JP3316328B2 - Superconducting magnet test apparatus and superconducting magnet test method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention simulates the electromagnetic force generated in a superconducting coil mounted on a vehicle and a superconducting magnet device including the same when a propulsion coil installed on a track is short-circuited in a magnetic levitation railway. TECHNICAL FIELD The present invention relates to a superconducting magnet test apparatus and a superconducting magnet test method for generating electromagnetic waves and testing the effect of the electromagnetic force.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 6 is a front view of a vehicle and a track of the magnetic levitation railway, and FIG. 7 is a front view of the superconducting magnet device 2.

The superconducting magnet device 2 includes a superconducting coil 3 mounted on a vehicle 1 of a magnetic levitation railway and used for levitation, guidance and propulsion of the vehicle 1. The periphery of the superconducting magnet device 2 is covered by an outer tank 5 which is a vacuum heat insulating container. An annular inner tub 4 is suspended in the outer tub 5 via a support 6, and the entire superconducting magnet device 2 is supported and fixed to the underframe 10 of the vehicle 1 by the support 6.
The inner tank 4 contains the superconducting coil 3 and a refrigerant (for example, liquid helium) for cooling the coil.

[0004] A vehicle 1 of a magnetic levitation railway obtains propulsion by a propulsion coil 8 installed on a track 7. When the vehicle 1 starts to move due to the propulsion force, the magnetic field generated by the exciting current of the superconducting coil 3 changes at the same time, so that the levitation current is induced in the levitation coil 9 installed on the track 7 by electromagnetic induction, and a levitation force is generated. The vehicle 1 travels by obtaining the levitation force.

Here, consider a case where the propulsion coil 8 is short-circuited for some reason while the vehicle 1 is running. At this time, a closed loop is formed in the propulsion coil 8 due to the short circuit. The magnetic field generated by the exciting current flowing through the superconducting coil 3 changes in the traveling direction as the vehicle 1 travels in the propulsion coil 8 in which the closed loop is formed, so that a current is induced. The Lorentz force is generated by the magnetic field due to the short-circuit current and the exciting current of the superconducting coil 3, and an electromagnetic force is generated in the superconducting coil 3. Further, the magnetic field due to the short-circuit current flowing through the propulsion coil 8 induces an eddy current in the outer tub 5 in the running vehicle 1, and a Lorentz force is generated by the eddy current and the DC magnetic field generated by the superconducting coil 3. Also electromagnetic force works.

Such an electromagnetic force is used as an impact force to quench the superconducting coil 3 or a permanent current switch (not shown),
This causes damage to a cooling piping system (not shown), deformation of the outer tank 5 having a vacuum insulation function, and damage to ground coils including the propulsion coil 8 and the levitation coil 9.

Further, the rigidity of the supporting portion between the superconducting magnet device 2 and the vehicle frame 10 affects not only the ride comfort of the passenger when the vehicle is running, but also the load acting on the superconducting coil 3. May cause quench in the superconducting coil 3.

[0008]

The quench resistance of the superconducting coil 3 against such an electromagnetic force, the shock resistance of the outer tank 5 having a vacuum heat insulating function, the shock resistance of various components, and the rigidity of the supporting portion. It is necessary to verify in advance the degree of influence on quench.

However, conventionally, there has been no method for generating such an electromagnetic force and verifying the influence thereof, except for using a vehicle and a track which are actual machines.

Accordingly, an object of the present invention is to simulate the electromagnetic force generated in a superconducting coil and a superconducting magnet device mounted on a vehicle when a propulsion coil installed on a track is short-circuited, and to simulate the effect of the electromagnetic force. An object of the present invention is to provide a superconducting magnet testing apparatus and a superconducting magnet testing method capable of performing a test.

[0011]

SUMMARY OF THE INVENTION A superconducting magnet test apparatus according to the present invention includes a superconducting coil mounted on a vehicle of a magnetically levitated railway when a propulsion coil installed on a track of the magnetically levitated railway short-circuits, and the superconducting coil mounted thereon. A superconducting magnet test apparatus for simulating a force applied to a superconducting magnet apparatus, comprising: a first and a second plate-shaped underframe arranged in parallel at a predetermined interval from each other; And the propulsion coil attached to the surface of the second underframe facing the first underframe so that the axis of the superconducting coil coincides with the axis of the propulsion coil. , And a superconducting magnet device mounted by a support together with a superconducting coil.
Further, the superconducting magnet test method of the present invention is a superconducting magnet test method for testing the effect of electromagnetic force applied to a superconducting coil and a superconducting magnet device of the superconducting magnet test device,
Exciting the superconducting coil by flowing a current flowing in the vehicle, flowing a current induced to the propulsion coil when a short circuit occurs on the track, and controlling the effect of electromagnetic force applied to the superconducting coil and the superconducting magnet device. Testing.

[0012]

In the superconducting magnet test apparatus of the present invention, a propulsion coil and a superconducting magnet test apparatus including a superconducting coil are installed facing each other, as in the actual machine, and the current actually passed in the vehicle flows to excite the superconducting coil. After that, the current induced when the propulsion coil is actually short-circuited is simulated. An electromagnetic force is generated in the superconducting coil due to the interaction between the magnetic field generated by the current flowing through the propulsion coil and the current of the superconducting coil. This makes it possible to simulate the electromagnetic force acting on the superconducting coil due to the short circuit of the propulsion coil while the actual machine is running,
The effect of the electromagnetic force on the reliability of the superconducting magnet device can be tested.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a superconducting magnet test apparatus according to the present invention will be described with reference to FIG. FIG. 1 shows a side view of this embodiment. As shown in the figure, a plurality of pedestals 13 are placed on the ground, and a single base 14 is placed and fixed thereon in a horizontal direction. On the base 14, a first plate-shaped frame 11 s and a second plate-shaped frame 11 e are arranged in parallel at an interval from each other.
On the second frame 11e and the second frame 11e, a ceiling frame 11t is horizontally mounted and fixed. The first reinforcement 15s and the second reinforcement 15e are connected to the edge of the base 14 and the first frame 11s so that the first frame 11s and the second frame 11e are firmly fixed to the base 14. And the upper end of the second 11e.

A propulsion coil 8 is mounted on a surface of the first frame 11s facing the second frame 11e so that its axis is perpendicular to the surface facing the second frame 11e. On the other hand, the superconducting magnet is provided on the surface of the second underframe 11e facing the first underframe 11s such that the axis of the superconducting coil 3 is perpendicular to the facing surface and coincides with the axis of the propulsion coil 8. The device 2 is mounted by a support 12.

First, in order to simulate a state in which the vehicle is running,
An electric current flows through the superconducting coil 3 included in the superconducting magnet device 2 to excite it. Next, in order to simulate a state in which the propulsion coil 8 is short-circuited, a current flowing when the propulsion coil 8 is actually short-circuited on the track as shown in FIG.

FIG. 2 shows the relationship between the time during which the short-circuit current flows and the magnetomotive force due to the short-circuit current. The time axis is set so that the time at which the magnetomotive force due to the short-circuit current is maximized is time 0. I have. In this case, the current starts to flow to the propulsion coil 8 at time (−5) msec, increases the current value until time 0 msec, and thereafter, the current flows so that the current value becomes 0 at time 5 msec.

The current flowing through the propulsion coil 8 generates a fluctuating magnetic field, and an interaction between the fluctuating magnetic field and the exciting current flowing through the coil 3 generates an electromagnetic force. Thus,
An electromagnetic force, i.e., an impact force applied to the superconducting coil 3 and the superconducting magnet device 2 can be simulated by a short-circuit current generated in the propulsion coil 8 during running of the vehicle. For example, changing the current flowing in the propulsion coil 8 Thus, the electromagnetic force when the superconducting coil 3 is quenched can be obtained.

Thus, it is possible to verify the influence of the impact force applied to the superconducting coil and the superconducting magnet device without actually running the actual machine.

Another embodiment will be described with reference to FIG.
FIG. 3 shows a front view of this embodiment. As shown in the drawing, unlike the above-described embodiment, the axis of the propulsion coil 8 and the axis of the superconducting coil 3 included in the superconducting magnet device 2 are shifted from each other by the length DX in the front-rear direction and by DZ in the height direction. And are supported and fixed to the respective underframes 11s and 11e. In this manner, when the axes of the coils are shifted and fixed to the frames 11s and 11e and the electromagnetic force is generated in the above-described procedure, the rotational moment of the electromagnetic force can be changed.

FIG. 4 shows a case where DX = 0 mm in FIG.
Shows the rotational moment applied to the superconducting coil 3 when DX = 175 mm. Both FIG. 4 and FIG.
The time axis is set so that the time at which each rotational moment is maximized is time 0. Time (-5) mse
c, the current starts flowing to the propulsion coil 8 for 0 msec.
The current value is increased until the time is 5 msec.
And the current is passed so that the current value becomes zero. Mx indicates a rotational moment in the front-rear direction, My indicates a rotational moment in the left-right direction, and Mz indicates a rotational moment in the height direction.

As described above, since electromagnetic forces having different directions can be simulated, it is possible to test the effects of electromagnetic forces having different directions.

Further, the superconducting magnet device 2 and the second underframe 1 are used to change the number of bolts for attaching the support 12 to the second underframe 11e or to change the material of the support 12.
The load acting on the superconducting coil 3 can be changed by changing the support rigidity with respect to 1e. As a result, the effect on the quench generated in the superconducting coil 3 due to the superconducting magnet device 2 and the support rigidity of the vehicle underframe can be tested.

Further, if the structure for mounting the propulsion coil 8 and the first underframe 11s is a structure for mounting on an actual track,
A phenomenon acting on the propulsion coil 8 when the propulsion coil is short-circuited can be simulated. Further, the test can be performed by attaching the propulsion coil 8 and the underframe 11s by a structure different from the structure actually attached to the track. For example, if the test is performed with the entire back surface of the propulsion coil 8 fixed to the first underframe 11 s, the superconducting magnet device 2 is subjected to a more severe condition than a condition where a short circuit occurs in the propulsion coil 8 actually fixed to the track. A test for applying a load to the superconducting magnet device 2 can be verified.

[0024]

According to the present invention, a superconducting coil capable of simulating the electromagnetic force generated in a superconducting coil and a superconducting magnet device mounted on a vehicle when a propulsion coil installed on a track is short-circuited and capable of testing the effect thereof. A magnet test apparatus and a superconducting magnet test method can be provided.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a superconducting magnet test apparatus according to the present invention.

FIG. 2 is a graph showing a relationship between a current flowing through a propulsion coil and a magnetomotive force excited by the current.

FIG. 3 is a front view showing another embodiment according to the present invention.

FIG. 4 is a graph showing the relationship between the current flowing through the propulsion coil and the rotational moment generated when the propulsion coil and the superconducting coil are installed without shifting their axes.

FIG. 5 is a graph showing the relationship between the current flowing through the propulsion coil and the rotational moment generated when the propulsion coil and the superconducting coil are installed with their axes shifted.

FIG. 6 is a front view showing a track and a vehicle of the magnetic levitation railway.

FIG. 7 is a front view showing the superconducting magnet device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle 2 Superconducting magnet device 3 Superconducting coil 4 Inner tank 5 Outer tank 6 Supporting tool 7 Track 8 Propulsion coil 9 Floating coil 10, 11s, 11e Underframe 11t Ceiling frame 12 Supporting part 13 Base 14 Base 15s, 15e Reinforcing material

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masamichi Kawai 2-4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Keihin Works, Toshiba Corporation (72) Inventor Junji Omori Tsurumi-ku, Yokohama-shi, Kanagawa 2-4 Suehirocho, Keihin Plant, Toshiba Corporation (72) Inventor Hiroyuki Nakao 1 Toshiba-cho, Fuchu-shi, Tokyo Inside Fuchu Plant, Toshiba Corporation (56) References JP-A-4-190171 (JP) (A) JP-A-6-148105 (JP, A) JP-A-54-58701 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60L 13/10 G01R 31/00 G01N 25/20

Claims (5)

(57) [Claims] 1. A simulated electromagnetic force applied to a superconducting coil mounted on a vehicle of a magnetically levitated railway and a superconducting magnet device including the same when a propulsion coil installed on a track of the magnetically levitated railway short-circuits. A superconducting magnet test apparatus, comprising: first and second plate-shaped underframes arranged in parallel at a predetermined distance from each other; and a surface of the first underframe facing the second underframe. The supporting coil and the superconducting coil are supported on the surface of the second underframe facing the first underframe so that the axis of the superconducting coil coincides with the axis of the propulsion coil. And a superconducting magnet device mounted by the unit. 2. The propulsion coil and the superconducting magnet device are mounted on the first and second underframes respectively such that the axes of the propulsion coil and the superconducting coil are shifted from each other. The superconducting magnet test apparatus according to the above. 3. A superconducting magnet test method for testing the effect of an electromagnetic force applied to a superconducting coil and a superconducting magnet device of a superconducting magnet testing device according to claim 1 or 2, wherein a current actually flowing in a vehicle is provided. To excite the superconducting coil, flowing a current induced when a short circuit occurs on the track to the propulsion coil, and testing the effect of the electromagnetic force applied to the superconducting coil and the superconducting magnet device. And a superconducting magnet test method. 4. The superconducting magnet test method according to claim 3, further comprising the step of changing the rigidity of said support portion. 5. The superconducting magnet test method according to claim 3, further comprising a step of changing a mounting structure between the first underframe and the propulsion coil.