SU773574A1 - Apparatus for recording dynamic inductance characteristic - Google Patents

Description

(54) DEVICE TO REMOVE DYNAMIC INDUCTIVE CHARACTERISTICS

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The invention relates to electrical engineering and allows one to relieve dynamic characteristics empirically, in particular, allows one to remove the inductance characteristic 5 of the electromagnetic elements of a direct current when triggered, depending on the path.

A device for capturing the dynamic characteristics of electromagnets, comprising a sensor for moving the core and a computational circuit 1, is known.

Also known are devices for capturing dynamic characteristics containing a strain gauge displacement p and a computational circuit 2 and

Closest to the present invention is a device for taking dynamic characteristics, comprising a core position sensor, a computing circuit, and an electron beam oscilloscope 4.

However, due to the fact that the core position sensor is placed on the movable part of the magnetic sistek, there occurs a 25 mass increase of the core itself, especially significant with an insignificant mass of the core itself, which in turn creates significant errors in the construction of 30

inductance of the electromagnetic element of direct current.

The purpose of the invention is to improve measurement accuracy and reliability.

This is achieved by the fact that the core position sensor is made as a Hall element and is designed to be placed on a stationary core, a shunt resistance and a power source are inserted into the device, which are intended to be connected to the excitation winding of the constant-current electromagnetic element, and and an integrating chain and two dividing units, while the load circuit of the Hall element is connected to one of the inputs of the first dividing unit, the second input of which is connected to the shunt and an output with an integrating chain, vb: the input of which, in turn, is connected to one of the inputs of the electron-beam oscilloscope, the other input of this oscilloscope is connected to the output of the second division unit, the output of the differentiating chain is connected to one input of the division unit, which is connected with the shunt resistance, another input of the second dividing unit is connected with the source and the shunt resistance,

FIG. 1 is a schematic diagram of the device, FIG. 2 is a plot of dynamic inductance.

The diagram shows an electromagnetic element 1, an electron-beam oscilloscope with memory 2, measles 3 of an electromagnetic element, core 4 of an electromagnetic element, upper stop 5, counter-action of a spring 6, X is the coordinate of the path (displacement) of the core when released, winding 7 of the excitation of the electromagnetic element, R - the ohmic resistance of the field winding, the inductance of the electromagnetic element when released, the collider (ejector) 8, E - the electromotive force of the power source, Rj, - the shunting ohmic resistance e, the first block of 9 division, C - capacity of the differentiating chain of magnetic flux “5elenia | ft is the mass resistance of the magnetic flux linking differentiating circuit, XA Hall meter for determining the magnetic induction, -adjusting ohmic resistance in the control circuit of the Hall meter xL, second dividing unit 10, power source in the load circuit of the Hall meter, Rpj - adjusting O1ic resistance in the load circuit Hall meter XX, C - ilknost integrating chain path (displacement) core, Rj, - ohmic resistance of the integrating chain path (displacement) core.

The anchor of the electromagnetic element under the action of electromagnetic force is pulled to the bottom stop.

The excitation winding of the electromagnetic element is connected in series with the second impedance of the second input of the dividing unit. They are connected in parallel with a power source with a switch and a shunting less than ohmic resistance, which is connected to the input of an integrating magnetic flux chain, the output of which is connected to the first input of the unit.

The core position sensor is located on the core of the electromagnetism element and has a Hall meter, Adjustment interface and power supply in the load circuit of the Hall meter connected in series.

A control ohmic resistance is included in the control circuit of the Hall meter.

The output of the load of the Hall meter is connected to the second input of the first division unit, to the first input of which the shunt is connected is the ohmic resistance. The output of the second division unit is connected to an integrating path chain, the output of which is connected to the first input (abscissa axis) of the electron-beam oscilloscope with memory, the second input of which (axis of ordinates) is connected to the output of the first division block.

The device is working; the next image is om.

When the switch is turned off, the magnetic flux linkage is reduced and the measles under the influence of the return spring abuts against the top stop.

The operation of the device in this case is carried out in a dynamic mode.

From the shunt resistive ohmic resistance of the field winding, a voltage proportional to the rate of change of the magnetic flux linkage in time is fed to the first inputs of the dividing unit of the first and dividing unit of the second, as well as to the input of the differentiating chain of the rate of change of magnetic flux Ci, RJ, from the output of which the voltage is removed proportional to the rate of current change over time and fed 5 to the second input of the dividing site of the first. Voltage proportional to the magnetic induction is removed from the load circuit of the Hall meter of the sensor of the core, and is fed to the second input of the second dividing unit, the output of which relieves voltage proportional to the speed of the core and is fed to the input of the integrating chain.

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From the output of the integrating chain

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and C, is taken, for example, proportional to the coordinate of the puny,

This (first) bark of an electromagnetic element of direct current and is fed to the first input (abscissa axis)

0 a memory oscilloscope with a memory, the second input of which (axis of ordinates) from the output of the division unit is supplied with a voltage proportional to the dynamic inductance.

Claims (4)

Invention Formula A device for characterizing dynamic inductance for electromagnet elements of direct current when released, comprising a core position sensor, a computational circuit, and an electron-beam oscilloscope with an IAN-nanometer band, characterized in that, in order to increase accuracy and reliability, it contains a power source and a shunt resistance, intended for the parachute connection to the excitation winding of the electric vehicle and the connecting element and connected in parallel. among themselves, the core position sensor is made in the form of a Hall element intended to be placed on a non-SUPPORTING Core 1 electromagnetic element, the computational scheme made of two dividing units, differentiating and integrating JC chains, with the output of the Hall element connected to the input of the first dividing unit, the input of the dividing unit connected to the shunt resistance, the output of the first dividing unit through the integrating chain to the input of the electron-beam oscilloscope, another input which is connected to the output of the second dividing unit, one input of the second dividing unit is connected to the output of the differential circuit, the input is connected to the shunt resistance, and the second input of the second a dividing unit is associated with a power source. Sources of information taken into account in the examination - 1, USSR Author's Certificate 325597, cl. G 05 B 23/02, 1S7C. 2. Artorskoe certificate of the USSR 595707, cl. G 05 B 23/02, 1976. 3. Determination of the dynamic characteristics of the AC contactor. M., Electrosila, 1970, 28. y 4. USSR author's certificate number 164362, cl. G 05 B 23/02, 1967.