SU1569256A1 - Apparatus for charging diesel locomotive storage battery - Google Patents

Abstract

The invention relates to transport, in particular to the transmission of electricity to auxiliary electrical equipment of diesel locomotives. The aim of the invention is to increase reliability. The device comprises a contactor 14, separation diodes 15 and 16, a DC electric generator with a winding 3 of independent excitation, a current regulator 4 of this winding, a reactor 13 connected in series and a battery voltage regulator 9, the connection point of which is through diode 16 is connected to the positive terminal of the battery 8. 1 Il.

Description

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The invention relates to the field of electric power transmission to auxiliary equipment of diesel locomotives, in particular from an auxiliary electric machine generator of direct voltage to a battery.

The purpose of the invention is to increase reliability.

The drawing shows a block diagram of a device for charging a battery of a locomotive.

The device comprises a DC generator 1 with a crust winding 2 and a winding 3 of independent excitation, a regulator 4 of the winding current 3, comprising a voltage monitoring unit 5 of the crust winding 2, an analog conversion unit 6 and a pulse control unit 7, a battery 8 , battery charge voltage regulator 9, including battery voltage control unit 8, analog conversion unit 11 and pulse control unit 12, reactor 13, contactor contacts 14 and isolation diodes 15 and 16 connected by cathodes and positive A output of the secondary battery 8, and the reverse diode 17, the shunt winding 3 excitation.

The device works as follows.

When the diesel shaft and, accordingly, the bark of the generator 1 does not rotate, the voltage at the terminals of the core winding 2 is absent and the battery 8 is not charged. In this case, the separation diodes 15 and 16 exclude the discharge of the batteries 8 through the corona winding 2 of the generator 1. The contacts 14 of the contactor are open and the voltage of the battery 8 is not supplied to the functional blocks 6, 7 and 10, 11 of the regulators 4 and 9.

After starting the diesel, its shaft and the bark of the generator 1 begin to rotate, the contacts 14 of the contactor close and the voltage of the battery 8 goes to the functional blocks 6, 7 and 10, 11 of the regulators 4 and 9. Then, depending on the frequency of rotation of the shaft and correspondingly generator 1 device can operate in two modes. In the mode corresponding to the mode of the diesel locomotive, the bark of the generator 1 rotates with the frequency at which the voltage of the core winding 2 has a value sufficient to charge the battery 8. This mode is characterized by the following sequence of operation of the device.

After the contactor 14 of the contactor 14 is closed, the regulator 4 begins to work. After that, a current flows through the winding 3 of the generator 1 and a gradual voltage appears at the terminals of the crust winding 2. This voltage is applied to the battery 8 and the main winding 2, diode 15, through the circuit 8, the battery 8 flows a constant current, charging the battery 8. The circuit that is formed by the reactor 13

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and separation diode 16, the current does not flow.

In this mode, the regulator 9 does not work, the regulator 4 stabilizes the voltage of the crustal winding 2 when the rotational speed of the generator core 1 changes by adjusting the current in its winding 3. In block 5 of the control voltage of the generator 1, the stabilized voltage is compared to its reference voltage a value, in which the threshold voltage of the zener diodes is normally used. The compared voltage is fed to the input of the unit 5.

At its output, an amplified difference of the compared voltages is obtained, which is fed to the input of the analog conversion unit 6. This unit converts the constant voltage of a variable into the time interval between two periodic sequences of current pulses. The current pulses generated by block 6 are fed from its output to the input of block 7 of pulse control, which is a pulse-width-controlled thyristor switch.

A periodic sequence of voltage pulses is applied to the winding 3, the average value of which is proportional to the time interval that is formed by block 6. The larger (smaller) the difference between the compared voltages in block 5, the smaller (longer) the time interval generated by block 6 and accordingly less (more) the average value of the voltage and current of the winding 3 of the generator 1. This allows to obtain the effect of negative feedback, which ensures the stabilization of the voltage of the generator 1. Thanks to the ability of block 5 to increase the voltage, the difference of the voltages compared in it is of small value, which ensures sufficient accuracy for the battery 8 to stabilize the voltage of the generator 1.

When the diesel locomotive goes into idle mode with reduced rpm, the speed of rotation of the generator core 1 decreases to a value at which the controller 4 does not stabilize the voltage of generator 1 at the level required to charge battery 8. The voltage of generator 1 decreases and becomes less battery 8. Its voltage also decreases, but by a smaller value. This leads to the fact that the regulator 9 starts to work. The voltage of the battery 8, at which the regulator 9 begins to work, is slightly lower than the stabilization level provided by the regulator 4, and therefore is sufficient to charge the battery 8.

When the regulator 9 is operating, the voltage of the battery 8 is maintained at a level that ensures its charge. The regulator 9 operates similarly to the regulator 4. Blocks 10-12

Lore 9 perform the same functions as blocks 5-7, respectively, of the controller 4.

In this mode, the device operates as follows. With a closed circuit of block 12 of regulator 9, the voltage of generator 1 is applied to reactor 13. The voltage of this reactor has polarity, which is shown in the drawing, and an increasing current flows in its circuit. In this case, the separation diode 16 prevents the battery 8 from being short-circuited through the circuit of the regulator block 12 9.

After the opening of the circuit of the block 12, the current from its circuit passes into the circuit formed by the diode 16 and the batteries 8, and begins to decrease. In this case, the voltage of the reactor 13 has a polarity opposite to that shown in the drawing, and is collapsed with the voltage of the generator 1. As a result, a voltage is applied to the battery 8, which is greater than the voltage of the generator 1 and ensures the flow of the current charging the battery 8.

When the next circuit of the block 12 is closed, the current from the circuit formed by the diode 16 and the battery 8 goes back to the circuit of the block 12 and starts to grow. In this case, the voltage of the reactor 13 is polar, which is shown in the drawing, the voltage of the battery 8 has a value greater than the voltage of the generator 1. After the next circuit of the block 12 of the regulator 9, the operation of the device repeats in the described sequence.

Thus, in this mode, the battery 8 is provided with periodic current pulses, the value of which is automatically adjusted, based on the results of the comparison in block 10 of the true voltage regulator 9 of the charging battery with its reference value, which is slightly less than the equivalent value of the block 5. Than the greater (less) the charge of the battery 8 and, accordingly, the unit 10, the voltage, the smaller (longer) the time interval formed by the unit 11, respectively, for a smaller (longer) time, unit 12 closes its center ten and smaller (greater) voltage of the 13sumir reactor

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With the voltage of the generator 1. This allows, taking into account the charge of the battery, to regulate the mode of its charge.

When the voltage of the generator 1 decreases or increases, the regulator blocks 10 and 11 change in a certain way the closing time of their circuit 12 and, accordingly, the voltage of the reactor 13, which is added to the voltage of the generator 1. This allows stabilizing the voltage at the poles of the charged battery 8, as is the case in the previously described mode.

When a diesel locomotive goes from idle mode with reduced speed to thrust mode, the rotation frequency of the generator core 1 and its voltage increase. As a result, the voltage of the battery 8 is increased by a small but sufficient amount to disconnect from the operation of the regulator 9. After that, the device operates in the first mode.

Claims (1)

Invention Formula A device for charging a battery of a locomotive containing a DC generator articulated with a diesel shaft, the excitation winding of which is connected to one of the pulse controllers connected to the battery to which the core winding of the generator is connected The control input of one of the pulse regulators is connected to one of the output windings of the generator core, and the other separating diode, characterized in that, in order to increase reliability, it is equipped with These are in series with a reactor and an additional pulse regulator, some of the terminals of which are connected to the terminals of the generator core winding, and others to the anode of another isolation diode connected by a cathode to one of the batteries of the battery, which is connected to the control input of another pulse regulator .