JPH0691681B2 - Pantograph active control system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a current collecting system in an electric vehicle.

[Conventional technology]

FIG. 2 is a block diagram showing a current collecting system using a pantograph and an overhead line in a conventional electric railway formation vehicle. 1 is a vehicle, 2 and 2'are front and rear pantographs in the traveling direction, and 3 is an overhead line. is there.

The vehicle collects electric power from the overhead line 3 by the pantographs 2 and 2'and runs.

In a conventional vehicle, multiple pantographs in one train
When 2,2 'is present, each pantograph 2,2' comes into contact with the overhead line 3 with a predetermined constant value, for example, a value of a static lifting force of 5.5 kg. Although the dynamic contact force between the pantographs 2 and 2'changes, the static push-up force value itself does not change.

When a vehicle having a plurality of pantographs 2 and 2 ′ travels during formation as described above, the pantograph 2 located at the top is
Runs while contacting the overhead line 3 in a stationary state, while the rear pantograph 2'is excited by the contact of the leading pantograph 2 and runs while contacting the vibrating overhead line 3 as shown in FIG. And collect electricity. Furthermore, in FIG. 3, the third pantograph runs while contacting the overhead wire that is excited by the first and second pantographs and is vibrating further, and FIG. 4 shows the top pantograph. On the other hand, this is one of the actual measurement examples in which the line separation rate of the rear pantograph increases.

[Problems to be Solved by the Invention]

However, multiple pantographs can be used during the conventional one formation.
In the electric vehicle having 2,2 ', as described above, the pantograph 2'in the rear position during traveling contacts the overhead line 3 whose vibration is excited by the pantograph 2 in the front position to collect current, which is inevitable. In addition, the ability to follow the overhead line 3 is reduced, and the contact separation rate is increased. Further, as shown in FIG. 3, the third pantograph travels in the overhead wire excited by both the first and second pantographs, so that the derailing rate further increases. As described above, in the conventional case, when there are multiple pantographs during knitting, there is a drawback that the derailment rate increases in the rear pantographs, which interferes with normal operation due to increased wear of the contact plate and increased arc noise. There is a case.

The current collection system of the present invention eliminates the drawbacks in the rear pantograph in a vehicle equipped with a plurality of conventional pantographs as described above.

[Means for Solving the Problems]

That is, a means for achieving the object is to arrange a plurality of laser receiving / transmitting devices between a front pantograph and a rear pantograph in the formation of an electric vehicle so that the laser receiving / transmitting device can be operated while the vehicle is running. The vertical vibration of the overhead wire at the position of the rear pantograph is calculated from the vertical vibration of the overhead wire measured by the transmitting device by a computer to control one or both of the pushing force of the rear pantograph and the height of the pantograph.

As an example, a case of having two pantographs in the knitting will be explained. A plurality of laser transmitting / receiving devices are arranged between the front (top) pantograph and the rear pantograph, and the laser is connected to the overhead wire. The vertical vibration velocity of the overhead line at that position is measured by firing the target, and the vibration waveform of the overhead line is calculated by the computer mounted on the vehicle from the multiple measured values by multiple laser receivers and transmitters. The vertical vibration speed of the overhead line at the position of the pantograph and the displacement are predicted to change one or both of the push-up force and the pantograph height of the rear pantograph so as to follow the overhead line.

[Action]

The action is to measure the speed of vertical vibration and overhead displacement of the overhead line at the point by a laser transmitter / receiver installed immediately after the front pantograph, and at the same time, a laser transmitter / receiver placed immediately before the rear pantograph. The vertical vibration velocity and the vertical displacement of the overhead line at that point are measured by using the four measured values and the wave propagation velocity and vehicle speed of the overhead line, which are known values of the overhead line system used. The vertical vibration waveform is calculated by a computer, and the vertical vibration speed and vertical displacement of the overhead line at the position of the rear pantograph are predicted from the calculated values, and the pushing force of the rear pantograph, the displacement in the height direction, and an appropriate value The pantograph at the rear is controlled to follow the overhead line without fail.

An embodiment of the present invention will be described below with reference to the drawings.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of an active control system for a pantograph of the present invention, in which the same reference numerals as those in FIG. 2 indicate the same parts or parts having the same function. In addition,
In order to simplify the description, a case where there are two pantographs in one formation will be described.

In FIG. 1, reference numerals 4 and 4'indicate laser reference transmitters / receivers installed between the front pantograph 2 and the rear pantograph 2'in the vicinity of the front and rear pantographs, respectively. Four,
Lasers are respectively emitted from the 4'to the overhead line 3 and the vertical vibration velocity and the vertical displacement of the overhead line 3 located in the sky are measured. From this measured value, the vehicle speed, and the value of the wave propagation velocity of the overhead line 3, the vertical vibration waveform of the overhead line 3'is determined by an on-vehicle computer (not shown), and the vertical vibration speed of the overhead line 3 at the position of the pantograph 2'at the rear is calculated. The displacement is predicted and the pushing force and height of the rear pantograph 2'are controlled to appropriate values. This is shown in a block diagram in FIG. As shown in FIG. 5, the control system of the pantograph used in the pantograph active control system of the present invention calculates signals from the detection system (laser receiving / transmitting devices 4, 4 ', measuring device 5), that is, a memory. 6 is input. In the memory 6, overhead wire vertical spring constants as known overhead wire data, running conditions such as wave propagation speed, vehicle speed, and distance from the preceding pantograph as basic data,
Furthermore, in order to improve accuracy and other factors, for example, the inclination, vertical movement, vertical acceleration, vertical spring constant of the vehicle body, vertical velocity of the vehicle body, wind speed, wind direction, etc. are stored in memory, and calculations are performed by the built-in computer. Through the pantograph lifting / lowering control device 7 as a calculation system, the speed and the vertical displacement of the overhead line,
It is output to the pantograph lifting means 2, 2'of the operation system. Here, the pantograph is operated to increase or decrease the pushing force or the height.

Specifically, the air pressure is increased or decreased when the pantograph moves up and down by air pressure, and the height is increased or decreased when the height of the pantograph is regulated electrically.

〔The invention's effect〕

As described above, according to the present invention, the vertical vibration displacement of the overhead wire 3 excited by the passage of the front pantograph 2 by the laser transmitting / receiving device is measured, and the measured value is used to measure the pushing force of the rear pantograph 2 '. By properly controlling the height of the pantograph, the rear pantograph 2'can be made to follow the overhead line 3 without fail, so that the active control current collecting system of the present invention allows the rear pantograph 2'to operate.
The current collection efficiency of can be greatly improved, and it has a great effect on the improvement of the current collection efficiency and the train speed of the train as a whole.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing an example of the prior art, and FIG. 3 is a vertical displacement of an overhead line excited by a pantograph at the front of a conventional train running. FIG. 4 is a state diagram showing an example, and FIG. 4 is a characteristic diagram showing a difference in the contact release rate between the front pantograph and the rear pantograph. FIG. 5 is a block diagram of the present invention. 1 ... Vehicle, 2, 2 '... Pantograph, 3 ... Overhead line, 4,
4 '... Laser receiver / transmitter.

Claims (1)

[Claims] 1. An active control system for a pantograph, comprising a laser receiving / transmitting device (4, 4 '), a measuring device (5), a computing device (6), and a pantograph lifting / lowering control device (7), The laser transmitter / receiver (4, 4 ') is installed near the pantographs (2), (2') on the roof of the vehicle body and emits a laser toward the overhead wire to detect the reflected light. The measuring device (5) inputs the detection signal of the laser transmitting / receiving device (4, 4 ') and measures the vertical displacement and the vertical speed of the overhead line, and the arithmetic device (6) outputs the measuring device (5). Input, and calculate the vibration waveform of the overhead line from the data of the overhead line-related data that has been entered in advance and the distance between the running condition and the front pantograph, and predict the overhead wire vertical velocity and overhead wire vertical displacement at the position of the rear pantograph, The pantograph lifting control device (7) An active control system for a pantograph, which inputs data from a computing device (6) and outputs a control command for giving a desired lifting operation to a predetermined pantograph (2, 2 ').