Universal Model of Pulsed Alternators Using LTspice

The high power and energy density of synchronous machines turn them into reliable sources of energy for pulsed power applications. In this article, two mathematical models using both actual and normalized (per-unit) parameters have been developed and simulated in LTspice, which is a powerful and a f...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2020-10, Vol.48 (10), p.3435-3442
Main Authors: Negri, Cesar A., Dehnavi, Saeed Daneshvar, Giesselmann, Michael G.
Format: Article
Language:English
Subjects:
Alternators
Circuits
Damper windings
Electronic circuits
Energy sources
Energy storage
Flux density
Integrated circuit modeling
Load modeling
Mathematical model
Mathematical models
Modeling
nonlinear circuits
Parameters
Peak load
Power
pulse power systems
Rotors
Simulation
Stator windings
synchronous generator transient analysis
Synchronous machines
Time constant
Windings
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Description
Summary:The high power and energy density of synchronous machines turn them into reliable sources of energy for pulsed power applications. In this article, two mathematical models using both actual and normalized (per-unit) parameters have been developed and simulated in LTspice, which is a powerful and a free tool to simulate electrical/electronic circuits. In this article, an efficient solver based on the flux and current equations is presented. The model has been validated against published results with both actual and per-unit parameters. It has been observed that for models with normalized parameters, the simulation time is significantly reduced. The validated model of the machine has been used to show the effects of nonlinear loads on the voltages and currents, in particular the reaction currents in the damper winding inside of the generator. In addition, the model has been used to study the effect of the RC time constant of the load on the peak power provided by a synchronous machine used to store energy for pulsed power applications.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2020.3017177