SU1493501A1 - Device for preventing spontaneous moving of vehicle - Google Patents

Abstract

The invention relates to devices for preventing spontaneous rolling of vehicles, is intended for rolling stock with traction motors and provides improved driving safety. A hysteresis phenomenon in the traction motor magnetic system is used to determine the onset of spontaneous rolling that differs from the scheduled start. The device contains a speed control unit made on the sensors of the voltage and current of the traction motor, which are zero-organs. The sensor outputs are connected to the trigger inputs directly and through the NOT, AND elements, the delay element and the exclusive OR element, and the trigger output is connected to the winding of the emergency braking relay. 1 hp ff, 1 ill.

Description

The invention is intended for rolling stock with traction motors, for example for electric locomotives, electric trains, trolley buses, as well as diesel locomotives and diesel trains with electric transmission, and can be used in electrified cranes, freight and passenger elevators to control the stationary lift loads or cabins.

The purpose of the invention is to increase traffic safety.

The drawing shows a functional block diagram of the device.

The device contains a speed control unit consisting of a voltage presence sensor I and a current sensor 2 of a current motor, the output of which is connected to one of the inputs of element 3 EXCLUSIVE OR and one of the inputs of element 4 AND, the other inputs of which are connected to output of item 5 is NOT,

connected by the input from the output of the sensor I voltage connected to one installation input of the trigger 6, another installation input which through the delay element 7 is connected with the output of the element 4 and the reset input of the trigger 6 is connected to the output element .. 3 EXCLUSIVE OR, and the trigger output is connected to the winding of the emergency braking relay 8. At the same time, sensors I and 2 are made on null organs.

The present invention utilizes the known hysteresis phenomenon in a traction motor magnetic system (not shown). Indeed, even in the absence of current, there is residual magnetic flux in the field windings, obs. Juvented by the presence of hysteresis in the magnetization curve of this system. Therefore, even when the chain of a motor is broken, its measles,

WITH

WITH

ate

in this residual magnetic field, emf is produced.

The scheme works as follows.

When stopping the vehicle

In order for the circuit to be safe and in the event of a break in the circuit of the voltage sensor 1, element 4 AND and delay element 7 are introduced into it. During start-up, the trans-voltage on the engine motor of the tailor means, if the circuit does not work, therefore, the output of sensor 1 is normal, some time after the voltage is zero, the zero signal that triggers the current sensor 2 and the element 3 EXCLUDES -chip 1 voltage The signal at the output of 1EEE OR holds the trigger 6 in the reset element 4 AND, appearing in this temporary state. In this case, the winding is re-m, less than the response time of the element 8 emergency braking receives 7 delay, so the transfer of the trigger power and braking does not occur. In one state will not occur.

In normal (controlled) start In case an open circuit occurs

vehicle is turned on by the voltage sensor 1, the output signal

traction motor, begins to go element 4 and in the Vits for all time switch-on current and sensor 2 current is triggered, jj traction engine, which will cause

In this case, the trigger 6 and after the quit-triggering of the delay element, the transfer

Pulling the voltage sensor 1 continues the trigger 6 in a single state and to hold on in the reset state deduced emergency braking,

by the current 2 sensor signal, I arrive-Thus, the proposed device

SHOULD through the element 3 EXCLUSIVE allows automatic detection and prevention of .20 rotate the spontaneous rolling of the transport when moving to the ramp on the output means. In addition, is

voltage sensor 1 remains a single signal until a full stop of the vehicle occurs. In this case, the trigger b continues to remain in the reset state, since for its installation on a dynamic input, the appearance of a pulse signal is required.

Thus, with normal operational safety with respect to an open circuit in the circuit of any sensitive element of its circuit.

Claims (1)

1. A device for preventing spontaneous movement of a vehicle with a traction motor, Vehicle trigger 6 is a speed control block, the block is always in the reset state, and for analysis and emergency brake relay, the coil of the relay is constantly receiving power. characterized by the fact that, in order to increase the spontaneous transfer of the safety trans- mission, the control unit of the load-carrying means to any direction is made on the sensors of the presence of the main engine of the motor and the current of the motor; Wits is different from zero, and the current in circuit 35 is an analysis unit — on the logic elements of the core. In this case, the work is NOT EXCLUDING OR and the trigger, only the voltage sensor 1 melts, and the output of the voltage sensor connected to one setup input of the trigger and to the input of the logic element NOT, the output of which is connected to one of the inputs of the logic element EXCLUSIVE OR, connected by another input to the output of the current presence sensor, and the output to the reset input of the trigger, to the output of which the winding of the current 2 is connected continues automatically emergency braking, include emergency braking in case 2. The device according to claim 1, characterized by spontaneous rolling, since in order for the analysis block to be equipped with the element, a zero signal is required at the output of the delay volume and the AND gate of the specified zero-body. In this case, the inputs of which are connected, respectively, will only occur falsely to the sensor outputs of the presence of current and van when the vehicle is started, the 50-juicy element is NOT, and the output through these switches is a safe element of delay. - Nym.Novochnuyu input trigger. The current 2 will remain in the zero state. Then, the trigger 6 by the leading edge of the output signal of the nanometer 1 sensor is set to one, the power supply to the relay coil 8 stops, which will lead to the start of emergency braking. This circuit with an open circuit in the data circuit In order for the circuit to be safe and with an open circuit, the circuit of the voltage sensor 1, element 4 I and delay element 7 are entered into it. When starting the vehicle. In addition, is safe against an open circuit in any sensitive element of its circuit. Invention Formula