A novel technique to estimate and model parameters of a 460-MVA large steam turbine generator from operating data is presented. First, data from small excitation disturbances are used to estimate linear model armature circuit and field winding parameters of the machine. Subsequently, for each set of steady state operating data, saturable inductances and are identified and modeled using nonlinea...

Experimental results are presented on microwave inductors, transformers, and transmission lines fabricated in an Si/SiGe heterojunction-bipolar-transistor process with standard metallization and a thick polyimide dielectric. Microstrip transmission lines with characteristic impedances from 44 to 73 , ’s from 10 to 14, and insertion losses from 0.11 to 0.16 dB/mm at 10 GHz are presented. Convent...

Insertion of a dc-dc converter between the automobile battery and electrical loads is proposed. This would allow gradual conversion to higher battery voltage, regulation of dc distribution voltage, and multiple distribution voltage levels. Switching loss arising from parasitic inductances is a serious problem in this application. The nonlinear resonant switch can remove this source of loss, ach...

This paper presents a sensorless control method and very fast on-line inductances identification of an IPMSM. The current slopes (derivatives) at one active-voltage vector zero-voltage are measured every PWM cycle to estimate the rotor speed position with aim increasing estimation accuracy reducing total harmonic distortion. In addition these slopes, DC bus voltage inverter is machine on-line. ...

abstract the temperature of water entering the soil or variation in soil temperature has a direct impact on soil hydraulic conductivity via the effect on water viscosity. in this research, the time variability of soil saturated hydraulic conductivity (ks) was studied. the relation between soil temperature and fluid viscosity with hydraulic conductivity were also studied. the necessary experimen...

In this paper techniques are described for coupled simulation of complicated 3-D interconnect and non-linear transistor drivers and receivers. The approach is based on combining: multipole-accelerated method-of-moments techniques for extracting frequency-dependent inductances and resistances for the interconnect ; a sectioning method for tting the frequency-domain data with a rational function;...

The significant progress in the development of Rapid Single Flux Quantum (RSFQ) logic circuits indicates their potential for fast cryoelectronic device applications. The possibilities of realizing logic components based on this principle with high-T, superconductive (HTS) materials have been studied by means of numerical computations. The most crucial task is to manage the trade-off between des...

Representation of multiwinding transformers by equivalent circuits has been recently improved, and it is for the identification of components of these circuits. In this paper, the focus is on magnetic coupling with its related losses. A general method, based on external impedance measurements, is followed to determine inductances, coupling ratios, and resistances included in these equivalent ci...

The choice of impedance used to shunt a Josephson junction determines if the charge transferred through the circuit is quantized: a capacitive shunt renders the charge discrete, whereas an inductive shunt gives continuous charge. This discrepancy leads to a paradox in the limit of large inductances L. We show that while the energy spectra of the capacitively and inductively shunted junction are...

6 Abstract—Until recently most interconnect models took into account capacitances and resistances only. With operating frequencies in the GHz regime the effect of the magnetic field can no longer be neglected. Inductances, skin effect, and transmission line behavior have to be considered carefully. For many complicated topographies, where lumped or onedimensional distributed models do not reach...