JPH08317502A - Pantograph - Google Patents

Abstract

PURPOSE: To eliminate aerodynamic noise produced by a pantograph while travelling at high-speed by covering electromagnetic energy receiving equipment placed in the roof part of a vehicle with a stream-line dome. CONSTITUTION: This pantograph has a receiver equipment for receiving electromagnetic energy radiated from an electromagnetic energy radiation device for radiating the electromagnetic energy toward a vehicle 1 for railroad, which travels at the high speed of not less than 300km/h, in the roof part of the vehicle 1, and the receiving antenna is covered with a stream-line dome 2. Consquently, the stream of air in the periphery of the dome 2 is hardly put into disorder and separation is hard to bring about. Therefore, aerodynamic noise produced from a pantograph while travelling at high-speed can be eliminated.

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 high-speed railways, and particularly to a train collector system that runs at a high speed of 300 km / h or more and is suitable for improving current collecting performance. And railway vehicles.

[0002]

2. Description of the Related Art Conventionally devised methods for reducing noise in a current collector can be roughly classified into two types. On the other hand, a cover is installed around a conventional current collector to repel the main stream that collides with the current collector, or to reduce the aerodynamic noise generated from the current collector by decelerating the main stream, while at the same time reducing the aerodynamic force of the cover. This is a method aimed at the noise shielding effect. On the other hand, it is a method for reducing the noise of the current collector itself without depending on the above-mentioned cover by reducing the components of the conventional current collector and increasing the size or streamlining.

[0003]

A cover system adopted as a measure for noise reduction in a conventional current collector (Japanese Patent Laid-Open No. 4-3).
04101), the aerodynamic noise generated from the current collector itself is reduced, but at the same time, the aerodynamic noise generated from the cover itself is generated, but it is considered that the commercial operation around 300 km / h is the limit. ing. Furthermore, as the speed increases, the ratio of the tunnel cross section to the vehicle cross section needs to be increased, which tends to keep the vehicle roof low, so the size of the cover itself is also increasing. Therefore, when the vehicle travels at high speed, an increase in running resistance caused by the cover causes a problem of increasing operating cost.

A new type of current collector in which the number of constituent elements of the current collector itself has been reduced and the noise of each element has been reduced
No. 68304), the aerodynamic noise generated from the current collector is not completely eliminated, and the generation of aerodynamic noise cannot be avoided as long as there are parts exposed to the high-speed mainstream. In addition to the aerodynamic noise, the speed dependence of the vehicle speed is small in addition to the aerodynamic noise, even if a method using a cover or a current collector that promotes noise reduction of the current collector itself is used. There are problems such as fricative noise that occurs and radio interference caused by the non-contact state between the overhead line and the current collector.

Further, since it is a railroad vehicle that collects electricity by contactlessly, it is not necessary to prepare overhead line equipment, which requires much time and labor for maintenance and inspection, so that maintenance cost can be reduced.

[0006]

Non-contact current collection by receiving electric power, which is a power source, from an electromagnetic energy radiation device, instead of a current collector which has been a strong noise source of a vehicle traveling at high speed in the past. Thus, by covering the receiver installed on the roof of the vehicle with the streamlined dome, the aerodynamic noise generated from the current collector is fundamentally solved.

Further, by constructing a part of the dome for accommodating the receiving device with quartz glass having a very small transmission loss of electromagnetic energy, the transmission loss can be reduced and the power transmission efficiency can be improved.

[0008]

A non-contact current collecting system in which electromagnetic energy radiated from electromagnetic energy transmitting equipment is received by receiving equipment installed on the roof of a vehicle, and the receiving equipment is installed in a streamlined dome. Since the air flow around the dome does not easily separate, the aerodynamic noise generated from the current collector can be significantly reduced.

Further, since it is a non-contact current collecting system,
It is possible to prevent sliding noise and radio interference due to mechanical disconnection between the overhead wire and the rubbing plate.

[0010]

FIG. 1 shows an embodiment of a current collector according to the present invention. A streamlined dome that covers the electromagnetic energy receiving device is provided on the roof of a high-speed vehicle. Since the receiving equipment is installed in the streamlined dome, it hardly disturbs the air flow around the dome and peeling is unlikely to occur, so aerodynamic noise is compared to other sound sources like a conventional current collector. Therefore, it is possible to promote the noise reduction of the entire high-speed railway vehicle without being outstanding. Further, unlike the conventional case, since no mechanical sliding portion between the overhead wire and the current collecting portion of the current collecting device is present, sliding noise caused by sliding and radio interference due to disconnection are eliminated. Further, since it is a non-contact current collector, there is no sliding part, and there is an advantage that there is no need for frequent maintenance and inspection work such as a rubbing plate of a current collector mounted on the current Shinkansen.

FIG. 2 shows another embodiment according to the present invention.
A part of the dome that covers the receiving equipment installed on the roof of a high-speed vehicle is made of quartz glass, which has a low transmission loss of electromagnetic waves. Since it is possible to reduce the loss in the process of receiving the electromagnetic energy transmitted from the transmitting device by the receiving equipment, it is possible to prevent the efficiency of the entire non-contact current collecting system from being deteriorated.

FIG. 3 shows the structure of the receiving equipment. The main components are a horn antenna that receives the electromagnetic waves transmitted from the transmission equipment and a rectifier that converts electromagnetic energy into electricity. Although the quadrilateral pyramidal horn antenna is adopted as the antenna in FIG. 3, a dish-shaped parabolic antenna or a Yagi antenna may be adopted.

[0013]

As described above, according to the present invention, electromagnetic energy is transferred to collect power for supplying electric power to a high-speed railway vehicle, so that aerodynamic noise generated from a current collector during high-speed traveling, which has been a problem in the past, is eliminated. Not only does it solve the boundary problem between overhead lines and current collectors.

[Brief description of drawings]

FIG. 1 is a perspective view of a current collector according to an embodiment of the present invention.

FIG. 2 is a perspective view of a current collector according to another embodiment of the present invention.

FIG. 3 is a perspective view of receiving equipment of the current collector of the embodiment of the present invention.

[Explanation of symbols]

1 ... Vehicle, 2 ... Dome, 3 ... Quartz glass, 4 ... Transmission equipment, 5 ... Horn antenna, 6 ... Energy conversion device, 7 ...
High voltage cable.

Claims (4)

[Claims] 1. A railway vehicle driven by electric power, comprising receiving equipment for receiving electromagnetic energy radiated from an electromagnetic energy source radiating device for radiating electromagnetic energy toward the railway vehicle, and receiving by the receiving equipment. A railway vehicle equipped with an energy conversion means for converting the electromagnetic energy into electric power, wherein the receiving equipment is provided on a vehicle roof, and the receiving antenna is covered with a streamlined dome. 2. The railway vehicle according to claim 1, wherein a part of a streamlined dome covering the receiving equipment is made of quartz glass. 3. The railway vehicle according to claim 1 or 2, wherein a storage battery for supplying power to the power source of the vehicle when not receiving is mounted on the vehicle. 4. A railway vehicle driven by electric power, comprising receiving equipment for receiving electromagnetic energy radiated from an electromagnetic energy source radiation device for radiating electromagnetic energy toward the railway vehicle, and receiving by the receiving equipment. A railway vehicle equipped with an energy converting means for converting the electromagnetic energy into electric power, wherein the railway vehicle receives electromagnetic energy emitted from a plurality of electromagnetic energy emitting facilities.