SU789974A1 - Device for plotting dynamic inductance characteristic - Google Patents

Description

The invention is fire retardant to electrical equipment and allows one to perform dynamic characteristics removal by experienced means, in particular, it allows one to remove the inductance characteristic of the electromagnetic elements of direct current when triggered. Devices are known for removing the dynamic characteristics of electromagnets comprising a movement sensor core and a computational circuit LlJ. Synthetic devices for dynamic characteristics are also known, containing a strain gauge co-op and an impulse circuit for G2 and GzT. The closest in technical essence to the present invention is a device for capturing dynamic characteristics, comprising a CRP position sensor, a computational circuit and an electron-beam oscilloscope with memory 4. However, due to the position of the position sensor on the moving core desired, which affects the measurement results. The purpose of the invention is to improve the measurement accuracy and reliability of the device. For this purpose, two power sources are introduced into the device, an amplifier with resistance resistances at the input and output, the computational circuit is made in the form of two division units differentiating and integrating RCnue children. The position sensor core is made in the form of a Hall element, the output of which is connected to the input of one division unit. Each power source is connected in series with the resistive resistance at the input and output of the amplifier, so that in one case it forms a chain, one output of which is intended to be connected to the excitation winding of the tested direct current electromagnetic element, and the other is connected to the input terminal of another target unit, the other terminal This input is intended to be connected to the excitation winding of an electromagnetic element of a direct current, a chain formed of a series-connected resistor at the output of the ycHnk bodies and the power source, is connected at the input of the differentiating J C value, the output of which is connected to another input of the same dividing unit, its output is connected to the input of the electron beam oscilloscope with memory, the output of the Hall element is connected to the input of another dividing unit, the other input of this healing unit is connected to the resistive resistance and the capacitance of the differentiating chain connected in series, the output of this dividing unit cuts the integrating price -chain connected to the input of the electronic 41 oscilloscope and fa.

The drawing shows the proposed my device.

The device consists of an electromagnetic element EL, a voltage amplifier Y, an integrating magnetic flux chain of the first magnetic inductance dividing unit, a sensor for the position of the second dividing unit, an integrating path chain, and an ELO memory oscilloscope.

In addition, the device contains 5 measles of the electromagnetic element, C - the core of the electromagnetic atement, - the upper stop, IV lower ynopj PP counteracting spring,) the field of excitation of the electromagnetic element, K - switch (switch), Rk - additional ohmic resistance at the amplifier input | voltage, cd. - the ohmic resistance of the second input of the target unit, y is the ohmic resistance at the output of the voltage amplifier in the voltage chain, H A is the Hall meter, with Hm the power source of the load circuit of the Hall meter, Crewe is the adjustment ohmic resistance in the load circuit of the Hall meter, C is the capacity of the integrating chain of the magnetic flux chain.

ohmic resistance

laziness

integrals, magnetic chains; , potokstepleniya, C - e dko, integrating chain of pugs, ohmic resistance of the integrating chain of paths, PI - power source, goy power source (doubler).,

The device is static only.

899744

Under the action of the counter-spring amplifier, the bark of the electromagnetic element is pulled to the upper stop, and the field winding is connected up to 5, consequently, with the additional ohmic resistance at the input of the voltage amplifier and the ohmic resistance of the second input of the first dividing unit.

The output of the voltage amplifier includes the ohmic resistance of the voltage chain, which is connected in series and counter to the power supply doubler. The voltage chain is connected to the input of the integrating magnetic flux chain and the first input of the second dividing unit, and the output of the integrating magnetic flux chain is connected to the first input of the first dividing unit. A position sensor / core with a Haal meter is located on the core, while the adjustment ohmic resistance and the power source in the load circuit of the Hall meter are connected in series. The load circuit of the Hall meter is connected to the second input of the second unit, and the output of the second division unit is connected to the input of the integrating path chain. The output of the integrating chain of the path is connected to the first input (abscissa axis) of the electron-beam oscilloscope with memory, with the second input of which (ordinate axis) the output of the first division unit is connected.

The operation of the device is as follows.

When the switch is turned on, the voltage of the power supply of the excitation winding of the electromagnetic element is turned on, which creates a magnetic current and the core is attracted to the lower stop. The operation of the device here is carried out in the dynamic mode described by the equations of dynamics.

A voltage proportional to the voltage drop on the ohmic resistance of the excitation winding of the electromagnetic element EL, is supplied to the input of the voltage amplifier from whose output the voltage is removed, equal to the voltage drop on the ohmic resistance of the electromagnetic element ELN, equal to the voltage of the change. - neither the magnetic flux linkage in time, is applied to the first input of the first dividing unit and the internal 1 C chain, from the output of which the voltage is removed,

proportional to the magnetic flux grip, and fed to the first input of the first dividing unit, to the second input to the mountain a voltage proportional to the current in the excitation winding of the electromagnetic element PL is applied.

From the output of the start-up circuit of the Hall meter of the sensor for the QY box, the voltage proportional to the magnetic induction is removed and fed to the HY input of the second dividing unit.

From the output of the second dividing unit to the input of the integrating chain of the Rcu-ft path, a voltage proportional to the speed of the electromagnetic elec- tronic element MeiJTB is applied, and from its output the voltage proportional to the coordinate of the path (displaced) core and the first input (abscissa axis) erectron beam oscilloscope |) and with memorization

The ELO, to the second input of which (the oro dynat axis), from the output of the first dividing unit, applies a voltage proportional to the inductance.

Claims (4)

1. USSR author's certificate nd 325597, cl. (05V 23 / 02.4970. 2. USSR author's certificate K 595707, cl. (.05 B 23/02, 1976. 3. Determination of the dynamic characteristics of the AC contactor. M., Electrosila, 1970, № 28. 4. Author's USSR Inscription No. 164362, cl. (ABOUT 23 / O2, 1963. ////////// . VU 8U //////// WITH . / /////// // t -.KIIII - o- H -0hl tsht 5U1 0 L / A L AND .: / / V v V -CH-o-o-4 | -oJ about y 6 I, (HZZZD-CKH 6O-J g / l.