SU1531036A1 - Device for checking phasing of ac electric machines - Google Patents

Abstract

This invention relates to instrumentation technology. The purpose of the invention is to expand the scope and increase the reliability of tests by unambiguously controlling the correctness of phasing and breaking windings of AC electric machines connected both in star and triangle schemes, achieved by introducing a constant 2 and alternating current 3, buttons "Start" 4, "Stop" 5, "Star" 6, "Triangle" 7, making the measuring unit in the form of blocks 8 prodvodnki and 71 phasing. When you press the "Start" button 4, the dialing unit 8 is started and the windings connected to terminals 1 ₁ -1 ₆ are monitored for proper connection and for an open circuit. In the event that the windings from the output 14 of the block 8 for continuity are good, a signal is output to the phasing unit 71. By pressing one of the buttons 6 or 7, the controlled windings are connected in a "star" or "triangle" scheme and the winding phasing is monitored. The main indicator 119 indicates the correct phasing of the windings, and the additional indicator 126 indicates their serviceability and correct connection to the terminals 1 ₁ -1 ₆ . 7 ill., 2 tab.

Description

one

(21) it3265 & 8/2 t-21

(22) 11/12/87

() 12.23.85. Vul. N

(71) Magnitogorsk State Institute for Designing Metallurgical Plants

(72) M.A. Geller, V.N. Kozyr and I.A. Tarnavsky

(53) 621.3Г / .031 (088.6)

(56) USSR author's certificate

tf 620917, cl. G 01 R 31/06, 1977.

(W) DEVICE FOR THE CONTROL OF FASIROV-K1; ELECTRIC VARIABLE MACHINES

TEC

(57) The invention relates to instrumentation technology. The purpose of the invention is to expand the scope and increase the reliability of the tests by unambiguously controlling the correctness of the phasing and breaking of the windings of AC electrical machines, connected as

SP

with

00 O5

star

the same as in the triangle scheme, is achieved by introducing constant 2 and alternating 3 current sources into the device, Start 4, Stop 5, Star 6, Triangle 7 buttons, making the measuring unit in the form of sounding blocks 8 and phasing 71. The start-up starts the dialing unit 8 and the windings connected to the terminals are monitored for proper connection and for an open circuit. AT

The invention relates to instrumentation engineering and can be used to control the correct switching of windings during testing of electrical machines.

The purpose of the invention is to expand the scope and increase the reliability of the tests by checking the correctness of the phasing and breaking of the windings of AC electric machines connected both in a star and a triangle.

FIG. 1 shows functional

scheme of the device for controlling the phasing of electric machines of alternating current; in fig. 2 is a functional diagram of the dial tone; FIG. 3 is a functional diagram of the phasing block; FIG. - functional diagram of the main indicator in figure 5 functional diagram of the additional indicator; figure 6 is a timing diagram of the signals of the software-switching device of the continuity block; 7 is a timing diagram of the signals of a software switching device of the phasing unit.

Table 1 shows the states of the display elements of the main indicator.

Table 2 shows the states of the display elements of the additional indicator.

The device contains terminals for connecting the windings of a controlled electric machine 1, a source of 2 direct current, a source of 3 alternating current, buttons Start 4, Stop 5, Star 6, Triangle 7, a block 8 of pro-calls consisting of a software switching device 9, And 10-25, elements OR 26-3, triggers, elements

If the windings from the output 1 of the pro-call block 8 are operable, a signal is output to the phasing unit 71. By pressing one of the buttons 6 or 7, the controlled windings are connected according to the star or delta scheme and the winding phasing is performed. The main indicator 119 indicates the correct phasing of the windings, and the additional indicator 126 indicates their serviceability and correctness of connection to the terminals 1 i, - 1. 7 il. , 2 tab.

five

0

five

0

0

five

0

five

These are 50 potential isolators, output amplifiers 51-60 and short-circuits 61-70, switched output amplifiers 51-60, phasing unit 71, consisting of a program-switching device 72, elements of potential isolation, triggers 76 -83, elements HE 8A and 85, elements AND 86-93, elements OR, switch 100, voltage relay 101 with closing contact 102, output amplifiers 103-107 and closing contacts 108-118, switched output amplifiers 103-107, the main indicator 119, consisting of display elements 120-125, and the additional indicator 12 Consisting of display elements 127-139.

The continuity block 8 and the phasing block 71 form a measuring unit. The inputs of the main indicator 119 are connected to the first outputs of the measuring unit, the second outputs of which are connected to the inputs of the additional indicator 1 2fe. The terminals 1, - 1 j, for connecting the windings of the monitored electrical machine are connected to the inputs of the measuring unit, the first inputs of the continuity block 8 and the phasing 71 are connected respectively to each other and to the inputs of the measuring unit. The source 2 of direct current is connected to the second inputs of the side calls dial 8 and phasing 71, the third inputs of which are connected to the Stop button 5. The Start button is connected to the fourth input of the block 8 dials. The AC source 3 is connected to the fourth inputs of the phasing unit 71, the fifth and sixth inputs of which are connected to the Star 6 and Triangle 7 buttons, respectively, and the seventh input

one

connected to the first input of the dialing unit 8, the second outputs of which and the first outputs of the phasing unit 71 are connected respectively to the first and second outputs of the measuring unit

The device works as follows.

For a properly assembled monitored electrical machine 1, the start of the windings must be connected respectively to terminals 1, 1 and 1, and the ends respectively to terminals 1, b and It.

In this case, when the Start button C is pressed, the program-switching device 9 of the continuity block 8 starts and pulses are generated at its outputs in accordance with FIG. 6, the first pulse arrives at the corresponding input of the AND 10 element, at the input of the output amplifier 60 and through the OR element 33 - to the input of the output amplifier 58. This closes the contacts B1 and 63 and the voltage from the DC source 2 is supplied to the terminals 1 and 1 of the controlled electric machine 1, If one of the windings of the controlled electric machine is connected to the terminals 1) and C 1, a single signal appears at the output of the potential isolation element 50, which arrives at the corresponding input of the element 10. At the output of the element 10, a single signal also appears that arrives at the corresponding input of the trigger 35. The trigger 35 switches and a single signal appears at its output.

The second pulse generated by the software-switching device 9 is fed to the corresponding input of the element 11 and through the elements OR ES and 32 to the inputs of the output amplifiers 53 and 57. This closes the contacts b and b7 and the voltage from the DC source 2 is supplied to the terminals Ij and 1 of the monitored electrical machine 1. If one of the windings of the monitored electrical machine 1 is connected to the terminals Ij and 1, a single signal appears at the output of the potential isolation element 50 and is fed to the corresponding input of the And 11 element. When this element to the outlet and also J11 is a single signal which is supplied to the corresponding input trigger Zb. Trigger 36

1P36 perekpk mets, and its ryh (.1dg nntm-l kts single signal.

The third impulse is formed (5P (Tnn1,1y, software-switchable device (r 9, goes to co) (5 twe; tstvuyu1 1 POWER of the element I 12, to the input of the output amplifier 59 and through the element OR 7.8 to the input of the output amplifier 53- At by this

10 contacts 68 and 70 are closed and the voltage from the supply source 2 of the current is supplied to terminals 1 and to the monitored electric machine 1. If one) i is connected to the terminals 1 i and 1 on the windings of the electric machine 1 being monitored A single signal appears at the output, which is fed to the corresponding input of the terminal 12. At the same time, a single signal appears at the output of the element I 12, which is fed to the corresponding input of the flip-flop 37. The flip-flop 37 switches and its output single unit Ignal

From the outputs of the flip-flops 35-37, single signals arrive at the inputs of the element I 25, at the output of which also appears with a single signal, which means that the windings of the controlled electric machine 1 are connected correctly, i.e. respectively to terminals 1 and 1, 1, Is This signal goes through the element

C OR 3 to the corresponding input of the program-switching device 9 and prohibits the formation of subsequent pulses at its output, and also enters the corresponding input of the additional indicator 126. At the same time, the display element 127 signals that the windings of the monitored electric machine 1 are connected to the corresponding terminals 1, 5 1 /, i.e. You can start checking phasing.

In addition, from the output of the element And 25 a single signal is fed to the corresponding inputs of the software-trans-.

0 of the switching device 72 of the phasing block 71 and the switch 100. Before starting the checking of the phasing, one of the buttons Star 6 or Triangle 7 is pressed, which corresponds to the required type of winding connections of the controlled electric millimeter; 1. So, when you press the button, Sne. Tut 6 at the exit of the element 73 of the instantaneous release, a n-1 ii appears.

the signal that arrives at the corresponding trigger input 7b. At the output of the trigger 76, a single signal appears, which arrives at the corresponding input of the AND 86 element and through the NOT 8 element a zero signal arrives at the corresponding input of the And 87 element. At the outputs of the potential isolation element and the trigger 77 there is a zero signal, which to the corresponding input element And 87 and through the element NOT 85 a single signal is fed to the corresponding input element And 86.

Thus, at the inputs of the element And 86 there are single signals, and at the inputs of the element And 87 - zero signals. As a result, a single signal arrives at the input of the output amplifier 10}. At the same time, contacts 108 and 109 are closed and the windings of the controlled electric machine 1 are connected into a star. Accordingly, when the Triangle 7 button is pressed, the contacts 110-P2 are closed and the windings of the controlled electric machine 1 are connected in a triangle. At the outputs of the software switching device 72, pulses begin to form in accordance with FIG. 7.

The first pulse arrives at the corresponding input of the element AND 93 and through the elements OR and 97 to the corresponding inputs of the output amplifier 105 and switch 100. At the same time, contacts 1Y and 118 are closed, the voltage from the AC source 3 is supplied to terminals 1 and 1 of the monitored electric machine. 1, and the switch 100 connects the voltage relay 101 to the terminals 1 and 1 of the monitored electrical machine 1.

The second pulse goes to the corresponding input of the element AND 91 and through the elements OR 9 and 98 ria the corresponding inputs of the output amplifier 105 and the switch 100. At the same time, contacts 114 and 118 are closed, the voltage from the AC source 3 is supplied to terminals 1 and 1. electrical machine 1, and switch 100 connects voltage relay 101 to terminals 1f and 1 {of controlled electrical machine 1.

The third pulse arrives at the corresponding input of the element AND 89 and through the elements OR 95 and 99 to the corresponding

15310368

current inputs of the output amplifier 106 and switch 100. This closes the contacts 115 and 11b, the voltage from the AC source 3

leads to terminals 14 and 1 of the monitored electric machine 1, and switch 100 connects the voltage relay 101 to terminals 1 and 1 of the monitored electric machine 1.

The fourth pulse goes to the corresponding input of the element AND 92 and through the elements OR 95 and 97 to the corresponding inputs of the output amplification 5 106 and switch 100. This also closes the contacts 115 and 116, the voltage from the AC source 3 is supplied to terminals 1 and 1 of the monitored electric car 1, and the switch 100 connects the voltage relay 101 to the terminals 1 and 1 (controlled by the electric machine 1.

A fifth pulse arrives at the corresponding input element of the AND 88 element and through the OR 9b and 99 elements to the corresponding inputs of the output amplifier 107 and switch 100. At the same time, contacts IZ and 117 are closed, and the output from AC source 3 is supplied to terminals li and 1 controlled electrical machine 1, and switch 100 connects relay 101 to terminals 1 and 1 of controlled

5 electric cars 1.

The sixth pulse goes to the corresponding input of the element AND 90 and through the elements OR 9b and 98 to the corresponding inputs of the output amplifier 107 and switch 100. At the same time, contacts 113 and 117 are closed, the voltage from the AC source 3 is supplied to terminals 1 and c (monitored electrical machine 1, and switch 100 connects voltage relay 101 to terminals 1 and 1 of monitored electrical machine 1.

If the windings of the controlled electric machine 1 are phased correctly, the ratio

0

0

55

and

Ui

counter

where is the voltage on the controlled winding of the electric machine 1;

AC source voltage 3

alternating current. The correctness of the phasing is controlled by the voltage relay 101 connected to the corresponding terminals 1, l5 of the controlled electric machine 1 by means of the switch 100. The voltage relay 101 is adjusted so that its contact 102 closes when the voltage is consequently the machine 1, the contact 102 closes with each pulse generated by the software-switching device 72. On each short circuit, at the output of the potential disconnect element 75, one ary signal which through AND gates 88-93 is supplied to respective inputs of flip-flops 78-83 and further to the corresponding inputs 119. The primary indicator of luminescence elements 120-12 indication signals the proper phasing of the controlled electrical machine 1.

If the windings of the monitored electric machine 1 are phased incorrectly, the switching errors are determined depending on the state of the display elements 120-125 in accordance with Table 1.

In case the windings of the controlled electric machine 1 are connected incorrectly, after the passage of the third pulse from the program-switching device at the output of the AND 25 element, there is no single signal, therefore, at the outputs of the program-switching device. 9, pulses continue to form in accordance with FIG. 6, it is necessary to clarify on which clamps the windings are connected.

The fourth pulse arrives at the corresponding input of the element AND 13 and through the elements OR 31 and 33 to the inputs of the output amplifiers Zb and 58. This closes the contacts B1 and 65 and the voltage from the DC source 2 is supplied to the terminals 1 and 1j of the controlled electric cars 1.

A fifth pulse arrives at the corresponding input of the element AND AND and through the elements OR 30 and 33 to the inputs of the output amplifiers 55 and 58. At the same time, contacts b1 and b7 are closed and the voltage from the DC source 2 is supplied to terminals 1 and 1 controlled by the electrical cars 1.

The sixth pulse arrives at the corresponding input element And 15 and through the elements OR 29 and 33 to the inputs of the output amplifiers 5 and 58. At the same time

Q contacts B1 and B9 are closed and the voltage from DC source 2 is supplied to terminals 1 and 1 of the controlled electric machine 1. The seventh pulse arrives at the co5 corresponding input element AND 16 and through the elements OR 28 and 33 to the inputs of output amplifiers 53 and 58. This closes the contacts b1 and 70 and the voltage from source 2 of constant

0 current is applied to terminals 1, and 1 to the controlled electric key 1.

The eighth pulse arrives at the corresponding element 5 input And 17 and through the elements OR 27 and 31 to the inputs of the output amplifiers 52 and 56. At the same time, contacts 62 and 65 are closed and the voltage from source 2 of direct current is applied to terminals 1 j and 1 3 electric car 1.

The ninth pulse goes to the corresponding input element AND 18 and through the elements OR 27 and 30 to the inputs of the output amplifiers 52 and 55. At the same time, contacts 62 and b7 are closed and the voltage from the DC source 2 is supplied to terminals Ij and 1 |

d controlled electric machine 1.

The tenth pulse arrives at the corresponding input of the element AND 19 and through the elements OR 27 and 29 to the inputs

5 output amplifiers 52 and 5. At the same time, contacts b2 and b9 are closed and the voltage from a DC source 2 is supplied to terminals 1 and U of the controlled electric

0 cars 1.

The eleventh pulse arrives at the corresponding input element AND 20 and through the elements OR 27 and 28 to the inputs of the output amplifiers 52 and 53.

5 This closes the contacts 62 and 70 and the voltage from the source 2 of the direct current is supplied to the terminals 1g and Ij of the controlled electric machine 1.

The twelfth pulse arrives at the corresponding input of the AND 21 element and through the OR elements 29 and 32 n the inputs of the output amplifiers SA and 57. At the same time, contacts b and b9 and the voltage from source 2 are closed; This current is supplied to the terminals / vij and Is of the controlled elec- tries / Aiashina 1.

  The thirteenth impulse arrives at:., - / The input of the element AND 22 - H through the elements OR 28 and Z2 at the inputs of the output amplifiers 53 and 57. At the same time, contacts b and 70 are closed and the voltage from the DC source 2 is supplied to terminals 1j and 1 of the monitored electrical machine 1.

The fourteenth pulse arrives at the corresponding input element AND 23 and through the elements OR 26 and 29 to the inputs of the output amplifiers 51 and. In this case, contacts 66 and B9 are closed and the voltage from the DC source 2 is supplied to terminals 1 and 1 of the monitored electrical machine 1.

The fifteenth pulse arrives at the corresponding input of the element AND 24 and through the elements OR 26 and 28 to the inputs of the output amplifiers 51 and 53. At the same time, contacts 66 and 70 are closed and the voltage from the direct current source 2 is supplied to terminals 14 and 1 of the controlled electric machine one.

If during the passage of pulses from the fourth to the fifteenth, formed by the software switching device 9, a pair of terminals 1 is connected to a pair of terminals 1, then the winding of the monitored electric machine 1 is connected, a single signal appears at the output of the potential isolator 50 to the corresponding inputs of the elements And 13-2. In this case, the outputs of the elements 13-24 also appear single signals, which are fed to the corresponding inputs of the flip-flops 38-49 and further to the corresponding inputs of the additional indicator 126, by the glow of the display elements 127-139 of which the combinations of the windings of the monitored machine 1 are detected to the terminals - in accordance with Table 2, and the luminescence of any three display elements indicates that the windings are controlled by an electrical 15310Sb

Tricking machine 1 is connected incorrectly, and the luminescence of any two or one display element indicates that one or two windings are broken.

After the end of phasing control, the device returns to its original state using the Stop button 5.

invention formula

Phasing control device

AC electrical machines containing terminals for connecting the windings of the monitored electrical machine, measuring unit, main and auxiliary indicators, inputs

The main indicator is connected to the first outputs of the measuring unit, the second outputs of which are connected to the inputs of the additional indicator, the terminals for connecting the windings of the monitored electric machine are connected to the inputs of the measuring unit, characterized in that, in order to expand the field of application and increase the reliability of the tests by unambiguously checking the correctness phasing and breaks of windings of electric machines of alternating current connected both to the star and to the triangle are entered into it

sources of constant and variable

current, buttons Start, Stop, Star, Triangle, the measuring unit is made in the form of sound and phasing blocks, with the first inputs

Pro-calls and phasing units are respectively connected with each other and with the inputs of the measuring unit, the DC source is connected with the second inputs of the pro-calls unit and

phasing, the third inputs of which are connected to the Stop button, the Start button is connected to the fourth input of the continuity block, the AC source is connected to the fourth inputs

phasing unit, the fifth and sixth inputs of which are connected respectively with the Star and Triangle buttons, and the seventh input is connected to the first output of the continuity block, the second

the outputs of which and the first outputs of the phasing unit are connected respectively with the first and second outputs of the measuring unit.

L1

-

13

 and

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ur

ftf

Compiled by S. Radzevich Editor N. Tupitsa Tehred M. Khodanych Proofreader M. Maksimishinets

Order 7950/7

Circulation

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

f.

D

fie.7

Subscription

Claims (1)

The claims for phasing control The device of AC electric machines containing terminals for connecting the windings of a controlled electric machine, a measuring unit, primary and secondary indicators, the inputs of the main indicator are connected to the first outputs of the measuring unit, the second outputs of which are connected to the inputs of an additional indicator, terminals for connecting the windings of the controlled electric machine are connected with the inputs of the measuring unit, characterized in that, in order to expand the region at the Fifteenth pulse arrives at the corresponding input of the element And 24 and through the elements OR 26 and 28 to the inputs of the output amplifiers 51 and 53. In this case, contacts 66 and 70 are closed and the voltage from the DC source 2 is supplied to the terminals 1 ₄ and 1 of the controlled electric machine 1. If during the passage of pulses from the fourth to the fifteenth generated by the software-switching device 9, a winding of the controlled electrical machine 1 is connected to a pair of terminals 1, -1 _t , a single signal is generated at the output of the potential isolation element 5θ, which is fed to the corresponding inputs of the elements And 13 ~ 24. At the same time, at the outputs of the elements And 13 ~ 24, single signals also appear, which are fed to the corresponding inputs of the triggers 38-49 and then to the corresponding inputs of the additional indicator 126, by the illumination of the elements 127-139 of the indication of which combinations of connecting the windings of the controlled machine 1 to terminals 1 are determined , -1 ^ in accordance with Table 2, and the luminescence of any three display elements indicates that the windings of controlled electrification and increase the reliability of tests.30 tests due to the unambiguous control of the correct phasing and jerks of windings of electric AC machines connected to both a star and a triangle, DC and AC sources, Start, Stop, Star, Triangle buttons are introduced into it, the measuring unit is made in the form of continuity and phasing blocks, with the first inputs of 4θ blocks the bells and phasing are connected respectively to each other and to the inputs of the measuring unit, the DC source is connected to the second inputs of the bells and 45 phasing, the third inputs of which are connected to the Stop button, the Start button ^{1 is} connected to the fourth input of the continuity block, the AC source is connected to the fourth inputs 50 phasing unit, the fifth and sixth inputs of which are connected respectively to the Star and Triangle buttons, and the seventh input is connected to the first output of the continuity unit, the second $ 5 outputs of which and the first outputs of the phasing unit are connected respectively to the first and second outputs of the measuring unit.