, and the stall caused by the power generation load becomes less likely to occur.

Incidentally, with regard to the rotation speed of the rotor 2 in the case of a peripheral speed of 5m/s, since the peripheral speed, the rotation speed and the outer circumference length have the above-mentioned relationship, and for example, when the rotation radius (r) of the blade 8 is 1m , The outer circumference length (2πr) of the rotor 2 is 6.28m. Therefore, by dividing the peripheral speed of 5 m/s by the outer circumference of 6.28 m and multiplying it by 60 to convert the component speed, the rotation speed of the rotor 2 is about 48 rpm.

When the rotor peripheral speed determination unit 23 determines that the peripheral speed of the rotor 2 has reached 5 m/s, the clutch switching determination unit 17 outputs a shutdown determination signal to the power supply 18, thereby closing the electromagnetic clutch 12 (S8), At the same time, the motor 14 is stopped by the motor stop signal sent from the motor start-stop judging unit 19 (S9), and the acceleration rotation of the rotor 2 is stopped.

In this way, since the electromagnetic clutch 12 is closed when the circumferential speed of the rotor 2 reaches 5 m/s, the rotation load caused by the cogging torque of the motor 14 is not transmitted to the longitudinal main shaft 5, so the rotation efficiency of the rotor 2 is improved.

When the rotor peripheral speed determining unit 23 determines that the peripheral speed of the rotor 2 has not reached 5 m/s, it returns to step S5 to maintain the connected state of the electromagnetic clutch 12 and the motor 14 continues to accelerate the rotation of the rotor 2.

After stopping the motor 14 and stopping the acceleration and rotation of the rotor 2, the average wind speed is measured again by the anemometer 24 (S10). When the average wind speed determination unit 25 detects the average wind speed of 2m/s again (S11), Returning to step S3, as described above, the electromagnetic clutch 12 is turned on, and at the same time, the motor 14 is automatically restarted to accelerate the rotation of the rotor 2. By repeating the steps S3 to S11 in a loop to control the rotation speed of the rotor 2, the power generation efficiency can be greatly improved.

As explained above, in the rotation speed control method of the windmill related to the above-mentioned first embodiment, when the rotor 2 rotates at a low wind speed of 2m/s, in order to make the rotor 2 accelerate independently. Rotating efficiently at a peripheral speed of 5m/s, the motor 14 is immediately accelerated to repeatedly control the rotation speed of the rotor 2 so that even when the rotor 2 rotates at a low wind speed and the amount of power generation is small, The power generation efficiency can be improved without drastically changing the power generation.

In addition, the peripheral speed of the rotor 2 that stops the motor 14 is set at a low speed of, for example, 5m/s. When the peripheral speed of the rotor 2 reaches 5m/s, even if the motor 14 stops automatically, the blades will continue to rotate by lifting force. During this period, if there is wind blowing, the rotation will be accelerated. Therefore, the motor 14 does not need to be operated frequently, and its power consumption can be reduced.

Next, the second embodiment of the wind power generator related to the present invention (the invention described in claim 6) will be described with reference to FIG. 5. Incidentally, the same components as those of the wind power generator of the first embodiment described above are only assigned the same reference numerals, and detailed descriptions are omitted.

The wind power generator of the second embodiment is configured by adding a solar power generation panel 26 and a second storage battery 27 that stores electric power generated by the solar power generation panel 26 to the wind power generation system 1 of the first embodiment described above.

The electric power generated by the generator 3 is stored in the first storage battery 10 in the same manner as in the wind power generator 1 of the first embodiment described above. The control element 4 has the same structure as that of the first embodiment.

The second battery 27 is connected to the power supply 18 of the control element 4, and when a motor start signal is output from the motor start/stop determination unit 19, the power of the second storage battery 27 is supplied to the motor 14 through the power supply 18.

In addition, as shown by the dotted line, the excess electricity generated by the solar panel 26 The power can also be stored in the first storage battery 10.

The control of the rotation speed of the windmill using the wind turbine generator of the second embodiment uses the same method as that performed by the wind turbine generator 1 of the first embodiment described above, so detailed descriptions thereof will be omitted.

In the wind power generator of the second embodiment, since the driving power of the motor 14 is generated by the solar power panel 26 and stored in the second battery 27, the power generated by the generator 3 is not consumed. Use this power efficiently.

Incidentally, considering that the amount of power generated by the solar power generation panel 26 is reduced, as shown by the dotted line, the motor 14 may be driven by the electric power of the first storage battery 10 or the electric power of both the first storage battery 10 and the second storage battery 27. .

Next, referring to Fig. 6, a third embodiment of the wind power generator related to the present invention (the invention described in claim 7) will be described. Incidentally, the same components as those of the wind turbine generator 1 of the first embodiment described above are only assigned the same reference numerals, and detailed descriptions are omitted.

The wind power generator related to the third embodiment uses a generator connected to the longitudinal main shaft 5 of the rotor 2 as the main generator 3, and uses a motor and auxiliary generator 28 that can be switched to a generator instead of the first embodiment Recorded motor 14. The motor and auxiliary generator 28 is, for example, a permanent magnet-based magnetic field type DC motor that can be switched to a generator, or a permanent magnet type AC synchronous motor, etc., which can be switched to the case where the vertical main shaft 5 is rotated through the switch 29 Under the motor, and the situation of generating electricity by the rotation of the vertical spindle 5 Auxiliary generator under the condition.

The switch 29 is a neutral return type (normally open) switch with a motor-side contact 29A and a charging-side contact 29B. When the switch 29 is switched from the neutral position to the motor-side contact 29A, the motor also serves as an auxiliary generator 28 is switched to a motor and driven by the electric power of the second battery 27. Incidentally, when a permanent magnet AC synchronous motor is used for the motor and auxiliary generator 28, a converter as a DC-AC mutual conversion circuit is added between the motor and auxiliary generator 28 and the switch 29.

When the switch 29 is switched from the neutral position to the charging side contact 29B, the motor and auxiliary generator 28 is switched to an auxiliary generator, and the electric power generated by the auxiliary generator is passed through a controller with a voltage regulator, etc. 30, the second storage battery 27 that stores the electric power of the solar power generation panel 26 is charged.

Incidentally, it may also be a situation where the excess power generated by switching the motor and auxiliary generator 28 to an auxiliary generator is also charged through the controller 30 to charge the first battery 10, the first battery 10 and the second battery 27 They are connected in parallel, and power is supplied from both of the first and second storage batteries 10 and 27 to an external DC load power source or the like.

The control element 4 has the same clutch switching determination unit 17, central processing unit 20, rotor circumferential speed determination unit 23, and average wind speed determination unit 25 as in the first embodiment, as well as a motor/auxiliary generator switching determination unit 31 , And a power supply (power supply circuit) 32 connected to the second storage battery 27 and turned on and off based on the control signal output from the clutch switching determination unit 17.

When the anemometer 24 detects the predetermined average wind speed of 2m/s, the clutch switching determination unit 17 outputs a control signal to turn on the power supply 32, and the power of the second battery 27 is supplied to the electromagnetic clutch 12 through the power supply 32. Thereby, the electromagnetic clutch 12 becomes connected.

When the electromagnetic clutch 12 is connected, the motor and auxiliary generator 28 and the longitudinal main shaft 5 are connected through the driving bevel gear 11B and the driven bevel gear 11A of the transmission element 11. In addition, when the control signal for closing is output from the clutch switching determination unit 17 to the power supply 32, the electromagnetic clutch 12 is cut off, and the power transmission between the motor and auxiliary generator 28 and the longitudinal main shaft 5 is cut off.

The aforementioned switch 29 is switched based on the determination signal output from the motor/auxiliary generator switching determination unit 31 of the control element 4 to start or stop the motor and auxiliary generator 28 as a motor, or switch to an auxiliary generator. Or stop.

Incidentally, the central processing unit (CPU) 20 of the control element 4 calculates and processes the determination based on the data input from the rotation speed sensor 22 and the anemometer 24 to the rotor peripheral speed determination section 23 and the average wind speed determination section 25 The signal is output to the clutch switching determination unit 17 and the motor/auxiliary generator switching determination unit 31.

When the rotor peripheral speed determination unit 23 determines that the average peripheral speed of the rotor 2 has reached, for example, 5m/s, which is a specific peripheral speed, it outputs a determination signal to the clutch switching determination unit 17 and the motor/auxiliary generator switching determination unit 31 .

When the average wind speed determination unit 25 determines that the detected wind speed is average When the wind speed is 2 m/s, and when the rated average wind speed of the rotor 2 is detected, for example, 13 m/s, the determination signal is output to the aforementioned clutch switching determination unit 17 and the motor/auxiliary generator switching determination unit 31.

A brake device, such as a disc brake device 33, which mechanically decelerates or stops the rotation of the rotor 2 is provided in the middle of the longitudinal main shaft 5.

The disc brake device 33 has: a large-diameter brake disc 34 firmly attached to the middle part of the longitudinal main shaft 5; a caliper 36, which can move up and down by accommodating a part of the peripheral end of the brake disc 34 and It is not rotatably installed on the bracket 35, which is fixed in the middle part of the supporting frame 6. The upper and lower pair of brake pads 37, 37 are arranged inside the caliper 36, which can squeeze the brake disc 34 The upper and lower surfaces of the peripheral end; the electromagnetic actuator 38 formed by the solenoid is housed in the caliper 36, and the upper brake pad 37 can be squeezed by the lower end of the plunger facing downward Above.

The electromagnetic actuator 38 is turned on by the power supply signal from the rotor peripheral speed determining part 23 of the control element 4 when the peripheral speed or the rotational speed of the rotor 2 exceeds a predetermined rated value (allowable value). The plunger protrudes downward so that the upper brake pad 37 is pressed against the peripheral end of the brake disc 34, and the reaction force causes the caliper 36 to move upward, and the lower brake pad 37 is pressed against the brake disc. Below the peripheral end of the sheet 34. With the friction force at this time, the braking force acts on the brake disc 34 and the longitudinal main shaft 5, and the rotation of the rotor 2 will decelerate or stop.

A manual brake device 39 is provided below the disc brake device 33. When there is a strong wind or an abnormal situation occurs in the wind power generator, the rotation of the rotor 2 is urgently stopped by manual operation. About this manual brake The device 39, for example, can use a well-known manual brake device, which has a pair of left and right semicircular brake pads 41, 41, which are aligned with the outer circumference of the large-diameter shaft portion 40 formed in the middle of the longitudinal main shaft 5. The face-to-face and advance and retreat method is supported by a non-moving support body not shown; a manual operating lever (not shown) is used to push the two brake pads 41 on the outer peripheral surface of the large-diameter shaft portion 40.

Next, with reference to the flowchart shown in FIG. 7, the second embodiment of the method of the present invention (the invention described in claim 2) using the wind power generator related to the third embodiment described above will be described.

First, the average wind speed (S1) when the rotor 2 is rotating is measured by the anemometer 24, and the average wind speed determination unit 25 determines whether the predetermined average wind speed 2m/ is detected based on the calculation processing result of the central processing device 20 of the control element 4 s or higher (S2). Incidentally, when the average wind speed is less than 2 m/s, the electromagnetic clutch 12 is in the closed state.

When the average wind speed determination unit 25 determines that the average wind speed has reached 2m/s or higher, the determination signal output from the clutch switching determination unit 17 to the power supply 32 energizes the electromagnetic clutch 12 and turns on the electromagnetic clutch 12 (S3), and the drive shaft 15 and the output shaft 16 are connected. At the same time, by the switching signal output from the motor/auxiliary generator switching determination unit 31, the switching switch 29 in the neutral position is switched to the motor side contact 29A (S4).

Thereby, the motor and auxiliary generator 28 is switched to a motor and automatically started (S5), the vertical main shaft 5 is forcibly rotated through the transmission element 11, and the rotor 2 is accelerated to rotate (S6). When it is determined that the average wind speed has not reached 2 m/s, return to step S1 and continue to measure the average wind speed.

The reason for determining whether the average wind speed becomes 2m/s or higher is related to The foregoing reasons are the same. Therefore, when the rotor 2 rotates at a low wind speed of about 2 m/s, the motor and auxiliary generator 28 is switched to a motor to immediately accelerate the rotation of the rotor 2, and then the blades 8 will generate a positive force. The more speed up, the more efficient power generation can be done.

After accelerating the rotation of the rotor 2, the average rotation speed of the longitudinal spindle 5 is measured by the rotation speed measuring sensor 22, and the central processing unit 20 converts the circumferential speed of the rotor 2 based on the rotation number, and converts the result to the circumference of the rotor. The speed determination unit 23 outputs (S7), and the rotor peripheral speed determination unit 23 determines whether the peripheral speed of the rotor 2 is detected to be a specific peripheral speed exceeding the average wind speed by 2 m/s, for example, 5 m/s (S8). Incidentally, the reason for judging whether the peripheral speed of the rotor 2 is 5m/s is the same as the above-mentioned reason, because the following has been actually proved: if the peripheral speed reaches 5m/s, it is because the upper and lower ends of the blade 8 are inward The action of the inclined portion 8b and the Coanda effect increase the lifting force (thrust) acting on the blade 8. Even without the assistance of the motor, the blade 8 is accelerated to a peripheral speed exceeding the wind speed by the lifting force and rotates efficiently to generate electricity, and Stalls caused by power generation load become less likely to occur.

When the rotor peripheral speed determination unit 23 determines that the peripheral speed of the rotor 2 has reached 5 m/s, the clutch switching determination unit 17 outputs a shutdown determination signal to the power supply 32, thereby closing the electromagnetic clutch 12 (S9), At the same time, the switch 29 is returned to the neutral position and closed by the switch signal output from the motor/auxiliary generator switch determination unit 31 (S10), the motor is stopped (S11), and the acceleration rotation of the rotor 2 is stopped.

In this way, since the electromagnetic clutch 12 is closed when the circumferential speed of the rotor 2 reaches 5m/s, the rotation load caused by the cogging torque of the motor changes The result is not transmitted to the longitudinal main shaft 5, so the rotation efficiency of the rotor 2 is improved.

When the rotor peripheral speed determination unit 23 determines that the peripheral speed of the rotor 2 has not reached 5 m/s, it returns to step S6, maintains the connected state of the electromagnetic clutch 12, and continues to accelerate the rotation of the rotor 2 by the motor.

After stopping the motor and stopping the acceleration and rotation of the rotor 2, the average wind speed is measured again by the anemometer 24 (S12). When the average wind speed determination unit 25 detects that the rated average wind speed of the rotor 2 is 13m/s (S13 ), the electromagnetic clutch 12 is turned on based on the signal output from the clutch switch judging unit 17 to the power supply 32 (S14), and at the same time, the position is switched to the neutral position based on the signal output from the motor/auxiliary generator switch judging unit 31 The switch 29 is switched to the charging side contact 29B side (S15).

When the switch 29 is switched to the charging side contact 29B, the motor and auxiliary generator 28 is switched to an auxiliary generator to start (S16), and the vertical main shaft 5 drives the rotor (armature) of the auxiliary generator to rotate and generate electricity .

When generating electricity, the rotational energy of the rotor 2 is converted into electrical energy, whereby the regenerative brake acts on the rotor 2 and decelerates.

Therefore, even when the wind is strong, it is possible to prevent the rotor 2 from rotating beyond the rated number of rotations. The electric power generated by the auxiliary generator charges the second storage battery 27 through the switch 29 and the controller 30.

Incidentally, the controller 30 can control the output current from the auxiliary generator to adjust the power generation load applied to the auxiliary generator, thereby controlling the rotor 2 to rotate without exceeding the rated number of rotations.

In addition, if the average wind speed exceeds 13m/s in strong winds, the rotor 2 is controlled to rotate at a rotation speed slightly lower than the rated number of rotations, then The power generation efficiency of the auxiliary generator is increased. When the rated average wind speed of 13 m/s is not detected, return to step S12 and continue to measure the average wind speed.

When switching to an auxiliary generator for power generation, the average wind speed is measured by the anemometer 24 (S17), and when the average wind speed determination unit 25 determines that the average wind speed has fallen below 2m/s (S18), return to step S4, similar to the above, the switch 29 is switched to the motor side contact 29A, the motor and auxiliary generator 28 is switched from the previous auxiliary generator to the motor and restarted automatically, and the rotor 2 is accelerated to rotate until the peripheral speed reaches 5m/s.

As explained above, in the rotation speed control method of the windmill related to the second embodiment, when the rotor 2 rotates at a low wind speed of about 2m/s, the blade 8 is accelerated by the lifting force, and the motor also assists The generator 28 is switched to a motor and accelerates immediately until a peripheral speed of 5m/s that can rotate efficiently is achieved, and the rotation speed of the rotor 2 is repeatedly controlled, thereby, even at low wind speeds, the generated power does not change significantly and Improve power generation efficiency.

In addition, since the motor and auxiliary generator 28 will switch to an auxiliary generator to generate electricity when the wind speed reaches, for example, the rated average wind speed of 13m/s, it can be generated by both the main generator 3 and the auxiliary generator during strong winds. The efficiency is greatly improved. Moreover, when the motor and auxiliary generator 28 is switched to the auxiliary generator, the rotor 2 will be decelerated due to the braking torque caused by the regenerative power generation, so it is possible to prevent the situation from rotating beyond the rated number of rotations.

When switching the motor and auxiliary generator 28 to an auxiliary generator is not enough to prevent the rotor 2 from over-speeding, the disc brake device 33 can be used together, so there is no risk of the rotor 2 from rotating over-speed even in strong winds.

In addition, when the rotor 2 cannot be prevented from over-rotating even if the disc brake device 33 is operated, the wind power generator is abnormal, etc., the manual brake device 39 can be operated to forcibly stop the rotor 2 so that the rotor 2 can be prevented. The blade 8 is damaged.

The present invention is not limited to the above-mentioned embodiment, and various modifications or changes as described below are possible within the scope not deviating from the gist of the present invention.

Although in each of the above embodiments, the motor is started to accelerate the rotation of the rotor 2 when it is detected that the average wind speed becomes, for example, 2m/s, it may also be the average rotation speed of the longitudinal main shaft 5 when the average wind speed is 2m/s. , Or when the peripheral speed of the rotor 2 at an average wind speed of 2m/s is detected, the motor is started and the rotor 2 is accelerated.

In addition, although the above embodiments use the motor to accelerate the peripheral speed of the rotor 2 to 5m/s to stop the motor, as mentioned above, because the peripheral speed of the rotor 2 can be converted into the rotational speed, it can also be the same as the rotational speed. When the measuring sensor 22 measures the rotation speed of the rotor 2 when the peripheral speed reaches 5 m/s, the motor is stopped.

Although the above embodiment uses 2m/s as an example of the average wind speed for starting the motor, this can be appropriately set according to the size of the radius of rotation of the blade 8.

That is, when the radius of rotation of the blade 8 is smaller than 1m in the above embodiment, the rotation torque of the rotor 2 becomes smaller, and it is easier to stall due to the power generation load, so the average wind speed can be set to 2m/s or more , The motor is started when the rotation speed of the rotor 2 is high.

In addition, when the radius of rotation of the blade 8 is larger than 1m, even if the rotation speed of the rotor 2 is low, the rotation torque is large and can generate electricity, so it can be set to an average wind speed below 2m/s, so that the motor is in the rotor 2. It starts when the rotation speed is low.

Although the above embodiment stops the motor when the peripheral speed of the rotor 2 reaches 5 m/s, the peripheral speed of the rotor 2 when the motor is stopped is appropriately set according to the size of the rotation radius of the blade 8.

Although the above embodiment uses the storage battery 10, 27 that stores the power generated by the generator 3 or the solar power panel 26 as the power source for starting the motor, it is not necessary to use such power stored in the storage battery 10, 27. , And the electric power generated by the generator 3 or the solar power generation board 26 is used to directly start the motor.

In this case, the motor can be started by a converter such as an AC-DC converter. In addition, when there is a commercial power source near the installation site of the wind power generation device, the motor can also be started by the power.

In the wind power generator of the first embodiment, an AC motor may be used instead of the above-mentioned DC motor 14 as the prime mover for rotating the longitudinal main shaft 5. In addition, for example, an oil driven by a commercial power source or the like may also be used. A hydraulic motor that is connected to a hydraulic pump to rotate by pressing oil, or a fluid pressure motor such as a pneumatic motor that is connected to an air compressor driven by a commercial power supply and rotated by compressed air.

Although the electromagnetic clutch 12 is used to make the power transmission of the output shaft 16 of the reducer 13 intermittent in each of the above embodiments, a mechanical clutch such as a telecentric clutch may also be used. In this case, there will be no need The clutch switching determination unit 17 of the component 4 to be controlled.

Incidentally, in some cases, a clutch mechanism such as an electromagnetic clutch 12 that causes the power transmission of the drive shaft 15 and the output shaft 16 of the reducer 13 to become intermittent is omitted.

Although in the wind power generator related to the third embodiment described above, the electric power generated when the motor and auxiliary generator 28 is switched to an auxiliary generator is stored in the second battery 27, the second battery 27 may be omitted and the second battery 27 may be omitted. 1 The storage battery 10 is charged. In this case, it is conceivable to increase the number of the first storage batteries 10 or increase the storage capacity. In addition, in this case, the first battery 10 may be used to supply electric power for starting the motor and auxiliary generator 28 as a motor and electric power for operating the electromagnetic clutch 12.

The present invention can also be applied to a wind power generation device in which lift-type blades are fixed to the longitudinal main shaft 5 in multiple segments as described in Figure 4 of Japanese Patent No. 490773, or a wind power generation device with blades as described in Japanese Patent No. 4740580. A wind power generator with a horizontal axis windmill whose front end is inclined toward the main axis (wind receiving direction).

1‧‧‧Wind power plant

2‧‧‧Rotor

3‧‧‧Generator

4‧‧‧Control components

5‧‧‧Vertical spindle

6‧‧‧Support frame

6A‧‧‧Bearing

7A, 7B‧‧‧arm

8‧‧‧Yangli blade

8A‧‧‧Main part

8B‧‧‧Inwardly inclined part

9‧‧‧Controller

10‧‧‧Battery

11‧‧‧Transmission element

11A‧‧‧Driven bevel gear

11B‧‧‧Drive bevel gear

12‧‧‧Electromagnetic clutch

13‧‧‧Reducer

14‧‧‧Motor

15‧‧‧Drive shaft

16‧‧‧Output shaft

17‧‧‧Clutch switching judging section

18‧‧‧Power Supply

19‧‧‧Motor start and stop judging section

20‧‧‧Central Processing Unit

21‧‧‧Gear

22‧‧‧Rotation speed measurement sensor

23‧‧‧Rotor peripheral speed judging section

24‧‧‧Anemometer

25‧‧‧Average Wind Speed Judgment Department

G‧‧‧Basic

K‧‧‧Gear box

Claims (4)

A method for controlling the rotation speed of a windmill, characterized in that: in a windmill provided with a rotor with a plurality of lift-type blades fixed around a longitudinal main shaft, a prime mover is connected to the aforementioned longitudinal main shaft connected to a generator via a transmission element and a clutch, The prime mover is controlled by a control element. The aforementioned control element is equipped with: an average wind speed determination unit; a rotor peripheral speed determination unit; a clutch switching determination unit; a motor start and stop determination unit; a central processing unit and a power supply unit, and perform the following repeated control: When the rotor rotates at a breeze speed slower than the predetermined specific average wind speed, and when the average wind speed determination unit detects the specific average wind speed that can output the power generated by the generator, the clutch switching determination unit turns on the output to the power supply Signal to turn on the clutch, and the motor start/stop judging unit sends a motor start signal to the power supply to start the aforementioned prime mover, so that the acceleration by the prime mover and the rotation of the rotor by the wind continue until the rotation speed of the rotor reaches a specified value When the rotor peripheral speed determination unit determines that it reaches a specific peripheral speed, the clutch switching determination unit will send a closing signal to the power supply to close the clutch, and the motor start and stop determination unit will send a motor stop signal to stop the aforementioned prime mover. The rotor is rotated by the wind, and when the average wind speed determination unit detects a specific average wind speed capable of outputting the generated power again, the clutch switching determination unit operates to turn on the clutch, so that the prime mover restarts and continues to advance. Accelerate until the rotation speed of the rotor reaches the specified peripheral speed, and the prime mover is stopped. A method for controlling the rotation speed of a windmill, which is characterized in that: the main shaft of a windmill with a rotor with a plurality of lift-type blades is connected to a switchable different from that of the main generator via an electromagnetic clutch that is turned on and off by a control element The aforementioned control element is equipped with: average wind speed judging part; rotor peripheral speed judging part; clutch switching judging part; motor and auxiliary generator switching judging part; central processing unit, and performs the following iterative control: the rotor is driven by the wind When the wind speed detecting element detects the predetermined reference average wind speed, the motor is automatically started by the control element to accelerate rotation until the peripheral speed or rotation speed of the rotor reaches a specific upper limit, and the motor is Stop, when the wind speed detection element detects the rated average wind speed of the rotor or the rotation speed detection element detects the rated number of rotations of the rotor, the control element switches the motor to an auxiliary generator and the main shaft rotates Generate electricity, and make the regenerative brake act on the rotor. When the wind speed detection element detects the predetermined reference average wind speed again, the control element switches the auxiliary generator to a motor and restarts to accelerate rotation until the rotor is When the peripheral speed or the rotation speed reaches the aforementioned specific upper limit, the aforementioned motor is stopped and the rotor is rotated by wind. A wind power generation device, characterized by comprising: a windmill with a rotor, the rotor having a plurality of blades; a generator connected to the main shaft of the rotor; a prime mover, connected to the main shaft via a transmission element and a clutch, so that the main shaft can rotate; Power source to start the prime mover; rotation speed detection element to detect the circumferential speed or rotation speed of the rotor; wind speed detection element to detect the average wind speed toward the rotor; control element to control the rotation speed of the windmill; the control element has: equipped The average wind speed judging part of the anemometer; the rotor peripheral speed judging part with the rotation speed measuring sensor; the clutch switching judging part; the motor start and stop judging part; When the predetermined specific average wind speed rotates at a low breeze speed, and when the aforementioned specific average wind speed is detected by the aforementioned wind speed detection element, power is supplied from the power supply by the judgment of the aforementioned motor start and stop judging unit to start the prime mover and the clutch at the same time The switching determination unit supplies power from the power supply, turns on the clutch and rotates the vertical spindle, accelerates the rotation of the rotor until the rotation speed detection element detects the peripheral speed of the rotor or the rotation speed reaches a specific speed, and then stops the supply from the power supply. Electricity supplies power to make the clutch close and stop the prime mover. When the wind speed detection element detects the specific average wind speed again, the clutch is turned on and the prime mover restarts to accelerate and rotate. When the peripheral speed or rotation speed of the rotor reaches the specified speed, the prime mover is stopped. A wind power generation device, characterized in that: the main shaft of the rotor of a windmill having a rotor with a plurality of blades is connected to a main generator, and a motor that can be switched into a generator is opened and closed by a control element through an electromagnetic clutch Connected to the main shaft; the aforementioned control element is equipped with: average wind speed judging part; rotor peripheral speed judging part; clutch switching judging part; motor and auxiliary generator switching judging part; central processing unit. The aforementioned control element performs the following iterative control: when average When the wind speed determination unit detects a predetermined reference average wind speed when the rotor is rotating, the motor is started and the rotation speed of the rotor is increased to accelerate the rotation of the rotor until the rotor peripheral speed determination unit detects the rotation peripheral speed or the rotation speed of the rotor When the specified upper limit is reached, the motor is stopped and the rotor is rotated by the wind. When the average wind speed determination unit detects the rated average wind speed of the rotor, or the rotor peripheral speed determination unit detects the rated rotation number of the rotor When the motor/auxiliary generator switching determination unit causes the motor to be switched to an auxiliary generator, and is controlled to be connected to the main shaft to generate electricity, and when the average wind speed determination unit detects the predetermined reference average wind speed again, the motor ‧The auxiliary generator switching determination unit switches the auxiliary generator to a motor and drives the rotor to rotate with the motor, and accelerates the rotation until the peripheral speed or the rotation speed of the rotor reaches the specified upper limit speed, and the motor is stopped, The rotor is rotated by wind.

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