JP4550459B2 - Generator with rotation speed increasing function - Google Patents

Description

  The present invention relates to a generator with a rotation acceleration function and an electric motor with a rotation deceleration function.

  For example, in a propeller-type wind turbine generator, a speed increaser is provided separately from the impeller and the power generation unit in order to increase the rotation of the propeller and transmit it to the power generation unit.

  However, if a gearbox is provided separately from the power generation unit, there is a problem that a large space must be secured in consideration of the installation of the gearbox, and the speedometer and power generation unit are separately installed on the rotating shaft. There is a problem in that there is a risk of deviation.

  In addition, there is no gearbox that controls the power generation speed. To control the power generation speed, the speed must be controlled by controlling the speed of the impeller. There is also a problem that control cannot be realized easily.

  In view of the above-described problems, the present invention can increase the speed in a space-saving manner, does not cause a deviation of the rotating shaft, and can increase the speed of power generation with high responsiveness. It is an object to provide a generator with a function.

  Further, the present invention can reduce the speed of the electric motor considered as a pair with the generator in a space-saving manner, does not cause a deviation of the rotating shaft, and can control the electric rotation speed with high responsiveness. It is also an object to provide an electric motor with a deceleration function.

  The above-described problem is that a pair of power generation rotors are provided and are configured to generate power by their relative rotation, and transmit a rotation of one rotor as a rotation in the opposite direction of the other rotor. This is solved by a generator with a rotation speed increasing function, characterized in that both rotors rotate in the opposite directions and generate electricity with the rotational force input to one of the rotors. (First invention).

  In this generator, when rotation is input to one rotor and the rotor rotates absolutely, the other rotor rotates in the opposite direction through the transmission mechanism, thereby increasing the speed, A power generation rotational speed higher than the rotational speed of the rotor can be obtained. Thus, since the generator of the present invention has a speed increasing function in the generator itself by using a rotor as a conventional stator, speed increase can be realized in a space-saving manner, There is no possibility that the rotation axis is displaced due to the addition of the speed increasing means.

  The above generator uses, for example, a planetary gear mechanism as a transmission mechanism, an internal gear is provided on one rotor, a sun gear is provided on the other rotor, and the planetary gear is engaged with both gears. By adopting a structure (second invention) in which the rotation of one of the rotors causes the other rotor to rotate in reverse, the speed increase can be realized practically.

  In particular, the planetary gear mechanism includes a drive unit that actively revolves the planetary gear around the sun gear, and a control unit that controls the active revolving operation of the planetary gear by the drive unit (first operation). 3 invention), by making the planetary gear perform an active revolving operation under the control of the control unit, the rotational speed of the other rotor that is not the input side can be changed, and the rotational speed of the rotor on the input side can be changed. Even if it is not possible to change freely, it is possible to realize power generation rotational speed control with good responsiveness.

  In addition, the above-described problem is that a pair of electric rotors are provided and are electrically driven by their relative rotation, and the transmission of transmitting the rotation of one of the rotors as the rotation in the opposite direction of the other rotor. With a speed reduction function, which is equipped with a mechanism, and when the power is input, both rotors rotate in the opposite directions and the rotation of one or both rotors is output. This is solved by the electric motor (fourth invention).

  In this electric motor, when one rotor makes an absolute rotation due to power input, the other rotor makes an absolute rotation in the opposite direction through the transmission mechanism, thereby decelerating. As described above, the electric motor according to the present invention has a speed reduction function in the motor itself by using a rotor as a rotor in the past. There is no risk of misalignment of the rotating shaft.

  The above-mentioned electric motor uses, for example, a planetary gear mechanism as a transmission mechanism, an internal gear is provided on one rotor, a sun gear is provided on the other rotor, and the planetary gear is installed in mesh with both gears. By adopting a structure (the fifth invention) in which the other rotor is rotated in the reverse direction by the rotation of one of the rotors, the deceleration can be realized practically.

  In particular, the planetary gear mechanism includes a drive unit that actively revolves the planetary gear around the sun gear, and a control unit that controls the active revolving operation of the planetary gear by the drive unit (first operation). In the sixth aspect of the invention, by making the planetary gear perform an active revolving operation under the control of the control unit, it is possible to realize the electric rotational speed control with good responsiveness.

  Since the generator according to the present invention is as described above, the speed can be increased in a small space, there is no possibility of causing a shift of the rotating shaft, and the power generation speed can be controlled with good responsiveness. it can. Further, the electric motor of the present invention can be decelerated in a space-saving manner, there is no possibility of causing a deviation of the rotating shaft, and the electric rotational speed can be controlled with good responsiveness.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The embodiment shown in FIGS. 1 and 2 is applied to a generator used for wind power generation. In FIG. 1, 1 is a generator with a rotation speed increasing function, and 2 is a propeller-type impeller. The rotation of the impeller 2 is transmitted to the generator 1 by the shaft 3.

  In the generator 1, an outer rotor 5 for power generation is rotatably supported by a roller 6, etc. in a sheath tube 4 as a base, and an inner rotor 7 for power generation is also rotated in a coaxial state inside the outer rotor 5. Arranged freely, the inner rotor 7 is connected to the rotating shaft 3 of the impeller 2 without using a conventional speed increaser.

  The generator 1 is provided with a transmission mechanism 8 that transmits the rotation of the inner rotor 7 as the rotation of the outer rotor in the reverse direction. The transmission mechanism 8 includes a planetary gear mechanism, and the planetary gear mechanism 8 is incorporated in the outer rotor 5 so as to be adjacent to the inner rotor 7. That is, an internal gear 9 is provided on the inner peripheral portion of the outer rotor 5, a sun gear 10 is connected to the inner rotor 7, and the planetary gears 11 are arranged in mesh with both the gears 9, 10, The outer rotor 5 is rotated in the opposite direction to the inner rotor 7 by the rotation of the rotor 7.

  In this embodiment, the planetary gears 11 are further provided with planetary gear holders 12 that hold the planetary gears 11 in a rotatable manner so that their relative positional relationship is kept constant. 11 is provided with a drive unit 13 that actively revolves around the sun gear 10 and a control unit 14 that controls the active revolving operation of the planetary gears 11 by the drive unit 13. The gear 11 can be actively revolved instead of following revolving.

  In the generator 1 described above, when the inner rotor 7 rotates absolutely by the rotation of the windmill 2, the outer rotor 5 rotates in the opposite direction through the planetary gear mechanism 8, thereby increasing the speed. A power generation rotational speed higher than the rotational speed of the impeller 2 can be obtained. In this way, in the generator 1 described above, since the generator 1 itself has a speed increasing function by using a rotor as a rotor, speed increase can be realized in a space-saving manner. Further, there is no possibility that the rotational shaft is displaced due to the addition of the speed increasing means.

  In particular, in this embodiment, the planetary gear mechanism 8 is employed as the transmission mechanism, and the planetary gears 11 can be actively revolved around the sun gear 10 by the control unit 14 and the drive unit 13. Therefore, even if the rotational speed of the impeller 2 is not changed, the rotational speed of the power generation can be controlled by changing the rotational speed of the outer rotor 5, and it is used for the active revolution of the planetary gear 11. Since the operation is performed by operation, it is possible to realize the power generation rotational speed control that is very excellent in responsiveness compared to the case of controlling the rotational speed of the impeller 2.

  Specifically, as shown in FIG. 2 (a), as shown in FIG. 2 (b), the planetary gears 11 are prevented from revolving or the planetary gears 11 are made to follow and revolve as shown in FIG. When the planetary gears 11 are actively revolved in one direction, even if the change in the rotation speed of the inner rotor 7 is slow, the rotation speed of the outer rotor 5 can be increased to increase the power generation rotation speed. As shown in FIG. 2C, when the planetary gears 11 are actively revolved in the opposite direction, the rotation of the outer rotor 5 is slowed down even if the change in the rotational speed of the inner rotor 7 is slow. The number of rotations can be lowered.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the case where the rotating shaft 3 of the windmill impeller 2 is connected to the inner rotor is shown, but the rotating shaft 3 of the windmill impeller 2 may be connected to the outer rotor side. Good. In the above embodiment, the case where one rotor is an outer rotor and the other rotor is an inner rotor is shown, but the present invention is not limited to an outer / inner rotor.

  In the above embodiment, the planetary gear mechanism 8 is used as the transmission mechanism. However, the present invention is not limited to this, and a mechanism that transmits the rotation of one of the rotors as the rotation of the other rotor in the reverse direction. If it is provided.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to a generator for wind power generation is shown. However, the generator may be used as another generator, and the generator with the speed increasing function may be configured as described above. You may use it as an electric motor with a speed reduction mechanism in the same manner.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a generator with a speed increasing mechanism according to an embodiment, in which FIG. FIGS. 1A to 1C are cross-sectional rear views each showing an operating state related to the rotational speed control of the generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Generator with speed increasing function 5 ... Outer rotor 7 ... Inner rotor 8 ... Planetary gear mechanism (transmission mechanism)
9 ... Internal gear 10 ... Sun gear 11 ... Planetary gear 13 ... Drive unit 14 ... Control unit

Claims (1)

  An outer rotor for power generation is rotatably supported, and an inner rotor for power generation is rotatably arranged in the outer rotor, and the rotating shaft of the impeller is connected to the inner rotor. ,
  A planetary gear mechanism is provided in the outer rotor so as to be adjacent to the inner rotor on the side opposite to the side with the impeller, and an inner gear is provided on the inner peripheral portion of the outer rotor. The sun gear is connected, the planetary gear is arranged in mesh with both the sun and internal gears, and the outer rotor rotates in the opposite direction to the inner rotor by the rotation of the inner rotor.
  A drive unit that actively revolves the planetary gear around the sun gear is provided on the side opposite to the inner rotor across the planetary gear mechanism, and controls the active revolving operation of the planetary gear by the drive unit. A generator with a rotation speed increasing function for wind power generation, comprising a control unit.

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