A 0.018 %/V Line Sensitivity Voltage Reference With -82.46 dB PSRR at 100 Hz for Bio-potential Signals Readout Systems

This document presents the results obtained from the application of the law of Lens to correctly identify the polarity of the windings in a three-phase motor with 6 exposed terminals, when the corresponding labeling is not in any situation; Prior to identifying the polarity, it should be considered to have the pairs of the three windings located. For the polarity, it is proposed to feed with a voltage of 12 Vrms to one of the windings, which are identified randomly as W1 and W2, where W1 is connected to the voltage phase of 12 Vrms of the signal and W2 to the voltage reference to 0V; by means of voltage induction and considering the law of Lens, the remaining 4 terminals can be identified and labeled as V1, V2, U1 and U2. For this process a microcontroller and control elements with low cost are used.

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Battery Losses In a MMC for BEVS Application

The Open Electrical & Electronic Engineering Journal ◽

10.2174/1874129001812010098 ◽

2018 ◽

Vol 12 (1) ◽

pp. 98-109 ◽

Cited By ~ 1

Author(s):

Adolfo Dannier ◽

Gianluca Brando ◽

Ivan Spina ◽

Diego Iannuzzi

Keyword(s):

Mathematical Model ◽

System Architecture ◽

Electrochemical Cell ◽

Voltage Source ◽

Modular Multilevel Converter ◽

Voltage Reference ◽

Sinusoidal Voltage ◽

Current Waveform ◽

Voltage Source Inverter ◽

Multilevel Converter

Objective:This paper analyses the Modular Multilevel Converter (MMC) topology, where each individual Sub Module (SM), in half bridge configuration, is directly fed by an elementary electrochemical cell.Methods:The aim is to investigate how the reference voltages influence the cells currents waveforms, determining how the active powers and the losses are distributed among the cells. Considering a 2-level Voltage Source Inverter (VSI) topology working in the same conditions, the ratio between the MMC total cells losses and VSI total cells losses is calculated. After showing the system architecture and mathematical model, the cells current waveform investigation is presented and detailed both for triangular and sinusoidal voltage reference waveform.Results:Finally, the results are critically discussed with particular focus on the comparison between the MMC and the VSI topologies.

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Continuous Control Set Predictive Current Control for Induction Machine

Applied Sciences ◽

10.3390/app11136230 ◽

2021 ◽

Vol 11 (13) ◽

pp. 6230

Author(s):

Toni Varga ◽

Tin Benšić ◽

Vedrana Jerković Štil ◽

Marinko Barukčić

Keyword(s):

Control Method ◽

Induction Machine ◽

Current Control ◽

Continuous Control ◽

Loop Model ◽

Voltage Reference ◽

Control Loop ◽

Speed Tracking ◽

Finite Control ◽

Control Set

A speed tracking control method for induction machine is shown in this paper. The method consists of outer speed control loop and inner current control loop. Model predictive current control method without the need for calculation of the weighing factors is utilized for the inner control loop, which generates a continuous set of voltage reference values that can be modulated and applied by the inverter to the induction machine. Interesting parallels are drawn between the developed method and state feedback principles that helped with the analysis of the stability and controllability. Simple speed and rotor flux estimator is implemented that helps achieve sensorless control. Simulation is conducted and the method shows great performance for speed tracking in a steady state, and during transients as well. Additionally, compared to the finite control set predictive current control, it shows less harmonic content in the generated torque on the rotor shaft.

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