Measurement of the Current Transfer Function for Power Transducers of Current to Voltage

Baranov, Pavel; Borikov, Valeriy; Tsimbalist, E.I.

doi:10.4028/www.scientific.net/amm.756.615

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…The operating principle of the primary oscillation stabilization circuit with lock-in technique [18,19], shown in figure 7, is as follows. With MMG power on, the microcontroller sets the initial frequency and amplitude of voltages U 1 and U 2 using the digital-analog converters DAC 1 and DAC 2.…”

Section: Primary Oscillation Control Systemmentioning

confidence: 99%

The stabilization system of primary oscillation for a micromechanical gyroscope

Baranov

Nesterenko

Tsimbalist

et al. 2017

Meas. Sci. Technol.

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The mode of primary oscillations of a micromechanical gyroscope (MMG) sensor is provided by an electrostatic comb-drive actuator in which the interaction between the micromechanical structures and electronics occurs by means of a single or differential capacitive sensor. Two pairs of capacitive sensors are traditionally used for frequency stabilization of MMG primary oscillations. The first pair of capacitive sensors excites primary oscillations, while the second measures the amplitude of primary oscillations. The stabilization system provides a continuous frequency tuning of primary oscillations that increases the duration of transition processes, the time of operational readiness, and the instability of the output signal from the secondary oscillation channel of the MMGs. This paper presents a new approach to the primary oscillation control system of the two-component MMG. The method of calculating the natural resonant frequency is based on measurements of the total current passing through the comb-driver actuator capacitances, and a lock-in detection is suggested. This paper consists of the results of the numerical analysis, the description of the proposed approach to the frequency control of the primary MMG oscillations, and the Simulink model of the behaviour of the MMG stabilization system, depending on its mechanical-and-physical properties with regard to a 2% shift of the natural resonant frequency. The frequency control of the primary oscillations at 2% frequency detuning is performed within 0.11 s.

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Section: Primary Oscillation Control Systemmentioning

confidence: 99%

The stabilization system of primary oscillation for a micromechanical gyroscope

Baranov

Nesterenko

Tsimbalist

et al. 2017

Meas. Sci. Technol.

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“…At the same time, DC current measurement is becoming more important. [6][7][8][9][10] Usually, DC current measurement methods generally include shunt resistance method, 10 DC transformer method, 11 DC comparator method, 12,13 Hall element method, 14 DC fluxgate sensor method, 15 circular magnetic field sensing method, 16 and optical fiber sensor method. [17][18][19][20] Magnetic fluid is a solid-liquid mixture system, in which the strong magnetic particles are mixed into the base carrier liquid, and then surfactant is added to disperse the magnetic particles in the base carrier liquid uniformly.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the DC current based on magnetic fluids with an orthogonal magnetic field

Zhang

Che

Wang

et al. 2020

Measurement and Control

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Measurement of DC current is critically important in a wide range of applications, such as in photovoltaic power generation and DC power transmission. In this paper, the DC current measuring method based on magnetic fluids with orthogonal magnetic fields is studied. Firstly, the induced voltage of measurement coil, which contains a series of harmonics and the amplitude of its fundamental component is 2.5 times larger than that of other components, is derived and analyzed. Then, influence factors of the induced voltage are systematically studied. As a result, with a DC component injection into the exciting current, the frequency of the induced voltage becomes a half of that without a DC component, and when the DC component reaches to or exceeds the amplitude of the AC component, the induced voltage nearly has no distortion. Finally, the input-output characteristic of the measurement method is examined, and the accuracy, measuring range, and sensitivity are discussed, indicating that the linearity of the foundamental component root mean square (RMS) value curve is better than the one of the voltage amplitude curve under the same DC current range, and the sensitivities of induced voltage amplitude and the fundamental component RMS value are 5.948 and 3.717 mΩ, respectively.

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“…Comparators capable of comparing two alternating signals of the similar frequency within a wide dynamic range of frequencies and voltages are lock-in amplifiers with a differential input [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Increasing common-mode rejection ratio based on the voltage follower

Baranov

Tsimbalist

Borikov

et al. 2016

2016 International Siberian Conference on Control and Communications (SIBCON)

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The paper presents certain procedures oriented towards the decrease of the uncertainty of measuring the small differential signal against a large common-mode signal. The technical implementation of the tracking symmetrical power supply is suggested for the instrumentation amplifier based on the voltage follower that allows increasing the common mode rejection ratio and input impedance and decreasing the cable capacitance. Keywords-voltage divider; lock-in amplifier with a differential input; common-mode rejection ratio

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Measurement of the Current Transfer Function for Power Transducers of Current to Voltage

Cited by 4 publications

References 15 publications

The stabilization system of primary oscillation for a micromechanical gyroscope

The stabilization system of primary oscillation for a micromechanical gyroscope

Measurement of the DC current based on magnetic fluids with an orthogonal magnetic field

Increasing common-mode rejection ratio based on the voltage follower

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