JPH02157483A - wind power generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to the improvement of a wind power generation device that generates electricity using the power of the wind, and in which the generator is always rotated at a constant speed regardless of changes in wind speed. This will enable more efficient power generation.

(Conventional technology) In order to secure electricity in places where it is difficult to run power lines, such as remote islands, mountainous areas, or desert areas, or places where strong winds are constantly blowing, such as coastal areas, the kinetic energy of the wind is used. Wind power generation devices that use wind power to generate electricity are being researched and are being implemented in some areas.

A wind power generator uses wind power to rotate a rotor, such as a propeller, and a generator is rotationally driven by a rotating shaft connected to the center of the rotor.

In the case of such a wind power generation device, when the wind speed changes, the rotation speed of the rotating shaft rotated by the rotor also changes, and the rotation speed of the generator changes accordingly, making sure that the voltage and frequency of the current extracted are appropriate. It goes out of range.

In this way, if the voltage or frequency of the current sent out from the generator deviates from the appropriate range, it may cause malfunction or failure of various electrical devices to which power is transmitted from the generator.

For this reason, conventionally, as disclosed in Japanese Patent Laid-Open No. 57-208849, the electrical circuit for extracting electricity from the generator has been changed according to the rotation speed of the rotor, or As disclosed in Japanese Patent No. 61-112780, the pitch of the rotor blades can be changed according to the wind speed, so that the generator is always rotated within a constant speed range regardless of changes in the wind speed.

(Problem to be Solved by the Invention) In the case of conventional wind power generators such as those mentioned above, the ζ roller has a structure that allows obtaining a constant range of voltage and frequency regardless of changes in wind speed. Not only does this increase complexity and increase the manufacturing cost of the wind power generation device, but it also does not necessarily provide good response when the wind speed changes drastically, and when the wind speed changes suddenly, it can sometimes fall within the acceptable range. There were cases in which voltages and frequencies that were outside the range were sent out.

The wind power generation device of the present invention solves the above-mentioned disadvantages.

(Means for Solving the Problems) The wind power generation device of the present invention includes a rotor that rotates by receiving wind, a continuously variable transmission that connects the rotor to the end of a human power shaft, and a continuously variable transmission that connects the rotor to the end of a human power shaft. It is composed of a generator rotationally driven by an output shaft, a rotation sensor that detects the rotation speed of the input shaft, and a controller that changes the gear ratio of the continuously variable transmission based on a signal sent from the rotation sensor. ing.

The controller adjusts the speed ratio so as to maintain the rotation speed of the output shaft within a certain range regardless of changes in the rotation speed of the input shaft.

(Function) In the case of the wind power generator of the present invention configured as described above, even if the rotational speed of the input shaft connected to the rotor changes due to a change in wind speed, the controller Since this changes the gear ratio of the continuously variable transmission, the rotational speed of the generator caused by the output shaft is always within a certain range, and the voltage and frequency of the current sent out from this generator will not fluctuate greatly.

(Example) Next, the present invention will be explained in more detail while explaining the illustrated embodiment.

In the drawing, 1 is a propeller-type rotor that rotates due to the wind, 2 is a toroidal-type continuously variable transmission, and this rotor 1
The center of the input shaft 3 of the continuously variable transmission 2 is coupled directly or via a suitable power transmission mechanism. The toroidal continuously variable transmission 2 has an input side concave surface 10 formed on a part fixed to the input shaft 3, and an output side concave surface 13 formed on a part fixed to a gear 12 that meshes with a gear 11 fixed to the output shaft 4. The gear ratio between the human power shaft 3 and the output shaft 4 is changed by changing the inclination angle of the shaft 15 that pivots the rolling pJ14 that is in close contact with the continuously variable transmission 2 itself. Since this has been known for a long time, detailed explanation will be omitted.

On the other hand, the output shaft 4 of the continuously variable transmission 2 is coupled to the input shaft of the generator 5, and as a result of the rotation of the output shaft 4, the generator 5
It is designed to rotate.

Reference numeral 6 denotes a first rotation sensor provided near the input shaft 3 or near the power transmission mechanism between the input shaft 3 and the rotor 1, and the first rotation sensor 6 controls the continuously variable transmission. The number of revolutions on the input shaft 3 side of No. 2 can be freely detected.

Reference numeral 7 denotes a second rotation sensor provided near the output shaft 4 of the continuously variable transmission 2 or the input shaft of the generator 5. The rotation speed on the output shaft 4 side can be detected freely.

The signals representing the rotation speeds of the input @ 3 and output shaft 4 detected by the first and second rotation sensors 6.7 are transmitted to a controller for controlling the speed change control mechanism 8 of the continuously variable transmission 2. 9 is entered.

The controller 9 controls the speed change control mechanism 8 based on the signals sent from the two rotation sensors 6.7, and changes the speed ratio of the continuously variable transmission 2 by the control mechanism 8 (the speed change ratio of the continuously variable transmission 2). The gear ratio of the continuously variable transmission 2 is adjusted so that the rotational speed of the output shaft 4 is maintained within a substantially constant range regardless of the change in the rotational speed of the input '@3.

In the case of the wind power generator of the present invention configured as described above, even if the rotational speed of the input shaft 36 to which the rotor 1 is connected changes due to a change in wind speed, the controller 9 changes the speed change control mechanism 8 accordingly. This control mechanism 8 sends a signal to the continuously variable transmission 2.
Since the speed ratio of the generator 5 is changed, the rotation speed of the generator 5 caused by the output shaft 4 is always constant, and the voltage and frequency of the current sent out from the generator 5 do not fluctuate greatly.

That is, for example, when the wind speed is high (fast) and the rotation speed of the input shaft 3 coupled to the rotor 1 is high, the gear ratio of the continuously variable transmission 2 is increased (when the continuously variable transmission 2 decelerates, the speed ratio of the continuously variable transmission 2 is increased). (When the speed of the multi-stage transmission 2 increases, the gear ratio is made smaller.) Even though the input shaft 3 rotates at a high speed, the rotation speed of the output shaft 4 is prevented from becoming too high.

On the other hand, when the wind speed is small (slow), the rotor 1 causes the input shaft 3 to
When the rotation speed of the continuously variable transmission 2 is low, the gear ratio of the continuously variable transmission 2 is decreased (when the continuously variable transmission 2 decelerates. When the continuously variable transmission 2 speeds up, the gear ratio is increased). Input shaft 3
Even if the rotation speed of the output shaft 4 is low, the rotation speed of the output shaft 4 is made sufficient for power generation.

In the case of the above embodiment, not only the first rotation sensor 6 that detects the rotation speed of the input shaft 3 of the continuously variable transmission 2 but also the second rotation sensor 7 that detects the rotation speed of the output shaft 4 is used. However, the number of revolutions required for the output shaft 4 is within a certain range as mentioned above, and once the number of revolutions of the input shaft 3 is known, it is possible to keep the number of revolutions of the output shaft 4 within a certain range. Since a speed ratio of 1 is required, the second rotation sensor 7 can be omitted by storing a value representing this certain range in the controller 9 in advance. However, even in this case, if the second rotation sensor 7 is provided, it can be confirmed whether the control by the controller 9 is being performed properly.

Moreover, as the continuously variable transmission 2, the illustrated toroidal type (CV
In addition to T), continuously variable transmissions of various conventionally known structures such as belt pulley type and Taber roller type can be used.

(Effects of the Invention) Since the wind power generation device of the present invention is configured and operates as described above, it is possible to create a wind power generation device with a relatively simple structure that can keep the voltage and frequency within a certain range regardless of changes in wind speed. It can be manufactured at low cost, and even when the wind speed changes rapidly,
It can quickly follow this and suppress temporal rises and drops in voltage and frequency.

[Brief explanation of the drawing]

The drawing is a schematic side view showing an embodiment of the invention. 1: Rotor, 2: Continuously variable transmission, 3: Input shaft, 4: Output shaft, 5: Generator, 6: First rotation sensor, 7: Second rotation sensor, 8: Speed change control mechanism, 9: Controller, 10: Input side concave surface, 11,! 2: gear, 13: output side concave surface, 14: transfer ring, 15: shaft.

Claims (2)

[Claims] (1) A rotor that rotates when receiving wind, a continuously variable transmission that connects this rotor to the end of an input shaft, a generator that is rotationally driven by the output shaft of this continuously variable transmission, and a generator that rotates by the output shaft of the continuously variable transmission. It consists of a rotation sensor that detects the rotation speed, and a controller that changes the gear ratio of the continuously variable transmission based on the signal sent from the rotation sensor. A wind power generator that adjusts the gear ratio so as to maintain the rotational speed of the shaft within a certain range. (2) In addition to the rotation sensor that detects the rotation speed of the input shaft, a second rotation sensor that detects the rotation speed of the output shaft is provided, and the signal representing the rotation speed of the output shaft detected by the second rotation sensor is provided. The wind power generator according to claim 1, wherein the input shaft is inputted to the controller together with a signal representing the rotation speed of the input shaft.