SU1184709A1 - Device for running thyristor-pulse controllers of vehicle traction motors - Google Patents

Abstract

A DEVICE FOR CONTROLLING A TIRISTOR-PULSED CONTROLLER OF A VEHICLE DRIVE ENGINE, which contains a shaper of control pulses of regulators and a setting unit for its operation modes, which is connected to the control input of the generator, which is connected by an output source with a set of 22-hr, which is connected to the control unit, connected to the source, which is connected by a set of 18 beef motors connected to control inputs of controlled frequency generators connected by outputs to inputs of the second and third drivers pulses whose outputs are connected to one of the inputs of the corresponding triggers, the other inputs of which are connected to the output of the first pulse driver, and the outputs to the first inputs of the first, second, third and fourth elements, respectively, the second inputs of which are connected respectively to the output of the second and third drivers impulses, due to the fact that, in order to increase reliability, it is equipped with an additional trigger and an OR element, the inputs of the first of which are connected respectively to the output of the second and third elemeitov. And, and the inputs of the second - with the outputs (About the first and fourth, while the first output of the additional trigger is connected to the third input of the first and second elements And, and the second - the third input of the third and fourth elements And, while the inputs of the additional trigger are connected with 4 turns of the control driver impulse of the regulators, and the outputs of IDN elements - with its inputs.

Description

The invention relates to transport, in particular, to control devices for thyristor pulse controllers of the speed of the traction motor of a vehicle. The purpose of the invention is to increase reliability. FIG. 1 shows a block diagram of a device for regulating the thyristor-shmpulum regulators of heavy vehicle engines; Fig. 2 is a block diagram of a digital control device of a thyristor pulse controller. The device contains a mode dial executed on the control unit. I, connected by an output to the control input of the generator 2 of the reference frequency, connected by the output to the input of the pulse shaper 3, sensors 4 and 5 of the current of the hog motors connected to the control inputs of the generators. b and 7 frequencies l connected by outputs with formers of 8 and 9 pulses, the outputs of which are connected to the inputs of flip-flops 10, I1 connected by codes to one of the inputs of the AND 2-15 elements, the other inputs of the elements 12 and 15 are connected to the formers 9 and 8a of the elements And 13 and 14 to the output of the former 3. The device contains the elements OR 16, 17 and the trigger 18. The device (FIG. 2) contains a generator of 19 clock pulses connected to the clock counter 20, output; The dashes of which are intended for supplying two sequences of pulses to the main thyristors of the converter shifted relative to each other by 180 al-degrees. The clock counter outputs 21 are connected to one inputs of the descriptor 21, to the other inputs of which are connected the outputs of the reversible counter 22, whose inputs are the outputs of the elements OR 16 and 17. The device operates as follows. By a command coming from the controller 1 to the generator 2, a specific value of the reference reference frequency is set corresponding to the setpoint. Through the driver 3, the pulses arrive at one of the separator inputs of the flip-flops 10, 11 and at the same inputs of the elements 13, 14. Taking into account that at the initial moment of start the current B of the motors is absent, the shapers 9 and 8 do not work and the triggers 10, 11 are all the time in one position, giving, a unit to one input of elements AND 13, 14, to the other inputs of which control pulses are received with a maximum frequency. When a control pulse is fed from the digital control system to the input of the trigger 18, it is set in such a state that from its direct output the signal goes to the third inputs of the And 12, 13 elements, which allows the pulses to the input of the reversing counter 21 to pass through the input addition with a frequency corresponding to the frequency setpoint. After a half period, the trigger 16 changes its state in connection with the arrival at its other input of the trigger 18 of a pulse from the decoder 21 next to the thyristor of the second converter (not indicated). From the output of the trigger 18, the signal already arrives at the other elements AND 14, 15, which leads to the arrival of signals at the input 27 of the addition of the reversible counter 22. The incoming pulses at the input of the reversible counter 22 will lead to a change in its state and, accordingly, to a change in the fill factor converters. When voltage is applied to the load in the motor circuit, a current begins to flow, which leads to the appearance of a signal at the outputs of sensors 5.4 and, accordingly, to the operation of generators 7 and 6, whose frequency of operation is proportional to the motor current. Taking into account that the operation of two thyristor pulse converters is shifted in time, it is possible to use one reversible counter for two phases, setting a different state for each phase, which is realized in this device. So, when a control pulse is applied to the switching thyristors of one converter, the signal goes to trigger 18, setting it in such a state that the signal goes to elements II 12 and 13 of another channel, thereby ensuring the arrival of pulses to the addition or subtraction input of a reversible counter 22, giving it a state before switching on the switching thyristors of the second phase, corresponding to the mismatch of the value of the setpoint current and the current value of the current of this phase. After switching on the switching thyristors of this phase, signals are input to the trigger 18. The signal from element 12, 13 is removed and fed to elements 14:15 of the other channel, thereby preparing the required fill factor of the other phase. For half a period, the device is operated for the opposite phase.

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Claims (1)

DEVICE FOR CONTROL OF THYRISTOR-PULSE REGULATORS OF VEHICLE TRACTION ENGINES, comprising a control pulse generator of regulators and a mode operation generator made on a command device connected by an output to the control signal generator input of the reference pulse generator connected to the first input of the reference pulse generator connected to the current pulse generator input connected to the control inputs of controlled frequency generators connected by outputs to the inputs of the second and third pulse shapers s, the outputs of which are connected to one of the inputs of the corresponding triggers, the other inputs of which are connected to the output of the first pulse shaper, and the outputs are connected to the first inputs of the first, second, third and fourth elements, respectively, the second inputs of which are connected respectively to the output of the second and third pulse shapers, which means that, in order to increase reliability, it is equipped with an additional trigger and an OR element, the inputs of the first of which are connected respectively to the course of the second and third elements. And, and the inputs of the second - with the outputs of the first and fourth, while the first output of the additional trigger is connected to the third input of the first and second elements And, and the second with the third input of the third and fourth elements And, while the inputs of the additional trigger are connected to the outputs of the control pulse generator regulators, and the outputs of the elements OR - with its inputs. SU .1184709