Diseño de un sistema de medición de Corriente en Motor de Plasma con Bobina Rogowski
(Design of a Current Measurement System in a Plasma Thruster with Rogowski Coil)
Roque O. De Alessandro (email@example.com), María D. Vélez Ibarra (firstname.lastname@example.org), Héctor H. Brito (email@example.com)
Instituto Universitario Aeronaútico
This paper appears in: Revista IEEE América Latina
Publication Date: Feb. 2013
Volume: 11, Issue: 1
The development of plasma thrusters for
microsatellites is mostly based in intensive testing, so the
implementation of measurement devices for characterizing their
real response is required. One of the most significant parameters
is the current flowing through the plasma at the time of ignition;
its quantification requires an instrument capable of measuring
current peaks between -14 kA and +10 kA, without interrupting
the circuit that produces it.
That's why a Rogowski coil has been chosen as the ideal
measurement method. When the coil is mounted around the
conductor carrying the current to be measured, it produces a
voltage proportional to its derivate. Using an operational
amplifier, adapted to the discharge current frequency of the
plasma generating circuit, an active integration of the Rogowski
coil output signal is performed.
The work begins by defining the Rogowski Coil
characteristic parameters and the integrator circuit which
converts its output to a signal proportional to the measured
current. Subsequently, the related hardware is implemented and
functional tests are performed.
High current, integrator, Measuring system, Plasma Thruster, Rogowski Coil
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