SU1332040A1 - Shaper of command signal for process system of power supply unit - Google Patents

Abstract

The invention relates to the field of energy, in particular, to the processing of setting signals for the formation of commands, which include the executive automation systems of the power unit, as well as systems for its protection against abnormal modes. The aim of the invention is to increase the reliability of the driver, the expansion of the range of controlled frequencies, as well as the expansion of the field of application and increase in power supply efficiency. The command signal shaper for technological systems of the power unit contains a pulse sensor 2 of rotation of the shaft 1 of the power unit connected to the counting input of a counter of 3 pulses connected by codes to the corresponding inputs of the decoder 4 that controls the operation of the command unit through key element 11. I (L

Description

steps to the second input of the key element of the output from the controlled timer 6, in which the signals of the sample time intervals received through the conjunctor to the reset input of the counter of 3 pulses are sampled. The operation of timer 6 is blocked by a signal coming through the first multiple-input disjunctor from the key output.

one

The invention relates to power engineering, in particular, to the processing of the reference signals for the formation of commands, which include the executive automation systems of the power unit, as well as systems for its protection against abnormal modes.

The aim of the invention is to increase the reliability of its operation and to expand the range of monitored frequencies of rotation of the shaft of the power unit.

The drawing shows the proposed device.

The former includes a power unit shaft 1, a shaft rotation pulse sensor 2, a pulse counter 3, a decoder 4, a conjunctor 5, a controlled timer 6, a frequency divider 7, a reference frequency generator 8, a conjunctor 9, an inverter 10, a key element 11 consisting of conjunct - ra 12 and inverter 13, command block, made of polarized relay 14, shunt, diode 15, LED 16, separation diode 17, resistor 18, normally open contact group 19 of polarized relay, command contact group 20 of polarized relay , reset button 21, pl govhodovye disjunctors 22 and 23,

The device works as follows.

In the initial state, the contacts of the command relay 14 of the polarized type are in accordance with the image in the drawing, and the counter of 3 pulses and the divider 7 of the frequency are zero, the decoder 4 is connected to the corresponding 2040

element 11, the operation of the pulse counters is blocked by a signal coming through the second multi-input disjunctor 22 e output of the decoder 4 to the control input of the counter 3 pulses and to the second input of the conjuncture 5. The number of inputs to the analog-input disjunctor 23 is determined by the number of output commands. 1 hp f-ly, 1 ill.

3 pulse counter pins for diffraction of the setup code. During acceleration, the unit increases in proportion to the speed of its rotation. The frequency generated by the sensor 2 rotates. not a shaft of impulse signals that are found in it until during the measuring cycle,

determined by the frequency of the signals of the controlled timer, taken from the output of the frequency divider 7, the result of the summation of these pulses will correspond to the setting Sign-.

5 rotational speed, which is expressed by the arrival at the inputs of the decoder 4 from the outputs of the counter 3 pulses of signals with a logic level of 1. This results in the output of this decoder of a signal arriving at the C input of the counter 3 pulses through the first input of disjunctor 22 and one of the inputs of conjuncture 5. As a result, both the summation process of the signal pulses and the process of zeroing the counter of 3 pulses are stopped, because the 1st signal that occurs at the output of the frequency divider

0 does not go to the reset input of this counter. The output signal of the decoder 4 is fed through the inverter 13 to one of the inputs of the conjunctor 12, which maintains a logic level at its output until another signal from the output of the frequency divider 7 receives a signal with a logic level 1, which indicates good health the control of the e.Q of my timer 6. Thereafter, at the output of conjunctor 12,

five

signal with a logical level of O,

which through the disjunctor 23 enters the input of the conjunctor 9, which blocks the operation of the controlled timer 6 by the chain. As a result, the logic level 1 at the forward output of the frequency divider 7 will be maintained until the polarized relay 14 connected to the output of the key element 11 is triggered, which is the command unit. When the relay 14 trips, its contact group 19 closes, which connects an LED 16 to the zero bus via an extinguishing resistor 18, which signals the generation of a command signal and the blocking input of the decoder 4. Contact group 20 changes its position, including the executive elements of the system of automatic automation of the unit.

Thus, the proposed device maintains its operation practically at any possible frequency of rotation of the unit, since the setting signal at the output of the decoder 4 is retained due to blocking the counter of 3 pulses until the command to turn on is generated and timer 6, which leads to the counter overflow of 3 pulses at any frequency of rotation of the unit, does not lead to a false generation of a command signal; Since in this case, the output of the frequency divider 7 will not produce a signal with a logic level of 1, transferring the key element 11 to the active state, in connection with which current will not flow into the relay 14 and a false command signal will not be generated. In the initial state, the setting channel consisting of the decoder 4, the key element 11 and the relay 14 is established by supplying a current to the winding winding of this relay, for example, when the button 21 is pressed, since the relay has a trigger characteristic, the cokpa setting signal - natsa and with interruptions in nutrition.

In the developed schemes, it is envisaged that the output of the controllable timer can be controlled to any indicator device, for example, to a mash, a one-shot with an indicator element at the output. Multi-input disjunctors 22 and 23 serve for d

32040.

Key to the scheme of other installation channels.

The signals from the output of the divider 7 frequency are removed from the straight arm, however, to improve timing and load characteristics, the inverse output of the divider 7 is also used, which is connected via inverter 10.

Thus, the proposed device provides increased reliability and extends the range of monitored frequencies, which is especially important for the power generator.

comrade operating autonomously

and in systems.

Claims (2)

1. Command signal feed for process units of a power unit, comprising a pulse rotary sensor coupled to a shaft a power unit controlled by a command unit, a decoder and a pulse counter, the counting input of which is connected to a pulse rotary sensor, and the outputs to information inputs of the decoder, characterized in that, in order to increase the reliability and expand the range of monitored frequencies, a key element, a conjunctor | and a controlled timer, the output of which is connected to the first input of the conjunctor and to the first input of the key element, the output of the deshfrator is connected. to the control input of the pulse counter, the second input of the conjunctor and the second input of the key element, the output of the key element is connected to the control input 41 of the command block and to the control input of the controlled timer, and the output of the conjunctor is connected to the reset input of the pulse counter. 2. A feedformer according to claim 1, characterized in that, With the aim of expanding the field of application and power efficiency, two multi-input disjunctors are introduced into it, the number of inputs of which is determined by the number of output commands, and the command unit is equipped with an additional output the output of the key element is connected to the corresponding input of the first disjunctor, the output of which is connected to the control The control input of the timer, the leading input of the pulse counter, the output of the decoder is connected to the second input of the conjunctor, and the output input of the second disjunct current of the command unit is connected to the controller, the output of which is connected to the control input decoder.