SU1721589A1 - Electric apparatus testing rig - Google Patents

Abstract

The invention relates to automatic control devices and can be used for life tests of electromechanical assemblies. The purpose of the invention is to expand the functionality by fixing the number of actuations of the electrical unit during the life test with simultaneous fixation of failures in the mobile system of electrical units. It is achieved by introducing into the circuit two counters with corresponding control circuits. 2 Il.

Description

The invention relates to automation devices and is intended for testing electrical aggregates, in particular for conducting endurance tests of electrical aggregates, made on the basis of electromagnets.

A device is known that signals the position of the core of electromagnetic mechanisms, comprising a carrier frequency generator, a diode, a transformer, a trigger indicator, a comparator, a reference signal source, a gating driver, and an NAND circuit.

The known device has the disadvantage that when the core of the electromagnetic mechanism is jammed, it generates a signal that it operates, which reduces the reliability of the control of the operation of the core of the electromagnetic mechanism and does not allow fixing failures in the operation of its moving system when carrying out life tests of electrical units.

It is also known a device for testing electrical aggregates comprising a validity sensor, a first and second threshold elements, a trigger, terminals for connecting electrical aggregates, and a differentiating circuit.

The known device has the disadvantage that it does not fix every actuation of the mobile system of the electrical unit and, in the presence of mashing of the mobile system when conducting life tests, identifies this state as normal functioning of the electrical unit.

The closest to the present invention is a device for monitoring the operation of an electromagnet, comprising a power supply unit, an amplitude detector, a comparator, a first trigger, a current sensor, the first And element, the first key, the output of which is connected to the first input of the device for connection to the control object, the second input for connection to the output of the control object (L

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connected to the information input of the amplitude detector and through the current sensor to the common bus of the device, the direct output of the first trigger is connected to the first input of the first element I, the output of which is connected to the control input of the first key, as well as the second and third keys, first and second rectifiers drivers, first to fourth shapers of a single pulse, controlled pulse generator, amplifier, display element, second, third and fourth triggers, delay element, from the first. to the third BAN element, second And element, from first to rety element or switching element, pulse genera- tors actuation of the electromagnet, a memory element and a load element.

However, the known device does not provide for fixing the number of actuations of the electromagnet and does not fix failures in the mobile system when monitoring the operation of the electromagnet, which limits the functionality and does not allow it to be used when conducting resource tests of electrical units.

The aim of the invention is to expand the functionality of the known device by fixing the number of actuations of the electrical unit when conducting life tests while simultaneously fixing failures in the mobile system of electrical units.

The goal is achieved by the fact that a device containing a power source, the output of which through the switching element is connected to the information input of the first key, a differentiator, the input of which is connected to the first terminal of the winding of the electrical unit, the second output of which is connected to the inverting input of the limiting amplifier through a current sensor - with a zero potential bus and through an integrating RC circuit - with a non-inverting input of the amplifier-limiter, the output of which is connected via a rectifier to the zero input of the first trigger a, whose single input is connected to the output of the first OR element, the first input of which is connected to the installation bus of the initial state, the second trigger, three single pulse drivers, the second and third OR elements, two BAN elements, a controlled pulse generator, a delay element, the second and third keys, two counters are introduced, the fourth and fifth elements OR, the output of the first key is connected via the second key to the first terminal of the winding of the electric unit and to the inverse input of the first element BANE, output

The differentiator is connected to the counting input of the second trigger, the zero input of which is connected to the output of the first OR element. and the output through the third key is connected to the direct input of the first BANGE element, the output of which through the first driver of single pulses is connected to the counting input of the first counter and to the first input of the second element OR, the direct output of the first trigger is connected to the controlling input of the third key, inverse output - with the first input of the third element OR, and through the second generator of single pulses with the second input of the second element OR, with the zero input of the controlled pulse generator and with the counting input of the second counter, the output the second OR element is connected to the second input of the first OR element and through the delay element to the first input of the fourth OR element, the second input of which is connected to the output of the third single pulse generator, the input of which is connected to the information input of the first key, the output of the fourth OR element the input of the second element BANGE, the output of which is connected to the trigger input of the controlled pulse generator, the output of which is connected to the control input of the first key, the overflow outputs of the first and second counters are connected respectively to the first and second inputs of the fifth OR element, as well as the second and third inputs of the third OR element, the output of which is connected to the control input of the second key, the output of the fifth IL element AND to the inverse input of the second BAN element, inputs the reset of the counters are connected to the bus of the initial state.

FIG. 1 shows a functional diagram of the device: in FIG. 2 - diagrams on the operation of the device.

The device contains a power source 1, the output of which through the switching element 2 is connected to the information input of the first 3 key, differentiator 4, the input of which is connected to the first output of the winding 5 of the electrical unit, the second output of which is connected to the inverting input of the limiting amplifier 6, through the current sensor 7 - with a zero potential bus and through an integrating RC-circuit 8 - with a non-inverting input of the amplifier-limiter, the output of which is connected via rectifier 9 to the zero input of the first trigger 10, whose single input is connected with the output of the first element OR 11, the first input of which is connected to the bus 12 for setting the initial state, the second trigger 13, three

Former 14 -.16 single pulses, the second 17 and third 18 elements OR. two BANKS 19 and 20, a controlled pulse generator 21, a delay element 22, a second 23 and third 24 keys, two 25 and 26 counters, a fourth 27 and fifth 28 OR elements, and the output of the first 3 key is connected via a second key 23 with the first output of the winding 5 of the electrical unit and with the inverse input of the first element BAN

19, the output of the differentiator 4 is connected to the counting input of the second trigger 13, the zero input of which is connected to the output of the first element OR 11, and the output via the third key 24 is connected to the direct input of the first element BANGE 19, the output of which through the first driver 14 of single pulses is connected to the counting input of the first counter 25, and with the first input of the second element OR 17, the direct output of the first trigger 10 is connected to the control input of the third key 24, the inverse output with the first input of the third element OR 18 and through the second driver 15 one full-time pulses with the second input of the second element OR 17, with the zeroing input of the controlled oscillator 21 pulses and with the counting input of the second counter 26 pulses.

The output of the second element OR 17 is connected to the second input of the first element OR 11 and through the delay element 22 to the first input of the fourth element OR 27, the second input of which is connected to the output of the third 16 single pulse generator, the input of which is connected to the information input of the first 3 key, output the fourth element OR 27 is connected to. direct entry of the second element BAN

20, the output of which is connected to the trigger input of a controlled pulse generator 2.1, the output of which is connected to the control input of the first key 3. the overflow outputs of the first 25 and second 26 counters are connected respectively to the first and second inputs of the fifth element OR 28, as well as to the second and the third inputs of the third element OR 18, the output of which is connected to the control input of the second key 23, the output of the fifth element OR 28 is connected to the inverse input of the second element BANGE 20, the reset inputs of the counters are connected to the installation bus of the initial anyway

The mode of operation of the amplifier-limiter 6 is chosen so that when power is applied to the device circuit, a negative voltage is established at its output (Fig. 2L), under the action of which the rectifier 9 is locked, as a result of which the input to the installation

the zero state of trigger 10 enters the level of logical O.

Mode of operation of shapers 14-16

single pulses selected so that when

5 powering up the circuit on their device

outputs set to zero

voltage (Fig. 2i, m, b).

The controlled oscillator 21 is built on the principle of a timer and, if there is a trigger signal at the input, a pulse of a certain duration is formed at the output (Fig. 2c, the time point between points 29-30), and when the signal is received at the generator zero reset, the output voltage is cleared (Fig. 2c, time point - 32).

The device works as follows.

Before the beginning of the life test to

0, the winding 5 of the apparatus under test is connected to the first and second terminals of the device for connecting the electrical unit, and a short pulse (Fig. 2a) is supplied to the initial installation state bus 12, under the action of which, through the element 11, the trigger 10 is set to one state, as a result At its direct output a logical 1 is set (FIG. 2d), which is fed to the control input of the key.

0 24, as a result of which the key 24 is activated and remains in the closed state, and on the inverse output of the trigger 10 a logical O is set (FIG. 2e), which through the OR 18 element goes to the control

5, the input of the key 23 does not affect its operation, and which in the initial state is also closed, the trigger 13 is set to the zero state (Fig. 2h), and the counters 25 and 26 are also set to the zero state.

.0 pulses.

For conducting endurance tests, the switching element 2 is closed and the voltage from the output of the power supply source 1 is closed.

5 is fed to the input of a single pulse shaper 16, which is triggered and generates a pulse at the output (Fig. 26), which through the OR element 27 and the BANE element 20 is fed to the input of the controlled pulse

0 of the generator 21, at the output of which a pulse is formed (Fig. 2c), which is fed to the control input of the key 3, which leads to its closure. At the same time, the voltage from the output of power supply 1 through the switching element 2 and serially connected switches 3 and 23 for the duration of the pulse (Fig. 2c) goes to the winding of the electric unit 5 as a control voltage, and passes through the winding 7 current.

The current in the winding 5 of the electrical unit increases according to a certain law.

If the mobile system of the electrical unit does not work, then the current increase in the winding of the electrical unit occurs without a characteristic dip (time point between points 29-30, fig. 2d), due to the movement of the core of the mobile unit of the electrical unit. A voltage drop across the current sensor 7 (Fig. 2d), proportional to the current in the winding 5 of the electrical unit, is applied to both inputs of the amplifier-limiting impulse response of the mobile unit of the electrical unit. In this case, the voltage to the inverting input is supplied directly, thus, it corresponds in form to the actuation current of the electrical unit (time point between points 29-30, solid line, Fig. 2d), and the voltage to the non-inverting input is fed through the integrating HC- circuit 8, as a result of which the shape of the voltage at the non-inverting input is smoothed with respect to the shape of the operation current and the change of the signal at this input is delayed with respect to the change of the signal at the inverting input (the time point between points 29-30. Tierney lines, Fig. 2d).

The absence of a characteristic dip in the generator response current curve causes the voltage at the inputs of the amplifier limiter b to increase and the voltage at the non-inverting input does not reach the value of the voltage at the inverting input, resulting in a negative voltage at the output of the amplifier-limiter 6 (Fig. 2L), with which the rectifier 9 is locked, as a result of which its output maintains a logic level O, which is fed to the input of the installation in the zero state of the trigger 10 and does not change its state.

At the same time, the control voltage enters the inverting input of the BANCH element 19 and prohibits its operation for the duration of the control voltage, and on the leading edge of this voltage, the differentiator 4 generates a pulse (Fig. 2g), under the action of which the trigger 13 is set to one. No state (fig. 2h). The logical 1 signal from the output of the flip-flop 13 is supplied via the key 24 to the direct input of the BANCH element 19. At the end of the control voltage (time, point 30, Fig. 2c), the prohibition signal is removed from the inverting input of the BANCH 19 element, which leads to its triggering, since at its direct input there is a logical 1 from the output of flip-flop 13, which

through the element BANGE 19, enters the input of the former 14 of a single pulse, which is triggered and generates a pulse at the output (Fig. 2i), which is recorded in the counter 25, warning that the electrical unit has failed, and the OR 17, indicated the pulse through the element OR 11 sets the trigger 13 to the zero state (Fig. 2h, moment of time, point 30), and passed through the delay element 22, the time of which is selected from the condition of ensuring the restoration of the circuit for the subsequent actuation of the electrical unit, pulse (Fig. 2k ) cher The element OR 27 and the element BANGE 20 is fed to the input of the controlled generator 21, at the output of which another pulse is formed (Fig. 2c, the time between points 31-32), which is fed to the control input of key 3, and again the control voltage on the winding 5 of the electrical unit.

If the mobile system of the electrical unit works, then the current increase in the winding 5 of the electrical unit occurs with a characteristic failure (Fig. 2d, the time between points 31-32, solid line) due to the movement of the core of the mobile system of the electrical unit. The voltage from current sensor 7 is fed to the inputs of the amplifier-limiter b. At the same time, when the voltage on the non-inverting input (fig. 2d, time between points 31-32, dotted line) is reached, the voltage on the inverting input (fig. 2g, time between points 31-32, solid line) is limiting amplifier 6 jumps into the positive saturation region (Fig. 2L), thereby forming the leading edge of the trigger of the electrical unit at the output of the amplifier 6, and in accordance with the nature of the current change in the winding 5 of the electrical unit, when the voltage at the inverting input of the amplifier 6 reaches Cheney voltage at the noninverting input (FIG. 2d) amplifier 6 jumps to a negative saturation region thus formed trailing edge of the electric plant movable actuation system (Fig. 2n) at the output of amplifier B characterizing a movable actuation system of the electric plant.

A pulse (Fig. 2L) from the output of amplifier 6 through the rectifier 9 is fed to the setup input to the zero state of trigger 10 and on the falling front of this pulse the trigger 10 is set to the zero state, as a result of which the forward output of the trigger 10 is set to logical O ( Fig. 2D)

under the action of which the key 24 is opened, preventing the possibility of the formation of a failing pulse in the electric unit, and at the inverse output a logical 1 is installed (FIG. 2e), which through the OR 18 element enters the control input of the key 23, which opens and removes the control voltage from the winding 5 of the electrical unit.

Logical 1 from the inverted output of the trigger 10 also enters the input of the imaging unit 15, which is triggered and generates a pulse at the output (FIG. 2m), which is recorded in the counter 26, the generator unit triggers, and having entered the generator 21, the output impulse stops the formation of a pulse at the output of the generator 21 (Fig. 2c, point in time, point 32).

In addition, a pulse (Fig. 2m) passed through the element OR 17, trigger 10 is set to one state and trigger 13 is set to one state, as a result of which the circuit is prepared for the next triggering cycle of the electrical aggregate, and element 22 is passed delays, the specified pulse generates the next start pulse of the generator 21 (Fig. 2k, point in time, point 33).

Further, the processes are repeated as described. In this case, if there are failures in the operation of the mobile system of the electrical unit, the counter 25 is filled. And in the absence of failures, the counter 26 is filled. The results of the life tests are evaluated by the counters 25 and 26 pulses. In the case of recording into the counter 25 one impulse for a certain number of actuations of an electrical unit set by counter 26 and specified by technical conditions on electrical units that allow a single failure of the mobile unit of the electrical unit, the test results are considered positive. In the case of recording into the counter 25 of two or more pulses, the electrical unit is rejected.

In this case, in the case of full filling of the counter 25, a logical 1 signal is generated at its output, which through the OR element 18 is fed to the control input of the switch 23, which opens and removes the control voltage supply to the winding 5 of the electrical unit, and passes through the OR element 28, The logical 1 from the output of the counter 25 is fed to the inverting input of the BANCH element 20 and prohibits its triggering, thereby preventing further start of the generator 21 by the next pulse generated at the output of the delay element 22. Similarly

Thus, when the counter 26 is completely filled, the OR element 28 sends a logical 1 signal to the inverting input of the BANGE 20 element, the generator 21 stops, and the key 23 is opened through the OR 18 element and the life tests automatically stop.

When testing electrical units, which, according to the technical conditions, do not accidentally fail, when evaluating the results of life tests, not a single impulse should be recorded in counter 25, and counter 26 should be completely filled.

At the end of the test disconnect the switching element 2.

The technical effect of using the proposed device is expressed in expanding the functionality of the device. The proposed device, in comparison with the prototype, provides not only a periodic supply of a control signal to the winding of an electrical unit with an assessment of its usefulness, but also fixes the number of actuations of the mobile system of the electrical unit while simultaneously fixing each malfunction of the electrical unit, which allows it to be used to conduct life tests of electrical units .

In addition, the proposed device automatically supplies the control voltage to the winding of the test apparatus when the mobile system of the electrical unit fails to parry the accidental failure of the mobile system of the test electrical unit and, according to the results of life tests, evaluate the quality of the electrical unit for operation and, consequently, to increase the reliability of the operation of the automation device, where the tested electrical units are used.

Claims (1)

Invention Formula A device for testing electrical units containing a power source, the output of which is connected through the switching element to the information input of the first key, the differentiator whose input is connected to the first output of the electric unit's winding, the second output of which is connected to the inverting input of the limiting amplifier, and the current sensor to the zero bus potential and through the integrating RC circuit - with a non-inverting input of the amplifier-limiter, the output of which is connected via a rectifier to the zero input of the first trigger, are single whose input is connected to the output of the first OR gate, the first input of which is connected to the setpoint bus of the initial state, the second trigger, three single pulse drivers, the second and third OR elements, two BAN elements, the controlled pulse generator, the delay element, the second one. and the third keys, characterized in that, in order to expand the functionality by fixing the number of actuations of the electrical unit during the life tests while simultaneously fixing failures in the mobile system of electrical units, two counters, the fourth and fifth elements OR, are entered, and the output the first key is connected via the second key with the first output of the winding of the electric unit and with the inverse input of the first element BANGE, the output of the differentiator is connected to the counting input of the second trigger, zero input The first is connected to the output of the first OR element, and the output through the third key is connected to the direct input of the first BANGE element, the output of which is connected to the counting input of the first counter through the first single pulse generator and to the first input of the second element OR, the first output of the first trigger is connected with the control input of the third key, inverse output - with the first input of the third element OR and through the second generator of single pulses - with the second input of the second element OR, with the zero input of the controlled pulse generator and with the counting input of the second counter, the output of the second element OR is connected to the second input of the first element OR and through the element delays - with the first input of the fourth element OR, the second input of which is connected to the output of the third generator of single pulses, the input of which is connected to the information input of the first key, the output of the fourth element OR is connected to the direct input of the second BANCH element, the output of which is connected to the triggering input of the controlled pulse generator, the output of which is connected to the control input of the first key, the overflow outputs of the first and second counters are connected respectively to the first and second inputs of the fifth element OR , as well as with the second and third inputs of the third element OR. the output of which is connected to the control input of the second key, the output of the fifth element OR — with the inverse input of the second element BANGE, the reset inputs of the counters are connected to the installation bus of the initial state. FIG. T