JP2010180032A - Elevator vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator vibration control device capable of inexpensively exciting and driving a pair of electromagnets. <P>SOLUTION: A rectification circuit 47a for blocking a normal component of a vibration control signal and applying only a reverse component to an electromagnet 26a is provided between the electromagnet 26a and an amplifier 46. A rectification circuit 47b such as a diode for blocking the reverse component of the vibration control signal and applying only the normal component to the electromagnet 26b is provided between the electromagnet 26b and the amplifier 46. Thereby, a control device 40 can excite and drive the electromagnets 26a, 26b alternately only by outputting an alternating current. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator vibration control device for reducing vibration of an elevator.

  In recent years, with the space saving of buildings, elevators of a machine room-less type in which a hoisting machine is downsized and installed in a hoistway have become widespread. In a machine roomless type elevator, a car is moved up and down via a rope wound around a sheave of the hoisting machine when the hoisting machine is driven in the hoistway. At this time, the vibration of the hoisting machine is transmitted to the building side through a beam or the like. In particular, when the diameter of the sheave is reduced by improving the strength of the rope, the diameter of the sheave is reduced accordingly, and the sheave rotates at a high speed to generate vibration of about 10 Hz or more. This vibration causes noise on the wall of the house on the building side. From such a background, a vibration damping device is installed together with the vibration sensor on the support member that supports the hoisting machine, and the vibration detected by the vibration sensor by driving the vibration damping device is used as the vibration damping force. There has been proposed a technique for reducing vibrations transmitted to a building via a support member by giving the support member (see Patent Document 1).

JP 2007-297180 A

  A conventional vibration damping device includes a casing attached to a support member, an elastic body that supports a weight having a magnetic body at least partially within the casing so as to be displaceable in a vibration damping direction (for example, up and down direction), and a magnetic body within the casing. A pair of electromagnets arranged opposite to the body, and applying a damping force to the support member via the casing by vibrating the weight in a damping direction by the action of the electromagnetic force generated by the pair of electromagnets on the magnetic body It is configured as follows. However, each of the pair of electromagnets can only generate an electromagnetic force in the direction of attracting the magnetic material. Therefore, in the conventional vibration damping device, when the weight is moved in one direction, the suction action by the electromagnetic force of one electromagnet is increased and the suction action by the electromagnetic force of the other electromagnet is reduced. In response to this, the electromagnetic force of the electromagnet was individually excited and driven. However, according to such a configuration, a D / A converter that D / A converts the control signal of the electromagnet and an amplifier that amplifies and outputs the control signal must be prepared for each electromagnet. Difficult to compose.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an elevator vibration damping device capable of exciting and driving a pair of electromagnets at a low cost. Another object of the present invention is to provide an elevator vibration control device capable of applying a vibration control force by one electromagnet and a control unit.

  An elevator vibration damping device according to a first aspect of the present invention includes a casing attached to a vibration damping object, and an elastic body that supports a weight having a magnetic body at least partially in the casing so as to be displaceable in a vibration damping direction. A pair of electromagnets arranged opposite to each other in the casing, a controller for supplying an alternating current to the pair of electromagnets, and a positive current of the alternating current connected between the controller and one of the pair of electromagnets And a second rectifier circuit that is connected between the control unit and the other electromagnet of the pair of electromagnets and energizes only the reverse current of the alternating current.

  An elevator vibration damping device according to a second aspect of the present invention includes a casing attached to a vibration damping object, and an elastic body that supports a weight having a magnetic body at least partially in the casing so as to be displaceable in a vibration damping direction. A pair of electromagnets disposed opposite to the magnetic body in the casing; a control unit that supplies an alternating current to the pair of electromagnets; a first current line that connects the control unit and one of the pair of electromagnets; And a second current line connecting the other electromagnet of the pair and the pair of electromagnets, and between the control unit and the first and second current lines, and between the first current line and the second current line A current switching circuit for switching a current line for supplying an alternating current.

  An elevator vibration damping device according to a third aspect of the present invention includes a casing that is attached to a vibration damping object, an elastic body that supports the weight so as to be displaceable in the vibration damping direction, and is disposed on the weight. A magnetic field generation unit that permanently generates a fixed magnetic field in the vibration suppression direction, an electromagnet disposed opposite to the magnetic field generation unit in the casing, and a control unit that supplies an alternating current to the electromagnet.

  According to the elevator vibration control device of the present invention, a pair of electromagnets can be excited and driven at low cost. Further, according to the elevator vibration control device of the present invention, the vibration control force can be applied by one electromagnet and the control unit.

It is a figure which shows the structure of the machine roomless type elevator used as embodiment of this invention. It is a figure which shows the internal structure of the damping device shown in FIG. It is a figure for demonstrating the structure of the control system of the damping device shown in FIG. It is a figure for demonstrating the structure of the control system of the damping device used as the 2nd Embodiment of this invention. It is a figure which shows the internal structure of the damping device used as the 3rd Embodiment of this invention. It is a figure for demonstrating the structure of the control system of the damping device used as the 3rd Embodiment of this invention.

  The machine room-less type elevator configuration is such that, for example, a control panel or a hoisting machine is arranged on a wall or rail in a hoistway instead of a conventional machine room as disclosed in Japanese Patent Application Laid-Open No. 2004-115161. ing. These rails and the like are fixed to the inner wall of the hoistway by brackets and the like, and vibrations generated by driving the hoisting machine and raising and lowering the car are transmitted to the building, causing noise and the like. Hereinafter, a configuration of a machine roomless type elevator to which an elevator vibration control device according to the present invention is applied will be described with reference to the drawings.

[First Embodiment]
[Overall configuration of elevator]
First, the overall configuration of a machine roomless elevator according to the first embodiment of the present invention will be described with reference to FIG.

  In the machine roomless type elevator according to the first embodiment of the present invention, as shown in FIG. 1, the equipment (including a control panel (not shown)) such as the hoisting machine 11 is downsized and the hoistway 10 is Is arranged. The hoisting machine 11 is installed on a support member 12 installed in the horizontal direction above the hoistway 10 via a receiving base 13. The support member 12 is made of, for example, a strong iron member (a building beam can be used). The cradle 13 attached to the bottom of the hoisting machine 11 is made of a sound absorbing member such as a vibration-proof rubber. A main sheave 14 is rotatably attached to a rotating shaft 11 a of the hoisting machine 11, and a rope 15 is wound around the main sheave 14.

  Both ends of the rope 15 are fixed to hitch portions provided at predetermined positions of the hoistway 10, and the car 16 is supported by a 2: 1 roping method together with counterweights (not shown) via car lower sheaves 17a and 17b. It has been. Although only one rope 15 is shown in FIG. 1, in reality, a plurality of ropes 15 are wound around the main sheave 14, the car lower sheaves 17a, 17b, and the like. The car 16 is slidably supported by the pair of guide rails 18 a and 18 b and moves up and down via the rope 15 in accordance with the driving of the hoisting machine 11. The guide rails 18a and 18b are connected to the support member 12, and the end of the support member 12 is fixed to the side wall 19 of the building.

  In the machine roomless type elevator having such a configuration, vibration is generated as the hoisting machine 11 is driven, and the vibration is transmitted around the hoisting machine 11. In particular, when the diameter of the rope 15 is reduced by improving the strength of the rope 15, the diameter of the main sheave 14 is reduced accordingly. This vibration is transmitted to the side wall 19 of the building through the support member 12 and causes noise, for example, on the wall of a residence. Therefore, in this machine roomless type elevator, a vibration sensor 20 and a damping device 21 are provided on the support member 12 in order to reduce vibration transmitted from the hoisting machine 11 to the side wall 19 of the building.

  The vibration sensor 20 is composed of, for example, an acceleration sensor, and detects vibration generated at the installation location. The vibration damping device 21 applies a vibration damping force to the vibration damping target (the support member 12 in this example) by moving the weight 22 in a predetermined direction based on the vibration signal detected by the vibration sensor 20. More specifically, the vibration damping device 21 is provided together with the vibration sensor 20 on the back side of the support member 12 (that is, the surface opposite to the hoisting machine 11). The vibration transmitted to the support member 12 when the hoisting machine 11 is driven is detected by a vibration sensor 20 provided on the support member 12. The vibration damping device 21 generates a force having a phase opposite to that of the vibration transmitted to the support member 12 by moving the internal weight 22 based on the vibration signal detected by the vibration sensor 20. As a result, a damping force is applied to the support member 12 and the vibration from the hoisting machine 11 is offset. As a result, vibration transmitted from the hoisting machine 11 to the side wall 19 of the building via the support member 12 can be reduced.

[Internal configuration of vibration control device]
Next, the internal configuration of the vibration damping device 21 according to the first embodiment of the present invention will be described with reference to FIG.

  The vibration damping device 21 includes a casing 24 that forms a space 23 that accommodates a weight 22 having at least a part of a magnetic body therein, a recess 25 formed in a bottom surface 24 a inside the casing 24, and a weight 22. 24. Electromagnets 26a and 26b arranged opposite to the upper surface on the inner side 24 and the bottom surface 25a of the recess 25, and the bottom surface 24a on the inner side of the casing 24, and the weight 22 in the direction of arrows a and b in the figure (damping direction, vertical direction) ) Are provided with elastic bodies 27a and 27b that are movably supported. In the vibration damping device 21, when the electromagnets 26 a and 26 b are excited, the weight 22 having at least a part of the magnetic material is moved in the vibration damping direction by the electromagnetic force generated at that time, and the reaction force acts on the casing 24. . Therefore, if the electromagnets 26a and 26b are subjected to excitation control so that the reaction force acting on the casing 24 becomes a damping force, the vibration from the hoisting machine 11 can be offset.

  The casing 24 only needs to have upper and lower surfaces on which the electromagnets 26a and 26 are provided, and does not necessarily have four side surfaces. Further, the electromagnets 26a and 26b are positions corresponding to nodes (points that do not displace during vibration) of the rotation system of the vibration system constituted by the weight 22 and the elastic bodies 27a and 27b (the weight 22 when there are two elastic bodies). It is desirable to arrange at the center of gravity position. According to such a configuration, it is possible to prevent the damping force from being accurately controlled by exciting the secondary vibration mode of the weight 22 (for example, swinging rotation about the center of gravity of the weight 22).

  The cores constituting the electromagnets 26a and 26b are preferably formed of a material having a relatively large electrical resistance, such as laminated steel sheets, ferrite, and permalloy. This is because, when the core is formed of a material having a relatively small electrical resistance such as iron, when a high frequency current is applied to the coil, an eddy current is generated on the surface of the core, so that the generated electromagnetic force is generated in the electromagnets 26a and 26b. This is because there is a possibility that the vibration damping force cannot be accurately controlled.

[Control system configuration of vibration control device]
Next, the configuration of the control system according to the first embodiment of the present invention for controlling the operation of the vibration damping device 21 will be described with reference to FIG.

  The control device 40 is configured by a general-purpose computer such as a DSP (Digital Signal Processor), and includes an A / D converter 41, a high-pass filter 42, an integrator 43, a gain adjuster 44, and a D / A converter 45. The vibration signal detected by the vibration sensor 20 is A / D converted by the A / D converter 41 and then given to the high-pass filter 42, and the vibration component in the frequency range (for example, about 50 to 300 Hz) suppressed by the high-pass filter 42. Is extracted. The vibration component extracted by the high pass filter 42 is numerically integrated by the integrator 43 and then multiplied by a predetermined gain by the gain adjuster 44 to generate a vibration suppression signal. The damping signal is D / A converted by a D / A converter 45 and amplified by an amplifier (AMP) 46. Between the electromagnet 26a and the amplifier 46, there is provided a rectifier circuit 47a such as a diode for blocking the forward direction component of the damping signal and energizing only the reverse direction component to the electromagnet 26a, and between the electromagnet 26b and the amplifier 46. There is provided a rectifier circuit 47b such as a diode that blocks the reverse direction component of the vibration signal and energizes only the positive direction component to the electromagnet 26b. Thereby, when the positive direction component of the vibration suppression signal is amplified and output from the amplifier 46, the electromagnet 26b is driven to be excited, the weight 22 is attracted in the direction b shown in FIG. 1, and the casing 24 itself vibrates due to the reaction. Similarly, when the backward component of the vibration suppression signal is amplified and output from the amplifier 46, the electromagnet 26a is driven to be excited, the weight 22 is attracted in the direction a shown in FIG. Vibrate.

  As is apparent from the above description, according to the machine roomless type elevator according to the first embodiment of the present invention, the forward direction component of the damping signal is cut off between the electromagnet 26a and the amplifier 46, and vice versa. A rectifier circuit 47a for energizing only the directional component to the electromagnet 26a is provided. Between the electromagnet 26b and the amplifier 46, the reverse direction component of the damping signal is cut off, and a rectifier such as a diode that energizes only the positive direction component to the electromagnet 26b. Since the circuit 47b is provided, the control device 40 can drive the electromagnets 26a and 26b alternately by simply outputting an alternating current. Therefore, according to the machine roomless type elevator which is the first embodiment of the present invention, the D / A converter and the damping signal for D / A converting the damping signal are provided as in the conventional damping device. There is no need to prepare an amplifier for amplification output for each electromagnet, and the vibration damping device can be configured at low cost.

[Second Embodiment]
Next, the configuration of a machine roomless type elevator according to the second embodiment of the present invention will be described. Note that this embodiment is different from that of the first embodiment only in the configuration of the control system, and therefore only the configuration of the control system will be described below with reference to FIG.

  In the present embodiment, the control device 40 is configured by a general-purpose computer such as a DSP, and as shown in FIG. 4, an A / D converter 41, a high-pass filter 42, an integrator 43, a gain adjuster 44, a D / A A converter 45, a route calculator 50, and a switching signal generator 51 are provided. In addition, switching circuits 53a and 53b such as an inverter driven by the switching signal generator 51 are provided on the current lines 52a and 52b connecting the amplifier 46 and the electromagnets 26a and 26b. In this control system, the vibration signal detected by the vibration sensor 20 is A / D converted by the A / D converter 41 and then applied to the high-pass filter 42, and the vibration component in the frequency range suppressed by the high-pass filter 42 is extracted. Is done. The vibration component extracted by the high pass filter 42 is numerically integrated by the integrator 43 and then multiplied by a predetermined gain by the gain adjuster 44 to generate a vibration suppression signal. The damping signal is D / A converted by the D / A converter 45 and amplified by the amplifier 46. The switching signal generator 50 turns the switching circuits 53a and 53b on and off, respectively, when the backward component of the damping signal is amplified and output from the amplifier 46. As a result, the electromagnet 26a is excited and driven, the weight 22 is attracted in the direction a shown in FIG. 1, and the casing 24 itself vibrates due to the reaction. On the other hand, when the positive direction component of the damping signal is amplified and output from the amplifier 46, the switching signal generator 50 turns off and on the switching circuits 53a and 53b, respectively. As a result, the electromagnet 26b is excited and the weight 22 is attracted in the direction b shown in FIG. 1, and the casing 24 itself vibrates due to the reaction.

  When the electromagnet to be energized is switched by a passive element such as a diode as in the first embodiment, distortion of the voltage waveform due to the characteristics of the diode occurs, an unexpected load is applied to the amplifier 46 side, etc. Unexpected adverse effects may occur. In this embodiment, since the switching of the electromagnet to be energized is actively performed using the switching circuits 53a and 53b that are faster than the frequency of the current, it is possible to suppress an unexpected adverse effect.

[Third Embodiment]
Finally, the configuration of a machine roomless type elevator according to the third embodiment of the present invention will be described.

  In the present embodiment, as shown in FIG. 5, the vibration damping device 21 is fixed to a casing 24 that forms a space 23 in which a weight 22 having a magnetic material at least partially is housed, and an inner bottom surface of the casing 24. The U-shaped electromagnet 26, L-shaped members 61a and 61b fixed to the inner side surface of the casing 24, and the L-shaped members 61a and 61b are arranged on the L-shaped members 61a and 61b. Elastic bodies 27a and 27b that are displaceably supported in the vibration direction and the vertical direction), a permanent magnet 62a provided on the bottom surface of the weight 22 facing the electromagnet 26, and a permanent magnetic field generator 62 composed of a U-shaped core 62b. Prepare. The permanent magnetic field generating unit 62 constantly generates N and S magnetic fields below the weight 22 when the magnetic flux of the permanent magnet 62a passes through the U-shaped core 62b in a concentrated manner. The electromagnet 26 generates a varying magnetic field at a position facing the U-shaped iron core 62b. According to such a vibration damping device 21, by exciting one electromagnet 26 with the amplifier 46 (see FIG. 6), it is possible to generate a force in both directions of an attractive force and a repulsive force between the electromagnet 26 and the weight 22. it can. Therefore, according to the present embodiment, since only one D / A converter for D / A converting the control signal of the electromagnet or an amplifier for amplifying and outputting the control signal is required, the vibration damping device can be configured at low cost. .

  As mentioned above, although embodiment which applied this invention was described, this invention is not limited with the description and drawing which make | form a part of indication of this invention by this embodiment. That is, other embodiments, examples, operational techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.

10: hoistway 11: hoisting machine 11a: rotating shaft 12: support member 13: cradle 14: main sheave 15: rope 16: car 17a, 17b: car sheaves 18a, 18b: guide rail 19: side wall of building 20: Vibration sensor 21: Damping device 22: Weight 23: Space 24: Casing 25: Recesses 26a, 26b: Electromagnets 27a, 27b: Elastic body 40: Control device 41: A / D converter 42: High-pass filter 43: Integration Unit 44: Gain adjuster 45: D / A converter 46: AMP
47a, 47b: Rectifier circuit

Claims (3)

A casing attached to the object to be controlled;
An elastic body that supports a weight having a magnetic body at least partially in the casing so as to be displaceable in the vibration damping direction;
A pair of electromagnets arranged opposite to each other in a weight in the casing;
A controller for supplying an alternating current to the pair of electromagnets;
A first rectifier circuit connected between the controller and one electromagnet of the pair of electromagnets and energizing only the positive current of the alternating current;
A second rectifier circuit connected between the control unit and the other electromagnet of the pair of electromagnets and energizing only a reverse current of the alternating current;
An elevator vibration control device that applies a vibration suppression force to a vibration suppression object through a casing by moving a weight in a vibration suppression direction by the action of the electromagnetic force of the pair of electromagnets on a magnetic body. A casing attached to the object to be controlled;
An elastic body that supports a weight having a magnetic body at least partially in the casing so as to be displaceable in a vibration damping direction;
A pair of electromagnets disposed opposite the magnetic body in the casing;
A controller for supplying an alternating current to the pair of electromagnets;
A first current line connecting the controller and one electromagnet of the pair of electromagnets;
A second current line connecting the control unit and the other electromagnet of the pair of electromagnets;
A current switching circuit that is connected between the control unit and the first and second current lines and switches a current line that supplies an alternating current between the first current line and the second current line;
An elevator vibration control device that applies a vibration suppression force to a vibration suppression object through a casing by moving a weight in a vibration suppression direction by the action of the electromagnetic force of the pair of electromagnets on a magnetic body. A casing attached to the object to be controlled;
An elastic body that supports the weight in the casing so as to be displaceable in the vibration damping direction;
A magnetic field generator arranged on the weight and permanently generating a fixed magnetic field in the weight damping direction;
An electromagnet disposed opposite to the magnetic field generator in the casing;
A controller for supplying an alternating current to the electromagnet,
An elevator damping device, wherein a damping force is applied to a damping object through a casing by moving a weight in a damping direction by the action of electromagnetic force between the electromagnet and the magnetic field generation unit.

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