SU1661691A1 - Method of testing electrical commutation means and device for - Google Patents

Abstract

The invention relates to electrical measuring equipment and can be used to test electrical switching devices, such as electromagnetic starters. The purpose of the invention is to increase the reliability of control and reduce power losses, as well as expand the scope of application — in that, in a known method, the apparatus under test is turned on for a rotating load electric motor, in which a change in counter EMF is obtained by controlling the magnetic flux. A device that implements this method contains a load motor 2 with excitation winding 5, a generator 3 with excitation winding 17, regulators 4, 16 current, current sensor 6, power source 7, drive motor 8, auxiliary resistor 9, connected to the device under test 1 the clock generator 10, the delay element 11, the elements 12, the counter 13 with the decoder, the programmable amplifier 14 and the sensor 15 of the reference voltage. 1 il.

Description

The invention relates to an electrical measuring technique that can be used for testing switching devices, such as electromagnetic t-accelerators.

The aim of the invention is to increase the reliability of control and reduce power loss, as well as expanding the scope.

The essence of the proposed method lies in the fact that the testing of an electrical switching apparatus on switching on and off-Ki is performed with a Trovsomioro transient teller, which is easy to find with the generator, and the change of the protpv EMF is required for the required electrical generator. Mtccnging mmpa-ta achochlol PICT by means of magnetic flux control.

EP eptege is shown by troigstp for carrying out the proposed method.

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The device contains a load motor 2, a generator 3, the first current controller 4, the excitation winding 5 of the load motor 2, the current sensor 6, the power source, the drive motor 8, the additional resistor 9, the clock generator 10, the delay element 11, connected to the test apparatus 1, elements 12, a counter 13 with a decoder, a programmable amplifier 14, a voltage sensor 15, a second current controller 16, an excitation winding 7 of the generator 3.

Moreover, the generator 3, the load electric motor 2 and the driving electric motor 8 are on the same shaft, the apparatus under test is connected to the first and second terminals of the generator 3 by the first and second input terminals, and the first output terminal is connected to the first terminal of the load electric motor 2 The second terminal of which through the current sensor 6 is connected to the second output terminal of the apparatus under test 1, the control input of which is connected to the output of the element 12, the first input of which is connected to the output of the generator 10 and the input of the delay element 11, the output of the latter is connected to the input of the counter 13 with a decoder, and the outputs of the counter are connected to the second inputs of the elements 12 and the inputs of the programmable amplifier 149 connected between the current sensor 6 and the first input of the current regulator 4, The second input of which is connected to the output of the sensor 15 of the reference voltage, the sensor inputs are connected to the corresponding outputs of the counter 13 with the decoder and the inputs of the second current regulator 16, the output of which is connected to the excitation / generator winding 3

The device works as follows

The clock generator 10 generates square voltage pulses. From the output of the delay element 1, the rectangular voltage pulses with their decay switch the counter 13 with the decoder. The signal from the output of the counter 13 with the decoder gives permission to the first input of one of the elements And | 2 with the arrival of a positive pulse from the clock generator 10 to the second inputs of the elements And 12 the corresponding subject is switched on

the device 1, when it is turned on, the process of increasing the back emf of the load motor 2 by means of a signal fed to the excitation winding 5 of the load motor 2 from the current sensor 6 and amplified by the current regulator 4 occurs. For each device under test, their own additional resistors 9 are connected, the programmable amplifier 14, the sensor 15, the reference voltages, and the second current regulator 16 are individually tuned. The test apparatus 1 is disconnected at the time of the fall of the pulse produced by the clock

0 by the generator 10. The delay element 11 provides the transfer of the counter 13 with the decoder and, accordingly, the programmable amplifier 14, the sensor 15 of the reference voltage and the regulator

5 16 current to turn off the included test apparatus 1 and thereby prepares the device to turn on the next test apparatus 1.

0 Using the proposed method allows to reduce power consumption, increase the reliability of control and expand the scope.

35

formula of invention

Claims (4)

1. A method of testing an electrical switching apparatus by switching on and off to the power source of a load electric motor on the same shaft with a generator under test, which is different 5 by the fact that, in order to increase the reliability of the control, switching on the tested apparatus is carried out on a rotating load motor, in which the change in counter-electromotive force is obtained by controlling the magnetic flux. 2. A device for testing an electrical switching apparatus, containing a load electric motor, the power terminals of which are connected to the output terminals of the apparatus under test, and a generator located on the same shaft as the electrical 16 A motor, characterized in that, in order to increase the reliability of control and reduce power loss, a first current controller, a load electric motor, a current sensor, a generator, a drive motor are inserted into the device, the output of the first current regulator being connected to the excitation winding of the load electric motor, and the first input is connected to the current sensor included in the power supply circuit of the load electric motor, the power terminals of the generator are connected to the input terminals of the device under test, the power source is connected to the input terminals of the apparatus under test or with a drive motor located on the same shaft with the load electric motor and generator. 3. The device according to claim 2, characterized in that, in order to expand the scope of application, contains additional resistors connected between the output terminals of the test 91 & apparatus and a load motor. 4. The device according to PP. 2 and 3, characterized in that, for the purpose of expansion - the field of application, a clock generator, a delay element, And elements, a counter with a decoder, programmable are entered into it an amplifier, the clock generator is connected to the input of the delay element and the first inputs of the I elements, the outputs of which are connected to the control inputs of the devices under test, the input of the counter with the decoder is connected to the output of the delay element, and the outputs are connected to the second inputs of the And elements and the control inputs of the programmable an amplifier connected between the current sensor and the first input of the first current regulator, the reference voltage sensor, the output of which is connected to the second input of the first current regulator, the second current regulator, you od whereinto g 5 th is connected to the excitation winding of the generator. 0 sh