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Published in John G. Webster, Halit Eren, Measurement, Instrumentation, and Sensors Handbook, 2017
The Rogowski coil for measuring current is an air coil wound around the measured current conductor (Figure 16.3). The basic operating principle is given by the mutual inductance M between the primary (single turn) and the secondary (many turns). The output voltage is proportional to the derivative of the current: V(t)=M(dIdt)
Technologies for Electric Current Sensors
Published in Laurent A. Francis, Krzysztof Iniewski, Novel Advances in Microsystems Technologies and Their Applications, 2017
G. Velasco-Quesada, A. Conesa-Roca, M. Román-Lumbreras
The simplest design of a Rogowski coil is a solenoid placed around the primary current-carrying conductor. As shown in Figure 12.4a, an important feature of the solenoid construction is that the end of the wire used for the coil implementation is returned to the beginning via the central axis of the solenoid. If the Rogowski coil design does not incorporate this return loop, the sensor would be sensitive to magnetic fields perpendicular to the coil plane and, therefore, measurement errors may appear.
Force-System Resultants and Equilibrium
Published in Richard C. Dorf, The Engineering Handbook, 2018
Fundamentally, the properties of magnetic fields, electric fields, and heat can be used for currents sensing. In addition, any magnetic field sensor can be configured for current measurements. An example is the Rogowski coil, illustrated in Figure 158.3. The Rogowski coil is a solenoid air core winding of a small cross-section looped around a conductor carrying the current. The voltage induced across the terminals of the coil is proportional to the derivative of the current.
On the effects of circuit parameters on electrical behaviour of metallic powders subjected to high rate discharge compaction process
Published in Powder Metallurgy, 2020
A. Darvizeh, M. Alitavoli, N. Namazi
The discharge current was measured using a Toroidal Rogowski coil which surrounds the powder column. When the capacitor is discharged through the column, an e.m.f. is induced in the toroid which is proportional to the rate of current flow. Using a calibrated integrated circuit, the instantaneous current flowing through the powder column can be recorded on the oscilloscope. A shunt was used at relatively low current to calibrate the Rogowski coil. More details about measuring the capacitor voltage, discharge current, voltage drop across the column of powder and the corresponding current are given in [13].