JPH10267076A - Energy recovery type active damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the total electric power required for operation and execute long operation by storage battery, by supplying electric power to an electric motor through the storage battery, and recovering energy produced by the electric motor, in association with damping, to the storage battery. SOLUTION: In this damping device 10, additional mass 1 is driven by an electric motor 2, and guided by a linear guide 3 fixed to a building so as to be vibrated horizontally. The vibration of the building is detected by a vibration sensor 4. Further, a supporting spring 5 is attached in parallel to the electric motor 2 to the applied mass 1. A controller 6 inputs the detected output of the vibration sensor 4, transmits a control command signal 8 to an electric motor amplifier 7, then makes the electric motor 2 to produce the motion of the additional mass 1 having phase that suppresses the natural frequency of the building. While, an energy recovering device 30 receives energy 11 developed by reverse action that the electric motor 2 receives from the additional mass 1 during a speed reducing period, and converts energy 11 into a form that storage battery 20 can receive, and sends the energy 11 to the storage battery 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active vibration damping device for actively suppressing vibrations of structures and equipment generated by disturbances such as wind and earthquake.

[0002]

2. Description of the Related Art Active vibration damping devices for suppressing vibrations of structures and equipment are used to prevent the vibration of high-rise buildings, to control the inclination and vibration of vehicles, to prevent elevated roads, forging machines, machine tools, and hand-held tools. It is used in many fields such as vibration. The active vibration damping device has an automatic control system, in which the additional mass supported by the linear guide is driven by an actuator such as a motor connected in parallel with the spring, and a sinusoidal waveform synchronized with the natural frequency of the structure is driven. Damping is performed by repeatedly performing deceleration movement. As described above, the active vibration damping device aims at stopping vibration by applying energy from the outside, so that the supplied energy is increased instead of having a large vibration damping effect.

An active vibration damping device using an electric motor as an actuator does not function when a power failure occurs due to an earthquake or the like, and as a countermeasure against this, Japanese Patent Application Laid-Open No. 8-128227 discloses a vibration damping device using a storage battery as a power supply. A vibration damping device using a storage battery as a power source is capable of continuously supplying power consumed during operation from the outside through a storage battery during normal operation, and using the energy of the storage battery during a power outage to continue the vibration suppression operation. . Therefore, a large amount of electric power is consumed, and a large-capacity storage battery is required in case of emergency.

[0004]

However, in the acceleration / deceleration motion when the active vibration damping device operates, energy is consumed to accelerate against the movement direction of the structure or the like at the time of acceleration. Generate energy to brake such movements. Conventionally, in a vibration damping device using an electric motor, energy generated during deceleration due to braking has been consumed as heat by a resistor connected to a terminal. The problem to be solved by the present invention is to reduce the total power required for operation by collecting and reusing energy generated by braking, and to provide an active vibration damping device capable of operating for a long time with a storage battery. It is to provide.

[0005]

In order to solve the above-mentioned problems, an energy recovery type active vibration damping device according to the present invention is configured so that an additional mass supported by a linear guide is driven by a spring and an electric motor to dampen the vibration. Is characterized by comprising a storage battery and an energy recovery device, supplying electric power to the motor via the storage battery, and recovering energy generated in the motor due to braking into the storage battery via the energy recovery device. Note that the energy recovery device may be a rectifier.

According to the energy recovery type active vibration damping device of the present invention, since the electric power is supplied via the storage battery, the vibration damping device can be operated even during a power outage to suppress the vibration. Also, the energy generated during the braking period, which occupies almost half the time in the accelerating and decelerating movements during operation, is converted into electric power by electromechanical conversion with an electric motor, converted into a form that can be recovered by a storage battery with an energy recovery device, and reused. The total power required for the operation of the vibration damping device is reduced, energy can be saved, and the capacity of the storage battery for emergency power failure can be reduced. Even if a storage battery of the same capacity is used, the power consumption of the storage battery is suppressed, so that a long-time independent operation can be performed even in the event of an emergency power failure. If the rectifier is an energy recovery device,
Since energy can be recovered by a simple and small device, the economic effect is large.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An energy recovery type active vibration damping device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the energy recovery type active vibration damping device of the present invention. The energy recovery type active vibration damping device of the present embodiment is obtained by adding a storage battery 20 and an energy recovery device 30 to a conventional active vibration damping device 10 using an electric motor. The active vibration damping device 10 includes an additional mass 1, a motor 2, a linear guide 3, a vibration sensor 4, a spring 5, a control device 6, and a motor amplifier 7.

[0008] The active vibration damping device 10 imparts a motion-controllable additional mass 1 to a structure to be damped, and is shifted in phase with respect to a natural vibration of the structure caused by a disturbance such as an earthquake. By causing the movement of the additional mass 1, vibration of the structure is suppressed. The additional mass 1 is driven by an electric motor 2 and guided by a linear guide 3 fixed to a structure (not shown) to vibrate in the horizontal direction. The vibration of the structure is detected by the vibration sensor 4. Note that a supporting spring 5 is attached to the additional mass 1 in parallel with the electric motor 2. The control device 6 receives the detection output of the vibration sensor 4 and transmits a control command signal 8 for causing the motor 2 to move according to the natural vibration of the structure to the motor amplifier 7. The motor amplifier 7 supplies energy to the motor 2 to
Drive.

[0009] The storage battery 20 supplies power to the control device 6 for operating the device. Further, a power source is further supplied to the motor amplifier 7. Since the storage battery 20 supplies a DC power supply, when the motor 2 is of an AC drive type, the motor 2 is driven by a DC / AC converter, for example, an AC drive power supply having a built-in inverter in the motor amplifier 7. The inverter may be provided separately instead of being built in. Electric power 12 is supplied to storage battery 20 from an external power supply. Normally, the supplied electric power 12 can supplement the electric energy required for the active vibration damping device 10. The active vibration damping device 10 analyzes the vibration of the structure to generate a motion of the additional mass 1 having a phase for suppressing the natural vibration. For this reason, the structure is accelerated or decelerated. However, during acceleration, energy is consumed to accelerate against the movement of the structure, and energy is received from the structure during deceleration. Therefore, almost half of the total time is a deceleration period for receiving energy.

The energy recovery device 30 receives the energy 11 generated by the reverse action that the electric motor 2 receives from the additional mass 1 during the deceleration period, converts the energy 11 into a form that can be accepted by the storage battery 20, and sends it to the storage battery 20. When the AC motor 2 is used, the energy generated when braking the movement of the structure takes the form of an AC current. Therefore, an AC / DC current converter, that is, a rectifier can be used as the energy recovery device 30. Even when a DC motor is used, the kinetic energy released from the rotating body can be sent back to the power supply as regenerative power by operating the generator during braking.

[0011]

As described above in detail, when the energy recovery type active vibration damping device of the present embodiment is used, if a power failure occurs due to a severe earthquake or the like, even if the supply of the power 12 is cut off, The operation of the active vibration damping device 10 is performed only by the power supply from the storage battery 20. In this case, the power consumption of the active vibration damping device as a whole is smaller than that of the conventional device, so that long-term operation is possible and the capacity of the storage battery may be small.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of an energy recovery type active vibration damping device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Additional mass 2 Motor 3 Linear guide 4 Vibration sensor 10 Active vibration suppression device 20 Storage battery 30 Energy recovery device

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshikazu Nishi 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside Akashi Plant (72) Inventor Yukinobu Kawano 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd.

Claims (2)

[Claims] 1. An active vibration damping device for driving an additional mass supported by a linear guide by a spring and an electric motor to dampen the vibration, comprising a storage battery and an energy recovery device, and supplying electric power to the motor via the storage battery. An energy recovery type active vibration damping device, wherein energy generated by the electric motor due to braking is recovered to the storage battery via the energy recovery device. 2. The energy recovery type active vibration damping device according to claim 1, wherein said energy recovery device is a rectifier.