SU1399190A1 - Arrangement for power supply of railway car - Google Patents

Abstract

This invention relates to railway transport. The purpose of the invention is to increase reliability. The car power supply device comprises an alternator I alternator, a series-connected uncontrolled rectifier 2 and a voltage regulator 6, made on thyristors 4, 5, the control electrodes of which through amplifiers 8, 9 are connected with pulse-width modulators U, 11, to each of which are connected through comparators 12, 14 current sensors 13 and battery voltage 15, ambient temperature sensor 16 and sawtooth block 17 synchronized through input filter 20, limiting unit 19 voltage and trigger generator 18 of the additional winding 1. 1-yl. with S (L

Description

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This invention relates to railway transport.

The purpose of the invention is to increase reliability.

The drawing shows a block of what device for power supply of the car.

The device contains a generator 1, the main winding of which is connected to the input of the rectifier 2, supplying the load 3. The extreme leads of the additional winding of the generator 1 are connected to the anodes of the thyristors 4, 5 of the regulator 6, for example, the cathodes of which are connected to the positive voltage of the battery 7 The control electrodes of the thyristors 4, 5 through amplifiers 8, 9 pulses are connected to the pulse-width modulators I) and 1 1, each of which are connected through the comparator 12 to the sensor 13 of the battery current, and through the comparator 14 sensor 15 eg zhepi Battery and temperature sensor 16 ambient; A saw-voltage block 17 connected via a trigger 18, a voltage-limiting block 19 and a power supply terminal; 1 20 20 to an additional winding of the generator 1 is directly connected to each of the Pi-pulsed modulators 10 and 11; the switch 21 is made on connected in series closing 22 and breaker 23 contacts. The opening contact 23 of the switch is bounded by a diode 24.

The device works as follows.

When the generator I is not operating or its rotational speed is low, the load 3 is powered by the battery 7 through the disconnecting contact of the switch 21.

When a certain frequency of rotation of the generator 1 is reached, the opening contact 23 opens, and the closing 22 closes. At the same time, the load 3 is powered by the main rectifier 2, and from the series-connected main rectifier 2 and the voltage regulator 6 ocyniecT-, the battery charge is regulated according to a given law. Diode 24 provides a charge current circuit for a battery at the time of the opening of disconnecting contact 23 and in transient modes when the voltage at the output of the main rectifier 2 increases.

The thyristor control unit of the additional rectifier 4 carries out their phase control, ensuring that the initial charge current of the depleted secondary battery is limited at a predetermined level, and then, as it is charged, it maintains a predetermined level of charging voltage of the secondary battery. In this case, the final voltage of the charging battery and battery will automatically change as a function of the ambient temperature according to a given law.

The alternating voltage of the downstream winding of the generator 1 is applied to the inlet filter 20, which serves to smooth out} 1 and at its non-sinusoidal form.

The smoothed voltage is assigned to block 19, which limits its amplitude, and then to trigger 18, which forms square voltage pulses synchronized with the frequency of the alternating voltage generator 1. Square voltage pulses from the output of trigger 18 control the operation of block 17 The saw-tooth voltage, the output voltage of which is supplied to the 1-pulse modulators 10 and 11. In addition to the saw-tooth voltage, each of them receives the output signal from the comparators 14 and 12.

The computer | 12 ator 12 V1,11) abuts the signal ;, about 110.1tsiony deviation of the battery charge current; 1 torus battery from the specified value, and the comparator 14 signal proportional to the voltage (the voltage of the battery, 1 torus) taking into account the ambient temperature.

All signals. 1s of pulse-width modulators are amplified and controlled by

thyristor bots 4 and 5.

Claims (1)

Invention Formula 0 A car power supply device containing an alternator with two windings, one of which is connected to an uncontrolled rectifier, and two terminals of the other winding are connected to one of the regulator pins for the same} 1i, the other pin of which is connected to one of the pins of the switch, 5 connected in series of closing and opening contacts, and to the other output of which is connected the third output of another generator winding, battery mute, one of the terminals of which is connected to one of the terminals of the uncontrolled rectifier, the ambient temperature sensor environment, current and voltage of the battery, characterized in that, in order to increase reliability, it is equipped with a shunt diode, and the voltage regulator is high on the thyristors, the control unit of which is connected to the controls, 1 u- electrodes and thyristor-pulsed pulse modulators, and comparators connected in series unit pi. A voltage, a trigger, a block and a filter and a filter, the last of which is connected to the outermost terminals of another generator winding, and the inputs of each tweeter-pulse modulator are connected to the outputs of the sawtooth and comparator, one of which connected to the output of the current sensor, and the other to the outputs of the voltage sensors and temperature) atur1.1 of the environment, the apods of the thyristors and their connection point The cathodes are, respectively, one and the other of the Nagfu regulator. to which another battery terminal and cathode are connected; the diode, the anode of which is connected to the middle output of the switch, to which another output of the uncontrollable terminal is connected.