SU744739A2 - Magnetic core testing device - Google Patents

Description

one

The invention relates to computing, in particular, to technological equipment for monitoring electromagnetic parameters of magnetic cores.

According to the main author. St. No. 526955, a device for monitoring magnetic cores is known, comprising a primary and auxiliary step voltage generators, an integrator, a code-current converter, control units, a counting pulse generator, the output of which is connected to the first inputs of the main stage-voltage generator and a code-current converter, second the inputs of which are connected to the outputs of the control unit, the input of the integrator is connected to whose output to the measuring unit and to one output of the code-current converter, the other outputs of which are connected according to the input inputs of the step voltage generators and one of the control units, and the integrator output is connected to the first input of the switch, the second input of which is connected to the output of the auxiliary step voltage generator, and the output to one input of the comparator, the other input of which is connected to the first output the main generator of step voltage, the second output of which is connected to the input of another control unit and the output of the auxiliary step voltage generator, the outputs of the control units are connected to the inputs of the executive unit (I j.

For the calculation of electrical circuits containing magnetic cores, as well as for a qualitative assessment of the electromagnetic parameters of the cores when developing the production technology of cores

10 to know, in addition to the absolute values of the measured parameters, ACt ,, (3W) c, (3W), (3W) numerical values of the normalized parameters.,. .

A (1U1 / b (3W) j $

yft (awjl t3Wjc

15

In the known device, the cores are scored according to the normalized parameters fiwvf only. Signals “Goden-Marriage. The numerical value of each normalized parameter is determined separately after measuring and recording the absolute values of the components of the normalized parameters A), {3W) c, (IW) T, (JW), which with the current 100 ° control pair meters of cores form an essential part of the control process.

The aim of the invention is to expand the functionality of the device, by controlling the cores according to normalized "parameters:

The goal is achieved in that the device contains a unit for estimating the values of the normalized parameters containing a key, divider and a divider channel switch, the first and second inputs of the divider channel switch are connected to the outputs of the main and auxiliary step voltage generators, and the outputs of the divider channel switch are connected to the corresponding inputs of the key, the control input of which is connected to the output of the execution unit, and the outputs with the corresponding inputs of the divider.

FIG. 1 is a block diagram of an apparatus for monitoring magnetic cores; FIG. 2 is a block diagram of a divider.

The device contains a control unit, a generator of 2 remagnetizing current pulses, a code-current converter v3, an auxiliary generator of 4-step voltage, a measuring unit 5 with a measuring needle .:

The first generator 2 consists of a generator of clock pulses 6, a driver of 7 current pulses, and an input of which is selected. to winding 8 surveys of the core 9 core

Unit 1 contains an integrator 10, a unit P of comparison, a main generator of 12 step voltage, a logic unit 3, a generator of counts of pulses.

The main generator 12 consists of a first counting register 15 with digital indication, logical keys. 16 n 17 and a code-voltage converter 18. .

The code-current converter 3 consists of a second counting register 19 with digital indication, logical switches 20 and a resistor matrix 21..

Block 1 also contains gating block 22, switch stitch 23, logic block 13, blocks 24 and 25 of the tontrol, block 2 (5 controls and executive unit 27.

a.v -..-- a flexible 4-step voltage generator consists of a trigger register 28, logic, cells 29 and 30, a code-voltage converter 3.

The block 32 of the values of the normalized parameters -I-, pll / consists of the switch of the channels divider 33, key 34 and divider 35,; ,

A divider 35 (FIG. 2) contains a comparison device 36 integrating RC circuits 37, 38, transistor switches 39, 40, a driver control pulse driver 41, a scale divider 4 and an amplitude meter 43.

ifta-- uh

ai; ha. „

itAKmibjKto.tVf

r: .. 744739

The device for monitoring magnetic cores in determining the numerical value of the normalized parameters works very little.

When sorting by parameter, the constant voltages Ut and Uj, corresponding to the values, from the output of the code-voltage converter 31 and AF „from the output prefin

the generator 1o the code-voltage is supplied through a switch of the divider 33, which ensures the condition of / / Ut /

(where Uj. and Ui are the voltages from the outputs of the converters 18 and 31 code-voltage necessary for the divider to work correctly, to the inputs to, key 34. According to the signals "Goden or" Marriage from the output of the executive

unit 27, the outputs of the switch channels divider 33 through the contacts of the key 34 are connected to the inputs of the divider 35.

When ensuring the conditions / Ui. and equality of products of 1st integrating chains 38 and 37 sawtooth voltage Uj

at the input of the scale divider 42 is proportional to the ratio of the input voltages

. ,/- -one:.--;

where Ui and Ui-npr. on the inputs of the divider; E- stabilized constant

voltage.

At the output of the scale divider 42, the division factor of which is equal, the amplitude of the sawtooth voltage is numerically equal to the ratio of the constant voltages - and, therefore, the magnitude of the normalized parameter |, which is fixed by the measuring instrument 43 amp.

As the amplitude meter 43, for example, a pulsed digital voltmeter can be used.

The determination of the numerical value of the normalized parameters — and differ from the definition of the parameter —ff — only by the values of the components of the normalized parameters.

Determination of the numerical value of the unspecified parameters, {3gi, S1 | It takes up to the time for monitoring the electromagnetic parameters of the A.F. cores, (3wK, (3w) ,,, gWJx,

The use of the present invention allows to automatically obtain the numerical value of the normalized parameters, which reduces the laboriousness and duration of the process of monitoring cores by 2 times.

Claims (1)

Invention Formula A device for monitoring magnetic cores auth. St. No. 526955, characterized in that. in order to expand the functionality of the device, by agl-aggy Shg controlling the cores PB to normalized parameters, it contains a block for estimating the values of normalized parameters containing a key, divider and switch of the divider channels, the first and second inputs of the divider channel switch being connected to the outputs of the main and auxiliary step voltage generators connected to the corresponding inputs of the key, the control input of which is connected to the output of the execution unit, and the outputs from the corresponding inputs mi divider. Sources of information taken into account in the examination I. USSR author's certificate No. 526955, cl. G M S 29/00, 1975. fae 2