SU1468790A1 - Control device for electric braking of a.c. electric rolling stock - Google Patents

Abstract

The invention relates to devices used on an electromotive composition with an automatic regenerative braking control system with independent driving of traction machines, and allows improving the reliability of the device, as well as

Description

one

The invention relates to electric transport, in particular, to an electroplating composition: with independent air motor and automatically; management by regenerative braking.

The purpose of the invention is to increase reliability and accuracy.

The drawing shows a functional block diagram of the proposed device.

A device for controlling electric braking of an alternating current rolling stock contains a thyristor converter 1 in the power supply circuit of the main winding 2 of a thrust echo motor connected by a control input to the output of a phase-shifting unit 3, the input of which is connected to the output of a controlled function converter 4 connected by a control an input with an output, an adder 5, and an information input with an output of a regulator; a current of the crust winding, the input of which is go- connected to the output of a comparison unit 7, connected inputs, respectively, but with the output of the setting device 8 and the current sensor core winding 2 tons of govogo

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2 h: a pectromotor 5 whose excitation winding 10 is connected to a source. The power supply via a transformer, 11 and controlled by you, pa r 12, connected by a control input to the output of the phase shifting unit 185, whose input is connected to the output of the current regulator 14 of the winding excitation, 5, connected to the output of the comparison unit 15, inputs which are connected respectively to the output of the sensor 16 of the winding current 10 of the exciting motor, and to the output of the voltage suppressor 17 connected by an input to the output of the division unit 18 5 whose inputs are connected respectively to the output of the sensor 19 of the rotation frequency electric motor with the output of the adder 20, connected by inputs respectively to the output of the regulator / l torus 6 current. the root winding and to the output of the voltage sensor 21 21 associated with one of the inputs of the capacitor; 1, the device 5; To the other input of which is connected via an amplifier 22, the ESPSOD of the rotation frequency sensor 19 t - i-oBoro electric motor 5, in this case, a 23-second resistor is connected to the power supply circuit of the main winding of the 2-volt electric motor.

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The control device works as follows.

The signal from setpoint 8 sets the current value of the core winding to 5 comparison unit 7, where it is compared with a signal proportional to the true current value coming from the current sensor 9 core, At the output of comparison unit 7, an error signal is output and sent to the regulator 6, a current of the core, where it is converted into a signal proportional to the required value of the current of the root winding. The output signal of the regulator-6 current core arrives at the first. the input of the adder 20 and the main input of the controlled functional converter 4, the control input of which receives the output signal of the adder 5. The output signal of the adder 5 is formed as a result of an algebraic sum taken with the plus sign output of the sensor 21 for the supply voltage of the thyristor converter 1 and with a minus sign of the output signal of the amplifier 22, to the input of which the output signal of the engine speed sensor 10 is supplied. Thus, the output signal of amplifier 22 is obtained as a result. amplification of the output signal of the engine speed sensor 19, feo, of a value proportional to the product of the rotational speed and the nominal value of the excitation current. The algebraic sum of the signals received at the output of the adder 5 is fed to the control input of the functional transmitter 4, the signal from 40 outputs from the output of the regulator 6 of the main current to the main input of the functional converter 4 is less than the absolute value of the signal coming from the output the adder 5 to the control unit equals the input of the functional converter 4, its output signal is zero. At the same time, the output of the adder 20, the second input of which receives the output signal of the sensor 21 of the supply voltage thyristor-converter Summoner 1, the sum of the signals is obtained. This sum of signals arrives at the first input of the unit (Is division, in which it is divided into a signal proportional to the rotation frequency and received at its second input from the output of the engine speed sensor 19. The signal proportional to 10

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5 35 - 40 dz 8790

private to the division, obtained at the output of the block 18 division, flows through the limiter 17 voltage

 on one of the inputs of block 15 comparison. As long as the signal at the output of dividing unit 18 is less than the level of the limiter on the voltage limiter 17, the excitation current setting signal at the output of the voltage suppressor 17 is equal to it in: one signal, V. the comparison unit 15, the excitation current reference signal is compared with the sensor output signal 1b current proportional to the true value of the excitation current. deni At the output of the comparator unit 15, the signal of the error is extracted and fed to the current regulator 14 at the gear, where it is converted into a signal, pro-. portioned to the required value of the excitation current. This signal arrives at the phase-shifting unit 13, at the output of which control pulses are generated, the phase of which is determined by the magnitude of the specified current value, excitation, the control pulse is fed to the control input of generator 12, which increases the voltage on the excitation winding 10,

After the excitation current of the traction motor reaches the nominal value, and the output signal of the voltage suppressor 17 is the limiting level, the change in the excitation current stops and the output voltage of the thyristor converter 1 changes, Indeed, as soon as the value of the signal is proportional to the required current value and the current of the root winding coming from the output of the current regulator 6 to the main input of the functional converter 4 becomes larger than the absolute value of the signal coming from the output adder 5 to the control input of the converter 4, the last entry into operation. At its output, a signal appears, which is fed to the phase-shifting unit 3. At the output of this unit, control pulses are generated, the phase of which is determined by the firing angle of the thyristor converter 1 necessary to maintain. the extinction angle with varying switching angle, as well as the opening angle of the thyristors required for adjusting the output voltage of the thyristor converter 1 The control pulses fed to its control input inverts the constant voltage of the traction motor operating in the generator mode into alternating,

Claims (1)

Invention Formula A device for controlling electric braking of an AC electric motor containing a Thyristor converter in the power supply circuit of the main winding of the traction motor connected by a control input to the output of the first phase-shifting unit whose input is connected to the output of a function converter connected by an information input to the output of the current regulator of the root pass loop, connected by the input to the output of one of the comparison units, the inputs of which are connected respectively to the output of the setpoint device and the current sensor of the main winding of the traction motor, the excitation winding of which is connected to the source of purchase through a controlled rectifier, the control input of which is connected to the output of the second ten a phase-shifting unit connected by an input to an output of an excitation winding current regulator connected by an input to an output of a second comparator unit whose I / O is connected respectively to an output of an excitation winding current sensor and an output of a voltage limiter, characterized in that accuracy, it is equipped with two combiners, a dividing unit, a rotational speed sensor of the traction motor, a voltage sensor, and a functional converter is made controlled, the control input of which is connected one with the output of the first adder, the inputs of which are connected respectively to the output of the voltage sensor and through usi20 25 thirty A motor connected to the output of the rotational speed sensor of the traction motor connected to one of the inputs of the division unit, the other input of which is connected to the output of the second adder connected by inputs respectively to the output of the voltage sensor and the output of the current regulator of the core winding to the input of the voltage limiter. a phase-shifting unit connected by an input to an output of an excitation winding current regulator connected by an input to an output of a second comparator unit whose I / O is connected respectively to an output of an excitation winding current sensor and an output of a voltage limiter, characterized in that accuracy, it is equipped with two combiners, a dividing unit, a rotational frequency sensor of the traction motor, a voltage sensor, and a functional converter is made controlled, the control input of which is connected not with the output of the first adder, the inputs of which are connected respectively to the output of the voltage sensor and through usi0 25 thirty A motor connected to the output of the rotational speed sensor of the traction motor connected to one of the inputs of the division unit, the other input of which is connected to the output of the second adder connected by inputs respectively to the output of the voltage sensor and the output of the current regulator of the core winding to the input of the voltage limiter.