KR101371520B1 - A shutter control apparatus in a high magnetic field using ultrasonic waves - Google Patents

Abstract

An object of the present invention is to control the shutter using an ultrasonic motor that operates in a high magnetic field.
The present invention discloses a shutter device for observing the plasma generated in the vacuum chamber of the Tokamak to achieve the above object.
According to an embodiment of the present invention, a shutter device includes: a shutter for opening and closing a vacuum window formed in a vacuum container of the tokamak; And an ultrasonic motor for driving the shutter.

Description

SHUTTER CONTROL APPARATUS IN A HIGH MAGNETIC FIELD USING ULTRASONIC WAVES}

The present invention relates to a shutter control device, and more particularly, to a shutter device for opening and closing a vacuum window of a tokamak vacuum container, and a shutter device for controlling a shutter in a high magnetic field environment using an ultrasonic motor.

In general, a superconducting tokamak device, a next-generation fusion research device, consists of a toroidal coil for confining deuterium in a plasma state to a strong magnetic field, and a poroidal coil for generating a plasma and controlling its position and shape.

In other words, the main components of the Tokamak device, the fusion test apparatus, are superconducting magnets, superconducting magnet structures, vacuum vessels, cryostats, thermal shields, Plasma Facing Component (PFC), Plasma Diagnostics, etc.

Superconducting magnets, unlike phase-conducting electromagnets, use a coiled superconducting conductor (CICC) in the coil that disappears when the temperature falls below a certain temperature, so no heat is generated. Makes it possible to do

The Tokamak device consists of three superconducting magnet structures. The TF (Toroidal Field) magnetic structure is made of a stranded conductor inside the tube, which surrounds the superconducting wire with a rectangular metal tube, and then wound the conductor in a D-shape with a winder. The coil is made of 16 D-shaped magnets.

Like the TF magnet structure (coil), a superconducting magnet, which rapidly changes the magnetic field to generate a plasma, and is composed of a PF (Poloidal Field) magnet structure that generates a plasma current together with the central solenoid (CS) magnet structure.

In addition, a central solenoid (CS) magnet structure for inducing a current to the plasma is formed in the center, and the vacuum vessel in which the plasma is generated and confined is configured inside the D-shaped TF magnet structure.

1 is a view showing a conventional tokamak, Figure 2 is a view showing an embodiment of a conventional vacuum window shutter device.

As shown in the figure, the tokamak 1 is provided with a vacuum vessel 20 and the superconducting magnet structure 10 surrounding the vacuum vessel 20, first, the superconducting magnet (SC Magnet) of the superconducting magnet structure 10 ) Is for trapping high temperature plasma without touching the wall of the vacuum vessel, and has a main device, a toka membrane (1).

The tokamak 1 is responsible for the generation, confinement, and control of plasma using a TF (Toroidal Field) and a PF (Poloidal Field) coil.

The superconducting magnet structure 10 is composed of a TF structure 11 composed of TF (Toroidal Field) coils, a PF structure composed of PF (Poroidal Field) coils 12, and a CS structure 13 composed of CS (Central Solenoid) coils. Each structure is connected by a connecting structure (not shown).

The TF coil built into the TF structure 11 is operated with a DC current of about 35KA, and the CS coil of the CS structure 13 and the PF coil of the PF structure 12 are pulsed to perform electromotive force due to mutual magnetic field changes. It generates inside the donut-shaped vacuum vessel to generate a plasma and serves to constrain the plasma along with the plasma current and the TF magnetic field.

The vacuum vessel 20 is formed with a vacuum window 30 which can see the inside thereof, and the plasma inside the vacuum vessel 20 is diagnosed through the vacuum window 30.

As an example, when looking at the diagnosis of the charge exchange spectroscopy (CES) during the diagnosis of the plasma, when the neutron beam source 50 irradiates the plasma with the neutron beam through any one of the vacuum windows 30, interaction occurs to generate visible light. Will be reflected.

The reflected visible light is received by a charge exchange spectroscopy (CES) 60 through another adjacent vacuum window 30, and the received visible light is analyzed to diagnose the plasma.

A plurality of the vacuum window 30 is formed in the vacuum vessel 20, each of the vacuum window 30 is provided with a shutter device 40, when the vacuum window 30 is exposed to the plasma for a predetermined time, the plasma The reaction is required to coat the surface of the vacuum window 30 so that the plasma can not be diagnosed.

2 shows a shutter device 30 'according to the prior art. The shutter device 30 ′ is provided with a plurality of links to rotate along the inner surface of the vacuum vessel 20 to cover or open the vacuum window 30. According to the prior art, such a shutter device 30 'is controlled by using an air motor.

As described above, when the shutter is controlled using a pneumatic motor, since the precise control is not possible, the failure is frequent and the external control is not possible, thereby increasing the risk of an accident.

Patent Registration No. 10-1105793

The following description provides a simplified description of one or more embodiments in order to provide a basic understanding of embodiments of the invention. This section is not a comprehensive overview of all possible embodiments and is not intended to identify key elements or to cover the scope of all embodiments of all elements. Its sole purpose is to present the concept of one or more embodiments in a simplified form as a prelude to the more detailed description that is presented later.

The present invention is to solve the above problems, it is an object of the present invention to control the shutter using an ultrasonic motor that operates in high magnetic fields.

Another object of the present invention is to set a shutter operation limit in preparation for an operation error.

The present invention discloses a shutter device for observing the plasma generated in the vacuum chamber of the Tokamak to achieve the above object.

The shutter device according to an embodiment of the present invention, the shutter for opening and closing the vacuum window formed in the vacuum container of the tokamak; And an ultrasonic motor for driving the shutter.

The shutter apparatus may further include an ultrasonic motor controller for controlling the ultrasonic motor.

The ultrasonic motor control unit may further include a plate attached to a rotating shaft leading to the shutter; Sensing units positioned at both ends of the movement range of the plate; And relay circuit units respectively connected to the sensing units.

According to the above configuration of the present invention, it is possible to obtain the effect of more precise and safe control of the shutter in a high magnetic field environment using the ultrasonic motor.

To the accomplishment of the foregoing and related ends, the one or more embodiments comprise the features hereinafter described and particularly pointed out in the claims. The following description and the annexed drawings set forth in further detail certain illustrative aspects of these embodiments. Those skilled in the art will appreciate that these aspects are merely exemplary and that various modifications are possible. Furthermore, the presented embodiments are construed to include both these embodiments and equivalents of such embodiments.

According to convention, various features of the drawings may not be shown by actual measurement. Thus, the dimensions of the various features may optionally be enlarged or reduced for simplicity. Also, some of the figures may be simplified for simplicity. Accordingly, the drawings may not show all components of the presented device (e.g., device) or method. Finally, like reference numerals may be used to indicate similar features throughout the description and drawings.
1 is a view showing a conventional tokamak.
2 is a view showing a conventional vacuum window shutter device.
3 is a view showing a shutter device according to an embodiment of the present invention.
4 is a view illustrating a part of a shutter device according to an embodiment of the present invention.
5 shows a flowchart in which a shutter device operates according to an embodiment of the present invention.

Various embodiments are now described with reference to the drawings, wherein like reference numerals are used throughout the drawings to refer to like elements. For purposes of explanation, various descriptions are set forth herein to provide an understanding of the present invention. It is evident, however, that such embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing the embodiments.

3 is a block diagram of a shutter device 300 according to an embodiment of the present invention.

In one embodiment of the present invention, the shutter device 300 for observing the plasma generated inside the vacuum chamber of the Tokamak, shutter (not shown) for opening and closing the vacuum window formed in the vacuum container of the Tokamak, and the shutter It may include an ultrasonic motor 302 for driving.

In the present invention, since the ultrasonic motor 302 is used instead of the pneumatic motor, as in the conventional art, the ultrasonic motor 302 is easy to operate even in a high magnetic field environment, and the shutter is further refined. Can be controlled, and the shutter can be suddenly prevented from moving faults, thereby reducing the cost.

In one embodiment of the present invention, the shutter device 300 may further include an ultrasonic motor control unit for controlling the ultrasonic motor.

The ultrasonic motor control unit is for building a shutter operation limit setting system in preparation for an operation error while using an ultrasonic motor.

In one embodiment of the present invention, the ultrasonic motor control unit, the plate 303 attached to the rotating shaft 305 leading to the shutter; Sensing units (304a, 304b) located at both ends of the rotation range of the plate; And relay circuit parts 301a and 301b respectively connected to the sensing parts.

The plate 303 is attached to the rotating shaft 305 leading to the shutter, so that as the ultrasonic motor 302 rotates, the plate 303 may rotate.

The plate 303 may rotate left and right from the center, but since the sensing units 304a and 304b are located in the rotation path of the plate 303 so as to restrict the rotation range, the rotation range of the plate 303 is about 120 degrees. Constrained to degree. This range of rotation of the plate 303 is exemplary and not limited now.

As described above, when the plate 303 touches the sensing units 304a and 304b, the rotation should be stopped, but the rotation may not be stopped due to a failure or the like. If the rotation of the plate 303 does not stop, the plate 303 may break. In particular, when using a pneumatic motor such a phenomenon may occur more severely.

In order to prevent such a case, if it is detected that the plate 303 is located in the sensing units 304a and 304b, the relay circuit units 301a and 301b connected to the sensing units 304a and 304b are no longer provided. It is possible to prevent the current from flowing, thereby making the ultrasonic motor 302 no longer operate.

4 is a view illustrating a part of a shutter device according to an embodiment of the present invention.

In one embodiment of the present invention, the shutter device may include a plate 403, sensing units 404a and 404b, and a rotation axis 405.

The rotating shaft 405 may serve to transfer the drive from the ultrasonic motor to the shutter.

The plate 403 may be connected to the rotation shaft 405 and configured to move the rotation range according to the rotation of the rotation shaft.

Sensors 404a and 404b that can determine the rotational range of the plate 403 are located within the rotational angle of the plate 403.

When the ultrasonic motor is driven to open the shutter, for example, the plate 403 may move in the direction of the sensing unit 404b, and when the plate 403 is detected by the sensing unit 404b, the plate 403 may be detected. Since the part 404b cannot be pushed further, the movement of the rotating shaft and the shutter can also be prevented.

When the ultrasonic motor is driven and the shutter is closed, for example, the plate 403 may move in the direction of the sensing unit 404a, and when the plate 403 is detected by the sensing unit 404a, the plate 403 is detected. Since the part 404a cannot be pushed out further, the movement of the rotating shaft and the shutter can also be prevented.

When the plate 403 is detected by the sensing units 404a and 404b, the plate 403 attempts to push the sensing units 404a and 404b further, causing the plate 403 to fail and furthermore, the shutter to fail. To prevent this, when the plate 403 touches the sensing sections 404a and 404b, no current can flow through the relay circuit sections.

5 is a flowchart illustrating an operation of a shutter control apparatus according to an exemplary embodiment of the present invention.

First, the shutter may be driven by using an ultrasonic motor (501). When driving to open the shutter, the plate attached to the rotating shaft may rotate in one direction (502). When the plate rotating in one direction touches the sensing unit, the ultrasonic motor may stop driving (503). Here, when the plate is in contact with the sensing unit in preparation for not stopping the rotation of the rotating shaft even though the ultrasonic motor is in contact with the plate, the relay circuit connected between the sensing unit and the ultrasonic motor can be broken to prevent failure. When driving to close the shutter, the plate attached to the rotating shaft may rotate 504 in the opposite direction. When the plate rotating in the opposite direction touches the sensing unit, the ultrasonic motor may stop driving (505). Here, when the plate is in contact with the sensing unit in preparation for not stopping the rotation of the rotating shaft even though the ultrasonic motor is in contact with the plate, the relay circuit connected between the sensing unit and the ultrasonic motor can be broken to prevent failure.

According to one embodiment of the present invention, the shutter device may include a thomson shutter device, but is not limited thereto and may include any shutter device known in the art.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention should not be construed as limited to the embodiments set forth herein but is to be accorded the widest scope consistent with the principles and novel features set forth herein.

Claims (3)

A shutter device for observing the plasma generated inside the vacuum chamber of the tokamak,
A shutter for opening and closing a vacuum window formed in the vacuum container of the tokamak;
An ultrasonic motor for driving the shutter;
An ultrasonic motor controller for controlling the ultrasonic motor;
Lt; / RTI >
The ultrasonic motor control unit,
A plate attached to a rotating shaft leading to the shutter;
Two sensing units located at both ends of the rotation range of the plate; And
Relay circuit units respectively connected to the sensing units
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The rotation range of the plate is constrained to 120 degrees,
Shutter for observing the plasma generated inside the vacuum chamber of the Tokamak, which prevents the rotation of the plate by disconnecting the relay circuit part connected to the sensing part touched by the plate when the plate rotates and touches one of the two sensing parts. Device.

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