SU1522349A1 - Device for measuring synchronizer turn-on angle - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to devices for testing and adjusting auto-synchronizers. The purpose of the invention is to improve the accuracy of measurements in non-stationary modes, simplifying and expanding the functionality. The device contains a digital phase angle converter 1 of synchronized voltages, a memory register 2, a one-shot 3, a 4 mode switch and an RS flip-flop 5. A single-vibration 3, a switch 4 and a trigger 5 control the operation of the memory 2, into which the current value is entered phase shift angle twice during the input voltage period during operation of the one-shot 3. Starting the one-shot 3 is performed by the output contacts of the synchronizer 6. The control circuit of the converter 1 for the phase-shift and register 2 enables automatically house triggering synchronizer to fix the value of the angle of inclusion / error /, measured in the previous cycle. 1 hp f-ly, 2 ill.

Description

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The invention relates to electrical engineering, namely, devices for adjusting and testing automatic synchronizers.

The purpose of the invention is to improve the accuracy of measurements in non-stationary modes, simplifying and expanding the functionality of

Figure 1 shows the structural diagram of the proposed device; Fig. 2 shows a possible embodiment of a digital phase angle converter "

The device contains a digital converter 1 of phase angle of synchronized voltages, memory register 2, one-shot 3, switch 4 modes and. RS flip-flop 5 A digital phase angle transducer 1 is connected to the information inputs of memory register 2 via phase outlets. The output of the one-shot 3 is connected to the first switched circuit of the switch 4, the second of which is connected to the stator current sensor terminal. The switch output is connected to the S-input of the trigger 5, the R-input of the trigger 5 is connected to the code of the auto-synchronizer 6, and the output of the trigger 5 is connected to the control input of the memory register 2 Digital converter I of the phase shift angle contains a function converter 7 of the difference |) a in the time interval, one-shot 8j RS-flip-flop 9, key 10, binary-ten counter 11, delay element 12 and generator 13 of counting pulses. The inputs of the functional pre, ebrazvatel 7 phase difference in time; the interval is connected to the input synchronized circuits, and its output is connected to the input of a single-vibrator 8, the R-input of the trigger 9 and the delay Element 12. The output of the one-shot 8 is connected to the reset inputs of the binary-decimal counter 11 and (by the trigger 9, the output of which is connected to the control input of the to key. The second input of the key 10 is connected to: the output of the generator 13 counting pulses b, the output of the delay element 12 is co-, |; inen with input Write register 2. im tee.

The device works as follows: | zazom

In the functional converter, the phase difference in the time interval is 232349,

the shaft twice during the input period, the stresses are transformed: - :: - the phase angle in time.

with an interval proportional to this shift. The front edge of the formed time interval starts the one-shot 8, generating a pulse of a certain (0.2 ms) duration. The leading edge of this pulse is reset to zero by the readings of the counter P, and the falling edge through trigger 9 opens the key 10, passes to the counting input

15 counter 11 pulses from generator 3 "The back edge of the output voltage of the functional converter 7 counter 11 stops and a delay through element 12 arrives

The 20 signal records the contents of counter 11 into the register 2 of the device memory. At the same time, if there is a recording resolution from trigger 5, the number from the output of counter 11 is recorded. Recording is released at the moment of triggering the output relay of the synchronizer 6 o. This starts the single-vibrator 3, which has a delay time equal to -

30 nizator, and trigger 5 is transferred to the measurement preparation mode when a signal is present at its output Recording enablement (and blanking of indicators in the digital reading device). Thus, during operation of the one-shot 3, the old is erased and the new memory is written to the register 2 numbers (code) each measurement cycle, Toe twice in the period

40 input voltages o Depending on the position of the switch 4, the recording resolution is removed (the flip-flop 5 is transferred to the Measurement mode, and the register 2 - to the information storage mode 45) or after the one-time 3 delay time (its falling edge) 5 or from the stator current sensor acting on the R-input of the trigger, 5, in the first case

50 ki each time the synchronizer is triggered, the switching angle (errors) of the synchronizer is measured. In the second case, the angle is measured (recorded) —the angle of the wave at synchronization of the synchronous oscillator. The measurement result from the register can be transmitted to a digital readout device. and on that bls), the switching angle is displayed in electrical degrees.

Thus, in comparison with the known, the proposed device measures the switching angle (errors) of the synchronizer in automatic mode with greater accuracy (especially at small slides), is simpler and, moreover, measures (fixes) the switching angle at generator synchronization. show that the accuracy of the measurement of the firing angle at small slides. (less than O, Hz) increases by two to three times and is 0.1-0.2 elo (in the range of angles 0-100 °),

Claims (1)

1. A device for measuring the switching angle of the synchronizer, a phase-locked converter of the phase shift of synchronized voltages, a memory node whose input is connected to the output of the phase angle converter, and a control timer whose start input is connected to the terminal for connecting the synchronizer, and the output connected to the control input /// amvpshp - 223496 a minimizing node, characterized in that, in order to measure measurement accuracy in non-stationary with the modes and simplification, the control timer is implemented as a single-shot and RS-flip-flop, the R-input of which is connected to the output of the single-shot, with a terminal for connecting CH iXpOHH W ate, and the trigger output is connected to the control input of the storage node, which is used as a memory register, and the phase angle transducer is made with a digital output 2 o Device according to Po1, characterized in that, in order to expand the functionality, a new timer is inserted into the control timer the switch, the R-input of the trigger is connected to the output of the one-shot through the switch, and the device is equipped with an additional terminal for connecting the dininee to the stator current sensor of the synchronized generator connected to another switched circuit of the switch „ eleven nod .J and Zoggis 8fi &