Electrical Engineering: Recent submissions
Now showing items 721-740 of 2649
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Digital control for UPS inverters
( IEEE , 2003 , Conference Paper)PWM inverters digital controls with dead-beat re sponse, for UPS applications, are reviewed. To improve the output waveforms of the PWM inverter, several modern control techniques are applied together with the deadbeat ... -
A Novel Resolver-to-360° Linearized Converter
( IEEE , 2004 , Article)A novel and simple resolver-to-dc converter is presented. It is shown that by appropriate processing of the sine and cosine resolver signals, the proposed converter may produce an output voltage proportional to the shaft ... -
Precise method for linearizing sine and cosine signals in resolvers and quadrature encoders applications
( IEEE , 2004 , Conference Paper)Resolvers and quadrature encoders provide electrical signal related to the sine and cosine of the mechanical shaft angle over the full 360 degree range. A converter is described for the linearization of these signals, ... -
A high precision resolver-to-DC converter
( IEEE , 2005 , Article)A newly developed resolver converter, providing a pseudolinear voltage proportional to the shaft angle, is presented. This converter is based on a new concept involving the absolute values of the demodulated sine and cosine ... -
A novel multilevel carrier-based PWM-control method for GTO inverter in low index modulation region
( IEEE , 2006 , Article)Gate turn offs (GTOs) have an inherent minimum ON-OFF time, which is needed for their safe operation. For GTO-based three-level or neutral-point-clamped (NPC) inverters, this minimum ON-OFF pulsewidth limitation results ... -
A neutral point voltage balancing method for multi-level GTO inverters
( IEEE , 2006 , Conference Paper)The balancing problem of the DC-link capacitor voltage is inherent in the NPC inverter. It is extremely important to keep the upper and lower DC-link capacitor voltages balanced to guarantee the three level operation of ... -
A novel converter for sinusoidal encoders
( IEEE , 2006 , Conference Paper)The paper presents a novel and low cost method for determining the angle from sine and cosine signals generated by angular position sensors such as resolvers and sinusoidal encoders. The proposed scheme is based upon the ... -
A novel method for estimating the angle from analog co-sinusoidal quadrature signals
( Elsevier , 2008 , Article)The paper presents a new low cost and accurate method for determining the angle from sine and cosine signals produced by resolvers and sinusoidal encoders. In the proposed scheme, multiple phase-shifted sinusoids (PSS) are ... -
A new angle determination method for resolvers
( IEEE , 2008 , Conference Paper)A new low cost method for converting the amplitudes of the sine/cosine signals generated by the resolver into a measure of the angle of its shaft. The new method operates without lookup tables (LUT), and takes advantage ... -
Real Time Digital Feedback Control for VFD fed by cascaded multi-cell inverter
( IEEE , 2010 , Conference Paper)Multi-cell inverter include an array of single-phase inverters capable of handling higher voltage ratings with lower rating power electronics devices. In this paper, a Real Time Digital Feedback Controller (RTDFBC) combined ... -
A new PLL method for resolvers
( IEEE , 2010 , Conference Paper)This paper describes a novel implementation of the classical PLL closed loop method without using VCO, DAC, counter and look-up tables. The proposed method makes use of the excitation signal of the resolver to estimate the ... -
Development of a grid connected photovoltaic power conditioning system based on flying capacitors inverter
( IEEE , 2011 , Conference Paper)In an effort to utilize the solar energy effectively through power electronics converters (conditioners), a great deal of research is being carried out to meet the increasing demand for load. This paper proposes an ... -
Deadbeat control with multi-sampling compensation for medium-voltage motor drives by cascaded multi-cell inverter using FPGA based hardware controller
( IEEE , 2011 , Conference Paper)Multi-cell inverter include an array of single-phase inverters capable of handling higher voltage ratings with lower rating power electronics devices. In this paper, a deadbeat control combined with a multi-sampling ... -
Experimental photovoltaic power supply based on flying capacitors multilevel inverter
( IEEE , 2011 , Conference Paper)Nowadays, a great deal of research is being carried out to utilize the solar energy effectively through power electronics converters (conditioners) to meet the increasing demand for load. In this paper, a weighted Real ... -
An original controller design for a grid connected PV system
( IEEE , 2012 , Conference Paper)PV energy generation has been one of the most active research areas in the past decades due to its inexhaustibility and environmental-friendly aspects. However, the great deal is to utilize the solar energy effectively ... -
An improved SVPWM method for multilevel inverters
( IEEE , 2012 , Conference Paper)This paper proposes a new general Space Vector PWM (SVPWM) method for Multi-Level Inverters (MLI) based on a generalization of dwell-times calculation. The presented scheme is developed for Cascaded H-Bridge (CHB) inverter. ... -
A wavelet-based passive islanding detection technique
( IEEE , 2012 , Conference Paper)Distribution power systems are radial in nature. Power flows in one direction from the utility to the load. Most protection, monitoring, and control devices are designed based on this unidirectional flow of power. Distributed ... -
Multilevel cascaded Z source inverter for PV power generation system
( IEEE , 2012 , Conference Paper)The paper investigates the use of multilevel cascaded Z source inverter (MC-ZSI) for photovoltaic (PV) power generation system. The control of the proposed system will take into account the multilevel modulation scheme and ... -
An improved predictive control approach for Multilevel Inverters
( IEEE , 2013 , Conference Paper)This paper proposes a flexible predictive control strategy for flying capacitors based Multi-Level Inverters (MLIs). The proposed controller, applied for a Flying Capacitors Inverter (FCI) and a Modular Multilevel Converter ... -
High-reliability extra-large motor drives for oil and gas industry
( IEEE , 2013 , Conference Paper)Oil and gas are the most important energy resources on the globe. They need to be transported to feed the energy to remote cities and towns. For efficient use of energy, variable frequency drives (VFD) are used in domestic ...