SU1251232A1 - Synchronous salient-pole generator with device for monitoring change of value of air gap - Google Patents

Abstract

The invention relates to electrical engineering, in particular to the manufacture and testing of electric machines, and can be used to control the deviation of the air gap size of a video-pole synchronous generator. The purpose of the invention is to improve the accuracy of control. The output ends of the tested generator I are connected to a switch 2 of the mains voltage and, actively-inductively loaded 3, amplitude .selection 4 of maximum voltage and amplitude selector 5 of minimum voltage, connected to analog measuring element 6. Secondary windings of separation transformers 7, 8 are connected between each other in series and their free ends one through a resistor 9, and the others through a diode 10 connected to the base of the transistor I 1, the emitter of which is grounded. o (l

Description

and the first input of the 11PI-NE element is connected to the collector, the second input of which is connected to the output of the control element 14 and to one of the R-S inputs of the trigger 13, to the input of which the output of the logical element OR-NOT is connected

The invention relates to electrical engineering, and more specifically to the manufacture and testing of electric machines, and can be used to control the deviation of the air gap size of a pole-pole synchronous generator from the nominal one.

The purpose of the invention is to increase the accuracy of the control.

The drawing shows a generator circuit with a device for control.

At the end ends of the test generator 1 are connected a switch 2 of the mains voltage and an active-inductive load 3, as well as an amplitude selector 4 of the maximum voltage and an amplitude selector 5 of the minimum voltage, connected to the analog measuring element 6. On the linear voltages of the generator Neutral 1 is connected to two separation transformers 7 and 8, the secondary windings of which are interconnected counter-serially and connected through a resistor 9 and a diode 10 in the forward direction, connected to the base of transistor 11, emitte which is grounded, and the collector is connected to an OR-NOT 12 logic element, the output of which is connected to RS trigger 13, to which control element 14 is also connected. The inputs of the amplitude selectors 4 and 5 are connected and connected to the line voltage of the tested generator 1 . To the control inputs of the indicated amplitude selectors 4 and 5 and the switch of the mains voltage 2, the output RS of the flip-flop 13 is connected.

Amplitude selector maximum voltage 4 and amplitude selector minimum voltage 5 solve the problem of amplitude selection

251232

13 is connected to the control inputs of the amplitude selectors D and 5 and the three-phase switch 2 of the mains voltage. The device makes it possible to increase the measurement accuracy due to a more accurate fixation of the moment of voltage passing to the generators through a maximum. 1id.

pulses, i.e. From the voltage of a certain form, the maximum and minimum stress values are selected and memorized. They are built on the principle of peak voltmeters.

Analog measuring element 6 is the organ measuring the voltage difference. Voltmeters or galvanometers of various systems can be used as such an organ.

Control element 14 is a control unit providing a predetermined algorithm of the device operation, and is complete either on relay elements or integrated circuits.

When loading the generator voltage on the generator V E.,,

 Xj + x

where E -. EMF idling;

K - load resistance; X, - synchronous inductive co. resistance of synchronous in-pole machine along the longitudinal axis

I, 1 -gr - inductive resistance

reaction generator core along the longitudinal axis; K is the coefficient determined by the type and design of the generator;

f is the feeding frequency; About the size of the air gap. The device operates as follows.

After the tested generator 1 reaches the nominal voltage and frequency, the operator switches on the control element 14. The signal from the control element 14 allows the signal to pass through the first input of the OR-NOT 12 logic element and switch the RS trigger 13. As soon as the values of two linear voltages To which the isolation transformers 7 and 8 are connected, are compared, which corresponds to the maximum value of the third linear voltage, the voltage on the base of the transistor I1 becomes zero and the transistor 1 closes. A logical unit signal is applied to the other input of an OR-NOT 12 logic element and, consequently, its output is a logical zero signal that RS trigger 13 switches. The signal from trigger 13 gives the command to turn on the network voltage switch 2 and the command to enable operation amplitude selectors A and 5, which fix the maximum value of the voltage before switching on the load and the minimum value of the voltage at the first moment of switching on. These two signals are sent to the analog measuring element 6, which shows the difference between these voltages, and, after fixing the minimum voltage value, the command is sent to turn off to the control element 14, from which the signal to prohibit the signal from passing through the logical element OR NOT 12 and the RS trigger 13 is switched to the initial state. After that, the network switch 2 is disconnected and the signal is prevented from cooling through the information inputs of the amplitude selectors A and 5. Using the analog measuring element 6, the voltage change is compared, which is compared with c. The reason for the nominal voltage variation and the difference between these values is the output of the deviation of the air gap size from the nominal value without directly determining the gap size.

The device allows to increase the measurement accuracy at the expense of more accurate Compiler A. Nikanorov

Editor I. Segl nick Tehred V. Kadar.

Order 4421/53 Circulation 631 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

fixing the moment of passage of voltage on the generator through a maximum.

Claims (1)

5 claims 0 s 0 five 0 five 0 Synchronous c) a topolar generator with a device for controlling the change in the size of the air gap, containing a three-phase mains voltage switch with a control input, connected by input terminals to the generator windings, and output terminals to the active-inductive load, amplitude selectors of maximum and. minimum voltages, the inputs of which are combined and connected to the same linear voltage of the generator, and the outputs are connected to two inputs of the analog measuring element, and the output of the amplitude selector of the minimum voltage is connected to the input of the control element, which is different in that control, additionally introduced a logical element OR-NOT, RS trigger, two separator Hbjx transformer, resistor, diode and transistor, while the dermal windings of the isolating transformers are connected to and other linear circuits of the generator, and the secondary windings are interconnected in succession and their free one through a resistor, and the second through a diode connected to the base of the transistor whose emitter is grounded, and the first input of the logical element OR NOT, the second input of which is connected to the collector connected to the output of the control element and to one of the RS inputs of the trigger, to the input of which there is connected the output of the logical element SH-NOT, ai output RS of the trigger is connected to the control inputs of the amplitude selectors and three phase AC voltage switch. Proofreader E. Roshko