JPS6059802B2 - Normal conductive magnetic levitation vehicle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bogie-type normal conductive magnetically levitated vehicle that is levitated and guided using a normal conductive electromagnet and propelled and controlled by a linear motor, and in particular, when an abnormality occurs in the levitation electromagnet provided on the bogie. This paper relates to a normal conductive magnetically levitated vehicle that takes into account countermeasures.

To briefly describe the general structure of a conventional normal conductive magnetically levitated vehicle with reference to FIG. 1, in the figure, 1 is the car body, 2 is a bogie that receives the load of the car body 1 with air springs 3A and 2B, and 4 is the bogie 2. The attached levitation electromagnet 5 is a guide electromagnet attached to the same truck 2, and these levitation/guidance electromagnets 4 and 5 are placed in a predetermined manner with respect to the levitation rail 7 and the guide rail 8 of the track 6. The current is controlled by a control system (not shown) using a gap sensor, an accelerometer, etc. so that it is floated and guided with a gap.

Further, a linear motor primary plate 9 is attached to the bogie 2, and a linear motor secondary plate 10 is attached on the track 6 facing the linear motor plate 9, so as to obtain the thrust necessary for running the vehicle. In such a trolley-type normal conductive magnetic levitation vehicle, FIG. 2 shows levitation electromagnets 4A,
4B, 4C, and 4D are arranged, and air springs 3A and 3B are arranged on the left and right sides of the bogie 2, and the center of load on the car body is from the left and right air springs 3A and 3B to the center of gravity 11 of the bogie 2, i.e. Levitation electromagnets 4A, 4B, placed on the front, rear, left and right sides
It is designed to be located at the intersection of the diagonal lines of 4C and 4D, and each levitation electromagnet 4A, 4B, 4C, and 4D equally shares the levitation blade against the load acting on the center of gravity 11 of the trolley, allowing for well-balanced fishing. It is designed so that it can be kept floating by aligning it. Here, in the levitation vehicle having the above configuration, if the levitation electromagnets 4A to 4D at the four corners are properly controlled, levitation and guidance traveling can be performed without any problem. The control system is an advanced electronic product and uses delicate electronic circuits, so there is no guarantee that it will not malfunction due to longevity or other reasons. It is necessary to take safety measures to prevent a major vehicle accident from occurring if something goes wrong while the vehicle is running.

In other words, in Fig. 2, if the control system circuit of the front right levitation electromagnet 4A fails, that electromagnet 4A will not be able to obtain a proper levitation blade, and as a result, the remaining three levitation electromagnets will fail. You must continue levitating at 4B, 4C, and 4D.

However, the center of load on the vehicle body remains unchanged and the levitation electromagnets 4B and 4C
Since it is on the line connecting the levitation electromagnets 4A and 4D, which is on the same diagonal position as the levitation electromagnet 4A that caused the above abnormality, the current is reduced to zero because it is not possible to obtain a repulsive force with only attractive force due to the characteristics of electromagnets. Otherwise, use another levitation electromagnet 4B.
・The vehicle overturns centering on the diagonal line connecting 4C. In other words, if one levitation electromagnet circuit fails, the remaining three
Only two of the diagonal positions of the levitation electromagnets bear the full load, and the other electromagnet is almost in a non-energized state.Moreover, the direction in which the failed electromagnet moves away from the rail, that is, the non-energized state It was clear that the displacement of the single electromagnet in the direction toward the rail was completely uncontrolled, leading to problems such as overturning of the vehicle and other serious accidents. This invention was made in view of the above circumstances, and its purpose is to detect the abnormality and act on the bogie even if one of the four levitation electromagnets on the front, rear, left, and right becomes abnormal. The object of the present invention is to provide a device with great safety that can successfully displace the center of load and continue stable floating travel. An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

First, in FIG. 3, on the upper surface of the truck 12, levitation electromagnets 14A, 14B,
14C, 14D and. To accommodate this, a total of four air springs 13A, 13B, 13C, and 13D are provided at a distance from each other to receive the vehicle body load. In addition, the above-mentioned trolley 12 has guiding electromagnets 15A, 15B, 15C,
15D and other necessary machines not shown! The equipment is installed in the same way as before. In addition, 19A and 19B in the figure are air springs 13 that are spaced apart from each other on the left and right sides of the truck 12.
These are control valves of internal pressure control devices A, 13B, 13C, and 13D, which will be described later. Here, according to FIG. 4, the air spring 1
3A/13B and 13C/13D internal pressure control devices 16 are connected to the air source 17, left and right 1;
19B is interposed, and after passing through the control valves 19A and 19B, the air supply pipes 18A and 18B are divided into two branches and connected to the air springs 13A, 13B and 13C via the electromagnetic switching valves 20A, 20B and 20C, 20D. 13D, and under normal conditions, the electromagnetic switching valves 20A to 20D are in communication as shown in the figure, and the control valve 19A connects the right front and rear air springs 13A and 13B, and the control valve 19B connects the left front and rear air springs 13C. - 13D are controlled to maintain appropriate internal pressures.

Further, when an abnormality occurs in any one of the levitation electromagnets 13A to 13D, the electromagnetic switching valve 20A, 20C or 20B
・Switching valve controller 21 that performs switching operation of 20D
This is a configuration that has the following. Note that the switching valve controller 21
is each abnormality detector 22 of the above-mentioned levitation electromagnets 13 to 13D.
It receives signals from A, 22B, 22C, and 22D and automatically makes a decision to perform the above switching operation. Further, each of the abnormality detectors 22A to 22D outputs a signal when any abnormality occurs in the control system (not shown) of each of the levitation electromagnets 13A to 13D. For example, if an element of the electromagnet control system is banked. Since there is a risk that the electromagnet will become completely conductive and cause abnormal adhesion, an overcurrent detector is used to issue a command to cut off the power to the levitation electromagnet within a short period of time, and at the same time the abnormal signal is switched as described above. Valve controller 2
Send to 1. In addition, if there is no current due to some kind of electrical contact failure or disconnection, a ■℃T is placed in the control system circuit of the levitation electromagnet to detect the no current, and if the no current state continues for a certain period of time or more. If it continues, the abnormal signal is switched to the valve controller 21.
Send to. In the case of other abnormalities that may lead to accidents such as contact with the track or collision, such as abnormalities due to poor adjustment such as flowing a current other than the specified current that should originally be controlled by a gap sensor, etc., an accelerometer installed on the bogie is used. It is only necessary to detect the abnormality and send an abnormal signal to the switching valve controller 21. Therefore, to describe the operation of the above configuration,
First, under normal conditions, the front, rear, left, and right air springs 13A to 13D maintain appropriate internal pressure and receive the vehicle body load almost equally, and the bogie 12
The center of gravity of the vehicle body coincides with the center of gravity of the vehicle, and the front, rear, left, and right levitation electromagnets 14A to 14D share this load equally to keep the vehicle buoyed and maintained in a well-balanced manner.

Here, an abnormality occurs in the control system of one of the front or rear left and right levitation electromagnets, and the abnormality detector 22A
When an abnormality signal is sent from any of the levitation electromagnets 22D to 22D to the switching valve controller 21 of the air splash internal pressure control device 16, the controller 21 is set in the same direction as the levitation electromagnet that caused the abnormality in terms of the front-back relationship. It works by switching the electromagnetic switching valve to lower the internal pressure of both the left and right air springs located in the front or rear. In other words, if the levitation electromagnet 14A on the front right side in FIG. 3 suddenly becomes abnormal due to a failure in its control system, the switching valve controller 21 receives an abnormality signal from the abnormality detector 22A that detects the abnormality. Solenoid switching valves 20A and 20 that pass through both left and right air springs 13A and 13C arranged in the same forward position
Issue a switching operation command to C. With this, the double switching valve 20A
・20C switches at the same time, and both front left and right air springs 13
In A and 13C, internal air is released to the atmosphere and the supply of pressurized air from the air source 22 through the control valves 19A and 19B is cut off, reducing the internal pressure and gradually losing the vehicle's load supporting capacity. . At this time, since the vehicle body load is constant, the load acting on both the left and right air springs 13B and 13D in the rear position gradually increases, and the air springs 13B and 13
The height of D will come down slightly, but the control valves 19A and 19B will detect this and immediately remove the air springs 13B and 19B.
Pressurized air is sent to 13D to withstand the increased load on the vehicle body and to maintain a constant air splash height. However, if an abnormality occurs in the front right levitation electromagnet 14A, the vehicle body load will be normal on both the left and right levitation electromagnets 14B and 14B.
In order to move the center of load on the vehicle body rearward, the internal pressure of the air springs at the front is lowered and the pressure at the rear is increased. In other words, if an abnormality occurs in either the left or right levitation electromagnet at the front or rear of the truck 12, the internal pressure of both the left and right air springs at the front or rear in the same direction as the levitation electromagnet in which the abnormality has occurred is reduced, and the left and right air springs are The vehicle body load is applied to the bogie 12 only by the left and right air springs located in the same direction as the normal levitation electromagnet. This eliminates accidents such as overturning of the vehicle due to displacement in the front and rear directions from the center of the load acting on the bogie 12, and a stable floating state can be maintained. In other words, like FIG. 2, FIG. 5 shows the dynamic balance between the car body load acting on the bogie 12 and the floating blade. Under normal conditions, the car body load acts from the front, rear, left and right air springs 13A to 13D. The center of load on the vehicle body coincides with the bogie center of gravity 11A, and each of the front, rear, left, and right levitation electromagnets 14A to 14D equally share the levitation blade to maintain stable levitation.

Here, when the front right levitation electromagnet 14A is cut out due to an abnormality as described above, the internal pressure of the left and right air springs 13A and 13C also in the front position is lowered, and the left and right air springs 13B in the rear position are lowered as described above.・13D alone will bear the entire vehicle body load. Therefore, the center of the vehicle body load acting on the bogie 12 comes to be at the midpoint 11B of the line connecting the rear left and right air springs 13B and 13D. If the weight of the truck is taken into account, the center of load on the floating blade of the electromagnet will be slightly closer to the center of the truck than point 11B, but if the weight of the truck is sufficiently small compared to the car body load, the center of load will be at the point 11B above. You can think of it as reaching a point. Like this 11
If the center of load acts on point B and is shared and supported by the three normal levitation electromagnets 14B, 14C, and 14D, the above-mentioned load will be placed within the triangle connecting the three electromagnets 14B, 14C, and 14D. Since the center of the load is at the center, there is no chance of it falling over like in the past, and it is possible to keep it floating stably. It should be noted that the present invention is not limited to the above-mentioned embodiment, and for example, the switching valve controller 21 may automatically determine based on an abnormality detection signal and cause the switching operation of the electromagnetic switching valves 20A, 20C or 20B, 20D to be performed. However, it is also possible to notify the driver of the abnormality signal by means of an alarm, etc., and to have the driver remotely control the switching operation of the electromagnetic switching valve. It is also important to display abnormal conditions on a monitor in the driver's cab in order to inform the driver of the vehicle situation.

This invention was made as detailed above, and a total of 4
The center of the load acting on the bogie from the car body can be changed back and forth using the internal pressure of air springs, so even if one of the front, rear, left and right levitation electromagnets fails or otherwise fails, the remaining three The levitation electromagnet allows stable levitation to continue, making it extremely safe.

[Brief explanation of the drawing]

Figure 1 is a schematic cross-sectional diagram of a conventional normal conductive magnetically levitated vehicle.
Fig. 2 is an explanatory diagram showing the mechanical balance between the load acting on the conventional bogie and the levitation blade of the levitation electromagnet, and Fig. 3 is an illustration of the bogie structure of a normal conductive magnetic levitation vehicle showing an embodiment of the present invention. A perspective view, FIG. 4 is an explanatory diagram showing an air spring internal pressure control device and an abnormality detector of a levitation electromagnet in the same embodiment, and FIG. 5 is an explanatory diagram showing a load acting on a trolley and a levitation blade of a levitation electromagnet in the same embodiment. It is an explanatory diagram showing the mechanical balance with. 1... Vehicle body, 2, 12... Trolley, 3A, 3B, 13
A・13B・13C・13D・・・Air spring, 4,4A
・4B●4C・4D, 14A・14B・14C・14D
... Levitation electromagnet, 5, 15A/15B/15C/1
5D... Guide electromagnet, 6... Track, 7... Levitation rail, 8... Guide rail, 9... Linear motor 1
Next, 10... Linear motor secondary plate, 11, 11A...
・Bogie center of gravity, 11B...Displacement position of load center, 16・
...Internal pressure control device, 17...Air source, 18A/18B
...Air supply pipe, 19A/19B...Control valve, 20A/
20B/20C/20D...Solenoid switching valve, 21...
Switching valve controller, 22A/22B/22C/22D...
Anomaly detector.

Claims (1)

[Claims] 1. In a bogie-type normal conductive magnetic levitation vehicle that is levitated and guided using normal conductive electromagnets and propulsion controlled by a linear motor, air springs that receive the vehicle body load are connected to the bogie with levitation electromagnets arranged on the front, rear, left and right sides. In addition to providing an internal pressure control device for each of these air springs, a means for detecting an abnormality in each of the above-mentioned levitation electromagnets is provided, and when the abnormality is detected, the levitation electromagnet in front and behind the levitation electromagnet in which the abnormality has occurred is detected. A normal conductor characterized by being able to maintain stable levitation by reducing the internal pressure of the left and right air springs, which are arranged in the same direction when viewed from the relationship, using the control device and shifting the center of the load applied to the bogie from the car body back and forth. Magnetic levitation vehicle.