JPH0730501U - Electromagnetic wave shield device for high-voltage and high-current wiring for railway vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] In order to prevent effective leakage electromagnetic waves, because the range of inductive interference increases as the voltage and the current of circuits that generate leakage electromagnetic waves increase in railway vehicles. You will need one. [Structure] In a railway vehicle, a power cable shielded by a non-magnetic shield material is used for the inter-carriage line, and the shield material and the connector for connection or the vehicle body are at the same potential.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-voltage and high-current wiring for a railway vehicle, that is, a high-voltage and high-current power line, and relates to an electromagnetic wave shield device for a portion between swinging parts between vehicles.

[0002]

[Prior art]

 In order to prevent inductive interference caused by leakage electromagnetic waves from the inter-vehicle portion of the high-voltage, large-current passing line for power circuits, including harmonics for inverter control, etc., on railroad vehicles, which may give to ground facilities for signal communication and vehicle control circuits, etc. We have taken measures such as keeping a certain distance from the circuit that is susceptible to this and separating the wiring.

[0003]

[Problems to be solved by the device]

 However, as circuits that generate leakage electromagnetic waves become higher in voltage and current, the range of inducing interference becomes wider, and it becomes difficult to take measures especially with the wiring between vehicles as described above, which is effective. There was a demand for measures to prevent leaked electromagnetic waves.

[0004]

[Means for Solving the Problems]

 In consideration of these points, the present inventors have made various trials and experiments, and as a result, use a power cable shielded with a non-magnetic shield material for the vehicle-to-vehicle crossover wire, and connect between the shield material and the connector for connection. It was found that it was necessary to eliminate the potential difference between the car bodies and to drop it to ground, and making the shield material and the connector for connection or the car body the same potential was the solution to the problem. The structure of the non-magnetic shield material was such that a non-magnetic (copper or aluminum) thin film tape was wrapped around the top surface of the insulator and lightly pressed and wound with a braided copper wire over it. We were able to secure the shield effect.

[0005]

[Action]

 As described above, in the present invention, the shield material covering the core wire of the cable is grounded at the same potential as the vehicle body, so that harmful electromagnetic waves can be shielded surely and malfunction of the device from inductive noise and the like can be prevented. You can do it. For example, although I could not listen to the noise at the end of the car between the cars, I could easily listen to it, even though I used radio services on subway lines to provide services. .

[0006]

【Example】

 1 and 2 are a side view and a partially cutaway side view of a different embodiment, FIG. 1 is an electromagnetic wave shield device according to a vehicle body grounding system, and FIG. 2 is a connector grounding system. Is an electromagnetic wave shield device. FIG. 3 is a cross-sectional view of the shielded cable used in FIGS. 1 and 2, and FIG. 4 is a side view of the vehicle end installation on both vehicle bodies of FIG. It is assumed that the same reference numerals are used for the common parts throughout the embodiments of FIGS. 1 and 2, 1 is a shielded cable, 2 is a non-magnetic shield, 3 is a metal fitting for connection to a vehicle body or a connecting connector, 4 is the same soldered part or screwed part, 5 is the end of the vehicle body, 6 is a contraction tube for protection, 7 is a connector body, 7'is a connector stopper, 7 "is a connector stopper receptacle, and 8 is a tightening gland. , 9 are holding metal fittings, and in the shield cable 1, 1a is a sheath body, 1b is an insulator, 1c is a core wire, 1d is a separator, and the non-magnetic shield body 2 is a plate of copper or aluminum, In other words, use a laminated material, lightly press and wind with a braided copper wire on this laminated material, then wrap a thread or cloth on it and press it, then compress the rubber sheath body 1a. It is covered.

Therefore, in the electromagnetic wave shield device in the case of the vehicle body grounding system of FIG. 1, one end of the connection fitting 3 is soldered or screwed 4 to the non-magnetic shield body 2 of the shielded cable 1 and the other end of the vehicle body is connected. It is connected to the end portion 5 and the portion of the connection fitting 3 is covered with a shrinkage tube 6 for protection. Further, in the electromagnetic wave shield device in the case of the connector grounding method of FIG. 2, the non-magnetic shield body 2 of the shielded cable 1 is connected to the connector 7 by using the connecting fitting 3 inside the wire tightening ground 8 of the connector body 7. To the end 5 of the vehicle body. Reference numeral 9 is a retainer for the connecting fitting 3, and 10 is a gasket. In any of these cases, the sheath body 1a of the shielded cable 1 is peeled off and the non-magnetic shield body 2 is directly grounded to the vehicle body 5 using the connection fitting 3 (FIG. 1), or the connector body 7 is connected. Electromagnetic waves can be reliably shielded by grounding to the vehicle body 5 via the vehicle (FIG. 2). It should be noted that even if the high voltage and large current is large, the low voltage and large current or the high voltage and small current can be used as long as the current capacity is large.

[0008]

[Effect of device]

 As described above, the present invention grounds the shielding material in the vehicle-to-vehicle crossover portion by grounding the sheath material in the vehicle-to-vehicle crossover portion using the high-voltage and large-current power draw wire to the same potential as the connection connector or the vehicle body. Can be ensured.

[Brief description of drawings]

FIG. 1 is a side view of an electromagnetic wave shield device according to a vehicle body grounding method according to the present invention.

FIG. 2 is a partially cutaway side view of an electromagnetic wave shield device according to a connector grounding method of the present invention.

FIG. 3 is a sectional view of a shielded cable according to the present invention.

FIG. 4 is a side view of the device in FIG.

[Explanation of symbols]

 1 Shielded Cable 1a Sheath Body 1c Core Wire 2 Non-Magnetic Shield Body 3 Connection Fitting 5 End of Vehicle 7 Connector

Claims (1)

[Scope of utility model registration request] 1. A railway vehicle, characterized in that a power cable shielded with a non-magnetic shield material is used for the inter-carriage line, and the shield material and the connector for connection or the car body have the same potential. Electromagnetic wave shield device for high voltage and high current wiring.