The transient simulation model of impedance-matched balancing transformers is established. The effect of transient model and equivalent circuit in calculation of steady short circuit current are compared.
Applying the equivalent circuits, the starting performance of the motor are calculated, and the general expressions of the starting current decreasing a factor K_(iQ), the starting torque decreasing a factor K_(mQ) and voltage decreasing a factor K_(uQ) are obtained
In order to make a study of the damage to Metal Oxide Surge Arrester which is arised from very fast transient overvoltages,this paper presents the equivalent circuits of metal oxide varistor(MOV) under different surge current waves,such as 8/20? 4/10?
A detail analysis and emulation of the supply net's harmonic condition of the AC adjustable speed system whose asynchronous motor is driven by the voltaged PWM frequency converter that is mostly run on line, is presented in this paper. The formula how to calculate the parameter of the equal circuit of the adjustable speed system is deduced. On the basis of the rational equalization of the system,the voltage and current of the supply net are analyzed to the different frequency harmonic hefts.
The loci can be represented by two weakly overlapping semicircles characterized by two parallel equivalent circuits R1C1 and R2C2 connected in series.
Conditions for a complete decidability of equivalent circuits are shown by the example of a system that comprises several parallel branches consisting of the Frumkin-Melik-Gaikazyan impedances.
In this, they advantageously differ from speculative elements of equivalent circuits.
The results of nonlinear regression analysis show that the Frumkin-Melik-Gaikazyan (FMG) or Frumkin-Melik-Gaikazyan-Randles (FMGR) equivalent circuits can be used for the simulation of experimental impedance data.
Equivalent circuits, intended for modeling impedance spectra, are proposed.