JP3302843B2 - Maglev train current collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector for a magnetic levitation train, and more particularly to a current collector for a magnetic levitation train utilizing a high frequency component of an AC magnetic field generated by a current induced in a ground-side levitation coil. It is.

[0002]

2. Description of the Related Art FIG. 15 is a sectional view showing an example of a conventional current collector of a magnetic levitation train (Japanese Patent Application No. 4-214251). In the figure, reference numeral 1 denotes a track portion on the ground, and track side walls 2 are provided on both sides thereof. 3 is a track portion 1 between the track side walls 2
Are upper and lower levitation coils disposed on the track side wall 2 along the moving direction of the vehicle body 3, respectively. These upper and lower levitation coils 4, 5 are: Null flux is connected to each other to form a pair at the top and bottom.

A superconducting coil 6 is mounted on the vehicle body 3 so as to face the upper levitation coil 4 and constitutes a superconducting magnet. The superconducting coil 6 is housed in a cryostat 7 as shown in FIG. The superconducting coil 6 has alternating polarities in the moving direction of the vehicle body 3 and is immersed in a cryogenic refrigerant, such as liquid helium, in the cryostat 7 so as to be in a superconducting state. Reference numeral 8 denotes a current-collecting pickup coil mounted on the vehicle body 3 so as to face the lower floating coil 5.

Next, the operation will be described. When the vehicle body 3 moves along the track portion 1, an induced current is induced in each of the levitation coils 4 and 5 by the magnetic field of the superconducting coil 6, and the induced current causes the magnetic field generated by the upper levitation coil 4 and the magnetic field of the superconducting coil 6 to be increased. And the mutual repulsion between the magnetic field generated by the lower levitation coil 5 and the magnetic field of the superconducting coil 6,
The vehicle body 3 comes up.

[0005] With the movement of the vehicle body 3, when viewed from a position fixed on the ground, an AC current is induced in each of the levitation coils 4 and 5 by the superconducting coil 6, and an AC magnetic field is generated. Then, a voltage is generated by linking this AC magnetic field to the current-collecting pickup coil 8 in the vehicle body 3. Then, the obtained electric power is used as a power supply in the train.

However, since the fundamental wave of the AC magnetic field generated by each of the levitation coils 4 and 5 becomes a DC component with respect to the current collecting pickup coil 8, no voltage is generated. Therefore, the high-frequency components of the AC magnetic field generated in each of the levitation coils 4 and 5 are used as the power supply in the train.

FIG. 17 is an explanatory view schematically showing a current collecting system of the current collecting device shown in FIG. The voltage generated in the current collecting pickup coil 8 is supplied to a load via a converter or the like. At this time, a current corresponding to the load flows through the current-collecting pickup coil 8, so that the current-collecting pickup coil 8
Will generate heat. For this reason, the current collecting pickup coil 8 is cooled by the traveling wind.

[0008]

In the current collector of the conventional magnetic levitation train configured as described above, if more power is to be supplied, the current flowing through the current collecting pickup coil 8 increases. Accordingly, the amount of heat generated by the pickup coil 8 for current collection also increases. In this case, the cooling method using the traveling wind has a problem that the amount of cooling heat is insufficient and the temperature of the current collecting pickup coil 8 may exceed an allowable value, and the current collecting performance is limited by the cooling performance. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a magnetic levitation capable of suppressing a temperature rise of a current collecting pickup coil and supplying more power. The purpose is to obtain a current collector for trains.

[0010]

According to a first aspect of the present invention, there is provided a current collector for a magnetic levitation train, which is provided on a vehicle body so as to face a levitation coil on the ground side and is cooled by a refrigerant. It comprises a pickup coil for current collection provided on the vehicle body so as to face the coil, and a pickup coil cooling means for cooling the pickup coil for current collection with a coolant that has cooled the superconducting coil.

According to a second aspect of the present invention, there is provided a current collecting device for a magnetic levitation train, wherein a pickup coil cooling means having a refrigerant flow path for introducing and discharging a refrigerant into a cooling air passage of a current collecting pickup coil is used. is there.

According to a third aspect of the present invention, there is provided a current collector for a magnetic levitation train, comprising: a heat exchanger provided in a cooling air passage of a pickup coil for current collection; and a refrigerant passage for introducing a refrigerant into the heat exchanger. Using the pickup coil cooling means having the following.

According to a fourth aspect of the present invention, there is provided a current collecting device for a magnetic levitation train, wherein a heat conducting member to which heat from a current collecting pickup coil is transmitted, and a refrigerant flow path for flowing a refrigerant so as to cool the heat conducting member. And a pickup coil cooling means having the following.

According to a fifth aspect of the present invention, there is provided a current collecting device for a magnetic levitation train, wherein a heat conducting member is provided so as to also serve as a wall of a duct constituting a cooling air passage of a current collecting pickup coil.

According to a sixth aspect of the present invention, there is provided a current collecting device for a magnetic levitation train, wherein the current collecting pickup coil uses a current collecting pickup coil formed of a tubular conductor, and a refrigerant flow for introducing a refrigerant into the tubular conductor. A pickup coil cooling means having a path is used.

According to a seventh aspect of the present invention, there is provided a power collection device for a magnetic levitation train, which includes a refrigerator for cooling the refrigerant that has cooled the pickup coil for current collection and returning the refrigerant to the superconducting coil.

[0017]

According to the first aspect of the present invention, the cooling capability of the current collecting pickup coil is increased by using the refrigerant having cooled the superconducting coil, thereby increasing the cooling capacity as compared with the case of cooling by traveling wind. Can be increased.

According to the second aspect of the present invention, by introducing and discharging a refrigerant into a cooling air passage of the current collecting pickup coil, the current collecting pickup coil is directly cooled by the refrigerant, thereby cooling the current collecting pickup coil. Improve ability.

According to the third aspect of the present invention, the cooling air is cooled by the refrigerant of the superconducting coil through the heat exchanger, and the current-collecting pickup coil is cooled by the cooled cooling air. Increase the cooling capacity for

According to the fourth aspect of the present invention, the cooling effect on the current-collecting pickup coil is enhanced by cooling the current-collecting pickup coil with the refrigerant of the superconducting coil via the heat conducting member.

According to the fifth aspect of the present invention, the heat conduction member is provided so as to also serve as the wall of the duct constituting the cooling air passage, so that an increase in weight due to the heat conduction member is suppressed and the current is collected by the cooling air. Also promotes cooling of the pickup coil.

According to the sixth aspect of the present invention, by introducing the refrigerant of the superconducting coil into the tubular conductor constituting the pickup coil for current collection, the cooling capacity for the pickup coil for current collection is enhanced.

According to the present invention, the refrigerant that has cooled the current-collecting pickup coil is cooled by a refrigerator so that it can be reused in the superconducting coil.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing a current collector of a maglev train according to Embodiment 1 of the present invention, and FIG. 2 is a II-II of FIG.
3 is a perspective view showing a main part of the apparatus of FIG. 1 with a part cut away, and the same or corresponding parts as those in FIGS. 15 and 16 are denoted by the same reference numerals, and the description thereof will be omitted. Is omitted.

In the figure, reference numeral 11 denotes a duct which is attached to the vehicle body 3 and accommodates the current collecting pickup coil 8 to form a cooling air passage. Entrances 11a, 11b
Is formed. Reference numeral 12 denotes a shield plate provided around the superconducting coil 6 in the cryostat 7 and cooled by a refrigerant. Reference numeral 13 denotes a pickup coil cooling means for introducing and discharging a refrigerant such as helium for cooling the superconducting coil 6 into the duct 11. Refrigerant flow path (refrigerant introduction pipe)
It is.

FIG. 4 is an explanatory view showing an arrangement state of the refrigerant flow path 13 in FIG. 2. The refrigerant flow path 13 is branched into two parts on the way, and the front ends 13a and 13b are respectively connected to the entrances 11a and 11a.
11b. Downstream of the branch of the refrigerant flow path 13, valves 14 a and 14 b controlled according to the moving direction of the vehicle body 3 are provided. Note that the configuration of the current collectors on the left and right sides of the vehicle body 3 is the same.

Next, the operation will be described. As the vehicle body 3 moves, an AC current is induced in each of the levitation coils 4 and 5 (FIG. 15) to generate an AC magnetic field, and a voltage is generated in the current collecting pickup coil 8 linked to the AC magnetic field. The point that electric power is used as a power source in a train is the same as the conventional example. Also, the point that the current collecting pickup coil 8 generates heat when the above-described voltage is generated is the same as the conventional example.

As described above, the current collecting pickup coil 8
Is generated by the cooling air taken into the duct 11. In the first embodiment, since the traveling wind is taken in as it is as the cooling air, when the vehicle body 3 is moving to the left in the figure as shown in FIG. 1, the cooling air flows to the right in the figure. FIG. 3 shows a case where the vehicle body 3 is moving in the opposite direction. That is, the cooling air is introduced from the entrance / exit 11a (11b) located forward in the traveling direction and becomes positive pressure as it moves, and discharged from the entrance 11b (11a) located rearward in the traveling direction and becomes negative pressure as it moves. Is done.

As described above, the current collecting performance of the current collecting device is as follows.
Although the cooling capacity for the current collecting pickup coil 8 is restricted, the cooling capacity only by the traveling wind is limited, and it is difficult to sufficiently improve the current collecting performance. On the other hand, in the device of the first embodiment, the refrigerant flow path 13 is provided,
The refrigerant that has cooled the superconducting coil 6 is introduced into the duct 11 and discharged.

That is, as shown in FIG.
When a refrigerant gas such as helium gas is discharged into the duct 11 from the distal end portion 13b located on the upstream side of the cooling air, the released refrigerant gas flows in the duct 11 together with the cooling air, thereby causing the current-collecting pickup coil 8 to move. Cooled. Which end 13a, 13b of the refrigerant flow path 13 discharges the refrigerant gas is switched by valves 14a, 14b, and the valves 14a, 14b are controlled according to the moving direction of the vehicle body 3.

The refrigerant gas introduced into the duct 11 is after cooling the superconducting coil 6, but is sufficiently lower in temperature than the traveling wind, and the refrigerant gas comes into direct contact with the current collecting pickup coil 8. Therefore, the cooling capacity for the current-collecting pickup coil 8 is greatly increased. Therefore, the temperature rise of the current collecting pickup coil 8 is sufficiently suppressed, and more electric power can be supplied.

The valves 14a and 14b may be controlled not only according to the moving direction of the vehicle body 3 but also according to the temperature of the current collecting pickup coil 8. For example, normally, when both the valves 14a and 14b are closed, and the temperature of the current collecting pickup coil 8 rises above a set value, the valve 14a or 14b corresponding to the moving direction of the vehicle body 3 is set.
May be opened.

Embodiment 2 FIG. In the first embodiment, the vehicle body 3
Although the direction of the flow of the cooling air in the duct 11 changes depending on the moving direction of the cooling air, for example, as shown in FIG. 6, the direction of the cooling air may be fixed in one direction by using a blower 15 or the like. . In this case, the distal end of the refrigerant flow path 13 is
It is only necessary to dispose at one end, and there is no need to branch the coolant channel 13, so that the piping structure of the coolant channel 13 is simplified.

Embodiment 3 FIG. Next, FIG. 7 is a sectional view showing a main part of a current collector of a magnetic levitation train according to Embodiment 3 of the present invention.
FIG. 8 is an explanatory diagram showing a cooling state of the current collecting pickup coil of FIG. In the drawing, reference numeral 16 denotes a heat exchanger provided in the duct 11, reference numeral 17 denotes a refrigerant flow path for introducing the refrigerant that has cooled the superconducting coil 6 into the heat exchanger 16, and reference numeral 18 denotes a heat exchanger 16 and a refrigerant flow path 17. Pickup coil cooling means.

In such a current collector, the traveling wind taken into the duct 11 exchanges heat with the refrigerant gas in the heat exchanger 16 and is cooled. Therefore, the current collecting pickup coil 8
Is cooled by a cooling air having a lower temperature than a mere traveling wind, and the cooling capacity for the current collecting pickup coil 8 is increased. As a result, the temperature rise of the current collecting pickup coil 8 is suppressed to a rise, and the current collecting performance of the current collecting device is improved. In the first embodiment, the refrigerant gas is released into the cooling air. However, in the second embodiment, since the refrigerant gas is merely passed through the heat exchanger 16, the recovery is easy and the refrigerant can be effectively used. It is economical.

The heat exchanger 16 is preferably provided on the upstream side of the cooling air passage. When the direction of the cooling air is changed, the heat exchanger 16 is provided at both ends in the duct 11, and the valve and the like are provided in the same manner as in the first embodiment. May be switched.

Embodiment 4 FIG. Next, FIG. 9 is a sectional view showing a main part of a current collector of a magnetic levitation train according to Embodiment 4 of the present invention.
FIG. 10 is a perspective view of a main part of FIG. In the figure, reference numeral 21 denotes a heat conductive plate as a heat conductive member joined to the end face of each current collecting pickup coil 8.
Is made of a material having excellent heat conductivity such as high heat conductivity CFRP (carbon fiber reinforced plastic). Further, the heat conducting plate 21 is provided with a tubular portion 21a.

Reference numeral 22 denotes a coolant passage through which the coolant that has cooled the superconducting coil 6 flows.
1 is disposed through the cylindrical portion 21a so as to cool the first portion. Reference numeral 23 denotes a pickup coil cooling unit having a heat conductive plate 21 and a coolant channel 22.

In such a current collecting device, the heat generated in the current collecting pickup coil 8 is transmitted to the heat conducting plate 21,
Thus, the heated heat conductive plate 21 is cooled by the refrigerant gas through the refrigerant channel 22. Therefore, the cooling capacity for the current collecting pickup coil 8 is enhanced, and more electric power can be supplied. Further, the recovery of the refrigerant gas is easy and economical.

Embodiment 5 FIG. FIG. 11 is a sectional view showing a main part of a current collector of a magnetic levitation train according to Embodiment 5 of the present invention. Reference numeral 24 denotes a heat conductive plate serving as a heat conductive member also serving as a side wall of the duct 11, and an end face of the current collecting pickup coil 8 is joined to the heat conductive plate 24. The coolant channel 22 is provided so as to be in contact with the heat conduction plate 24. Numeral 25 is a pickup coil cooling means having a coolant channel 22 and a heat conducting plate 24.

As described above, by forming the side wall of the duct 11 as the heat conductive plate 24, the current collecting pickup coil 8 is formed.
Is cooled by the refrigerant via the refrigerant passage 22 and the heat conducting plate 24, and the cooling by the cooling air is also promoted, so that the cooling capacity is enhanced. Further, an increase in the weight of the entire apparatus due to the provision of the heat conductive plate 24 can be suppressed.

Embodiment 6 FIG. Next, FIG. 12 is a perspective view showing a main part of a current collector of a magnetic levitation train according to Embodiment 6 of the present invention, and FIG. 13 is a partial sectional view of FIG. In the figure,
8a is a tubular conductor constituting the pickup coil 8 for current collection, 31 is a wiring bar electrically connected to the tubular conductor 8a, 32 is a pickup connected to both ends of the tubular conductor 8a via an insulating tube 33. The coolant passage 32 is a coolant passage as a coil cooling means.
The coolant gas (FIG. 1) is introduced into the tubular conductor 8a, and the coolant gas that has passed through the tubular conductor 8a is recovered.

In such a current collector, the current collecting pickup coil 8 is directly cooled by the refrigerant gas from the inside of the tubular conductor 8a, so that the temperature rise of the current collecting pickup coil 8 is effectively suppressed. That is, the cooling capacity for the current collecting pickup coil 8 is enhanced, and more electric power can be supplied. Further, the recovery of the refrigerant gas is easy and economical.

Embodiment 7 FIG. FIG. 14 is a schematic configuration diagram showing a cooling system for a pickup coil for current collection according to Embodiment 7 of the present invention. In the figure, 41 is a refrigerant flow path, 42
Denotes a pickup coil cooling means for cooling the current collecting pickup coil 8 with a refrigerant.
As shown in Nos. 6 to 6, the refrigerant can be recovered.
43 is provided in the middle of the refrigerant channel 41 to cool the refrigerant that has cooled the current-collecting pickup coil 8,
It is a refrigerator to return to.

In the seventh embodiment, the refrigerant having passed through the pickup coil cooling means 42 and collected is recooled by the refrigerator 43 and sent to the superconducting coil 6. That is, the refrigerant is superconducting coil 6, pickup coil cooling means 42
And between the refrigerator 43. Therefore, the refrigerant is effectively used, and the economy is improved.

[0046]

As described above, the current collector of the magnetic levitation train according to the first aspect of the present invention is provided with the pickup coil cooling means for cooling the current collecting pickup coil with the refrigerant having cooled the superconducting coil. The cooling capacity for the current-collecting pickup coil can be made higher than in the case of cooling by traveling wind, thereby effectively suppressing the temperature rise of the current-collecting pickup coil and supplying more power. It has the effect that it can be done.

Further, the current collector of the magnetic levitation train according to the second aspect of the present invention uses the pickup coil cooling means having the refrigerant flow path for introducing and discharging the refrigerant in the cooling air passage of the current collecting pickup coil. In addition to the same effects as those of the first aspect of the present invention, since the refrigerant directly contacts the current-collecting pickup coil, the cooling capacity can be further improved.

Further, according to a third aspect of the present invention, there is provided a current collector for a magnetic levitation train, comprising: a heat exchanger provided in a cooling air passage of a current collecting pickup coil; and a refrigerant passage for introducing a refrigerant into the heat exchanger. Since the pickup coil cooling means having the following features is used, in addition to the same effects as those of the first aspect of the present invention, the refrigerant that has passed through the heat exchanger can be easily recovered, and the economic efficiency can be improved. This has the effect.

Further, according to a fourth aspect of the present invention, there is provided a current collector for a magnetic levitation train, wherein a heat conductive member to which heat of a current collecting pickup coil is transmitted, and a refrigerant for flowing a refrigerant so as to cool the heat conductive member. Since the pickup coil cooling means having the flow path is used, in addition to the same effects as those of the first aspect of the present invention, the refrigerant that has passed through the heat conducting member can be easily recovered, and the economic efficiency can be improved. This has the effect that it can be performed.

In the current collector of the magnetic levitation train according to the fifth aspect of the present invention, the heat conducting member is provided so as to also serve as a wall of a duct constituting a cooling air passage of the current collecting pickup coil. In addition to the same effects as the fourth aspect of the present invention, it is possible to suppress an increase in weight due to the heat conducting member, and to promote cooling of the current collecting pickup coil by cooling air.

Further, according to a sixth aspect of the present invention, there is provided a current collecting apparatus for a magnetic levitation train, wherein the current collecting pickup coil uses a current collecting pickup coil formed of a tubular conductor, and a refrigerant is introduced into the tubular conductor. Since the pickup coil cooling means having the flow path is used, in addition to the same effect as the first aspect of the present invention, the current collecting pickup coil can be directly cooled from the inside thereof, and the cooling capacity can be further increased. In addition, it is possible to easily recover the refrigerant and improve the economic efficiency.

Furthermore, the current collector of the magnetic levitation train according to the seventh aspect of the present invention uses a refrigerator for cooling the refrigerant that has cooled the current-collecting pickup coil and returning it to the superconducting coil. In addition to the same effects as the first aspect of the invention, there is an effect that the refrigerant can be effectively used and the economic efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a current collector of a maglev train according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view showing a main part of the apparatus shown in FIG.

FIG. 4 is an explanatory diagram showing an arrangement state of a refrigerant flow channel in FIG. 2;

FIG. 5 is an explanatory view showing a cooling state of the current collecting pickup coil of FIG. 1;

FIG. 6 is a configuration diagram illustrating a main part of a current collector of a magnetic levitation train according to Embodiment 2 of the present invention;

FIG. 7 is a sectional view showing a main part of a current collector of a magnetic levitation train according to Embodiment 3 of the present invention.

FIG. 8 is an explanatory diagram showing a cooling state of the current collecting pickup coil of FIG. 7;

FIG. 9 is a cross-sectional view illustrating a main part of a current collector of a magnetic levitation train according to Embodiment 4 of the present invention.

FIG. 10 is a perspective view of a main part of FIG. 9;

FIG. 11 is a sectional view showing a main part of a current collector of a magnetic levitation train according to Embodiment 5 of the present invention.

FIG. 12 is a perspective view showing a main part of a current collector of a magnetic levitation train according to Embodiment 6 of the present invention.

FIG. 13 is a partial cross-sectional view of FIG.

FIG. 14 is a schematic configuration diagram showing a cooling system for a current-collecting pickup coil according to Embodiment 7 of the present invention.

FIG. 15 is a cross-sectional view showing an example of a conventional current collector of a magnetic levitation train.

FIG. 16 is a side view of a main part of FIG.

FIG. 17 is an explanatory diagram showing an outline of a current collection system of the current collection device in FIG.

[Explanation of symbols]

3 body, 4 upper levitation coil, 5 lower levitation coil,
6 superconducting coil, 8 pickup coil for current collection, 8a
Tubular conductor, 11 duct, 13, 32 refrigerant flow path (pickup coil cooling means), 16 heat exchanger, 17
Refrigerant flow path, 18, 23, 25, 42 pickup coil cooling means, 21, 24 heat conductive plate (heat conductive member), 2
2 Refrigerant channel, 43 refrigerator.

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hidenari Akagi 8-1-1, Tsukaguchi-Honcho, Amagasaki-shi Mitsubishi Electric Corporation Itami Works (72) Inventor Yoshihiro Jizo 8-1-1, Tsukaguchi-Honcho, Amagasaki-shi Mitsubishi Inside the Itami Works, Electric Co., Ltd. (72) Koji Ikeshita 8-1-1, Tsukaguchi Honcho, Amagasaki City Mitsubishi Electric Corporation, Itami Works (72) Yoshio Hirayama 8-1-1, Tsukaguchi Honmachi, Amagasaki City Mitsubishi (72) Inventor Atsushi Hibino 8-1-1, Tsukaguchi Honcho, Amagasaki City Mitsubishi Electric Corporation Itami Works (56) References JP-A-56-133902 (JP, A) 49-37315 (JP, A) JP-A-3-239101 (JP, A) JP-A 52-32504 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60L 13 / 04 B60L 5/00 H01F 6/04 H01F 7/02 H02J 17/00

Claims (7)

(57) [Claims] 1. A superconducting coil provided on a vehicle body so as to face a levitation coil on the ground side and cooled by a refrigerant, and a pickup coil for current collection provided on the vehicle body so as to face the levitation coil. And a pickup coil cooling means for cooling the current collecting pickup coil with a refrigerant that has cooled the superconducting coil. 2. The magnetic levitation train according to claim 1, wherein the pickup coil cooling means has a refrigerant passage for introducing and discharging the refrigerant in a cooling air passage of the pickup coil for current collection. Current collector. 3. The pickup coil cooling means includes a heat exchanger provided in a cooling air passage of the current collecting pickup coil, and a refrigerant flow path for introducing a refrigerant into the heat exchanger. The current collector of a magnetic levitation train according to claim 1. 4. The pickup coil cooling means includes a heat conducting member to which the heat of the current collecting pickup coil is transmitted, and a coolant flow path for flowing a coolant so as to cool the heat conducting member. The current collector of a magnetic levitation train according to claim 1, wherein: 5. The current collection device for a magnetic levitation train according to claim 4, wherein the heat conduction member also serves as a wall of a duct constituting a cooling air passage of the current collection pickup coil. 6. The pickup coil for current collection is constituted by a tubular conductor, and the pickup coil cooling means comprises:
The current collector of a magnetic levitation train according to claim 1, further comprising a refrigerant flow path for introducing a refrigerant into the tubular conductor. 7. The magnetic levitation according to claim 3, further comprising a refrigerator for cooling the refrigerant that has cooled the pickup coil for current collection and returning the refrigerant to the superconducting coil. Train current collector.