SU1438979A1 - Arrangement for controlling traction electric drive of underground electric trains - Google Patents

Abstract

The invention relates to transport, in particular, to devices for controlling the traction electric drive of metropolitan cars, and is aimed at improving reliability. The thyristor converter 1 regulates the voltage on the traction motors 2.3 of each car, arriving from the contact network through the current collectors 4-7. With the disappearance of the current on one of the first along the movement of the current collectors 4 or 5, fixed respectively by sensors 15 or 16, the high level signal on the elements 17,11,10,9 disappears, and the control unit 14 zak-; The thyristor converter I is burrowing, disconnecting traction motors from the mains. If the current section is overlapped, then a high level signal from the voltage sensor 8 all the time goes to element 9, and when current appears on current collectors 4 or 5, the thyristor converter opens and supplies voltage to the traction motors. For an intermediate car (all after the lead head), information about the overlapped current separation is supplied from sensor 8 of the voltage of the head car, and converters on intermediate cars do not disconnect the electric motors. In the case of a non-overlapping current section, the output signal of the low-level head car sensor 8 and the intermediate car thyristor converter disconnect its traction motors even before the run-off current section, thus providing a current-free passage of the current section. 1 il. i SP 4ib O9 00 WITH (; O

Description

The invention relates to a transport, in particular, to devices for controlling a traction motorized metro cars.

The purpose of the invention is reliability.

The drawing shows a block diagram of the proposed device for a three-car metro train.

The device contains a thyristor converter 1 in each car, which in series with the traction motors 2 and 3 is connected to the current collectors 4-7, located on the KOHds of the car from the right and left sides (on tele dials). A sensor is connected to the common circuit of current collectors 4-7. voltage, the output of which is connected to one of the inputs of the element AND 9. To the other input of the element AND 9 is connected the output of the element OR 10, the inputs of which are connected to the outputs of the elements 11 and 12. One of the inputs of the elements 11 and 12 is connected to the outputs motion direction relay 13. The output of the element And 9 is connected to the input of the control unit 14. On the head and tail cars of the train (extreme according to the drawing), current sensors 15 and 16 are connected to the extreme current collectors (located on the first and last train carriages) connected to the inputs of the element OR 17, the output of which is connected to the other input of the element 11 11. Another input element And 12, as well as another input element And 11 on an intermediate carriage are connected to voltage sensors 8 located on adjacent cars. The current sensors 15 and 16 can be made in the form of current collector position sensors, which, occupying one of the extreme positions when the current collector comes off the contact rail, indicate that there is no current on it.

The device works as follows:

at once.

Three modes of operation are possible for the device: in the absence of a current divider and in the presence of overlapping and non-overlapping current separations.

In the absence of a current divider, the current sensor 15 or 16 on the head car is leftmost according to the drawing) fixes the working position of the current collector 4 or 5. The signal from sensor 15 or 16 through the element OR 17 goes to element 11.

direction Forward, at the output of voltage relay 13, a high level signal is present. Under the action of the signals from the element OR 17 and the relay 13, the element 11 forms a high level signal, which through the element OR 10 goes to one of the inputs of the element 9. To the other input of the element 9 it receives a signal from the sensor 8, which detects the presence of voltage coming from the contact network to the current receivers of the head car. Under the action of the input signals, the element AND 9 forms a high-level output signal, which is fed to the control unit 14. Under the action of this signal, the unit 14 turns on and carries out a pulse control of the thyristor converter 1 of the current of the traction motors in accordance with the required mode of starting or decelerating the car.

On an intermediate carriage, element 11 also detects the presence of signals at the output of the relay 13 and at the output of the voltage sensor 8 at the head car. The output signal of the element And 11 through the element OR 10 is fed to the element And 9, the other input of which is affected by the signal from the sensor 8 of the voltage of this car. Under the influence of these signals, the element 9 permits impulse operation of the control unit 14 on the car.

The tail car when moving in the direction of Forward works as an intermediate.

When a car reaches the current section, the position of the current collector 4 (or 5) i first changes. This state is detected by the sensor 15 (or 16), and a high level signal disappears at its output. As a result, the output signals of the elements 17,11,10 and 9 and the control unit 14 converts the converter 1 to the closed state, which disconnects the traction motors 2 and 3 from the contact network.

If the current section is overlapped, then the high level signal does not disappear at the output of the voltage sensor 8, and when the current collectors 4 and 5 run onto the contact rail, the output signals of elements 17, 11, 10 and 9 are restored and the control unit 14 converts the converter 1 into a pulse mode of operation.

31438979

The output signal of the sensor 8 with the head

, his car enters and at the entrance of the element And 11-intermediate car. Since this signal does not disappear with the overcurrent section, the intermediate carriage even before its hitting: yes, it already receives information on the current section. mation about the type of current divisor. The control elements of the car retain their state, and the control system operates in the normal mode of pulse control of the traction motors. The tail car also works in a similar way, receiving a signal from sensor 8 of the previous car.

If the current divisor is non-overlapping, then at the exit of the current collectors 6 and 7 of the head car from the contact relay. When the train is moving in the Back direction, the car on the right-hand side is the head car and the intermediate car is the rest. In this case, a high level signal is present at the output 6 of the directional relay 13. The rest of the device is similar to that described.

Claims (1)

Apparatus of the Invention A device for controlling a traction electric drive of metro cars containing on the head and tail 15 In the first train cars, the current sensors of the first in the direction of movement of the current collectors, the outputs of which are connected to the inputs of one of the OR elements, and in each car of the train, the relay is directed. The output signal of the sensor 8 is 20 and the movement and voltage sensors are sa. As a result, on intermediate current collectors connected to one When the train is moving in the Back direction, the car on the drawing is at the extreme right, and the intermediate ones are the rest. In this case, a high level signal is present at the output 6 of the directional relay 13. The rest of the device is similar to that described. Apparatus of the Invention A device for controlling a traction motorized metro carriage, comprising on the head and tail section 15 20 Elements 11, 10, 9, 14, and 1 are transferred to the closed state, disconnecting in advance, even before the collision, the traction motors from the contact network. This provides a safe, i.e. currentless, hitting the intermediate car on the current separation. When the current rail collectors of the intermediate car get off the contact rail, the output signal of its voltage sensor 8 disappears. As a result on the tail car, the elements 41.40, 9.14 and 1 are also transferred to the closed state, and the tail car is disconnected from the contact network in advance. The normal operation of the equipment of the cars when passing through the non-overlapping current separation occurs automatically: on the head car when driving over the contact rail of the rear current collectors 6 and 7, and on subsequent cars - the front current collectors 4 and 5. from the inputs of the corresponding elements And, to the other inputs of which are connected-. here are the outputs of the other elements OR outputs - inputs of the control units of the thyristor converters corresponding to the whole train carriage, characterized in that, in order to increase reliability, it is equipped with additional elements And two for each car, the outputs of which are connected to the inputs of other OR elements, while one of the inputs of one and another additional element AND is connected to the outputs of the driving direction relay, the other input of one of the elements I to the voltage sensor of the current collectors of the adjacent car and another input of another of the elements Both on the head and tail cars, they are connected to the exit of one of the OR elements, and on the other cars - to the sensor of the current collectors of the neighboring car.