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Abstract
Several applications need high voltage and low rise time pulses that increasing of the voltage level can be done by using transformer. The rise time is increased because of transformer leakage inductance. One of the methods to decrease the rise time is using auxiliary windings between primary and secondary. In this paper, one type of pulse transformer included auxiliary windings is modeled and simulated in ANSYS software. In this study, at first the transformer has been simulated without auxiliary windings and the leakage and self inductances are obtained then the auxiliary windings are considered in the model to calculate the leakage and self inductances of the transformer. Simulation results can be used to investigate the effect of auxiliary winding on the leakage inductance.
Highlights
High-voltage pulses are often obtained from a pulse generating circuit driving a high-voltage pulse transformer
The effect of auxiliary windings used in a pulse transformer is investigated
The auxiliary windings were placed in proximity of primary and secondary windings
Summary
High-voltage pulses are often obtained from a pulse generating circuit driving a high-voltage pulse transformer. The rise time of high voltage pulse is depending on the leakage inductance Many applications, such as medical, technology and military need high-voltage fast rising pulses. If the leakage inductance in the high-voltage pulse transformer needs to be reduced, two subtractive connected windings can be added to the transformer. If these windings are fitted with the same number of turns, the electromotive force generated in the auxiliary windings is due only to the primary and secondary leakage flux. The most attractive winding configuration for high voltage, the core-type transformer with primary and secondary on different core legs, is seldom used in pulsed application, because of its weak magnetic coupling between windings, which would result in a slow-rising output voltage pulse.
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