SU1390078A1 - Device for controlling voltage of diesel locomotive traction generator - Google Patents

Abstract

This invention relates to a vehicle; and can be used on diesel locomotives with electric power transmission. The purpose of the invention is to improve accuracy. The device contains excitation current regulator 1. one input is connected to the output. the dU block 2 sets the excitation current, and the other to the output of block 3 as compared, one of the inputs of which is connected to the output of sensor 4 of the generator voltage, the input of block 6 of boxing and the first input of the setpoint 5 of the intensity of the voltage change, and the output of the setting device 5, the second and third inputs of which are connected to the outputs of the block 6 boxing. The sensors of the current of the traction motors are respectively connected to the inputs of the minimum signal block 8, and the output is connected to the input of the functional converter 7, the output of which is connected to the fourth input of the setpoint 5, the output of which is used to measure the intensity of the rotation frequency change. shaft diesel. 1 il. with o (L

Description

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The invention relates to transport and can be used in diesel locomotives with electrical power transmission.

The purpose of the invention is to improve accuracy.

The drawing shows a block diagram of a device for regulating the voltage of a diesel locomotive generator,

The device consists of the regulator 1 of the excitation current of the traction generator, the inputs of which are connected to the output of the excitation current setting unit 2 connected to the current and voltage sensors, the traction generator and the frequency of rotation of the diesel engine (not shown), and the output of the comparison unit 3 connected inputs to the outputs of the sensor 4 of the voltage of the traction generator and the unit 5 of the intensity of voltage change; The output of the sensor 4 of the voltage is connected to the input of the blocking unit 6 and the first input of the unit 5, the second and third inputs of which are connected to the outputs of block 6 are boxed, and the fourth and fifth are respectively to the outputs of the functional converter 7, the input of which is connected. jg

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setter 5. Block 6 boxing performed on the relay with contacts 32 ir 33,

The functional converter 7 is provided on an operational amplifier 34 and a diode-resistor circuit connected to the amplifier inputs and consisting of a diode 35 and resistors 36-41. The terminals of the resistors 40 and 37 are respectively the output and the input of the functional converter 7,

The minimum signal extracting unit 8 is made on a resistor 42 connected to the bias source 43, and diodes 44-46, whose cathodes are connected to the outputs of the current motor current sensors. Round the connection point of the diodes 44-46 and the resistor 42 is the output of block 8,

The unit 9 for measuring the intensity of change in the frequency of rotation of the diesel shaft is made on operational amplifiers 47 and 48, the first of which operates in the integrator mode, and the second in the comparator mode, the time of the setting and diode-resistor circuits consisting of a capacitor 49, diodes 50-52 and resistors 53-62, the leads of resistor 55 and diode 51 are

with the output of the mini-0 allocation unit 8, respectively, the input and output of the blunded signal, and the intensity measurement unit 9 for changing the rotational speed of the diesel shaft, the input of which is connected to the diesel shaft rotational frequency sensor, and the inputs of the minimum signal extraction unit 8 are connected to the current sensors traction engines (not shown),

The voltage intensity setting unit 5 is made on an operational amplifier 10 operating in the comparator mode, resistors 11 and 12 are connected to the inputs, and an operational amplifier 13 working with the capacitor 14 connected to the inputs and integrator mode resistors 15 to the inputs. The output of amplifier 10 is connected to the inverted input of amplifier 13 of a diode-resistor circuit from diodes 16 and 17 and resistors 18-22. Resistors 23 and 24 are connected to the connection point of resistors 20 and 22. The driving circuit is made on a capacitor 25, resistors 26 -29 and separation diodes 30. and 31. Conclusions. resistors 12, 27, 21, 24 and 23 are the first, second, third, fourth and fifth inputs, respectively.

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The device for regulating the voltage of the locomotive traction generator operates as follows.

When operating at a predetermined frequency of rotation of the diesel shaft, as the voltage of the thrust generator is increased, the voltage variation intensity zadatggik 5 generates a signal that determines the maximum intensity of the voltage rise at each time point. This buildup rate is determined by the currents of the traction motors. When a pair of wheelsets occurs and the voltage of the generator is rising at a rate exceeding the rate of increase of the signal at the output of the setpoint generator 5, the resultant signal of the comparison unit 3 controls the excitation current. In the case of blocking unit 6, under the action of a signal at the output of setpoint generator 5, the generator voltage initially stabilizes and then decreases exponentially. In the event of a decrease in the generator voltage, the signal at the output of the amplifiers 10 changes sign and recharges

input and output, respectively

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The device for regulating the voltage of the locomotive traction generator operates as follows.

When operating at a predetermined frequency of rotation of the diesel shaft, as the voltage of the thrust generator is increased, the voltage variation intensity zadatggik 5 generates a signal that determines the maximum intensity of the voltage rise at each time point. This buildup rate is determined by the currents of the traction motors. When a pair of wheelsets occurs and the voltage of the generator is rising at a rate exceeding the rate of increase of the signal at the output of the setpoint generator 5, the resultant signal of the comparison unit 3 controls the excitation current. In the case of blocking unit 6, under the action of a signal at the output of setpoint generator 5, the generator voltage initially stabilizes and then decreases exponentially. In the event of a decrease in the generator voltage, the signal at the output of the amplifiers 10 changes sign and recharges

the capacitor 14 occurs along the diode 16 circuit - resistor 18.

The device circuitry uses two closing relay box groups. During its operation and closing the contacts of the block 6, the output signal of the setpoint device 5 is maintained at the level corresponding to the moment of contact closure. In addition, if the contacts are in the closed state for a sufficiently long time, the capacitor 25 is recharged until the voltage of the diode 31 is broken, thus providing the discharge of the capacitor 14. When the contacts of the unit 6 are discharged, the capacitor 25 is discharged 30 - resistor 28 with a small time constant.

Signals proportional to the motor currents are input to the minimum signal extracting unit 8. If the currents on the resistor 42 are not equal, the signal corresponding to the minimum of the input is extracted.

In order to increase the sensitivity of the setting device 5 to the change in the current flow, the functional converter

7 forms at its output a signal for setting a change in the rate of increase of the voltage of the generator in proportion to the change in the minimum current of the motors in the working part of the external characteristic.

The operation of the device can be divided into two stages - this is operation at a given frequency of rotation of the diesel shaft, i.e. transmit power and power mode.

In the first case, the device operates as follows.

As the voltage of the voltage generator increases, the output signal of the voltage sensor 4 changes. The sensor 5 generates a signal that determines the maximum intensity of the voltage rise at each time point. Moreover, the intensity of the increase in the signal at the output of the setting device 5 is determined by the currents of the traction motors

8, block 3, this signal is compared with the output of sensor 4. When a pair of wheel sets occurs and the generator voltage increases with a rate higher than the rate of increase of the signal at the output of the setpoint generator 5, the resulting signal of the comparison unit 3 controls the generator excitation current. With sufficient prokal |

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The operation of the wheelsets and the operation of the blocking unit 6, its action in the setting unit 5 leads first to the stabilization of the magnitude of the voltage, and then to its decrease according to the exponential law.

When the driver controller positions are set and the frequency of rotation of the diesel shaft exceeds the reference intensity by a unit of time, due to the inclusion of a parallel voltage control loop, a signal appears at the output of block 9, contributing to an increase in the intensity of the voltage of the generator, thereby loading the diesel and the error at the output of block 9. In established modes, the signal of block 9 is absent. When blocking occurs in these modes, the increased intensity of the generator voltage rise is compensated by a drop in the signal at the output of the functional converter 7 and the action of the blocking unit 6.

With an increase in the shaft rotation frequency, the signal at the output of the amplifier 47 of the block 9 changes linearly. The angular coefficient of the temporal characteristic is determined by the rate of increase in the power of the diesel generator set, defined by the regulatory documents of the enterprise manufacturer. When the signal at the input of block 9 decreases, the signal at the output of the Amplifier 47 changes synchronously. A more intense increase in the signal at the input of the block 9 than that determined by the signal at the output of the amplifier 47, causes the error signal at the output of the amplifier 48.

Claims (1)

Invention Formula A device for regulating the voltage of the traction generator of heat pumping, which contains the regulator of the excitation current of the traction generator, one input of which is connected to the output of the unit for specifying the excitation current connected by the inputs to the current sensors and voltage of the diesel generator and the frequency of rotation of the diesel shaft, and the other is connected to the output of the comparator unit, connected by inputs to the outputs of the unit for the intensity control of the voltage change and the voltage sensor, with the last of which is connected to the input of the box unit 13900786 vani and the first input of the unit of the intensity control of the voltage variation of the function of the voltage variation, the secondary transducer and the unit and the third inputs of which are connected to measure the intensity of change to the outputs of the blocking unit, and the unit frequency of rotation of the diesel shaft, the input the minimum signal, about t -which is connected to the frequency sensor characterized by the fact that the diesel shaft collapses, and the inputs To improve accuracy, it provides the minimum signal block but current sensors of the traction motors are connected to the sensors of the currents of the traction motors and connected outputs to the fourth Q engines, and the output is to the input to the function and the fifth inputs of the setpoint adjuster of the international converter.